Annotation of embedaddon/freevrrpd/md5.c, revision 1.1
1.1 ! misho 1: /*
! 2: **********************************************************************
! 3: ** md5.c **
! 4: ** RSA Data Security, Inc. MD5 Message Digest Algorithm **
! 5: ** Created: 2/17/90 RLR **
! 6: ** Revised: 1/91 SRD,AJ,BSK,JT Reference C Version **
! 7: **********************************************************************
! 8: */
! 9:
! 10: /*
! 11: **********************************************************************
! 12: ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. **
! 13: ** **
! 14: ** License to copy and use this software is granted provided that **
! 15: ** it is identified as the "RSA Data Security, Inc. MD5 Message **
! 16: ** Digest Algorithm" in all material mentioning or referencing this **
! 17: ** software or this function. **
! 18: ** **
! 19: ** License is also granted to make and use derivative works **
! 20: ** provided that such works are identified as "derived from the RSA **
! 21: ** Data Security, Inc. MD5 Message Digest Algorithm" in all **
! 22: ** material mentioning or referencing the derived work. **
! 23: ** **
! 24: ** RSA Data Security, Inc. makes no representations concerning **
! 25: ** either the merchantability of this software or the suitability **
! 26: ** of this software for any particular purpose. It is provided "as **
! 27: ** is" without express or implied warranty of any kind. **
! 28: ** **
! 29: ** These notices must be retained in any copies of any part of this **
! 30: ** documentation and/or software. **
! 31: **********************************************************************
! 32: */
! 33:
! 34: /* -- include the following line if the md5.h header file is separate -- */
! 35: #include "md5.h"
! 36: #include <string.h>
! 37:
! 38: /* forward declaration */
! 39: static void Transform ();
! 40:
! 41: static unsigned char PADDING[64] = {
! 42: 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
! 43: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
! 44: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
! 45: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
! 46: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
! 47: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
! 48: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
! 49: 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
! 50: };
! 51:
! 52: /* F, G and H are basic MD5 functions: selection, majority, parity */
! 53: #define F(x, y, z) (((x) & (y)) | ((~x) & (z)))
! 54: #define G(x, y, z) (((x) & (z)) | ((y) & (~z)))
! 55: #define H(x, y, z) ((x) ^ (y) ^ (z))
! 56: #define I(x, y, z) ((y) ^ ((x) | (~z)))
! 57:
! 58: /* ROTATE_LEFT rotates x left n bits */
! 59: #define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))
! 60:
! 61: /* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 */
! 62: /* Rotation is separate from addition to prevent recomputation */
! 63: #define FF(a, b, c, d, x, s, ac) \
! 64: {(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); \
! 65: (a) = ROTATE_LEFT ((a), (s)); \
! 66: (a) += (b); \
! 67: }
! 68: #define GG(a, b, c, d, x, s, ac) \
! 69: {(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); \
! 70: (a) = ROTATE_LEFT ((a), (s)); \
! 71: (a) += (b); \
! 72: }
! 73: #define HH(a, b, c, d, x, s, ac) \
! 74: {(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); \
! 75: (a) = ROTATE_LEFT ((a), (s)); \
! 76: (a) += (b); \
! 77: }
! 78: #define II(a, b, c, d, x, s, ac) \
! 79: {(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); \
! 80: (a) = ROTATE_LEFT ((a), (s)); \
! 81: (a) += (b); \
! 82: }
! 83:
! 84: void MD5Init (mdContext)
! 85: MD5_CTX *mdContext;
! 86: {
! 87: mdContext->i[0] = mdContext->i[1] = (UINT4)0;
! 88:
! 89: /* Load magic initialization constants.
