Use mod vendor for vendored directory (backwards compatible)

29 files changed, 0 insertions, 7242 deletions

diff --git a/vendor/golang.org/x/crypto/openpgp/LICENSE b/vendor/golang.org/x/crypto/openpgp/LICENSE
deleted file mode 100644
index 6a66aea5..00000000
--- a/vendor/golang.org/x/crypto/openpgp/LICENSE
+++ /dev/null
@@ -1,27 +0,0 @@
-Copyright (c) 2009 The Go Authors. All rights reserved.
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are
-met:
-
-   * Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.
-   * Redistributions in binary form must reproduce the above
-copyright notice, this list of conditions and the following disclaimer
-in the documentation and/or other materials provided with the
-distribution.
-   * Neither the name of Google Inc. nor the names of its
-contributors may be used to endorse or promote products derived from
-this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/golang.org/x/crypto/openpgp/armor/armor.go b/vendor/golang.org/x/crypto/openpgp/armor/armor.go
deleted file mode 100644
index 592d1864..00000000
--- a/vendor/golang.org/x/crypto/openpgp/armor/armor.go
+++ /dev/null
@@ -1,219 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package armor implements OpenPGP ASCII Armor, see RFC 4880. OpenPGP Armor is
-// very similar to PEM except that it has an additional CRC checksum.
-package armor // import "golang.org/x/crypto/openpgp/armor"
-
-import (
-	"bufio"
-	"bytes"
-	"encoding/base64"
-	"golang.org/x/crypto/openpgp/errors"
-	"io"
-)
-
-// A Block represents an OpenPGP armored structure.
-//
-// The encoded form is:
-//    -----BEGIN Type-----
-//    Headers
-//
-//    base64-encoded Bytes
-//    '=' base64 encoded checksum
-//    -----END Type-----
-// where Headers is a possibly empty sequence of Key: Value lines.
-//
-// Since the armored data can be very large, this package presents a streaming
-// interface.
-type Block struct {
-	Type    string            // The type, taken from the preamble (i.e. "PGP SIGNATURE").
-	Header  map[string]string // Optional headers.
-	Body    io.Reader         // A Reader from which the contents can be read
-	lReader lineReader
-	oReader openpgpReader
-}
-
-var ArmorCorrupt error = errors.StructuralError("armor invalid")
-
-const crc24Init = 0xb704ce
-const crc24Poly = 0x1864cfb
-const crc24Mask = 0xffffff
-
-// crc24 calculates the OpenPGP checksum as specified in RFC 4880, section 6.1
-func crc24(crc uint32, d []byte) uint32 {
-	for _, b := range d {
-		crc ^= uint32(b) << 16
-		for i := 0; i < 8; i++ {
-			crc <<= 1
-			if crc&0x1000000 != 0 {
-				crc ^= crc24Poly
-			}
-		}
-	}
-	return crc
-}
-
-var armorStart = []byte("-----BEGIN ")
-var armorEnd = []byte("-----END ")
-var armorEndOfLine = []byte("-----")
-
-// lineReader wraps a line based reader. It watches for the end of an armor
-// block and records the expected CRC value.
-type lineReader struct {
-	in  *bufio.Reader
-	buf []byte
-	eof bool
-	crc uint32
-}
-
-func (l *lineReader) Read(p []byte) (n int, err error) {
-	if l.eof {
-		return 0, io.EOF
-	}
-
-	if len(l.buf) > 0 {
-		n = copy(p, l.buf)
-		l.buf = l.buf[n:]
-		return
-	}
-
-	line, isPrefix, err := l.in.ReadLine()
-	if err != nil {
-		return
-	}
-	if isPrefix {
-		return 0, ArmorCorrupt
-	}
-
-	if len(line) == 5 && line[0] == '=' {
-		// This is the checksum line
-		var expectedBytes [3]byte
-		var m int
-		m, err = base64.StdEncoding.Decode(expectedBytes[0:], line[1:])
-		if m != 3 || err != nil {
-			return
-		}
-		l.crc = uint32(expectedBytes[0])<<16 |
-			uint32(expectedBytes[1])<<8 |
-			uint32(expectedBytes[2])
-
-		line, _, err = l.in.ReadLine()
-		if err != nil && err != io.EOF {
-			return
-		}
-		if !bytes.HasPrefix(line, armorEnd) {
-			return 0, ArmorCorrupt
-		}
-
-		l.eof = true
-		return 0, io.EOF
-	}
-
-	if len(line) > 96 {
-		return 0, ArmorCorrupt
-	}
-
-	n = copy(p, line)
-	bytesToSave := len(line) - n
-	if bytesToSave > 0 {
-		if cap(l.buf) < bytesToSave {
-			l.buf = make([]byte, 0, bytesToSave)
-		}
-		l.buf = l.buf[0:bytesToSave]
-		copy(l.buf, line[n:])
-	}
-
-	return
-}
-
-// openpgpReader passes Read calls to the underlying base64 decoder, but keeps
-// a running CRC of the resulting data and checks the CRC against the value
-// found by the lineReader at EOF.
-type openpgpReader struct {
-	lReader    *lineReader
-	b64Reader  io.Reader
-	currentCRC uint32
-}
-
-func (r *openpgpReader) Read(p []byte) (n int, err error) {
-	n, err = r.b64Reader.Read(p)
-	r.currentCRC = crc24(r.currentCRC, p[:n])
-
-	if err == io.EOF {
-		if r.lReader.crc != uint32(r.currentCRC&crc24Mask) {
-			return 0, ArmorCorrupt
-		}
-	}
-
-	return
-}
-
-// Decode reads a PGP armored block from the given Reader. It will ignore
-// leading garbage. If it doesn't find a block, it will return nil, io.EOF. The
-// given Reader is not usable after calling this function: an arbitrary amount
-// of data may have been read past the end of the block.
-func Decode(in io.Reader) (p *Block, err error) {
-	r := bufio.NewReaderSize(in, 100)
-	var line []byte
-	ignoreNext := false
-
-TryNextBlock:
-	p = nil
-
-	// Skip leading garbage
-	for {
-		ignoreThis := ignoreNext
-		line, ignoreNext, err = r.ReadLine()
-		if err != nil {
-			return
-		}
-		if ignoreNext || ignoreThis {
-			continue
-		}
-		line = bytes.TrimSpace(line)
-		if len(line) > len(armorStart)+len(armorEndOfLine) && bytes.HasPrefix(line, armorStart) {
-			break
-		}
-	}
-
-	p = new(Block)
-	p.Type = string(line[len(armorStart) : len(line)-len(armorEndOfLine)])
-	p.Header = make(map[string]string)
-	nextIsContinuation := false
-	var lastKey string
-
-	// Read headers
-	for {
-		isContinuation := nextIsContinuation
-		line, nextIsContinuation, err = r.ReadLine()
-		if err != nil {
-			p = nil
-			return
-		}
-		if isContinuation {
-			p.Header[lastKey] += string(line)
-			continue
-		}
-		line = bytes.TrimSpace(line)
-		if len(line) == 0 {
-			break
-		}
-
-		i := bytes.Index(line, []byte(": "))
-		if i == -1 {
-			goto TryNextBlock
-		}
-		lastKey = string(line[:i])
-		p.Header[lastKey] = string(line[i+2:])
-	}
-
-	p.lReader.in = r
-	p.oReader.currentCRC = crc24Init
-	p.oReader.lReader = &p.lReader
-	p.oReader.b64Reader = base64.NewDecoder(base64.StdEncoding, &p.lReader)
-	p.Body = &p.oReader
-
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/armor/encode.go b/vendor/golang.org/x/crypto/openpgp/armor/encode.go
deleted file mode 100644
index 6f07582c..00000000
--- a/vendor/golang.org/x/crypto/openpgp/armor/encode.go
+++ /dev/null
@@ -1,160 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package armor
-
-import (
-	"encoding/base64"
-	"io"
-)
-
-var armorHeaderSep = []byte(": ")
-var blockEnd = []byte("\n=")
-var newline = []byte("\n")
-var armorEndOfLineOut = []byte("-----\n")
-
-// writeSlices writes its arguments to the given Writer.
-func writeSlices(out io.Writer, slices ...[]byte) (err error) {
-	for _, s := range slices {
-		_, err = out.Write(s)
-		if err != nil {
-			return err
-		}
-	}
-	return
-}
-
-// lineBreaker breaks data across several lines, all of the same byte length
-// (except possibly the last). Lines are broken with a single '\n'.
-type lineBreaker struct {
-	lineLength  int
-	line        []byte
-	used        int
-	out         io.Writer
-	haveWritten bool
-}
-
-func newLineBreaker(out io.Writer, lineLength int) *lineBreaker {
-	return &lineBreaker{
-		lineLength: lineLength,
-		line:       make([]byte, lineLength),
-		used:       0,
-		out:        out,
-	}
-}
-
-func (l *lineBreaker) Write(b []byte) (n int, err error) {
-	n = len(b)
-
-	if n == 0 {
-		return
-	}
-
-	if l.used == 0 && l.haveWritten {
-		_, err = l.out.Write([]byte{'\n'})
-		if err != nil {
-			return
-		}
-	}
-
-	if l.used+len(b) < l.lineLength {
-		l.used += copy(l.line[l.used:], b)
-		return
-	}
-
-	l.haveWritten = true
-	_, err = l.out.Write(l.line[0:l.used])
-	if err != nil {
-		return
-	}
-	excess := l.lineLength - l.used
-	l.used = 0
-
-	_, err = l.out.Write(b[0:excess])
-	if err != nil {
-		return
-	}
-
-	_, err = l.Write(b[excess:])
-	return
-}
-
-func (l *lineBreaker) Close() (err error) {
-	if l.used > 0 {
-		_, err = l.out.Write(l.line[0:l.used])
-		if err != nil {
-			return
-		}
-	}
-
-	return
-}
-
-// encoding keeps track of a running CRC24 over the data which has been written
-// to it and outputs a OpenPGP checksum when closed, followed by an armor
-// trailer.
-//
-// It's built into a stack of io.Writers:
-//    encoding -> base64 encoder -> lineBreaker -> out
-type encoding struct {
-	out       io.Writer
-	breaker   *lineBreaker
-	b64       io.WriteCloser
-	crc       uint32
-	blockType []byte
-}
-
-func (e *encoding) Write(data []byte) (n int, err error) {
-	e.crc = crc24(e.crc, data)
-	return e.b64.Write(data)
-}
-
-func (e *encoding) Close() (err error) {
-	err = e.b64.Close()
-	if err != nil {
-		return
-	}
-	e.breaker.Close()
-
-	var checksumBytes [3]byte
-	checksumBytes[0] = byte(e.crc >> 16)
-	checksumBytes[1] = byte(e.crc >> 8)
-	checksumBytes[2] = byte(e.crc)
-
-	var b64ChecksumBytes [4]byte
-	base64.StdEncoding.Encode(b64ChecksumBytes[:], checksumBytes[:])
-
-	return writeSlices(e.out, blockEnd, b64ChecksumBytes[:], newline, armorEnd, e.blockType, armorEndOfLine)
-}
-
-// Encode returns a WriteCloser which will encode the data written to it in
-// OpenPGP armor.
-func Encode(out io.Writer, blockType string, headers map[string]string) (w io.WriteCloser, err error) {
-	bType := []byte(blockType)
-	err = writeSlices(out, armorStart, bType, armorEndOfLineOut)
-	if err != nil {
-		return
-	}
-
-	for k, v := range headers {
-		err = writeSlices(out, []byte(k), armorHeaderSep, []byte(v), newline)
-		if err != nil {
-			return
-		}
-	}
-
-	_, err = out.Write(newline)
-	if err != nil {
-		return
-	}
-
-	e := &encoding{
-		out:       out,
-		breaker:   newLineBreaker(out, 64),
-		crc:       crc24Init,
-		blockType: bType,
-	}
-	e.b64 = base64.NewEncoder(base64.StdEncoding, e.breaker)
-	return e, nil
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/canonical_text.go b/vendor/golang.org/x/crypto/openpgp/canonical_text.go
deleted file mode 100644
index e601e389..00000000
--- a/vendor/golang.org/x/crypto/openpgp/canonical_text.go
+++ /dev/null
@@ -1,59 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package openpgp
-
-import "hash"
-
-// NewCanonicalTextHash reformats text written to it into the canonical
-// form and then applies the hash h.  See RFC 4880, section 5.2.1.
-func NewCanonicalTextHash(h hash.Hash) hash.Hash {
-	return &canonicalTextHash{h, 0}
-}
-
-type canonicalTextHash struct {
-	h hash.Hash
-	s int
-}
-
-var newline = []byte{'\r', '\n'}
-
-func (cth *canonicalTextHash) Write(buf []byte) (int, error) {
-	start := 0
-
-	for i, c := range buf {
-		switch cth.s {
-		case 0:
-			if c == '\r' {
-				cth.s = 1
-			} else if c == '\n' {
-				cth.h.Write(buf[start:i])
-				cth.h.Write(newline)
-				start = i + 1
-			}
-		case 1:
-			cth.s = 0
-		}
-	}
-
-	cth.h.Write(buf[start:])
-	return len(buf), nil
-}
-
-func (cth *canonicalTextHash) Sum(in []byte) []byte {
-	return cth.h.Sum(in)
-}
-
-func (cth *canonicalTextHash) Reset() {
-	cth.h.Reset()
-	cth.s = 0
-}
-
-func (cth *canonicalTextHash) Size() int {
-	return cth.h.Size()
-}
-
-func (cth *canonicalTextHash) BlockSize() int {
-	return cth.h.BlockSize()
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/clearsign/clearsign.go b/vendor/golang.org/x/crypto/openpgp/clearsign/clearsign.go
deleted file mode 100644
index def4caba..00000000
--- a/vendor/golang.org/x/crypto/openpgp/clearsign/clearsign.go
+++ /dev/null
@@ -1,376 +0,0 @@
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package clearsign generates and processes OpenPGP, clear-signed data. See
-// RFC 4880, section 7.
-//
-// Clearsigned messages are cryptographically signed, but the contents of the
-// message are kept in plaintext so that it can be read without special tools.
-package clearsign // import "golang.org/x/crypto/openpgp/clearsign"
-
-import (
-	"bufio"
-	"bytes"
-	"crypto"
-	"hash"
-	"io"
-	"net/textproto"
-	"strconv"
-
-	"golang.org/x/crypto/openpgp/armor"
-	"golang.org/x/crypto/openpgp/errors"
-	"golang.org/x/crypto/openpgp/packet"
-)
-
-// A Block represents a clearsigned message. A signature on a Block can
-// be checked by passing Bytes into openpgp.CheckDetachedSignature.
-type Block struct {
-	Headers          textproto.MIMEHeader // Optional message headers
-	Plaintext        []byte               // The original message text
-	Bytes            []byte               // The signed message
-	ArmoredSignature *armor.Block         // The signature block
-}
-
-// start is the marker which denotes the beginning of a clearsigned message.
-var start = []byte("\n-----BEGIN PGP SIGNED MESSAGE-----")
-
-// dashEscape is prefixed to any lines that begin with a hyphen so that they
-// can't be confused with endText.
-var dashEscape = []byte("- ")
-
-// endText is a marker which denotes the end of the message and the start of
-// an armored signature.
-var endText = []byte("-----BEGIN PGP SIGNATURE-----")
-
-// end is a marker which denotes the end of the armored signature.
-var end = []byte("\n-----END PGP SIGNATURE-----")
-
-var crlf = []byte("\r\n")
-var lf = byte('\n')
-
-// getLine returns the first \r\n or \n delineated line from the given byte
-// array. The line does not include the \r\n or \n. The remainder of the byte
-// array (also not including the new line bytes) is also returned and this will
-// always be smaller than the original argument.
-func getLine(data []byte) (line, rest []byte) {
-	i := bytes.Index(data, []byte{'\n'})
-	var j int
-	if i < 0 {
-		i = len(data)
-		j = i
-	} else {
-		j = i + 1
-		if i > 0 && data[i-1] == '\r' {
-			i--
-		}
-	}
-	return data[0:i], data[j:]
-}
-
-// Decode finds the first clearsigned message in data and returns it, as well
-// as the suffix of data which remains after the message.
-func Decode(data []byte) (b *Block, rest []byte) {
-	// start begins with a newline. However, at the very beginning of
-	// the byte array, we'll accept the start string without it.
-	rest = data
-	if bytes.HasPrefix(data, start[1:]) {
-		rest = rest[len(start)-1:]
-	} else if i := bytes.Index(data, start); i >= 0 {
-		rest = rest[i+len(start):]
-	} else {
-		return nil, data
-	}
-
-	// Consume the start line.
-	_, rest = getLine(rest)
-
-	var line []byte
-	b = &Block{
-		Headers: make(textproto.MIMEHeader),
-	}
-
-	// Next come a series of header lines.
-	for {
-		// This loop terminates because getLine's second result is
-		// always smaller than its argument.
-		if len(rest) == 0 {
-			return nil, data
-		}
-		// An empty line marks the end of the headers.
-		if line, rest = getLine(rest); len(line) == 0 {
-			break
-		}
-
-		i := bytes.Index(line, []byte{':'})
-		if i == -1 {
-			return nil, data
-		}
-
-		key, val := line[0:i], line[i+1:]
-		key = bytes.TrimSpace(key)
-		val = bytes.TrimSpace(val)
-		b.Headers.Add(string(key), string(val))
-	}
-
-	firstLine := true
-	for {
-		start := rest
-
-		line, rest = getLine(rest)
-		if len(line) == 0 && len(rest) == 0 {
-			// No armored data was found, so this isn't a complete message.
-			return nil, data
-		}
-		if bytes.Equal(line, endText) {
-			// Back up to the start of the line because armor expects to see the
-			// header line.
-			rest = start
-			break
-		}
-
-		// The final CRLF isn't included in the hash so we don't write it until
-		// we've seen the next line.
-		if firstLine {
-			firstLine = false
-		} else {
-			b.Bytes = append(b.Bytes, crlf...)
-		}
-
-		if bytes.HasPrefix(line, dashEscape) {
-			line = line[2:]
-		}
-		line = bytes.TrimRight(line, " \t")
-		b.Bytes = append(b.Bytes, line...)
-
-		b.Plaintext = append(b.Plaintext, line...)
-		b.Plaintext = append(b.Plaintext, lf)
-	}
-
-	// We want to find the extent of the armored data (including any newlines at
-	// the end).
-	i := bytes.Index(rest, end)
-	if i == -1 {
-		return nil, data
-	}
-	i += len(end)
-	for i < len(rest) && (rest[i] == '\r' || rest[i] == '\n') {
-		i++
-	}
-	armored := rest[:i]
-	rest = rest[i:]
-
-	var err error
-	b.ArmoredSignature, err = armor.Decode(bytes.NewBuffer(armored))
-	if err != nil {
-		return nil, data
-	}
-
-	return b, rest
-}
-
-// A dashEscaper is an io.WriteCloser which processes the body of a clear-signed
-// message. The clear-signed message is written to buffered and a hash, suitable
-// for signing, is maintained in h.
-//
-// When closed, an armored signature is created and written to complete the
-// message.
-type dashEscaper struct {
-	buffered *bufio.Writer
-	h        hash.Hash
-	hashType crypto.Hash
-
-	atBeginningOfLine bool
-	isFirstLine       bool
-
-	whitespace []byte
-	byteBuf    []byte // a one byte buffer to save allocations
-
-	privateKey *packet.PrivateKey
-	config     *packet.Config
-}
-
-func (d *dashEscaper) Write(data []byte) (n int, err error) {
-	for _, b := range data {
-		d.byteBuf[0] = b
-
-		if d.atBeginningOfLine {
-			// The final CRLF isn't included in the hash so we have to wait
-			// until this point (the start of the next line) before writing it.
-			if !d.isFirstLine {
-				d.h.Write(crlf)
-			}
-			d.isFirstLine = false
-		}
-
-		// Any whitespace at the end of the line has to be removed so we
-		// buffer it until we find out whether there's more on this line.
-		if b == ' ' || b == '\t' || b == '\r' {
-			d.whitespace = append(d.whitespace, b)
-			d.atBeginningOfLine = false
-			continue
-		}
-
-		if d.atBeginningOfLine {
-			// At the beginning of a line, hyphens have to be escaped.
-			if b == '-' {
-				// The signature isn't calculated over the dash-escaped text so
-				// the escape is only written to buffered.
-				if _, err = d.buffered.Write(dashEscape); err != nil {
-					return
-				}
-				d.h.Write(d.byteBuf)
-				d.atBeginningOfLine = false
-			} else if b == '\n' {
-				// Nothing to do because we delay writing CRLF to the hash.
-			} else {
-				d.h.Write(d.byteBuf)
-				d.atBeginningOfLine = false
-			}
-			if err = d.buffered.WriteByte(b); err != nil {
-				return
-			}
-		} else {
-			if b == '\n' {
-				// We got a raw \n. Drop any trailing whitespace and write a
-				// CRLF.
-				d.whitespace = d.whitespace[:0]
-				// We delay writing CRLF to the hash until the start of the
-				// next line.
-				if err = d.buffered.WriteByte(b); err != nil {
-					return
-				}
-				d.atBeginningOfLine = true
-			} else {
-				// Any buffered whitespace wasn't at the end of the line so
-				// we need to write it out.
-				if len(d.whitespace) > 0 {
-					d.h.Write(d.whitespace)
-					if _, err = d.buffered.Write(d.whitespace); err != nil {
-						return
-					}
-					d.whitespace = d.whitespace[:0]
-				}
-				d.h.Write(d.byteBuf)
-				if err = d.buffered.WriteByte(b); err != nil {
-					return
-				}
-			}
-		}
-	}
-
-	n = len(data)
-	return
-}
-
-func (d *dashEscaper) Close() (err error) {
-	if !d.atBeginningOfLine {
-		if err = d.buffered.WriteByte(lf); err != nil {
-			return
-		}
-	}
-	sig := new(packet.Signature)
-	sig.SigType = packet.SigTypeText
-	sig.PubKeyAlgo = d.privateKey.PubKeyAlgo
-	sig.Hash = d.hashType
-	sig.CreationTime = d.config.Now()
-	sig.IssuerKeyId = &d.privateKey.KeyId
-
-	if err = sig.Sign(d.h, d.privateKey, d.config); err != nil {
-		return
-	}
-
-	out, err := armor.Encode(d.buffered, "PGP SIGNATURE", nil)
-	if err != nil {
-		return
-	}
-
-	if err = sig.Serialize(out); err != nil {
-		return
-	}
-	if err = out.Close(); err != nil {
-		return
-	}
-	if err = d.buffered.Flush(); err != nil {
-		return
-	}
-	return
-}
-
-// Encode returns a WriteCloser which will clear-sign a message with privateKey
-// and write it to w. If config is nil, sensible defaults are used.
-func Encode(w io.Writer, privateKey *packet.PrivateKey, config *packet.Config) (plaintext io.WriteCloser, err error) {
-	if privateKey.Encrypted {
-		return nil, errors.InvalidArgumentError("signing key is encrypted")
-	}
-
-	hashType := config.Hash()
-	name := nameOfHash(hashType)
-	if len(name) == 0 {
-		return nil, errors.UnsupportedError("unknown hash type: " + strconv.Itoa(int(hashType)))
-	}
-
-	if !hashType.Available() {
-		return nil, errors.UnsupportedError("unsupported hash type: " + strconv.Itoa(int(hashType)))
-	}
-	h := hashType.New()
-
-	buffered := bufio.NewWriter(w)
-	// start has a \n at the beginning that we don't want here.
-	if _, err = buffered.Write(start[1:]); err != nil {
-		return
-	}
-	if err = buffered.WriteByte(lf); err != nil {
-		return
-	}
-	if _, err = buffered.WriteString("Hash: "); err != nil {
-		return
-	}
-	if _, err = buffered.WriteString(name); err != nil {
-		return
-	}
-	if err = buffered.WriteByte(lf); err != nil {
-		return
-	}
-	if err = buffered.WriteByte(lf); err != nil {
-		return
-	}
-
-	plaintext = &dashEscaper{
-		buffered: buffered,
-		h:        h,
-		hashType: hashType,
-
-		atBeginningOfLine: true,
-		isFirstLine:       true,
-
-		byteBuf: make([]byte, 1),
-
-		privateKey: privateKey,
-		config:     config,
-	}
-
-	return
-}
-
-// nameOfHash returns the OpenPGP name for the given hash, or the empty string
-// if the name isn't known. See RFC 4880, section 9.4.
-func nameOfHash(h crypto.Hash) string {
-	switch h {
-	case crypto.MD5:
-		return "MD5"
-	case crypto.SHA1:
-		return "SHA1"
-	case crypto.RIPEMD160:
-		return "RIPEMD160"
-	case crypto.SHA224:
-		return "SHA224"
-	case crypto.SHA256:
-		return "SHA256"
-	case crypto.SHA384:
-		return "SHA384"
-	case crypto.SHA512:
-		return "SHA512"
-	}
-	return ""
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go b/vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go
deleted file mode 100644
index 73f4fe37..00000000
--- a/vendor/golang.org/x/crypto/openpgp/elgamal/elgamal.go
+++ /dev/null
@@ -1,122 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package elgamal implements ElGamal encryption, suitable for OpenPGP,
-// as specified in "A Public-Key Cryptosystem and a Signature Scheme Based on
-// Discrete Logarithms," IEEE Transactions on Information Theory, v. IT-31,
-// n. 4, 1985, pp. 469-472.
-//
-// This form of ElGamal embeds PKCS#1 v1.5 padding, which may make it
-// unsuitable for other protocols. RSA should be used in preference in any
-// case.
-package elgamal // import "golang.org/x/crypto/openpgp/elgamal"
-
-import (
-	"crypto/rand"
-	"crypto/subtle"
-	"errors"
-	"io"
-	"math/big"
-)
-
-// PublicKey represents an ElGamal public key.
-type PublicKey struct {
-	G, P, Y *big.Int
-}
-
-// PrivateKey represents an ElGamal private key.
-type PrivateKey struct {
-	PublicKey
-	X *big.Int
-}
-
-// Encrypt encrypts the given message to the given public key. The result is a
-// pair of integers. Errors can result from reading random, or because msg is
-// too large to be encrypted to the public key.
-func Encrypt(random io.Reader, pub *PublicKey, msg []byte) (c1, c2 *big.Int, err error) {
-	pLen := (pub.P.BitLen() + 7) / 8
-	if len(msg) > pLen-11 {
-		err = errors.New("elgamal: message too long")
-		return
-	}
-
-	// EM = 0x02 || PS || 0x00 || M
-	em := make([]byte, pLen-1)
-	em[0] = 2
-	ps, mm := em[1:len(em)-len(msg)-1], em[len(em)-len(msg):]
-	err = nonZeroRandomBytes(ps, random)
-	if err != nil {
-		return
-	}
-	em[len(em)-len(msg)-1] = 0
-	copy(mm, msg)
-
-	m := new(big.Int).SetBytes(em)
-
-	k, err := rand.Int(random, pub.P)
-	if err != nil {
-		return
-	}
-
-	c1 = new(big.Int).Exp(pub.G, k, pub.P)
-	s := new(big.Int).Exp(pub.Y, k, pub.P)
-	c2 = s.Mul(s, m)
-	c2.Mod(c2, pub.P)
-
-	return
-}
-
-// Decrypt takes two integers, resulting from an ElGamal encryption, and
-// returns the plaintext of the message. An error can result only if the
-// ciphertext is invalid. Users should keep in mind that this is a padding
-// oracle and thus, if exposed to an adaptive chosen ciphertext attack, can
-// be used to break the cryptosystem.  See ``Chosen Ciphertext Attacks
-// Against Protocols Based on the RSA Encryption Standard PKCS #1'', Daniel
-// Bleichenbacher, Advances in Cryptology (Crypto '98),
-func Decrypt(priv *PrivateKey, c1, c2 *big.Int) (msg []byte, err error) {
-	s := new(big.Int).Exp(c1, priv.X, priv.P)
-	s.ModInverse(s, priv.P)
-	s.Mul(s, c2)
-	s.Mod(s, priv.P)
-	em := s.Bytes()
-
-	firstByteIsTwo := subtle.ConstantTimeByteEq(em[0], 2)
-
-	// The remainder of the plaintext must be a string of non-zero random
-	// octets, followed by a 0, followed by the message.
-	//   lookingForIndex: 1 iff we are still looking for the zero.
-	//   index: the offset of the first zero byte.
-	var lookingForIndex, index int
-	lookingForIndex = 1
-
-	for i := 1; i < len(em); i++ {
-		equals0 := subtle.ConstantTimeByteEq(em[i], 0)
-		index = subtle.ConstantTimeSelect(lookingForIndex&equals0, i, index)
-		lookingForIndex = subtle.ConstantTimeSelect(equals0, 0, lookingForIndex)
-	}
-
-	if firstByteIsTwo != 1 || lookingForIndex != 0 || index < 9 {
-		return nil, errors.New("elgamal: decryption error")
-	}
-	return em[index+1:], nil
-}
-
-// nonZeroRandomBytes fills the given slice with non-zero random octets.
-func nonZeroRandomBytes(s []byte, rand io.Reader) (err error) {
-	_, err = io.ReadFull(rand, s)
-	if err != nil {
-		return
-	}
-
-	for i := 0; i < len(s); i++ {
-		for s[i] == 0 {
-			_, err = io.ReadFull(rand, s[i:i+1])
-			if err != nil {
-				return
-			}
-		}
-	}
-
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/errors/errors.go b/vendor/golang.org/x/crypto/openpgp/errors/errors.go
deleted file mode 100644
index eb0550b2..00000000
--- a/vendor/golang.org/x/crypto/openpgp/errors/errors.go
+++ /dev/null
@@ -1,72 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package errors contains common error types for the OpenPGP packages.
-package errors // import "golang.org/x/crypto/openpgp/errors"
-
-import (
-	"strconv"
-)
-
-// A StructuralError is returned when OpenPGP data is found to be syntactically
-// invalid.
-type StructuralError string
-
-func (s StructuralError) Error() string {
-	return "openpgp: invalid data: " + string(s)
-}
-
-// UnsupportedError indicates that, although the OpenPGP data is valid, it
-// makes use of currently unimplemented features.
-type UnsupportedError string
-
-func (s UnsupportedError) Error() string {
-	return "openpgp: unsupported feature: " + string(s)
-}
-
-// InvalidArgumentError indicates that the caller is in error and passed an
-// incorrect value.
-type InvalidArgumentError string
-
-func (i InvalidArgumentError) Error() string {
-	return "openpgp: invalid argument: " + string(i)
-}
-
-// SignatureError indicates that a syntactically valid signature failed to
-// validate.
