Francois Berder / cyassl-lib

fork of cyassl-lib

Dependents:   TLS_cyassl TLS_cyassl

ctaocrypt/src/md5.c@4:f377303c41be, 2013-09-16 (annotated)

Committer:
feb11
Date:
Mon Sep 16 09:53:35 2013 +0000
Revision:
4:f377303c41be
Parent:
0:714293de3836 
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ashleymills 0:714293de3836 1 /* md5.c
ashleymills 0:714293de3836 2 *
ashleymills 0:714293de3836 3 * Copyright (C) 2006-2013 wolfSSL Inc.
ashleymills 0:714293de3836 4 *
ashleymills 0:714293de3836 5 * This file is part of CyaSSL.
ashleymills 0:714293de3836 6 *
ashleymills 0:714293de3836 7 * CyaSSL is free software; you can redistribute it and/or modify
ashleymills 0:714293de3836 8 * it under the terms of the GNU General Public License as published by
ashleymills 0:714293de3836 9 * the Free Software Foundation; either version 2 of the License, or
ashleymills 0:714293de3836 10 * (at your option) any later version.
ashleymills 0:714293de3836 11 *
ashleymills 0:714293de3836 12 * CyaSSL is distributed in the hope that it will be useful,
ashleymills 0:714293de3836 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ashleymills 0:714293de3836 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
ashleymills 0:714293de3836 15 * GNU General Public License for more details.
ashleymills 0:714293de3836 16 *
ashleymills 0:714293de3836 17 * You should have received a copy of the GNU General Public License
ashleymills 0:714293de3836 18 * along with this program; if not, write to the Free Software
ashleymills 0:714293de3836 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
ashleymills 0:714293de3836 20 */
ashleymills 0:714293de3836 21
ashleymills 0:714293de3836 22
ashleymills 0:714293de3836 23 #ifdef HAVE_CONFIG_H
ashleymills 0:714293de3836 24 #include <config.h>
ashleymills 0:714293de3836 25 #endif
ashleymills 0:714293de3836 26
ashleymills 0:714293de3836 27 #include <cyassl/ctaocrypt/settings.h>
ashleymills 0:714293de3836 28
ashleymills 0:714293de3836 29 #ifndef NO_MD5
ashleymills 0:714293de3836 30
ashleymills 0:714293de3836 31 #include <cyassl/ctaocrypt/md5.h>
ashleymills 0:714293de3836 32
ashleymills 0:714293de3836 33 #ifdef NO_INLINE
ashleymills 0:714293de3836 34 #include <cyassl/ctaocrypt/misc.h>
ashleymills 0:714293de3836 35 #else
ashleymills 0:714293de3836 36 #include <ctaocrypt/src/misc.c>
ashleymills 0:714293de3836 37 #endif
ashleymills 0:714293de3836 38
ashleymills 0:714293de3836 39
ashleymills 0:714293de3836 40 #ifdef STM32F2_HASH
ashleymills 0:714293de3836 41 /*
ashleymills 0:714293de3836 42 * STM32F2 hardware MD5 support through the STM32F2 standard peripheral
ashleymills 0:714293de3836 43 * library. Documentation located in STM32F2xx Standard Peripheral Library
ashleymills 0:714293de3836 44 * document (See note in README).