! 90: */
! 91: mdContext->buf[0] = (UINT4)0x67452301;
! 92: mdContext->buf[1] = (UINT4)0xefcdab89;
! 93: mdContext->buf[2] = (UINT4)0x98badcfe;
! 94: mdContext->buf[3] = (UINT4)0x10325476;
! 95: }
! 96:
! 97: void MD5Update (mdContext, inBuf, inLen)
! 98: MD5_CTX *mdContext;
! 99: unsigned char *inBuf;
! 100: unsigned int inLen;
! 101: {
! 102: UINT4 in[16];
! 103: int mdi;
! 104: unsigned int i, ii;
! 105:
! 106: /* compute number of bytes mod 64 */
! 107: mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
! 108:
! 109: /* update number of bits */
! 110: if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0])
! 111: mdContext->i[1]++;
! 112: mdContext->i[0] += ((UINT4)inLen << 3);
! 113: mdContext->i[1] += ((UINT4)inLen >> 29);
! 114:
! 115: while (inLen--) {
! 116: /* add new character to buffer, increment mdi */
! 117: mdContext->in[mdi++] = *inBuf++;
! 118:
! 119: /* transform if necessary */
! 120: if (mdi == 0x40) {
! 121: for (i = 0, ii = 0; i < 16; i++, ii += 4)
! 122: in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
! 123: (((UINT4)mdContext->in[ii+2]) << 16) |
! 124: (((UINT4)mdContext->in[ii+1]) << 8) |
! 125: ((UINT4)mdContext->in[ii]);
! 126: Transform (mdContext->buf, in);
! 127: mdi = 0;
! 128: }
! 129: }
! 130: }
! 131:
! 132: void MD5Final (md, mdContext)
! 133: unsigned char *md;
! 134: MD5_CTX *mdContext;
! 135: {
! 136: UINT4 in[16];
! 137: int mdi;
! 138: unsigned int i, ii;
! 139: unsigned int padLen;
! 140:
! 141: /* save number of bits */
! 142: in[14] = mdContext->i[0];
! 143: in[15] = mdContext->i[1];
! 144:
! 145: /* compute number of bytes mod 64 */
! 146: mdi = (int)((mdContext->i[0] >> 3) & 0x3F);
! 147:
! 148: /* pad out to 56 mod 64 */
! 149: padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);
! 150: MD5Update (mdContext, PADDING, padLen);
! 151:
! 152: /* append length in bits and transform */
! 153: for (i = 0, ii = 0; i < 14; i++, ii += 4)
! 154: in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |
! 155: (((UINT4)mdContext->in[ii+2]) << 16) |
! 156: (((UINT4)mdContext->in[ii+1]) << 8) |
! 157: ((UINT4)mdContext->in[ii]);
! 158: Transform (mdContext->buf, in);
! 159:
! 160: /* store buffer in digest */
! 161: for (i = 0, ii = 0; i < 4; i++, ii += 4) {
! 162: mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);
! 163: mdContext->digest[ii+1] =
! 164: (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);
! 165: mdContext->digest[ii+2] =
! 166: (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);
! 167: mdContext->digest[ii+3] =
! 168: (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);
! 169: }
! 170: /* copy the resulting digest */
! 171: memcpy(md,mdContext->digest,sizeof(mdContext->digest));
! 172: }
! 173:
! 174: /* Basic MD5 step. Transform buf based on in.
! 175: */
! 176: static void Transform (buf, in)
! 177: UINT4 *buf;
! 178: UINT4 *in;
! 179: {