-type SignatureError string
-
-func (b SignatureError) Error() string {
-	return "openpgp: invalid signature: " + string(b)
-}
-
-type keyIncorrectError int
-
-func (ki keyIncorrectError) Error() string {
-	return "openpgp: incorrect key"
-}
-
-var ErrKeyIncorrect error = keyIncorrectError(0)
-
-type unknownIssuerError int
-
-func (unknownIssuerError) Error() string {
-	return "openpgp: signature made by unknown entity"
-}
-
-var ErrUnknownIssuer error = unknownIssuerError(0)
-
-type keyRevokedError int
-
-func (keyRevokedError) Error() string {
-	return "openpgp: signature made by revoked key"
-}
-
-var ErrKeyRevoked error = keyRevokedError(0)
-
-type UnknownPacketTypeError uint8
-
-func (upte UnknownPacketTypeError) Error() string {
-	return "openpgp: unknown packet type: " + strconv.Itoa(int(upte))
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/keys.go b/vendor/golang.org/x/crypto/openpgp/keys.go
deleted file mode 100644
index fd582a89..00000000
--- a/vendor/golang.org/x/crypto/openpgp/keys.go
+++ /dev/null
@@ -1,641 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package openpgp
-
-import (
-	"crypto/rsa"
-	"io"
-	"time"
-
-	"golang.org/x/crypto/openpgp/armor"
-	"golang.org/x/crypto/openpgp/errors"
-	"golang.org/x/crypto/openpgp/packet"
-)
-
-// PublicKeyType is the armor type for a PGP public key.
-var PublicKeyType = "PGP PUBLIC KEY BLOCK"
-
-// PrivateKeyType is the armor type for a PGP private key.
-var PrivateKeyType = "PGP PRIVATE KEY BLOCK"
-
-// An Entity represents the components of an OpenPGP key: a primary public key
-// (which must be a signing key), one or more identities claimed by that key,
-// and zero or more subkeys, which may be encryption keys.
-type Entity struct {
-	PrimaryKey  *packet.PublicKey
-	PrivateKey  *packet.PrivateKey
-	Identities  map[string]*Identity // indexed by Identity.Name
-	Revocations []*packet.Signature
-	Subkeys     []Subkey
-}
-
-// An Identity represents an identity claimed by an Entity and zero or more
-// assertions by other entities about that claim.
-type Identity struct {
-	Name          string // by convention, has the form "Full Name (comment) <email@example.com>"
-	UserId        *packet.UserId
-	SelfSignature *packet.Signature
-	Signatures    []*packet.Signature
-}
-
-// A Subkey is an additional public key in an Entity. Subkeys can be used for
-// encryption.
-type Subkey struct {
-	PublicKey  *packet.PublicKey
-	PrivateKey *packet.PrivateKey
-	Sig        *packet.Signature
-}
-
-// A Key identifies a specific public key in an Entity. This is either the
-// Entity's primary key or a subkey.
-type Key struct {
-	Entity        *Entity
-	PublicKey     *packet.PublicKey
-	PrivateKey    *packet.PrivateKey
-	SelfSignature *packet.Signature
-}
-
-// A KeyRing provides access to public and private keys.
-type KeyRing interface {
-	// KeysById returns the set of keys that have the given key id.
-	KeysById(id uint64) []Key
-	// KeysByIdAndUsage returns the set of keys with the given id
-	// that also meet the key usage given by requiredUsage.
-	// The requiredUsage is expressed as the bitwise-OR of
-	// packet.KeyFlag* values.
-	KeysByIdUsage(id uint64, requiredUsage byte) []Key
-	// DecryptionKeys returns all private keys that are valid for
-	// decryption.
-	DecryptionKeys() []Key
-}
-
-// primaryIdentity returns the Identity marked as primary or the first identity
-// if none are so marked.
-func (e *Entity) primaryIdentity() *Identity {
-	var firstIdentity *Identity
-	for _, ident := range e.Identities {
-		if firstIdentity == nil {
-			firstIdentity = ident
-		}
-		if ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId {
-			return ident
-		}
-	}
-	return firstIdentity
-}
-
-// encryptionKey returns the best candidate Key for encrypting a message to the
-// given Entity.
-func (e *Entity) encryptionKey(now time.Time) (Key, bool) {
-	candidateSubkey := -1
-
-	// Iterate the keys to find the newest key
-	var maxTime time.Time
-	for i, subkey := range e.Subkeys {
-		if subkey.Sig.FlagsValid &&
-			subkey.Sig.FlagEncryptCommunications &&
-			subkey.PublicKey.PubKeyAlgo.CanEncrypt() &&
-			!subkey.Sig.KeyExpired(now) &&
-			(maxTime.IsZero() || subkey.Sig.CreationTime.After(maxTime)) {
-			candidateSubkey = i
-			maxTime = subkey.Sig.CreationTime
-		}
-	}
-
-	if candidateSubkey != -1 {
-		subkey := e.Subkeys[candidateSubkey]
-		return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig}, true
-	}
-
-	// If we don't have any candidate subkeys for encryption and
-	// the primary key doesn't have any usage metadata then we
-	// assume that the primary key is ok. Or, if the primary key is
-	// marked as ok to encrypt to, then we can obviously use it.
-	i := e.primaryIdentity()
-	if !i.SelfSignature.FlagsValid || i.SelfSignature.FlagEncryptCommunications &&
-		e.PrimaryKey.PubKeyAlgo.CanEncrypt() &&
-		!i.SelfSignature.KeyExpired(now) {
-		return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature}, true
-	}
-
-	// This Entity appears to be signing only.
-	return Key{}, false
-}
-
-// signingKey return the best candidate Key for signing a message with this
-// Entity.
-func (e *Entity) signingKey(now time.Time) (Key, bool) {
-	candidateSubkey := -1
-
-	for i, subkey := range e.Subkeys {
-		if subkey.Sig.FlagsValid &&
-			subkey.Sig.FlagSign &&
-			subkey.PublicKey.PubKeyAlgo.CanSign() &&
-			!subkey.Sig.KeyExpired(now) {
-			candidateSubkey = i
-			break
-		}
-	}
-
-	if candidateSubkey != -1 {
-		subkey := e.Subkeys[candidateSubkey]
-		return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig}, true
-	}
-
-	// If we have no candidate subkey then we assume that it's ok to sign
-	// with the primary key.
-	i := e.primaryIdentity()
-	if !i.SelfSignature.FlagsValid || i.SelfSignature.FlagSign &&
-		!i.SelfSignature.KeyExpired(now) {
-		return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature}, true
-	}
-
-	return Key{}, false
-}
-
-// An EntityList contains one or more Entities.
-type EntityList []*Entity
-
-// KeysById returns the set of keys that have the given key id.
-func (el EntityList) KeysById(id uint64) (keys []Key) {
-	for _, e := range el {
-		if e.PrimaryKey.KeyId == id {
-			var selfSig *packet.Signature
-			for _, ident := range e.Identities {
-				if selfSig == nil {
-					selfSig = ident.SelfSignature
-				} else if ident.SelfSignature.IsPrimaryId != nil && *ident.SelfSignature.IsPrimaryId {
-					selfSig = ident.SelfSignature
-					break
-				}
-			}
-			keys = append(keys, Key{e, e.PrimaryKey, e.PrivateKey, selfSig})
-		}
-
-		for _, subKey := range e.Subkeys {
-			if subKey.PublicKey.KeyId == id {
-				keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, subKey.Sig})
-			}
-		}
-	}
-	return
-}
-
-// KeysByIdAndUsage returns the set of keys with the given id that also meet
-// the key usage given by requiredUsage.  The requiredUsage is expressed as
-// the bitwise-OR of packet.KeyFlag* values.
-func (el EntityList) KeysByIdUsage(id uint64, requiredUsage byte) (keys []Key) {
-	for _, key := range el.KeysById(id) {
-		if len(key.Entity.Revocations) > 0 {
-			continue
-		}
-
-		if key.SelfSignature.RevocationReason != nil {
-			continue
-		}
-
-		if key.SelfSignature.FlagsValid && requiredUsage != 0 {
-			var usage byte
-			if key.SelfSignature.FlagCertify {
-				usage |= packet.KeyFlagCertify
-			}
-			if key.SelfSignature.FlagSign {
-				usage |= packet.KeyFlagSign
-			}
-			if key.SelfSignature.FlagEncryptCommunications {
-				usage |= packet.KeyFlagEncryptCommunications
-			}
-			if key.SelfSignature.FlagEncryptStorage {
-				usage |= packet.KeyFlagEncryptStorage
-			}
-			if usage&requiredUsage != requiredUsage {
-				continue
-			}
-		}
-
-		keys = append(keys, key)
-	}
-	return
-}
-
-// DecryptionKeys returns all private keys that are valid for decryption.
-func (el EntityList) DecryptionKeys() (keys []Key) {
-	for _, e := range el {
-		for _, subKey := range e.Subkeys {
-			if subKey.PrivateKey != nil && (!subKey.Sig.FlagsValid || subKey.Sig.FlagEncryptStorage || subKey.Sig.FlagEncryptCommunications) {
-				keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, subKey.Sig})
-			}
-		}
-	}
-	return
-}
-
-// ReadArmoredKeyRing reads one or more public/private keys from an armor keyring file.
-func ReadArmoredKeyRing(r io.Reader) (EntityList, error) {
-	block, err := armor.Decode(r)
-	if err == io.EOF {
-		return nil, errors.InvalidArgumentError("no armored data found")
-	}
-	if err != nil {
-		return nil, err
-	}
-	if block.Type != PublicKeyType && block.Type != PrivateKeyType {
-		return nil, errors.InvalidArgumentError("expected public or private key block, got: " + block.Type)
-	}
-
-	return ReadKeyRing(block.Body)
-}
-
-// ReadKeyRing reads one or more public/private keys. Unsupported keys are
-// ignored as long as at least a single valid key is found.
-func ReadKeyRing(r io.Reader) (el EntityList, err error) {
-	packets := packet.NewReader(r)
-	var lastUnsupportedError error
-
-	for {
-		var e *Entity
-		e, err = ReadEntity(packets)
-		if err != nil {
-			// TODO: warn about skipped unsupported/unreadable keys
-			if _, ok := err.(errors.UnsupportedError); ok {
-				lastUnsupportedError = err
-				err = readToNextPublicKey(packets)
-			} else if _, ok := err.(errors.StructuralError); ok {
-				// Skip unreadable, badly-formatted keys
-				lastUnsupportedError = err
-				err = readToNextPublicKey(packets)
-			}
-			if err == io.EOF {
-				err = nil
-				break
-			}
-			if err != nil {
-				el = nil
-				break
-			}
-		} else {
-			el = append(el, e)
-		}
-	}
-
-	if len(el) == 0 && err == nil {
-		err = lastUnsupportedError
-	}
-	return
-}
-
-// readToNextPublicKey reads packets until the start of the entity and leaves
-// the first packet of the new entity in the Reader.
-func readToNextPublicKey(packets *packet.Reader) (err error) {
-	var p packet.Packet
-	for {
-		p, err = packets.Next()
-		if err == io.EOF {
-			return
-		} else if err != nil {
-			if _, ok := err.(errors.UnsupportedError); ok {
-				err = nil
-				continue
-			}
-			return
-		}
-
-		if pk, ok := p.(*packet.PublicKey); ok && !pk.IsSubkey {
-			packets.Unread(p)
-			return
-		}
-	}
-}
-
-// ReadEntity reads an entity (public key, identities, subkeys etc) from the
-// given Reader.
-func ReadEntity(packets *packet.Reader) (*Entity, error) {
-	e := new(Entity)
-	e.Identities = make(map[string]*Identity)
-
-	p, err := packets.Next()
-	if err != nil {
-		return nil, err
-	}
-
-	var ok bool
-	if e.PrimaryKey, ok = p.(*packet.PublicKey); !ok {
-		if e.PrivateKey, ok = p.(*packet.PrivateKey); !ok {
-			packets.Unread(p)
-			return nil, errors.StructuralError("first packet was not a public/private key")
-		}
-		e.PrimaryKey = &e.PrivateKey.PublicKey
-	}
-
-	if !e.PrimaryKey.PubKeyAlgo.CanSign() {
-		return nil, errors.StructuralError("primary key cannot be used for signatures")
-	}
-
-	var current *Identity
-	var revocations []*packet.Signature
-EachPacket:
-	for {
-		p, err := packets.Next()
-		if err == io.EOF {
-			break
-		} else if err != nil {
-			return nil, err
-		}
-
-		switch pkt := p.(type) {
-		case *packet.UserId:
-			current = new(Identity)
-			current.Name = pkt.Id
-			current.UserId = pkt
-			e.Identities[pkt.Id] = current
-
-			for {
-				p, err = packets.Next()
-				if err == io.EOF {
-					return nil, io.ErrUnexpectedEOF
-				} else if err != nil {
-					return nil, err
-				}
-
-				sig, ok := p.(*packet.Signature)
-				if !ok {
-					return nil, errors.StructuralError("user ID packet not followed by self-signature")
-				}
-
-				if (sig.SigType == packet.SigTypePositiveCert || sig.SigType == packet.SigTypeGenericCert) && sig.IssuerKeyId != nil && *sig.IssuerKeyId == e.PrimaryKey.KeyId {
-					if err = e.PrimaryKey.VerifyUserIdSignature(pkt.Id, e.PrimaryKey, sig); err != nil {
-						return nil, errors.StructuralError("user ID self-signature invalid: " + err.Error())
-					}
-					current.SelfSignature = sig
-					break
-				}
-				current.Signatures = append(current.Signatures, sig)
-			}
-		case *packet.Signature:
-			if pkt.SigType == packet.SigTypeKeyRevocation {
-				revocations = append(revocations, pkt)
-			} else if pkt.SigType == packet.SigTypeDirectSignature {
-				// TODO: RFC4880 5.2.1 permits signatures
-				// directly on keys (eg. to bind additional
-				// revocation keys).
-			} else if current == nil {
-				return nil, errors.StructuralError("signature packet found before user id packet")
-			} else {
-				current.Signatures = append(current.Signatures, pkt)
-			}
-		case *packet.PrivateKey:
-			if pkt.IsSubkey == false {
-				packets.Unread(p)
-				break EachPacket
-			}
-			err = addSubkey(e, packets, &pkt.PublicKey, pkt)
-			if err != nil {
-				return nil, err
-			}
-		case *packet.PublicKey:
-			if pkt.IsSubkey == false {
-				packets.Unread(p)
-				break EachPacket
-			}
-			err = addSubkey(e, packets, pkt, nil)
-			if err != nil {
-				return nil, err
-			}
-		default:
-			// we ignore unknown packets
-		}
-	}
-
-	if len(e.Identities) == 0 {
-		return nil, errors.StructuralError("entity without any identities")
-	}
-
-	for _, revocation := range revocations {
-		err = e.PrimaryKey.VerifyRevocationSignature(revocation)
-		if err == nil {
-			e.Revocations = append(e.Revocations, revocation)
-		} else {
-			// TODO: RFC 4880 5.2.3.15 defines revocation keys.
-			return nil, errors.StructuralError("revocation signature signed by alternate key")
-		}
-	}
-
-	return e, nil
-}
-
-func addSubkey(e *Entity, packets *packet.Reader, pub *packet.PublicKey, priv *packet.PrivateKey) error {
-	var subKey Subkey
-	subKey.PublicKey = pub
-	subKey.PrivateKey = priv
-	p, err := packets.Next()
-	if err == io.EOF {
-		return io.ErrUnexpectedEOF
-	}
-	if err != nil {
-		return errors.StructuralError("subkey signature invalid: " + err.Error())
-	}
-	var ok bool
-	subKey.Sig, ok = p.(*packet.Signature)
-	if !ok {
-		return errors.StructuralError("subkey packet not followed by signature")
-	}
-	if subKey.Sig.SigType != packet.SigTypeSubkeyBinding && subKey.Sig.SigType != packet.SigTypeSubkeyRevocation {
-		return errors.StructuralError("subkey signature with wrong type")
-	}
-	err = e.PrimaryKey.VerifyKeySignature(subKey.PublicKey, subKey.Sig)
-	if err != nil {
-		return errors.StructuralError("subkey signature invalid: " + err.Error())
-	}
-	e.Subkeys = append(e.Subkeys, subKey)
-	return nil
-}
-
-const defaultRSAKeyBits = 2048
-
-// NewEntity returns an Entity that contains a fresh RSA/RSA keypair with a
-// single identity composed of the given full name, comment and email, any of
-// which may be empty but must not contain any of "()<>\x00".
-// If config is nil, sensible defaults will be used.
-func NewEntity(name, comment, email string, config *packet.Config) (*Entity, error) {
-	currentTime := config.Now()
-
-	bits := defaultRSAKeyBits
-	if config != nil && config.RSABits != 0 {
-		bits = config.RSABits
-	}
-
-	uid := packet.NewUserId(name, comment, email)
-	if uid == nil {
-		return nil, errors.InvalidArgumentError("user id field contained invalid characters")
-	}
-	signingPriv, err := rsa.GenerateKey(config.Random(), bits)
-	if err != nil {
-		return nil, err
-	}
-	encryptingPriv, err := rsa.GenerateKey(config.Random(), bits)
-	if err != nil {
-		return nil, err
-	}
-
-	e := &Entity{
-		PrimaryKey: packet.NewRSAPublicKey(currentTime, &signingPriv.PublicKey),
-		PrivateKey: packet.NewRSAPrivateKey(currentTime, signingPriv),
-		Identities: make(map[string]*Identity),
-	}
-	isPrimaryId := true
-	e.Identities[uid.Id] = &Identity{
-		Name:   uid.Id,
-		UserId: uid,
-		SelfSignature: &packet.Signature{
-			CreationTime: currentTime,
-			SigType:      packet.SigTypePositiveCert,
-			PubKeyAlgo:   packet.PubKeyAlgoRSA,
-			Hash:         config.Hash(),
-			IsPrimaryId:  &isPrimaryId,
-			FlagsValid:   true,
-			FlagSign:     true,
-			FlagCertify:  true,
-			IssuerKeyId:  &e.PrimaryKey.KeyId,
-		},
-	}
-
-	// If the user passes in a DefaultHash via packet.Config,
-	// set the PreferredHash for the SelfSignature.
-	if config != nil && config.DefaultHash != 0 {
-		e.Identities[uid.Id].SelfSignature.PreferredHash = []uint8{hashToHashId(config.DefaultHash)}
-	}
-
-	// Likewise for DefaultCipher.
-	if config != nil && config.DefaultCipher != 0 {
-		e.Identities[uid.Id].SelfSignature.PreferredSymmetric = []uint8{uint8(config.DefaultCipher)}
-	}
-
-	e.Subkeys = make([]Subkey, 1)
-	e.Subkeys[0] = Subkey{
-		PublicKey:  packet.NewRSAPublicKey(currentTime, &encryptingPriv.PublicKey),
-		PrivateKey: packet.NewRSAPrivateKey(currentTime, encryptingPriv),
-		Sig: &packet.Signature{
-			CreationTime:              currentTime,
-			SigType:                   packet.SigTypeSubkeyBinding,
-			PubKeyAlgo:                packet.PubKeyAlgoRSA,
-			Hash:                      config.Hash(),
-			FlagsValid:                true,
-			FlagEncryptStorage:        true,
-			FlagEncryptCommunications: true,
-			IssuerKeyId:               &e.PrimaryKey.KeyId,
-		},
-	}
-	e.Subkeys[0].PublicKey.IsSubkey = true
-	e.Subkeys[0].PrivateKey.IsSubkey = true
-
-	return e, nil
-}
-
-// SerializePrivate serializes an Entity, including private key material, to
-// the given Writer. For now, it must only be used on an Entity returned from
-// NewEntity.
-// If config is nil, sensible defaults will be used.
-func (e *Entity) SerializePrivate(w io.Writer, config *packet.Config) (err error) {
-	err = e.PrivateKey.Serialize(w)
-	if err != nil {
-		return
-	}
-	for _, ident := range e.Identities {
-		err = ident.UserId.Serialize(w)
-		if err != nil {
-			return
-		}
-		err = ident.SelfSignature.SignUserId(ident.UserId.Id, e.PrimaryKey, e.PrivateKey, config)
-		if err != nil {
-			return
-		}
-		err = ident.SelfSignature.Serialize(w)
-		if err != nil {
-			return
-		}
-	}
-	for _, subkey := range e.Subkeys {
-		err = subkey.PrivateKey.Serialize(w)
-		if err != nil {
-			return
-		}
-		err = subkey.Sig.SignKey(subkey.PublicKey, e.PrivateKey, config)
-		if err != nil {
-			return
-		}
-		err = subkey.Sig.Serialize(w)
-		if err != nil {
-			return
-		}
-	}
-	return nil
-}
-
-// Serialize writes the public part of the given Entity to w. (No private
-// key material will be output).
-func (e *Entity) Serialize(w io.Writer) error {
-	err := e.PrimaryKey.Serialize(w)
-	if err != nil {
-		return err
-	}
-	for _, ident := range e.Identities {
-		err = ident.UserId.Serialize(w)
-		if err != nil {
-			return err
-		}
-		err = ident.SelfSignature.Serialize(w)
-		if err != nil {
-			return err
-		}
-		for _, sig := range ident.Signatures {
-			err = sig.Serialize(w)
-			if err != nil {
-				return err
-			}
-		}
-	}
-	for _, subkey := range e.Subkeys {
-		err = subkey.PublicKey.Serialize(w)
-		if err != nil {
-			return err
-		}
-		err = subkey.Sig.Serialize(w)
-		if err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// SignIdentity adds a signature to e, from signer, attesting that identity is
-// associated with e. The provided identity must already be an element of
-// e.Identities and the private key of signer must have been decrypted if
-// necessary.
-// If config is nil, sensible defaults will be used.
-func (e *Entity) SignIdentity(identity string, signer *Entity, config *packet.Config) error {
-	if signer.PrivateKey == nil {
-		return errors.InvalidArgumentError("signing Entity must have a private key")
-	}
-	if signer.PrivateKey.Encrypted {
-		return errors.InvalidArgumentError("signing Entity's private key must be decrypted")
-	}
-	ident, ok := e.Identities[identity]
-	if !ok {
-		return errors.InvalidArgumentError("given identity string not found in Entity")
-	}
-
-	sig := &packet.Signature{
-		SigType:      packet.SigTypeGenericCert,
-		PubKeyAlgo:   signer.PrivateKey.PubKeyAlgo,
-		Hash:         config.Hash(),
-		CreationTime: config.Now(),
-		IssuerKeyId:  &signer.PrivateKey.KeyId,
-	}
-	if err := sig.SignUserId(identity, e.PrimaryKey, signer.PrivateKey, config); err != nil {
-		return err
-	}
-	ident.Signatures = append(ident.Signatures, sig)
-	return nil
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/compressed.go b/vendor/golang.org/x/crypto/openpgp/packet/compressed.go
deleted file mode 100644
index e8f0b5ca..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/compressed.go
+++ /dev/null
@@ -1,123 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"compress/bzip2"
-	"compress/flate"
-	"compress/zlib"
-	"golang.org/x/crypto/openpgp/errors"
-	"io"
-	"strconv"
-)
-
-// Compressed represents a compressed OpenPGP packet. The decompressed contents
-// will contain more OpenPGP packets. See RFC 4880, section 5.6.
-type Compressed struct {
-	Body io.Reader
-}
-
-const (
-	NoCompression      = flate.NoCompression
-	BestSpeed          = flate.BestSpeed
-	BestCompression    = flate.BestCompression
-	DefaultCompression = flate.DefaultCompression
-)
-
-// CompressionConfig contains compressor configuration settings.
-type CompressionConfig struct {
-	// Level is the compression level to use. It must be set to
-	// between -1 and 9, with -1 causing the compressor to use the
-	// default compression level, 0 causing the compressor to use
-	// no compression and 1 to 9 representing increasing (better,
-	// slower) compression levels. If Level is less than -1 or
-	// more then 9, a non-nil error will be returned during
-	// encryption. See the constants above for convenient common
-	// settings for Level.
-	Level int
-}
-
-func (c *Compressed) parse(r io.Reader) error {
-	var buf [1]byte
-	_, err := readFull(r, buf[:])
-	if err != nil {
-		return err
-	}
-
-	switch buf[0] {
-	case 1:
-		c.Body = flate.NewReader(r)
-	case 2:
-		c.Body, err = zlib.NewReader(r)
-	case 3:
-		c.Body = bzip2.NewReader(r)
-	default:
-		err = errors.UnsupportedError("unknown compression algorithm: " + strconv.Itoa(int(buf[0])))
-	}
-
-	return err
-}
-
-// compressedWriterCloser represents the serialized compression stream
-// header and the compressor. Its Close() method ensures that both the
-// compressor and serialized stream header are closed. Its Write()
-// method writes to the compressor.
-type compressedWriteCloser struct {
-	sh io.Closer      // Stream Header
-	c  io.WriteCloser // Compressor
-}
-
-func (cwc compressedWriteCloser) Write(p []byte) (int, error) {
-	return cwc.c.Write(p)
-}
-
-func (cwc compressedWriteCloser) Close() (err error) {
-	err = cwc.c.Close()
-	if err != nil {
-		return err
-	}
-
-	return cwc.sh.Close()
-}
-
-// SerializeCompressed serializes a compressed data packet to w and
-// returns a WriteCloser to which the literal data packets themselves
-// can be written and which MUST be closed on completion. If cc is
-// nil, sensible defaults will be used to configure the compression
-// algorithm.
-func SerializeCompressed(w io.WriteCloser, algo CompressionAlgo, cc *CompressionConfig) (literaldata io.WriteCloser, err error) {
-	compressed, err := serializeStreamHeader(w, packetTypeCompressed)
-	if err != nil {
-		return
-	}
-
-	_, err = compressed.Write([]byte{uint8(algo)})
-	if err != nil {
-		return
-	}
-
-	level := DefaultCompression
-	if cc != nil {
-		level = cc.Level
-	}
-
-	var compressor io.WriteCloser
-	switch algo {
-	case CompressionZIP:
-		compressor, err = flate.NewWriter(compressed, level)
-	case CompressionZLIB:
-		compressor, err = zlib.NewWriterLevel(compressed, level)
-	default:
-		s := strconv.Itoa(int(algo))
-		err = errors.UnsupportedError("Unsupported compression algorithm: " + s)
-	}
-	if err != nil {
-		return
-	}
-
-	literaldata = compressedWriteCloser{compressed, compressor}
-
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/config.go b/vendor/golang.org/x/crypto/openpgp/packet/config.go
deleted file mode 100644
index c76eecc9..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/config.go
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"crypto"
-	"crypto/rand"
-	"io"
-	"time"
-)
-
-// Config collects a number of parameters along with sensible defaults.
-// A nil *Config is valid and results in all default values.
-type Config struct {
-	// Rand provides the source of entropy.
-	// If nil, the crypto/rand Reader is used.
-	Rand io.Reader
-	// DefaultHash is the default hash function to be used.
-	// If zero, SHA-256 is used.
-	DefaultHash crypto.Hash
-	// DefaultCipher is the cipher to be used.
-	// If zero, AES-128 is used.
-	DefaultCipher CipherFunction
-	// Time returns the current time as the number of seconds since the
-	// epoch. If Time is nil, time.Now is used.
-	Time func() time.Time
-	// DefaultCompressionAlgo is the compression algorithm to be
-	// applied to the plaintext before encryption. If zero, no
-	// compression is done.
-	DefaultCompressionAlgo CompressionAlgo
-	// CompressionConfig configures the compression settings.
-	CompressionConfig *CompressionConfig
-	// S2KCount is only used for symmetric encryption. It
-	// determines the strength of the passphrase stretching when
-	// the said passphrase is hashed to produce a key. S2KCount
-	// should be between 1024 and 65011712, inclusive. If Config
-	// is nil or S2KCount is 0, the value 65536 used. Not all
-	// values in the above range can be represented. S2KCount will
-	// be rounded up to the next representable value if it cannot
-	// be encoded exactly. When set, it is strongly encrouraged to
-	// use a value that is at least 65536. See RFC 4880 Section
-	// 3.7.1.3.
-	S2KCount int
-	// RSABits is the number of bits in new RSA keys made with NewEntity.
-	// If zero, then 2048 bit keys are created.
-	RSABits int
-}
-
-func (c *Config) Random() io.Reader {
-	if c == nil || c.Rand == nil {
-		return rand.Reader
-	}
-	return c.Rand
-}
-
-func (c *Config) Hash() crypto.Hash {
-	if c == nil || uint(c.DefaultHash) == 0 {
-		return crypto.SHA256
-	}
-	return c.DefaultHash
-}
-
-func (c *Config) Cipher() CipherFunction {
-	if c == nil || uint8(c.DefaultCipher) == 0 {
-		return CipherAES128
-	}
-	return c.DefaultCipher
-}
-
-func (c *Config) Now() time.Time {
-	if c == nil || c.Time == nil {
-		return time.Now()
-	}
-	return c.Time()
-}
-
-func (c *Config) Compression() CompressionAlgo {
-	if c == nil {
-		return CompressionNone
-	}
-	return c.DefaultCompressionAlgo
-}
-
-func (c *Config) PasswordHashIterations() int {
-	if c == nil || c.S2KCount == 0 {
-		return 0
-	}
-	return c.S2KCount
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go b/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go
deleted file mode 100644
index 266840d0..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/encrypted_key.go
+++ /dev/null
@@ -1,199 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"crypto/rsa"
-	"encoding/binary"
-	"io"
-	"math/big"
-	"strconv"
-
-	"golang.org/x/crypto/openpgp/elgamal"
-	"golang.org/x/crypto/openpgp/errors"
-)
-
-const encryptedKeyVersion = 3
-
-// EncryptedKey represents a public-key encrypted session key. See RFC 4880,
-// section 5.1.
-type EncryptedKey struct {
-	KeyId      uint64
-	Algo       PublicKeyAlgorithm
-	CipherFunc CipherFunction // only valid after a successful Decrypt
-	Key        []byte         // only valid after a successful Decrypt
-
-	encryptedMPI1, encryptedMPI2 parsedMPI
-}
-
-func (e *EncryptedKey) parse(r io.Reader) (err error) {
-	var buf [10]byte
-	_, err = readFull(r, buf[:])
-	if err != nil {
-		return
-	}
-	if buf[0] != encryptedKeyVersion {
-		return errors.UnsupportedError("unknown EncryptedKey version " + strconv.Itoa(int(buf[0])))
-	}
-	e.KeyId = binary.BigEndian.Uint64(buf[1:9])
-	e.Algo = PublicKeyAlgorithm(buf[9])
-	switch e.Algo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
-		e.encryptedMPI1.bytes, e.encryptedMPI1.bitLength, err = readMPI(r)
-	case PubKeyAlgoElGamal:
-		e.encryptedMPI1.bytes, e.encryptedMPI1.bitLength, err = readMPI(r)
-		if err != nil {
-			return
-		}
-		e.encryptedMPI2.bytes, e.encryptedMPI2.bitLength, err = readMPI(r)
-	}
-	_, err = consumeAll(r)
-	return
-}
-
-func checksumKeyMaterial(key []byte) uint16 {
-	var checksum uint16
-	for _, v := range key {
-		checksum += uint16(v)
-	}
-	return checksum
-}
-
-// Decrypt decrypts an encrypted session key with the given private key. The
-// private key must have been decrypted first.
