Use mod vendor for vendored directory (backwards compatible)

1 files changed, 0 insertions, 952 deletions

diff --git a/vendor/github.com/pkg/sftp/packet.go b/vendor/github.com/pkg/sftp/packet.go
deleted file mode 100644
index 711ca50c..00000000
--- a/vendor/github.com/pkg/sftp/packet.go
+++ /dev/null
@@ -1,952 +0,0 @@
-package sftp
-
-import (
-	"bytes"
-	"encoding"
-	"encoding/binary"
-	"fmt"
-	"io"
-	"os"
-	"reflect"
-
-	"github.com/pkg/errors"
-)
-
-var (
-	errShortPacket           = errors.New("packet too short")
-	errUnknownExtendedPacket = errors.New("unknown extended packet")
-)
-
-const (
-	debugDumpTxPacket      = false
-	debugDumpRxPacket      = false
-	debugDumpTxPacketBytes = false
-	debugDumpRxPacketBytes = false
-)
-
-func marshalUint32(b []byte, v uint32) []byte {
-	return append(b, byte(v>>24), byte(v>>16), byte(v>>8), byte(v))
-}
-
-func marshalUint64(b []byte, v uint64) []byte {
-	return marshalUint32(marshalUint32(b, uint32(v>>32)), uint32(v))
-}
-
-func marshalString(b []byte, v string) []byte {
-	return append(marshalUint32(b, uint32(len(v))), v...)
-}
-
-func marshal(b []byte, v interface{}) []byte {
-	if v == nil {
-		return b
-	}
-	switch v := v.(type) {
-	case uint8:
-		return append(b, v)
-	case uint32:
-		return marshalUint32(b, v)
-	case uint64:
-		return marshalUint64(b, v)
-	case string:
-		return marshalString(b, v)
-	case os.FileInfo:
-		return marshalFileInfo(b, v)
-	default:
-		switch d := reflect.ValueOf(v); d.Kind() {
-		case reflect.Struct:
-			for i, n := 0, d.NumField(); i < n; i++ {
-				b = append(marshal(b, d.Field(i).Interface()))
-			}
-			return b
-		case reflect.Slice:
-			for i, n := 0, d.Len(); i < n; i++ {
-				b = append(marshal(b, d.Index(i).Interface()))
-			}
-			return b
-		default:
-			panic(fmt.Sprintf("marshal(%#v): cannot handle type %T", v, v))
-		}
-	}
-}
-
-func unmarshalUint32(b []byte) (uint32, []byte) {
-	v := uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24
-	return v, b[4:]
-}
-
-func unmarshalUint32Safe(b []byte) (uint32, []byte, error) {
-	var v uint32
-	if len(b) < 4 {
-		return 0, nil, errShortPacket
-	}
-	v, b = unmarshalUint32(b)
-	return v, b, nil
-}
-
-func unmarshalUint64(b []byte) (uint64, []byte) {
-	h, b := unmarshalUint32(b)
-	l, b := unmarshalUint32(b)
-	return uint64(h)<<32 | uint64(l), b
-}
-
-func unmarshalUint64Safe(b []byte) (uint64, []byte, error) {
-	var v uint64
-	if len(b) < 8 {
-		return 0, nil, errShortPacket
-	}
-	v, b = unmarshalUint64(b)
-	return v, b, nil
-}
-
-func unmarshalString(b []byte) (string, []byte) {
-	n, b := unmarshalUint32(b)
-	return string(b[:n]), b[n:]
-}
-
-func unmarshalStringSafe(b []byte) (string, []byte, error) {
-	n, b, err := unmarshalUint32Safe(b)
-	if err != nil {
-		return "", nil, err
-	}
-	if int64(n) > int64(len(b)) {
-		return "", nil, errShortPacket
-	}
-	return string(b[:n]), b[n:], nil
-}
-
-// sendPacket marshals p according to RFC 4234.
