CyaSSL is an SSL library for devices like mbed.
Dependents: cyassl-client Sync
md5.c
00001 /* md5.c 00002 * 00003 * Copyright (C) 2006-2009 Sawtooth Consulting Ltd. 00004 * 00005 * This file is part of CyaSSL. 00006 * 00007 * CyaSSL is free software; you can redistribute it and/or modify 00008 * it under the terms of the GNU General Public License as published by 00009 * the Free Software Foundation; either version 2 of the License, or 00010 * (at your option) any later version. 00011 * 00012 * CyaSSL is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with this program; if not, write to the Free Software 00019 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 00020 */ 00021 00022 00023 #include "ctc_md5.h" 00024 #ifdef NO_INLINE 00025 #include "misc.h" 00026 #else 00027 #include "misc.c" 00028 #endif 00029 00030 00031 00032 #ifndef min 00033 00034 static INLINE word32 min(word32 a, word32 b) 00035 { 00036 return a > b ? b : a; 00037 } 00038 00039 #endif /* min */ 00040 00041 00042 void InitMd5(Md5* md5) 00043 { 00044 md5->digest[0] = 0x67452301L; 00045 md5->digest[1] = 0xefcdab89L; 00046 md5->digest[2] = 0x98badcfeL; 00047 md5->digest[3] = 0x10325476L; 00048 00049 md5->buffLen = 0; 00050 md5->loLen = 0; 00051 md5->hiLen = 0; 00052 } 00053 00054 00055 static void Transform(Md5* md5) 00056 { 00057 #define F1(x, y, z) (z ^ (x & (y ^ z))) 00058 #define F2(x, y, z) F1(z, x, y) 00059 #define F3(x, y, z) (x ^ y ^ z) 00060 #define F4(x, y, z) (y ^ (x | ~z)) 00061 00062 #define MD5STEP(f, w, x, y, z, data, s) \ 00063 w = rotlFixed(w + f(x, y, z) + data, s) + x 00064 00065 /* Copy context->state[] to working vars */ 00066 word32 a = md5->digest[0]; 00067 word32 b = md5->digest[1]; 00068 word32 c = md5->digest[2]; 00069 word32 d = md5->digest[3]; 00070 00071 MD5STEP(F1, a, b, c, d, md5->buffer[0] + 0xd76aa478, 7); 00072 MD5STEP(F1, d, a, b, c, md5->buffer[1] + 0xe8c7b756, 12); 00073 MD5STEP(F1, c, d, a, b, md5->buffer[2] + 0x242070db, 17); 00074 MD5STEP(F1, b, c, d, a, md5->buffer[3] + 0xc1bdceee, 22); 00075 MD5STEP(F1, a, b, c, d, md5->buffer[4] + 0xf57c0faf, 7); 00076 MD5STEP(F1, d, a, b, c, md5->buffer[5] + 0x4787c62a, 12); 00077 MD5STEP(F1, c, d, a, b, md5->buffer[6] + 0xa8304613, 17); 00078 MD5STEP(F1, b, c, d, a, md5->buffer[7] + 0xfd469501, 22); 00079 MD5STEP(F1, a, b, c, d, md5->buffer[8] + 0x698098d8, 7); 00080 MD5STEP(F1, d, a, b, c, md5->buffer[9] + 0x8b44f7af, 12); 00081 MD5STEP(F1, c, d, a, b, md5->buffer[10] + 0xffff5bb1, 17); 00082 MD5STEP(F1, b, c, d, a, md5->buffer[11] + 0x895cd7be, 22); 00083 MD5STEP(F1, a, b, c, d, md5->buffer[12] + 0x6b901122, 7); 00084 MD5STEP(F1, d, a, b, c, md5->buffer[13] + 0xfd987193, 12); 00085 MD5STEP(F1, c, d, a, b, md5->buffer[14] + 0xa679438e, 17); 00086 MD5STEP(F1, b, c, d, a, md5->buffer[15] + 