-// If config is nil, sensible defaults will be used.
-func (e *EncryptedKey) Decrypt(priv *PrivateKey, config *Config) error {
-	var err error
-	var b []byte
-
-	// TODO(agl): use session key decryption routines here to avoid
-	// padding oracle attacks.
-	switch priv.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
-		b, err = rsa.DecryptPKCS1v15(config.Random(), priv.PrivateKey.(*rsa.PrivateKey), e.encryptedMPI1.bytes)
-	case PubKeyAlgoElGamal:
-		c1 := new(big.Int).SetBytes(e.encryptedMPI1.bytes)
-		c2 := new(big.Int).SetBytes(e.encryptedMPI2.bytes)
-		b, err = elgamal.Decrypt(priv.PrivateKey.(*elgamal.PrivateKey), c1, c2)
-	default:
-		err = errors.InvalidArgumentError("cannot decrypted encrypted session key with private key of type " + strconv.Itoa(int(priv.PubKeyAlgo)))
-	}
-
-	if err != nil {
-		return err
-	}
-
-	e.CipherFunc = CipherFunction(b[0])
-	e.Key = b[1 : len(b)-2]
-	expectedChecksum := uint16(b[len(b)-2])<<8 | uint16(b[len(b)-1])
-	checksum := checksumKeyMaterial(e.Key)
-	if checksum != expectedChecksum {
-		return errors.StructuralError("EncryptedKey checksum incorrect")
-	}
-
-	return nil
-}
-
-// Serialize writes the encrypted key packet, e, to w.
-func (e *EncryptedKey) Serialize(w io.Writer) error {
-	var mpiLen int
-	switch e.Algo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
-		mpiLen = 2 + len(e.encryptedMPI1.bytes)
-	case PubKeyAlgoElGamal:
-		mpiLen = 2 + len(e.encryptedMPI1.bytes) + 2 + len(e.encryptedMPI2.bytes)
-	default:
-		return errors.InvalidArgumentError("don't know how to serialize encrypted key type " + strconv.Itoa(int(e.Algo)))
-	}
-
-	serializeHeader(w, packetTypeEncryptedKey, 1 /* version */ +8 /* key id */ +1 /* algo */ +mpiLen)
-
-	w.Write([]byte{encryptedKeyVersion})
-	binary.Write(w, binary.BigEndian, e.KeyId)
-	w.Write([]byte{byte(e.Algo)})
-
-	switch e.Algo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
-		writeMPIs(w, e.encryptedMPI1)
-	case PubKeyAlgoElGamal:
-		writeMPIs(w, e.encryptedMPI1, e.encryptedMPI2)
-	default:
-		panic("internal error")
-	}
-
-	return nil
-}
-
-// SerializeEncryptedKey serializes an encrypted key packet to w that contains
-// key, encrypted to pub.
-// If config is nil, sensible defaults will be used.
-func SerializeEncryptedKey(w io.Writer, pub *PublicKey, cipherFunc CipherFunction, key []byte, config *Config) error {
-	var buf [10]byte
-	buf[0] = encryptedKeyVersion
-	binary.BigEndian.PutUint64(buf[1:9], pub.KeyId)
-	buf[9] = byte(pub.PubKeyAlgo)
-
-	keyBlock := make([]byte, 1 /* cipher type */ +len(key)+2 /* checksum */)
-	keyBlock[0] = byte(cipherFunc)
-	copy(keyBlock[1:], key)
-	checksum := checksumKeyMaterial(key)
-	keyBlock[1+len(key)] = byte(checksum >> 8)
-	keyBlock[1+len(key)+1] = byte(checksum)
-
-	switch pub.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
-		return serializeEncryptedKeyRSA(w, config.Random(), buf, pub.PublicKey.(*rsa.PublicKey), keyBlock)
-	case PubKeyAlgoElGamal:
-		return serializeEncryptedKeyElGamal(w, config.Random(), buf, pub.PublicKey.(*elgamal.PublicKey), keyBlock)
-	case PubKeyAlgoDSA, PubKeyAlgoRSASignOnly:
-		return errors.InvalidArgumentError("cannot encrypt to public key of type " + strconv.Itoa(int(pub.PubKeyAlgo)))
-	}
-
-	return errors.UnsupportedError("encrypting a key to public key of type " + strconv.Itoa(int(pub.PubKeyAlgo)))
-}
-
-func serializeEncryptedKeyRSA(w io.Writer, rand io.Reader, header [10]byte, pub *rsa.PublicKey, keyBlock []byte) error {
-	cipherText, err := rsa.EncryptPKCS1v15(rand, pub, keyBlock)
-	if err != nil {
-		return errors.InvalidArgumentError("RSA encryption failed: " + err.Error())
-	}
-
-	packetLen := 10 /* header length */ + 2 /* mpi size */ + len(cipherText)
-
-	err = serializeHeader(w, packetTypeEncryptedKey, packetLen)
-	if err != nil {
-		return err
-	}
-	_, err = w.Write(header[:])
-	if err != nil {
-		return err
-	}
-	return writeMPI(w, 8*uint16(len(cipherText)), cipherText)
-}
-
-func serializeEncryptedKeyElGamal(w io.Writer, rand io.Reader, header [10]byte, pub *elgamal.PublicKey, keyBlock []byte) error {
-	c1, c2, err := elgamal.Encrypt(rand, pub, keyBlock)
-	if err != nil {
-		return errors.InvalidArgumentError("ElGamal encryption failed: " + err.Error())
-	}
-
-	packetLen := 10 /* header length */
-	packetLen += 2 /* mpi size */ + (c1.BitLen()+7)/8
-	packetLen += 2 /* mpi size */ + (c2.BitLen()+7)/8
-
-	err = serializeHeader(w, packetTypeEncryptedKey, packetLen)
-	if err != nil {
-		return err
-	}
-	_, err = w.Write(header[:])
-	if err != nil {
-		return err
-	}
-	err = writeBig(w, c1)
-	if err != nil {
-		return err
-	}
-	return writeBig(w, c2)
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/literal.go b/vendor/golang.org/x/crypto/openpgp/packet/literal.go
deleted file mode 100644
index 1a9ec6e5..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/literal.go
+++ /dev/null
@@ -1,89 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"encoding/binary"
-	"io"
-)
-
-// LiteralData represents an encrypted file. See RFC 4880, section 5.9.
-type LiteralData struct {
-	IsBinary bool
-	FileName string
-	Time     uint32 // Unix epoch time. Either creation time or modification time. 0 means undefined.
-	Body     io.Reader
-}
-
-// ForEyesOnly returns whether the contents of the LiteralData have been marked
-// as especially sensitive.
-func (l *LiteralData) ForEyesOnly() bool {
-	return l.FileName == "_CONSOLE"
-}
-
-func (l *LiteralData) parse(r io.Reader) (err error) {
-	var buf [256]byte
-
-	_, err = readFull(r, buf[:2])
-	if err != nil {
-		return
-	}
-
-	l.IsBinary = buf[0] == 'b'
-	fileNameLen := int(buf[1])
-
-	_, err = readFull(r, buf[:fileNameLen])
-	if err != nil {
-		return
-	}
-
-	l.FileName = string(buf[:fileNameLen])
-
-	_, err = readFull(r, buf[:4])
-	if err != nil {
-		return
-	}
-
-	l.Time = binary.BigEndian.Uint32(buf[:4])
-	l.Body = r
-	return
-}
-
-// SerializeLiteral serializes a literal data packet to w and returns a
-// WriteCloser to which the data itself can be written and which MUST be closed
-// on completion. The fileName is truncated to 255 bytes.
-func SerializeLiteral(w io.WriteCloser, isBinary bool, fileName string, time uint32) (plaintext io.WriteCloser, err error) {
-	var buf [4]byte
-	buf[0] = 't'
-	if isBinary {
-		buf[0] = 'b'
-	}
-	if len(fileName) > 255 {
-		fileName = fileName[:255]
-	}
-	buf[1] = byte(len(fileName))
-
-	inner, err := serializeStreamHeader(w, packetTypeLiteralData)
-	if err != nil {
-		return
-	}
-
-	_, err = inner.Write(buf[:2])
-	if err != nil {
-		return
-	}
-	_, err = inner.Write([]byte(fileName))
-	if err != nil {
-		return
-	}
-	binary.BigEndian.PutUint32(buf[:], time)
-	_, err = inner.Write(buf[:])
-	if err != nil {
-		return
-	}
-
-	plaintext = inner
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/ocfb.go b/vendor/golang.org/x/crypto/openpgp/packet/ocfb.go
deleted file mode 100644
index ce2a33a5..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/ocfb.go
+++ /dev/null
@@ -1,143 +0,0 @@
-// Copyright 2010 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// OpenPGP CFB Mode. http://tools.ietf.org/html/rfc4880#section-13.9
-
-package packet
-
-import (
-	"crypto/cipher"
-)
-
-type ocfbEncrypter struct {
-	b       cipher.Block
-	fre     []byte
-	outUsed int
-}
-
-// An OCFBResyncOption determines if the "resynchronization step" of OCFB is
-// performed.
-type OCFBResyncOption bool
-
-const (
-	OCFBResync   OCFBResyncOption = true
-	OCFBNoResync OCFBResyncOption = false
-)
-
-// NewOCFBEncrypter returns a cipher.Stream which encrypts data with OpenPGP's
-// cipher feedback mode using the given cipher.Block, and an initial amount of
-// ciphertext.  randData must be random bytes and be the same length as the
-// cipher.Block's block size. Resync determines if the "resynchronization step"
-// from RFC 4880, 13.9 step 7 is performed. Different parts of OpenPGP vary on
-// this point.
-func NewOCFBEncrypter(block cipher.Block, randData []byte, resync OCFBResyncOption) (cipher.Stream, []byte) {
-	blockSize := block.BlockSize()
-	if len(randData) != blockSize {
-		return nil, nil
-	}
-
-	x := &ocfbEncrypter{
-		b:       block,
-		fre:     make([]byte, blockSize),
-		outUsed: 0,
-	}
-	prefix := make([]byte, blockSize+2)
-
-	block.Encrypt(x.fre, x.fre)
-	for i := 0; i < blockSize; i++ {
-		prefix[i] = randData[i] ^ x.fre[i]
-	}
-
-	block.Encrypt(x.fre, prefix[:blockSize])
-	prefix[blockSize] = x.fre[0] ^ randData[blockSize-2]
-	prefix[blockSize+1] = x.fre[1] ^ randData[blockSize-1]
-
-	if resync {
-		block.Encrypt(x.fre, prefix[2:])
-	} else {
-		x.fre[0] = prefix[blockSize]
-		x.fre[1] = prefix[blockSize+1]
-		x.outUsed = 2
-	}
-	return x, prefix
-}
-
-func (x *ocfbEncrypter) XORKeyStream(dst, src []byte) {
-	for i := 0; i < len(src); i++ {
-		if x.outUsed == len(x.fre) {
-			x.b.Encrypt(x.fre, x.fre)
-			x.outUsed = 0
-		}
-
-		x.fre[x.outUsed] ^= src[i]
-		dst[i] = x.fre[x.outUsed]
-		x.outUsed++
-	}
-}
-
-type ocfbDecrypter struct {
-	b       cipher.Block
-	fre     []byte
-	outUsed int
-}
-
-// NewOCFBDecrypter returns a cipher.Stream which decrypts data with OpenPGP's
-// cipher feedback mode using the given cipher.Block. Prefix must be the first
-// blockSize + 2 bytes of the ciphertext, where blockSize is the cipher.Block's
-// block size. If an incorrect key is detected then nil is returned. On
-// successful exit, blockSize+2 bytes of decrypted data are written into
-// prefix. Resync determines if the "resynchronization step" from RFC 4880,
-// 13.9 step 7 is performed. Different parts of OpenPGP vary on this point.
-func NewOCFBDecrypter(block cipher.Block, prefix []byte, resync OCFBResyncOption) cipher.Stream {
-	blockSize := block.BlockSize()
-	if len(prefix) != blockSize+2 {
-		return nil
-	}
-
-	x := &ocfbDecrypter{
-		b:       block,
-		fre:     make([]byte, blockSize),
-		outUsed: 0,
-	}
-	prefixCopy := make([]byte, len(prefix))
-	copy(prefixCopy, prefix)
-
-	block.Encrypt(x.fre, x.fre)
-	for i := 0; i < blockSize; i++ {
-		prefixCopy[i] ^= x.fre[i]
-	}
-
-	block.Encrypt(x.fre, prefix[:blockSize])
-	prefixCopy[blockSize] ^= x.fre[0]
-	prefixCopy[blockSize+1] ^= x.fre[1]
-
-	if prefixCopy[blockSize-2] != prefixCopy[blockSize] ||
-		prefixCopy[blockSize-1] != prefixCopy[blockSize+1] {
-		return nil
-	}
-
-	if resync {
-		block.Encrypt(x.fre, prefix[2:])
-	} else {
-		x.fre[0] = prefix[blockSize]
-		x.fre[1] = prefix[blockSize+1]
-		x.outUsed = 2
-	}
-	copy(prefix, prefixCopy)
-	return x
-}
-
-func (x *ocfbDecrypter) XORKeyStream(dst, src []byte) {
-	for i := 0; i < len(src); i++ {
-		if x.outUsed == len(x.fre) {
-			x.b.Encrypt(x.fre, x.fre)
-			x.outUsed = 0
-		}
-
-		c := src[i]
-		dst[i] = x.fre[x.outUsed] ^ src[i]
-		x.fre[x.outUsed] = c
-		x.outUsed++
-	}
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go b/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go
deleted file mode 100644
index 17135033..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/one_pass_signature.go
+++ /dev/null
@@ -1,73 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"crypto"
-	"encoding/binary"
-	"golang.org/x/crypto/openpgp/errors"
-	"golang.org/x/crypto/openpgp/s2k"
-	"io"
-	"strconv"
-)
-
-// OnePassSignature represents a one-pass signature packet. See RFC 4880,
-// section 5.4.
-type OnePassSignature struct {
-	SigType    SignatureType
-	Hash       crypto.Hash
-	PubKeyAlgo PublicKeyAlgorithm
-	KeyId      uint64
-	IsLast     bool
-}
-
-const onePassSignatureVersion = 3
-
-func (ops *OnePassSignature) parse(r io.Reader) (err error) {
-	var buf [13]byte
-
-	_, err = readFull(r, buf[:])
-	if err != nil {
-		return
-	}
-	if buf[0] != onePassSignatureVersion {
-		err = errors.UnsupportedError("one-pass-signature packet version " + strconv.Itoa(int(buf[0])))
-	}
-
-	var ok bool
-	ops.Hash, ok = s2k.HashIdToHash(buf[2])
-	if !ok {
-		return errors.UnsupportedError("hash function: " + strconv.Itoa(int(buf[2])))
-	}
-
-	ops.SigType = SignatureType(buf[1])
-	ops.PubKeyAlgo = PublicKeyAlgorithm(buf[3])
-	ops.KeyId = binary.BigEndian.Uint64(buf[4:12])
-	ops.IsLast = buf[12] != 0
-	return
-}
-
-// Serialize marshals the given OnePassSignature to w.
-func (ops *OnePassSignature) Serialize(w io.Writer) error {
-	var buf [13]byte
-	buf[0] = onePassSignatureVersion
-	buf[1] = uint8(ops.SigType)
-	var ok bool
-	buf[2], ok = s2k.HashToHashId(ops.Hash)
-	if !ok {
-		return errors.UnsupportedError("hash type: " + strconv.Itoa(int(ops.Hash)))
-	}
-	buf[3] = uint8(ops.PubKeyAlgo)
-	binary.BigEndian.PutUint64(buf[4:12], ops.KeyId)
-	if ops.IsLast {
-		buf[12] = 1
-	}
-
-	if err := serializeHeader(w, packetTypeOnePassSignature, len(buf)); err != nil {
-		return err
-	}
-	_, err := w.Write(buf[:])
-	return err
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/opaque.go b/vendor/golang.org/x/crypto/openpgp/packet/opaque.go
deleted file mode 100644
index 456d807f..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/opaque.go
+++ /dev/null
@@ -1,162 +0,0 @@
-// Copyright 2012 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"bytes"
-	"io"
-	"io/ioutil"
-
-	"golang.org/x/crypto/openpgp/errors"
-)
-
-// OpaquePacket represents an OpenPGP packet as raw, unparsed data. This is
-// useful for splitting and storing the original packet contents separately,
-// handling unsupported packet types or accessing parts of the packet not yet
-// implemented by this package.
-type OpaquePacket struct {
-	// Packet type
-	Tag uint8
-	// Reason why the packet was parsed opaquely
-	Reason error
-	// Binary contents of the packet data
-	Contents []byte
-}
-
-func (op *OpaquePacket) parse(r io.Reader) (err error) {
-	op.Contents, err = ioutil.ReadAll(r)
-	return
-}
-
-// Serialize marshals the packet to a writer in its original form, including
-// the packet header.
-func (op *OpaquePacket) Serialize(w io.Writer) (err error) {
-	err = serializeHeader(w, packetType(op.Tag), len(op.Contents))
-	if err == nil {
-		_, err = w.Write(op.Contents)
-	}
-	return
-}
-
-// Parse attempts to parse the opaque contents into a structure supported by
-// this package. If the packet is not known then the result will be another
-// OpaquePacket.
-func (op *OpaquePacket) Parse() (p Packet, err error) {
-	hdr := bytes.NewBuffer(nil)
-	err = serializeHeader(hdr, packetType(op.Tag), len(op.Contents))
-	if err != nil {
-		op.Reason = err
-		return op, err
-	}
-	p, err = Read(io.MultiReader(hdr, bytes.NewBuffer(op.Contents)))
-	if err != nil {
-		op.Reason = err
-		p = op
-	}
-	return
-}
-
-// OpaqueReader reads OpaquePackets from an io.Reader.
-type OpaqueReader struct {
-	r io.Reader
-}
-
-func NewOpaqueReader(r io.Reader) *OpaqueReader {
-	return &OpaqueReader{r: r}
-}
-
-// Read the next OpaquePacket.
-func (or *OpaqueReader) Next() (op *OpaquePacket, err error) {
-	tag, _, contents, err := readHeader(or.r)
-	if err != nil {
-		return
-	}
-	op = &OpaquePacket{Tag: uint8(tag), Reason: err}
-	err = op.parse(contents)
-	if err != nil {
-		consumeAll(contents)
-	}
-	return
-}
-
-// OpaqueSubpacket represents an unparsed OpenPGP subpacket,
-// as found in signature and user attribute packets.
-type OpaqueSubpacket struct {
-	SubType  uint8
-	Contents []byte
-}
-
-// OpaqueSubpackets extracts opaque, unparsed OpenPGP subpackets from
-// their byte representation.
-func OpaqueSubpackets(contents []byte) (result []*OpaqueSubpacket, err error) {
-	var (
-		subHeaderLen int
-		subPacket    *OpaqueSubpacket
-	)
-	for len(contents) > 0 {
-		subHeaderLen, subPacket, err = nextSubpacket(contents)
-		if err != nil {
-			break
-		}
-		result = append(result, subPacket)
-		contents = contents[subHeaderLen+len(subPacket.Contents):]
-	}
-	return
-}
-
-func nextSubpacket(contents []byte) (subHeaderLen int, subPacket *OpaqueSubpacket, err error) {
-	// RFC 4880, section 5.2.3.1
-	var subLen uint32
-	if len(contents) < 1 {
-		goto Truncated
-	}
-	subPacket = &OpaqueSubpacket{}
-	switch {
-	case contents[0] < 192:
-		subHeaderLen = 2 // 1 length byte, 1 subtype byte
-		if len(contents) < subHeaderLen {
-			goto Truncated
-		}
-		subLen = uint32(contents[0])
-		contents = contents[1:]
-	case contents[0] < 255:
-		subHeaderLen = 3 // 2 length bytes, 1 subtype
-		if len(contents) < subHeaderLen {
-			goto Truncated
-		}
-		subLen = uint32(contents[0]-192)<<8 + uint32(contents[1]) + 192
-		contents = contents[2:]
-	default:
-		subHeaderLen = 6 // 5 length bytes, 1 subtype
-		if len(contents) < subHeaderLen {
-			goto Truncated
-		}
-		subLen = uint32(contents[1])<<24 |
-			uint32(contents[2])<<16 |
-			uint32(contents[3])<<8 |
-			uint32(contents[4])
-		contents = contents[5:]
-	}
-	if subLen > uint32(len(contents)) || subLen == 0 {
-		goto Truncated
-	}
-	subPacket.SubType = contents[0]
-	subPacket.Contents = contents[1:subLen]
-	return
-Truncated:
-	err = errors.StructuralError("subpacket truncated")
-	return
-}
-
-func (osp *OpaqueSubpacket) Serialize(w io.Writer) (err error) {
-	buf := make([]byte, 6)
-	n := serializeSubpacketLength(buf, len(osp.Contents)+1)
-	buf[n] = osp.SubType
-	if _, err = w.Write(buf[:n+1]); err != nil {
-		return
-	}
-	_, err = w.Write(osp.Contents)
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/packet.go b/vendor/golang.org/x/crypto/openpgp/packet/packet.go
deleted file mode 100644
index 3eded93f..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/packet.go
+++ /dev/null
@@ -1,537 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package packet implements parsing and serialization of OpenPGP packets, as
-// specified in RFC 4880.
-package packet // import "golang.org/x/crypto/openpgp/packet"
-
-import (
-	"bufio"
-	"crypto/aes"
-	"crypto/cipher"
-	"crypto/des"
-	"golang.org/x/crypto/cast5"
-	"golang.org/x/crypto/openpgp/errors"
-	"io"
-	"math/big"
-)
-
-// readFull is the same as io.ReadFull except that reading zero bytes returns
-// ErrUnexpectedEOF rather than EOF.
-func readFull(r io.Reader, buf []byte) (n int, err error) {
-	n, err = io.ReadFull(r, buf)
-	if err == io.EOF {
-		err = io.ErrUnexpectedEOF
-	}
-	return
-}
-
-// readLength reads an OpenPGP length from r. See RFC 4880, section 4.2.2.
-func readLength(r io.Reader) (length int64, isPartial bool, err error) {
-	var buf [4]byte
-	_, err = readFull(r, buf[:1])
-	if err != nil {
-		return
-	}
-	switch {
-	case buf[0] < 192:
-		length = int64(buf[0])
-	case buf[0] < 224:
-		length = int64(buf[0]-192) << 8
-		_, err = readFull(r, buf[0:1])
-		if err != nil {
-			return
-		}
-		length += int64(buf[0]) + 192
-	case buf[0] < 255:
-		length = int64(1) << (buf[0] & 0x1f)
-		isPartial = true
-	default:
-		_, err = readFull(r, buf[0:4])
-		if err != nil {
-			return
-		}
-		length = int64(buf[0])<<24 |
-			int64(buf[1])<<16 |
-			int64(buf[2])<<8 |
-			int64(buf[3])
-	}
-	return
-}
-
-// partialLengthReader wraps an io.Reader and handles OpenPGP partial lengths.
-// The continuation lengths are parsed and removed from the stream and EOF is
-// returned at the end of the packet. See RFC 4880, section 4.2.2.4.
-type partialLengthReader struct {
-	r         io.Reader
-	remaining int64
-	isPartial bool
-}
-
-func (r *partialLengthReader) Read(p []byte) (n int, err error) {
-	for r.remaining == 0 {
-		if !r.isPartial {
-			return 0, io.EOF
-		}
-		r.remaining, r.isPartial, err = readLength(r.r)
-		if err != nil {
-			return 0, err
-		}
-	}
-
-	toRead := int64(len(p))
-	if toRead > r.remaining {
-		toRead = r.remaining
-	}
-
-	n, err = r.r.Read(p[:int(toRead)])
-	r.remaining -= int64(n)
-	if n < int(toRead) && err == io.EOF {
-		err = io.ErrUnexpectedEOF
-	}
-	return
-}
-
-// partialLengthWriter writes a stream of data using OpenPGP partial lengths.
-// See RFC 4880, section 4.2.2.4.
-type partialLengthWriter struct {
-	w          io.WriteCloser
-	lengthByte [1]byte
-}
-
-func (w *partialLengthWriter) Write(p []byte) (n int, err error) {
-	for len(p) > 0 {
-		for power := uint(14); power < 32; power-- {
-			l := 1 << power
-			if len(p) >= l {
-				w.lengthByte[0] = 224 + uint8(power)
-				_, err = w.w.Write(w.lengthByte[:])
-				if err != nil {
-					return
-				}
-				var m int
-				m, err = w.w.Write(p[:l])
-				n += m
-				if err != nil {
-					return
-				}
-				p = p[l:]
-				break
-			}
-		}
-	}
-	return
-}
-
-func (w *partialLengthWriter) Close() error {
-	w.lengthByte[0] = 0
-	_, err := w.w.Write(w.lengthByte[:])
-	if err != nil {
-		return err
-	}
-	return w.w.Close()
-}
-
-// A spanReader is an io.LimitReader, but it returns ErrUnexpectedEOF if the
-// underlying Reader returns EOF before the limit has been reached.
-type spanReader struct {
-	r io.Reader
-	n int64
-}
-
-func (l *spanReader) Read(p []byte) (n int, err error) {
-	if l.n <= 0 {
-		return 0, io.EOF
-	}
-	if int64(len(p)) > l.n {
-		p = p[0:l.n]
-	}
-	n, err = l.r.Read(p)
-	l.n -= int64(n)
-	if l.n > 0 && err == io.EOF {
-		err = io.ErrUnexpectedEOF
-	}
-	return
-}
-
-// readHeader parses a packet header and returns an io.Reader which will return
-// the contents of the packet. See RFC 4880, section 4.2.
-func readHeader(r io.Reader) (tag packetType, length int64, contents io.Reader, err error) {
-	var buf [4]byte
-	_, err = io.ReadFull(r, buf[:1])
-	if err != nil {
-		return
-	}
-	if buf[0]&0x80 == 0 {
-		err = errors.StructuralError("tag byte does not have MSB set")
-		return
-	}
-	if buf[0]&0x40 == 0 {
-		// Old format packet
-		tag = packetType((buf[0] & 0x3f) >> 2)
-		lengthType := buf[0] & 3
-		if lengthType == 3 {
-			length = -1
-			contents = r
-			return
-		}
-		lengthBytes := 1 << lengthType
-		_, err = readFull(r, buf[0:lengthBytes])
-		if err != nil {
-			return
-		}
-		for i := 0; i < lengthBytes; i++ {
-			length <<= 8
-			length |= int64(buf[i])
-		}
-		contents = &spanReader{r, length}
-		return
-	}
-
-	// New format packet
-	tag = packetType(buf[0] & 0x3f)
-	length, isPartial, err := readLength(r)
-	if err != nil {
-		return
-	}
-	if isPartial {
-		contents = &partialLengthReader{
-			remaining: length,
-			isPartial: true,
-			r:         r,
-		}
-		length = -1
-	} else {
-		contents = &spanReader{r, length}
-	}
-	return
-}
-
-// serializeHeader writes an OpenPGP packet header to w. See RFC 4880, section
-// 4.2.
-func serializeHeader(w io.Writer, ptype packetType, length int) (err error) {
-	var buf [6]byte
-	var n int
-
-	buf[0] = 0x80 | 0x40 | byte(ptype)
-	if length < 192 {
-		buf[1] = byte(length)
-		n = 2
-	} else if length < 8384 {
-		length -= 192
-		buf[1] = 192 + byte(length>>8)
-		buf[2] = byte(length)
-		n = 3
-	} else {
-		buf[1] = 255
-		buf[2] = byte(length >> 24)
-		buf[3] = byte(length >> 16)
-		buf[4] = byte(length >> 8)
-		buf[5] = byte(length)
-		n = 6
-	}
-
-	_, err = w.Write(buf[:n])
-	return
-}
-
-// serializeStreamHeader writes an OpenPGP packet header to w where the
-// length of the packet is unknown. It returns a io.WriteCloser which can be
-// used to write the contents of the packet. See RFC 4880, section 4.2.
-func serializeStreamHeader(w io.WriteCloser, ptype packetType) (out io.WriteCloser, err error) {
-	var buf [1]byte
-	buf[0] = 0x80 | 0x40 | byte(ptype)
-	_, err = w.Write(buf[:])
-	if err != nil {
-		return
-	}
-	out = &partialLengthWriter{w: w}
-	return
-}
-
-// Packet represents an OpenPGP packet. Users are expected to try casting
-// instances of this interface to specific packet types.
-type Packet interface {
-	parse(io.Reader) error
-}
-
-// consumeAll reads from the given Reader until error, returning the number of
-// bytes read.
-func consumeAll(r io.Reader) (n int64, err error) {
-	var m int
-	var buf [1024]byte
-
-	for {
-		m, err = r.Read(buf[:])
-		n += int64(m)
-		if err == io.EOF {
-			err = nil
-			return
-		}
-		if err != nil {
-			return
-		}
-	}
-}
-
-// packetType represents the numeric ids of the different OpenPGP packet types. See
-// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-2
-type packetType uint8
-
-const (
-	packetTypeEncryptedKey              packetType = 1
-	packetTypeSignature                 packetType = 2
-	packetTypeSymmetricKeyEncrypted     packetType = 3
-	packetTypeOnePassSignature          packetType = 4
-	packetTypePrivateKey                packetType = 5
-	packetTypePublicKey                 packetType = 6
-	packetTypePrivateSubkey             packetType = 7
-	packetTypeCompressed                packetType = 8
-	packetTypeSymmetricallyEncrypted    packetType = 9
-	packetTypeLiteralData               packetType = 11
-	packetTypeUserId                    packetType = 13
-	packetTypePublicSubkey              packetType = 14
-	packetTypeUserAttribute             packetType = 17
-	packetTypeSymmetricallyEncryptedMDC packetType = 18
-)
-
-// peekVersion detects the version of a public key packet about to
-// be read. A bufio.Reader at the original position of the io.Reader
-// is returned.