ashleymills 0:714293de3836 45 */
ashleymills 0:714293de3836 46 #include "stm32f2xx.h"
ashleymills 0:714293de3836 47
ashleymills 0:714293de3836 48 void InitMd5(Md5* md5)
ashleymills 0:714293de3836 49 {
ashleymills 0:714293de3836 50 /* STM32F2 struct notes:
ashleymills 0:714293de3836 51 * md5->buffer = first 4 bytes used to hold partial block if needed
ashleymills 0:714293de3836 52 * md5->buffLen = num bytes currently stored in md5->buffer
ashleymills 0:714293de3836 53 * md5->loLen = num bytes that have been written to STM32 FIFO
ashleymills 0:714293de3836 54 */
ashleymills 0:714293de3836 55 XMEMSET(md5->buffer, 0, MD5_REG_SIZE);
ashleymills 0:714293de3836 56
ashleymills 0:714293de3836 57 md5->buffLen = 0;
ashleymills 0:714293de3836 58 md5->loLen = 0;
ashleymills 0:714293de3836 59
ashleymills 0:714293de3836 60 /* initialize HASH peripheral */
ashleymills 0:714293de3836 61 HASH_DeInit();
ashleymills 0:714293de3836 62
ashleymills 0:714293de3836 63 /* configure algo used, algo mode, datatype */
ashleymills 0:714293de3836 64 HASH->CR &= ~ (HASH_CR_ALGO | HASH_CR_DATATYPE | HASH_CR_MODE);
ashleymills 0:714293de3836 65 HASH->CR |= (HASH_AlgoSelection_MD5 | HASH_AlgoMode_HASH
ashleymills 0:714293de3836 66 | HASH_DataType_8b);
ashleymills 0:714293de3836 67
ashleymills 0:714293de3836 68 /* reset HASH processor */
ashleymills 0:714293de3836 69 HASH->CR |= HASH_CR_INIT;
ashleymills 0:714293de3836 70 }
ashleymills 0:714293de3836 71
ashleymills 0:714293de3836 72 void Md5Update(Md5* md5, const byte* data, word32 len)
ashleymills 0:714293de3836 73 {
ashleymills 0:714293de3836 74 word32 i = 0;
ashleymills 0:714293de3836 75 word32 fill = 0;
ashleymills 0:714293de3836 76 word32 diff = 0;
ashleymills 0:714293de3836 77
ashleymills 0:714293de3836 78 /* if saved partial block is available */
ashleymills 0:714293de3836 79 if (md5->buffLen > 0) {
ashleymills 0:714293de3836 80 fill = 4 - md5->buffLen;
ashleymills 0:714293de3836 81
ashleymills 0:714293de3836 82 /* if enough data to fill, fill and push to FIFO */
ashleymills 0:714293de3836 83 if (fill <= len) {
ashleymills 0:714293de3836 84 XMEMCPY((byte*)md5->buffer + md5->buffLen, data, fill);
ashleymills 0:714293de3836 85 HASH_DataIn(*(uint32_t*)md5->buffer);
ashleymills 0:714293de3836 86
ashleymills 0:714293de3836 87 data += fill;
ashleymills 0:714293de3836 88 len -= fill;
ashleymills 0:714293de3836 89 md5->loLen += 4;
ashleymills 0:714293de3836 90 md5->buffLen = 0;
ashleymills 0:714293de3836 91 } else {
ashleymills 0:714293de3836 92 /* append partial to existing stored block */
ashleymills 0:714293de3836 93 XMEMCPY((byte*)md5->buffer + md5->buffLen, data, len);
ashleymills 0:714293de3836 94 md5->buffLen += len;
ashleymills 0:714293de3836 95 return;
ashleymills 0:714293de3836 96 }
ashleymills 0:714293de3836 97 }
ashleymills 0:714293de3836 98
ashleymills 0:714293de3836 99 /* write input block in the IN FIFO */
ashleymills 0:714293de3836 100 for (i = 0; i < len; i += 4)
ashleymills 0:714293de3836 101 {
ashleymills 0:714293de3836 102 diff = len - i;