0x49b40821, 22); 00087 00088 MD5STEP(F2, a, b, c, d, md5->buffer[1] + 0xf61e2562, 5); 00089 MD5STEP(F2, d, a, b, c, md5->buffer[6] + 0xc040b340, 9); 00090 MD5STEP(F2, c, d, a, b, md5->buffer[11] + 0x265e5a51, 14); 00091 MD5STEP(F2, b, c, d, a, md5->buffer[0] + 0xe9b6c7aa, 20); 00092 MD5STEP(F2, a, b, c, d, md5->buffer[5] + 0xd62f105d, 5); 00093 MD5STEP(F2, d, a, b, c, md5->buffer[10] + 0x02441453, 9); 00094 MD5STEP(F2, c, d, a, b, md5->buffer[15] + 0xd8a1e681, 14); 00095 MD5STEP(F2, b, c, d, a, md5->buffer[4] + 0xe7d3fbc8, 20); 00096 MD5STEP(F2, a, b, c, d, md5->buffer[9] + 0x21e1cde6, 5); 00097 MD5STEP(F2, d, a, b, c, md5->buffer[14] + 0xc33707d6, 9); 00098 MD5STEP(F2, c, d, a, b, md5->buffer[3] + 0xf4d50d87, 14); 00099 MD5STEP(F2, b, c, d, a, md5->buffer[8] + 0x455a14ed, 20); 00100 MD5STEP(F2, a, b, c, d, md5->buffer[13] + 0xa9e3e905, 5); 00101 MD5STEP(F2, d, a, b, c, md5->buffer[2] + 0xfcefa3f8, 9); 00102 MD5STEP(F2, c, d, a, b, md5->buffer[7] + 0x676f02d9, 14); 00103 MD5STEP(F2, b, c, d, a, md5->buffer[12] + 0x8d2a4c8a, 20); 00104 00105 MD5STEP(F3, a, b, c, d, md5->buffer[5] + 0xfffa3942, 4); 00106 MD5STEP(F3, d, a, b, c, md5->buffer[8] + 0x8771f681, 11); 00107 MD5STEP(F3, c, d, a, b, md5->buffer[11] + 0x6d9d6122, 16); 00108 MD5STEP(F3, b, c, d, a, md5->buffer[14] + 0xfde5380c, 23); 00109 MD5STEP(F3, a, b, c, d, md5->buffer[1] + 0xa4beea44, 4); 00110 MD5STEP(F3, d, a, b, c, md5->buffer[4] + 0x4bdecfa9, 11); 00111 MD5STEP(F3, c, d, a, b, md5->buffer[7] + 0xf6bb4b60, 16); 00112 MD5STEP(F3, b, c, d, a, md5->buffer[10] + 0xbebfbc70, 23); 00113 MD5STEP(F3, a, b, c, d, md5->buffer[13] + 0x289b7ec6, 4); 00114 MD5STEP(F3, d, a, b, c, md5->buffer[0] + 0xeaa127fa, 11); 00115 MD5STEP(F3, c, d, a, b, md5->buffer[3] + 0xd4ef3085, 16); 00116 MD5STEP(F3, b, c, d, a, md5->buffer[6] + 0x04881d05, 23); 00117 MD5STEP(F3, a, b, c, d, md5->buffer[9] + 0xd9d4d039, 4); 00118 MD5STEP(F3, d, a, b, c, md5->buffer[12] + 0xe6db99e5, 11); 00119 MD5STEP(F3, c, d, a, b, md5->buffer[15] + 0x1fa27cf8, 16); 00120 MD5STEP(F3, b, c, d, a, md5->buffer[2] + 0xc4ac5665, 23); 00121 00122 MD5STEP(F4, a, b, c, d, md5->buffer[0] + 0xf4292244, 6); 00123 MD5STEP(F4, d, a, b, c, md5->buffer[7] + 0x432aff97, 10); 00124 MD5STEP(F4, c, d, a, b, md5->buffer[14] + 0xab9423a7, 15); 00125 MD5STEP(F4, b, c, d, a, md5->buffer[5] + 0xfc93a039, 21); 00126 MD5STEP(F4, a, b, c, d, md5->buffer[12] + 0x655b59c3, 6); 00127 MD5STEP(F4, d, a, b, c, md5->buffer[3] + 0x8f0ccc92, 10); 00128 MD5STEP(F4, c, d, a, b, md5->buffer[10] + 0xffeff47d, 15); 00129 MD5STEP(F4, b, c, d, a, md5->buffer[1] + 0x85845dd1, 21); 00130 MD5STEP(F4, a, b, c, d, md5->buffer[8] + 0x6fa87e4f, 6); 00131 MD5STEP(F4, d, a, b, c, md5->buffer[15] + 0xfe2ce6e0, 10); 00132 MD5STEP(F4, c, d, a, b, md5->buffer[6] + 