Ashley Mills / Encrypted

cyassl re-port with cellular comms, PSK test

Dependencies:   VodafoneUSBModem_bleedingedge2 mbed-rtos mbed-src

cyassllib/ctaocrypt/src/md5.c@0:e979170e02e7, 2013-04-26 (annotated)

Committer:
ashleymills
Date:
Fri Apr 26 16:54:58 2013 +0000
Revision:
0:e979170e02e7
Basic operation of SSL with PSK working for cellular.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
ashleymills 0:e979170e02e7 1 /* md5.c
ashleymills 0:e979170e02e7 2 *
ashleymills 0:e979170e02e7 3 * Copyright (C) 2006-2012 Sawtooth Consulting Ltd.
ashleymills 0:e979170e02e7 4 *
ashleymills 0:e979170e02e7 5 * This file is part of CyaSSL.
ashleymills 0:e979170e02e7 6 *
ashleymills 0:e979170e02e7 7 * CyaSSL is free software; you can redistribute it and/or modify
ashleymills 0:e979170e02e7 8 * it under the terms of the GNU General Public License as published by
ashleymills 0:e979170e02e7 9 * the Free Software Foundation; either version 2 of the License, or
ashleymills 0:e979170e02e7 10 * (at your option) any later version.
ashleymills 0:e979170e02e7 11 *
ashleymills 0:e979170e02e7 12 * CyaSSL is distributed in the hope that it will be useful,
ashleymills 0:e979170e02e7 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
ashleymills 0:e979170e02e7 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
ashleymills 0:e979170e02e7 15 * GNU General Public License for more details.
ashleymills 0:e979170e02e7 16 *
ashleymills 0:e979170e02e7 17 * You should have received a copy of the GNU General Public License
ashleymills 0:e979170e02e7 18 * along with this program; if not, write to the Free Software
ashleymills 0:e979170e02e7 19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
ashleymills 0:e979170e02e7 20 */
ashleymills 0:e979170e02e7 21
ashleymills 0:e979170e02e7 22
ashleymills 0:e979170e02e7 23 #ifdef HAVE_CONFIG_H
ashleymills 0:e979170e02e7 24 #include <config.h>
ashleymills 0:e979170e02e7 25 #endif
ashleymills 0:e979170e02e7 26
ashleymills 0:e979170e02e7 27 #include <cyassl/ctaocrypt/md5.h>
ashleymills 0:e979170e02e7 28
ashleymills 0:e979170e02e7 29 #ifdef NO_INLINE
ashleymills 0:e979170e02e7 30 #include <cyassl/ctaocrypt/misc.h>
ashleymills 0:e979170e02e7 31 #else
ashleymills 0:e979170e02e7 32 #include <ctaocrypt/src/misc.c>
ashleymills 0:e979170e02e7 33 #endif
ashleymills 0:e979170e02e7 34
ashleymills 0:e979170e02e7 35
ashleymills 0:e979170e02e7 36 #ifdef STM32F2_CRYPTO
ashleymills 0:e979170e02e7 37 /*
ashleymills 0:e979170e02e7 38 * STM32F2 hardware MD5 support through the STM32F2 standard peripheral
ashleymills 0:e979170e02e7 39 * library. Documentation located in STM32F2xx Standard Peripheral Library
ashleymills 0:e979170e02e7 40 * document (See note in README).
