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| 1 // Copyright 2004-2009 Google Inc. | |
| 2 // | |
| 3 // Licensed under the Apache License, Version 2.0 (the "License"); | |
| 4 // you may not use this file except in compliance with the License. | |
| 5 // You may obtain a copy of the License at | |
| 6 // | |
| 7 // http://www.apache.org/licenses/LICENSE-2.0 | |
| 8 // | |
| 9 // Unless required by applicable law or agreed to in writing, software | |
| 10 // distributed under the License is distributed on an "AS IS" BASIS, | |
| 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 12 // See the License for the specific language governing permissions and | |
| 13 // limitations under the License. | |
| 14 // ======================================================================== | |
| 15 | |
| 16 /* | |
| 17 * md5_opt.c V1.0 - optimized md5c.c from RFC1321 reference implementation | |
| 18 * | |
| 19 * Copyright (c) 1995 University of Southern California. | |
| 20 * All rights reserved. | |
| 21 * | |
| 22 * Redistribution and use in source and binary forms are permitted | |
| 23 * provided that the above copyright notice and this paragraph are | |
| 24 * duplicated in all such forms and that any documentation, advertising | |
| 25 * materials, and other materials related to such distribution and use | |
| 26 * acknowledge that the software was developed by the University of | |
| 27 * Southern California, Information Sciences Institute. The name of the | |
| 28 * University may not be used to endorse or promote products derived from | |
| 29 * this software without specific prior written permission. | |
| 30 * | |
| 31 * THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED | |
| 32 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF | |
| 33 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
| 34 * | |
| 35 J. Touch / touch@isi.edu | |
| 36 5/1/95 | |
| 37 | |
| 38 */ | |
| 39 /* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm | |
| 40 */ | |
| 41 | |
| 42 /* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All | |
| 43 rights reserved. | |
| 44 | |
| 45 License to copy and use this software is granted provided that it | |
| 46 is identified as the "RSA Data Security, Inc. MD5 Message-Digest | |
| 47 Algorithm" in all material mentioning or referencing this software | |
| 48 or this function. | |
| 49 | |
| 50 License is also granted to make and use derivative works provided | |
| 51 that such works are identified as "derived from the RSA Data | |
| 52 Security, Inc. MD5 Message-Digest Algorithm" in all material | |
| 53 mentioning or referencing the derived work. | |
| 54 | |
| 55 RSA Data Security, Inc. makes no representations concerning either | |