0xa3014314, 15); 00133 MD5STEP(F4, b, c, d, a, md5->buffer[13] + 0x4e0811a1, 21); 00134 MD5STEP(F4, a, b, c, d, md5->buffer[4] + 0xf7537e82, 6); 00135 MD5STEP(F4, d, a, b, c, md5->buffer[11] + 0xbd3af235, 10); 00136 MD5STEP(F4, c, d, a, b, md5->buffer[2] + 0x2ad7d2bb, 15); 00137 MD5STEP(F4, b, c, d, a, md5->buffer[9] + 0xeb86d391, 21); 00138 00139 /* Add the working vars back into digest state[] */ 00140 md5->digest[0] += a; 00141 md5->digest[1] += b; 00142 md5->digest[2] += c; 00143 md5->digest[3] += d; 00144 } 00145 00146 00147 static INLINE void AddLength(Md5* md5, word32 len) 00148 { 00149 word32 tmp = md5->loLen; 00150 if ( (md5->loLen += len) < tmp) 00151 md5->hiLen++; /* carry low to high */ 00152 } 00153 00154 00155 void Md5Update(Md5* md5, const byte* data, word32 len) 00156 { 00157 /* do block size increments */ 00158 byte* local = (byte*)md5->buffer; 00159 00160 while (len) { 00161 word32 add = min(len, MD5_BLOCK_SIZE - md5->buffLen); 00162 XMEMCPY(&local[md5->buffLen], data, add); 00163 00164 md5->buffLen += add; 00165 data += add; 00166 len -= add; 00167 00168 if (md5->buffLen == MD5_BLOCK_SIZE) { 00169 #ifdef BIG_ENDIAN_ORDER 00170 ByteReverseBytes(local, local, MD5_BLOCK_SIZE); 00171 #endif 00172 Transform(md5); 00173 AddLength(md5, MD5_BLOCK_SIZE); 00174 md5->buffLen = 0; 00175 } 00176 } 00177 } 00178 00179 00180 void Md5Final(Md5* md5, byte* hash) 00181 { 00182 byte* local = (byte*)md5->buffer; 00183 00184 AddLength(md5, md5->buffLen); /* before adding pads */ 00185 00186 local[md5->buffLen++] = 0x80; /* add 1 */ 00187 00188 /* pad with zeros */ 00189 if (md5->buffLen > MD5_PAD_SIZE) { 00190 XMEMSET(&local[md5->buffLen], 0, MD5_BLOCK_SIZE - md5->buffLen); 00191 md5->buffLen += MD5_BLOCK_SIZE - md5->buffLen; 00192 00193 #ifdef BIG_ENDIAN_ORDER 00194 ByteReverseBytes(local, local, MD5_BLOCK_SIZE); 00195 #endif 00196 Transform(md5); 00197 md5->buffLen = 0; 00198 } 00199 XMEMSET(&local[md5->buffLen], 0, MD5_PAD_SIZE - md5->buffLen); 00200 00201 /* put lengths in bits */ 00202 md5->loLen = md5->loLen << 3; 00203 md5->hiLen = (md5->loLen >> (8*sizeof(md5->loLen) - 3)) + 00204 (md5->hiLen << 3); 00205 00206 /* store lengths */ 00207 #ifdef BIG_ENDIAN_ORDER 00208 ByteReverseBytes(local, local, MD5_BLOCK_SIZE); 00209 #endif 00210 /* ! length ordering dependent on digest endian type ! */ 00211 XMEMCPY(&local[MD5_PAD_SIZE], &md5->loLen, sizeof(word32)); 00212 XMEMCPY(&local[MD5_PAD_SIZE + sizeof(word32)], &md5->hiLen, sizeof(word32)); 00213 00214 Transform(md5); 00215 #ifdef BIG_ENDIAN_ORDER 00216 ByteReverseWords(md5->digest, md5->digest, MD5_DIGEST_SIZE); 00217 #endif 00218 XMEMCPY(hash, md5->digest, MD5_DIGEST_SIZE); 00219 00220 InitMd5(md5); /* reset state */ 00221 } 00222
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