SecurityTests/cspxutils/hashTimeSA/MD5.c

   1 /*
   2         File:           MD5.c
   3
   4         Written by:     Colin Plumb
   5
   6         Copyright:      Copyright (c) 1998,2004-2005 Apple Computer, Inc. All Rights Reserved.
   7
   8         Change History (most recent first):
   9
  10                  <7>    10/06/98        ap              Changed to compile with C++.
  11
  12         To Do:
  13 */
  14
  15 /* Copyright (c) 1998,2004-2005 Apple Computer, Inc.  All Rights Reserved.
  16  *
  17  * NOTICE: USE OF THE MATERIALS ACCOMPANYING THIS NOTICE IS SUBJECT
  18  * TO THE TERMS OF THE SIGNED "FAST ELLIPTIC ENCRYPTION (FEE) REFERENCE
  19  * SOURCE CODE EVALUATION AGREEMENT" BETWEEN APPLE COMPUTER, INC. AND THE
  20  * ORIGINAL LICENSEE THAT OBTAINED THESE MATERIALS FROM APPLE COMPUTER,
  21  * INC.  ANY USE OF THESE MATERIALS NOT PERMITTED BY SUCH AGREEMENT WILL
  22  * EXPOSE YOU TO LIABILITY.
  23  ***************************************************************************
  24  *
  25  * MD5.c
  26  */
  27
  28 /*
  29  * This code implements the MD5 message-digest algorithm.
  30  * The algorithm is due to Ron Rivest.  This code was
  31  * written by Colin Plumb in 1993, no copyright is claimed.
  32  * This code is in the public domain; do with it what you wish.
  33  *
  34  * Equivalent code is available from RSA Data Security, Inc.
  35  * This code has been tested against that, and is equivalent,
  36  * except that you don't need to include two pages of legalese
  37  * with every copy.
  38  *
  39  * To compute the message digest of a chunk of bytes, declare an
  40  * MD5Context structure, pass it to MD5Init, call MD5Update as
  41  * needed on buffers full of bytes, and then call MD5Final, which
  42  * will fill a supplied 16-byte array with the digest.
  43  */
  44
  45 /*
  46  * Revision History
  47  * ----------------
  48  * 06 Feb 1997  Doug Mitchell at Apple
  49  *      Fixed endian-dependent cast in MD5Final()
  50  *      Made byteReverse() tolerant of platform-dependent alignment
  51  *              restrictions
  52  */
  53
  54 #include "MD5.h"
  55 //#include "platform.h"
  56 #undef __LITTLE_ENDIAN__
  57 #undef __BIG_ENDIAN__
  58 #define __BIG_ENDIAN__
  59
  60 #include <stdlib.h>
  61 #include <strings.h>
  62
  63 static inline void intToByteRep(int i, unsigned char *buf)
  64 {
  65         *buf++ = (unsigned char)((i >> 24) & 0xff);
  66         *buf++ = (unsigned char)((i >> 16) & 0xff);
  67         *buf++ = (unsigned char)((i >> 8)  & 0xff);
  68         *buf   = (unsigned char)(i & 0xff);
  69 }
  70
  71 #define MD5_DEBUG       0
  72
  73 #if     MD5_DEBUG
  74 static inline void dumpCtx(struct MD5Context *ctx, char *label)
  75 {
  76         int i;
  77
  78         printf("%s\n", label);
  79         printf("buf = ");
  80         for(i=0; i<4; i++) {
  81                 printf("%x:", ctx->buf[i]);
  82         }
  83         printf("\nbits: %d:%d\n", ctx->bits[0], ctx->bits[1]);
  84         printf("in[]:\n   ");
  85         for(i=0; i<64; i++) {
  86                 printf("%02x:", ctx->in[i]);
  87                 if((i % 16) == 15) {
  88                         printf("\n   ");
  89                 }
  90         }
  91         printf("\n");
  92 }
  93 #else   // MD5_DEBUG
  94 #define dumpCtx(ctx, label)
  95 #endif  // MD5_DEBUG
  96
  97 static void MD5Transform(uint32 buf[4], uint32 const in[16]);
  98
  99 #ifdef __LITTLE_ENDIAN__
 100 #define byteReverse(buf, len)   /* Nothing */
 101 #else
 102 static void byteReverse(unsigned char *buf, unsigned longs);
 103
 104 #ifndef ASM_MD5
 105 /*
 106  * Note: this code is harmless on little-endian machines.
