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author | Wim <wim@42.be> | 2021-12-12 00:05:15 +0100 |
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committer | GitHub <noreply@github.com> | 2021-12-12 00:05:15 +0100 |
commit | 3893a035be347a7687a41d2054dd1b274d3a0504 (patch) | |
tree | dfe4a3bf72a0a6356e51bd8fc2e88e9a26e52331 /vendor/golang.org/x/crypto/poly1305/poly1305.go | |
parent | 658bdd9faa835660ae407331732e9d93d8f6443b (diff) | |
download | matterbridge-msglm-3893a035be347a7687a41d2054dd1b274d3a0504.tar.gz matterbridge-msglm-3893a035be347a7687a41d2054dd1b274d3a0504.tar.bz2 matterbridge-msglm-3893a035be347a7687a41d2054dd1b274d3a0504.zip |
Update dependencies/vendor (#1659)
Diffstat (limited to 'vendor/golang.org/x/crypto/poly1305/poly1305.go')
-rw-r--r-- | vendor/golang.org/x/crypto/poly1305/poly1305.go | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/vendor/golang.org/x/crypto/poly1305/poly1305.go b/vendor/golang.org/x/crypto/poly1305/poly1305.go deleted file mode 100644 index 9d7a6af0..00000000 --- a/vendor/golang.org/x/crypto/poly1305/poly1305.go +++ /dev/null @@ -1,99 +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 poly1305 implements Poly1305 one-time message authentication code as -// specified in https://cr.yp.to/mac/poly1305-20050329.pdf. -// -// Poly1305 is a fast, one-time authentication function. It is infeasible for an -// attacker to generate an authenticator for a message without the key. However, a -// key must only be used for a single message. Authenticating two different -// messages with the same key allows an attacker to forge authenticators for other -// messages with the same key. -// -// Poly1305 was originally coupled with AES in order to make Poly1305-AES. AES was -// used with a fixed key in order to generate one-time keys from an nonce. -// However, in this package AES isn't used and the one-time key is specified -// directly. -package poly1305 // import "golang.org/x/crypto/poly1305" - -import "crypto/subtle" - -// TagSize is the size, in bytes, of a poly1305 authenticator. -const TagSize = 16 - -// Sum generates an authenticator for msg using a one-time key and puts the -// 16-byte result into out. Authenticating two different messages with the same -// key allows an attacker to forge messages at will. -func Sum(out *[16]byte, m []byte, key *[32]byte) { - h := New(key) - h.Write(m) - h.Sum(out[:0]) -} - -// Verify returns true if mac is a valid authenticator for m with the given key. -func Verify(mac *[16]byte, m []byte, key *[32]byte) bool { - var tmp [16]byte - Sum(&tmp, m, key) - return subtle.ConstantTimeCompare(tmp[:], mac[:]) == 1 -} - -// New returns a new MAC computing an authentication -// tag of all data written to it with the given key. -// This allows writing the message progressively instead -// of passing it as a single slice. Common users should use -// the Sum function instead. -// -// The key must be unique for each message, as authenticating -// two different messages with the same key allows an attacker -// to forge messages at will. -func New(key *[32]byte) *MAC { - m := &MAC{} - initialize(key, &m.macState) - return m -} - -// MAC is an io.Writer computing an authentication tag -// of the data written to it. -// -// MAC cannot be used like common hash.Hash implementations, -// because using a poly1305 key twice breaks its security. -// Therefore writing data to a running MAC after calling -// Sum or Verify causes it to panic. -type MAC struct { - mac // platform-dependent implementation - - finalized bool -} - -// Size returns the number of bytes Sum will return. -func (h *MAC) Size() int { return TagSize } - -// Write adds more data to the running message authentication code. -// It never returns an error. -// -// It must not be called after the first call of Sum or Verify. -func (h *MAC) Write(p []byte) (n int, err error) { - if h.finalized { - panic("poly1305: write to MAC after Sum or Verify") - } - return h.mac.Write(p) -} - -// Sum computes the authenticator of all data written to the -// message authentication code. -func (h *MAC) Sum(b []byte) []byte { - var mac [TagSize]byte - h.mac.Sum(&mac) - h.finalized = true - return append(b, mac[:]...) -} - -// Verify returns whether the authenticator of all data written to -// the message authentication code matches the expected value. -func (h *MAC) Verify(expected []byte) bool { - var mac [TagSize]byte - h.mac.Sum(&mac) - h.finalized = true - return subtle.ConstantTimeCompare(expected, mac[:]) == 1 -} |