ashleymills 0:714293de3836 103 if (diff < 4) {
ashleymills 0:714293de3836 104 /* store incomplete last block, not yet in FIFO */
ashleymills 0:714293de3836 105 XMEMSET(md5->buffer, 0, MD5_REG_SIZE);
ashleymills 0:714293de3836 106 XMEMCPY((byte*)md5->buffer, data, diff);
ashleymills 0:714293de3836 107 md5->buffLen = diff;
ashleymills 0:714293de3836 108 } else {
ashleymills 0:714293de3836 109 HASH_DataIn(*(uint32_t*)data);
ashleymills 0:714293de3836 110 data+=4;
ashleymills 0:714293de3836 111 }
ashleymills 0:714293de3836 112 }
ashleymills 0:714293de3836 113
ashleymills 0:714293de3836 114 /* keep track of total data length thus far */
ashleymills 0:714293de3836 115 md5->loLen += (len - md5->buffLen);
ashleymills 0:714293de3836 116 }
ashleymills 0:714293de3836 117
ashleymills 0:714293de3836 118 void Md5Final(Md5* md5, byte* hash)
ashleymills 0:714293de3836 119 {
ashleymills 0:714293de3836 120 __IO uint16_t nbvalidbitsdata = 0;
ashleymills 0:714293de3836 121
ashleymills 0:714293de3836 122 /* finish reading any trailing bytes into FIFO */
ashleymills 0:714293de3836 123 if (md5->buffLen > 0) {
ashleymills 0:714293de3836 124 HASH_DataIn(*(uint32_t*)md5->buffer);
ashleymills 0:714293de3836 125 md5->loLen += md5->buffLen;
ashleymills 0:714293de3836 126 }
ashleymills 0:714293de3836 127
ashleymills 0:714293de3836 128 /* calculate number of valid bits in last word of input data */
ashleymills 0:714293de3836 129 nbvalidbitsdata = 8 * (md5->loLen % MD5_REG_SIZE);
ashleymills 0:714293de3836 130
ashleymills 0:714293de3836 131 /* configure number of valid bits in last word of the data */
ashleymills 0:714293de3836 132 HASH_SetLastWordValidBitsNbr(nbvalidbitsdata);
ashleymills 0:714293de3836 133
ashleymills 0:714293de3836 134 /* start HASH processor */
ashleymills 0:714293de3836 135 HASH_StartDigest();
ashleymills 0:714293de3836 136
ashleymills 0:714293de3836 137 /* wait until Busy flag == RESET */
ashleymills 0:714293de3836 138 while (HASH_GetFlagStatus(HASH_FLAG_BUSY) != RESET) {}
ashleymills 0:714293de3836 139
ashleymills 0:714293de3836 140 /* read message digest */
ashleymills 0:714293de3836 141 md5->digest[0] = HASH->HR[0];
ashleymills 0:714293de3836 142 md5->digest[1] = HASH->HR[1];
ashleymills 0:714293de3836 143 md5->digest[2] = HASH->HR[2];
ashleymills 0:714293de3836 144 md5->digest[3] = HASH->HR[3];
ashleymills 0:714293de3836 145
ashleymills 0:714293de3836 146 ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE);
ashleymills 0:714293de3836 147
ashleymills 0:714293de3836 148 XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE);
ashleymills 0:714293de3836 149
ashleymills 0:714293de3836 150 InitMd5(md5); /* reset state */
ashleymills 0:714293de3836 151 }
ashleymills 0:714293de3836 152
ashleymills 0:714293de3836 153 #else /* CTaoCrypt software implementation */
ashleymills 0:714293de3836 154
ashleymills 0:714293de3836 155 #ifndef min
ashleymills 0:714293de3836 156
ashleymills 0:714293de3836 157 static INLINE word32 min(word32 a, word32 b)
ashleymills 0:714293de3836 158 {
ashleymills 0:714293de3836 159 return a > b ? b : a;