ashleymills 0:e979170e02e7 41 */
ashleymills 0:e979170e02e7 42 #include "stm32f2xx.h"
ashleymills 0:e979170e02e7 43
ashleymills 0:e979170e02e7 44 void InitMd5(Md5* md5)
ashleymills 0:e979170e02e7 45 {
ashleymills 0:e979170e02e7 46 /* STM32F2 struct notes:
ashleymills 0:e979170e02e7 47 * md5->buffer = first 4 bytes used to hold partial block if needed
ashleymills 0:e979170e02e7 48 * md5->buffLen = num bytes currently stored in md5->buffer
ashleymills 0:e979170e02e7 49 * md5->loLen = num bytes that have been written to STM32 FIFO
ashleymills 0:e979170e02e7 50 */
ashleymills 0:e979170e02e7 51 XMEMSET(md5->buffer, 0, MD5_REG_SIZE);
ashleymills 0:e979170e02e7 52 md5->buffLen = 0;
ashleymills 0:e979170e02e7 53 md5->loLen = 0;
ashleymills 0:e979170e02e7 54
ashleymills 0:e979170e02e7 55 /* initialize HASH peripheral */
ashleymills 0:e979170e02e7 56 HASH_DeInit();
ashleymills 0:e979170e02e7 57
ashleymills 0:e979170e02e7 58 /* configure algo used, algo mode, datatype */
ashleymills 0:e979170e02e7 59 HASH->CR &= ~ (HASH_CR_ALGO | HASH_CR_DATATYPE | HASH_CR_MODE);
ashleymills 0:e979170e02e7 60 HASH->CR |= (HASH_AlgoSelection_MD5 | HASH_AlgoMode_HASH
ashleymills 0:e979170e02e7 61 | HASH_DataType_8b);
ashleymills 0:e979170e02e7 62
ashleymills 0:e979170e02e7 63 /* reset HASH processor */
ashleymills 0:e979170e02e7 64 HASH->CR |= HASH_CR_INIT;
ashleymills 0:e979170e02e7 65 }
ashleymills 0:e979170e02e7 66
ashleymills 0:e979170e02e7 67 void Md5Update(Md5* md5, const byte* data, word32 len)
ashleymills 0:e979170e02e7 68 {
ashleymills 0:e979170e02e7 69 word32 i = 0;
ashleymills 0:e979170e02e7 70 word32 fill = 0;
ashleymills 0:e979170e02e7 71 word32 diff = 0;
ashleymills 0:e979170e02e7 72
ashleymills 0:e979170e02e7 73 /* if saved partial block is available */
ashleymills 0:e979170e02e7 74 if (md5->buffLen > 0) {
ashleymills 0:e979170e02e7 75 fill = 4 - md5->buffLen;
ashleymills 0:e979170e02e7 76
ashleymills 0:e979170e02e7 77 /* if enough data to fill, fill and push to FIFO */
ashleymills 0:e979170e02e7 78 if (fill <= len) {
ashleymills 0:e979170e02e7 79 XMEMCPY((byte*)md5->buffer + md5->buffLen, data, fill);
ashleymills 0:e979170e02e7 80 HASH_DataIn(*(uint32_t*)md5->buffer);
ashleymills 0:e979170e02e7 81
ashleymills 0:e979170e02e7 82 data += fill;
ashleymills 0:e979170e02e7 83 len -= fill;
ashleymills 0:e979170e02e7 84 md5->loLen += 4;
ashleymills 0:e979170e02e7 85 md5->buffLen = 0;
ashleymills 0:e979170e02e7 86 } else {
ashleymills 0:e979170e02e7 87 /* append partial to existing stored block */
ashleymills 0:e979170e02e7 88 XMEMCPY((byte*)md5->buffer + md5->buffLen, data, len);
ashleymills 0:e979170e02e7 89 md5->buffLen += len;
ashleymills 0:e979170e02e7 90 return;
ashleymills 0:e979170e02e7 91 }
ashleymills 0:e979170e02e7 92 }
ashleymills 0:e979170e02e7 93
ashleymills 0:e979170e02e7 94 /* write input block in the IN FIFO */
ashleymills 0:e979170e02e7 95 for (i = 0; i < len; i += 4)
ashleymills 0:e979170e02e7 96 {
ashleymills 0:e979170e02e7 97 diff = len - i;
ashleymills 0:e979170e02e7 98 if (diff < 4) {