| 56 the merchantability of this software or the suitability of this | |
| 57 software for any particular purpose. It is provided "as is" | |
| 58 without express or implied warranty of any kind. | |
| 59 | |
| 60 These notices must be retained in any copies of any part of this | |
| 61 documentation and/or software. | |
| 62 */ | |
| 63 | |
| 64 #include "omaha/base/md5.h" | |
| 65 #include "omaha/base/debug.h" | |
| 66 | |
| 67 namespace omaha { | |
| 68 | |
| 69 #if (defined(i386) || defined (__i386__) || defined (_M_IX86) || defined(__alpha
)) // little-endian | |
| 70 #undef REORDER | |
| 71 #else | |
| 72 #define REORDER 1 | |
| 73 #endif | |
| 74 | |
| 75 // Constants for MD5Transform routine | |
| 76 #define kS11 7 | |
| 77 #define kS12 12 | |
| 78 #define kS13 17 | |
| 79 #define kS14 22 | |
| 80 #define kS21 5 | |
| 81 #define kS22 9 | |
| 82 #define kS23 14 | |
| 83 #define kS24 20 | |
| 84 #define kS31 4 | |
| 85 #define kS32 11 | |
| 86 #define kS33 16 | |
| 87 #define kS34 23 | |
| 88 #define kS41 6 | |
| 89 #define kS42 10 | |
| 90 #define kS43 15 | |
| 91 #define kS44 21 | |
| 92 | |
| 93 static void MD5Transform (uint32 [4], unsigned char [64]); | |
| 94 static void Encode (unsigned char *, uint32 *, unsigned int); | |
| 95 #ifdef REORDER | |
| 96 static void Decode (uint32 *, unsigned char *, unsigned int); | |
| 97 #endif | |
| 98 | |
| 99 // SELECTANY static unsigned char PADDING[64] = { | |
| 100 static unsigned char PADDING[64] = { | |
| 101 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
| 102 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, | |
| 103 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 | |
| 104 }; | |
| 105 | |
| 106 // F, G, H and I are basic MD5 functions. | |
| 107 #define F(x, y, z) (((x) & (y)) | ((~x) & (z))) | |
| 108 #define G(x, y, z) (((x) & (z)) | ((y) & (~z))) | |
| 109 #define H(x, y, z) ((x) ^ (y) ^ (z)) | |
| 110 #define I(x, y, z) ((y) ^ ((x) | (~z))) | |
| 111 | |
| 112 // ROTATE_LEFT rotates x left n bits. | |
| 113 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) | |
| 114 | |
| 115 // FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. | |
| 116 // Rotation is separate from addition to prevent recomputation. | |
| 117 #define FF(a, b, c, d, x, s, ac) { \ | |
| 118 (a) += F ((b), (c), (d)) + (x) + (uint32)(ac); \ | |
| 119 (a) = ROTATE_LEFT ((a), (s)); \ | |
| 120 (a) += (b); \ | |
| 121 } | |
| 122 #define GG(a, b, c, d, x, s, ac) { \ | |
| 123 (a) += G ((b), (c), (d)) + (x) + (uint32)(ac); \ | |
| 124 (a) = ROTATE_LEFT ((a), (s)); \ | |
| 125 (a) += (b); \ | |
| 126 } | |
| 127 #define HH(a, b, c, d, x, s, ac) { \ | |
| 128 (a) += H ((b), (c), (d)) + (x) + (uint32)(ac); \ | |
