Mercurial > projects > ldc
annotate tango/tango/io/digest/Sha01.d @ 179:c853a8a04cdc trunk
[svn r195] fixed some tango bugs (tango ticket 1093).
| author | lindquist |
|---|---|
| date | Wed, 07 May 2008 05:45:25 +0200 |
| parents | 1700239cab2e |
| children |
| rev | line source |
|---|---|
| 132 | 1 /******************************************************************************* |
| 2 | |
| 3 copyright: Copyright (c) 2006 Tango. All rights reserved | |
| 4 | |
| 5 license: BSD style: see doc/license.txt for details | |
| 6 | |
| 7 version: Initial release: Feb 2006 | |
| 8 | |
| 9 author: Regan Heath, Oskar Linde | |
| 10 | |
| 11 This module implements common parts of the SHA-0 and SHA-1 algoritms | |
| 12 | |
| 13 *******************************************************************************/ | |
| 14 | |
| 15 module tango.io.digest.Sha01; | |
| 16 | |
| 17 private import tango.core.ByteSwap; | |
| 18 | |
| 19 private import tango.io.digest.MerkleDamgard; | |
| 20 | |
| 21 /******************************************************************************* | |
| 22 | |
| 23 *******************************************************************************/ | |
| 24 | |
| 25 package abstract class Sha01 : MerkleDamgard | |
| 26 { | |
| 27 protected uint[5] context; | |
| 28 private static const ubyte padChar = 0x80; | |
| 29 package static const uint mask = 0x0000000F; | |
| 30 | |
| 31 /*********************************************************************** | |
| 32 | |
| 33 The digest size of Sha-0 and Sha-1 is 20 bytes | |
| 34 | |
| 35 ***********************************************************************/ | |
| 36 | |
| 37 final uint digestSize() { return 20; } | |
| 38 | |
| 39 /*********************************************************************** | |
| 40 | |
| 41 Initialize the cipher | |
| 42 | |
| 43 Remarks: | |
| 44 Returns the cipher state to it's initial value | |
| 45 | |
| 46 ***********************************************************************/ | |
| 47 | |
| 48 final protected override void reset() | |
| 49 { | |
| 50 super.reset(); | |
| 51 context[] = initial[]; | |
| 52 } | |
| 53 | |
| 54 /*********************************************************************** | |
| 55 | |
| 56 Obtain the digest | |
| 57 | |
| 58 Returns: | |
| 59 the digest | |
| 60 | |
| 61 Remarks: | |
| 62 Returns a digest of the current cipher state, this may be the | |
| 63 final digest, or a digest of the state between calls to update() | |
| 64 | |
| 65 ***********************************************************************/ | |
| 66 | |
| 67 final protected override void createDigest(ubyte[] buf) | |
| 68 { | |
| 69 version (LittleEndian) | |
| 70 ByteSwap.swap32 (context.ptr, context.length * uint.sizeof); | |
| 71 | |
| 72 buf[] = cast(ubyte[]) context; | |
| 73 } | |
| 74 | |
| 75 /*********************************************************************** | |
| 76 | |
| 77 block size | |
| 78 | |
| 79 Returns: | |
| 80 the block size | |
| 81 | |
| 82 Remarks: | |
| 83 Specifies the size (in bytes) of the block of data to pass to | |
| 84 each call to transform(). For SHA0 the blockSize is 64. | |
| 85 | |
| 86 ***********************************************************************/ | |
| 87 | |
| 88 final protected override uint blockSize() { return 64; } | |
| 89 | |
| 90 /*********************************************************************** | |
| 91 | |
| 92 Length padding size | |
| 93 | |
| 94 Returns: | |
| 95 the length padding size | |
| 96 | |
| 97 Remarks: | |
| 98 Specifies the size (in bytes) of the padding which uses the | |
| 99 length of the data which has been ciphered, this padding is | |
| 100 carried out by the padLength method. For SHA0 the addSize is 0. | |
| 101 | |
| 102 ***********************************************************************/ | |
| 103 | |
| 104 final protected override uint addSize() {return 8;} | |
| 105 | |
| 106 /*********************************************************************** | |
| 107 | |
| 108 Pads the cipher data | |
| 109 | |
| 110 Params: | |
| 111 data = a slice of the cipher buffer to fill with padding | |
| 112 | |
| 113 Remarks: | |
| 114 Fills the passed buffer slice with the appropriate padding for | |
| 115 the final call to transform(). This padding will fill the cipher | |
| 116 buffer up to blockSize()-addSize(). | |
| 117 | |
| 118 ***********************************************************************/ | |
| 119 | |
| 120 final protected override void padMessage(ubyte[] data) | |
| 121 { | |
| 122 data[0] = padChar; | |
| 123 data[1..$] = 0; | |
| 124 } | |
| 125 | |
| 126 /*********************************************************************** | |
| 127 | |
| 128 Performs the length padding | |
| 129 | |
| 130 Params: | |
| 131 data = the slice of the cipher buffer to fill with padding | |
| 132 length = the length of the data which has been ciphered | |
| 133 | |
| 134 Remarks: | |
| 135 Fills the passed buffer slice with addSize() bytes of padding | |
| 136 based on the length in bytes of the input data which has been | |
| 137 ciphered. | |
| 138 | |
| 139 ***********************************************************************/ | |
| 140 | |
| 141 final protected override void padLength(ubyte[] data, ulong length) | |
| 142 { | |
| 143 length <<= 3; | |
| 144 for(int j = data.length-1; j >= 0; j--) | |
| 145 data[$-j-1] = cast(ubyte) (length >> j*data.length); | |
| 146 } | |
| 147 | |
| 148 | |
| 149 /*********************************************************************** | |
| 150 | |
| 151 ***********************************************************************/ | |
| 152 | |
| 153 protected static uint f(uint t, uint B, uint C, uint D) | |
| 154 { | |
| 155 if (t < 20) return (B & C) | ((~B) & D); | |
| 156 else if (t < 40) return B ^ C ^ D; | |
| 157 else if (t < 60) return (B & C) | (B & D) | (C & D); | |
| 158 else return B ^ C ^ D; | |
| 159 } | |
| 160 | |
| 161 /*********************************************************************** | |
| 162 | |
| 163 ***********************************************************************/ | |
| 164 | |
|
179
c853a8a04cdc
[svn r195] fixed some tango bugs (tango ticket 1093).
lindquist
parents:
132
diff
changeset
|
165 protected static const uint[] K = |
| 132 | 166 [ |
| 167 0x5A827999, | |
| 168 0x6ED9EBA1, | |
| 169 0x8F1BBCDC, | |
| 170 0xCA62C1D6 | |
| 171 ]; | |
| 172 | |
| 173 /*********************************************************************** | |
| 174 | |
| 175 ***********************************************************************/ | |
| 176 | |
|
179
c853a8a04cdc
[svn r195] fixed some tango bugs (tango ticket 1093).
lindquist
parents:
132
diff
changeset
|
177 protected static const uint[5] initial = |
| 132 | 178 [ |
| 179 0x67452301, | |
| 180 0xEFCDAB89, | |
| 181 0x98BADCFE, | |
| 182 0x10325476, | |
| 183 0xC3D2E1F0 | |
| 184 ]; | |
| 185 } |