ashleymills 0:e979170e02e7 99 /* store incomplete last block, not yet in FIFO */
ashleymills 0:e979170e02e7 100 XMEMSET(md5->buffer, 0, MD5_REG_SIZE);
ashleymills 0:e979170e02e7 101 XMEMCPY((byte*)md5->buffer, data, diff);
ashleymills 0:e979170e02e7 102 md5->buffLen = diff;
ashleymills 0:e979170e02e7 103 } else {
ashleymills 0:e979170e02e7 104 HASH_DataIn(*(uint32_t*)data);
ashleymills 0:e979170e02e7 105 data+=4;
ashleymills 0:e979170e02e7 106 }
ashleymills 0:e979170e02e7 107 }
ashleymills 0:e979170e02e7 108
ashleymills 0:e979170e02e7 109 /* keep track of total data length thus far */
ashleymills 0:e979170e02e7 110 md5->loLen += (len - md5->buffLen);
ashleymills 0:e979170e02e7 111 }
ashleymills 0:e979170e02e7 112
ashleymills 0:e979170e02e7 113 void Md5Final(Md5* md5, byte* hash)
ashleymills 0:e979170e02e7 114 {
ashleymills 0:e979170e02e7 115 __IO uint16_t nbvalidbitsdata = 0;
ashleymills 0:e979170e02e7 116
ashleymills 0:e979170e02e7 117 /* finish reading any trailing bytes into FIFO */
ashleymills 0:e979170e02e7 118 if (md5->buffLen > 0) {
ashleymills 0:e979170e02e7 119 HASH_DataIn(*(uint32_t*)md5->buffer);
ashleymills 0:e979170e02e7 120 md5->loLen += md5->buffLen;
ashleymills 0:e979170e02e7 121 }
ashleymills 0:e979170e02e7 122
ashleymills 0:e979170e02e7 123 /* calculate number of valid bits in last word of input data */
ashleymills 0:e979170e02e7 124 nbvalidbitsdata = 8 * (md5->loLen % MD5_REG_SIZE);
ashleymills 0:e979170e02e7 125
ashleymills 0:e979170e02e7 126 /* configure number of valid bits in last word of the data */
ashleymills 0:e979170e02e7 127 HASH_SetLastWordValidBitsNbr(nbvalidbitsdata);
ashleymills 0:e979170e02e7 128
ashleymills 0:e979170e02e7 129 /* start HASH processor */
ashleymills 0:e979170e02e7 130 HASH_StartDigest();
ashleymills 0:e979170e02e7 131
ashleymills 0:e979170e02e7 132 /* wait until Busy flag == RESET */
ashleymills 0:e979170e02e7 133 while (HASH_GetFlagStatus(HASH_FLAG_BUSY) != RESET) {}
ashleymills 0:e979170e02e7 134
ashleymills 0:e979170e02e7 135 /* read message digest */
ashleymills 0:e979170e02e7 136 md5->digest[0] = HASH->HR[0];
ashleymills 0:e979170e02e7 137 md5->digest[1] = HASH->HR[1];
ashleymills 0:e979170e02e7 138 md5->digest[2] = HASH->HR[2];
ashleymills 0:e979170e02e7 139 md5->digest[3] = HASH->HR[3];
ashleymills 0:e979170e02e7 140
ashleymills 0:e979170e02e7 141 ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE);
ashleymills 0:e979170e02e7 142
ashleymills 0:e979170e02e7 143 XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE);
ashleymills 0:e979170e02e7 144
ashleymills 0:e979170e02e7 145 InitMd5(md5); /* reset state */
ashleymills 0:e979170e02e7 146 }
ashleymills 0:e979170e02e7 147
ashleymills 0:e979170e02e7 148 #else /* CTaoCrypt software implementation */
ashleymills 0:e979170e02e7 149
ashleymills 0:e979170e02e7 150 #ifndef min
ashleymills 0:e979170e02e7 151
ashleymills 0:e979170e02e7 152 static INLINE word32 min(word32 a, word32 b)
ashleymills 0:e979170e02e7 153 {
ashleymills 0:e979170e02e7 154 return a > b ? b : a;
