435c0d9fc8
This PR switches the Nomad repository from using govendor to Go modules for managing dependencies. Aspects of the Nomad workflow remain pretty much the same. The usual Makefile targets should continue to work as they always did. The API submodule simply defers to the parent Nomad version on the repository, keeping the semantics of API versioning that currently exists.
62 lines
1.3 KiB
Go
62 lines
1.3 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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"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-sha2-256-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-sha2-256": {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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