diff options
Diffstat (limited to 'sha3/hashes.go')
| -rw-r--r-- | sha3/hashes.go | 131 |
1 files changed, 49 insertions, 82 deletions
diff --git a/sha3/hashes.go b/sha3/hashes.go index 31fffbe..a51269d 100644 --- a/sha3/hashes.go +++ b/sha3/hashes.go @@ -2,127 +2,94 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. +// Package sha3 implements the SHA-3 hash algorithms and the SHAKE extendable +// output functions defined in FIPS 202. +// +// Most of this package is a wrapper around the crypto/sha3 package in the +// standard library. The only exception is the legacy Keccak hash functions. package sha3 -// This file provides functions for creating instances of the SHA-3 -// and SHAKE hash functions, as well as utility functions for hashing -// bytes. - import ( - "crypto" + "crypto/sha3" "hash" ) // New224 creates a new SHA3-224 hash. // Its generic security strength is 224 bits against preimage attacks, // and 112 bits against collision attacks. +// +// It is a wrapper for the [sha3.New224] function in the standard library. +// +//go:fix inline func New224() hash.Hash { - return new224() + return sha3.New224() } // New256 creates a new SHA3-256 hash. // Its generic security strength is 256 bits against preimage attacks, // and 128 bits against collision attacks. +// +// It is a wrapper for the [sha3.New256] function in the standard library. +// +//go:fix inline func New256() hash.Hash { - return new256() + return sha3.New256() } // New384 creates a new SHA3-384 hash. // Its generic security strength is 384 bits against preimage attacks, // and 192 bits against collision attacks. +// +// It is a wrapper for the [sha3.New384] function in the standard library. +// +//go:fix inline func New384() hash.Hash { - return new384() + return sha3.New384() } // New512 creates a new SHA3-512 hash. // Its generic security strength is 512 bits against preimage attacks, // and 256 bits against collision attacks. -func New512() hash.Hash { - return new512() -} - -func init() { - crypto.RegisterHash(crypto.SHA3_224, New224) - crypto.RegisterHash(crypto.SHA3_256, New256) - crypto.RegisterHash(crypto.SHA3_384, New384) - crypto.RegisterHash(crypto.SHA3_512, New512) -} - -const ( - dsbyteSHA3 = 0b00000110 - dsbyteKeccak = 0b00000001 - dsbyteShake = 0b00011111 - dsbyteCShake = 0b00000100 - - // rateK[c] is the rate in bytes for Keccak[c] where c is the capacity in - // bits. Given the sponge size is 1600 bits, the rate is 1600 - c bits. - rateK256 = (1600 - 256) / 8 - rateK448 = (1600 - 448) / 8 - rateK512 = (1600 - 512) / 8 - rateK768 = (1600 - 768) / 8 - rateK1024 = (1600 - 1024) / 8 -) - -func new224Generic() *state { - return &state{rate: rateK448, outputLen: 28, dsbyte: dsbyteSHA3} -} - -func new256Generic() *state { - return &state{rate: rateK512, outputLen: 32, dsbyte: dsbyteSHA3} -} - -func new384Generic() *state { - return &state{rate: rateK768, outputLen: 48, dsbyte: dsbyteSHA3} -} - -func new512Generic() *state { - return &state{rate: rateK1024, outputLen: 64, dsbyte: dsbyteSHA3} -} - -// NewLegacyKeccak256 creates a new Keccak-256 hash. // -// Only use this function if you require compatibility with an existing cryptosystem -// that uses non-standard padding. All other users should use New256 instead. -func NewLegacyKeccak256() hash.Hash { - return &state{rate: rateK512, outputLen: 32, dsbyte: dsbyteKeccak} -} - -// NewLegacyKeccak512 creates a new Keccak-512 hash. +// It is a wrapper for the [sha3.New512] function in the standard library. // -// Only use this function if you require compatibility with an existing cryptosystem -// that uses non-standard padding. All other users should use New512 instead. -func NewLegacyKeccak512() hash.Hash { - return &state{rate: rateK1024, outputLen: 64, dsbyte: dsbyteKeccak} +//go:fix inline +func New512() hash.Hash { + return sha3.New512() } // Sum224 returns the SHA3-224 digest of the data. -func Sum224(data []byte) (digest [28]byte) { - h := New224() - h.Write(data) - h.Sum(digest[:0]) - return +// +// It is a wrapper for the [sha3.Sum224] function in the standard library. +// +//go:fix inline +func Sum224(data []byte) [28]byte { + return sha3.Sum224(data) } // Sum256 returns the SHA3-256 digest of the data. -func Sum256(data []byte) (digest [32]byte) { - h := New256() - h.Write(data) - h.Sum(digest[:0]) - return +// +// It is a wrapper for the [sha3.Sum256] function in the standard library. +// +//go:fix inline +func Sum256(data []byte) [32]byte { + return sha3.Sum256(data) } // Sum384 returns the SHA3-384 digest of the data. -func Sum384(data []byte) (digest [48]byte) { - h := New384() - h.Write(data) - h.Sum(digest[:0]) - return +// +// It is a wrapper for the [sha3.Sum384] function in the standard library. +// +//go:fix inline +func Sum384(data []byte) [48]byte { + return sha3.Sum384(data) } // Sum512 returns the SHA3-512 digest of the data. -func Sum512(data []byte) (digest [64]byte) { - h := New512() - h.Write(data) - h.Sum(digest[:0]) - return +// +// It is a wrapper for the [sha3.Sum512] function in the standard library. +// +//go:fix inline +func Sum512(data []byte) [64]byte { + return sha3.Sum512(data) } |