ashleymills 0:e979170e02e7 155 }
ashleymills 0:e979170e02e7 156
ashleymills 0:e979170e02e7 157 #endif /* min */
ashleymills 0:e979170e02e7 158
ashleymills 0:e979170e02e7 159
ashleymills 0:e979170e02e7 160 void InitMd5(Md5* md5)
ashleymills 0:e979170e02e7 161 {
ashleymills 0:e979170e02e7 162 md5->digest[0] = 0x67452301L;
ashleymills 0:e979170e02e7 163 md5->digest[1] = 0xefcdab89L;
ashleymills 0:e979170e02e7 164 md5->digest[2] = 0x98badcfeL;
ashleymills 0:e979170e02e7 165 md5->digest[3] = 0x10325476L;
ashleymills 0:e979170e02e7 166
ashleymills 0:e979170e02e7 167 md5->buffLen = 0;
ashleymills 0:e979170e02e7 168 md5->loLen = 0;
ashleymills 0:e979170e02e7 169 md5->hiLen = 0;
ashleymills 0:e979170e02e7 170 }
ashleymills 0:e979170e02e7 171
ashleymills 0:e979170e02e7 172
ashleymills 0:e979170e02e7 173 static void Transform(Md5* md5)
ashleymills 0:e979170e02e7 174 {
ashleymills 0:e979170e02e7 175 #define F1(x, y, z) (z ^ (x & (y ^ z)))
ashleymills 0:e979170e02e7 176 #define F2(x, y, z) F1(z, x, y)
ashleymills 0:e979170e02e7 177 #define F3(x, y, z) (x ^ y ^ z)
ashleymills 0:e979170e02e7 178 #define F4(x, y, z) (y ^ (x | ~z))
ashleymills 0:e979170e02e7 179
ashleymills 0:e979170e02e7 180 #define MD5STEP(f, w, x, y, z, data, s) \
ashleymills 0:e979170e02e7 181 w = rotlFixed(w + f(x, y, z) + data, s) + x
ashleymills 0:e979170e02e7 182
ashleymills 0:e979170e02e7 183 /* Copy context->state[] to working vars */
ashleymills 0:e979170e02e7 184 word32 a = md5->digest[0];
ashleymills 0:e979170e02e7 185 word32 b = md5->digest[1];
ashleymills 0:e979170e02e7 186 word32 c = md5->digest[2];
ashleymills 0:e979170e02e7 187 word32 d = md5->digest[3];
ashleymills 0:e979170e02e7 188
ashleymills 0:e979170e02e7 189 MD5STEP(F1, a, b, c, d, md5->buffer[0] + 0xd76aa478, 7);
ashleymills 0:e979170e02e7 190 MD5STEP(F1, d, a, b, c, md5->buffer[1] + 0xe8c7b756, 12);
ashleymills 0:e979170e02e7 191 MD5STEP(F1, c, d, a, b, md5->buffer[2] + 0x242070db, 17);
ashleymills 0:e979170e02e7 192 MD5STEP(F1, b, c, d, a, md5->buffer[3] + 0xc1bdceee, 22);
ashleymills 0:e979170e02e7 193 MD5STEP(F1, a, b, c, d, md5->buffer[4] + 0xf57c0faf, 7);
ashleymills 0:e979170e02e7 194 MD5STEP(F1, d, a, b, c, md5->buffer[5] + 0x4787c62a, 12);
ashleymills 0:e979170e02e7 195 MD5STEP(F1, c, d, a, b, md5->buffer[6] + 0xa8304613, 17);
ashleymills 0:e979170e02e7 196 MD5STEP(F1, b, c, d, a, md5->buffer[7] + 0xfd469501, 22);
ashleymills 0:e979170e02e7 197 MD5STEP(F1, a, b, c, d, md5->buffer[8] + 0x698098d8, 7);
ashleymills 0:e979170e02e7 198 MD5STEP(F1, d, a, b, c, md5->buffer[9] + 0x8b44f7af, 12);
ashleymills 0:e979170e02e7 199 MD5STEP(F1, c, d, a, b, md5->buffer[10] + 0xffff5bb1, 17);
ashleymills 0:e979170e02e7 200 MD5STEP(F1, b, c, d, a, md5->buffer[11] + 0x895cd7be, 22);
ashleymills 0:e979170e02e7 201 MD5STEP(F1, a, b, c, d, md5->buffer[12] + 0x6b901122, 7);
ashleymills 0:e979170e02e7 202 MD5STEP(F1, d, a, b, c, md5->buffer[13] + 0xfd987193, 12);
ashleymills 0:e979170e02e7 203 MD5STEP(F1, c, d, a, b, md5->buffer[14] + 0xa679438e, 17);