! 180: UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3];
! 181:
! 182: /* Round 1 */
! 183: #define S11 7
! 184: #define S12 12
! 185: #define S13 17
! 186: #define S14 22
! 187: /* FF ( a, b, c, d, in[ 0], S11, 3614090360); * 1 * */
! 188: FF ( a, b, c, d, in[ 0], S11, 0xD76AA478); /* 1 */
! 189: /* FF ( d, a, b, c, in[ 1], S12, 3905402710); * 2 * */
! 190: FF ( d, a, b, c, in[ 1], S12, 0xE8C7B756); /* 2 */
! 191: /* FF ( c, d, a, b, in[ 2], S13, 606105819); * 3 * */
! 192: FF ( c, d, a, b, in[ 2], S13, 0x242070DB); /* 3 */
! 193: /* FF ( b, c, d, a, in[ 3], S14, 3250441966); * 4 * */
! 194: FF ( b, c, d, a, in[ 3], S14, 0xC1BDCEEE); /* 4 */
! 195: /* FF ( a, b, c, d, in[ 4], S11, 4118548399); * 5 * */
! 196: FF ( a, b, c, d, in[ 4], S11, 0xF57C0FAF); /* 5 */
! 197: /* FF ( d, a, b, c, in[ 5], S12, 1200080426); * 6 * */
! 198: FF ( d, a, b, c, in[ 5], S12, 0x4787C62A); /* 6 */
! 199: /* FF ( c, d, a, b, in[ 6], S13, 2821735955); * 7 * */
! 200: FF ( c, d, a, b, in[ 6], S13, 0xA8304613); /* 7 */
! 201: /* FF ( b, c, d, a, in[ 7], S14, 4249261313); * 8 * */
! 202: FF ( b, c, d, a, in[ 7], S14, 0xFD469501); /* 8 */
! 203: /* FF ( a, b, c, d, in[ 8], S11, 1770035416); * 9 * */
! 204: FF ( a, b, c, d, in[ 8], S11, 0x698098D8); /* 9 */
! 205: /* FF ( d, a, b, c, in[ 9], S12, 2336552879); * 10 * */
! 206: FF ( d, a, b, c, in[ 9], S12, 0x8B44F7AF); /* 10 */
! 207: /* FF ( c, d, a, b, in[10], S13, 4294925233); * 11 * */
! 208: FF ( c, d, a, b, in[10], S13, 0xFFFF5BB1); /* 11 */
! 209: /* FF ( b, c, d, a, in[11], S14, 2304563134); * 12 * */
! 210: FF ( b, c, d, a, in[11], S14, 0x895CD7BE); /* 12 */
! 211: /* FF ( a, b, c, d, in[12], S11, 1804603682); * 13 * */
! 212: FF ( a, b, c, d, in[12], S11, 0x6B901122); /* 13 */
! 213: /* FF ( d, a, b, c, in[13], S12, 4254626195); * 14 * */
! 214: FF ( d, a, b, c, in[13], S12, 0xFD987193); /* 14 */
! 215: /* FF ( c, d, a, b, in[14], S13, 2792965006); * 15 * */
! 216: FF ( c, d, a, b, in[14], S13, 0xA679438E); /* 15 */
! 217: /* FF ( b, c, d, a, in[15], S14, 1236535329); * 16 * */
! 218: FF ( b, c, d, a, in[15], S14, 0x49B40821); /* 16 */
! 219:
! 220: /* Round 2 */
! 221: #define S21 5
! 222: #define S22 9
! 223: #define S23 14
! 224: #define S24 20
! 225: /* GG ( a, b, c, d, in[ 1], S21, 4129170786); * 17 * */
! 226: GG ( a, b, c, d, in[ 1], S21, 0xF61E2562); /* 17 */
! 227: /* GG ( d, a, b, c, in[ 6], S22, 3225465664); * 18 * */
! 228: GG ( d, a, b, c, in[ 6], S22, 0xC040B340); /* 18 */
! 229: /* GG ( c, d, a, b, in[11], S23, 643717713); * 19 * */
! 230: GG ( c, d, a, b, in[11], S23, 0x265E5A51); /* 19 */
! 231: /* GG ( b, c, d, a, in[ 0], S24, 3921069994); * 20 * */
! 232: GG ( b, c, d, a, in[ 0], S24, 0xE9B6C7AA); /* 20 */
! 233: /* GG ( a, b, c, d, in[ 5], S21, 3593408605); * 21 * */
! 234: GG ( a, b, c, d, in[ 5], S21, 0xD62F105D); /* 21 */
! 235: /* GG ( d, a, b, c, in[10], S22, 38016083); * 22 * */