-func sendPacket(w io.Writer, m encoding.BinaryMarshaler) error {
-	bb, err := m.MarshalBinary()
-	if err != nil {
-		return errors.Errorf("binary marshaller failed: %v", err)
-	}
-	if debugDumpTxPacketBytes {
-		debug("send packet: %s %d bytes %x", fxp(bb[0]), len(bb), bb[1:])
-	} else if debugDumpTxPacket {
-		debug("send packet: %s %d bytes", fxp(bb[0]), len(bb))
-	}
-	l := uint32(len(bb))
-	hdr := []byte{byte(l >> 24), byte(l >> 16), byte(l >> 8), byte(l)}
-	_, err = w.Write(hdr)
-	if err != nil {
-		return errors.Errorf("failed to send packet header: %v", err)
-	}
-	_, err = w.Write(bb)
-	if err != nil {
-		return errors.Errorf("failed to send packet body: %v", err)
-	}
-	return nil
-}
-
-func recvPacket(r io.Reader) (uint8, []byte, error) {
-	var b = []byte{0, 0, 0, 0}
-	if _, err := io.ReadFull(r, b); err != nil {
-		return 0, nil, err
-	}
-	l, _ := unmarshalUint32(b)
-	b = make([]byte, l)
-	if _, err := io.ReadFull(r, b); err != nil {
-		debug("recv packet %d bytes: err %v", l, err)
-		return 0, nil, err
-	}
-	if debugDumpRxPacketBytes {
-		debug("recv packet: %s %d bytes %x", fxp(b[0]), l, b[1:])
-	} else if debugDumpRxPacket {
-		debug("recv packet: %s %d bytes", fxp(b[0]), l)
-	}
-	return b[0], b[1:], nil
-}
-
-type extensionPair struct {
-	Name string
-	Data string
-}
-
-func unmarshalExtensionPair(b []byte) (extensionPair, []byte, error) {
-	var ep extensionPair
-	var err error
-	ep.Name, b, err = unmarshalStringSafe(b)
-	if err != nil {
-		return ep, b, err
-	}
-	ep.Data, b, err = unmarshalStringSafe(b)
-	return ep, b, err
-}
-
-// Here starts the definition of packets along with their MarshalBinary
-// implementations.
-// Manually writing the marshalling logic wins us a lot of time and
-// allocation.
-
-type sshFxInitPacket struct {
-	Version    uint32
-	Extensions []extensionPair
-}
-
-func (p sshFxInitPacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 // byte + uint32
-	for _, e := range p.Extensions {
-		l += 4 + len(e.Name) + 4 + len(e.Data)
-	}
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_INIT)
-	b = marshalUint32(b, p.Version)
-	for _, e := range p.Extensions {
-		b = marshalString(b, e.Name)
-		b = marshalString(b, e.Data)
-	}
-	return b, nil
-}
-
-func (p *sshFxInitPacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.Version, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	}
-	for len(b) > 0 {
-		var ep extensionPair
-		ep, b, err = unmarshalExtensionPair(b)
-		if err != nil {
-			return err
-		}
-		p.Extensions = append(p.Extensions, ep)
-	}
-	return nil
-}
-
-type sshFxVersionPacket struct {
-	Version    uint32
-	Extensions []struct {
-		Name, Data string
-	}
-}
-
-func (p sshFxVersionPacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 // byte + uint32
-	for _, e := range p.Extensions {
-		l += 4 + len(e.Name) + 4 + len(e.Data)
-	}
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_VERSION)
-	b = marshalUint32(b, p.Version)
-	for _, e := range p.Extensions {
-		b = marshalString(b, e.Name)
-		b = marshalString(b, e.Data)
-	}
-	return b, nil
-}
-
-func marshalIDString(packetType byte, id uint32, str string) ([]byte, error) {
-	l := 1 + 4 + // type(byte) + uint32
-		4 + len(str)
-
-	b := make([]byte, 0, l)
-	b = append(b, packetType)
-	b = marshalUint32(b, id)
-	b = marshalString(b, str)
-	return b, nil
-}
-
-func unmarshalIDString(b []byte, id *uint32, str *string) error {
-	var err error
-	*id, b, err = unmarshalUint32Safe(b)
-	if err != nil {
-		return err
-	}
-	*str, _, err = unmarshalStringSafe(b)
-	return err
-}
-
-type sshFxpReaddirPacket struct {
-	ID     uint32
-	Handle string
-}
-
-func (p sshFxpReaddirPacket) id() uint32 { return p.ID }
-
-func (p sshFxpReaddirPacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_READDIR, p.ID, p.Handle)
-}
-
-func (p *sshFxpReaddirPacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Handle)
-}
-
-type sshFxpOpendirPacket struct {
-	ID   uint32
-	Path string
-}
-
-func (p sshFxpOpendirPacket) id() uint32 { return p.ID }
-
-func (p sshFxpOpendirPacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_OPENDIR, p.ID, p.Path)
-}
-