ashleymills 0:e979170e02e7 204 MD5STEP(F1, b, c, d, a, md5->buffer[15] + 0x49b40821, 22);
ashleymills 0:e979170e02e7 205
ashleymills 0:e979170e02e7 206 MD5STEP(F2, a, b, c, d, md5->buffer[1] + 0xf61e2562, 5);
ashleymills 0:e979170e02e7 207 MD5STEP(F2, d, a, b, c, md5->buffer[6] + 0xc040b340, 9);
ashleymills 0:e979170e02e7 208 MD5STEP(F2, c, d, a, b, md5->buffer[11] + 0x265e5a51, 14);
ashleymills 0:e979170e02e7 209 MD5STEP(F2, b, c, d, a, md5->buffer[0] + 0xe9b6c7aa, 20);
ashleymills 0:e979170e02e7 210 MD5STEP(F2, a, b, c, d, md5->buffer[5] + 0xd62f105d, 5);
ashleymills 0:e979170e02e7 211 MD5STEP(F2, d, a, b, c, md5->buffer[10] + 0x02441453, 9);
ashleymills 0:e979170e02e7 212 MD5STEP(F2, c, d, a, b, md5->buffer[15] + 0xd8a1e681, 14);
ashleymills 0:e979170e02e7 213 MD5STEP(F2, b, c, d, a, md5->buffer[4] + 0xe7d3fbc8, 20);
ashleymills 0:e979170e02e7 214 MD5STEP(F2, a, b, c, d, md5->buffer[9] + 0x21e1cde6, 5);
ashleymills 0:e979170e02e7 215 MD5STEP(F2, d, a, b, c, md5->buffer[14] + 0xc33707d6, 9);
ashleymills 0:e979170e02e7 216 MD5STEP(F2, c, d, a, b, md5->buffer[3] + 0xf4d50d87, 14);
ashleymills 0:e979170e02e7 217 MD5STEP(F2, b, c, d, a, md5->buffer[8] + 0x455a14ed, 20);
ashleymills 0:e979170e02e7 218 MD5STEP(F2, a, b, c, d, md5->buffer[13] + 0xa9e3e905, 5);
ashleymills 0:e979170e02e7 219 MD5STEP(F2, d, a, b, c, md5->buffer[2] + 0xfcefa3f8, 9);
ashleymills 0:e979170e02e7 220 MD5STEP(F2, c, d, a, b, md5->buffer[7] + 0x676f02d9, 14);
ashleymills 0:e979170e02e7 221 MD5STEP(F2, b, c, d, a, md5->buffer[12] + 0x8d2a4c8a, 20);
ashleymills 0:e979170e02e7 222
ashleymills 0:e979170e02e7 223 MD5STEP(F3, a, b, c, d, md5->buffer[5] + 0xfffa3942, 4);
ashleymills 0:e979170e02e7 224 MD5STEP(F3, d, a, b, c, md5->buffer[8] + 0x8771f681, 11);
ashleymills 0:e979170e02e7 225 MD5STEP(F3, c, d, a, b, md5->buffer[11] + 0x6d9d6122, 16);
ashleymills 0:e979170e02e7 226 MD5STEP(F3, b, c, d, a, md5->buffer[14] + 0xfde5380c, 23);
ashleymills 0:e979170e02e7 227 MD5STEP(F3, a, b, c, d, md5->buffer[1] + 0xa4beea44, 4);
ashleymills 0:e979170e02e7 228 MD5STEP(F3, d, a, b, c, md5->buffer[4] + 0x4bdecfa9, 11);
ashleymills 0:e979170e02e7 229 MD5STEP(F3, c, d, a, b, md5->buffer[7] + 0xf6bb4b60, 16);
ashleymills 0:e979170e02e7 230 MD5STEP(F3, b, c, d, a, md5->buffer[10] + 0xbebfbc70, 23);
ashleymills 0:e979170e02e7 231 MD5STEP(F3, a, b, c, d, md5->buffer[13] + 0x289b7ec6, 4);
ashleymills 0:e979170e02e7 232 MD5STEP(F3, d, a, b, c, md5->buffer[0] + 0xeaa127fa, 11);
ashleymills 0:e979170e02e7 233 MD5STEP(F3, c, d, a, b, md5->buffer[3] + 0xd4ef3085, 16);
ashleymills 0:e979170e02e7 234 MD5STEP(F3, b, c, d, a, md5->buffer[6] + 0x04881d05, 23);
ashleymills 0:e979170e02e7 235 MD5STEP(F3, a, b, c, d, md5->buffer[9] + 0xd9d4d039, 4);
ashleymills 0:e979170e02e7 236 MD5STEP(F3, d, a, b, c, md5->buffer[12] + 0xe6db99e5, 11);
ashleymills 0:e979170e02e7 237 MD5STEP(F3, c, d, a, b, md5->buffer[15] + 0x1fa27cf8, 16);
ashleymills 0:e979170e02e7 238 MD5STEP(F3, b, c, d, a, md5->buffer[2] + 0xc4ac5665, 23);
ashleymills 0:e979170e02e7 239