ashleymills 0:714293de3836 160 }
ashleymills 0:714293de3836 161
ashleymills 0:714293de3836 162 #endif /* min */
ashleymills 0:714293de3836 163
ashleymills 0:714293de3836 164
ashleymills 0:714293de3836 165 void InitMd5(Md5* md5)
ashleymills 0:714293de3836 166 {
ashleymills 0:714293de3836 167 md5->digest[0] = 0x67452301L;
ashleymills 0:714293de3836 168 md5->digest[1] = 0xefcdab89L;
ashleymills 0:714293de3836 169 md5->digest[2] = 0x98badcfeL;
ashleymills 0:714293de3836 170 md5->digest[3] = 0x10325476L;
ashleymills 0:714293de3836 171
ashleymills 0:714293de3836 172 md5->buffLen = 0;
ashleymills 0:714293de3836 173 md5->loLen = 0;
ashleymills 0:714293de3836 174 md5->hiLen = 0;
ashleymills 0:714293de3836 175 }
ashleymills 0:714293de3836 176
ashleymills 0:714293de3836 177
ashleymills 0:714293de3836 178 static void Transform(Md5* md5)
ashleymills 0:714293de3836 179 {
ashleymills 0:714293de3836 180 #define F1(x, y, z) (z ^ (x & (y ^ z)))
ashleymills 0:714293de3836 181 #define F2(x, y, z) F1(z, x, y)
ashleymills 0:714293de3836 182 #define F3(x, y, z) (x ^ y ^ z)
ashleymills 0:714293de3836 183 #define F4(x, y, z) (y ^ (x | ~z))
ashleymills 0:714293de3836 184
ashleymills 0:714293de3836 185 #define MD5STEP(f, w, x, y, z, data, s) \
ashleymills 0:714293de3836 186 w = rotlFixed(w + f(x, y, z) + data, s) + x
ashleymills 0:714293de3836 187
ashleymills 0:714293de3836 188 /* Copy context->state[] to working vars */
ashleymills 0:714293de3836 189 word32 a = md5->digest[0];
ashleymills 0:714293de3836 190 word32 b = md5->digest[1];
ashleymills 0:714293de3836 191 word32 c = md5->digest[2];
ashleymills 0:714293de3836 192 word32 d = md5->digest[3];
ashleymills 0:714293de3836 193
ashleymills 0:714293de3836 194 MD5STEP(F1, a, b, c, d, md5->buffer[0] + 0xd76aa478, 7);
ashleymills 0:714293de3836 195 MD5STEP(F1, d, a, b, c, md5->buffer[1] + 0xe8c7b756, 12);
ashleymills 0:714293de3836 196 MD5STEP(F1, c, d, a, b, md5->buffer[2] + 0x242070db, 17);
ashleymills 0:714293de3836 197 MD5STEP(F1, b, c, d, a, md5->buffer[3] + 0xc1bdceee, 22);
ashleymills 0:714293de3836 198 MD5STEP(F1, a, b, c, d, md5->buffer[4] + 0xf57c0faf, 7);
ashleymills 0:714293de3836 199 MD5STEP(F1, d, a, b, c, md5->buffer[5] + 0x4787c62a, 12);
ashleymills 0:714293de3836 200 MD5STEP(F1, c, d, a, b, md5->buffer[6] + 0xa8304613, 17);
ashleymills 0:714293de3836 201 MD5STEP(F1, b, c, d, a, md5->buffer[7] + 0xfd469501, 22);
ashleymills 0:714293de3836 202 MD5STEP(F1, a, b, c, d, md5->buffer[8] + 0x698098d8, 7);
ashleymills 0:714293de3836 203 MD5STEP(F1, d, a, b, c, md5->buffer[9] + 0x8b44f7af, 12);
ashleymills 0:714293de3836 204 MD5STEP(F1, c, d, a, b, md5->buffer[10] + 0xffff5bb1, 17);
ashleymills 0:714293de3836 205 MD5STEP(F1, b, c, d, a, md5->buffer[11] + 0x895cd7be, 22);
ashleymills 0:714293de3836 206 MD5STEP(F1, a, b, c, d, md5->buffer[12] + 0x6b901122, 7);
ashleymills 0:714293de3836 207 MD5STEP(F1, d, a, b, c, md5->buffer[13] + 0xfd987193, 12);
ashleymills 0:714293de3836 208 MD5STEP(F1, c, d, a, b, md5->buffer[14] + 0xa679438e, 17);