-func peekVersion(r io.Reader) (bufr *bufio.Reader, ver byte, err error) {
-	bufr = bufio.NewReader(r)
-	var verBuf []byte
-	if verBuf, err = bufr.Peek(1); err != nil {
-		return
-	}
-	ver = verBuf[0]
-	return
-}
-
-// Read reads a single OpenPGP packet from the given io.Reader. If there is an
-// error parsing a packet, the whole packet is consumed from the input.
-func Read(r io.Reader) (p Packet, err error) {
-	tag, _, contents, err := readHeader(r)
-	if err != nil {
-		return
-	}
-
-	switch tag {
-	case packetTypeEncryptedKey:
-		p = new(EncryptedKey)
-	case packetTypeSignature:
-		var version byte
-		// Detect signature version
-		if contents, version, err = peekVersion(contents); err != nil {
-			return
-		}
-		if version < 4 {
-			p = new(SignatureV3)
-		} else {
-			p = new(Signature)
-		}
-	case packetTypeSymmetricKeyEncrypted:
-		p = new(SymmetricKeyEncrypted)
-	case packetTypeOnePassSignature:
-		p = new(OnePassSignature)
-	case packetTypePrivateKey, packetTypePrivateSubkey:
-		pk := new(PrivateKey)
-		if tag == packetTypePrivateSubkey {
-			pk.IsSubkey = true
-		}
-		p = pk
-	case packetTypePublicKey, packetTypePublicSubkey:
-		var version byte
-		if contents, version, err = peekVersion(contents); err != nil {
-			return
-		}
-		isSubkey := tag == packetTypePublicSubkey
-		if version < 4 {
-			p = &PublicKeyV3{IsSubkey: isSubkey}
-		} else {
-			p = &PublicKey{IsSubkey: isSubkey}
-		}
-	case packetTypeCompressed:
-		p = new(Compressed)
-	case packetTypeSymmetricallyEncrypted:
-		p = new(SymmetricallyEncrypted)
-	case packetTypeLiteralData:
-		p = new(LiteralData)
-	case packetTypeUserId:
-		p = new(UserId)
-	case packetTypeUserAttribute:
-		p = new(UserAttribute)
-	case packetTypeSymmetricallyEncryptedMDC:
-		se := new(SymmetricallyEncrypted)
-		se.MDC = true
-		p = se
-	default:
-		err = errors.UnknownPacketTypeError(tag)
-	}
-	if p != nil {
-		err = p.parse(contents)
-	}
-	if err != nil {
-		consumeAll(contents)
-	}
-	return
-}
-
-// SignatureType represents the different semantic meanings of an OpenPGP
-// signature. See RFC 4880, section 5.2.1.
-type SignatureType uint8
-
-const (
-	SigTypeBinary            SignatureType = 0
-	SigTypeText                            = 1
-	SigTypeGenericCert                     = 0x10
-	SigTypePersonaCert                     = 0x11
-	SigTypeCasualCert                      = 0x12
-	SigTypePositiveCert                    = 0x13
-	SigTypeSubkeyBinding                   = 0x18
-	SigTypePrimaryKeyBinding               = 0x19
-	SigTypeDirectSignature                 = 0x1F
-	SigTypeKeyRevocation                   = 0x20
-	SigTypeSubkeyRevocation                = 0x28
-)
-
-// PublicKeyAlgorithm represents the different public key system specified for
-// OpenPGP. See
-// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-12
-type PublicKeyAlgorithm uint8
-
-const (
-	PubKeyAlgoRSA            PublicKeyAlgorithm = 1
-	PubKeyAlgoRSAEncryptOnly PublicKeyAlgorithm = 2
-	PubKeyAlgoRSASignOnly    PublicKeyAlgorithm = 3
-	PubKeyAlgoElGamal        PublicKeyAlgorithm = 16
-	PubKeyAlgoDSA            PublicKeyAlgorithm = 17
-	// RFC 6637, Section 5.
-	PubKeyAlgoECDH  PublicKeyAlgorithm = 18
-	PubKeyAlgoECDSA PublicKeyAlgorithm = 19
-)
-
-// CanEncrypt returns true if it's possible to encrypt a message to a public
-// key of the given type.
-func (pka PublicKeyAlgorithm) CanEncrypt() bool {
-	switch pka {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoElGamal:
-		return true
-	}
-	return false
-}
-
-// CanSign returns true if it's possible for a public key of the given type to
-// sign a message.
-func (pka PublicKeyAlgorithm) CanSign() bool {
-	switch pka {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA, PubKeyAlgoECDSA:
-		return true
-	}
-	return false
-}
-
-// CipherFunction represents the different block ciphers specified for OpenPGP. See
-// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-13
-type CipherFunction uint8
-
-const (
-	Cipher3DES   CipherFunction = 2
-	CipherCAST5  CipherFunction = 3
-	CipherAES128 CipherFunction = 7
-	CipherAES192 CipherFunction = 8
-	CipherAES256 CipherFunction = 9
-)
-
-// KeySize returns the key size, in bytes, of cipher.
-func (cipher CipherFunction) KeySize() int {
-	switch cipher {
-	case Cipher3DES:
-		return 24
-	case CipherCAST5:
-		return cast5.KeySize
-	case CipherAES128:
-		return 16
-	case CipherAES192:
-		return 24
-	case CipherAES256:
-		return 32
-	}
-	return 0
-}
-
-// blockSize returns the block size, in bytes, of cipher.
-func (cipher CipherFunction) blockSize() int {
-	switch cipher {
-	case Cipher3DES:
-		return des.BlockSize
-	case CipherCAST5:
-		return 8
-	case CipherAES128, CipherAES192, CipherAES256:
-		return 16
-	}
-	return 0
-}
-
-// new returns a fresh instance of the given cipher.
-func (cipher CipherFunction) new(key []byte) (block cipher.Block) {
-	switch cipher {
-	case Cipher3DES:
-		block, _ = des.NewTripleDESCipher(key)
-	case CipherCAST5:
-		block, _ = cast5.NewCipher(key)
-	case CipherAES128, CipherAES192, CipherAES256:
-		block, _ = aes.NewCipher(key)
-	}
-	return
-}
-
-// readMPI reads a big integer from r. The bit length returned is the bit
-// length that was specified in r. This is preserved so that the integer can be
-// reserialized exactly.
-func readMPI(r io.Reader) (mpi []byte, bitLength uint16, err error) {
-	var buf [2]byte
-	_, err = readFull(r, buf[0:])
-	if err != nil {
-		return
-	}
-	bitLength = uint16(buf[0])<<8 | uint16(buf[1])
-	numBytes := (int(bitLength) + 7) / 8
-	mpi = make([]byte, numBytes)
-	_, err = readFull(r, mpi)
-	return
-}
-
-// mpiLength returns the length of the given *big.Int when serialized as an
-// MPI.
-func mpiLength(n *big.Int) (mpiLengthInBytes int) {
-	mpiLengthInBytes = 2 /* MPI length */
-	mpiLengthInBytes += (n.BitLen() + 7) / 8
-	return
-}
-
-// writeMPI serializes a big integer to w.
-func writeMPI(w io.Writer, bitLength uint16, mpiBytes []byte) (err error) {
-	_, err = w.Write([]byte{byte(bitLength >> 8), byte(bitLength)})
-	if err == nil {
-		_, err = w.Write(mpiBytes)
-	}
-	return
-}
-
-// writeBig serializes a *big.Int to w.
-func writeBig(w io.Writer, i *big.Int) error {
-	return writeMPI(w, uint16(i.BitLen()), i.Bytes())
-}
-
-// CompressionAlgo Represents the different compression algorithms
-// supported by OpenPGP (except for BZIP2, which is not currently
-// supported). See Section 9.3 of RFC 4880.
-type CompressionAlgo uint8
-
-const (
-	CompressionNone CompressionAlgo = 0
-	CompressionZIP  CompressionAlgo = 1
-	CompressionZLIB CompressionAlgo = 2
-)
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/private_key.go b/vendor/golang.org/x/crypto/openpgp/packet/private_key.go
deleted file mode 100644
index 34734cc6..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/private_key.go
+++ /dev/null
@@ -1,380 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"bytes"
-	"crypto"
-	"crypto/cipher"
-	"crypto/dsa"
-	"crypto/ecdsa"
-	"crypto/rsa"
-	"crypto/sha1"
-	"io"
-	"io/ioutil"
-	"math/big"
-	"strconv"
-	"time"
-
-	"golang.org/x/crypto/openpgp/elgamal"
-	"golang.org/x/crypto/openpgp/errors"
-	"golang.org/x/crypto/openpgp/s2k"
-)
-
-// PrivateKey represents a possibly encrypted private key. See RFC 4880,
-// section 5.5.3.
-type PrivateKey struct {
-	PublicKey
-	Encrypted     bool // if true then the private key is unavailable until Decrypt has been called.
-	encryptedData []byte
-	cipher        CipherFunction
-	s2k           func(out, in []byte)
-	PrivateKey    interface{} // An *{rsa|dsa|ecdsa}.PrivateKey or a crypto.Signer.
-	sha1Checksum  bool
-	iv            []byte
-}
-
-func NewRSAPrivateKey(currentTime time.Time, priv *rsa.PrivateKey) *PrivateKey {
-	pk := new(PrivateKey)
-	pk.PublicKey = *NewRSAPublicKey(currentTime, &priv.PublicKey)
-	pk.PrivateKey = priv
-	return pk
-}
-
-func NewDSAPrivateKey(currentTime time.Time, priv *dsa.PrivateKey) *PrivateKey {
-	pk := new(PrivateKey)
-	pk.PublicKey = *NewDSAPublicKey(currentTime, &priv.PublicKey)
-	pk.PrivateKey = priv
-	return pk
-}
-
-func NewElGamalPrivateKey(currentTime time.Time, priv *elgamal.PrivateKey) *PrivateKey {
-	pk := new(PrivateKey)
-	pk.PublicKey = *NewElGamalPublicKey(currentTime, &priv.PublicKey)
-	pk.PrivateKey = priv
-	return pk
-}
-
-func NewECDSAPrivateKey(currentTime time.Time, priv *ecdsa.PrivateKey) *PrivateKey {
-	pk := new(PrivateKey)
-	pk.PublicKey = *NewECDSAPublicKey(currentTime, &priv.PublicKey)
-	pk.PrivateKey = priv
-	return pk
-}
-
-// NewSignerPrivateKey creates a sign-only PrivateKey from a crypto.Signer that
-// implements RSA or ECDSA.
-func NewSignerPrivateKey(currentTime time.Time, signer crypto.Signer) *PrivateKey {
-	pk := new(PrivateKey)
-	switch pubkey := signer.Public().(type) {
-	case rsa.PublicKey:
-		pk.PublicKey = *NewRSAPublicKey(currentTime, &pubkey)
-		pk.PubKeyAlgo = PubKeyAlgoRSASignOnly
-	case ecdsa.PublicKey:
-		pk.PublicKey = *NewECDSAPublicKey(currentTime, &pubkey)
-	default:
-		panic("openpgp: unknown crypto.Signer type in NewSignerPrivateKey")
-	}
-	pk.PrivateKey = signer
-	return pk
-}
-
-func (pk *PrivateKey) parse(r io.Reader) (err error) {
-	err = (&pk.PublicKey).parse(r)
-	if err != nil {
-		return
-	}
-	var buf [1]byte
-	_, err = readFull(r, buf[:])
-	if err != nil {
-		return
-	}
-
-	s2kType := buf[0]
-
-	switch s2kType {
-	case 0:
-		pk.s2k = nil
-		pk.Encrypted = false
-	case 254, 255:
-		_, err = readFull(r, buf[:])
-		if err != nil {
-			return
-		}
-		pk.cipher = CipherFunction(buf[0])
-		pk.Encrypted = true
-		pk.s2k, err = s2k.Parse(r)
-		if err != nil {
-			return
-		}
-		if s2kType == 254 {
-			pk.sha1Checksum = true
-		}
-	default:
-		return errors.UnsupportedError("deprecated s2k function in private key")
-	}
-
-	if pk.Encrypted {
-		blockSize := pk.cipher.blockSize()
-		if blockSize == 0 {
-			return errors.UnsupportedError("unsupported cipher in private key: " + strconv.Itoa(int(pk.cipher)))
-		}
-		pk.iv = make([]byte, blockSize)
-		_, err = readFull(r, pk.iv)
-		if err != nil {
-			return
-		}
-	}
-
-	pk.encryptedData, err = ioutil.ReadAll(r)
-	if err != nil {
-		return
-	}
-
-	if !pk.Encrypted {
-		return pk.parsePrivateKey(pk.encryptedData)
-	}
-
-	return
-}
-
-func mod64kHash(d []byte) uint16 {
-	var h uint16
-	for _, b := range d {
-		h += uint16(b)
-	}
-	return h
-}
-
-func (pk *PrivateKey) Serialize(w io.Writer) (err error) {
-	// TODO(agl): support encrypted private keys
-	buf := bytes.NewBuffer(nil)
-	err = pk.PublicKey.serializeWithoutHeaders(buf)
-	if err != nil {
-		return
-	}
-	buf.WriteByte(0 /* no encryption */)
-
-	privateKeyBuf := bytes.NewBuffer(nil)
-
-	switch priv := pk.PrivateKey.(type) {
-	case *rsa.PrivateKey:
-		err = serializeRSAPrivateKey(privateKeyBuf, priv)
-	case *dsa.PrivateKey:
-		err = serializeDSAPrivateKey(privateKeyBuf, priv)
-	case *elgamal.PrivateKey:
-		err = serializeElGamalPrivateKey(privateKeyBuf, priv)
-	case *ecdsa.PrivateKey:
-		err = serializeECDSAPrivateKey(privateKeyBuf, priv)
-	default:
-		err = errors.InvalidArgumentError("unknown private key type")
-	}
-	if err != nil {
-		return
-	}
-
-	ptype := packetTypePrivateKey
-	contents := buf.Bytes()
-	privateKeyBytes := privateKeyBuf.Bytes()
-	if pk.IsSubkey {
-		ptype = packetTypePrivateSubkey
-	}
-	err = serializeHeader(w, ptype, len(contents)+len(privateKeyBytes)+2)
-	if err != nil {
-		return
-	}
-	_, err = w.Write(contents)
-	if err != nil {
-		return
-	}
-	_, err = w.Write(privateKeyBytes)
-	if err != nil {
-		return
-	}
-
-	checksum := mod64kHash(privateKeyBytes)
-	var checksumBytes [2]byte
-	checksumBytes[0] = byte(checksum >> 8)
-	checksumBytes[1] = byte(checksum)
-	_, err = w.Write(checksumBytes[:])
-
-	return
-}
-
-func serializeRSAPrivateKey(w io.Writer, priv *rsa.PrivateKey) error {
-	err := writeBig(w, priv.D)
-	if err != nil {
-		return err
-	}
-	err = writeBig(w, priv.Primes[1])
-	if err != nil {
-		return err
-	}
-	err = writeBig(w, priv.Primes[0])
-	if err != nil {
-		return err
-	}
-	return writeBig(w, priv.Precomputed.Qinv)
-}
-
-func serializeDSAPrivateKey(w io.Writer, priv *dsa.PrivateKey) error {
-	return writeBig(w, priv.X)
-}
-
-func serializeElGamalPrivateKey(w io.Writer, priv *elgamal.PrivateKey) error {
-	return writeBig(w, priv.X)
-}
-
-func serializeECDSAPrivateKey(w io.Writer, priv *ecdsa.PrivateKey) error {
-	return writeBig(w, priv.D)
-}
-
-// Decrypt decrypts an encrypted private key using a passphrase.
-func (pk *PrivateKey) Decrypt(passphrase []byte) error {
-	if !pk.Encrypted {
-		return nil
-	}
-
-	key := make([]byte, pk.cipher.KeySize())
-	pk.s2k(key, passphrase)
-	block := pk.cipher.new(key)
-	cfb := cipher.NewCFBDecrypter(block, pk.iv)
-
-	data := make([]byte, len(pk.encryptedData))
-	cfb.XORKeyStream(data, pk.encryptedData)
-
-	if pk.sha1Checksum {
-		if len(data) < sha1.Size {
-			return errors.StructuralError("truncated private key data")
-		}
-		h := sha1.New()
-		h.Write(data[:len(data)-sha1.Size])
-		sum := h.Sum(nil)
-		if !bytes.Equal(sum, data[len(data)-sha1.Size:]) {
-			return errors.StructuralError("private key checksum failure")
-		}
-		data = data[:len(data)-sha1.Size]
-	} else {
-		if len(data) < 2 {
-			return errors.StructuralError("truncated private key data")
-		}
-		var sum uint16
-		for i := 0; i < len(data)-2; i++ {
-			sum += uint16(data[i])
-		}
-		if data[len(data)-2] != uint8(sum>>8) ||
-			data[len(data)-1] != uint8(sum) {
-			return errors.StructuralError("private key checksum failure")
-		}
-		data = data[:len(data)-2]
-	}
-
-	return pk.parsePrivateKey(data)
-}
-
-func (pk *PrivateKey) parsePrivateKey(data []byte) (err error) {
-	switch pk.PublicKey.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoRSAEncryptOnly:
-		return pk.parseRSAPrivateKey(data)
-	case PubKeyAlgoDSA:
-		return pk.parseDSAPrivateKey(data)
-	case PubKeyAlgoElGamal:
-		return pk.parseElGamalPrivateKey(data)
-	case PubKeyAlgoECDSA:
-		return pk.parseECDSAPrivateKey(data)
-	}
-	panic("impossible")
-}
-
-func (pk *PrivateKey) parseRSAPrivateKey(data []byte) (err error) {
-	rsaPub := pk.PublicKey.PublicKey.(*rsa.PublicKey)
-	rsaPriv := new(rsa.PrivateKey)
-	rsaPriv.PublicKey = *rsaPub
-
-	buf := bytes.NewBuffer(data)
-	d, _, err := readMPI(buf)
-	if err != nil {
-		return
-	}
-	p, _, err := readMPI(buf)
-	if err != nil {
-		return
-	}
-	q, _, err := readMPI(buf)
-	if err != nil {
-		return
-	}
-
-	rsaPriv.D = new(big.Int).SetBytes(d)
-	rsaPriv.Primes = make([]*big.Int, 2)
-	rsaPriv.Primes[0] = new(big.Int).SetBytes(p)
-	rsaPriv.Primes[1] = new(big.Int).SetBytes(q)
-	if err := rsaPriv.Validate(); err != nil {
-		return err
-	}
-	rsaPriv.Precompute()
-	pk.PrivateKey = rsaPriv
-	pk.Encrypted = false
-	pk.encryptedData = nil
-
-	return nil
-}
-
-func (pk *PrivateKey) parseDSAPrivateKey(data []byte) (err error) {
-	dsaPub := pk.PublicKey.PublicKey.(*dsa.PublicKey)
-	dsaPriv := new(dsa.PrivateKey)
-	dsaPriv.PublicKey = *dsaPub
-
-	buf := bytes.NewBuffer(data)
-	x, _, err := readMPI(buf)
-	if err != nil {
-		return
-	}
-
-	dsaPriv.X = new(big.Int).SetBytes(x)
-	pk.PrivateKey = dsaPriv
-	pk.Encrypted = false
-	pk.encryptedData = nil
-
-	return nil
-}
-
-func (pk *PrivateKey) parseElGamalPrivateKey(data []byte) (err error) {
-	pub := pk.PublicKey.PublicKey.(*elgamal.PublicKey)
-	priv := new(elgamal.PrivateKey)
-	priv.PublicKey = *pub
-
-	buf := bytes.NewBuffer(data)
-	x, _, err := readMPI(buf)
-	if err != nil {
-		return
-	}
-
-	priv.X = new(big.Int).SetBytes(x)
-	pk.PrivateKey = priv
-	pk.Encrypted = false
-	pk.encryptedData = nil
-
-	return nil
-}
-
-func (pk *PrivateKey) parseECDSAPrivateKey(data []byte) (err error) {
-	ecdsaPub := pk.PublicKey.PublicKey.(*ecdsa.PublicKey)
-
-	buf := bytes.NewBuffer(data)
-	d, _, err := readMPI(buf)
-	if err != nil {
-		return
-	}
-
-	pk.PrivateKey = &ecdsa.PrivateKey{
-		PublicKey: *ecdsaPub,
-		D:         new(big.Int).SetBytes(d),
-	}
-	pk.Encrypted = false
-	pk.encryptedData = nil
-
-	return nil
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/public_key.go b/vendor/golang.org/x/crypto/openpgp/packet/public_key.go
deleted file mode 100644
index ead26233..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/public_key.go
+++ /dev/null
@@ -1,748 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"bytes"
-	"crypto"
-	"crypto/dsa"
-	"crypto/ecdsa"
-	"crypto/elliptic"
-	"crypto/rsa"
-	"crypto/sha1"
-	_ "crypto/sha256"
-	_ "crypto/sha512"
-	"encoding/binary"
-	"fmt"
-	"hash"
-	"io"
-	"math/big"
-	"strconv"
-	"time"
-
-	"golang.org/x/crypto/openpgp/elgamal"
-	"golang.org/x/crypto/openpgp/errors"
-)
-
-var (
-	// NIST curve P-256
-	oidCurveP256 []byte = []byte{0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x03, 0x01, 0x07}
-	// NIST curve P-384
-	oidCurveP384 []byte = []byte{0x2B, 0x81, 0x04, 0x00, 0x22}
-	// NIST curve P-521
-	oidCurveP521 []byte = []byte{0x2B, 0x81, 0x04, 0x00, 0x23}
-)
-
-const maxOIDLength = 8
-
-// ecdsaKey stores the algorithm-specific fields for ECDSA keys.
-// as defined in RFC 6637, Section 9.
-type ecdsaKey struct {
-	// oid contains the OID byte sequence identifying the elliptic curve used
-	oid []byte
-	// p contains the elliptic curve point that represents the public key
-	p parsedMPI
-}
-
-// parseOID reads the OID for the curve as defined in RFC 6637, Section 9.
-func parseOID(r io.Reader) (oid []byte, err error) {
-	buf := make([]byte, maxOIDLength)
-	if _, err = readFull(r, buf[:1]); err != nil {
-		return
-	}
-	oidLen := buf[0]
-	if int(oidLen) > len(buf) {
-		err = errors.UnsupportedError("invalid oid length: " + strconv.Itoa(int(oidLen)))
-		return
-	}
-	oid = buf[:oidLen]
-	_, err = readFull(r, oid)
-	return
-}
-
-func (f *ecdsaKey) parse(r io.Reader) (err error) {
-	if f.oid, err = parseOID(r); err != nil {
-		return err
-	}
-	f.p.bytes, f.p.bitLength, err = readMPI(r)
-	return
-}
-
-func (f *ecdsaKey) serialize(w io.Writer) (err error) {
-	buf := make([]byte, maxOIDLength+1)
-	buf[0] = byte(len(f.oid))
-	copy(buf[1:], f.oid)
-	if _, err = w.Write(buf[:len(f.oid)+1]); err != nil {
-		return
-	}
-	return writeMPIs(w, f.p)
-}
-
-func (f *ecdsaKey) newECDSA() (*ecdsa.PublicKey, error) {
-	var c elliptic.Curve
-	if bytes.Equal(f.oid, oidCurveP256) {
-		c = elliptic.P256()
-	} else if bytes.Equal(f.oid, oidCurveP384) {
-		c = elliptic.P384()
-	} else if bytes.Equal(f.oid, oidCurveP521) {
-		c = elliptic.P521()
-	} else {
-		return nil, errors.UnsupportedError(fmt.Sprintf("unsupported oid: %x", f.oid))
-	}
-	x, y := elliptic.Unmarshal(c, f.p.bytes)
-	if x == nil {
-		return nil, errors.UnsupportedError("failed to parse EC point")
-	}
-	return &ecdsa.PublicKey{Curve: c, X: x, Y: y}, nil
-}
-
-func (f *ecdsaKey) byteLen() int {
-	return 1 + len(f.oid) + 2 + len(f.p.bytes)
-}
-
-type kdfHashFunction byte
-type kdfAlgorithm byte
-
-// ecdhKdf stores key derivation function parameters
-// used for ECDH encryption. See RFC 6637, Section 9.
-type ecdhKdf struct {
-	KdfHash kdfHashFunction
-	KdfAlgo kdfAlgorithm
-}
-
-func (f *ecdhKdf) parse(r io.Reader) (err error) {
-	buf := make([]byte, 1)
-	if _, err = readFull(r, buf); err != nil {
-		return
-	}
-	kdfLen := int(buf[0])
-	if kdfLen < 3 {
-		return errors.UnsupportedError("Unsupported ECDH KDF length: " + strconv.Itoa(kdfLen))
-	}
-	buf = make([]byte, kdfLen)
-	if _, err = readFull(r, buf); err != nil {
-		return
-	}
-	reserved := int(buf[0])
-	f.KdfHash = kdfHashFunction(buf[1])
-	f.KdfAlgo = kdfAlgorithm(buf[2])
-	if reserved != 0x01 {
-		return errors.UnsupportedError("Unsupported KDF reserved field: " + strconv.Itoa(reserved))
-	}
-	return
-}
-
-func (f *ecdhKdf) serialize(w io.Writer) (err error) {
-	buf := make([]byte, 4)
-	// See RFC 6637, Section 9, Algorithm-Specific Fields for ECDH keys.
-	buf[0] = byte(0x03) // Length of the following fields
-	buf[1] = byte(0x01) // Reserved for future extensions, must be 1 for now
-	buf[2] = byte(f.KdfHash)
-	buf[3] = byte(f.KdfAlgo)
-	_, err = w.Write(buf[:])
-	return
-}
-
-func (f *ecdhKdf) byteLen() int {
-	return 4
-}
-
-// PublicKey represents an OpenPGP public key. See RFC 4880, section 5.5.2.
-type PublicKey struct {
-	CreationTime time.Time
-	PubKeyAlgo   PublicKeyAlgorithm
-	PublicKey    interface{} // *rsa.PublicKey, *dsa.PublicKey or *ecdsa.PublicKey
-	Fingerprint  [20]byte
-	KeyId        uint64
-	IsSubkey     bool
-
-	n, e, p, q, g, y parsedMPI
-
-	// RFC 6637 fields
-	ec   *ecdsaKey
-	ecdh *ecdhKdf
-}
-
-// signingKey provides a convenient abstraction over signature verification
-// for v3 and v4 public keys.
-type signingKey interface {
-	SerializeSignaturePrefix(io.Writer)
-	serializeWithoutHeaders(io.Writer) error
-}
-
-func fromBig(n *big.Int) parsedMPI {
-	return parsedMPI{
-		bytes:     n.Bytes(),
-		bitLength: uint16(n.BitLen()),
-	}
-}
-
-// NewRSAPublicKey returns a PublicKey that wraps the given rsa.PublicKey.
-func NewRSAPublicKey(creationTime time.Time, pub *rsa.PublicKey) *PublicKey {
-	pk := &PublicKey{
-		CreationTime: creationTime,
-		PubKeyAlgo:   PubKeyAlgoRSA,
-		PublicKey:    pub,
-		n:            fromBig(pub.N),
-		e:            fromBig(big.NewInt(int64(pub.E))),
-	}
-
-	pk.setFingerPrintAndKeyId()
-	return pk
-}
-
-// NewDSAPublicKey returns a PublicKey that wraps the given dsa.PublicKey.
-func NewDSAPublicKey(creationTime time.Time, pub *dsa.PublicKey) *PublicKey {
-	pk := &PublicKey{
-		CreationTime: creationTime,
-		PubKeyAlgo:   PubKeyAlgoDSA,
-		PublicKey:    pub,
-		p:            fromBig(pub.P),
-		q:            fromBig(pub.Q),
-		g:            fromBig(pub.G),
-		y:            fromBig(pub.Y),
-	}
-
-	pk.setFingerPrintAndKeyId()
-	return pk
-}
-
-// NewElGamalPublicKey returns a PublicKey that wraps the given elgamal.PublicKey.
-func NewElGamalPublicKey(creationTime time.Time, pub *elgamal.PublicKey) *PublicKey {
-	pk := &PublicKey{
-		CreationTime: creationTime,
-		PubKeyAlgo:   PubKeyAlgoElGamal,
-		PublicKey:    pub,
-		p:            fromBig(pub.P),
-		g:            fromBig(pub.G),
-		y:            fromBig(pub.Y),
-	}
-
-	pk.setFingerPrintAndKeyId()
-	return pk
-}
-
-func NewECDSAPublicKey(creationTime time.Time, pub *ecdsa.PublicKey) *PublicKey {
-	pk := &PublicKey{
-		CreationTime: creationTime,
-		PubKeyAlgo:   PubKeyAlgoECDSA,
-		PublicKey:    pub,
-		ec:           new(ecdsaKey),
-	}
-
-	switch pub.Curve {
-	case elliptic.P256():
-		pk.ec.oid = oidCurveP256
-	case elliptic.P384():
-		pk.ec.oid = oidCurveP384
-	case elliptic.P521():
-		pk.ec.oid = oidCurveP521
-	default:
-		panic("unknown elliptic curve")
-	}
-
-	pk.ec.p.bytes = elliptic.Marshal(pub.Curve, pub.X, pub.Y)
-	pk.ec.p.bitLength = uint16(8 * len(pk.ec.p.bytes))
-
-	pk.setFingerPrintAndKeyId()
-	return pk
-}
-
-func (pk *PublicKey) parse(r io.Reader) (err error) {
-	// RFC 4880, section 5.5.2
-	var buf [6]byte
-	_, err = readFull(r, buf[:])
-	if err != nil {
-		return
-	}
-	if buf[0] != 4 {
-		return errors.UnsupportedError("public key version")
-	}
-	pk.CreationTime = time.Unix(int64(uint32(buf[1])<<24|uint32(buf[2])<<16|uint32(buf[3])<<8|uint32(buf[4])), 0)
-	pk.PubKeyAlgo = PublicKeyAlgorithm(buf[5])
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		err = pk.parseRSA(r)
-	case PubKeyAlgoDSA:
-		err = pk.parseDSA(r)
-	case PubKeyAlgoElGamal:
-		err = pk.parseElGamal(r)
-	case PubKeyAlgoECDSA:
-		pk.ec = new(ecdsaKey)
-		if err = pk.ec.parse(r); err != nil {
-			return err
-		}
-		pk.PublicKey, err = pk.ec.newECDSA()
-	case PubKeyAlgoECDH:
-		pk.ec = new(ecdsaKey)
-		if err = pk.ec.parse(r); err != nil {
-			return
-		}
-		pk.ecdh = new(ecdhKdf)
-		if err = pk.ecdh.parse(r); err != nil {
-			return
-		}
-		// The ECDH key is stored in an ecdsa.PublicKey for convenience.
