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author | Péter Szilágyi <peterke@gmail.com> | 2017-04-11 07:25:53 +0800 |
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committer | Felix Lange <fjl@users.noreply.github.com> | 2017-04-11 07:25:53 +0800 |
commit | 706a1e552c96bf75c60844c1dc28fc83778795fc (patch) | |
tree | babbc6193bbdbde23f063a26544c630434047793 /vendor/golang.org/x/crypto/ssh/mac.go | |
parent | 18bbe124259a852b349e8238ffe394639e29d803 (diff) | |
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cmd/puppeth: your Ethereum private network manager (#13854)
Diffstat (limited to 'vendor/golang.org/x/crypto/ssh/mac.go')
-rw-r--r-- | vendor/golang.org/x/crypto/ssh/mac.go | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/vendor/golang.org/x/crypto/ssh/mac.go b/vendor/golang.org/x/crypto/ssh/mac.go new file mode 100644 index 000000000..c07a06285 --- /dev/null +++ b/vendor/golang.org/x/crypto/ssh/mac.go @@ -0,0 +1,61 @@ +// 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 ssh + +// Message authentication support + +import ( + "crypto/hmac" + "crypto/sha1" + "crypto/sha256" + "hash" +) + +type macMode struct { + keySize int + etm bool + new func(key []byte) hash.Hash +} + +// truncatingMAC wraps around a hash.Hash and truncates the output digest to +// a given size. +type truncatingMAC struct { + length int + hmac hash.Hash +} + +func (t truncatingMAC) Write(data []byte) (int, error) { + return t.hmac.Write(data) +} + +func (t truncatingMAC) Sum(in []byte) []byte { + out := t.hmac.Sum(in) + return out[:len(in)+t.length] +} + +func (t truncatingMAC) Reset() { + t.hmac.Reset() +} + +func (t truncatingMAC) Size() int { + return t.length +} + +func (t truncatingMAC) BlockSize() int { return t.hmac.BlockSize() } + +var macModes = map[string]*macMode{ + "hmac-sha2-256-etm@openssh.com": {32, true, func(key []byte) hash.Hash { + return hmac.New(sha256.New, key) + }}, + "hmac-sha2-256": {32, false, func(key []byte) hash.Hash { + return hmac.New(sha256.New, key) + }}, + "hmac-sha1": {20, false, func(key []byte) hash.Hash { + return hmac.New(sha1.New, key) + }}, + "hmac-sha1-96": {20, false, func(key []byte) hash.Hash { + return truncatingMAC{12, hmac.New(sha1.New, key)} + }}, +} |