All pastes #487285 Raw Edit

Unnamed

public cpp v1 · immutable
·published 2007-05-14 11:16 UTC
rendered paste body
/* ********************************************************************** ** md5.c                                                            ** ** RSA Data Security, Inc. MD5 Message Digest Algorithm             ** ** Created: 2/17/90 RLR                                             ** ** Revised: 1/91 SRD,AJ,BSK,JT Reference C Version                  ** ********************************************************************** *//* ********************************************************************** ** Copyright (C) 1990, RSA Data Security, Inc. All rights reserved. ** **                                                                  ** ** License to copy and use this software is granted provided that   ** ** it is identified as the "RSA Data Security, Inc. MD5 Message     ** ** Digest Algorithm" in all material mentioning or referencing this ** ** software or this function.                                       ** **                                                                  ** ** License is also granted to make and use derivative works         ** ** provided that such works are identified as "derived from the RSA ** ** Data Security, Inc. MD5 Message Digest Algorithm" in all         ** ** material mentioning or referencing the derived work.             ** **                                                                  ** ** RSA Data Security, Inc. makes no representations concerning      ** ** either the merchantability of this software or the suitability   ** ** of this software for any particular purpose.  It is provided "as ** ** is" without express or implied warranty of any kind.             ** **                                                                  ** ** These notices must be retained in any copies of any part of this ** ** documentation and/or software.                                   ** ********************************************************************** */#include "md5.h"static unsigned char PADDING[64] = {  0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};/* F, G and H are basic MD5 functions: selection, majority, parity */#define F(x, y, z) (((x) & (y)) | ((~x) & (z)))#define G(x, y, z) (((x) & (z)) | ((y) & (~z)))#define H(x, y, z) ((x) ^ (y) ^ (z))#define I(x, y, z) ((y) ^ ((x) | (~z))) /* ROTATE_LEFT rotates x left n bits */#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32-(n))))/* FF, GG, HH, and II transformations for rounds 1, 2, 3, and 4 *//* Rotation is separate from addition to prevent recomputation */#define FF(a, b, c, d, x, s, ac) {(a) += F ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }#define GG(a, b, c, d, x, s, ac) {(a) += G ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }#define HH(a, b, c, d, x, s, ac) {(a) += H ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }#define II(a, b, c, d, x, s, ac) {(a) += I ((b), (c), (d)) + (x) + (UINT4)(ac); (a) = ROTATE_LEFT ((a), (s)); (a) += (b); }/* Basic MD5 step. Transform buf based on in. */static void Transform (UINT4 *buf, UINT4 *in){  UINT4 a = buf[0], b = buf[1], c = buf[2], d = buf[3];  /* Round 1 */#define S11 7#define S12 12#define S13 17#define