1 #include "first.h" 2 3 #include "sys-crypto-md.h" 4 #ifndef USE_LIB_CRYPTO_MD5 5 6 /* MD5C.C - RSA Data Security, Inc., MD5 message-digest algorithm 7 */ 8 9 /* Copyright (C) 1991-2, RSA Data Security, Inc. Created 1991. All 10 rights reserved. 11 12 License to copy and use this software is granted provided that it 13 is identified as the "RSA Data Security, Inc. MD5 Message-Digest 14 Algorithm" in all material mentioning or referencing this software 15 or this function. 16 17 License is also granted to make and use derivative works provided 18 that such works are identified as "derived from the RSA Data 19 Security, Inc. MD5 Message-Digest Algorithm" in all material 20 mentioning or referencing the derived work. 21 22 RSA Data Security, Inc. makes no representations concerning either 23 the merchantability of this software or the suitability of this 24 software for any particular purpose. It is provided "as is" 25 without express or implied warranty of any kind. 26 27 These notices must be retained in any copies of any part of this 28 documentation and/or software. 29 */ 30 31 32 #include "algo_md5.h" 33 34 #define UINT4 uint32_t 35 #define UINT2 uint16_t 36 #define POINTER unsigned char * 37 38 #include <string.h> 39 40 /* Constants for MD5Transform routine. 41 */ 42 43 #define S11 7 44 #define S12 12 45 #define S13 17 46 #define S14 22 47 #define S21 5 48 #define S22 9 49 #define S23 14 50 #define S24 20 51 #define S31 4 52 #define S32 11 53 #define S33 16 54 #define S34 23 55 #define S41 6 56 #define S42 10 57 #define S43 15 58 #define S44 21 59 60 static void li_MD5Transform (UINT4 [4], const unsigned char [64]); 61 static void Encode (unsigned char *, UINT4 *, unsigned int); 62 static void Decode (UINT4 *, const unsigned char *, unsigned int); 63 64 #ifdef HAVE_MEMCPY 65 #define MD5_memcpy(output, input, len) memcpy((output), (input), (len)) 66 #else 67 static void MD5_memcpy (POINTER, POINTER, unsigned int); 68 #endif 69 #ifdef HAVE_MEMSET 70 #define MD5_memset(output, value, len) memset((output), (value), (len)) 71 #else 72 static void MD5_memset (POINTER, int, unsigned int); 73 #endif 74 75 static unsigned char PADDING[64] = { 76 0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 77 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 78 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 79 }; 80 81 /* F, G, H and I are basic MD5 functions. 82 */ 83 #define F(x, y, z) (((x) & (y)) | ((~x) & (z))) 84 #define G(x, y, z) (((x) & (z)) | ((y) & (~z))) 85 #define H(x, y, z) ((x) ^ (y) ^ (z)) 86 #define I(x, y, z) ((y) ^ ((x) | (~z))) 87 88 /* ROTATE_LEFT rotates x left n bits. 89 */ 90 #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n)))) 91 92 /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4. 93 Rotation is separate from addition to prevent recomputation. 94 */ 95 #define FF(a, b, c, d, x, s, ac) { \ 96 (a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \ 97 (a) = ROTATE_LEFT ((a), (s)); \ 98 (a) += (b); \ 99 } 100 #define GG(a, b, c, d, x, s, ac) { \ 101 (a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \ 102 (a) = ROTATE_LEFT ((a), (s)); \ 103 (a) += (b); \ 104 } 105 #define HH(a, b, c, d, x, s, ac) { \ 106 (a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \ 107 (a) = ROTATE_LEFT ((a), (s)); \ 108 (a) += (b); \ 109 } 110 #define II(a, b, c, d, x, s, ac) { \ 111 (a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \ 112 (a) = ROTATE_LEFT ((a), (s)); \ 113 (a) += (b); \ 114 } 115 116 /* MD5 initialization. Begins an MD5 operation, writing a new context. 117 */ 118 void li_MD5_Init (li_MD5_CTX *context) 119 { 120 context->count[0] = context->count[1] = 0; 121 /* Load magic initialization constants. 122 */ 123 context->state[0] = 0x67452301; 124 context->state[1] = 0xefcdab89; 125 context->state[2] = 0x98badcfe; 126 context->state[3] = 0x10325476; 127 } 128 129 /* MD5 block update operation. Continues an MD5 message-digest 130 operation, processing another message block, and updating the 131 context. 132 */ 133 void li_MD5_Update (li_MD5_CTX *context, const void *_input, unsigned int inputLen) 134 { 135 unsigned int i, ndx, partLen; 136 const unsigned char *input = (const unsigned char*) _input; 137 138 /* Compute number of bytes mod 64 */ 139 ndx = (unsigned int)((context->count[0] >> 3) & 0x3F); 140 141 /* Update number of bits */ 142 if ((context->count[0] += ((UINT4)inputLen << 3)) 143 144 < ((UINT4)inputLen << 3)) 145 context->count[1]++; 146 context->count[1] += ((UINT4)inputLen >> 29); 147 148 partLen = 64 - ndx; 149 150 /* Transform as many times as possible. 151 */ 152 if (inputLen >= partLen) { 153 MD5_memcpy 154 ((POINTER)&context->buffer[ndx], (POINTER)input, partLen); 155 li_MD5Transform (context->state, context->buffer); 156 157 for (i = partLen; i + 63 < inputLen; i += 64) 158 li_MD5Transform (context->state, &input[i]); 159 160 ndx = 0; 161 } 162 else 163 i = 0; 164 165 /* Buffer remaining input */ 166 MD5_memcpy 167 ((POINTER)&context->buffer[ndx], (POINTER)&input[i], 168 inputLen-i); 169 } 170 171 /* MD5 finalization. Ends an MD5 message-digest operation, writing the 172 the message digest and zeroizing the context. 173 */ 174 void li_MD5_Final (unsigned char digest[16], li_MD5_CTX *context) 175 { 176 unsigned char bits[8]; 177 unsigned int ndx, padLen; 178 179 /* Save number of bits */ 180 Encode (bits, context->count, 8); 181 182 /* Pad out to 56 mod 64. 183 */ 184 ndx = (unsigned int)((context->count[0] >> 3) & 0x3f); 185 padLen = (ndx < 56) ? (56 - ndx) : (120 - ndx); 186 li_MD5_Update (context, PADDING, padLen); 187 188 /* Append length (before padding) */ 189 li_MD5_Update (context, bits, 8); 190 191 /* Store state in digest */ 192 Encode (digest, context->state, 16); 193 194 /* Zeroize sensitive information. 195 */ 196 MD5_memset ((POINTER)context, 0, sizeof (*context)); 197 } 198 199 /* MD5 basic transformation. Transforms state based on block. 