ashleymills 0:e979170e02e7 240 MD5STEP(F4, a, b, c, d, md5->buffer[0] + 0xf4292244, 6);
ashleymills 0:e979170e02e7 241 MD5STEP(F4, d, a, b, c, md5->buffer[7] + 0x432aff97, 10);
ashleymills 0:e979170e02e7 242 MD5STEP(F4, c, d, a, b, md5->buffer[14] + 0xab9423a7, 15);
ashleymills 0:e979170e02e7 243 MD5STEP(F4, b, c, d, a, md5->buffer[5] + 0xfc93a039, 21);
ashleymills 0:e979170e02e7 244 MD5STEP(F4, a, b, c, d, md5->buffer[12] + 0x655b59c3, 6);
ashleymills 0:e979170e02e7 245 MD5STEP(F4, d, a, b, c, md5->buffer[3] + 0x8f0ccc92, 10);
ashleymills 0:e979170e02e7 246 MD5STEP(F4, c, d, a, b, md5->buffer[10] + 0xffeff47d, 15);
ashleymills 0:e979170e02e7 247 MD5STEP(F4, b, c, d, a, md5->buffer[1] + 0x85845dd1, 21);
ashleymills 0:e979170e02e7 248 MD5STEP(F4, a, b, c, d, md5->buffer[8] + 0x6fa87e4f, 6);
ashleymills 0:e979170e02e7 249 MD5STEP(F4, d, a, b, c, md5->buffer[15] + 0xfe2ce6e0, 10);
ashleymills 0:e979170e02e7 250 MD5STEP(F4, c, d, a, b, md5->buffer[6] + 0xa3014314, 15);
ashleymills 0:e979170e02e7 251 MD5STEP(F4, b, c, d, a, md5->buffer[13] + 0x4e0811a1, 21);
ashleymills 0:e979170e02e7 252 MD5STEP(F4, a, b, c, d, md5->buffer[4] + 0xf7537e82, 6);
ashleymills 0:e979170e02e7 253 MD5STEP(F4, d, a, b, c, md5->buffer[11] + 0xbd3af235, 10);
ashleymills 0:e979170e02e7 254 MD5STEP(F4, c, d, a, b, md5->buffer[2] + 0x2ad7d2bb, 15);
ashleymills 0:e979170e02e7 255 MD5STEP(F4, b, c, d, a, md5->buffer[9] + 0xeb86d391, 21);
ashleymills 0:e979170e02e7 256
ashleymills 0:e979170e02e7 257 /* Add the working vars back into digest state[] */
ashleymills 0:e979170e02e7 258 md5->digest[0] += a;
ashleymills 0:e979170e02e7 259 md5->digest[1] += b;
ashleymills 0:e979170e02e7 260 md5->digest[2] += c;
ashleymills 0:e979170e02e7 261 md5->digest[3] += d;
ashleymills 0:e979170e02e7 262 }
ashleymills 0:e979170e02e7 263
ashleymills 0:e979170e02e7 264
ashleymills 0:e979170e02e7 265 static INLINE void AddLength(Md5* md5, word32 len)
ashleymills 0:e979170e02e7 266 {
ashleymills 0:e979170e02e7 267 word32 tmp = md5->loLen;
ashleymills 0:e979170e02e7 268 if ( (md5->loLen += len) < tmp)
ashleymills 0:e979170e02e7 269 md5->hiLen++; /* carry low to high */
ashleymills 0:e979170e02e7 270 }
ashleymills 0:e979170e02e7 271
ashleymills 0:e979170e02e7 272
ashleymills 0:e979170e02e7 273 void Md5Update(Md5* md5, const byte* data, word32 len)
ashleymills 0:e979170e02e7 274 {
ashleymills 0:e979170e02e7 275 /* do block size increments */
ashleymills 0:e979170e02e7 276 byte* local = (byte*)md5->buffer;
ashleymills 0:e979170e02e7 277
ashleymills 0:e979170e02e7 278 while (len) {
ashleymills 0:e979170e02e7 279 word32 add = min(len, MD5_BLOCK_SIZE - md5->buffLen);
ashleymills 0:e979170e02e7 280 XMEMCPY(&local[md5->buffLen], data, add);
ashleymills 0:e979170e02e7 281
ashleymills 0:e979170e02e7 282 md5->buffLen += add;
ashleymills 0:e979170e02e7 283 data += add;
ashleymills 0:e979170e02e7 284 len -= add;
ashleymills 0:e979170e02e7 285
ashleymills 0:e979170e02e7 286 if (md5->buffLen == MD5_BLOCK_SIZE) {
