David Leon Gil
1b32d8b50a
1. API: This exposes a minimal API: the SHA-3 functions implement hash.Hash. The SHAKE functions implement a new "ShakeHash" interface that implements io.Reader, io.Writer, and Reset(). (The previous Barrier() function has been removed.) (Alternative proposal: Don't implement io.Reader, but instead provide a "Digest(d []byte) error" function that performs a hash.Hash style copy. Somewhat more minimal, but very easy to use incorrectly.) 2. Tests Added the complete set of ShortMsgKATs from https://github.com/gvanas/KeccakCodePackage 3. Correctness In sync with draft FIPS-202. 4. Documentation A summary of the security properties of the SHA-3 and SHAKE functions is provided in doc.go; some concrete recommendations as well. Fixes 8563. R=golang-codereviews, agl CC=golang-codereviews https://golang.org/cl/130950043
74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
// Copyright 2014 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 sha3
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// This file provides functions for creating instances of the SHA-3
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// and SHAKE hash functions, as well as utility functions for hashing
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// bytes.
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import (
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"crypto"
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"hash"
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)
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func init() {
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crypto.RegisterHash(crypto.SHA3_224, New224)
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crypto.RegisterHash(crypto.SHA3_256, New256)
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crypto.RegisterHash(crypto.SHA3_384, New384)
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crypto.RegisterHash(crypto.SHA3_512, New512)
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}
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// New224 creates a new SHA3-224 hash.
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// Its generic security strength is 224 bits against preimage attacks,
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// and 112 bits against collision attacks.
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func New224() hash.Hash { return &state{rate: 144, outputLen: 28, dsbyte: 0x06} }
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// New256 creates a new SHA3-256 hash.
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// Its generic security strength is 256 bits against preimage attacks,
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// and 128 bits against collision attacks.
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func New256() hash.Hash { return &state{rate: 136, outputLen: 32, dsbyte: 0x06} }
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// New384 creates a new SHA3-384 hash.
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// Its generic security strength is 384 bits against preimage attacks,
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// and 192 bits against collision attacks.
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func New384() hash.Hash { return &state{rate: 104, outputLen: 48, dsbyte: 0x06} }
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// New512 creates a new SHA3-512 hash.
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// Its generic security strength is 512 bits against preimage attacks,
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// and 256 bits against collision attacks.
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func New512() hash.Hash { return &state{rate: 72, outputLen: 64, dsbyte: 0x06} }
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// Sum224 returns the SHA3-224 digest of the data.
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func Sum224(data []byte) (digest [28]byte) {
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h := New224()
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h.Write(data)
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h.Sum(digest[:0])
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return
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}
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// Sum256 returns the SHA3-256 digest of the data.
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func Sum256(data []byte) (digest [32]byte) {
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h := New256()
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h.Write(data)
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h.Sum(digest[:0])
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return
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}
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// Sum384 returns the SHA3-384 digest of the data.
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func Sum384(data []byte) (digest [48]byte) {
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h := New384()
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h.Write(data)
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h.Sum(digest[:0])
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return
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}
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// Sum512 returns the SHA3-512 digest of the data.
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func Sum512(data []byte) (digest [64]byte) {
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h := New512()
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h.Write(data)
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h.Sum(digest[:0])
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return
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}
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