-		pk.PublicKey, err = pk.ec.newECDSA()
-	default:
-		err = errors.UnsupportedError("public key type: " + strconv.Itoa(int(pk.PubKeyAlgo)))
-	}
-	if err != nil {
-		return
-	}
-
-	pk.setFingerPrintAndKeyId()
-	return
-}
-
-func (pk *PublicKey) setFingerPrintAndKeyId() {
-	// RFC 4880, section 12.2
-	fingerPrint := sha1.New()
-	pk.SerializeSignaturePrefix(fingerPrint)
-	pk.serializeWithoutHeaders(fingerPrint)
-	copy(pk.Fingerprint[:], fingerPrint.Sum(nil))
-	pk.KeyId = binary.BigEndian.Uint64(pk.Fingerprint[12:20])
-}
-
-// parseRSA parses RSA public key material from the given Reader. See RFC 4880,
-// section 5.5.2.
-func (pk *PublicKey) parseRSA(r io.Reader) (err error) {
-	pk.n.bytes, pk.n.bitLength, err = readMPI(r)
-	if err != nil {
-		return
-	}
-	pk.e.bytes, pk.e.bitLength, err = readMPI(r)
-	if err != nil {
-		return
-	}
-
-	if len(pk.e.bytes) > 3 {
-		err = errors.UnsupportedError("large public exponent")
-		return
-	}
-	rsa := &rsa.PublicKey{
-		N: new(big.Int).SetBytes(pk.n.bytes),
-		E: 0,
-	}
-	for i := 0; i < len(pk.e.bytes); i++ {
-		rsa.E <<= 8
-		rsa.E |= int(pk.e.bytes[i])
-	}
-	pk.PublicKey = rsa
-	return
-}
-
-// parseDSA parses DSA public key material from the given Reader. See RFC 4880,
-// section 5.5.2.
-func (pk *PublicKey) parseDSA(r io.Reader) (err error) {
-	pk.p.bytes, pk.p.bitLength, err = readMPI(r)
-	if err != nil {
-		return
-	}
-	pk.q.bytes, pk.q.bitLength, err = readMPI(r)
-	if err != nil {
-		return
-	}
-	pk.g.bytes, pk.g.bitLength, err = readMPI(r)
-	if err != nil {
-		return
-	}
-	pk.y.bytes, pk.y.bitLength, err = readMPI(r)
-	if err != nil {
-		return
-	}
-
-	dsa := new(dsa.PublicKey)
-	dsa.P = new(big.Int).SetBytes(pk.p.bytes)
-	dsa.Q = new(big.Int).SetBytes(pk.q.bytes)
-	dsa.G = new(big.Int).SetBytes(pk.g.bytes)
-	dsa.Y = new(big.Int).SetBytes(pk.y.bytes)
-	pk.PublicKey = dsa
-	return
-}
-
-// parseElGamal parses ElGamal public key material from the given Reader. See
-// RFC 4880, section 5.5.2.
-func (pk *PublicKey) parseElGamal(r io.Reader) (err error) {
-	pk.p.bytes, pk.p.bitLength, err = readMPI(r)
-	if err != nil {
-		return
-	}
-	pk.g.bytes, pk.g.bitLength, err = readMPI(r)
-	if err != nil {
-		return
-	}
-	pk.y.bytes, pk.y.bitLength, err = readMPI(r)
-	if err != nil {
-		return
-	}
-
-	elgamal := new(elgamal.PublicKey)
-	elgamal.P = new(big.Int).SetBytes(pk.p.bytes)
-	elgamal.G = new(big.Int).SetBytes(pk.g.bytes)
-	elgamal.Y = new(big.Int).SetBytes(pk.y.bytes)
-	pk.PublicKey = elgamal
-	return
-}
-
-// SerializeSignaturePrefix writes the prefix for this public key to the given Writer.
-// The prefix is used when calculating a signature over this public key. See
-// RFC 4880, section 5.2.4.
-func (pk *PublicKey) SerializeSignaturePrefix(h io.Writer) {
-	var pLength uint16
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		pLength += 2 + uint16(len(pk.n.bytes))
-		pLength += 2 + uint16(len(pk.e.bytes))
-	case PubKeyAlgoDSA:
-		pLength += 2 + uint16(len(pk.p.bytes))
-		pLength += 2 + uint16(len(pk.q.bytes))
-		pLength += 2 + uint16(len(pk.g.bytes))
-		pLength += 2 + uint16(len(pk.y.bytes))
-	case PubKeyAlgoElGamal:
-		pLength += 2 + uint16(len(pk.p.bytes))
-		pLength += 2 + uint16(len(pk.g.bytes))
-		pLength += 2 + uint16(len(pk.y.bytes))
-	case PubKeyAlgoECDSA:
-		pLength += uint16(pk.ec.byteLen())
-	case PubKeyAlgoECDH:
-		pLength += uint16(pk.ec.byteLen())
-		pLength += uint16(pk.ecdh.byteLen())
-	default:
-		panic("unknown public key algorithm")
-	}
-	pLength += 6
-	h.Write([]byte{0x99, byte(pLength >> 8), byte(pLength)})
-	return
-}
-
-func (pk *PublicKey) Serialize(w io.Writer) (err error) {
-	length := 6 // 6 byte header
-
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		length += 2 + len(pk.n.bytes)
-		length += 2 + len(pk.e.bytes)
-	case PubKeyAlgoDSA:
-		length += 2 + len(pk.p.bytes)
-		length += 2 + len(pk.q.bytes)
-		length += 2 + len(pk.g.bytes)
-		length += 2 + len(pk.y.bytes)
-	case PubKeyAlgoElGamal:
-		length += 2 + len(pk.p.bytes)
-		length += 2 + len(pk.g.bytes)
-		length += 2 + len(pk.y.bytes)
-	case PubKeyAlgoECDSA:
-		length += pk.ec.byteLen()
-	case PubKeyAlgoECDH:
-		length += pk.ec.byteLen()
-		length += pk.ecdh.byteLen()
-	default:
-		panic("unknown public key algorithm")
-	}
-
-	packetType := packetTypePublicKey
-	if pk.IsSubkey {
-		packetType = packetTypePublicSubkey
-	}
-	err = serializeHeader(w, packetType, length)
-	if err != nil {
-		return
-	}
-	return pk.serializeWithoutHeaders(w)
-}
-
-// serializeWithoutHeaders marshals the PublicKey to w in the form of an
-// OpenPGP public key packet, not including the packet header.
-func (pk *PublicKey) serializeWithoutHeaders(w io.Writer) (err error) {
-	var buf [6]byte
-	buf[0] = 4
-	t := uint32(pk.CreationTime.Unix())
-	buf[1] = byte(t >> 24)
-	buf[2] = byte(t >> 16)
-	buf[3] = byte(t >> 8)
-	buf[4] = byte(t)
-	buf[5] = byte(pk.PubKeyAlgo)
-
-	_, err = w.Write(buf[:])
-	if err != nil {
-		return
-	}
-
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		return writeMPIs(w, pk.n, pk.e)
-	case PubKeyAlgoDSA:
-		return writeMPIs(w, pk.p, pk.q, pk.g, pk.y)
-	case PubKeyAlgoElGamal:
-		return writeMPIs(w, pk.p, pk.g, pk.y)
-	case PubKeyAlgoECDSA:
-		return pk.ec.serialize(w)
-	case PubKeyAlgoECDH:
-		if err = pk.ec.serialize(w); err != nil {
-			return
-		}
-		return pk.ecdh.serialize(w)
-	}
-	return errors.InvalidArgumentError("bad public-key algorithm")
-}
-
-// CanSign returns true iff this public key can generate signatures
-func (pk *PublicKey) CanSign() bool {
-	return pk.PubKeyAlgo != PubKeyAlgoRSAEncryptOnly && pk.PubKeyAlgo != PubKeyAlgoElGamal
-}
-
-// VerifySignature returns nil iff sig is a valid signature, made by this
-// public key, of the data hashed into signed. signed is mutated by this call.
-func (pk *PublicKey) VerifySignature(signed hash.Hash, sig *Signature) (err error) {
-	if !pk.CanSign() {
-		return errors.InvalidArgumentError("public key cannot generate signatures")
-	}
-
-	signed.Write(sig.HashSuffix)
-	hashBytes := signed.Sum(nil)
-
-	if hashBytes[0] != sig.HashTag[0] || hashBytes[1] != sig.HashTag[1] {
-		return errors.SignatureError("hash tag doesn't match")
-	}
-
-	if pk.PubKeyAlgo != sig.PubKeyAlgo {
-		return errors.InvalidArgumentError("public key and signature use different algorithms")
-	}
-
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
-		rsaPublicKey, _ := pk.PublicKey.(*rsa.PublicKey)
-		err = rsa.VerifyPKCS1v15(rsaPublicKey, sig.Hash, hashBytes, sig.RSASignature.bytes)
-		if err != nil {
-			return errors.SignatureError("RSA verification failure")
-		}
-		return nil
-	case PubKeyAlgoDSA:
-		dsaPublicKey, _ := pk.PublicKey.(*dsa.PublicKey)
-		// Need to truncate hashBytes to match FIPS 186-3 section 4.6.
-		subgroupSize := (dsaPublicKey.Q.BitLen() + 7) / 8
-		if len(hashBytes) > subgroupSize {
-			hashBytes = hashBytes[:subgroupSize]
-		}
-		if !dsa.Verify(dsaPublicKey, hashBytes, new(big.Int).SetBytes(sig.DSASigR.bytes), new(big.Int).SetBytes(sig.DSASigS.bytes)) {
-			return errors.SignatureError("DSA verification failure")
-		}
-		return nil
-	case PubKeyAlgoECDSA:
-		ecdsaPublicKey := pk.PublicKey.(*ecdsa.PublicKey)
-		if !ecdsa.Verify(ecdsaPublicKey, hashBytes, new(big.Int).SetBytes(sig.ECDSASigR.bytes), new(big.Int).SetBytes(sig.ECDSASigS.bytes)) {
-			return errors.SignatureError("ECDSA verification failure")
-		}
-		return nil
-	default:
-		return errors.SignatureError("Unsupported public key algorithm used in signature")
-	}
-}
-
-// VerifySignatureV3 returns nil iff sig is a valid signature, made by this
-// public key, of the data hashed into signed. signed is mutated by this call.
-func (pk *PublicKey) VerifySignatureV3(signed hash.Hash, sig *SignatureV3) (err error) {
-	if !pk.CanSign() {
-		return errors.InvalidArgumentError("public key cannot generate signatures")
-	}
-
-	suffix := make([]byte, 5)
-	suffix[0] = byte(sig.SigType)
-	binary.BigEndian.PutUint32(suffix[1:], uint32(sig.CreationTime.Unix()))
-	signed.Write(suffix)
-	hashBytes := signed.Sum(nil)
-
-	if hashBytes[0] != sig.HashTag[0] || hashBytes[1] != sig.HashTag[1] {
-		return errors.SignatureError("hash tag doesn't match")
-	}
-
-	if pk.PubKeyAlgo != sig.PubKeyAlgo {
-		return errors.InvalidArgumentError("public key and signature use different algorithms")
-	}
-
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
-		rsaPublicKey := pk.PublicKey.(*rsa.PublicKey)
-		if err = rsa.VerifyPKCS1v15(rsaPublicKey, sig.Hash, hashBytes, sig.RSASignature.bytes); err != nil {
-			return errors.SignatureError("RSA verification failure")
-		}
-		return
-	case PubKeyAlgoDSA:
-		dsaPublicKey := pk.PublicKey.(*dsa.PublicKey)
-		// Need to truncate hashBytes to match FIPS 186-3 section 4.6.
-		subgroupSize := (dsaPublicKey.Q.BitLen() + 7) / 8
-		if len(hashBytes) > subgroupSize {
-			hashBytes = hashBytes[:subgroupSize]
-		}
-		if !dsa.Verify(dsaPublicKey, hashBytes, new(big.Int).SetBytes(sig.DSASigR.bytes), new(big.Int).SetBytes(sig.DSASigS.bytes)) {
-			return errors.SignatureError("DSA verification failure")
-		}
-		return nil
-	default:
-		panic("shouldn't happen")
-	}
-}
-
-// keySignatureHash returns a Hash of the message that needs to be signed for
-// pk to assert a subkey relationship to signed.
-func keySignatureHash(pk, signed signingKey, hashFunc crypto.Hash) (h hash.Hash, err error) {
-	if !hashFunc.Available() {
-		return nil, errors.UnsupportedError("hash function")
-	}
-	h = hashFunc.New()
-
-	// RFC 4880, section 5.2.4
-	pk.SerializeSignaturePrefix(h)
-	pk.serializeWithoutHeaders(h)
-	signed.SerializeSignaturePrefix(h)
-	signed.serializeWithoutHeaders(h)
-	return
-}
-
-// VerifyKeySignature returns nil iff sig is a valid signature, made by this
-// public key, of signed.
-func (pk *PublicKey) VerifyKeySignature(signed *PublicKey, sig *Signature) error {
-	h, err := keySignatureHash(pk, signed, sig.Hash)
-	if err != nil {
-		return err
-	}
-	if err = pk.VerifySignature(h, sig); err != nil {
-		return err
-	}
-
-	if sig.FlagSign {
-		// Signing subkeys must be cross-signed. See
-		// https://www.gnupg.org/faq/subkey-cross-certify.html.
-		if sig.EmbeddedSignature == nil {
-			return errors.StructuralError("signing subkey is missing cross-signature")
-		}
-		// Verify the cross-signature. This is calculated over the same
-		// data as the main signature, so we cannot just recursively
-		// call signed.VerifyKeySignature(...)
-		if h, err = keySignatureHash(pk, signed, sig.EmbeddedSignature.Hash); err != nil {
-			return errors.StructuralError("error while hashing for cross-signature: " + err.Error())
-		}
-		if err := signed.VerifySignature(h, sig.EmbeddedSignature); err != nil {
-			return errors.StructuralError("error while verifying cross-signature: " + err.Error())
-		}
-	}
-
-	return nil
-}
-
-func keyRevocationHash(pk signingKey, hashFunc crypto.Hash) (h hash.Hash, err error) {
-	if !hashFunc.Available() {
-		return nil, errors.UnsupportedError("hash function")
-	}
-	h = hashFunc.New()
-
-	// RFC 4880, section 5.2.4
-	pk.SerializeSignaturePrefix(h)
-	pk.serializeWithoutHeaders(h)
-
-	return
-}
-
-// VerifyRevocationSignature returns nil iff sig is a valid signature, made by this
-// public key.
-func (pk *PublicKey) VerifyRevocationSignature(sig *Signature) (err error) {
-	h, err := keyRevocationHash(pk, sig.Hash)
-	if err != nil {
-		return err
-	}
-	return pk.VerifySignature(h, sig)
-}
-
-// userIdSignatureHash returns a Hash of the message that needs to be signed
-// to assert that pk is a valid key for id.
-func userIdSignatureHash(id string, pk *PublicKey, hashFunc crypto.Hash) (h hash.Hash, err error) {
-	if !hashFunc.Available() {
-		return nil, errors.UnsupportedError("hash function")
-	}
-	h = hashFunc.New()
-
-	// RFC 4880, section 5.2.4
-	pk.SerializeSignaturePrefix(h)
-	pk.serializeWithoutHeaders(h)
-
-	var buf [5]byte
-	buf[0] = 0xb4
-	buf[1] = byte(len(id) >> 24)
-	buf[2] = byte(len(id) >> 16)
-	buf[3] = byte(len(id) >> 8)
-	buf[4] = byte(len(id))
-	h.Write(buf[:])
-	h.Write([]byte(id))
-
-	return
-}
-
-// VerifyUserIdSignature returns nil iff sig is a valid signature, made by this
-// public key, that id is the identity of pub.
-func (pk *PublicKey) VerifyUserIdSignature(id string, pub *PublicKey, sig *Signature) (err error) {
-	h, err := userIdSignatureHash(id, pub, sig.Hash)
-	if err != nil {
-		return err
-	}
-	return pk.VerifySignature(h, sig)
-}
-
-// VerifyUserIdSignatureV3 returns nil iff sig is a valid signature, made by this
-// public key, that id is the identity of pub.
-func (pk *PublicKey) VerifyUserIdSignatureV3(id string, pub *PublicKey, sig *SignatureV3) (err error) {
-	h, err := userIdSignatureV3Hash(id, pub, sig.Hash)
-	if err != nil {
-		return err
-	}
-	return pk.VerifySignatureV3(h, sig)
-}
-
-// KeyIdString returns the public key's fingerprint in capital hex
-// (e.g. "6C7EE1B8621CC013").
-func (pk *PublicKey) KeyIdString() string {
-	return fmt.Sprintf("%X", pk.Fingerprint[12:20])
-}
-
-// KeyIdShortString returns the short form of public key's fingerprint
-// in capital hex, as shown by gpg --list-keys (e.g. "621CC013").
-func (pk *PublicKey) KeyIdShortString() string {
-	return fmt.Sprintf("%X", pk.Fingerprint[16:20])
-}
-
-// A parsedMPI is used to store the contents of a big integer, along with the
-// bit length that was specified in the original input. This allows the MPI to
-// be reserialized exactly.
-type parsedMPI struct {
-	bytes     []byte
-	bitLength uint16
-}
-
-// writeMPIs is a utility function for serializing several big integers to the
-// given Writer.
-func writeMPIs(w io.Writer, mpis ...parsedMPI) (err error) {
-	for _, mpi := range mpis {
-		err = writeMPI(w, mpi.bitLength, mpi.bytes)
-		if err != nil {
-			return
-		}
-	}
-	return
-}
-
-// BitLength returns the bit length for the given public key.
-func (pk *PublicKey) BitLength() (bitLength uint16, err error) {
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		bitLength = pk.n.bitLength
-	case PubKeyAlgoDSA:
-		bitLength = pk.p.bitLength
-	case PubKeyAlgoElGamal:
-		bitLength = pk.p.bitLength
-	default:
-		err = errors.InvalidArgumentError("bad public-key algorithm")
-	}
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/public_key_v3.go b/vendor/golang.org/x/crypto/openpgp/packet/public_key_v3.go
deleted file mode 100644
index 5daf7b6c..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/public_key_v3.go
+++ /dev/null
@@ -1,279 +0,0 @@
-// Copyright 2013 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"crypto"
-	"crypto/md5"
-	"crypto/rsa"
-	"encoding/binary"
-	"fmt"
-	"hash"
-	"io"
-	"math/big"
-	"strconv"
-	"time"
-
-	"golang.org/x/crypto/openpgp/errors"
-)
-
-// PublicKeyV3 represents older, version 3 public keys. These keys are less secure and
-// should not be used for signing or encrypting. They are supported here only for
-// parsing version 3 key material and validating signatures.
-// See RFC 4880, section 5.5.2.
-type PublicKeyV3 struct {
-	CreationTime time.Time
-	DaysToExpire uint16
-	PubKeyAlgo   PublicKeyAlgorithm
-	PublicKey    *rsa.PublicKey
-	Fingerprint  [16]byte
-	KeyId        uint64
-	IsSubkey     bool
-
-	n, e parsedMPI
-}
-
-// newRSAPublicKeyV3 returns a PublicKey that wraps the given rsa.PublicKey.
-// Included here for testing purposes only. RFC 4880, section 5.5.2:
-// "an implementation MUST NOT generate a V3 key, but MAY accept it."
-func newRSAPublicKeyV3(creationTime time.Time, pub *rsa.PublicKey) *PublicKeyV3 {
-	pk := &PublicKeyV3{
-		CreationTime: creationTime,
-		PublicKey:    pub,
-		n:            fromBig(pub.N),
-		e:            fromBig(big.NewInt(int64(pub.E))),
-	}
-
-	pk.setFingerPrintAndKeyId()
-	return pk
-}
-
-func (pk *PublicKeyV3) parse(r io.Reader) (err error) {
-	// RFC 4880, section 5.5.2
-	var buf [8]byte
-	if _, err = readFull(r, buf[:]); err != nil {
-		return
-	}
-	if buf[0] < 2 || buf[0] > 3 {
-		return errors.UnsupportedError("public key version")
-	}
-	pk.CreationTime = time.Unix(int64(uint32(buf[1])<<24|uint32(buf[2])<<16|uint32(buf[3])<<8|uint32(buf[4])), 0)
-	pk.DaysToExpire = binary.BigEndian.Uint16(buf[5:7])
-	pk.PubKeyAlgo = PublicKeyAlgorithm(buf[7])
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		err = pk.parseRSA(r)
-	default:
-		err = errors.UnsupportedError("public key type: " + strconv.Itoa(int(pk.PubKeyAlgo)))
-	}
-	if err != nil {
-		return
-	}
-
-	pk.setFingerPrintAndKeyId()
-	return
-}
-
-func (pk *PublicKeyV3) setFingerPrintAndKeyId() {
-	// RFC 4880, section 12.2
-	fingerPrint := md5.New()
-	fingerPrint.Write(pk.n.bytes)
-	fingerPrint.Write(pk.e.bytes)
-	fingerPrint.Sum(pk.Fingerprint[:0])
-	pk.KeyId = binary.BigEndian.Uint64(pk.n.bytes[len(pk.n.bytes)-8:])
-}
-
-// parseRSA parses RSA public key material from the given Reader. See RFC 4880,
-// section 5.5.2.
-func (pk *PublicKeyV3) parseRSA(r io.Reader) (err error) {
-	if pk.n.bytes, pk.n.bitLength, err = readMPI(r); err != nil {
-		return
-	}
-	if pk.e.bytes, pk.e.bitLength, err = readMPI(r); err != nil {
-		return
-	}
-
-	// RFC 4880 Section 12.2 requires the low 8 bytes of the
-	// modulus to form the key id.
-	if len(pk.n.bytes) < 8 {
-		return errors.StructuralError("v3 public key modulus is too short")
-	}
-	if len(pk.e.bytes) > 3 {
-		err = errors.UnsupportedError("large public exponent")
-		return
-	}
-	rsa := &rsa.PublicKey{N: new(big.Int).SetBytes(pk.n.bytes)}
-	for i := 0; i < len(pk.e.bytes); i++ {
-		rsa.E <<= 8
-		rsa.E |= int(pk.e.bytes[i])
-	}
-	pk.PublicKey = rsa
-	return
-}
-
-// SerializeSignaturePrefix writes the prefix for this public key to the given Writer.
-// The prefix is used when calculating a signature over this public key. See
-// RFC 4880, section 5.2.4.
-func (pk *PublicKeyV3) SerializeSignaturePrefix(w io.Writer) {
-	var pLength uint16
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		pLength += 2 + uint16(len(pk.n.bytes))
-		pLength += 2 + uint16(len(pk.e.bytes))
-	default:
-		panic("unknown public key algorithm")
-	}
-	pLength += 6
-	w.Write([]byte{0x99, byte(pLength >> 8), byte(pLength)})
-	return
-}
-
-func (pk *PublicKeyV3) Serialize(w io.Writer) (err error) {
-	length := 8 // 8 byte header
-
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		length += 2 + len(pk.n.bytes)
-		length += 2 + len(pk.e.bytes)
-	default:
-		panic("unknown public key algorithm")
-	}
-
-	packetType := packetTypePublicKey
-	if pk.IsSubkey {
-		packetType = packetTypePublicSubkey
-	}
-	if err = serializeHeader(w, packetType, length); err != nil {
-		return
-	}
-	return pk.serializeWithoutHeaders(w)
-}
-
-// serializeWithoutHeaders marshals the PublicKey to w in the form of an
-// OpenPGP public key packet, not including the packet header.
-func (pk *PublicKeyV3) serializeWithoutHeaders(w io.Writer) (err error) {
-	var buf [8]byte
-	// Version 3
-	buf[0] = 3
-	// Creation time
-	t := uint32(pk.CreationTime.Unix())
-	buf[1] = byte(t >> 24)
-	buf[2] = byte(t >> 16)
-	buf[3] = byte(t >> 8)
-	buf[4] = byte(t)
-	// Days to expire
-	buf[5] = byte(pk.DaysToExpire >> 8)
-	buf[6] = byte(pk.DaysToExpire)
-	// Public key algorithm
-	buf[7] = byte(pk.PubKeyAlgo)
-
-	if _, err = w.Write(buf[:]); err != nil {
-		return
-	}
-
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		return writeMPIs(w, pk.n, pk.e)
-	}
-	return errors.InvalidArgumentError("bad public-key algorithm")
-}
-
-// CanSign returns true iff this public key can generate signatures
-func (pk *PublicKeyV3) CanSign() bool {
-	return pk.PubKeyAlgo != PubKeyAlgoRSAEncryptOnly
-}
-
-// VerifySignatureV3 returns nil iff sig is a valid signature, made by this
-// public key, of the data hashed into signed. signed is mutated by this call.
-func (pk *PublicKeyV3) VerifySignatureV3(signed hash.Hash, sig *SignatureV3) (err error) {
-	if !pk.CanSign() {
-		return errors.InvalidArgumentError("public key cannot generate signatures")
-	}
-
-	suffix := make([]byte, 5)
-	suffix[0] = byte(sig.SigType)
-	binary.BigEndian.PutUint32(suffix[1:], uint32(sig.CreationTime.Unix()))
-	signed.Write(suffix)
-	hashBytes := signed.Sum(nil)
-
-	if hashBytes[0] != sig.HashTag[0] || hashBytes[1] != sig.HashTag[1] {
-		return errors.SignatureError("hash tag doesn't match")
-	}
-
-	if pk.PubKeyAlgo != sig.PubKeyAlgo {
-		return errors.InvalidArgumentError("public key and signature use different algorithms")
-	}
-
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
-		if err = rsa.VerifyPKCS1v15(pk.PublicKey, sig.Hash, hashBytes, sig.RSASignature.bytes); err != nil {
-			return errors.SignatureError("RSA verification failure")
-		}
-		return
-	default:
-		// V3 public keys only support RSA.
-		panic("shouldn't happen")
-	}
-}
-
-// VerifyUserIdSignatureV3 returns nil iff sig is a valid signature, made by this
-// public key, that id is the identity of pub.
-func (pk *PublicKeyV3) VerifyUserIdSignatureV3(id string, pub *PublicKeyV3, sig *SignatureV3) (err error) {
-	h, err := userIdSignatureV3Hash(id, pk, sig.Hash)
-	if err != nil {
-		return err
-	}
-	return pk.VerifySignatureV3(h, sig)
-}
-
-// VerifyKeySignatureV3 returns nil iff sig is a valid signature, made by this
-// public key, of signed.
-func (pk *PublicKeyV3) VerifyKeySignatureV3(signed *PublicKeyV3, sig *SignatureV3) (err error) {
-	h, err := keySignatureHash(pk, signed, sig.Hash)
-	if err != nil {
-		return err
-	}
-	return pk.VerifySignatureV3(h, sig)
-}
-
-// userIdSignatureV3Hash returns a Hash of the message that needs to be signed
-// to assert that pk is a valid key for id.
-func userIdSignatureV3Hash(id string, pk signingKey, hfn crypto.Hash) (h hash.Hash, err error) {
-	if !hfn.Available() {
-		return nil, errors.UnsupportedError("hash function")
-	}
-	h = hfn.New()
-
-	// RFC 4880, section 5.2.4
-	pk.SerializeSignaturePrefix(h)
-	pk.serializeWithoutHeaders(h)
-
-	h.Write([]byte(id))
-
-	return
-}
-
-// KeyIdString returns the public key's fingerprint in capital hex
-// (e.g. "6C7EE1B8621CC013").
-func (pk *PublicKeyV3) KeyIdString() string {
-	return fmt.Sprintf("%X", pk.KeyId)
-}
-
-// KeyIdShortString returns the short form of public key's fingerprint
-// in capital hex, as shown by gpg --list-keys (e.g. "621CC013").
-func (pk *PublicKeyV3) KeyIdShortString() string {
-	return fmt.Sprintf("%X", pk.KeyId&0xFFFFFFFF)
-}
-
-// BitLength returns the bit length for the given public key.
-func (pk *PublicKeyV3) BitLength() (bitLength uint16, err error) {
-	switch pk.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
-		bitLength = pk.n.bitLength
-	default:
-		err = errors.InvalidArgumentError("bad public-key algorithm")
-	}
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/reader.go b/vendor/golang.org/x/crypto/openpgp/packet/reader.go
deleted file mode 100644
index 34bc7c61..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/reader.go
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"golang.org/x/crypto/openpgp/errors"
-	"io"
-)
-
-// Reader reads packets from an io.Reader and allows packets to be 'unread' so
-// that they result from the next call to Next.
-type Reader struct {
-	q       []Packet
-	readers []io.Reader
-}
-
-// New io.Readers are pushed when a compressed or encrypted packet is processed
-// and recursively treated as a new source of packets. However, a carefully
-// crafted packet can trigger an infinite recursive sequence of packets. See
-// http://mumble.net/~campbell/misc/pgp-quine
-// https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-4402
-// This constant limits the number of recursive packets that may be pushed.
-const maxReaders = 32
-
-// Next returns the most recently unread Packet, or reads another packet from
-// the top-most io.Reader. Unknown packet types are skipped.
-func (r *Reader) Next() (p Packet, err error) {
-	if len(r.q) > 0 {
-		p = r.q[len(r.q)-1]
-		r.q = r.q[:len(r.q)-1]
-		return
-	}
-
-	for len(r.readers) > 0 {
-		p, err = Read(r.readers[len(r.readers)-1])
-		if err == nil {
-			return
-		}
-		if err == io.EOF {
-			r.readers = r.readers[:len(r.readers)-1]
-			continue
-		}
-		if _, ok := err.(errors.UnknownPacketTypeError); !ok {
-			return nil, err
-		}
-	}
-
-	return nil, io.EOF
-}
-
-// Push causes the Reader to start reading from a new io.Reader. When an EOF
-// error is seen from the new io.Reader, it is popped and the Reader continues
-// to read from the next most recent io.Reader. Push returns a StructuralError
-// if pushing the reader would exceed the maximum recursion level, otherwise it
-// returns nil.
-func (r *Reader) Push(reader io.Reader) (err error) {
-	if len(r.readers) >= maxReaders {
-		return errors.StructuralError("too many layers of packets")
-	}
-	r.readers = append(r.readers, reader)
-	return nil
-}
-
-// Unread causes the given Packet to be returned from the next call to Next.