| 129 (a) = ROTATE_LEFT ((a), (s)); \ | |
| 130 (a) += (b); \ | |
| 131 } | |
| 132 #define II(a, b, c, d, x, s, ac) { \ | |
| 133 (a) += I ((b), (c), (d)) + (x) + (uint32)(ac); \ | |
| 134 (a) = ROTATE_LEFT ((a), (s)); \ | |
| 135 (a) += (b); \ | |
| 136 } | |
| 137 | |
| 138 // MD5 initialization. Begins an MD5 operation, writing a new context. | |
| 139 void MD5Init (MD5_CTX *context) { | |
| 140 ASSERT(context, (L"")); | |
| 141 | |
| 142 context->count[0] = context->count[1] = 0; | |
| 143 // Load magic initialization constants. | |
| 144 context->state[0] = 0x67452301; | |
| 145 context->state[1] = 0xefcdab89; | |
| 146 context->state[2] = 0x98badcfe; | |
| 147 context->state[3] = 0x10325476; | |
| 148 } | |
| 149 | |
| 150 // MD5 block update operation. Continues an MD5 message-digest | |
| 151 // operation, processing another message block, and updating the context. | |
| 152 void MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen) { | |
| 153 ASSERT(input, (L"")); | |
| 154 ASSERT(context, (L"")); | |
| 155 | |
| 156 unsigned int i, index, partLen; | |
| 157 | |
| 158 // Compute number of bytes mod 64 | |
| 159 index = (unsigned int)((context->count[0] >> 3) & 0x3F); | |
| 160 | |
| 161 // Update number of bits | |
| 162 if ((context->count[0] += ((uint32)inputLen << 3)) < ((uint32)inputLen << 3)
) | |
| 163 context->count[1]++; | |
| 164 | |
| 165 context->count[1] += ((uint32)inputLen >> 29); | |
| 166 partLen = 64 - index; | |
| 167 | |
| 168 // Transform as many times as possible | |
| 169 if (inputLen >= partLen) { | |
| 170 memcpy ((POINTER)&context->buffer[index], (POINTER)input, partLen); | |
| 171 MD5Transform (context->state, context->buffer); | |
| 172 | |
| 173 for (i = partLen; i + 63 < inputLen; i += 64) MD5Transform (context->stat
e, &input[i]); | |
| 174 index = 0; | |
| 175 } | |
| 176 else | |
| 177 i = 0; | |
| 178 | |
| 179 // Buffer remaining input | |
| 180 memcpy ((POINTER)&context->buffer[index], (POINTER)&input[i], inputLen-i); | |
| 181 } | |
| 182 | |
| 183 // MD5 finalization. Ends an MD5 message-digest operation, writing the | |
| 184 // the message digest and zeroizing the context. | |
| 185 void MD5Final (unsigned char digest[16], MD5_CTX *context) { | |
| 186 ASSERT(context, (L"")); | |
| 187 | |
| 188 unsigned char bits[8]; | |
| 189 unsigned int index, padLen; | |
| 190 | |
| 191 // Save number of bits | |
| 192 Encode (bits, context->count, 8); | |
| 193 | |
| 194 // Pad out to 56 mod 64. | |
| 195 index = (unsigned int)((context->count[0] >> 3) & 0x3f); | |
| 196 padLen = (index < 56) ? (56 - index) : (120 - index); | |
| 197 MD5Update (context, PADDING, padLen); | |
| 198 | |