! 236: GG ( d, a, b, c, in[10], S22, 0x2441453); /* 22 */
! 237: /* GG ( c, d, a, b, in[15], S23, 3634488961); * 23 * */
! 238: GG ( c, d, a, b, in[15], S23, 0xD8A1E681); /* 23 */
! 239: /* GG ( b, c, d, a, in[ 4], S24, 3889429448); * 24 * */
! 240: GG ( b, c, d, a, in[ 4], S24, 0xE7D3FBC8); /* 24 */
! 241: /* GG ( a, b, c, d, in[ 9], S21, 568446438); * 25 * */
! 242: GG ( a, b, c, d, in[ 9], S21, 0x21E1CDE6); /* 25 */
! 243: /* GG ( d, a, b, c, in[14], S22, 3275163606); * 26 * */
! 244: GG ( d, a, b, c, in[14], S22, 0xC33707D6); /* 26 */
! 245: /* GG ( c, d, a, b, in[ 3], S23, 4107603335); * 27 * */
! 246: GG ( c, d, a, b, in[ 3], S23, 0xF4D50D87); /* 27 */
! 247: /* GG ( b, c, d, a, in[ 8], S24, 1163531501); * 28 * */
! 248: GG ( b, c, d, a, in[ 8], S24, 0x455A14ED); /* 28 */
! 249: /* GG ( a, b, c, d, in[13], S21, 2850285829); * 29 * */
! 250: GG ( a, b, c, d, in[13], S21, 0xA9E3E905); /* 29 */
! 251: /* GG ( d, a, b, c, in[ 2], S22, 4243563512); * 30 * */
! 252: GG ( d, a, b, c, in[ 2], S22, 0xFCEFA3F8); /* 30 */
! 253: /* GG ( c, d, a, b, in[ 7], S23, 1735328473); * 31 * */
! 254: GG ( c, d, a, b, in[ 7], S23, 0x676F02D9); /* 31 */
! 255: /* GG ( b, c, d, a, in[12], S24, 2368359562); * 32 * */
! 256: GG ( b, c, d, a, in[12], S24, 0x8D2A4C8A); /* 32 */
! 257:
! 258: /* Round 3 */
! 259: #define S31 4
! 260: #define S32 11
! 261: #define S33 16
! 262: #define S34 23
! 263: /* HH ( a, b, c, d, in[ 5], S31, 4294588738); * 33 * */
! 264: HH ( a, b, c, d, in[ 5], S31, 0xFFFA3942); /* 33 */
! 265: /* HH ( d, a, b, c, in[ 8], S32, 2272392833); * 34 * */
! 266: HH ( d, a, b, c, in[ 8], S32, 0x8771F681); /* 34 */
! 267: /* HH ( c, d, a, b, in[11], S33, 1839030562); * 35 * */
! 268: HH ( c, d, a, b, in[11], S33, 0x6D9D6122); /* 35 */
! 269: /* HH ( b, c, d, a, in[14], S34, 4259657740); * 36 * */
! 270: HH ( b, c, d, a, in[14], S34, 0xFDE5380C); /* 36 */
! 271: /* HH ( a, b, c, d, in[ 1], S31, 2763975236); * 37 * */
! 272: HH ( a, b, c, d, in[ 1], S31, 0xA4BEEA44); /* 37 */
! 273: /* HH ( d, a, b, c, in[ 4], S32, 1272893353); * 38 * */
! 274: HH ( d, a, b, c, in[ 4], S32, 0x4BDECFA9); /* 38 */
! 275: /* HH ( c, d, a, b, in[ 7], S33, 4139469664); * 39 * */
! 276: HH ( c, d, a, b, in[ 7], S33, 0xF6BB4B60); /* 39 */
! 277: /* HH ( b, c, d, a, in[10], S34, 3200236656); * 40 * */
! 278: HH ( b, c, d, a, in[10], S34, 0xBEBFBC70); /* 40 */
! 279: /* HH ( a, b, c, d, in[13], S31, 681279174); * 41 * */
! 280: HH ( a, b, c, d, in[13], S31, 0x289B7EC6); /* 41 */
! 281: /* HH ( d, a, b, c, in[ 0], S32, 3936430074); * 42 * */
! 282: HH ( d, a, b, c, in[ 0], S32, 0xEAA127FA); /* 42 */
! 283: /* HH ( c, d, a, b, in[ 3], S33, 3572445317); * 43 * */
! 284: HH ( c, d, a, b, in[ 3], S33, 0xD4EF3085); /* 43 */
! 285: /* HH ( b, c, d, a, in[ 6], S34, 76029189); * 44 * */
! 286: HH ( b, c, d, a, in[ 6], S34, 0x4881D05); /* 44 */