-func (r *Reader) Unread(p Packet) {
-	r.q = append(r.q, p)
-}
-
-func NewReader(r io.Reader) *Reader {
-	return &Reader{
-		q:       nil,
-		readers: []io.Reader{r},
-	}
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/signature.go b/vendor/golang.org/x/crypto/openpgp/packet/signature.go
deleted file mode 100644
index 6ce0cbed..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/signature.go
+++ /dev/null
@@ -1,731 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"bytes"
-	"crypto"
-	"crypto/dsa"
-	"crypto/ecdsa"
-	"encoding/asn1"
-	"encoding/binary"
-	"hash"
-	"io"
-	"math/big"
-	"strconv"
-	"time"
-
-	"golang.org/x/crypto/openpgp/errors"
-	"golang.org/x/crypto/openpgp/s2k"
-)
-
-const (
-	// See RFC 4880, section 5.2.3.21 for details.
-	KeyFlagCertify = 1 << iota
-	KeyFlagSign
-	KeyFlagEncryptCommunications
-	KeyFlagEncryptStorage
-)
-
-// Signature represents a signature. See RFC 4880, section 5.2.
-type Signature struct {
-	SigType    SignatureType
-	PubKeyAlgo PublicKeyAlgorithm
-	Hash       crypto.Hash
-
-	// HashSuffix is extra data that is hashed in after the signed data.
-	HashSuffix []byte
-	// HashTag contains the first two bytes of the hash for fast rejection
-	// of bad signed data.
-	HashTag      [2]byte
-	CreationTime time.Time
-
-	RSASignature         parsedMPI
-	DSASigR, DSASigS     parsedMPI
-	ECDSASigR, ECDSASigS parsedMPI
-
-	// rawSubpackets contains the unparsed subpackets, in order.
-	rawSubpackets []outputSubpacket
-
-	// The following are optional so are nil when not included in the
-	// signature.
-
-	SigLifetimeSecs, KeyLifetimeSecs                        *uint32
-	PreferredSymmetric, PreferredHash, PreferredCompression []uint8
-	IssuerKeyId                                             *uint64
-	IsPrimaryId                                             *bool
-
-	// FlagsValid is set if any flags were given. See RFC 4880, section
-	// 5.2.3.21 for details.
-	FlagsValid                                                           bool
-	FlagCertify, FlagSign, FlagEncryptCommunications, FlagEncryptStorage bool
-
-	// RevocationReason is set if this signature has been revoked.
-	// See RFC 4880, section 5.2.3.23 for details.
-	RevocationReason     *uint8
-	RevocationReasonText string
-
-	// MDC is set if this signature has a feature packet that indicates
-	// support for MDC subpackets.
-	MDC bool
-
-	// EmbeddedSignature, if non-nil, is a signature of the parent key, by
-	// this key. This prevents an attacker from claiming another's signing
-	// subkey as their own.
-	EmbeddedSignature *Signature
-
-	outSubpackets []outputSubpacket
-}
-
-func (sig *Signature) parse(r io.Reader) (err error) {
-	// RFC 4880, section 5.2.3
-	var buf [5]byte
-	_, err = readFull(r, buf[:1])
-	if err != nil {
-		return
-	}
-	if buf[0] != 4 {
-		err = errors.UnsupportedError("signature packet version " + strconv.Itoa(int(buf[0])))
-		return
-	}
-
-	_, err = readFull(r, buf[:5])
-	if err != nil {
-		return
-	}
-	sig.SigType = SignatureType(buf[0])
-	sig.PubKeyAlgo = PublicKeyAlgorithm(buf[1])
-	switch sig.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA, PubKeyAlgoECDSA:
-	default:
-		err = errors.UnsupportedError("public key algorithm " + strconv.Itoa(int(sig.PubKeyAlgo)))
-		return
-	}
-
-	var ok bool
-	sig.Hash, ok = s2k.HashIdToHash(buf[2])
-	if !ok {
-		return errors.UnsupportedError("hash function " + strconv.Itoa(int(buf[2])))
-	}
-
-	hashedSubpacketsLength := int(buf[3])<<8 | int(buf[4])
-	l := 6 + hashedSubpacketsLength
-	sig.HashSuffix = make([]byte, l+6)
-	sig.HashSuffix[0] = 4
-	copy(sig.HashSuffix[1:], buf[:5])
-	hashedSubpackets := sig.HashSuffix[6:l]
-	_, err = readFull(r, hashedSubpackets)
-	if err != nil {
-		return
-	}
-	// See RFC 4880, section 5.2.4
-	trailer := sig.HashSuffix[l:]
-	trailer[0] = 4
-	trailer[1] = 0xff
-	trailer[2] = uint8(l >> 24)
-	trailer[3] = uint8(l >> 16)
-	trailer[4] = uint8(l >> 8)
-	trailer[5] = uint8(l)
-
-	err = parseSignatureSubpackets(sig, hashedSubpackets, true)
-	if err != nil {
-		return
-	}
-
-	_, err = readFull(r, buf[:2])
-	if err != nil {
-		return
-	}
-	unhashedSubpacketsLength := int(buf[0])<<8 | int(buf[1])
-	unhashedSubpackets := make([]byte, unhashedSubpacketsLength)
-	_, err = readFull(r, unhashedSubpackets)
-	if err != nil {
-		return
-	}
-	err = parseSignatureSubpackets(sig, unhashedSubpackets, false)
-	if err != nil {
-		return
-	}
-
-	_, err = readFull(r, sig.HashTag[:2])
-	if err != nil {
-		return
-	}
-
-	switch sig.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
-		sig.RSASignature.bytes, sig.RSASignature.bitLength, err = readMPI(r)
-	case PubKeyAlgoDSA:
-		sig.DSASigR.bytes, sig.DSASigR.bitLength, err = readMPI(r)
-		if err == nil {
-			sig.DSASigS.bytes, sig.DSASigS.bitLength, err = readMPI(r)
-		}
-	case PubKeyAlgoECDSA:
-		sig.ECDSASigR.bytes, sig.ECDSASigR.bitLength, err = readMPI(r)
-		if err == nil {
-			sig.ECDSASigS.bytes, sig.ECDSASigS.bitLength, err = readMPI(r)
-		}
-	default:
-		panic("unreachable")
-	}
-	return
-}
-
-// parseSignatureSubpackets parses subpackets of the main signature packet. See
-// RFC 4880, section 5.2.3.1.
-func parseSignatureSubpackets(sig *Signature, subpackets []byte, isHashed bool) (err error) {
-	for len(subpackets) > 0 {
-		subpackets, err = parseSignatureSubpacket(sig, subpackets, isHashed)
-		if err != nil {
-			return
-		}
-	}
-
-	if sig.CreationTime.IsZero() {
-		err = errors.StructuralError("no creation time in signature")
-	}
-
-	return
-}
-
-type signatureSubpacketType uint8
-
-const (
-	creationTimeSubpacket        signatureSubpacketType = 2
-	signatureExpirationSubpacket signatureSubpacketType = 3
-	keyExpirationSubpacket       signatureSubpacketType = 9
-	prefSymmetricAlgosSubpacket  signatureSubpacketType = 11
-	issuerSubpacket              signatureSubpacketType = 16
-	prefHashAlgosSubpacket       signatureSubpacketType = 21
-	prefCompressionSubpacket     signatureSubpacketType = 22
-	primaryUserIdSubpacket       signatureSubpacketType = 25
-	keyFlagsSubpacket            signatureSubpacketType = 27
-	reasonForRevocationSubpacket signatureSubpacketType = 29
-	featuresSubpacket            signatureSubpacketType = 30
-	embeddedSignatureSubpacket   signatureSubpacketType = 32
-)
-
-// parseSignatureSubpacket parses a single subpacket. len(subpacket) is >= 1.
-func parseSignatureSubpacket(sig *Signature, subpacket []byte, isHashed bool) (rest []byte, err error) {
-	// RFC 4880, section 5.2.3.1
-	var (
-		length     uint32
-		packetType signatureSubpacketType
-		isCritical bool
-	)
-	switch {
-	case subpacket[0] < 192:
-		length = uint32(subpacket[0])
-		subpacket = subpacket[1:]
-	case subpacket[0] < 255:
-		if len(subpacket) < 2 {
-			goto Truncated
-		}
-		length = uint32(subpacket[0]-192)<<8 + uint32(subpacket[1]) + 192
-		subpacket = subpacket[2:]
-	default:
-		if len(subpacket) < 5 {
-			goto Truncated
-		}
-		length = uint32(subpacket[1])<<24 |
-			uint32(subpacket[2])<<16 |
-			uint32(subpacket[3])<<8 |
-			uint32(subpacket[4])
-		subpacket = subpacket[5:]
-	}
-	if length > uint32(len(subpacket)) {
-		goto Truncated
-	}
-	rest = subpacket[length:]
-	subpacket = subpacket[:length]
-	if len(subpacket) == 0 {
-		err = errors.StructuralError("zero length signature subpacket")
-		return
-	}
-	packetType = signatureSubpacketType(subpacket[0] & 0x7f)
-	isCritical = subpacket[0]&0x80 == 0x80
-	subpacket = subpacket[1:]
-	sig.rawSubpackets = append(sig.rawSubpackets, outputSubpacket{isHashed, packetType, isCritical, subpacket})
-	switch packetType {
-	case creationTimeSubpacket:
-		if !isHashed {
-			err = errors.StructuralError("signature creation time in non-hashed area")
-			return
-		}
-		if len(subpacket) != 4 {
-			err = errors.StructuralError("signature creation time not four bytes")
-			return
-		}
-		t := binary.BigEndian.Uint32(subpacket)
-		sig.CreationTime = time.Unix(int64(t), 0)
-	case signatureExpirationSubpacket:
-		// Signature expiration time, section 5.2.3.10
-		if !isHashed {
-			return
-		}
-		if len(subpacket) != 4 {
-			err = errors.StructuralError("expiration subpacket with bad length")
-			return
-		}
-		sig.SigLifetimeSecs = new(uint32)
-		*sig.SigLifetimeSecs = binary.BigEndian.Uint32(subpacket)
-	case keyExpirationSubpacket:
-		// Key expiration time, section 5.2.3.6
-		if !isHashed {
-			return
-		}
-		if len(subpacket) != 4 {
-			err = errors.StructuralError("key expiration subpacket with bad length")
-			return
-		}
-		sig.KeyLifetimeSecs = new(uint32)
-		*sig.KeyLifetimeSecs = binary.BigEndian.Uint32(subpacket)
-	case prefSymmetricAlgosSubpacket:
-		// Preferred symmetric algorithms, section 5.2.3.7
-		if !isHashed {
-			return
-		}
-		sig.PreferredSymmetric = make([]byte, len(subpacket))
-		copy(sig.PreferredSymmetric, subpacket)
-	case issuerSubpacket:
-		// Issuer, section 5.2.3.5
-		if len(subpacket) != 8 {
-			err = errors.StructuralError("issuer subpacket with bad length")
-			return
-		}
-		sig.IssuerKeyId = new(uint64)
-		*sig.IssuerKeyId = binary.BigEndian.Uint64(subpacket)
-	case prefHashAlgosSubpacket:
-		// Preferred hash algorithms, section 5.2.3.8
-		if !isHashed {
-			return
-		}
-		sig.PreferredHash = make([]byte, len(subpacket))
-		copy(sig.PreferredHash, subpacket)
-	case prefCompressionSubpacket:
-		// Preferred compression algorithms, section 5.2.3.9
-		if !isHashed {
-			return
-		}
-		sig.PreferredCompression = make([]byte, len(subpacket))
-		copy(sig.PreferredCompression, subpacket)
-	case primaryUserIdSubpacket:
-		// Primary User ID, section 5.2.3.19
-		if !isHashed {
-			return
-		}
-		if len(subpacket) != 1 {
-			err = errors.StructuralError("primary user id subpacket with bad length")
-			return
-		}
-		sig.IsPrimaryId = new(bool)
-		if subpacket[0] > 0 {
-			*sig.IsPrimaryId = true
-		}
-	case keyFlagsSubpacket:
-		// Key flags, section 5.2.3.21
-		if !isHashed {
-			return
-		}
-		if len(subpacket) == 0 {
-			err = errors.StructuralError("empty key flags subpacket")
-			return
-		}
-		sig.FlagsValid = true
-		if subpacket[0]&KeyFlagCertify != 0 {
-			sig.FlagCertify = true
-		}
-		if subpacket[0]&KeyFlagSign != 0 {
-			sig.FlagSign = true
-		}
-		if subpacket[0]&KeyFlagEncryptCommunications != 0 {
-			sig.FlagEncryptCommunications = true
-		}
-		if subpacket[0]&KeyFlagEncryptStorage != 0 {
-			sig.FlagEncryptStorage = true
-		}
-	case reasonForRevocationSubpacket:
-		// Reason For Revocation, section 5.2.3.23
-		if !isHashed {
-			return
-		}
-		if len(subpacket) == 0 {
-			err = errors.StructuralError("empty revocation reason subpacket")
-			return
-		}
-		sig.RevocationReason = new(uint8)
-		*sig.RevocationReason = subpacket[0]
-		sig.RevocationReasonText = string(subpacket[1:])
-	case featuresSubpacket:
-		// Features subpacket, section 5.2.3.24 specifies a very general
-		// mechanism for OpenPGP implementations to signal support for new
-		// features. In practice, the subpacket is used exclusively to
-		// indicate support for MDC-protected encryption.
-		sig.MDC = len(subpacket) >= 1 && subpacket[0]&1 == 1
-	case embeddedSignatureSubpacket:
-		// Only usage is in signatures that cross-certify
-		// signing subkeys. section 5.2.3.26 describes the
-		// format, with its usage described in section 11.1
-		if sig.EmbeddedSignature != nil {
-			err = errors.StructuralError("Cannot have multiple embedded signatures")
-			return
-		}
-		sig.EmbeddedSignature = new(Signature)
-		// Embedded signatures are required to be v4 signatures see
-		// section 12.1. However, we only parse v4 signatures in this
-		// file anyway.
-		if err := sig.EmbeddedSignature.parse(bytes.NewBuffer(subpacket)); err != nil {
-			return nil, err
-		}
-		if sigType := sig.EmbeddedSignature.SigType; sigType != SigTypePrimaryKeyBinding {
-			return nil, errors.StructuralError("cross-signature has unexpected type " + strconv.Itoa(int(sigType)))
-		}
-	default:
-		if isCritical {
-			err = errors.UnsupportedError("unknown critical signature subpacket type " + strconv.Itoa(int(packetType)))
-			return
-		}
-	}
-	return
-
-Truncated:
-	err = errors.StructuralError("signature subpacket truncated")
-	return
-}
-
-// subpacketLengthLength returns the length, in bytes, of an encoded length value.
-func subpacketLengthLength(length int) int {
-	if length < 192 {
-		return 1
-	}
-	if length < 16320 {
-		return 2
-	}
-	return 5
-}
-
-// serializeSubpacketLength marshals the given length into to.
-func serializeSubpacketLength(to []byte, length int) int {
-	// RFC 4880, Section 4.2.2.
-	if length < 192 {
-		to[0] = byte(length)
-		return 1
-	}
-	if length < 16320 {
-		length -= 192
-		to[0] = byte((length >> 8) + 192)
-		to[1] = byte(length)
-		return 2
-	}
-	to[0] = 255
-	to[1] = byte(length >> 24)
-	to[2] = byte(length >> 16)
-	to[3] = byte(length >> 8)
-	to[4] = byte(length)
-	return 5
-}
-
-// subpacketsLength returns the serialized length, in bytes, of the given
-// subpackets.
-func subpacketsLength(subpackets []outputSubpacket, hashed bool) (length int) {
-	for _, subpacket := range subpackets {
-		if subpacket.hashed == hashed {
-			length += subpacketLengthLength(len(subpacket.contents) + 1)
-			length += 1 // type byte
-			length += len(subpacket.contents)
-		}
-	}
-	return
-}
-
-// serializeSubpackets marshals the given subpackets into to.
-func serializeSubpackets(to []byte, subpackets []outputSubpacket, hashed bool) {
-	for _, subpacket := range subpackets {
-		if subpacket.hashed == hashed {
-			n := serializeSubpacketLength(to, len(subpacket.contents)+1)
-			to[n] = byte(subpacket.subpacketType)
-			to = to[1+n:]
-			n = copy(to, subpacket.contents)
-			to = to[n:]
-		}
-	}
-	return
-}
-
-// KeyExpired returns whether sig is a self-signature of a key that has
-// expired.
-func (sig *Signature) KeyExpired(currentTime time.Time) bool {
-	if sig.KeyLifetimeSecs == nil {
-		return false
-	}
-	expiry := sig.CreationTime.Add(time.Duration(*sig.KeyLifetimeSecs) * time.Second)
-	return currentTime.After(expiry)
-}
-
-// buildHashSuffix constructs the HashSuffix member of sig in preparation for signing.
-func (sig *Signature) buildHashSuffix() (err error) {
-	hashedSubpacketsLen := subpacketsLength(sig.outSubpackets, true)
-
-	var ok bool
-	l := 6 + hashedSubpacketsLen
-	sig.HashSuffix = make([]byte, l+6)
-	sig.HashSuffix[0] = 4
-	sig.HashSuffix[1] = uint8(sig.SigType)
-	sig.HashSuffix[2] = uint8(sig.PubKeyAlgo)
-	sig.HashSuffix[3], ok = s2k.HashToHashId(sig.Hash)
-	if !ok {
-		sig.HashSuffix = nil
-		return errors.InvalidArgumentError("hash cannot be represented in OpenPGP: " + strconv.Itoa(int(sig.Hash)))
-	}
-	sig.HashSuffix[4] = byte(hashedSubpacketsLen >> 8)
-	sig.HashSuffix[5] = byte(hashedSubpacketsLen)
-	serializeSubpackets(sig.HashSuffix[6:l], sig.outSubpackets, true)
-	trailer := sig.HashSuffix[l:]
-	trailer[0] = 4
-	trailer[1] = 0xff
-	trailer[2] = byte(l >> 24)
-	trailer[3] = byte(l >> 16)
-	trailer[4] = byte(l >> 8)
-	trailer[5] = byte(l)
-	return
-}
-
-func (sig *Signature) signPrepareHash(h hash.Hash) (digest []byte, err error) {
-	err = sig.buildHashSuffix()
-	if err != nil {
-		return
-	}
-
-	h.Write(sig.HashSuffix)
-	digest = h.Sum(nil)
-	copy(sig.HashTag[:], digest)
-	return
-}
-
-// Sign signs a message with a private key. The hash, h, must contain
-// the hash of the message to be signed and will be mutated by this function.
-// On success, the signature is stored in sig. Call Serialize to write it out.
-// If config is nil, sensible defaults will be used.
-func (sig *Signature) Sign(h hash.Hash, priv *PrivateKey, config *Config) (err error) {
-	sig.outSubpackets = sig.buildSubpackets()
-	digest, err := sig.signPrepareHash(h)
-	if err != nil {
-		return
-	}
-
-	switch priv.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
-		// supports both *rsa.PrivateKey and crypto.Signer
-		sig.RSASignature.bytes, err = priv.PrivateKey.(crypto.Signer).Sign(config.Random(), digest, sig.Hash)
-		sig.RSASignature.bitLength = uint16(8 * len(sig.RSASignature.bytes))
-	case PubKeyAlgoDSA:
-		dsaPriv := priv.PrivateKey.(*dsa.PrivateKey)
-
-		// Need to truncate hashBytes to match FIPS 186-3 section 4.6.
-		subgroupSize := (dsaPriv.Q.BitLen() + 7) / 8
-		if len(digest) > subgroupSize {
-			digest = digest[:subgroupSize]
-		}
-		r, s, err := dsa.Sign(config.Random(), dsaPriv, digest)
-		if err == nil {
-			sig.DSASigR.bytes = r.Bytes()
-			sig.DSASigR.bitLength = uint16(8 * len(sig.DSASigR.bytes))
-			sig.DSASigS.bytes = s.Bytes()
-			sig.DSASigS.bitLength = uint16(8 * len(sig.DSASigS.bytes))
-		}
-	case PubKeyAlgoECDSA:
-		var r, s *big.Int
-		if pk, ok := priv.PrivateKey.(*ecdsa.PrivateKey); ok {
-			// direct support, avoid asn1 wrapping/unwrapping
-			r, s, err = ecdsa.Sign(config.Random(), pk, digest)
-		} else {
-			var b []byte
-			b, err = priv.PrivateKey.(crypto.Signer).Sign(config.Random(), digest, nil)
-			if err == nil {
-				r, s, err = unwrapECDSASig(b)
-			}
-		}
-		if err == nil {
-			sig.ECDSASigR = fromBig(r)
-			sig.ECDSASigS = fromBig(s)
-		}
-	default:
-		err = errors.UnsupportedError("public key algorithm: " + strconv.Itoa(int(sig.PubKeyAlgo)))
-	}
-
-	return
-}
-
-// unwrapECDSASig parses the two integer components of an ASN.1-encoded ECDSA
-// signature.
-func unwrapECDSASig(b []byte) (r, s *big.Int, err error) {
-	var ecsdaSig struct {
-		R, S *big.Int
-	}
-	_, err = asn1.Unmarshal(b, &ecsdaSig)
-	if err != nil {
-		return
-	}
-	return ecsdaSig.R, ecsdaSig.S, nil
-}
-
-// SignUserId computes a signature from priv, asserting that pub is a valid
-// key for the identity id.  On success, the signature is stored in sig. Call
-// Serialize to write it out.
-// If config is nil, sensible defaults will be used.
-func (sig *Signature) SignUserId(id string, pub *PublicKey, priv *PrivateKey, config *Config) error {
-	h, err := userIdSignatureHash(id, pub, sig.Hash)
-	if err != nil {
-		return err
-	}
-	return sig.Sign(h, priv, config)
-}
-
-// SignKey computes a signature from priv, asserting that pub is a subkey. On
-// success, the signature is stored in sig. Call Serialize to write it out.
-// If config is nil, sensible defaults will be used.
-func (sig *Signature) SignKey(pub *PublicKey, priv *PrivateKey, config *Config) error {
-	h, err := keySignatureHash(&priv.PublicKey, pub, sig.Hash)
-	if err != nil {
-		return err
-	}
-	return sig.Sign(h, priv, config)
-}
-
-// Serialize marshals sig to w. Sign, SignUserId or SignKey must have been
-// called first.
-func (sig *Signature) Serialize(w io.Writer) (err error) {
-	if len(sig.outSubpackets) == 0 {
-		sig.outSubpackets = sig.rawSubpackets
-	}
-	if sig.RSASignature.bytes == nil && sig.DSASigR.bytes == nil && sig.ECDSASigR.bytes == nil {
-		return errors.InvalidArgumentError("Signature: need to call Sign, SignUserId or SignKey before Serialize")
-	}
-
-	sigLength := 0
-	switch sig.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
-		sigLength = 2 + len(sig.RSASignature.bytes)
-	case PubKeyAlgoDSA:
-		sigLength = 2 + len(sig.DSASigR.bytes)
-		sigLength += 2 + len(sig.DSASigS.bytes)
-	case PubKeyAlgoECDSA:
-		sigLength = 2 + len(sig.ECDSASigR.bytes)
-		sigLength += 2 + len(sig.ECDSASigS.bytes)
-	default:
-		panic("impossible")
-	}
-
-	unhashedSubpacketsLen := subpacketsLength(sig.outSubpackets, false)
-	length := len(sig.HashSuffix) - 6 /* trailer not included */ +
-		2 /* length of unhashed subpackets */ + unhashedSubpacketsLen +
-		2 /* hash tag */ + sigLength
-	err = serializeHeader(w, packetTypeSignature, length)
-	if err != nil {
-		return
-	}
-
-	_, err = w.Write(sig.HashSuffix[:len(sig.HashSuffix)-6])
-	if err != nil {
-		return
-	}
-
-	unhashedSubpackets := make([]byte, 2+unhashedSubpacketsLen)
-	unhashedSubpackets[0] = byte(unhashedSubpacketsLen >> 8)
-	unhashedSubpackets[1] = byte(unhashedSubpacketsLen)
-	serializeSubpackets(unhashedSubpackets[2:], sig.outSubpackets, false)
-
-	_, err = w.Write(unhashedSubpackets)
-	if err != nil {
-		return
-	}
-	_, err = w.Write(sig.HashTag[:])
-	if err != nil {
-		return
-	}
-
-	switch sig.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
-		err = writeMPIs(w, sig.RSASignature)
-	case PubKeyAlgoDSA:
-		err = writeMPIs(w, sig.DSASigR, sig.DSASigS)
-	case PubKeyAlgoECDSA:
-		err = writeMPIs(w, sig.ECDSASigR, sig.ECDSASigS)
-	default:
-		panic("impossible")
-	}
-	return
-}
-
-// outputSubpacket represents a subpacket to be marshaled.
-type outputSubpacket struct {
-	hashed        bool // true if this subpacket is in the hashed area.
-	subpacketType signatureSubpacketType
-	isCritical    bool
-	contents      []byte
-}
-
-func (sig *Signature) buildSubpackets() (subpackets []outputSubpacket) {
-	creationTime := make([]byte, 4)
-	binary.BigEndian.PutUint32(creationTime, uint32(sig.CreationTime.Unix()))
-	subpackets = append(subpackets, outputSubpacket{true, creationTimeSubpacket, false, creationTime})
-
-	if sig.IssuerKeyId != nil {
-		keyId := make([]byte, 8)
-		binary.BigEndian.PutUint64(keyId, *sig.IssuerKeyId)
-		subpackets = append(subpackets, outputSubpacket{true, issuerSubpacket, false, keyId})
-	}
-
-	if sig.SigLifetimeSecs != nil && *sig.SigLifetimeSecs != 0 {
-		sigLifetime := make([]byte, 4)
-		binary.BigEndian.PutUint32(sigLifetime, *sig.SigLifetimeSecs)
-		subpackets = append(subpackets, outputSubpacket{true, signatureExpirationSubpacket, true, sigLifetime})
-	}
-
-	// Key flags may only appear in self-signatures or certification signatures.
-
-	if sig.FlagsValid {
-		var flags byte
-		if sig.FlagCertify {
-			flags |= KeyFlagCertify
-		}
-		if sig.FlagSign {
-			flags |= KeyFlagSign
-		}
-		if sig.FlagEncryptCommunications {
-			flags |= KeyFlagEncryptCommunications
-		}
-		if sig.FlagEncryptStorage {
-			flags |= KeyFlagEncryptStorage
-		}
-		subpackets = append(subpackets, outputSubpacket{true, keyFlagsSubpacket, false, []byte{flags}})
-	}
-
-	// The following subpackets may only appear in self-signatures
-
-	if sig.KeyLifetimeSecs != nil && *sig.KeyLifetimeSecs != 0 {
-		keyLifetime := make([]byte, 4)
-		binary.BigEndian.PutUint32(keyLifetime, *sig.KeyLifetimeSecs)
-		subpackets = append(subpackets, outputSubpacket{true, keyExpirationSubpacket, true, keyLifetime})
-	}
-
-	if sig.IsPrimaryId != nil && *sig.IsPrimaryId {
-		subpackets = append(subpackets, outputSubpacket{true, primaryUserIdSubpacket, false, []byte{1}})
-	}
-
-	if len(sig.PreferredSymmetric) > 0 {
-		subpackets = append(subpackets, outputSubpacket{true, prefSymmetricAlgosSubpacket, false, sig.PreferredSymmetric})
-	}
-
-	if len(sig.PreferredHash) > 0 {
-		subpackets = append(subpackets, outputSubpacket{true, prefHashAlgosSubpacket, false, sig.PreferredHash})
-	}
-
-	if len(sig.PreferredCompression) > 0 {
-		subpackets = append(subpackets, outputSubpacket{true, prefCompressionSubpacket, false, sig.PreferredCompression})
-	}
-
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/signature_v3.go b/vendor/golang.org/x/crypto/openpgp/packet/signature_v3.go
deleted file mode 100644
index 6edff889..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/signature_v3.go
+++ /dev/null
@@ -1,146 +0,0 @@
-// Copyright 2013 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"crypto"
-	"encoding/binary"
-	"fmt"
-	"io"
-	"strconv"
-	"time"
-
-	"golang.org/x/crypto/openpgp/errors"
-	"golang.org/x/crypto/openpgp/s2k"
-)
-
-// SignatureV3 represents older version 3 signatures. These signatures are less secure
-// than version 4 and should not be used to create new signatures. They are included
-// here for backwards compatibility to read and validate with older key material.
-// See RFC 4880, section 5.2.2.
-type SignatureV3 struct {
-	SigType      SignatureType
-	CreationTime time.Time
-	IssuerKeyId  uint64
-	PubKeyAlgo   PublicKeyAlgorithm
-	Hash         crypto.Hash
-	HashTag      [2]byte
-
-	RSASignature     parsedMPI
-	DSASigR, DSASigS parsedMPI
-}
-
-func (sig *SignatureV3) parse(r io.Reader) (err error) {
-	// RFC 4880, section 5.2.2
-	var buf [8]byte
-	if _, err = readFull(r, buf[:1]); err != nil {
-		return
-	}
-	if buf[0] < 2 || buf[0] > 3 {
-		err = errors.UnsupportedError("signature packet version " + strconv.Itoa(int(buf[0])))
-		return
-	}
-	if _, err = readFull(r, buf[:1]); err != nil {
-		return
-	}
-	if buf[0] != 5 {
-		err = errors.UnsupportedError(
-			"invalid hashed material length " + strconv.Itoa(int(buf[0])))
-		return
-	}
-
-	// Read hashed material: signature type + creation time
-	if _, err = readFull(r, buf[:5]); err != nil {
-		return
-	}
-	sig.SigType = SignatureType(buf[0])
-	t := binary.BigEndian.Uint32(buf[1:5])
-	sig.CreationTime = time.Unix(int64(t), 0)
-
-	// Eight-octet Key ID of signer.
-	if _, err = readFull(r, buf[:8]); err != nil {
-		return
-	}
-	sig.IssuerKeyId = binary.BigEndian.Uint64(buf[:])
-
-	// Public-key and hash algorithm
-	if _, err = readFull(r, buf[:2]); err != nil {
-		return
-	}
-	sig.PubKeyAlgo = PublicKeyAlgorithm(buf[0])
-	switch sig.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA:
-	default:
-		err = errors.UnsupportedError("public key algorithm " + strconv.Itoa(int(sig.PubKeyAlgo)))
-		return
-	}
-	var ok bool
-	if sig.Hash, ok = s2k.HashIdToHash(buf[1]); !ok {
-		return errors.UnsupportedError("hash function " + strconv.Itoa(int(buf[2])))
-	}
-
-	// Two-octet field holding left 16 bits of signed hash value.
-	if _, err = readFull(r, sig.HashTag[:2]); err != nil {
-		return
-	}
-
-	switch sig.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
-		sig.RSASignature.bytes, sig.RSASignature.bitLength, err = readMPI(r)
-	case PubKeyAlgoDSA:
-		if sig.DSASigR.bytes, sig.DSASigR.bitLength, err = readMPI(r); err != nil {
-			return
-		}
-		sig.DSASigS.bytes, sig.DSASigS.bitLength, err = readMPI(r)
-	default:
-		panic("unreachable")
-	}
-	return
-}
-
-// Serialize marshals sig to w. Sign, SignUserId or SignKey must have been
-// called first.