 107  */
 108 static void byteReverse(unsigned char *buf, unsigned longs)
 109 {
 110 #if             old_way
 111     /*
 112      * this code is NOT harmless on big-endian machine which require
 113      * natural alignment.
 114      */
 115     uint32 t;
 116     do {
 117         t = (uint32) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
 118             ((unsigned) buf[1] << 8 | buf[0]);
 119         *(uint32 *) buf = t;
 120         buf += 4;
 121     } while (--longs);
 122 #else   // new_way
 123
 124     unsigned char t;
 125     do {
 126         t = buf[0];
 127         buf[0] = buf[3];
 128         buf[3] = t;
 129         t = buf[1];
 130         buf[1] = buf[2];
 131         buf[2] = t;
 132         buf += 4;
 133     } while (--longs);
 134 #endif // old_way
 135 }
 136 #endif // ASM_MD5
 137 #endif // __LITTLE_ENDIAN__
 138
 139 /*
 140  * Start MD5 accumulation.  Set bit count to 0 and buffer to mysterious
 141  * initialization constants.
 142  */
 143 void MD5Init(struct MD5Context *ctx)
 144 {
 145     ctx->buf[0] = 0x67452301;
 146     ctx->buf[1] = 0xefcdab89;
 147     ctx->buf[2] = 0x98badcfe;
 148     ctx->buf[3] = 0x10325476;
 149
 150     ctx->bits[0] = 0;
 151     ctx->bits[1] = 0;
 152 }
 153
 154 /*
 155  * Update context to reflect the concatenation of another buffer full
 156  * of bytes.
 157  */
 158 void MD5Update(struct MD5Context *ctx, unsigned char const *buf, unsigned len)
 159 {
 160     uint32 t;
 161
 162     dumpCtx(ctx, "MD5.c update top");
 163     /* Update bitcount */
 164
 165     t = ctx->bits[0];
 166     if ((ctx->bits[0] = t + ((uint32) len << 3)) < t)
 167         ctx->bits[1]++;         /* Carry from low to high */
 168     ctx->bits[1] += len >> 29;
 169
 170     t = (t >> 3) & 0x3f;        /* Bytes already in shsInfo->data */
 171
 172     /* Handle any leading odd-sized chunks */
 173
 174     if (t) {
 175         unsigned char *p = (unsigned char *) ctx->in + t;
 176
 177         t = 64 - t;
 178         if (len < t) {
 179             memcpy(p, buf, len);
 180             return;
 181         }
 182         memcpy(p, buf, t);
 183         byteReverse(ctx->in, 16);
 184         MD5Transform(ctx->buf, (uint32 *) ctx->in);
 185         dumpCtx(ctx, "update - return from transform (1)");
 186         buf += t;
 187         len -= t;
 188     }
 189     /* Process data in 64-byte chunks */
 190
 191     while (len >= 64) {
 192         memcpy(ctx->in, buf, 64);
 193         byteReverse(ctx->in, 16);
 194         MD5Transform(ctx->buf, (uint32 *) ctx->in);
 195         dumpCtx(ctx, "update - return from transform (2)");
 196         buf += 64;
 197         len -= 64;
 198     }
 199
 200     /* Handle any remaining bytes of data. */
 201
 202     memcpy(ctx->in, buf, len);
 203 }
 204
 205 /*
 206  * Final wrapup - pad to 64-byte boundary with the bit pattern
 207  * 1 0* (64-bit count of bits processed, MSB-first)
 208  */
 209 void MD5Final(struct MD5Context *ctx, unsigned char *digest)
 210 {
 211     unsigned count;
 212     unsigned char *p;
 213
 214     dumpCtx(ctx, "final top");
 215
 216     /* Compute number of bytes mod 64 */
 217     count = (ctx->bits[0] >> 3) & 0x3F;
 218
 219     /* Set the first char of padding to 0x80.  This is safe since there is
 220        always at least one byte free */
 221     p = ctx->in + count;
 222     *p++ = 0x80;
 223     #if MD5_DEBUG
 224     printf("in[%d] = %x\n", count, ctx->in[count]);
 225     #endif
 226     /* Bytes of padding needed to make 64 bytes */
 227     count = 64 - 1 - count;
 228
 229     /* Pad out to 56 mod 64 */
 230     dumpCtx(ctx, "final, before pad");
 231     if (count < 8) {
 232                 /* Two lots of padding:  Pad the first block to 64 bytes */
 233                 bzero(p, count);
 234                 byteReverse(ctx->in, 16);
 235                 MD5Transform(ctx->buf, (uint32 *) ctx->in);
 236
 237                 /* Now fill the next block with 56 bytes */
 238                 bzero(ctx->in, 56);
 239     } else {
 240         /* Pad block to 56 bytes */
 241                 bzero(p, count - 8);
 242     }
 243     byteReverse(ctx->in, 14);
 244
 245     /* Append length in bits and transform */
 246         #ifdef  __LITTLE_ENDIAN__
 247         /* l.s. byte of bits[0] --> in[56] */
 248     ((uint32 *) ctx->in)[14] = ctx->bits[0];
 249     ((uint32 *) ctx->in)[15] = ctx->bits[1];
 250     #else
 251         /* l.s. byte of bits[0] --> in[60] */
 252     intToByteRep(ctx->bits[0], &ctx->in[56]);
 253     intToByteRep(ctx->bits[1], &ctx->in[60]);
 254         #endif
 255
 256     dumpCtx(ctx, "last transform");
 257     MD5Transform(ctx->buf, (uint32 *) ctx->in);
 258     byteReverse((unsigned char *) ctx->buf, 4);
 259     memcpy(digest, ctx->buf, MD5_DIGEST_SIZE);
 260     dumpCtx(ctx, "final end");
 261
 262     bzero(ctx, sizeof(*ctx));   /* In case it's sensitive */
 263 }
 264
 265 #ifndef ASM_MD5
 266
 267 /* The four core functions - F1 is optimized somewhat */
 268
 269 /* #define F1(x, y, z) (x & y | ~x & z) */
