Mercurial > projects > dcrypt
annotate dcrypt/crypto/hashes/SHA256.d @ 2:71aae178f89a
Added copy() to hash functions. Modified some code style.
| author | Thomas Dixon <reikon@reikon.us> |
|---|---|
| date | Wed, 13 Aug 2008 22:01:19 -0400 |
| parents | 0e08791a1418 |
| children | a5789a7b3b3b |
| rev | line source |
|---|---|
| 0 | 1 /** |
| 2 * This file is part of the dcrypt project. | |
| 3 * | |
| 4 * Copyright: Copyright (C) dcrypt contributors 2008. All rights reserved. | |
| 5 * License: MIT | |
| 6 * Authors: Thomas Dixon | |
| 7 */ | |
| 8 | |
| 9 module dcrypt.crypto.hashes.SHA256; | |
| 10 | |
| 11 public import dcrypt.crypto.Hash; | |
| 12 | |
| 13 /** Implementation of SHA-256. */ | |
| 14 class SHA256 : Hash { | |
| 15 private const uint[] K = [ | |
| 16 0x428a2f98u, 0x71374491u, 0xb5c0fbcfu, 0xe9b5dba5u, | |
| 17 0x3956c25bu, 0x59f111f1u, 0x923f82a4u, 0xab1c5ed5u, | |
| 18 0xd807aa98u, 0x12835b01u, 0x243185beu, 0x550c7dc3u, | |
| 19 0x72be5d74u, 0x80deb1feu, 0x9bdc06a7u, 0xc19bf174u, | |
| 20 0xe49b69c1u, 0xefbe4786u, 0x0fc19dc6u, 0x240ca1ccu, | |
| 21 0x2de92c6fu, 0x4a7484aau, 0x5cb0a9dcu, 0x76f988dau, | |
| 22 0x983e5152u, 0xa831c66du, 0xb00327c8u, 0xbf597fc7u, | |
| 23 0xc6e00bf3u, 0xd5a79147u, 0x06ca6351u, 0x14292967u, | |
| 24 0x27b70a85u, 0x2e1b2138u, 0x4d2c6dfcu, 0x53380d13u, | |
| 25 0x650a7354u, 0x766a0abbu, 0x81c2c92eu, 0x92722c85u, | |
| 26 0xa2bfe8a1u, 0xa81a664bu, 0xc24b8b70u, 0xc76c51a3u, | |
| 27 0xd192e819u, 0xd6990624u, 0xf40e3585u, 0x106aa070u, | |
| 28 0x19a4c116u, 0x1e376c08u, 0x2748774cu, 0x34b0bcb5u, | |
| 29 0x391c0cb3u, 0x4ed8aa4au, 0x5b9cca4fu, 0x682e6ff3u, | |
| 30 0x748f82eeu, 0x78a5636fu, 0x84c87814u, 0x8cc70208u, | |
| 31 0x90befffau, 0xa4506cebu, 0xbef9a3f7u, 0xc67178f2u | |
| 32 ]; | |
| 33 protected uint h0, h1, h2, h3, h4, h5, h6, h7; | |
| 34 | |
| 35 this (void[] input_=null) { | |
| 36 reset(); | |
| 37 super(input_); | |
| 38 } | |
| 39 | |
| 40 uint blockSize() { | |
| 41 return 64; | |
| 42 } | |
| 43 | |
| 44 uint digestSize() { | |
| 45 return 32; | |
| 46 } | |
| 47 | |
| 48 char[] name() { | |
| 49 return "SHA256"; | |
| 50 } | |
| 51 | |
| 52 void transform(ubyte[] input) { | |
| 53 uint[] w = new uint[64]; | |
| 54 | |
| 55 for (int i = 0, j = 0; i < 16; i++,j+=4) | |
| 56 w[i] = Util.ubytesToUintBig(input, j); | |
| 57 | |
| 58 for (int i = 16; i < 64; i++) | |
| 59 w[i] = theta1(w[i-2]) + w[i-7] + theta0(w[i-15]) + w[i-16]; | |
| 60 | |
| 61 uint a = h0, | |
| 62 b = h1, | |
| 63 c = h2, | |
| 64 d = h3, | |
| 65 e = h4, | |
| 66 f = h5, | |
| 67 g = h6, | |
| 68 h = h7; | |
| 69 | |
| 70 for (int i = 0; i < 64; i++) { | |
| 71 uint t1 = h + sum1(e) + ch(e,f,g) + K[i] + w[i], | |
| 72 t2 = sum0(a) + maj(a,b,c); | |
| 73 h = g; | |
| 74 g = f; | |
| 75 f = e; | |
| 76 e = d + t1; | |
| 77 d = c; | |
| 78 c = b; | |
| 79 b = a; | |
| 80 a = t1 + t2; | |
| 81 } | |
| 82 | |
| 83 h0 += a; | |
| 84 h1 += b; | |
| 85 h2 += c; | |
| 86 h3 += d; | |
| 87 h4 += e; | |
| 88 h5 += f; | |
| 89 h6 += g; | |
| 90 h7 += h; | |
| 91 } | |
| 92 | |
| 93 private uint ch(uint x, uint y, uint z) { | |
| 94 return (x&y)^(~x&z); | |
| 95 } | |
| 96 | |
| 97 private uint maj(uint x, uint y, uint z) { | |
| 98 return (x&y)^(x&z)^(y&z); | |
| 99 } | |
| 100 | |
| 101 private uint sum0(uint x) { | |
| 102 return Util.rotateRight(x,2)^Util.rotateRight(x,13)^Util.rotateRight(x,22); | |
| 103 } | |
| 104 | |
| 105 private uint sum1(uint x) { | |
| 106 return Util.rotateRight(x,6)^Util.rotateRight(x,11)^Util.rotateRight(x,25); | |
| 107 } | |
| 108 | |
| 109 private uint theta0(uint x) { | |
| 110 return Util.rotateRight(x,7)^Util.rotateRight(x,18)^(x >> 3); | |
| 111 } | |
| 112 | |
| 113 private uint theta1(uint x) { | |
| 114 return Util.rotateRight(x,17)^Util.rotateRight(x,19)^(x >> 10); | |
| 115 } | |
| 116 | |
| 117 ubyte[] digest() { | |
