github.com/graybobo/golang.org-package-offline-cache@v0.0.0-20200626051047-6608995c132f/x/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  // New224 creates a new SHA3-224 hash.
    16  // Its generic security strength is 224 bits against preimage attacks,
    17  // and 112 bits against collision attacks.
    18  func New224() hash.Hash { return &state{rate: 144, outputLen: 28, dsbyte: 0x06} }
    19  
    20  // New256 creates a new SHA3-256 hash.
    21  // Its generic security strength is 256 bits against preimage attacks,
    22  // and 128 bits against collision attacks.
    23  func New256() hash.Hash { return &state{rate: 136, outputLen: 32, dsbyte: 0x06} }
    24  
    25  // New384 creates a new SHA3-384 hash.
    26  // Its generic security strength is 384 bits against preimage attacks,
    27  // and 192 bits against collision attacks.
    28  func New384() hash.Hash { return &state{rate: 104, outputLen: 48, dsbyte: 0x06} }
    29  
    30  // New512 creates a new SHA3-512 hash.
    31  // Its generic security strength is 512 bits against preimage attacks,
    32  // and 256 bits against collision attacks.
    33  func New512() hash.Hash { return &state{rate: 72, outputLen: 64, dsbyte: 0x06} }
    34  
    35  // Sum224 returns the SHA3-224 digest of the data.
    36  func Sum224(data []byte) (digest [28]byte) {
    37  	h := New224()
    38  	h.Write(data)
    39  	h.Sum(digest[:0])
    40  	return
    41  }
    42  
    43  // Sum256 returns the SHA3-256 digest of the data.
    44  func Sum256(data []byte) (digest [32]byte) {
    45  	h := New256()
    46  	h.Write(data)
    47  	h.Sum(digest[:0])
    48  	return
    49  }
    50  
    51  // Sum384 returns the SHA3-384 digest of the data.
    52  func Sum384(data []byte) (digest [48]byte) {
    53  	h := New384()
    54  	h.Write(data)
    55  	h.Sum(digest[:0])
    56  	return
    57  }
    58  
    59  // Sum512 returns the SHA3-512 digest of the data.
    60  func Sum512(data []byte) (digest [64]byte) {
    61  	h := New512()
    62  	h.Write(data)
    63  	h.Sum(digest[:0])
    64  	return
    65  }