-func (p *sshFxpOpendirPacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Path)
-}
-
-type sshFxpLstatPacket struct {
-	ID   uint32
-	Path string
-}
-
-func (p sshFxpLstatPacket) id() uint32 { return p.ID }
-
-func (p sshFxpLstatPacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_LSTAT, p.ID, p.Path)
-}
-
-func (p *sshFxpLstatPacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Path)
-}
-
-type sshFxpStatPacket struct {
-	ID   uint32
-	Path string
-}
-
-func (p sshFxpStatPacket) id() uint32 { return p.ID }
-
-func (p sshFxpStatPacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_STAT, p.ID, p.Path)
-}
-
-func (p *sshFxpStatPacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Path)
-}
-
-type sshFxpFstatPacket struct {
-	ID     uint32
-	Handle string
-}
-
-func (p sshFxpFstatPacket) id() uint32 { return p.ID }
-
-func (p sshFxpFstatPacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_FSTAT, p.ID, p.Handle)
-}
-
-func (p *sshFxpFstatPacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Handle)
-}
-
-type sshFxpClosePacket struct {
-	ID     uint32
-	Handle string
-}
-
-func (p sshFxpClosePacket) id() uint32 { return p.ID }
-
-func (p sshFxpClosePacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_CLOSE, p.ID, p.Handle)
-}
-
-func (p *sshFxpClosePacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Handle)
-}
-
-type sshFxpRemovePacket struct {
-	ID       uint32
-	Filename string
-}
-
-func (p sshFxpRemovePacket) id() uint32 { return p.ID }
-
-func (p sshFxpRemovePacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_REMOVE, p.ID, p.Filename)
-}
-
-func (p *sshFxpRemovePacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Filename)
-}
-
-type sshFxpRmdirPacket struct {
-	ID   uint32
-	Path string
-}
-
-func (p sshFxpRmdirPacket) id() uint32 { return p.ID }
-
-func (p sshFxpRmdirPacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_RMDIR, p.ID, p.Path)
-}
-
-func (p *sshFxpRmdirPacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Path)
-}
-
-type sshFxpSymlinkPacket struct {
-	ID         uint32
-	Targetpath string
-	Linkpath   string
-}
-
-func (p sshFxpSymlinkPacket) id() uint32 { return p.ID }
-
-func (p sshFxpSymlinkPacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 + // type(byte) + uint32
-		4 + len(p.Targetpath) +
-		4 + len(p.Linkpath)
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_SYMLINK)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, p.Targetpath)
-	b = marshalString(b, p.Linkpath)
-	return b, nil
-}
-
-func (p *sshFxpSymlinkPacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Targetpath, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Linkpath, _, err = unmarshalStringSafe(b); err != nil {
-		return err
-	}
-	return nil
-}
-
-type sshFxpReadlinkPacket struct {
-	ID   uint32
-	Path string
-}
-
-func (p sshFxpReadlinkPacket) id() uint32 { return p.ID }
-
-func (p sshFxpReadlinkPacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_READLINK, p.ID, p.Path)
-}
-
-func (p *sshFxpReadlinkPacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Path)
-}
-
-type sshFxpRealpathPacket struct {
-	ID   uint32
-	Path string
-}
-
-func (p sshFxpRealpathPacket) id() uint32 { return p.ID }
-
-func (p sshFxpRealpathPacket) MarshalBinary() ([]byte, error) {
-	return marshalIDString(ssh_FXP_REALPATH, p.ID, p.Path)
-}
-
-func (p *sshFxpRealpathPacket) UnmarshalBinary(b []byte) error {
-	return unmarshalIDString(b, &p.ID, &p.Path)
-}
-
-type sshFxpNameAttr struct {
-	Name     string
-	LongName string
-	Attrs    []interface{}
-}
-
-func (p sshFxpNameAttr) MarshalBinary() ([]byte, error) {
-	b := []byte{}
-	b = marshalString(b, p.Name)
-	b = marshalString(b, p.LongName)
-	for _, attr := range p.Attrs {
-		b = marshal(b, attr)
-	}
-	return b, nil
-}
-
-type sshFxpNamePacket struct {
-	ID        uint32
-	NameAttrs []sshFxpNameAttr
-}
-
-func (p sshFxpNamePacket) MarshalBinary() ([]byte, error) {
-	b := []byte{}
-	b = append(b, ssh_FXP_NAME)
-	b = marshalUint32(b, p.ID)
-	b = marshalUint32(b, uint32(len(p.NameAttrs)))
-	for _, na := range p.NameAttrs {
-		ab, err := na.MarshalBinary()
-		if err != nil {
-			return nil, err
-		}
-
-		b = append(b, ab...)