| 199 // Append length (before padding) | |
| 200 MD5Update (context, bits, 8); | |
| 201 // Store state in digest | |
| 202 Encode (digest, context->state, 16); | |
| 203 | |
| 204 // Zeroize sensitive information. | |
| 205 memset ((POINTER)context, 0, sizeof (*context)); | |
| 206 } | |
| 207 | |
| 208 // MD5 basic transformation. Transforms state based on block. | |
| 209 void MD5Transform (uint32 state[4], unsigned char block[64]) { | |
| 210 // USC/ISI J. Touch - encourage pushing state variables into registers | |
| 211 register uint32 a = state[0], b = state[1], c = state[2], d = state[3]; | |
| 212 | |
| 213 /* USC/ISI J. Touch | |
| 214 decode and using copied data vs. direct use of input buffer | |
| 215 depends on whether reordering is required, which is a combination | |
| 216 of the byte order of the architecture and the command-line option | |
| 217 override | |
| 218 */ | |
| 219 | |
| 220 #ifdef REORDER | |
| 221 uint32 x[16]; | |
| 222 | |
| 223 Decode (x, block, 64); | |
| 224 | |
| 225 /* Round 1 */ | |
| 226 FF (a, b, c, d, x[ 0], kS11, 0xd76aa478); /* 1 */ | |
| 227 FF (d, a, b, c, x[ 1], kS12, 0xe8c7b756); /* 2 */ | |
| 228 FF (c, d, a, b, x[ 2], kS13, 0x242070db); /* 3 */ | |
| 229 FF (b, c, d, a, x[ 3], kS14, 0xc1bdceee); /* 4 */ | |
| 230 FF (a, b, c, d, x[ 4], kS11, 0xf57c0faf); /* 5 */ | |
| 231 FF (d, a, b, c, x[ 5], kS12, 0x4787c62a); /* 6 */ | |
| 232 FF (c, d, a, b, x[ 6], kS13, 0xa8304613); /* 7 */ | |
| 233 FF (b, c, d, a, x[ 7], kS14, 0xfd469501); /* 8 */ | |
| 234 FF (a, b, c, d, x[ 8], kS11, 0x698098d8); /* 9 */ | |
| 235 FF (d, a, b, c, x[ 9], kS12, 0x8b44f7af); /* 10 */ | |
| 236 FF (c, d, a, b, x[10], kS13, 0xffff5bb1); /* 11 */ | |
| 237 FF (b, c, d, a, x[11], kS14, 0x895cd7be); /* 12 */ | |
| 238 FF (a, b, c, d, x[12], kS11, 0x6b901122); /* 13 */ | |
| 239 FF (d, a, b, c, x[13], kS12, 0xfd987193); /* 14 */ | |
| 240 FF (c, d, a, b, x[14], kS13, 0xa679438e); /* 15 */ | |
| 241 FF (b, c, d, a, x[15], kS14, 0x49b40821); /* 16 */ | |
| 242 | |
| 243 /* Round 2 */ | |
| 244 GG (a, b, c, d, x[ 1], kS21, 0xf61e2562); /* 17 */ | |
| 245 GG (d, a, b, c, x[ 6], kS22, 0xc040b340); /* 18 */ | |
| 246 GG (c, d, a, b, x[11], kS23, 0x265e5a51); /* 19 */ | |
| 247 GG (b, c, d, a, x[ 0], kS24, 0xe9b6c7aa); /* 20 */ | |
| 248 GG (a, b, c, d, x[ 5], kS21, 0xd62f105d); /* 21 */ | |
| 249 GG (d, a, b, c, x[10], kS22, 0x2441453); /* 22 */ | |
| 250 GG (c, d, a, b, x[15], kS23, 0xd8a1e681); /* 23 */ | |
| 251 GG (b, c, d, a, x[ 4], kS24, 0xe7d3fbc8); /* 24 */ | |
| 252 GG (a, b, c, d, x[ 9], kS21, 0x21e1cde6); /* 25 */ | |
| 253 GG (d, a, b, c, x[14], kS22, 0xc33707d6); /* 26 */ | |
| 254 GG (c, d, a, b, x[ 3], kS23, 0xf4d50d87); /* 27 */ | |