S14 22  FF ( a, b, c, d, in[ 0], S11, (UINT4) 3614090360u); /* 1 */  FF ( d, a, b, c, in[ 1], S12, (UINT4) 3905402710u); /* 2 */  FF ( c, d, a, b, in[ 2], S13, (UINT4)  606105819u); /* 3 */  FF ( b, c, d, a, in[ 3], S14, (UINT4) 3250441966u); /* 4 */  FF ( a, b, c, d, in[ 4], S11, (UINT4) 4118548399u); /* 5 */  FF ( d, a, b, c, in[ 5], S12, (UINT4) 1200080426u); /* 6 */  FF ( c, d, a, b, in[ 6], S13, (UINT4) 2821735955u); /* 7 */  FF ( b, c, d, a, in[ 7], S14, (UINT4) 4249261313u); /* 8 */  FF ( a, b, c, d, in[ 8], S11, (UINT4) 1770035416u); /* 9 */  FF ( d, a, b, c, in[ 9], S12, (UINT4) 2336552879u); /* 10 */  FF ( c, d, a, b, in[10], S13, (UINT4) 4294925233u); /* 11 */  FF ( b, c, d, a, in[11], S14, (UINT4) 2304563134u); /* 12 */  FF ( a, b, c, d, in[12], S11, (UINT4) 1804603682u); /* 13 */  FF ( d, a, b, c, in[13], S12, (UINT4) 4254626195u); /* 14 */  FF ( c, d, a, b, in[14], S13, (UINT4) 2792965006u); /* 15 */  FF ( b, c, d, a, in[15], S14, (UINT4) 1236535329u); /* 16 */  /* Round 2 */#define S21 5#define S22 9#define S23 14#define S24 20  GG ( a, b, c, d, in[ 1], S21, (UINT4) 4129170786u); /* 17 */  GG ( d, a, b, c, in[ 6], S22, (UINT4) 3225465664u); /* 18 */  GG ( c, d, a, b, in[11], S23, (UINT4)  643717713u); /* 19 */  GG ( b, c, d, a, in[ 0], S24, (UINT4) 3921069994u); /* 20 */  GG ( a, b, c, d, in[ 5], S21, (UINT4) 3593408605u); /* 21 */  GG ( d, a, b, c, in[10], S22, (UINT4)   38016083u); /* 22 */  GG ( c, d, a, b, in[15], S23, (UINT4) 3634488961u); /* 23 */  GG ( b, c, d, a, in[ 4], S24, (UINT4) 3889429448u); /* 24 */  GG ( a, b, c, d, in[ 9], S21, (UINT4)  568446438u); /* 25 */  GG ( d, a, b, c, in[14], S22, (UINT4) 3275163606u); /* 26 */  GG ( c, d, a, b, in[ 3], S23, (UINT4) 4107603335u); /* 27 */  GG ( b, c, d, a, in[ 8], S24, (UINT4) 1163531501u); /* 28 */  GG ( a, b, c, d, in[13], S21, (UINT4) 2850285829u); /* 29 */  GG ( d, a, b, c, in[ 2], S22, (UINT4) 4243563512u); /* 30 */  GG ( c, d, a, b, in[ 7], S23, (UINT4) 1735328473u); /* 31 */  GG ( b, c, d, a, in[12], S24, (UINT4) 2368359562u); /* 32 */  /* Round 3 */#define S31 4#define S32 11#define S33 16#define S34 23  HH ( a, b, c, d, in[ 5], S31, (UINT4) 4294588738u); /* 33 */  HH ( d, a, b, c, in[ 8], S32, (UINT4) 2272392833u); /* 34 */  HH ( c, d, a, b, in[11], S33, (UINT4) 1839030562u); /* 35 */  HH ( b, c, d, a, in[14], S34, (UINT4) 4259657740u); /* 36 */  HH ( a, b, c, d, in[ 1], S31, (UINT4) 2763975236u); /* 37 */  HH ( d, a, b, c, in[ 4], S32, (UINT4) 1272893353u); /* 38 */  HH ( c, d, a, b, in[ 7], S33, (UINT4) 4139469664u); /* 39 */  HH ( b, c, d, a, in[10], S34, (UINT4) 3200236656u); /* 40 */  HH ( a, b, c, d, in[13], S31, (UINT4)  681279174u); /* 41 */  HH ( d, a, b, c, in[ 0], S32, (UINT4) 3936430074u); /* 42 */  HH ( c, d, a, b, in[ 3], S33, (UINT4) 3572445317u); /* 43 */  HH ( b, c, d, a, in[ 6], S34, (UINT4)   76029189u); /* 44 */  HH ( a, b, c, d, in[ 9], S31, (UINT4) 3654602809u); /* 45 */  HH ( d, a, b, c, in[12], S32, (UINT4) 3873151461u); /* 46 */  HH ( c, d, a, b, in[15], S33, (UINT4)  530742520u); /* 47 */  HH ( b, c, d, a, in[ 2], S34, (UINT4) 3299628645u); /* 48 */  /* Round 4 */#define S41 6#define S42 10#define S43 15#define S44 21  II ( a, b, c, d, in[ 0], S41, (UINT4) 4096336452u); /* 49 */  II ( d, a, b, c, in[ 7], S42, (UINT4) 1126891415u); /* 50 */  II ( c, d, a, b, in[14], S43, (UINT4) 2878612391u); /* 51 */  II ( b, c, d, a, in[ 5], S44, (UINT4) 4237533241u); /* 52 */  II ( a, b, c, d, in[12], S41, (UINT4) 1700485571u); /* 53 */  II ( d, a, b, c, in[ 3], S42, (UINT4) 2399980690u); /* 54 */  II ( c, d, a, b, in[10], S43, (UINT4) 4293915773u); /* 55 */  II ( b, c, d, a, in[ 1], S44, (UINT4) 2240044497u); /* 56 */  II ( a, b, c, d, in[ 8], S41, (UINT4) 1873313359u); /* 57 */  II ( d, a, b, c, in[15], S42, (UINT4) 4264355552u); /* 58 */  II ( c, d, a, b, in[ 6], S43, (UINT4) 2734768916u); /* 59 */  II ( b, c, d, a, in[13], S44, (UINT4) 1309151649u); /* 60 */  II ( a, b, c, d, in[ 4], S41, (UINT4) 4149444226u); /* 61 */  II ( d, a, b, c, in[11], S42, (UINT4) 3174756917u); /* 62 */  II ( c, d, a, b, in[ 2], S43, (UINT4)  718787259u); /* 63 */  II ( b, c, d, a, in[ 9], S44, (UINT4) 3951481745u); /* 64 */  buf[0] += a;  buf[1] += b;  buf[2] += c;  buf[3] += d;}void MD5Init (MD5_CTX *mdContext){  mdContext->i[0] = mdContext->i[1] = (UINT4)0;  /* Load magic initialization constants.   */  mdContext->buf[0] = (UINT4)0x67452301;  mdContext->buf[1] = (UINT4)0xefcdab89;  mdContext->buf[2] = (UINT4)0x98badcfe;  mdContext->buf[3] = (UINT4)0x10325476;}void MD5Update (MD5_CTX *mdContext, unsigned char *inBuf, unsigned int inLen){  UINT4 in[16];  int mdi;  unsigned int i, ii;  /* compute number of bytes mod 64 */  mdi = (int)((mdContext->i[0] >> 3) & 0x3F);  /* update number of bits */  if ((mdContext->i[0] + ((UINT4)inLen << 3)) < mdContext->i[0])    mdContext->i[1]++;  mdContext->i[0] += ((UINT4)inLen << 3);  mdContext->i[1] += ((UINT4)inLen >> 29);  while (inLen--) {    /* add new character to buffer, increment mdi */    mdContext->in[mdi++] = *inBuf++;    /* transform if necessary */    if (mdi == 0x40) {      for (i = 0, ii = 0; i < 16; i++, ii += 4)        in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |                (((UINT4)mdContext->in[ii+2]) << 16) |                (((UINT4)mdContext->in[ii+1]) << 8) |                ((UINT4)mdContext->in[ii]);      Transform (mdContext->buf, in);      mdi = 0;    }  }}void MD5Final (MD5_CTX *mdContext){  UINT4 in[16];  int mdi;  unsigned int i, ii;  unsigned int padLen;  /* save number of bits */  in[14] = mdContext->i[0];  in[15] = mdContext->i[1];  /* compute number of bytes mod 64 */  mdi = (int)((mdContext->i[0] >> 3) & 0x3F);  /* pad out to 56 mod 64 */  padLen = (mdi < 56) ? (56 - mdi) : (120 - mdi);  MD5Update (mdContext, PADDING, padLen);  /* append length in bits and transform */  for (i = 0, ii = 0; i < 14; i++, ii += 4)    in[i] = (((UINT4)mdContext->in[ii+3]) << 24) |            (((UINT4)mdContext->in[ii+2]) << 16) |            (((UINT4)mdContext->in[ii+1]) << 8) |            ((UINT4)mdContext->in[ii]);  Transform (mdContext->buf, in);  /* store buffer in digest */  for (i = 0, ii = 0; i < 4; i++, ii += 4) {    mdContext->digest[ii] = (unsigned char)(mdContext->buf[i] & 0xFF);    mdContext->digest[ii+1] =      (unsigned char)((mdContext->buf[i] >> 8) & 0xFF);    mdContext->digest[ii+2] =      (unsigned char)((mdContext->buf[i] >> 16) & 0xFF);    mdContext->digest[ii+3] =      (unsigned char)((mdContext->buf[i] >> 24) & 0xFF);  }}