-	}
-	return b, nil
-}
-
-type sshFxpOpenPacket struct {
-	ID     uint32
-	Path   string
-	Pflags uint32
-	Flags  uint32 // ignored
-}
-
-func (p sshFxpOpenPacket) id() uint32 { return p.ID }
-
-func (p sshFxpOpenPacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 +
-		4 + len(p.Path) +
-		4 + 4
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_OPEN)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, p.Path)
-	b = marshalUint32(b, p.Pflags)
-	b = marshalUint32(b, p.Flags)
-	return b, nil
-}
-
-func (p *sshFxpOpenPacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Path, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Pflags, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Flags, _, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	}
-	return nil
-}
-
-type sshFxpReadPacket struct {
-	ID     uint32
-	Handle string
-	Offset uint64
-	Len    uint32
-}
-
-func (p sshFxpReadPacket) id() uint32 { return p.ID }
-
-func (p sshFxpReadPacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 + // type(byte) + uint32
-		4 + len(p.Handle) +
-		8 + 4 // uint64 + uint32
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_READ)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, p.Handle)
-	b = marshalUint64(b, p.Offset)
-	b = marshalUint32(b, p.Len)
-	return b, nil
-}
-
-func (p *sshFxpReadPacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Handle, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Offset, b, err = unmarshalUint64Safe(b); err != nil {
-		return err
-	} else if p.Len, _, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	}
-	return nil
-}
-
-type sshFxpRenamePacket struct {
-	ID      uint32
-	Oldpath string
-	Newpath string
-}
-
-func (p sshFxpRenamePacket) id() uint32 { return p.ID }
-
-func (p sshFxpRenamePacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 + // type(byte) + uint32
-		4 + len(p.Oldpath) +
-		4 + len(p.Newpath)
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_RENAME)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, p.Oldpath)
-	b = marshalString(b, p.Newpath)
-	return b, nil
-}
-
-func (p *sshFxpRenamePacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Oldpath, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Newpath, _, err = unmarshalStringSafe(b); err != nil {
-		return err
-	}
-	return nil
-}
-
-type sshFxpPosixRenamePacket struct {
-	ID      uint32
-	Oldpath string
-	Newpath string
-}
-
-func (p sshFxpPosixRenamePacket) id() uint32 { return p.ID }
-
-func (p sshFxpPosixRenamePacket) MarshalBinary() ([]byte, error) {
-	const ext = "posix-rename@openssh.com"
-	l := 1 + 4 + // type(byte) + uint32
-		4 + len(ext) +
-		4 + len(p.Oldpath) +
-		4 + len(p.Newpath)
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_EXTENDED)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, ext)
-	b = marshalString(b, p.Oldpath)
-	b = marshalString(b, p.Newpath)
-	return b, nil
-}
-
-type sshFxpWritePacket struct {
-	ID     uint32
-	Handle string
-	Offset uint64
-	Length uint32
-	Data   []byte
-}
-
-func (p sshFxpWritePacket) id() uint32 { return p.ID }
-
-func (p sshFxpWritePacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 + // type(byte) + uint32
-		4 + len(p.Handle) +
-		8 + 4 + // uint64 + uint32
-		len(p.Data)
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_WRITE)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, p.Handle)
-	b = marshalUint64(b, p.Offset)
-	b = marshalUint32(b, p.Length)
-	b = append(b, p.Data...)