| 255 GG (b, c, d, a, x[ 8], kS24, 0x455a14ed); /* 28 */ | |
| 256 GG (a, b, c, d, x[13], kS21, 0xa9e3e905); /* 29 */ | |
| 257 GG (d, a, b, c, x[ 2], kS22, 0xfcefa3f8); /* 30 */ | |
| 258 GG (c, d, a, b, x[ 7], kS23, 0x676f02d9); /* 31 */ | |
| 259 GG (b, c, d, a, x[12], kS24, 0x8d2a4c8a); /* 32 */ | |
| 260 | |
| 261 /* Round 3 */ | |
| 262 HH (a, b, c, d, x[ 5], kS31, 0xfffa3942); /* 33 */ | |
| 263 HH (d, a, b, c, x[ 8], kS32, 0x8771f681); /* 34 */ | |
| 264 HH (c, d, a, b, x[11], kS33, 0x6d9d6122); /* 35 */ | |
| 265 HH (b, c, d, a, x[14], kS34, 0xfde5380c); /* 36 */ | |
| 266 HH (a, b, c, d, x[ 1], kS31, 0xa4beea44); /* 37 */ | |
| 267 HH (d, a, b, c, x[ 4], kS32, 0x4bdecfa9); /* 38 */ | |
| 268 HH (c, d, a, b, x[ 7], kS33, 0xf6bb4b60); /* 39 */ | |
| 269 HH (b, c, d, a, x[10], kS34, 0xbebfbc70); /* 40 */ | |
| 270 HH (a, b, c, d, x[13], kS31, 0x289b7ec6); /* 41 */ | |
| 271 HH (d, a, b, c, x[ 0], kS32, 0xeaa127fa); /* 42 */ | |
| 272 HH (c, d, a, b, x[ 3], kS33, 0xd4ef3085); /* 43 */ | |
| 273 HH (b, c, d, a, x[ 6], kS34, 0x4881d05); /* 44 */ | |
| 274 HH (a, b, c, d, x[ 9], kS31, 0xd9d4d039); /* 45 */ | |
| 275 HH (d, a, b, c, x[12], kS32, 0xe6db99e5); /* 46 */ | |
| 276 HH (c, d, a, b, x[15], kS33, 0x1fa27cf8); /* 47 */ | |
| 277 HH (b, c, d, a, x[ 2], kS34, 0xc4ac5665); /* 48 */ | |
| 278 | |
| 279 /* Round 4 */ | |
| 280 II (a, b, c, d, x[ 0], kS41, 0xf4292244); /* 49 */ | |
| 281 II (d, a, b, c, x[ 7], kS42, 0x432aff97); /* 50 */ | |
| 282 II (c, d, a, b, x[14], kS43, 0xab9423a7); /* 51 */ | |
| 283 II (b, c, d, a, x[ 5], kS44, 0xfc93a039); /* 52 */ | |
| 284 II (a, b, c, d, x[12], kS41, 0x655b59c3); /* 53 */ | |
| 285 II (d, a, b, c, x[ 3], kS42, 0x8f0ccc92); /* 54 */ | |
| 286 II (c, d, a, b, x[10], kS43, 0xffeff47d); /* 55 */ | |
| 287 II (b, c, d, a, x[ 1], kS44, 0x85845dd1); /* 56 */ | |
| 288 II (a, b, c, d, x[ 8], kS41, 0x6fa87e4f); /* 57 */ | |
| 289 II (d, a, b, c, x[15], kS42, 0xfe2ce6e0); /* 58 */ | |
| 290 II (c, d, a, b, x[ 6], kS43, 0xa3014314); /* 59 */ | |
| 291 II (b, c, d, a, x[13], kS44, 0x4e0811a1); /* 60 */ | |
| 292 II (a, b, c, d, x[ 4], kS41, 0xf7537e82); /* 61 */ | |
| 293 II (d, a, b, c, x[11], kS42, 0xbd3af235); /* 62 */ | |
| 294 II (c, d, a, b, x[ 2], kS43, 0x2ad7d2bb); /* 63 */ | |
| 295 II (b, c, d, a, x[ 9], kS44, 0xeb86d391); /* 64 */ | |
| 296 | |
| 297 #else | |
| 298 // USC/ISI J. Touch | |
| 299 // omit reordering, and use the input block as source data | |
| 300 /* Round 1 */ | |
| 301 FF (a, b, c, d, ((uint32 *)block)[ 0], kS11, 0xd76aa478); /* 1 */ | |
| 302 FF (d, a, b, c, ((uint32 *)block)[ 1], kS12, 0xe8c7b756); /* 2 */ | |
| 303 FF (c, d, a, b, ((uint32 *)block)[ 2], kS13, 0x242070db); /* 3 */ | |
