github.com/ethereumproject/go-ethereum@v5.5.2+incompatible/crypto/sha3/hashes.go (about)

     1  // Copyright 2014 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package sha3
     6  
     7  // This file provides functions for creating instances of the SHA-3
     8  // and SHAKE hash functions, as well as utility functions for hashing
     9  // bytes.
    10  
    11  import (
    12  	"hash"
    13  )
    14  
    15  // NewKeccak256 creates a new Keccak-256 hash.
    16  func NewKeccak256() hash.Hash { return &state{rate: 136, outputLen: 32, dsbyte: 0x01} }
    17  
    18  // New224 creates a new SHA3-224 hash.
    19  // Its generic security strength is 224 bits against preimage attacks,
    20  // and 112 bits against collision attacks.
    21  func New224() hash.Hash { return &state{rate: 144, outputLen: 28, dsbyte: 0x06} }
    22  
    23  // New256 creates a new SHA3-256 hash.
    24  // Its generic security strength is 256 bits against preimage attacks,
    25  // and 128 bits against collision attacks.
    26  func New256() hash.Hash { return &state{rate: 136, outputLen: 32, dsbyte: 0x06} }
    27  
    28  // New384 creates a new SHA3-384 hash.
    29  // Its generic security strength is 384 bits against preimage attacks,
    30  // and 192 bits against collision attacks.
    31  func New384() hash.Hash { return &state{rate: 104, outputLen: 48, dsbyte: 0x06} }
    32  
    33  // New512 creates a new SHA3-512 hash.
    34  // Its generic security strength is 512 bits against preimage attacks,
    35  // and 256 bits against collision attacks.
    36  func New512() hash.Hash { return &state{rate: 72, outputLen: 64, dsbyte: 0x06} }
    37  
    38  // Sum224 returns the SHA3-224 digest of the data.
    39  func Sum224(data []byte) (digest [28]byte) {
    40  	h := New224()
    41  	h.Write(data)
    42  	h.Sum(digest[:0])
    43  	return
    44  }
    45  
    46  // Sum256 returns the SHA3-256 digest of the data.
    47  func Sum256(data []byte) (digest [32]byte) {
    48  	h := New256()
    49  	h.Write(data)
    50  	h.Sum(digest[:0])
    51  	return
    52  }
    53  
    54  // Sum384 returns the SHA3-384 digest of the data.
    55  func Sum384(data []byte) (digest [48]byte) {
    56  	h := New384()
    57  	h.Write(data)
    58  	h.Sum(digest[:0])
    59  	return
    60  }
    61  
    62  // Sum512 returns the SHA3-512 digest of the data.
    63  func Sum512(data []byte) (digest [64]byte) {
    64  	h := New512()
    65  	h.Write(data)
    66  	h.Sum(digest[:0])
    67  	return
    68  }