-	return b, nil
-}
-
-func (p *sshFxpWritePacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Handle, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Offset, b, err = unmarshalUint64Safe(b); err != nil {
-		return err
-	} else if p.Length, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if uint32(len(b)) < p.Length {
-		return errShortPacket
-	}
-
-	p.Data = append([]byte{}, b[:p.Length]...)
-	return nil
-}
-
-type sshFxpMkdirPacket struct {
-	ID    uint32
-	Path  string
-	Flags uint32 // ignored
-}
-
-func (p sshFxpMkdirPacket) id() uint32 { return p.ID }
-
-func (p sshFxpMkdirPacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 + // type(byte) + uint32
-		4 + len(p.Path) +
-		4 // uint32
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_MKDIR)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, p.Path)
-	b = marshalUint32(b, p.Flags)
-	return b, nil
-}
-
-func (p *sshFxpMkdirPacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Path, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Flags, _, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	}
-	return nil
-}
-
-type sshFxpSetstatPacket struct {
-	ID    uint32
-	Path  string
-	Flags uint32
-	Attrs interface{}
-}
-
-type sshFxpFsetstatPacket struct {
-	ID     uint32
-	Handle string
-	Flags  uint32
-	Attrs  interface{}
-}
-
-func (p sshFxpSetstatPacket) id() uint32  { return p.ID }
-func (p sshFxpFsetstatPacket) id() uint32 { return p.ID }
-
-func (p sshFxpSetstatPacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 + // type(byte) + uint32
-		4 + len(p.Path) +
-		4 // uint32 + uint64
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_SETSTAT)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, p.Path)
-	b = marshalUint32(b, p.Flags)
-	b = marshal(b, p.Attrs)
-	return b, nil
-}
-
-func (p sshFxpFsetstatPacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 + // type(byte) + uint32
-		4 + len(p.Handle) +
-		4 // uint32 + uint64
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_FSETSTAT)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, p.Handle)
-	b = marshalUint32(b, p.Flags)
-	b = marshal(b, p.Attrs)
-	return b, nil
-}
-
-func (p *sshFxpSetstatPacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Path, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Flags, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	}
-	p.Attrs = b
-	return nil
-}
-
-func (p *sshFxpFsetstatPacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Handle, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Flags, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	}
-	p.Attrs = b
-	return nil
-}
-
-type sshFxpHandlePacket struct {
-	ID     uint32
-	Handle string
-}
-
-func (p sshFxpHandlePacket) MarshalBinary() ([]byte, error) {
-	b := []byte{ssh_FXP_HANDLE}
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, p.Handle)
-	return b, nil
-}
-
-type sshFxpStatusPacket struct {
-	ID uint32
-	StatusError
-}
-
-func (p sshFxpStatusPacket) MarshalBinary() ([]byte, error) {
-	b := []byte{ssh_FXP_STATUS}
-	b = marshalUint32(b, p.ID)
-	b = marshalStatus(b, p.StatusError)
-	return b, nil
-}
-
-type sshFxpDataPacket struct {
-	ID     uint32
-	Length uint32
-	Data   []byte
-}
-
-func (p sshFxpDataPacket) MarshalBinary() ([]byte, error) {
-	b := []byte{ssh_FXP_DATA}
-	b = marshalUint32(b, p.ID)
-	b = marshalUint32(b, p.Length)
-	b = append(b, p.Data[:p.Length]...)
-	return b, nil
-}
-
-func (p *sshFxpDataPacket) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.Length, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if uint32(len(b)) < p.Length {
-		return errors.New("truncated packet")
-	}
-
-	p.Data = make([]byte, p.Length)
-	copy(p.Data, b)
-	return nil
-}
-
-type sshFxpStatvfsPacket struct {
-	ID   uint32
-	Path string
-}
-
-func (p sshFxpStatvfsPacket) id() uint32 { return p.ID }
-
-func (p sshFxpStatvfsPacket) MarshalBinary() ([]byte, error) {
-	l := 1 + 4 + // type(byte) + uint32
-		len(p.Path) +
-		len("statvfs@openssh.com")
-
-	b := make([]byte, 0, l)
-	b = append(b, ssh_FXP_EXTENDED)
-	b = marshalUint32(b, p.ID)
-	b = marshalString(b, "statvfs@openssh.com")
-	b = marshalString(b, p.Path)
-	return b, nil
-}
-
-// A StatVFS contains statistics about a filesystem.
