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# Description ## Checklist Please put an x inside each checkbox to indicate that you've read and followed it: `[ ]` -> `[x]` If this is a documentation change, only the first checkbox must be filled (you can delete the others if you want). - [x] I/we have read the [GoToSocial contribution guidelines](https://codeberg.org/superseriousbusiness/gotosocial/src/branch/main/CONTRIBUTING.md). - [ ] I/we have discussed the proposed changes already, either in an issue on the repository, or in the Matrix chat. - [x] I/we have not leveraged AI to create the proposed changes. - [ ] I/we have performed a self-review of added code. - [ ] I/we have written code that is legible and maintainable by others. - [ ] I/we have commented the added code, particularly in hard-to-understand areas. - [ ] I/we have made any necessary changes to documentation. - [ ] I/we have added tests that cover new code. - [ ] I/we have run tests and they pass locally with the changes. - [ ] I/we have run `go fmt ./...` and `golangci-lint run`. Reviewed-on: https://codeberg.org/superseriousbusiness/gotosocial/pulls/4255 Co-authored-by: Daenney <daenney@noreply.codeberg.org> Co-committed-by: Daenney <daenney@noreply.codeberg.org>
68 lines
1.5 KiB
Go
68 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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HMACSHA512ETM: {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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HMACSHA256ETM: {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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HMACSHA512: {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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HMACSHA256: {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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HMACSHA1: {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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InsecureHMACSHA196: {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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