-func (sig *SignatureV3) Serialize(w io.Writer) (err error) {
-	buf := make([]byte, 8)
-
-	// Write the sig type and creation time
-	buf[0] = byte(sig.SigType)
-	binary.BigEndian.PutUint32(buf[1:5], uint32(sig.CreationTime.Unix()))
-	if _, err = w.Write(buf[:5]); err != nil {
-		return
-	}
-
-	// Write the issuer long key ID
-	binary.BigEndian.PutUint64(buf[:8], sig.IssuerKeyId)
-	if _, err = w.Write(buf[:8]); err != nil {
-		return
-	}
-
-	// Write public key algorithm, hash ID, and hash value
-	buf[0] = byte(sig.PubKeyAlgo)
-	hashId, ok := s2k.HashToHashId(sig.Hash)
-	if !ok {
-		return errors.UnsupportedError(fmt.Sprintf("hash function %v", sig.Hash))
-	}
-	buf[1] = hashId
-	copy(buf[2:4], sig.HashTag[:])
-	if _, err = w.Write(buf[:4]); err != nil {
-		return
-	}
-
-	if sig.RSASignature.bytes == nil && sig.DSASigR.bytes == nil {
-		return errors.InvalidArgumentError("Signature: need to call Sign, SignUserId or SignKey before Serialize")
-	}
-
-	switch sig.PubKeyAlgo {
-	case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
-		err = writeMPIs(w, sig.RSASignature)
-	case PubKeyAlgoDSA:
-		err = writeMPIs(w, sig.DSASigR, sig.DSASigS)
-	default:
-		panic("impossible")
-	}
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go b/vendor/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go
deleted file mode 100644
index 744c2d2c..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/symmetric_key_encrypted.go
+++ /dev/null
@@ -1,155 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"bytes"
-	"crypto/cipher"
-	"io"
-	"strconv"
-
-	"golang.org/x/crypto/openpgp/errors"
-	"golang.org/x/crypto/openpgp/s2k"
-)
-
-// This is the largest session key that we'll support. Since no 512-bit cipher
-// has even been seriously used, this is comfortably large.
-const maxSessionKeySizeInBytes = 64
-
-// SymmetricKeyEncrypted represents a passphrase protected session key. See RFC
-// 4880, section 5.3.
-type SymmetricKeyEncrypted struct {
-	CipherFunc   CipherFunction
-	s2k          func(out, in []byte)
-	encryptedKey []byte
-}
-
-const symmetricKeyEncryptedVersion = 4
-
-func (ske *SymmetricKeyEncrypted) parse(r io.Reader) error {
-	// RFC 4880, section 5.3.
-	var buf [2]byte
-	if _, err := readFull(r, buf[:]); err != nil {
-		return err
-	}
-	if buf[0] != symmetricKeyEncryptedVersion {
-		return errors.UnsupportedError("SymmetricKeyEncrypted version")
-	}
-	ske.CipherFunc = CipherFunction(buf[1])
-
-	if ske.CipherFunc.KeySize() == 0 {
-		return errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(buf[1])))
-	}
-
-	var err error
-	ske.s2k, err = s2k.Parse(r)
-	if err != nil {
-		return err
-	}
-
-	encryptedKey := make([]byte, maxSessionKeySizeInBytes)
-	// The session key may follow. We just have to try and read to find
-	// out. If it exists then we limit it to maxSessionKeySizeInBytes.
-	n, err := readFull(r, encryptedKey)
-	if err != nil && err != io.ErrUnexpectedEOF {
-		return err
-	}
-
-	if n != 0 {
-		if n == maxSessionKeySizeInBytes {
-			return errors.UnsupportedError("oversized encrypted session key")
-		}
-		ske.encryptedKey = encryptedKey[:n]
-	}
-
-	return nil
-}
-
-// Decrypt attempts to decrypt an encrypted session key and returns the key and
-// the cipher to use when decrypting a subsequent Symmetrically Encrypted Data
-// packet.
-func (ske *SymmetricKeyEncrypted) Decrypt(passphrase []byte) ([]byte, CipherFunction, error) {
-	key := make([]byte, ske.CipherFunc.KeySize())
-	ske.s2k(key, passphrase)
-
-	if len(ske.encryptedKey) == 0 {
-		return key, ske.CipherFunc, nil
-	}
-
-	// the IV is all zeros
-	iv := make([]byte, ske.CipherFunc.blockSize())
-	c := cipher.NewCFBDecrypter(ske.CipherFunc.new(key), iv)
-	plaintextKey := make([]byte, len(ske.encryptedKey))
-	c.XORKeyStream(plaintextKey, ske.encryptedKey)
-	cipherFunc := CipherFunction(plaintextKey[0])
-	if cipherFunc.blockSize() == 0 {
-		return nil, ske.CipherFunc, errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(cipherFunc)))
-	}
-	plaintextKey = plaintextKey[1:]
-	if l, cipherKeySize := len(plaintextKey), cipherFunc.KeySize(); l != cipherFunc.KeySize() {
-		return nil, cipherFunc, errors.StructuralError("length of decrypted key (" + strconv.Itoa(l) + ") " +
-			"not equal to cipher keysize (" + strconv.Itoa(cipherKeySize) + ")")
-	}
-	return plaintextKey, cipherFunc, nil
-}
-
-// SerializeSymmetricKeyEncrypted serializes a symmetric key packet to w. The
-// packet contains a random session key, encrypted by a key derived from the
-// given passphrase. The session key is returned and must be passed to
-// SerializeSymmetricallyEncrypted.
-// If config is nil, sensible defaults will be used.
-func SerializeSymmetricKeyEncrypted(w io.Writer, passphrase []byte, config *Config) (key []byte, err error) {
-	cipherFunc := config.Cipher()
-	keySize := cipherFunc.KeySize()
-	if keySize == 0 {
-		return nil, errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(cipherFunc)))
-	}
-
-	s2kBuf := new(bytes.Buffer)
-	keyEncryptingKey := make([]byte, keySize)
-	// s2k.Serialize salts and stretches the passphrase, and writes the
-	// resulting key to keyEncryptingKey and the s2k descriptor to s2kBuf.
-	err = s2k.Serialize(s2kBuf, keyEncryptingKey, config.Random(), passphrase, &s2k.Config{Hash: config.Hash(), S2KCount: config.PasswordHashIterations()})
-	if err != nil {
-		return
-	}
-	s2kBytes := s2kBuf.Bytes()
-
-	packetLength := 2 /* header */ + len(s2kBytes) + 1 /* cipher type */ + keySize
-	err = serializeHeader(w, packetTypeSymmetricKeyEncrypted, packetLength)
-	if err != nil {
-		return
-	}
-
-	var buf [2]byte
-	buf[0] = symmetricKeyEncryptedVersion
-	buf[1] = byte(cipherFunc)
-	_, err = w.Write(buf[:])
-	if err != nil {
-		return
-	}
-	_, err = w.Write(s2kBytes)
-	if err != nil {
-		return
-	}
-
-	sessionKey := make([]byte, keySize)
-	_, err = io.ReadFull(config.Random(), sessionKey)
-	if err != nil {
-		return
-	}
-	iv := make([]byte, cipherFunc.blockSize())
-	c := cipher.NewCFBEncrypter(cipherFunc.new(keyEncryptingKey), iv)
-	encryptedCipherAndKey := make([]byte, keySize+1)
-	c.XORKeyStream(encryptedCipherAndKey, buf[1:])
-	c.XORKeyStream(encryptedCipherAndKey[1:], sessionKey)
-	_, err = w.Write(encryptedCipherAndKey)
-	if err != nil {
-		return
-	}
-
-	key = sessionKey
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go b/vendor/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go
deleted file mode 100644
index 6126030e..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/symmetrically_encrypted.go
+++ /dev/null
@@ -1,290 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"crypto/cipher"
-	"crypto/sha1"
-	"crypto/subtle"
-	"golang.org/x/crypto/openpgp/errors"
-	"hash"
-	"io"
-	"strconv"
-)
-
-// SymmetricallyEncrypted represents a symmetrically encrypted byte string. The
-// encrypted contents will consist of more OpenPGP packets. See RFC 4880,
-// sections 5.7 and 5.13.
-type SymmetricallyEncrypted struct {
-	MDC      bool // true iff this is a type 18 packet and thus has an embedded MAC.
-	contents io.Reader
-	prefix   []byte
-}
-
-const symmetricallyEncryptedVersion = 1
-
-func (se *SymmetricallyEncrypted) parse(r io.Reader) error {
-	if se.MDC {
-		// See RFC 4880, section 5.13.
-		var buf [1]byte
-		_, err := readFull(r, buf[:])
-		if err != nil {
-			return err
-		}
-		if buf[0] != symmetricallyEncryptedVersion {
-			return errors.UnsupportedError("unknown SymmetricallyEncrypted version")
-		}
-	}
-	se.contents = r
-	return nil
-}
-
-// Decrypt returns a ReadCloser, from which the decrypted contents of the
-// packet can be read. An incorrect key can, with high probability, be detected
-// immediately and this will result in a KeyIncorrect error being returned.
-func (se *SymmetricallyEncrypted) Decrypt(c CipherFunction, key []byte) (io.ReadCloser, error) {
-	keySize := c.KeySize()
-	if keySize == 0 {
-		return nil, errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(c)))
-	}
-	if len(key) != keySize {
-		return nil, errors.InvalidArgumentError("SymmetricallyEncrypted: incorrect key length")
-	}
-
-	if se.prefix == nil {
-		se.prefix = make([]byte, c.blockSize()+2)
-		_, err := readFull(se.contents, se.prefix)
-		if err != nil {
-			return nil, err
-		}
-	} else if len(se.prefix) != c.blockSize()+2 {
-		return nil, errors.InvalidArgumentError("can't try ciphers with different block lengths")
-	}
-
-	ocfbResync := OCFBResync
-	if se.MDC {
-		// MDC packets use a different form of OCFB mode.
-		ocfbResync = OCFBNoResync
-	}
-
-	s := NewOCFBDecrypter(c.new(key), se.prefix, ocfbResync)
-	if s == nil {
-		return nil, errors.ErrKeyIncorrect
-	}
-
-	plaintext := cipher.StreamReader{S: s, R: se.contents}
-
-	if se.MDC {
-		// MDC packets have an embedded hash that we need to check.
-		h := sha1.New()
-		h.Write(se.prefix)
-		return &seMDCReader{in: plaintext, h: h}, nil
-	}
-
-	// Otherwise, we just need to wrap plaintext so that it's a valid ReadCloser.
-	return seReader{plaintext}, nil
-}
-
-// seReader wraps an io.Reader with a no-op Close method.
-type seReader struct {
-	in io.Reader
-}
-
-func (ser seReader) Read(buf []byte) (int, error) {
-	return ser.in.Read(buf)
-}
-
-func (ser seReader) Close() error {
-	return nil
-}
-
-const mdcTrailerSize = 1 /* tag byte */ + 1 /* length byte */ + sha1.Size
-
-// An seMDCReader wraps an io.Reader, maintains a running hash and keeps hold
-// of the most recent 22 bytes (mdcTrailerSize). Upon EOF, those bytes form an
-// MDC packet containing a hash of the previous contents which is checked
-// against the running hash. See RFC 4880, section 5.13.
-type seMDCReader struct {
-	in          io.Reader
-	h           hash.Hash
-	trailer     [mdcTrailerSize]byte
-	scratch     [mdcTrailerSize]byte
-	trailerUsed int
-	error       bool
-	eof         bool
-}
-
-func (ser *seMDCReader) Read(buf []byte) (n int, err error) {
-	if ser.error {
-		err = io.ErrUnexpectedEOF
-		return
-	}
-	if ser.eof {
-		err = io.EOF
-		return
-	}
-
-	// If we haven't yet filled the trailer buffer then we must do that
-	// first.
-	for ser.trailerUsed < mdcTrailerSize {
-		n, err = ser.in.Read(ser.trailer[ser.trailerUsed:])
-		ser.trailerUsed += n
-		if err == io.EOF {
-			if ser.trailerUsed != mdcTrailerSize {
-				n = 0
-				err = io.ErrUnexpectedEOF
-				ser.error = true
-				return
-			}
-			ser.eof = true
-			n = 0
-			return
-		}
-
-		if err != nil {
-			n = 0
-			return
-		}
-	}
-
-	// If it's a short read then we read into a temporary buffer and shift
-	// the data into the caller's buffer.
-	if len(buf) <= mdcTrailerSize {
-		n, err = readFull(ser.in, ser.scratch[:len(buf)])
-		copy(buf, ser.trailer[:n])
-		ser.h.Write(buf[:n])
-		copy(ser.trailer[:], ser.trailer[n:])
-		copy(ser.trailer[mdcTrailerSize-n:], ser.scratch[:])
-		if n < len(buf) {
-			ser.eof = true
-			err = io.EOF
-		}
-		return
-	}
-
-	n, err = ser.in.Read(buf[mdcTrailerSize:])
-	copy(buf, ser.trailer[:])
-	ser.h.Write(buf[:n])
-	copy(ser.trailer[:], buf[n:])
-
-	if err == io.EOF {
-		ser.eof = true
-	}
-	return
-}
-
-// This is a new-format packet tag byte for a type 19 (MDC) packet.
-const mdcPacketTagByte = byte(0x80) | 0x40 | 19
-
-func (ser *seMDCReader) Close() error {
-	if ser.error {
-		return errors.SignatureError("error during reading")
-	}
-
-	for !ser.eof {
-		// We haven't seen EOF so we need to read to the end
-		var buf [1024]byte
-		_, err := ser.Read(buf[:])
-		if err == io.EOF {
-			break
-		}
-		if err != nil {
-			return errors.SignatureError("error during reading")
-		}
-	}
-
-	if ser.trailer[0] != mdcPacketTagByte || ser.trailer[1] != sha1.Size {
-		return errors.SignatureError("MDC packet not found")
-	}
-	ser.h.Write(ser.trailer[:2])
-
-	final := ser.h.Sum(nil)
-	if subtle.ConstantTimeCompare(final, ser.trailer[2:]) != 1 {
-		return errors.SignatureError("hash mismatch")
-	}
-	return nil
-}
-
-// An seMDCWriter writes through to an io.WriteCloser while maintains a running
-// hash of the data written. On close, it emits an MDC packet containing the
-// running hash.
-type seMDCWriter struct {
-	w io.WriteCloser
-	h hash.Hash
-}
-
-func (w *seMDCWriter) Write(buf []byte) (n int, err error) {
-	w.h.Write(buf)
-	return w.w.Write(buf)
-}
-
-func (w *seMDCWriter) Close() (err error) {
-	var buf [mdcTrailerSize]byte
-
-	buf[0] = mdcPacketTagByte
-	buf[1] = sha1.Size
-	w.h.Write(buf[:2])
-	digest := w.h.Sum(nil)
-	copy(buf[2:], digest)
-
-	_, err = w.w.Write(buf[:])
-	if err != nil {
-		return
-	}
-	return w.w.Close()
-}
-
-// noOpCloser is like an ioutil.NopCloser, but for an io.Writer.
-type noOpCloser struct {
-	w io.Writer
-}
-
-func (c noOpCloser) Write(data []byte) (n int, err error) {
-	return c.w.Write(data)
-}
-
-func (c noOpCloser) Close() error {
-	return nil
-}
-
-// SerializeSymmetricallyEncrypted serializes a symmetrically encrypted packet
-// to w and returns a WriteCloser to which the to-be-encrypted packets can be
-// written.
-// If config is nil, sensible defaults will be used.
-func SerializeSymmetricallyEncrypted(w io.Writer, c CipherFunction, key []byte, config *Config) (contents io.WriteCloser, err error) {
-	if c.KeySize() != len(key) {
-		return nil, errors.InvalidArgumentError("SymmetricallyEncrypted.Serialize: bad key length")
-	}
-	writeCloser := noOpCloser{w}
-	ciphertext, err := serializeStreamHeader(writeCloser, packetTypeSymmetricallyEncryptedMDC)
-	if err != nil {
-		return
-	}
-
-	_, err = ciphertext.Write([]byte{symmetricallyEncryptedVersion})
-	if err != nil {
-		return
-	}
-
-	block := c.new(key)
-	blockSize := block.BlockSize()
-	iv := make([]byte, blockSize)
-	_, err = config.Random().Read(iv)
-	if err != nil {
-		return
-	}
-	s, prefix := NewOCFBEncrypter(block, iv, OCFBNoResync)
-	_, err = ciphertext.Write(prefix)
-	if err != nil {
-		return
-	}
-	plaintext := cipher.StreamWriter{S: s, W: ciphertext}
-
-	h := sha1.New()
-	h.Write(iv)
-	h.Write(iv[blockSize-2:])
-	contents = &seMDCWriter{w: plaintext, h: h}
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go b/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go
deleted file mode 100644
index 96a2b382..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/userattribute.go
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright 2013 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"bytes"
-	"image"
-	"image/jpeg"
-	"io"
-	"io/ioutil"
-)
-
-const UserAttrImageSubpacket = 1
-
-// UserAttribute is capable of storing other types of data about a user
-// beyond name, email and a text comment. In practice, user attributes are typically used
-// to store a signed thumbnail photo JPEG image of the user.
-// See RFC 4880, section 5.12.
-type UserAttribute struct {
-	Contents []*OpaqueSubpacket
-}
-
-// NewUserAttributePhoto creates a user attribute packet
-// containing the given images.
-func NewUserAttributePhoto(photos ...image.Image) (uat *UserAttribute, err error) {
-	uat = new(UserAttribute)
-	for _, photo := range photos {
-		var buf bytes.Buffer
-		// RFC 4880, Section 5.12.1.
-		data := []byte{
-			0x10, 0x00, // Little-endian image header length (16 bytes)
-			0x01,       // Image header version 1
-			0x01,       // JPEG
-			0, 0, 0, 0, // 12 reserved octets, must be all zero.
-			0, 0, 0, 0,
-			0, 0, 0, 0}
-		if _, err = buf.Write(data); err != nil {
-			return
-		}
-		if err = jpeg.Encode(&buf, photo, nil); err != nil {
-			return
-		}
-		uat.Contents = append(uat.Contents, &OpaqueSubpacket{
-			SubType:  UserAttrImageSubpacket,
-			Contents: buf.Bytes()})
-	}
-	return
-}
-
-// NewUserAttribute creates a new user attribute packet containing the given subpackets.
-func NewUserAttribute(contents ...*OpaqueSubpacket) *UserAttribute {
-	return &UserAttribute{Contents: contents}
-}
-
-func (uat *UserAttribute) parse(r io.Reader) (err error) {
-	// RFC 4880, section 5.13
-	b, err := ioutil.ReadAll(r)
-	if err != nil {
-		return
-	}
-	uat.Contents, err = OpaqueSubpackets(b)
-	return
-}
-
-// Serialize marshals the user attribute to w in the form of an OpenPGP packet, including
-// header.
-func (uat *UserAttribute) Serialize(w io.Writer) (err error) {
-	var buf bytes.Buffer
-	for _, sp := range uat.Contents {
-		sp.Serialize(&buf)
-	}
-	if err = serializeHeader(w, packetTypeUserAttribute, buf.Len()); err != nil {
-		return err
-	}
-	_, err = w.Write(buf.Bytes())
-	return
-}
-
-// ImageData returns zero or more byte slices, each containing
-// JPEG File Interchange Format (JFIF), for each photo in the
-// the user attribute packet.
-func (uat *UserAttribute) ImageData() (imageData [][]byte) {
-	for _, sp := range uat.Contents {
-		if sp.SubType == UserAttrImageSubpacket && len(sp.Contents) > 16 {
-			imageData = append(imageData, sp.Contents[16:])
-		}
-	}
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/packet/userid.go b/vendor/golang.org/x/crypto/openpgp/packet/userid.go
deleted file mode 100644
index d6bea7d4..00000000
--- a/vendor/golang.org/x/crypto/openpgp/packet/userid.go
+++ /dev/null
@@ -1,160 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package packet
-
-import (
-	"io"
-	"io/ioutil"
-	"strings"
-)
-
-// UserId contains text that is intended to represent the name and email
-// address of the key holder. See RFC 4880, section 5.11. By convention, this
-// takes the form "Full Name (Comment) <email@example.com>"
-type UserId struct {
-	Id string // By convention, this takes the form "Full Name (Comment) <email@example.com>" which is split out in the fields below.
-
-	Name, Comment, Email string
-}
-
-func hasInvalidCharacters(s string) bool {
-	for _, c := range s {
-		switch c {
-		case '(', ')', '<', '>', 0:
-			return true
-		}
-	}
-	return false
-}
-
-// NewUserId returns a UserId or nil if any of the arguments contain invalid
-// characters. The invalid characters are '\x00', '(', ')', '<' and '>'
-func NewUserId(name, comment, email string) *UserId {
-	// RFC 4880 doesn't deal with the structure of userid strings; the
-	// name, comment and email form is just a convention. However, there's
-	// no convention about escaping the metacharacters and GPG just refuses
-	// to create user ids where, say, the name contains a '('. We mirror
-	// this behaviour.
-
-	if hasInvalidCharacters(name) || hasInvalidCharacters(comment) || hasInvalidCharacters(email) {
-		return nil
-	}
-
-	uid := new(UserId)
-	uid.Name, uid.Comment, uid.Email = name, comment, email
-	uid.Id = name
-	if len(comment) > 0 {
-		if len(uid.Id) > 0 {
-			uid.Id += " "
-		}
-		uid.Id += "("
-		uid.Id += comment
-		uid.Id += ")"
-	}
-	if len(email) > 0 {
-		if len(uid.Id) > 0 {
-			uid.Id += " "
-		}
-		uid.Id += "<"
-		uid.Id += email
-		uid.Id += ">"
-	}
-	return uid
-}
-
-func (uid *UserId) parse(r io.Reader) (err error) {
-	// RFC 4880, section 5.11
-	b, err := ioutil.ReadAll(r)
-	if err != nil {
-		return
-	}
-	uid.Id = string(b)
-	uid.Name, uid.Comment, uid.Email = parseUserId(uid.Id)
-	return
-}
-
-// Serialize marshals uid to w in the form of an OpenPGP packet, including
-// header.
-func (uid *UserId) Serialize(w io.Writer) error {
-	err := serializeHeader(w, packetTypeUserId, len(uid.Id))
-	if err != nil {
-		return err
-	}
-	_, err = w.Write([]byte(uid.Id))
-	return err
-}
-
-// parseUserId extracts the name, comment and email from a user id string that
-// is formatted as "Full Name (Comment) <email@example.com>".
-func parseUserId(id string) (name, comment, email string) {
-	var n, c, e struct {
-		start, end int
-	}
-	var state int
-
-	for offset, rune := range id {
-		switch state {
-		case 0:
-			// Entering name
-			n.start = offset
-			state = 1
-			fallthrough
-		case 1:
-			// In name
-			if rune == '(' {
-				state = 2
-				n.end = offset
-			} else if rune == '<' {
-				state = 5
-				n.end = offset
-			}
-		case 2:
-			// Entering comment
-			c.start = offset
-			state = 3
-			fallthrough
-		case 3:
-			// In comment
-			if rune == ')' {
-				state = 4
-				c.end = offset
-			}
-		case 4:
-			// Between comment and email
-			if rune == '<' {
-				state = 5
-			}
-		case 5:
-			// Entering email
-			e.start = offset
-			state = 6
-			fallthrough
-		case 6:
-			// In email
-			if rune == '>' {
-				state = 7
-				e.end = offset
-			}
-		default:
-			// After email
-		}
-	}
-	switch state {
-	case 1:
-		// ended in the name
-		n.end = len(id)
-	case 3:
-		// ended in comment
-		c.end = len(id)
-	case 6:
-		// ended in email
-		e.end = len(id)
-	}
-
-	name = strings.TrimSpace(id[n.start:n.end])
-	comment = strings.TrimSpace(id[c.start:c.end])
-	email = strings.TrimSpace(id[e.start:e.end])
-	return
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/read.go b/vendor/golang.org/x/crypto/openpgp/read.go
deleted file mode 100644
index 6ec664f4..00000000
--- a/vendor/golang.org/x/crypto/openpgp/read.go
+++ /dev/null
@@ -1,442 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package openpgp implements high level operations on OpenPGP messages.
-package openpgp // import "golang.org/x/crypto/openpgp"
-
-import (
-	"crypto"
-	_ "crypto/sha256"
-	"hash"
-	"io"
-	"strconv"
-
-	"golang.org/x/crypto/openpgp/armor"
-	"golang.org/x/crypto/openpgp/errors"
-	"golang.org/x/crypto/openpgp/packet"
-)
-
-// SignatureType is the armor type for a PGP signature.
-var SignatureType = "PGP SIGNATURE"
-
-// readArmored reads an armored block with the given type.
-func readArmored(r io.Reader, expectedType string) (body io.Reader, err error) {
-	block, err := armor.Decode(r)
-	if err != nil {
-		return
-	}
-
-	if block.Type != expectedType {
-		return nil, errors.InvalidArgumentError("expected '" + expectedType + "', got: " + block.Type)
-	}
-
-	return block.Body, nil
-}
-
-// MessageDetails contains the result of parsing an OpenPGP encrypted and/or
-// signed message.
-type MessageDetails struct {
-	IsEncrypted              bool                // true if the message was encrypted.
-	EncryptedToKeyIds        []uint64            // the list of recipient key ids.
-	IsSymmetricallyEncrypted bool                // true if a passphrase could have decrypted the message.
-	DecryptedWith            Key                 // the private key used to decrypt the message, if any.
-	IsSigned                 bool                // true if the message is signed.
-	SignedByKeyId            uint64              // the key id of the signer, if any.
-	SignedBy                 *Key                // the key of the signer, if available.
-	LiteralData              *packet.LiteralData // the metadata of the contents
-	UnverifiedBody           io.Reader           // the contents of the message.
-
-	// If IsSigned is true and SignedBy is non-zero then the signature will
-	// be verified as UnverifiedBody is read. The signature cannot be
-	// checked until the whole of UnverifiedBody is read so UnverifiedBody
-	// must be consumed until EOF before the data can be trusted. Even if a
-	// message isn't signed (or the signer is unknown) the data may contain
-	// an authentication code that is only checked once UnverifiedBody has
-	// been consumed. Once EOF has been seen, the following fields are
-	// valid. (An authentication code failure is reported as a
-	// SignatureError error when reading from UnverifiedBody.)
-	SignatureError error               // nil if the signature is good.
-	Signature      *packet.Signature   // the signature packet itself, if v4 (default)
-	SignatureV3    *packet.SignatureV3 // the signature packet if it is a v2 or v3 signature
-
-	decrypted io.ReadCloser
-}
-
-// A PromptFunction is used as a callback by functions that may need to decrypt
-// a private key, or prompt for a passphrase. It is called with a list of
-// acceptable, encrypted private keys and a boolean that indicates whether a
-// passphrase is usable. It should either decrypt a private key or return a
-// passphrase to try. If the decrypted private key or given passphrase isn't
-// correct, the function will be called again, forever. Any error returned will
-// be passed up.
-type PromptFunction func(keys []Key, symmetric bool) ([]byte, error)
-
-// A keyEnvelopePair is used to store a private key with the envelope that
-// contains a symmetric key, encrypted with that key.
-type keyEnvelopePair struct {
-	key          Key
-	encryptedKey *packet.EncryptedKey
-}
-
-// ReadMessage parses an OpenPGP message that may be signed and/or encrypted.
-// The given KeyRing should contain both public keys (for signature
-// verification) and, possibly encrypted, private keys for decrypting.
-// If config is nil, sensible defaults will be used.
-func ReadMessage(r io.Reader, keyring KeyRing, prompt PromptFunction, config *packet.Config) (md *MessageDetails, err error) {
-	var p packet.Packet
-
-	var symKeys []*packet.SymmetricKeyEncrypted
-	var pubKeys []keyEnvelopePair
-	var se *packet.SymmetricallyEncrypted
-
-	packets := packet.NewReader(r)
-	md = new(MessageDetails)
-	md.IsEncrypted = true
-
-	// The message, if encrypted, starts with a number of packets
-	// containing an encrypted decryption key. The decryption key is either
-	// encrypted to a public key, or with a passphrase. This loop
-	// collects these packets.
-ParsePackets:
-	for {
-		p, err = packets.Next()
-		if err != nil {
-			return nil, err
-		}
-		switch p := p.(type) {
-		case *packet.SymmetricKeyEncrypted:
-			// This packet contains the decryption key encrypted with a passphrase.
-			md.IsSymmetricallyEncrypted = true
-			symKeys = append(symKeys, p)
-		case *packet.EncryptedKey:
-			// This packet contains the decryption key encrypted to a public key.
-			md.EncryptedToKeyIds = append(md.EncryptedToKeyIds, p.KeyId)
-			switch p.Algo {
-			case packet.PubKeyAlgoRSA, packet.PubKeyAlgoRSAEncryptOnly, packet.PubKeyAlgoElGamal:
-				break
-			default:
-				continue
-			}
-			var keys []Key
-			if p.KeyId == 0 {
-				keys = keyring.DecryptionKeys()
-			} else {
-				keys = keyring.KeysById(p.KeyId)
-			}
-			for _, k := range keys {
-				pubKeys = append(pubKeys, keyEnvelopePair{k, p})
-			}
-		case *packet.SymmetricallyEncrypted:
-			se = p
-			break ParsePackets
-		case *packet.Compressed, *packet.LiteralData, *packet.OnePassSignature:
-			// This message isn't encrypted.
-			if len(symKeys) != 0 || len(pubKeys) != 0 {
-				return nil, errors.StructuralError("key material not followed by encrypted message")
-			}
-			packets.Unread(p)
-			return readSignedMessage(packets, nil, keyring)
-		}
-	}
-
-	var candidates []Key
-	var decrypted io.ReadCloser
-
-	// Now that we have the list of encrypted keys we need to decrypt at
-	// least one of them or, if we cannot, we need to call the prompt
-	// function so that it can decrypt a key or give us a passphrase.