 270 #define F1(x, y, z) (z ^ (x & (y ^ z)))
 271 #define F2(x, y, z) F1(z, x, y)
 272 #define F3(x, y, z) (x ^ y ^ z)
 273 #define F4(x, y, z) (y ^ (x | ~z))
 274
 275 /* This is the central step in the MD5 algorithm. */
 276 #define MD5STEP(f, w, x, y, z, data, s) \
 277         ( w += f(x, y, z) + data,  w = w<<s | w>>(32-s),  w += x )
 278
 279 /*
 280  * The core of the MD5 algorithm, this alters an existing MD5 hash to
 281  * reflect the addition of 16 longwords of new data.  MD5Update blocks
 282  * the data and converts bytes into longwords for this routine.
 283  */
 284 static void MD5Transform(uint32 buf[4], uint32 const in[16])
 285 {
 286     register uint32 a, b, c, d;
 287
 288     a = buf[0];
 289     b = buf[1];
 290     c = buf[2];
 291     d = buf[3];
 292
 293     MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
 294     MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
 295     MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
 296     MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
 297     MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
 298     MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
 299     MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
 300     MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
 301     MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
 302     MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
 303     MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
 304     MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
 305     MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
 306     MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
 307     MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
 308     MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
 309
 310     MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
 311     MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
 312     MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
 313     MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
 314     MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
 315     MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
 316     MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
 317     MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
 318     MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
 319     MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
 320     MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
 321     MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
 322     MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
 323     MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
 324     MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
 325     MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
 326
 327     MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
 328     MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
 329     MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
 330     MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
 331     MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
 332     MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
 333     MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
 334     MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
 335     MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
 336     MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
 337     MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
 338     MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
 339     MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
 340     MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
 341     MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
 342     MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
 343
 344     MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
 345     MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
 346     MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
 347     MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
 348     MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
 349     MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
 350     MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
 351     MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
 352     MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
 353     MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
 354     MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
 355     MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
 356     MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
 357     MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
 358     MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
 359     MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
 360
 361     buf[0] += a;
 362     buf[1] += b;
 363     buf[2] += c;
 364     buf[3] += d;
 365 }
 366
 367 #endif // ASM_MD5