! 287: /* HH ( a, b, c, d, in[ 9], S31, 3654602809); * 45 * */
! 288: HH ( a, b, c, d, in[ 9], S31, 0xD9D4D039); /* 45 */
! 289: /* HH ( d, a, b, c, in[12], S32, 3873151461); * 46 * */
! 290: HH ( d, a, b, c, in[12], S32, 0xE6DB99E5); /* 46 */
! 291: /* HH ( c, d, a, b, in[15], S33, 530742520); * 47 * */
! 292: HH ( c, d, a, b, in[15], S33, 0x1FA27CF8); /* 47 */
! 293: /* HH ( b, c, d, a, in[ 2], S34, 3299628645); * 48 * */
! 294: HH ( b, c, d, a, in[ 2], S34, 0xC4AC5665); /* 48 */
! 295:
! 296: /* Round 4 */
! 297: #define S41 6
! 298: #define S42 10
! 299: #define S43 15
! 300: #define S44 21
! 301: /* II ( a, b, c, d, in[ 0], S41, 4096336452); * 49 * */
! 302: II ( a, b, c, d, in[ 0], S41, 0xF4292244); /* 49 */
! 303: /* II ( d, a, b, c, in[ 7], S42, 1126891415); * 50 * */
! 304: II ( d, a, b, c, in[ 7], S42, 0x432AFF97); /* 50 */
! 305: /* II ( c, d, a, b, in[14], S43, 2878612391); * 51 * */
! 306: II ( c, d, a, b, in[14], S43, 0xAB9423A7); /* 51 */
! 307: /* II ( b, c, d, a, in[ 5], S44, 4237533241); * 52 * */
! 308: II ( b, c, d, a, in[ 5], S44, 0xFC93A039); /* 52 */
! 309: /* II ( a, b, c, d, in[12], S41, 1700485571); * 53 * */
! 310: II ( a, b, c, d, in[12], S41, 0x655B59C3); /* 53 */
! 311: /* II ( d, a, b, c, in[ 3], S42, 2399980690); * 54 * */
! 312: II ( d, a, b, c, in[ 3], S42, 0x8F0CCC92); /* 54 */
! 313: /* II ( c, d, a, b, in[10], S43, 4293915773); * 55 * */
! 314: II ( c, d, a, b, in[10], S43, 0xFFEFF47D); /* 55 */
! 315: /* II ( b, c, d, a, in[ 1], S44, 2240044497); * 56 * */
! 316: II ( b, c, d, a, in[ 1], S44, 0x85845DD1); /* 56 */
! 317: /* II ( a, b, c, d, in[ 8], S41, 1873313359); * 57 * */
! 318: II ( a, b, c, d, in[ 8], S41, 0x6FA87E4F); /* 57 */
! 319: /* II ( d, a, b, c, in[15], S42, 4264355552); * 58 * */
! 320: II ( d, a, b, c, in[15], S42, 0xFE2CE6E0); /* 58 */
! 321: /* II ( c, d, a, b, in[ 6], S43, 2734768916); * 59 * */
! 322: II ( c, d, a, b, in[ 6], S43, 0xA3014314); /* 59 */
! 323: /* II ( b, c, d, a, in[13], S44, 1309151649); * 60 * */
! 324: II ( b, c, d, a, in[13], S44, 0x4E0811A1); /* 60 */
! 325: /* II ( a, b, c, d, in[ 4], S41, 4149444226); * 61 * */
! 326: II ( a, b, c, d, in[ 4], S41, 0xF7537E82); /* 61 */
! 327: /* II ( d, a, b, c, in[11], S42, 3174756917); * 62 * */
! 328: II ( d, a, b, c, in[11], S42, 0xBD3AF235); /* 62 */
! 329: /* II ( c, d, a, b, in[ 2], S43, 718787259); * 63 * */
! 330: II ( c, d, a, b, in[ 2], S43, 0x2AD7D2BB); /* 63 */
! 331: /* II ( b, c, d, a, in[ 9], S44, 3951481745); * 64 * */
! 332: II ( b, c, d, a, in[ 9], S44, 0xEB86D391); /* 64 */
! 333:
! 334: buf[0] += a;
! 335: buf[1] += b;
! 336: buf[2] += c;
! 337: buf[3] += d;
! 338: }
! 339:
! 340: /*
! 341: **********************************************************************
! 342: ** End of md5.c **
! 343: ******************************* (cut) ********************************
! 344: */
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