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2f98197857
This fork golang.org/x/crypto/ssh (at upstream x/crypto git rev e47973b1c1) into tailscale.com/tempfork/sshtest/ssh so we can hack up the client in weird ways to simulate other SSH clients seen in the wild. Two changes were made to the files when they were copied from x/crypto: * internal/poly1305 imports were replaced by the non-internal version; no code changes otherwise. It didn't need the internal one. * all decode-with-passphrase funcs were deleted, to avoid using the internal package x/crypto/ssh/internal/bcrypt_pbkdf Then the tests passed. Updates #14969 Change-Id: Ibf1abebfe608c75fef4da0255314f65e54ce5077 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
69 lines
1.5 KiB
Go
69 lines
1.5 KiB
Go
// Copyright 2012 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package ssh
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// Message authentication support
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import (
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"crypto/hmac"
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"crypto/sha1"
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"crypto/sha256"
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"crypto/sha512"
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"hash"
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)
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type macMode struct {
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keySize int
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etm bool
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new func(key []byte) hash.Hash
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}
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// truncatingMAC wraps around a hash.Hash and truncates the output digest to
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// a given size.
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type truncatingMAC struct {
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length int
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hmac hash.Hash
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}
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func (t truncatingMAC) Write(data []byte) (int, error) {
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return t.hmac.Write(data)
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}
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func (t truncatingMAC) Sum(in []byte) []byte {
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out := t.hmac.Sum(in)
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return out[:len(in)+t.length]
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}
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func (t truncatingMAC) Reset() {
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t.hmac.Reset()
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}
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func (t truncatingMAC) Size() int {
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return t.length
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}
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func (t truncatingMAC) BlockSize() int { return t.hmac.BlockSize() }
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var macModes = map[string]*macMode{
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"hmac-sha2-512-etm@openssh.com": {64, true, func(key []byte) hash.Hash {
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return hmac.New(sha512.New, key)
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}},
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"hmac-sha2-256-etm@openssh.com": {32, true, func(key []byte) hash.Hash {
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return hmac.New(sha256.New, key)
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}},
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"hmac-sha2-512": {64, false, func(key []byte) hash.Hash {
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return hmac.New(sha512.New, key)
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}},
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"hmac-sha2-256": {32, false, func(key []byte) hash.Hash {
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return hmac.New(sha256.New, key)
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}},
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"hmac-sha1": {20, false, func(key []byte) hash.Hash {
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return hmac.New(sha1.New, key)
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}},
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"hmac-sha1-96": {20, false, func(key []byte) hash.Hash {
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return truncatingMAC{12, hmac.New(sha1.New, key)}
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}},
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}
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