200 */ 201 static void li_MD5Transform (UINT4 state[4], const unsigned char block[64]) 202 { 203 UINT4 a = state[0], b = state[1], c = state[2], d = state[3], x[16]; 204 205 Decode (x, block, 64); 206 207 /* Round 1 */ 208 FF (a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */ 209 FF (d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */ 210 FF (c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */ 211 FF (b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */ 212 FF (a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */ 213 FF (d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */ 214 FF (c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */ 215 FF (b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */ 216 FF (a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */ 217 FF (d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */ 218 FF (c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */ 219 FF (b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */ 220 FF (a, b, c, d, x[12], S11, 0x6b901122); /* 13 */ 221 FF (d, a, b, c, x[13], S12, 0xfd987193); /* 14 */ 222 FF (c, d, a, b, x[14], S13, 0xa679438e); /* 15 */ 223 FF (b, c, d, a, x[15], S14, 0x49b40821); /* 16 */ 224 225 /* Round 2 */ 226 GG (a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */ 227 GG (d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */ 228 GG (c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */ 229 GG (b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */ 230 GG (a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */ 231 GG (d, a, b, c, x[10], S22, 0x2441453); /* 22 */ 232 GG (c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */ 233 GG (b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */ 234 GG (a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */ 235 GG (d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */ 236 GG (c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */ 237 238 GG (b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */ 239 GG (a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */ 240 GG (d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */ 241 GG (c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */ 242 GG (b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */ 243 244 /* Round 3 */ 245 HH (a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */ 246 HH (d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */ 247 HH (c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */ 248 HH (b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */ 249 HH (a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */ 250 HH (d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */ 251 HH (c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */ 252 HH (b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */ 253 HH (a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */ 254 HH (d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */ 255 HH (c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */ 256 HH (b, c, d, a, x[ 6], S34, 0x4881d05); /* 44 */ 257 HH (a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */ 258 HH (d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */ 259 HH (c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */ 260 HH (b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */ 261 262 /* Round 4 */ 263 II (a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */ 264 II (d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */ 265 II (c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */ 266 II (b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */ 267 II (a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */ 268 II (d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */ 269 II (c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */ 270 II (b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */ 271 II (a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */ 272 II (d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */ 273 II (c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */ 274 II (b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */ 275 II (a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */ 276 II (d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */ 277 II (c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */ 278 II (b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */ 279 280 state[0] += a; 281 state[1] += b; 282 state[2] += c; 283 state[3] += d; 284 285 /* Zeroize sensitive information. 286 287 */ 288 MD5_memset ((POINTER)x, 0, sizeof (x)); 289 } 290 291 /* Encodes input (UINT4) into output (unsigned char). Assumes len is 292 a multiple of 4. 293 */ 294 static void Encode (unsigned char *output, UINT4 *input, unsigned int len) 295 { 296 unsigned int i, j; 297 298 for (i = 0, j = 0; j < len; i++, j += 4) { 299 output[j] = (unsigned char)(input[i] & 0xff); 300 output[j+1] = (unsigned char)((input[i] >> 8) & 0xff); 301 output[j+2] = (unsigned char)((input[i] >> 16) & 0xff); 302 output[j+3] = (unsigned char)((input[i] >> 24) & 0xff); 303 } 304 } 305 306 /* Decodes input (unsigned char) into output (UINT4). Assumes len is 307 a multiple of 4. 308 */ 309 static void Decode (UINT4 *output, const unsigned char *input, unsigned int len) 310 { 311 unsigned int i, j; 312 313 for (i = 0, j = 0; j < len; i++, j += 4) 314 output[i] = ((UINT4)input[j]) | (((UINT4)input[j+1]) << 8) | 315 (((UINT4)input[j+2]) << 16) | (((UINT4)input[j+3]) << 24); 316 } 317 318 /* Note: Replace "for loop" with standard memcpy if possible. 319 */ 320 #ifndef HAVE_MEMCPY 321 static void MD5_memcpy (POINTER output, POINTER input, unsigned int len) 322 { 323 unsigned int i; 324 325 for (i = 0; i < len; i++) 326 327 output[i] = input[i]; 328 } 329 #endif 330 /* Note: Replace "for loop" with standard memset if possible. 331 */ 332 #ifndef HAVE_MEMSET 333 static void MD5_memset (POINTER output, int value, unsigned int len) 334 { 335 unsigned int i; 336 337 for (i = 0; i < len; i++) 338 ((char *)output)[i] = (char)value; 339 } 340 #endif 341 342 #endif 343