-FindKey:
-	for {
-		// See if any of the keys already have a private key available
-		candidates = candidates[:0]
-		candidateFingerprints := make(map[string]bool)
-
-		for _, pk := range pubKeys {
-			if pk.key.PrivateKey == nil {
-				continue
-			}
-			if !pk.key.PrivateKey.Encrypted {
-				if len(pk.encryptedKey.Key) == 0 {
-					pk.encryptedKey.Decrypt(pk.key.PrivateKey, config)
-				}
-				if len(pk.encryptedKey.Key) == 0 {
-					continue
-				}
-				decrypted, err = se.Decrypt(pk.encryptedKey.CipherFunc, pk.encryptedKey.Key)
-				if err != nil && err != errors.ErrKeyIncorrect {
-					return nil, err
-				}
-				if decrypted != nil {
-					md.DecryptedWith = pk.key
-					break FindKey
-				}
-			} else {
-				fpr := string(pk.key.PublicKey.Fingerprint[:])
-				if v := candidateFingerprints[fpr]; v {
-					continue
-				}
-				candidates = append(candidates, pk.key)
-				candidateFingerprints[fpr] = true
-			}
-		}
-
-		if len(candidates) == 0 && len(symKeys) == 0 {
-			return nil, errors.ErrKeyIncorrect
-		}
-
-		if prompt == nil {
-			return nil, errors.ErrKeyIncorrect
-		}
-
-		passphrase, err := prompt(candidates, len(symKeys) != 0)
-		if err != nil {
-			return nil, err
-		}
-
-		// Try the symmetric passphrase first
-		if len(symKeys) != 0 && passphrase != nil {
-			for _, s := range symKeys {
-				key, cipherFunc, err := s.Decrypt(passphrase)
-				if err == nil {
-					decrypted, err = se.Decrypt(cipherFunc, key)
-					if err != nil && err != errors.ErrKeyIncorrect {
-						return nil, err
-					}
-					if decrypted != nil {
-						break FindKey
-					}
-				}
-
-			}
-		}
-	}
-
-	md.decrypted = decrypted
-	if err := packets.Push(decrypted); err != nil {
-		return nil, err
-	}
-	return readSignedMessage(packets, md, keyring)
-}
-
-// readSignedMessage reads a possibly signed message if mdin is non-zero then
-// that structure is updated and returned. Otherwise a fresh MessageDetails is
-// used.
-func readSignedMessage(packets *packet.Reader, mdin *MessageDetails, keyring KeyRing) (md *MessageDetails, err error) {
-	if mdin == nil {
-		mdin = new(MessageDetails)
-	}
-	md = mdin
-
-	var p packet.Packet
-	var h hash.Hash
-	var wrappedHash hash.Hash
-FindLiteralData:
-	for {
-		p, err = packets.Next()
-		if err != nil {
-			return nil, err
-		}
-		switch p := p.(type) {
-		case *packet.Compressed:
-			if err := packets.Push(p.Body); err != nil {
-				return nil, err
-			}
-		case *packet.OnePassSignature:
-			if !p.IsLast {
-				return nil, errors.UnsupportedError("nested signatures")
-			}
-
-			h, wrappedHash, err = hashForSignature(p.Hash, p.SigType)
-			if err != nil {
-				md = nil
-				return
-			}
-
-			md.IsSigned = true
-			md.SignedByKeyId = p.KeyId
-			keys := keyring.KeysByIdUsage(p.KeyId, packet.KeyFlagSign)
-			if len(keys) > 0 {
-				md.SignedBy = &keys[0]
-			}
-		case *packet.LiteralData:
-			md.LiteralData = p
-			break FindLiteralData
-		}
-	}
-
-	if md.SignedBy != nil {
-		md.UnverifiedBody = &signatureCheckReader{packets, h, wrappedHash, md}
-	} else if md.decrypted != nil {
-		md.UnverifiedBody = checkReader{md}
-	} else {
-		md.UnverifiedBody = md.LiteralData.Body
-	}
-
-	return md, nil
-}
-
-// hashForSignature returns a pair of hashes that can be used to verify a
-// signature. The signature may specify that the contents of the signed message
-// should be preprocessed (i.e. to normalize line endings). Thus this function
-// returns two hashes. The second should be used to hash the message itself and
-// performs any needed preprocessing.
-func hashForSignature(hashId crypto.Hash, sigType packet.SignatureType) (hash.Hash, hash.Hash, error) {
-	if !hashId.Available() {
-		return nil, nil, errors.UnsupportedError("hash not available: " + strconv.Itoa(int(hashId)))
-	}
-	h := hashId.New()
-
-	switch sigType {
-	case packet.SigTypeBinary:
-		return h, h, nil
-	case packet.SigTypeText:
-		return h, NewCanonicalTextHash(h), nil
-	}
-
-	return nil, nil, errors.UnsupportedError("unsupported signature type: " + strconv.Itoa(int(sigType)))
-}
-
-// checkReader wraps an io.Reader from a LiteralData packet. When it sees EOF
-// it closes the ReadCloser from any SymmetricallyEncrypted packet to trigger
-// MDC checks.
-type checkReader struct {
-	md *MessageDetails
-}
-
-func (cr checkReader) Read(buf []byte) (n int, err error) {
-	n, err = cr.md.LiteralData.Body.Read(buf)
-	if err == io.EOF {
-		mdcErr := cr.md.decrypted.Close()
-		if mdcErr != nil {
-			err = mdcErr
-		}
-	}
-	return
-}
-
-// signatureCheckReader wraps an io.Reader from a LiteralData packet and hashes
-// the data as it is read. When it sees an EOF from the underlying io.Reader
-// it parses and checks a trailing Signature packet and triggers any MDC checks.
-type signatureCheckReader struct {
-	packets        *packet.Reader
-	h, wrappedHash hash.Hash
-	md             *MessageDetails
-}
-
-func (scr *signatureCheckReader) Read(buf []byte) (n int, err error) {
-	n, err = scr.md.LiteralData.Body.Read(buf)
-	scr.wrappedHash.Write(buf[:n])
-	if err == io.EOF {
-		var p packet.Packet
-		p, scr.md.SignatureError = scr.packets.Next()
-		if scr.md.SignatureError != nil {
-			return
-		}
-
-		var ok bool
-		if scr.md.Signature, ok = p.(*packet.Signature); ok {
-			scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignature(scr.h, scr.md.Signature)
-		} else if scr.md.SignatureV3, ok = p.(*packet.SignatureV3); ok {
-			scr.md.SignatureError = scr.md.SignedBy.PublicKey.VerifySignatureV3(scr.h, scr.md.SignatureV3)
-		} else {
-			scr.md.SignatureError = errors.StructuralError("LiteralData not followed by Signature")
-			return
-		}
-
-		// The SymmetricallyEncrypted packet, if any, might have an
-		// unsigned hash of its own. In order to check this we need to
-		// close that Reader.
-		if scr.md.decrypted != nil {
-			mdcErr := scr.md.decrypted.Close()
-			if mdcErr != nil {
-				err = mdcErr
-			}
-		}
-	}
-	return
-}
-
-// CheckDetachedSignature takes a signed file and a detached signature and
-// returns the signer if the signature is valid. If the signer isn't known,
-// ErrUnknownIssuer is returned.
-func CheckDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signer *Entity, err error) {
-	var issuerKeyId uint64
-	var hashFunc crypto.Hash
-	var sigType packet.SignatureType
-	var keys []Key
-	var p packet.Packet
-
-	packets := packet.NewReader(signature)
-	for {
-		p, err = packets.Next()
-		if err == io.EOF {
-			return nil, errors.ErrUnknownIssuer
-		}
-		if err != nil {
-			return nil, err
-		}
-
-		switch sig := p.(type) {
-		case *packet.Signature:
-			if sig.IssuerKeyId == nil {
-				return nil, errors.StructuralError("signature doesn't have an issuer")
-			}
-			issuerKeyId = *sig.IssuerKeyId
-			hashFunc = sig.Hash
-			sigType = sig.SigType
-		case *packet.SignatureV3:
-			issuerKeyId = sig.IssuerKeyId
-			hashFunc = sig.Hash
-			sigType = sig.SigType
-		default:
-			return nil, errors.StructuralError("non signature packet found")
-		}
-
-		keys = keyring.KeysByIdUsage(issuerKeyId, packet.KeyFlagSign)
-		if len(keys) > 0 {
-			break
-		}
-	}
-
-	if len(keys) == 0 {
-		panic("unreachable")
-	}
-
-	h, wrappedHash, err := hashForSignature(hashFunc, sigType)
-	if err != nil {
-		return nil, err
-	}
-
-	if _, err := io.Copy(wrappedHash, signed); err != nil && err != io.EOF {
-		return nil, err
-	}
-
-	for _, key := range keys {
-		switch sig := p.(type) {
-		case *packet.Signature:
-			err = key.PublicKey.VerifySignature(h, sig)
-		case *packet.SignatureV3:
-			err = key.PublicKey.VerifySignatureV3(h, sig)
-		default:
-			panic("unreachable")
-		}
-
-		if err == nil {
-			return key.Entity, nil
-		}
-	}
-
-	return nil, err
-}
-
-// CheckArmoredDetachedSignature performs the same actions as
-// CheckDetachedSignature but expects the signature to be armored.
-func CheckArmoredDetachedSignature(keyring KeyRing, signed, signature io.Reader) (signer *Entity, err error) {
-	body, err := readArmored(signature, SignatureType)
-	if err != nil {
-		return
-	}
-
-	return CheckDetachedSignature(keyring, signed, body)
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go b/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go
deleted file mode 100644
index 4b9a44ca..00000000
--- a/vendor/golang.org/x/crypto/openpgp/s2k/s2k.go
+++ /dev/null
@@ -1,273 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package s2k implements the various OpenPGP string-to-key transforms as
-// specified in RFC 4800 section 3.7.1.
-package s2k // import "golang.org/x/crypto/openpgp/s2k"
-
-import (
-	"crypto"
-	"hash"
-	"io"
-	"strconv"
-
-	"golang.org/x/crypto/openpgp/errors"
-)
-
-// Config collects configuration parameters for s2k key-stretching
-// transformatioms. A nil *Config is valid and results in all default
-// values. Currently, Config is used only by the Serialize function in
-// this package.
-type Config struct {
-	// Hash is the default hash function to be used. If
-	// nil, SHA1 is used.
-	Hash crypto.Hash
-	// S2KCount is only used for symmetric encryption. It
-	// determines the strength of the passphrase stretching when
-	// the said passphrase is hashed to produce a key. S2KCount
-	// should be between 1024 and 65011712, inclusive. If Config
-	// is nil or S2KCount is 0, the value 65536 used. Not all
-	// values in the above range can be represented. S2KCount will
-	// be rounded up to the next representable value if it cannot
-	// be encoded exactly. When set, it is strongly encrouraged to
-	// use a value that is at least 65536. See RFC 4880 Section
-	// 3.7.1.3.
-	S2KCount int
-}
-
-func (c *Config) hash() crypto.Hash {
-	if c == nil || uint(c.Hash) == 0 {
-		// SHA1 is the historical default in this package.
-		return crypto.SHA1
-	}
-
-	return c.Hash
-}
-
-func (c *Config) encodedCount() uint8 {
-	if c == nil || c.S2KCount == 0 {
-		return 96 // The common case. Correspoding to 65536
-	}
-
-	i := c.S2KCount
-	switch {
-	// Behave like GPG. Should we make 65536 the lowest value used?
-	case i < 1024:
-		i = 1024
-	case i > 65011712:
-		i = 65011712
-	}
-
-	return encodeCount(i)
-}
-
-// encodeCount converts an iterative "count" in the range 1024 to
-// 65011712, inclusive, to an encoded count. The return value is the
-// octet that is actually stored in the GPG file. encodeCount panics
-// if i is not in the above range (encodedCount above takes care to
-// pass i in the correct range). See RFC 4880 Section 3.7.7.1.
-func encodeCount(i int) uint8 {
-	if i < 1024 || i > 65011712 {
-		panic("count arg i outside the required range")
-	}
-
-	for encoded := 0; encoded < 256; encoded++ {
-		count := decodeCount(uint8(encoded))
-		if count >= i {
-			return uint8(encoded)
-		}
-	}
-
-	return 255
-}
-
-// decodeCount returns the s2k mode 3 iterative "count" corresponding to
-// the encoded octet c.
-func decodeCount(c uint8) int {
-	return (16 + int(c&15)) << (uint32(c>>4) + 6)
-}
-
-// Simple writes to out the result of computing the Simple S2K function (RFC
-// 4880, section 3.7.1.1) using the given hash and input passphrase.
-func Simple(out []byte, h hash.Hash, in []byte) {
-	Salted(out, h, in, nil)
-}
-
-var zero [1]byte
-
-// Salted writes to out the result of computing the Salted S2K function (RFC
-// 4880, section 3.7.1.2) using the given hash, input passphrase and salt.
-func Salted(out []byte, h hash.Hash, in []byte, salt []byte) {
-	done := 0
-	var digest []byte
-
-	for i := 0; done < len(out); i++ {
-		h.Reset()
-		for j := 0; j < i; j++ {
-			h.Write(zero[:])
-		}
-		h.Write(salt)
-		h.Write(in)
-		digest = h.Sum(digest[:0])
-		n := copy(out[done:], digest)
-		done += n
-	}
-}
-
-// Iterated writes to out the result of computing the Iterated and Salted S2K
-// function (RFC 4880, section 3.7.1.3) using the given hash, input passphrase,
-// salt and iteration count.
-func Iterated(out []byte, h hash.Hash, in []byte, salt []byte, count int) {
-	combined := make([]byte, len(in)+len(salt))
-	copy(combined, salt)
-	copy(combined[len(salt):], in)
-
-	if count < len(combined) {
-		count = len(combined)
-	}
-
-	done := 0
-	var digest []byte
-	for i := 0; done < len(out); i++ {
-		h.Reset()
-		for j := 0; j < i; j++ {
-			h.Write(zero[:])
-		}
-		written := 0
-		for written < count {
-			if written+len(combined) > count {
-				todo := count - written
-				h.Write(combined[:todo])
-				written = count
-			} else {
-				h.Write(combined)
-				written += len(combined)
-			}
-		}
-		digest = h.Sum(digest[:0])
-		n := copy(out[done:], digest)
-		done += n
-	}
-}
-
-// Parse reads a binary specification for a string-to-key transformation from r
-// and returns a function which performs that transform.
-func Parse(r io.Reader) (f func(out, in []byte), err error) {
-	var buf [9]byte
-
-	_, err = io.ReadFull(r, buf[:2])
-	if err != nil {
-		return
-	}
-
-	hash, ok := HashIdToHash(buf[1])
-	if !ok {
-		return nil, errors.UnsupportedError("hash for S2K function: " + strconv.Itoa(int(buf[1])))
-	}
-	if !hash.Available() {
-		return nil, errors.UnsupportedError("hash not available: " + strconv.Itoa(int(hash)))
-	}
-	h := hash.New()
-
-	switch buf[0] {
-	case 0:
-		f := func(out, in []byte) {
-			Simple(out, h, in)
-		}
-		return f, nil
-	case 1:
-		_, err = io.ReadFull(r, buf[:8])
-		if err != nil {
-			return
-		}
-		f := func(out, in []byte) {
-			Salted(out, h, in, buf[:8])
-		}
-		return f, nil
-	case 3:
-		_, err = io.ReadFull(r, buf[:9])
-		if err != nil {
-			return
-		}
-		count := decodeCount(buf[8])
-		f := func(out, in []byte) {
-			Iterated(out, h, in, buf[:8], count)
-		}
-		return f, nil
-	}
-
-	return nil, errors.UnsupportedError("S2K function")
-}
-
-// Serialize salts and stretches the given passphrase and writes the
-// resulting key into key. It also serializes an S2K descriptor to
-// w. The key stretching can be configured with c, which may be
-// nil. In that case, sensible defaults will be used.
-func Serialize(w io.Writer, key []byte, rand io.Reader, passphrase []byte, c *Config) error {
-	var buf [11]byte
-	buf[0] = 3 /* iterated and salted */
-	buf[1], _ = HashToHashId(c.hash())
-	salt := buf[2:10]
-	if _, err := io.ReadFull(rand, salt); err != nil {
-		return err
-	}
-	encodedCount := c.encodedCount()
-	count := decodeCount(encodedCount)
-	buf[10] = encodedCount
-	if _, err := w.Write(buf[:]); err != nil {
-		return err
-	}
-
-	Iterated(key, c.hash().New(), passphrase, salt, count)
-	return nil
-}
-
-// hashToHashIdMapping contains pairs relating OpenPGP's hash identifier with
-// Go's crypto.Hash type. See RFC 4880, section 9.4.
-var hashToHashIdMapping = []struct {
-	id   byte
-	hash crypto.Hash
-	name string
-}{
-	{1, crypto.MD5, "MD5"},
-	{2, crypto.SHA1, "SHA1"},
-	{3, crypto.RIPEMD160, "RIPEMD160"},
-	{8, crypto.SHA256, "SHA256"},
-	{9, crypto.SHA384, "SHA384"},
-	{10, crypto.SHA512, "SHA512"},
-	{11, crypto.SHA224, "SHA224"},
-}
-
-// HashIdToHash returns a crypto.Hash which corresponds to the given OpenPGP
-// hash id.
-func HashIdToHash(id byte) (h crypto.Hash, ok bool) {
-	for _, m := range hashToHashIdMapping {
-		if m.id == id {
-			return m.hash, true
-		}
-	}
-	return 0, false
-}
-
-// HashIdToString returns the name of the hash function corresponding to the
-// given OpenPGP hash id.
-func HashIdToString(id byte) (name string, ok bool) {
-	for _, m := range hashToHashIdMapping {
-		if m.id == id {
-			return m.name, true
-		}
-	}
-
-	return "", false
-}
-
-// HashIdToHash returns an OpenPGP hash id which corresponds the given Hash.
-func HashToHashId(h crypto.Hash) (id byte, ok bool) {
-	for _, m := range hashToHashIdMapping {
-		if m.hash == h {
-			return m.id, true
-		}
-	}
-	return 0, false
-}
diff --git a/vendor/golang.org/x/crypto/openpgp/write.go b/vendor/golang.org/x/crypto/openpgp/write.go
deleted file mode 100644
index 65a304cc..00000000
--- a/vendor/golang.org/x/crypto/openpgp/write.go
+++ /dev/null
@@ -1,378 +0,0 @@
-// Copyright 2011 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-package openpgp
-
-import (
-	"crypto"
-	"hash"
-	"io"
-	"strconv"
-	"time"
-
-	"golang.org/x/crypto/openpgp/armor"
-	"golang.org/x/crypto/openpgp/errors"
-	"golang.org/x/crypto/openpgp/packet"
-	"golang.org/x/crypto/openpgp/s2k"
-)
-
-// DetachSign signs message with the private key from signer (which must
-// already have been decrypted) and writes the signature to w.
-// If config is nil, sensible defaults will be used.
-func DetachSign(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) error {
-	return detachSign(w, signer, message, packet.SigTypeBinary, config)
-}
-
-// ArmoredDetachSign signs message with the private key from signer (which
-// must already have been decrypted) and writes an armored signature to w.
-// If config is nil, sensible defaults will be used.
-func ArmoredDetachSign(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) (err error) {
-	return armoredDetachSign(w, signer, message, packet.SigTypeBinary, config)
-}
-
-// DetachSignText signs message (after canonicalising the line endings) with
-// the private key from signer (which must already have been decrypted) and
-// writes the signature to w.
-// If config is nil, sensible defaults will be used.
-func DetachSignText(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) error {
-	return detachSign(w, signer, message, packet.SigTypeText, config)
-}
-
-// ArmoredDetachSignText signs message (after canonicalising the line endings)
-// with the private key from signer (which must already have been decrypted)
-// and writes an armored signature to w.
-// If config is nil, sensible defaults will be used.
-func ArmoredDetachSignText(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) error {
-	return armoredDetachSign(w, signer, message, packet.SigTypeText, config)
-}
-
-func armoredDetachSign(w io.Writer, signer *Entity, message io.Reader, sigType packet.SignatureType, config *packet.Config) (err error) {
-	out, err := armor.Encode(w, SignatureType, nil)
-	if err != nil {
-		return
-	}
-	err = detachSign(out, signer, message, sigType, config)
-	if err != nil {
-		return
-	}
-	return out.Close()
-}
-
-func detachSign(w io.Writer, signer *Entity, message io.Reader, sigType packet.SignatureType, config *packet.Config) (err error) {
-	if signer.PrivateKey == nil {
-		return errors.InvalidArgumentError("signing key doesn't have a private key")
-	}
-	if signer.PrivateKey.Encrypted {
-		return errors.InvalidArgumentError("signing key is encrypted")
-	}
-
-	sig := new(packet.Signature)
-	sig.SigType = sigType
-	sig.PubKeyAlgo = signer.PrivateKey.PubKeyAlgo
-	sig.Hash = config.Hash()
-	sig.CreationTime = config.Now()
-	sig.IssuerKeyId = &signer.PrivateKey.KeyId
-
-	h, wrappedHash, err := hashForSignature(sig.Hash, sig.SigType)
-	if err != nil {
-		return
-	}
-	io.Copy(wrappedHash, message)
-
-	err = sig.Sign(h, signer.PrivateKey, config)
-	if err != nil {
-		return
-	}
-
-	return sig.Serialize(w)
-}
-
-// FileHints contains metadata about encrypted files. This metadata is, itself,
-// encrypted.
-type FileHints struct {
-	// IsBinary can be set to hint that the contents are binary data.
-	IsBinary bool
-	// FileName hints at the name of the file that should be written. It's
-	// truncated to 255 bytes if longer. It may be empty to suggest that the
-	// file should not be written to disk. It may be equal to "_CONSOLE" to
-	// suggest the data should not be written to disk.
-	FileName string
-	// ModTime contains the modification time of the file, or the zero time if not applicable.
-	ModTime time.Time
-}
-
-// SymmetricallyEncrypt acts like gpg -c: it encrypts a file with a passphrase.
-// The resulting WriteCloser must be closed after the contents of the file have
-// been written.
-// If config is nil, sensible defaults will be used.
-func SymmetricallyEncrypt(ciphertext io.Writer, passphrase []byte, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
-	if hints == nil {
-		hints = &FileHints{}
-	}
-
-	key, err := packet.SerializeSymmetricKeyEncrypted(ciphertext, passphrase, config)
-	if err != nil {
-		return
-	}
-	w, err := packet.SerializeSymmetricallyEncrypted(ciphertext, config.Cipher(), key, config)
-	if err != nil {
-		return
-	}
-
-	literaldata := w
-	if algo := config.Compression(); algo != packet.CompressionNone {
-		var compConfig *packet.CompressionConfig
-		if config != nil {
-			compConfig = config.CompressionConfig
-		}
-		literaldata, err = packet.SerializeCompressed(w, algo, compConfig)
-		if err != nil {
-			return
-		}
-	}
-
-	var epochSeconds uint32
-	if !hints.ModTime.IsZero() {
-		epochSeconds = uint32(hints.ModTime.Unix())
-	}
-	return packet.SerializeLiteral(literaldata, hints.IsBinary, hints.FileName, epochSeconds)
-}
-
-// intersectPreferences mutates and returns a prefix of a that contains only
-// the values in the intersection of a and b. The order of a is preserved.
-func intersectPreferences(a []uint8, b []uint8) (intersection []uint8) {
-	var j int
-	for _, v := range a {
-		for _, v2 := range b {
-			if v == v2 {
-				a[j] = v
-				j++
-				break
-			}
-		}
-	}
-
-	return a[:j]
-}
-
-func hashToHashId(h crypto.Hash) uint8 {
-	v, ok := s2k.HashToHashId(h)
-	if !ok {
-		panic("tried to convert unknown hash")
-	}
-	return v
-}
-
-// Encrypt encrypts a message to a number of recipients and, optionally, signs
-// it. hints contains optional information, that is also encrypted, that aids
-// the recipients in processing the message. The resulting WriteCloser must
-// be closed after the contents of the file have been written.
-// If config is nil, sensible defaults will be used.
-func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
-	var signer *packet.PrivateKey
-	if signed != nil {
-		signKey, ok := signed.signingKey(config.Now())
-		if !ok {
-			return nil, errors.InvalidArgumentError("no valid signing keys")
-		}
-		signer = signKey.PrivateKey
-		if signer == nil {
-			return nil, errors.InvalidArgumentError("no private key in signing key")
-		}
-		if signer.Encrypted {
-			return nil, errors.InvalidArgumentError("signing key must be decrypted")
-		}
-	}
-
-	// These are the possible ciphers that we'll use for the message.
-	candidateCiphers := []uint8{
-		uint8(packet.CipherAES128),
-		uint8(packet.CipherAES256),
-		uint8(packet.CipherCAST5),
-	}
-	// These are the possible hash functions that we'll use for the signature.
-	candidateHashes := []uint8{
-		hashToHashId(crypto.SHA256),
-		hashToHashId(crypto.SHA512),
-		hashToHashId(crypto.SHA1),
-		hashToHashId(crypto.RIPEMD160),
-	}
-	// In the event that a recipient doesn't specify any supported ciphers
-	// or hash functions, these are the ones that we assume that every
-	// implementation supports.
-	defaultCiphers := candidateCiphers[len(candidateCiphers)-1:]
-	defaultHashes := candidateHashes[len(candidateHashes)-1:]
-
-	encryptKeys := make([]Key, len(to))
-	for i := range to {
-		var ok bool
-		encryptKeys[i], ok = to[i].encryptionKey(config.Now())
-		if !ok {
-			return nil, errors.InvalidArgumentError("cannot encrypt a message to key id " + strconv.FormatUint(to[i].PrimaryKey.KeyId, 16) + " because it has no encryption keys")
-		}
-
-		sig := to[i].primaryIdentity().SelfSignature
-
-		preferredSymmetric := sig.PreferredSymmetric
-		if len(preferredSymmetric) == 0 {
-			preferredSymmetric = defaultCiphers
-		}
-		preferredHashes := sig.PreferredHash
-		if len(preferredHashes) == 0 {
-			preferredHashes = defaultHashes
-		}
-		candidateCiphers = intersectPreferences(candidateCiphers, preferredSymmetric)
-		candidateHashes = intersectPreferences(candidateHashes, preferredHashes)
-	}
-
-	if len(candidateCiphers) == 0 || len(candidateHashes) == 0 {
-		return nil, errors.InvalidArgumentError("cannot encrypt because recipient set shares no common algorithms")
-	}
-
-	cipher := packet.CipherFunction(candidateCiphers[0])
-	// If the cipher specified by config is a candidate, we'll use that.
-	configuredCipher := config.Cipher()
-	for _, c := range candidateCiphers {
-		cipherFunc := packet.CipherFunction(c)
-		if cipherFunc == configuredCipher {
-			cipher = cipherFunc
-			break
-		}
-	}
-
-	var hash crypto.Hash
-	for _, hashId := range candidateHashes {
-		if h, ok := s2k.HashIdToHash(hashId); ok && h.Available() {
-			hash = h
-			break
-		}
-	}
-
-	// If the hash specified by config is a candidate, we'll use that.
-	if configuredHash := config.Hash(); configuredHash.Available() {
-		for _, hashId := range candidateHashes {
-			if h, ok := s2k.HashIdToHash(hashId); ok && h == configuredHash {
-				hash = h
-				break
-			}
-		}
-	}
-
-	if hash == 0 {
-		hashId := candidateHashes[0]
-		name, ok := s2k.HashIdToString(hashId)
-		if !ok {
-			name = "#" + strconv.Itoa(int(hashId))
-		}
-		return nil, errors.InvalidArgumentError("cannot encrypt because no candidate hash functions are compiled in. (Wanted " + name + " in this case.)")
-	}
-
-	symKey := make([]byte, cipher.KeySize())
-	if _, err := io.ReadFull(config.Random(), symKey); err != nil {
-		return nil, err
-	}
-
-	for _, key := range encryptKeys {
-		if err := packet.SerializeEncryptedKey(ciphertext, key.PublicKey, cipher, symKey, config); err != nil {
-			return nil, err
-		}
-	}
-
-	encryptedData, err := packet.SerializeSymmetricallyEncrypted(ciphertext, cipher, symKey, config)
-	if err != nil {
-		return
-	}
-
-	if signer != nil {
-		ops := &packet.OnePassSignature{
-			SigType:    packet.SigTypeBinary,
-			Hash:       hash,
-			PubKeyAlgo: signer.PubKeyAlgo,
-			KeyId:      signer.KeyId,
-			IsLast:     true,
-		}
-		if err := ops.Serialize(encryptedData); err != nil {
-			return nil, err
-		}
-	}
-
-	if hints == nil {
-		hints = &FileHints{}
-	}
-
-	w := encryptedData
-	if signer != nil {
-		// If we need to write a signature packet after the literal
-		// data then we need to stop literalData from closing
-		// encryptedData.
-		w = noOpCloser{encryptedData}
-
-	}
-	var epochSeconds uint32
-	if !hints.ModTime.IsZero() {
-		epochSeconds = uint32(hints.ModTime.Unix())
-	}
-	literalData, err := packet.SerializeLiteral(w, hints.IsBinary, hints.FileName, epochSeconds)
-	if err != nil {
-		return nil, err
-	}
-
-	if signer != nil {
-		return signatureWriter{encryptedData, literalData, hash, hash.New(), signer, config}, nil
-	}
-	return literalData, nil
-}
-
-// signatureWriter hashes the contents of a message while passing it along to
-// literalData. When closed, it closes literalData, writes a signature packet
-// to encryptedData and then also closes encryptedData.
-type signatureWriter struct {
-	encryptedData io.WriteCloser
-	literalData   io.WriteCloser
-	hashType      crypto.Hash
-	h             hash.Hash
-	signer        *packet.PrivateKey
-	config        *packet.Config
-}
-
-func (s signatureWriter) Write(data []byte) (int, error) {
-	s.h.Write(data)
-	return s.literalData.Write(data)
-}
-
-func (s signatureWriter) Close() error {
-	sig := &packet.Signature{
-		SigType:      packet.SigTypeBinary,
-		PubKeyAlgo:   s.signer.PubKeyAlgo,
-		Hash:         s.hashType,
-		CreationTime: s.config.Now(),
-		IssuerKeyId:  &s.signer.KeyId,
-	}
-
-	if err := sig.Sign(s.h, s.signer, s.config); err != nil {
-		return err
-	}
-	if err := s.literalData.Close(); err != nil {
-		return err
-	}
-	if err := sig.Serialize(s.encryptedData); err != nil {
-		return err
-	}
-	return s.encryptedData.Close()
-}
-
-// noOpCloser is like an ioutil.NopCloser, but for an io.Writer.
-// TODO: we have two of these in OpenPGP packages alone. This probably needs
-// to be promoted somewhere more common.
-type noOpCloser struct {
-	w io.Writer
-}
-
-func (c noOpCloser) Write(data []byte) (n int, err error) {
-	return c.w.Write(data)
-}
-
-func (c noOpCloser) Close() error {
-	return nil
-}