| 118 padMessage(MODE_SHA); | |
| 119 ubyte[] result = new ubyte[digestSize]; | |
| 120 | |
| 121 Util.uintToUbytesBig(h0, result, 0); | |
| 122 Util.uintToUbytesBig(h1, result, 4); | |
| 123 Util.uintToUbytesBig(h2, result, 8); | |
| 124 Util.uintToUbytesBig(h3, result, 12); | |
| 125 Util.uintToUbytesBig(h4, result, 16); | |
| 126 Util.uintToUbytesBig(h5, result, 20); | |
| 127 Util.uintToUbytesBig(h6, result, 24); | |
| 128 Util.uintToUbytesBig(h7, result, 28); | |
| 129 | |
| 130 reset(); | |
| 131 return result; | |
| 132 } | |
| 133 | |
| 134 void reset() { | |
| 135 super.reset(); | |
| 136 h0 = 0x6a09e667u; | |
| 137 h1 = 0xbb67ae85u; | |
| 138 h2 = 0x3c6ef372u; | |
| 139 h3 = 0xa54ff53au; | |
| 140 h4 = 0x510e527fu; | |
| 141 h5 = 0x9b05688cu; | |
| 142 h6 = 0x1f83d9abu; | |
| 143 h7 = 0x5be0cd19u; | |
| 144 } | |
| 145 | |
|
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71aae178f89a
Added copy() to hash functions. Modified some code style.
Thomas Dixon <reikon@reikon.us>
parents:
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diff
changeset
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146 SHA256 copy() { |
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71aae178f89a
Added copy() to hash functions. Modified some code style.
Thomas Dixon <reikon@reikon.us>
parents:
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diff
changeset
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147 SHA256 h = new SHA256(buffer[0..index]); |
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148 h.h0 = h0; |
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149 h.h1 = h1; |
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150 h.h2 = h2; |
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151 h.h3 = h3; |
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152 h.h4 = h4; |
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153 h.h5 = h5; |
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parents:
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154 h.h6 = h6; |
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parents:
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155 h.h7 = h7; |
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156 return h; |
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71aae178f89a
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parents:
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157 } |
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parents:
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158 |
| 0 | 159 version (UnitTest) { |
| 160 unittest { | |
| 161 static const char[][] test_inputs = [ | |
| 162 "", | |
| 163 "abc", | |
| 164 "abcdbcdecdefdefgefghfghighijhijkijkljklmklmnlmnomnopnopq", | |
| 165 "a" | |
| 166 ]; | |
| 167 | |
| 168 static const int[] test_repeat = [ | |
| 169 1, 1, 1, 1000000 | |
| 170 ]; | |
| 171 | |
| 172 static const char[][] test_results = [ | |
| 173 "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", | |
| 174 "ba7816bf8f01cfea414140de5dae2223b00361a396177a9cb410ff61f20015ad", | |
| 175 "248d6a61d20638b8e5c026930c3e6039a33ce45964ff2167f6ecedd419db06c1", | |
| 176 "cdc76e5c9914fb9281a1c7e284d73e67f1809a48a497200e046d39ccc7112cd0" | |
| 177 ]; | |
| 178 | |
| 179 SHA256 h = new SHA256(); | |
| 180 foreach (uint i, char[] input; test_inputs) { | |
| 181 for (int j = 0; j < test_repeat[i]; j++) | |
| 182 h.update(input); | |
| 183 char[] digest = h.hexDigest(); | |
| 184 assert(digest == test_results[i], | |
|
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71aae178f89a
Added copy() to hash functions. Modified some code style.
Thomas Dixon <reikon@reikon.us>
parents:
0
diff
changeset
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185 h.name~": ("~digest~") != ("~test_results[i]~")"); |
| 0 | 186 } |
| 187 } | |
| 188 } | |
| 189 } |