| 304 FF (b, c, d, a, ((uint32 *)block)[ 3], kS14, 0xc1bdceee); /* 4 */ | |
| 305 FF (a, b, c, d, ((uint32 *)block)[ 4], kS11, 0xf57c0faf); /* 5 */ | |
| 306 FF (d, a, b, c, ((uint32 *)block)[ 5], kS12, 0x4787c62a); /* 6 */ | |
| 307 FF (c, d, a, b, ((uint32 *)block)[ 6], kS13, 0xa8304613); /* 7 */ | |
| 308 FF (b, c, d, a, ((uint32 *)block)[ 7], kS14, 0xfd469501); /* 8 */ | |
| 309 FF (a, b, c, d, ((uint32 *)block)[ 8], kS11, 0x698098d8); /* 9 */ | |
| 310 FF (d, a, b, c, ((uint32 *)block)[ 9], kS12, 0x8b44f7af); /* 10 */ | |
| 311 FF (c, d, a, b, ((uint32 *)block)[10], kS13, 0xffff5bb1); /* 11 */ | |
| 312 FF (b, c, d, a, ((uint32 *)block)[11], kS14, 0x895cd7be); /* 12 */ | |
| 313 FF (a, b, c, d, ((uint32 *)block)[12], kS11, 0x6b901122); /* 13 */ | |
| 314 FF (d, a, b, c, ((uint32 *)block)[13], kS12, 0xfd987193); /* 14 */ | |
| 315 FF (c, d, a, b, ((uint32 *)block)[14], kS13, 0xa679438e); /* 15 */ | |
| 316 FF (b, c, d, a, ((uint32 *)block)[15], kS14, 0x49b40821); /* 16 */ | |
| 317 | |
| 318 /* Round 2 */ | |
| 319 GG (a, b, c, d, ((uint32 *)block)[ 1], kS21, 0xf61e2562); /* 17 */ | |
| 320 GG (d, a, b, c, ((uint32 *)block)[ 6], kS22, 0xc040b340); /* 18 */ | |
| 321 GG (c, d, a, b, ((uint32 *)block)[11], kS23, 0x265e5a51); /* 19 */ | |
| 322 GG (b, c, d, a, ((uint32 *)block)[ 0], kS24, 0xe9b6c7aa); /* 20 */ | |
| 323 GG (a, b, c, d, ((uint32 *)block)[ 5], kS21, 0xd62f105d); /* 21 */ | |
| 324 GG (d, a, b, c, ((uint32 *)block)[10], kS22, 0x2441453); /* 22 */ | |
| 325 GG (c, d, a, b, ((uint32 *)block)[15], kS23, 0xd8a1e681); /* 23 */ | |
| 326 GG (b, c, d, a, ((uint32 *)block)[ 4], kS24, 0xe7d3fbc8); /* 24 */ | |
| 327 GG (a, b, c, d, ((uint32 *)block)[ 9], kS21, 0x21e1cde6); /* 25 */ | |
| 328 GG (d, a, b, c, ((uint32 *)block)[14], kS22, 0xc33707d6); /* 26 */ | |
| 329 GG (c, d, a, b, ((uint32 *)block)[ 3], kS23, 0xf4d50d87); /* 27 */ | |
| 330 GG (b, c, d, a, ((uint32 *)block)[ 8], kS24, 0x455a14ed); /* 28 */ | |
| 331 GG (a, b, c, d, ((uint32 *)block)[13], kS21, 0xa9e3e905); /* 29 */ | |
| 332 GG (d, a, b, c, ((uint32 *)block)[ 2], kS22, 0xfcefa3f8); /* 30 */ | |
| 333 GG (c, d, a, b, ((uint32 *)block)[ 7], kS23, 0x676f02d9); /* 31 */ | |
| 334 GG (b, c, d, a, ((uint32 *)block)[12], kS24, 0x8d2a4c8a); /* 32 */ | |
| 335 | |
| 336 /* Round 3 */ | |
| 337 HH (a, b, c, d, ((uint32 *)block)[ 5], kS31, 0xfffa3942); /* 33 */ | |
| 338 HH (d, a, b, c, ((uint32 *)block)[ 8], kS32, 0x8771f681); /* 34 */ | |
| 339 HH (c, d, a, b, ((uint32 *)block)[11], kS33, 0x6d9d6122); /* 35 */ | |
| 340 HH (b, c, d, a, ((uint32 *)block)[14], kS34, 0xfde5380c); /* 36 */ | |
| 341 HH (a, b, c, d, ((uint32 *)block)[ 1], kS31, 0xa4beea44); /* 37 */ | |
| 342 HH (d, a, b, c, ((uint32 *)block)[ 4], kS32, 0x4bdecfa9); /* 38 */ | |