ashleymills 0:e979170e02e7 287 #ifdef BIG_ENDIAN_ORDER
ashleymills 0:e979170e02e7 288 ByteReverseBytes(local, local, MD5_BLOCK_SIZE);
ashleymills 0:e979170e02e7 289 #endif
ashleymills 0:e979170e02e7 290 Transform(md5);
ashleymills 0:e979170e02e7 291 AddLength(md5, MD5_BLOCK_SIZE);
ashleymills 0:e979170e02e7 292 md5->buffLen = 0;
ashleymills 0:e979170e02e7 293 }
ashleymills 0:e979170e02e7 294 }
ashleymills 0:e979170e02e7 295 }
ashleymills 0:e979170e02e7 296
ashleymills 0:e979170e02e7 297
ashleymills 0:e979170e02e7 298 void Md5Final(Md5* md5, byte* hash)
ashleymills 0:e979170e02e7 299 {
ashleymills 0:e979170e02e7 300 byte* local = (byte*)md5->buffer;
ashleymills 0:e979170e02e7 301
ashleymills 0:e979170e02e7 302 AddLength(md5, md5->buffLen); /* before adding pads */
ashleymills 0:e979170e02e7 303
ashleymills 0:e979170e02e7 304 local[md5->buffLen++] = 0x80; /* add 1 */
ashleymills 0:e979170e02e7 305
ashleymills 0:e979170e02e7 306 /* pad with zeros */
ashleymills 0:e979170e02e7 307 if (md5->buffLen > MD5_PAD_SIZE) {
ashleymills 0:e979170e02e7 308 XMEMSET(&local[md5->buffLen], 0, MD5_BLOCK_SIZE - md5->buffLen);
ashleymills 0:e979170e02e7 309 md5->buffLen += MD5_BLOCK_SIZE - md5->buffLen;
ashleymills 0:e979170e02e7 310
ashleymills 0:e979170e02e7 311 #ifdef BIG_ENDIAN_ORDER
ashleymills 0:e979170e02e7 312 ByteReverseBytes(local, local, MD5_BLOCK_SIZE);
ashleymills 0:e979170e02e7 313 #endif
ashleymills 0:e979170e02e7 314 Transform(md5);
ashleymills 0:e979170e02e7 315 md5->buffLen = 0;
ashleymills 0:e979170e02e7 316 }
ashleymills 0:e979170e02e7 317 XMEMSET(&local[md5->buffLen], 0, MD5_PAD_SIZE - md5->buffLen);
ashleymills 0:e979170e02e7 318
ashleymills 0:e979170e02e7 319 /* put lengths in bits */
ashleymills 0:e979170e02e7 320 md5->hiLen = (md5->loLen >> (8*sizeof(md5->loLen) - 3)) +
ashleymills 0:e979170e02e7 321 (md5->hiLen << 3);
ashleymills 0:e979170e02e7 322 md5->loLen = md5->loLen << 3;
ashleymills 0:e979170e02e7 323
ashleymills 0:e979170e02e7 324 /* store lengths */
ashleymills 0:e979170e02e7 325 #ifdef BIG_ENDIAN_ORDER
ashleymills 0:e979170e02e7 326 ByteReverseBytes(local, local, MD5_BLOCK_SIZE);
ashleymills 0:e979170e02e7 327 #endif
ashleymills 0:e979170e02e7 328 /* ! length ordering dependent on digest endian type ! */
ashleymills 0:e979170e02e7 329 XMEMCPY(&local[MD5_PAD_SIZE], &md5->loLen, sizeof(word32));
ashleymills 0:e979170e02e7 330 XMEMCPY(&local[MD5_PAD_SIZE + sizeof(word32)], &md5->hiLen, sizeof(word32));
ashleymills 0:e979170e02e7 331
ashleymills 0:e979170e02e7 332 Transform(md5);
ashleymills 0:e979170e02e7 333 #ifdef BIG_ENDIAN_ORDER
ashleymills 0:e979170e02e7 334 ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE);
ashleymills 0:e979170e02e7 335 #endif
ashleymills 0:e979170e02e7 336 XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE);
ashleymills 0:e979170e02e7 337
ashleymills 0:e979170e02e7 338 InitMd5(md5); /* reset state */
ashleymills 0:e979170e02e7 339 }
ashleymills 0:e979170e02e7 340
ashleymills 0:e979170e02e7 341 #endif /* STM32F2_CRYPTO */
ashleymills 0:e979170e02e7 342