ashleymills 0:714293de3836 209 MD5STEP(F1, b, c, d, a, md5->buffer[15] + 0x49b40821, 22);
ashleymills 0:714293de3836 210
ashleymills 0:714293de3836 211 MD5STEP(F2, a, b, c, d, md5->buffer[1] + 0xf61e2562, 5);
ashleymills 0:714293de3836 212 MD5STEP(F2, d, a, b, c, md5->buffer[6] + 0xc040b340, 9);
ashleymills 0:714293de3836 213 MD5STEP(F2, c, d, a, b, md5->buffer[11] + 0x265e5a51, 14);
ashleymills 0:714293de3836 214 MD5STEP(F2, b, c, d, a, md5->buffer[0] + 0xe9b6c7aa, 20);
ashleymills 0:714293de3836 215 MD5STEP(F2, a, b, c, d, md5->buffer[5] + 0xd62f105d, 5);
ashleymills 0:714293de3836 216 MD5STEP(F2, d, a, b, c, md5->buffer[10] + 0x02441453, 9);
ashleymills 0:714293de3836 217 MD5STEP(F2, c, d, a, b, md5->buffer[15] + 0xd8a1e681, 14);
ashleymills 0:714293de3836 218 MD5STEP(F2, b, c, d, a, md5->buffer[4] + 0xe7d3fbc8, 20);
ashleymills 0:714293de3836 219 MD5STEP(F2, a, b, c, d, md5->buffer[9] + 0x21e1cde6, 5);
ashleymills 0:714293de3836 220 MD5STEP(F2, d, a, b, c, md5->buffer[14] + 0xc33707d6, 9);
ashleymills 0:714293de3836 221 MD5STEP(F2, c, d, a, b, md5->buffer[3] + 0xf4d50d87, 14);
ashleymills 0:714293de3836 222 MD5STEP(F2, b, c, d, a, md5->buffer[8] + 0x455a14ed, 20);
ashleymills 0:714293de3836 223 MD5STEP(F2, a, b, c, d, md5->buffer[13] + 0xa9e3e905, 5);
ashleymills 0:714293de3836 224 MD5STEP(F2, d, a, b, c, md5->buffer[2] + 0xfcefa3f8, 9);
ashleymills 0:714293de3836 225 MD5STEP(F2, c, d, a, b, md5->buffer[7] + 0x676f02d9, 14);
ashleymills 0:714293de3836 226 MD5STEP(F2, b, c, d, a, md5->buffer[12] + 0x8d2a4c8a, 20);
ashleymills 0:714293de3836 227
ashleymills 0:714293de3836 228 MD5STEP(F3, a, b, c, d, md5->buffer[5] + 0xfffa3942, 4);
ashleymills 0:714293de3836 229 MD5STEP(F3, d, a, b, c, md5->buffer[8] + 0x8771f681, 11);
ashleymills 0:714293de3836 230 MD5STEP(F3, c, d, a, b, md5->buffer[11] + 0x6d9d6122, 16);
ashleymills 0:714293de3836 231 MD5STEP(F3, b, c, d, a, md5->buffer[14] + 0xfde5380c, 23);
ashleymills 0:714293de3836 232 MD5STEP(F3, a, b, c, d, md5->buffer[1] + 0xa4beea44, 4);
ashleymills 0:714293de3836 233 MD5STEP(F3, d, a, b, c, md5->buffer[4] + 0x4bdecfa9, 11);
ashleymills 0:714293de3836 234 MD5STEP(F3, c, d, a, b, md5->buffer[7] + 0xf6bb4b60, 16);
ashleymills 0:714293de3836 235 MD5STEP(F3, b, c, d, a, md5->buffer[10] + 0xbebfbc70, 23);
ashleymills 0:714293de3836 236 MD5STEP(F3, a, b, c, d, md5->buffer[13] + 0x289b7ec6, 4);
ashleymills 0:714293de3836 237 MD5STEP(F3, d, a, b, c, md5->buffer[0] + 0xeaa127fa, 11);
ashleymills 0:714293de3836 238 MD5STEP(F3, c, d, a, b, md5->buffer[3] + 0xd4ef3085, 16);
ashleymills 0:714293de3836 239 MD5STEP(F3, b, c, d, a, md5->buffer[6] + 0x04881d05, 23);
ashleymills 0:714293de3836 240 MD5STEP(F3, a, b, c, d, md5->buffer[9] + 0xd9d4d039, 4);
ashleymills 0:714293de3836 241 MD5STEP(F3, d, a, b, c, md5->buffer[12] + 0xe6db99e5, 11);
ashleymills 0:714293de3836 242 MD5STEP(F3, c, d, a, b, md5->buffer[15] + 0x1fa27cf8, 16);
ashleymills 0:714293de3836 243 MD5STEP(F3, b, c, d, a, md5->buffer[2] + 0xc4ac5665, 23);
ashleymills 0:714293de3836 244