| 343 HH (c, d, a, b, ((uint32 *)block)[ 7], kS33, 0xf6bb4b60); /* 39 */ | |
| 344 HH (b, c, d, a, ((uint32 *)block)[10], kS34, 0xbebfbc70); /* 40 */ | |
| 345 HH (a, b, c, d, ((uint32 *)block)[13], kS31, 0x289b7ec6); /* 41 */ | |
| 346 HH (d, a, b, c, ((uint32 *)block)[ 0], kS32, 0xeaa127fa); /* 42 */ | |
| 347 HH (c, d, a, b, ((uint32 *)block)[ 3], kS33, 0xd4ef3085); /* 43 */ | |
| 348 HH (b, c, d, a, ((uint32 *)block)[ 6], kS34, 0x4881d05); /* 44 */ | |
| 349 HH (a, b, c, d, ((uint32 *)block)[ 9], kS31, 0xd9d4d039); /* 45 */ | |
| 350 HH (d, a, b, c, ((uint32 *)block)[12], kS32, 0xe6db99e5); /* 46 */ | |
| 351 HH (c, d, a, b, ((uint32 *)block)[15], kS33, 0x1fa27cf8); /* 47 */ | |
| 352 HH (b, c, d, a, ((uint32 *)block)[ 2], kS34, 0xc4ac5665); /* 48 */ | |
| 353 | |
| 354 /* Round 4 */ | |
| 355 II (a, b, c, d, ((uint32 *)block)[ 0], kS41, 0xf4292244); /* 49 */ | |
| 356 II (d, a, b, c, ((uint32 *)block)[ 7], kS42, 0x432aff97); /* 50 */ | |
| 357 II (c, d, a, b, ((uint32 *)block)[14], kS43, 0xab9423a7); /* 51 */ | |
| 358 II (b, c, d, a, ((uint32 *)block)[ 5], kS44, 0xfc93a039); /* 52 */ | |
| 359 II (a, b, c, d, ((uint32 *)block)[12], kS41, 0x655b59c3); /* 53 */ | |
| 360 II (d, a, b, c, ((uint32 *)block)[ 3], kS42, 0x8f0ccc92); /* 54 */ | |
| 361 II (c, d, a, b, ((uint32 *)block)[10], kS43, 0xffeff47d); /* 55 */ | |
| 362 II (b, c, d, a, ((uint32 *)block)[ 1], kS44, 0x85845dd1); /* 56 */ | |
| 363 II (a, b, c, d, ((uint32 *)block)[ 8], kS41, 0x6fa87e4f); /* 57 */ | |
| 364 II (d, a, b, c, ((uint32 *)block)[15], kS42, 0xfe2ce6e0); /* 58 */ | |
| 365 II (c, d, a, b, ((uint32 *)block)[ 6], kS43, 0xa3014314); /* 59 */ | |
| 366 II (b, c, d, a, ((uint32 *)block)[13], kS44, 0x4e0811a1); /* 60 */ | |
| 367 II (a, b, c, d, ((uint32 *)block)[ 4], kS41, 0xf7537e82); /* 61 */ | |
| 368 II (d, a, b, c, ((uint32 *)block)[11], kS42, 0xbd3af235); /* 62 */ | |
| 369 II (c, d, a, b, ((uint32 *)block)[ 2], kS43, 0x2ad7d2bb); /* 63 */ | |
| 370 II (b, c, d, a, ((uint32 *)block)[ 9], kS44, 0xeb86d391); /* 64 */ | |
| 371 #endif // REORDER | |
| 372 | |
| 373 state[0] += a; | |
| 374 state[1] += b; | |
| 375 state[2] += c; | |
| 376 state[3] += d; | |
| 377 | |
| 378 #ifdef REORDER | |
| 379 memset ((POINTER)x, 0, sizeof (x)); // zero sensitive information | |
| 380 #endif | |
| 381 } | |
| 382 | |
| 383 // Encodes input (uint32) into output (unsigned char). Assumes len is a multiple
of 4. | |
| 384 void Encode (unsigned char *output, uint32 *input, unsigned int len) { | |
| 385 ASSERT(input, (L"")); | |
| 386 ASSERT(output, (L"")); | |
| 387 | |
| 388 unsigned int i, j; | |
| 389 | |
| 390 for (i = 0, j = 0; j < len; i++, j += 4) { | |