-type StatVFS struct {
-	ID      uint32
-	Bsize   uint64 /* file system block size */
-	Frsize  uint64 /* fundamental fs block size */
-	Blocks  uint64 /* number of blocks (unit f_frsize) */
-	Bfree   uint64 /* free blocks in file system */
-	Bavail  uint64 /* free blocks for non-root */
-	Files   uint64 /* total file inodes */
-	Ffree   uint64 /* free file inodes */
-	Favail  uint64 /* free file inodes for to non-root */
-	Fsid    uint64 /* file system id */
-	Flag    uint64 /* bit mask of f_flag values */
-	Namemax uint64 /* maximum filename length */
-}
-
-// TotalSpace calculates the amount of total space in a filesystem.
-func (p *StatVFS) TotalSpace() uint64 {
-	return p.Frsize * p.Blocks
-}
-
-// FreeSpace calculates the amount of free space in a filesystem.
-func (p *StatVFS) FreeSpace() uint64 {
-	return p.Frsize * p.Bfree
-}
-
-// Convert to ssh_FXP_EXTENDED_REPLY packet binary format
-func (p *StatVFS) MarshalBinary() ([]byte, error) {
-	var buf bytes.Buffer
-	buf.Write([]byte{ssh_FXP_EXTENDED_REPLY})
-	err := binary.Write(&buf, binary.BigEndian, p)
-	return buf.Bytes(), err
-}
-
-type sshFxpExtendedPacket struct {
-	ID              uint32
-	ExtendedRequest string
-	SpecificPacket  interface {
-		serverRespondablePacket
-		readonly() bool
-	}
-}
-
-func (p sshFxpExtendedPacket) id() uint32     { return p.ID }
-func (p sshFxpExtendedPacket) readonly() bool { return p.SpecificPacket.readonly() }
-
-func (p sshFxpExtendedPacket) respond(svr *Server) error {
-	return p.SpecificPacket.respond(svr)
-}
-
-func (p *sshFxpExtendedPacket) UnmarshalBinary(b []byte) error {
-	var err error
-	bOrig := b
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.ExtendedRequest, _, err = unmarshalStringSafe(b); err != nil {
-		return err
-	}
-
-	// specific unmarshalling
-	switch p.ExtendedRequest {
-	case "statvfs@openssh.com":
-		p.SpecificPacket = &sshFxpExtendedPacketStatVFS{}
-	case "posix-rename@openssh.com":
-		p.SpecificPacket = &sshFxpExtendedPacketPosixRename{}
-	default:
-		return errUnknownExtendedPacket
-	}
-
-	return p.SpecificPacket.UnmarshalBinary(bOrig)
-}
-
-type sshFxpExtendedPacketStatVFS struct {
-	ID              uint32
-	ExtendedRequest string
-	Path            string
-}
-
-func (p sshFxpExtendedPacketStatVFS) id() uint32     { return p.ID }
-func (p sshFxpExtendedPacketStatVFS) readonly() bool { return true }
-func (p *sshFxpExtendedPacketStatVFS) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.ExtendedRequest, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Path, _, err = unmarshalStringSafe(b); err != nil {
-		return err
-	}
-	return nil
-}
-
-type sshFxpExtendedPacketPosixRename struct {
-	ID              uint32
-	ExtendedRequest string
-	Oldpath         string
-	Newpath         string
-}
-
-func (p sshFxpExtendedPacketPosixRename) id() uint32     { return p.ID }
-func (p sshFxpExtendedPacketPosixRename) readonly() bool { return false }
-func (p *sshFxpExtendedPacketPosixRename) UnmarshalBinary(b []byte) error {
-	var err error
-	if p.ID, b, err = unmarshalUint32Safe(b); err != nil {
-		return err
-	} else if p.ExtendedRequest, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Oldpath, b, err = unmarshalStringSafe(b); err != nil {
-		return err
-	} else if p.Newpath, _, err = unmarshalStringSafe(b); err != nil {
-		return err
-	}
-	return nil
-}
-
-func (p sshFxpExtendedPacketPosixRename) respond(s *Server) error {
-	err := os.Rename(p.Oldpath, p.Newpath)
-	return s.sendError(p, err)
-}