ashleymills 0:714293de3836 245 MD5STEP(F4, a, b, c, d, md5->buffer[0] + 0xf4292244, 6);
ashleymills 0:714293de3836 246 MD5STEP(F4, d, a, b, c, md5->buffer[7] + 0x432aff97, 10);
ashleymills 0:714293de3836 247 MD5STEP(F4, c, d, a, b, md5->buffer[14] + 0xab9423a7, 15);
ashleymills 0:714293de3836 248 MD5STEP(F4, b, c, d, a, md5->buffer[5] + 0xfc93a039, 21);
ashleymills 0:714293de3836 249 MD5STEP(F4, a, b, c, d, md5->buffer[12] + 0x655b59c3, 6);
ashleymills 0:714293de3836 250 MD5STEP(F4, d, a, b, c, md5->buffer[3] + 0x8f0ccc92, 10);
ashleymills 0:714293de3836 251 MD5STEP(F4, c, d, a, b, md5->buffer[10] + 0xffeff47d, 15);
ashleymills 0:714293de3836 252 MD5STEP(F4, b, c, d, a, md5->buffer[1] + 0x85845dd1, 21);
ashleymills 0:714293de3836 253 MD5STEP(F4, a, b, c, d, md5->buffer[8] + 0x6fa87e4f, 6);
ashleymills 0:714293de3836 254 MD5STEP(F4, d, a, b, c, md5->buffer[15] + 0xfe2ce6e0, 10);
ashleymills 0:714293de3836 255 MD5STEP(F4, c, d, a, b, md5->buffer[6] + 0xa3014314, 15);
ashleymills 0:714293de3836 256 MD5STEP(F4, b, c, d, a, md5->buffer[13] + 0x4e0811a1, 21);
ashleymills 0:714293de3836 257 MD5STEP(F4, a, b, c, d, md5->buffer[4] + 0xf7537e82, 6);
ashleymills 0:714293de3836 258 MD5STEP(F4, d, a, b, c, md5->buffer[11] + 0xbd3af235, 10);
ashleymills 0:714293de3836 259 MD5STEP(F4, c, d, a, b, md5->buffer[2] + 0x2ad7d2bb, 15);
ashleymills 0:714293de3836 260 MD5STEP(F4, b, c, d, a, md5->buffer[9] + 0xeb86d391, 21);
ashleymills 0:714293de3836 261
ashleymills 0:714293de3836 262 /* Add the working vars back into digest state[] */
ashleymills 0:714293de3836 263 md5->digest[0] += a;
ashleymills 0:714293de3836 264 md5->digest[1] += b;
ashleymills 0:714293de3836 265 md5->digest[2] += c;
ashleymills 0:714293de3836 266 md5->digest[3] += d;
ashleymills 0:714293de3836 267 }
ashleymills 0:714293de3836 268
ashleymills 0:714293de3836 269
ashleymills 0:714293de3836 270 static INLINE void AddLength(Md5* md5, word32 len)
ashleymills 0:714293de3836 271 {
ashleymills 0:714293de3836 272 word32 tmp = md5->loLen;
ashleymills 0:714293de3836 273 if ( (md5->loLen += len) < tmp)
ashleymills 0:714293de3836 274 md5->hiLen++; /* carry low to high */
ashleymills 0:714293de3836 275 }
ashleymills 0:714293de3836 276
ashleymills 0:714293de3836 277
ashleymills 0:714293de3836 278 void Md5Update(Md5* md5, const byte* data, word32 len)
ashleymills 0:714293de3836 279 {
ashleymills 0:714293de3836 280 /* do block size increments */
ashleymills 0:714293de3836 281 byte* local = (byte*)md5->buffer;
ashleymills 0:714293de3836 282
ashleymills 0:714293de3836 283 while (len) {
ashleymills 0:714293de3836 284 word32 add = min(len, MD5_BLOCK_SIZE - md5->buffLen);
ashleymills 0:714293de3836 285 XMEMCPY(&local[md5->buffLen], data, add);
ashleymills 0:714293de3836 286
ashleymills 0:714293de3836 287 md5->buffLen += add;
ashleymills 0:714293de3836 288 data += add;
ashleymills 0:714293de3836 289 len -= add;
ashleymills 0:714293de3836 290
ashleymills 0:714293de3836 291 if (md5->buffLen == MD5_BLOCK_SIZE) {
ashleymills 0:714293de3836 292 #ifdef BIG_ENDIAN_ORDER