| 391 output[j] = (unsigned char)(input[i] & 0xff); | |
| 392 output[j+1] = (unsigned char)((input[i] >> 8) & 0xff); | |
| 393 output[j+2] = (unsigned char)((input[i] >> 16) & 0xff); | |
| 394 output[j+3] = (unsigned char)((input[i] >> 24) & 0xff); | |
| 395 } | |
| 396 } | |
| 397 | |
| 398 #ifdef REORDER | |
| 399 | |
| 400 // Decodes input (unsigned char) into output (uint32). Assumes len is a multiple
of 4. | |
| 401 void Decode (uint32 *output, unsigned char *input, unsigned int len) { | |
| 402 ASSERT(input, (L"")); | |
| 403 ASSERT(output, (L"")); | |
| 404 | |
| 405 register uint32 out,other; | |
| 406 | |
| 407 // for (i = 0, j = 0; j < len; i++, j += 4) | |
| 408 // output[i] = ((uint32)input[j]) | (((uint32)input[j+1]) << 8) | | |
| 409 // (((uint32)input[j+2]) << 16) | (((uint32)input[j+3]) << 24); | |
| 410 | |
| 411 // USC/ISI J. Touch | |
| 412 // these are optimized swap routines, in C code they cost more in "computati
on" operations, but less in | |
| 413 // "loads" than the above code, and run substantially faster as a result | |
| 414 #if (!defined(hpux)) | |
| 415 #define swapbyte(src,dst) { \ | |
| 416 out = ROTATE_LEFT((src),16); \ | |
| 417 other = out >> 8; \ | |
| 418 other &= 0x00ff00ff; \ | |
| 419 out &= 0x00ff00ff; \ | |
| 420 out <<= 8; \ | |
| 421 (dst) = out | other; \ | |
| 422 } | |
| 423 #else | |
| 424 #define swapbyte(src,dst) { \ | |
| 425 (dst) = (ROTATE_LEFT((src),8) & 0x00ff00ff) | ROTATE_LEFT((src) & 0x00ff00f
f,24); \ | |
| 426 } | |
| 427 #endif | |
| 428 | |
| 429 // USC/ISI J. Touch | |
| 430 // unroll the loop above, because the code runs faster with constants for in
dices than even with variable indices | |
| 431 // as conventional (automatic) unrolling would perform (!) | |
| 432 swapbyte(((uint32 *)input)[0],output[0]); | |
| 433 swapbyte(((uint32 *)input)[1],output[1]); | |
| 434 swapbyte(((uint32 *)input)[2],output[2]); | |
| 435 swapbyte(((uint32 *)input)[3],output[3]); | |
| 436 swapbyte(((uint32 *)input)[4],output[4]); | |
| 437 swapbyte(((uint32 *)input)[5],output[5]); | |
| 438 swapbyte(((uint32 *)input)[6],output[6]); | |
| 439 swapbyte(((uint32 *)input)[7],output[7]); | |
| 440 swapbyte(((uint32 *)input)[8],output[8]); | |
| 441 swapbyte(((uint32 *)input)[9],output[9]); | |
| 442 swapbyte(((uint32 *)input)[10],output[10]); | |
| 443 swapbyte(((uint32 *)input)[11],output[11]); | |
| 444 swapbyte(((uint32 *)input)[12],output[12]); | |
| 445 swapbyte(((uint32 *)input)[13],output[13]); | |
| 446 swapbyte(((uint32 *)input)[14],output[14]); | |
| 447 swapbyte(((uint32 *)input)[15],output[15]); | |
| 448 } | |
| 449 | |
| 450 #endif // #ifdef REORDER | |
| 451 | |
| 452 } // namespace omaha | |
| 453 | |
| OLD | NEW |