ashleymills 0:714293de3836 293 ByteReverseBytes(local, local, MD5_BLOCK_SIZE);
ashleymills 0:714293de3836 294 #endif
ashleymills 0:714293de3836 295 Transform(md5);
ashleymills 0:714293de3836 296 AddLength(md5, MD5_BLOCK_SIZE);
ashleymills 0:714293de3836 297 md5->buffLen = 0;
ashleymills 0:714293de3836 298 }
ashleymills 0:714293de3836 299 }
ashleymills 0:714293de3836 300 }
ashleymills 0:714293de3836 301
ashleymills 0:714293de3836 302
ashleymills 0:714293de3836 303 void Md5Final(Md5* md5, byte* hash)
ashleymills 0:714293de3836 304 {
ashleymills 0:714293de3836 305 byte* local = (byte*)md5->buffer;
ashleymills 0:714293de3836 306
ashleymills 0:714293de3836 307 AddLength(md5, md5->buffLen); /* before adding pads */
ashleymills 0:714293de3836 308
ashleymills 0:714293de3836 309 local[md5->buffLen++] = 0x80; /* add 1 */
ashleymills 0:714293de3836 310
ashleymills 0:714293de3836 311 /* pad with zeros */
ashleymills 0:714293de3836 312 if (md5->buffLen > MD5_PAD_SIZE) {
ashleymills 0:714293de3836 313 XMEMSET(&local[md5->buffLen], 0, MD5_BLOCK_SIZE - md5->buffLen);
ashleymills 0:714293de3836 314 md5->buffLen += MD5_BLOCK_SIZE - md5->buffLen;
ashleymills 0:714293de3836 315
ashleymills 0:714293de3836 316 #ifdef BIG_ENDIAN_ORDER
ashleymills 0:714293de3836 317 ByteReverseBytes(local, local, MD5_BLOCK_SIZE);
ashleymills 0:714293de3836 318 #endif
ashleymills 0:714293de3836 319 Transform(md5);
ashleymills 0:714293de3836 320 md5->buffLen = 0;
ashleymills 0:714293de3836 321 }
ashleymills 0:714293de3836 322 XMEMSET(&local[md5->buffLen], 0, MD5_PAD_SIZE - md5->buffLen);
ashleymills 0:714293de3836 323
ashleymills 0:714293de3836 324 /* put lengths in bits */
ashleymills 0:714293de3836 325 md5->hiLen = (md5->loLen >> (8*sizeof(md5->loLen) - 3)) +
ashleymills 0:714293de3836 326 (md5->hiLen << 3);
ashleymills 0:714293de3836 327 md5->loLen = md5->loLen << 3;
ashleymills 0:714293de3836 328
ashleymills 0:714293de3836 329 /* store lengths */
ashleymills 0:714293de3836 330 #ifdef BIG_ENDIAN_ORDER
ashleymills 0:714293de3836 331 ByteReverseBytes(local, local, MD5_BLOCK_SIZE);
ashleymills 0:714293de3836 332 #endif
ashleymills 0:714293de3836 333 /* ! length ordering dependent on digest endian type ! */
ashleymills 0:714293de3836 334 XMEMCPY(&local[MD5_PAD_SIZE], &md5->loLen, sizeof(word32));
ashleymills 0:714293de3836 335 XMEMCPY(&local[MD5_PAD_SIZE + sizeof(word32)], &md5->hiLen, sizeof(word32));
ashleymills 0:714293de3836 336
ashleymills 0:714293de3836 337 Transform(md5);
ashleymills 0:714293de3836 338 #ifdef BIG_ENDIAN_ORDER
ashleymills 0:714293de3836 339 ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE);
ashleymills 0:714293de3836 340 #endif
ashleymills 0:714293de3836 341 XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE);
ashleymills 0:714293de3836 342
ashleymills 0:714293de3836 343 InitMd5(md5); /* reset state */
ashleymills 0:714293de3836 344 }
ashleymills 0:714293de3836 345
ashleymills 0:714293de3836 346 #endif /* STM32F2_HASH */
ashleymills 0:714293de3836 347
ashleymills 0:714293de3836 348 #endif /* NO_MD5 */