view Lib/fftw-3.2.1/kernel/md5.c @ 1:e86e9c111b29

Updates stuff that potentially fixes the memory leak and also makes it work on Windows and Linux (Need to test). Still have to fix fftw include for linux in Jucer.

/*
 * Copyright (c) 2003, 2007-8 Matteo Frigo
 * Copyright (c) 2003, 2007-8 Massachusetts Institute of Technology
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */

/* 
   independent implementation of Ron Rivest's MD5 message-digest
   algorithm, based on rfc 1321.

   Optimized for small code size, not speed.  Works as long as
   sizeof(md5uint) >= 4.
*/

#include "ifftw.h"

/* sintab[i] = 4294967296.0 * abs(sin((double)(i + 1))) */
static const md5uint sintab[64] = {
     0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
     0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
     0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
     0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
     0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
     0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
     0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
     0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
     0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
     0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
     0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
     0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
     0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
     0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
     0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
     0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
}; 

/* see rfc 1321 section 3.4 */
static const struct roundtab {
     char k; 
     char s;
} roundtab[64] = {
     {  0,  7}, {  1, 12}, {  2, 17}, {  3, 22},
     {  4,  7}, {  5, 12}, {  6, 17}, {  7, 22},
     {  8,  7}, {  9, 12}, { 10, 17}, { 11, 22},
     { 12,  7}, { 13, 12}, { 14, 17}, { 15, 22},
     {  1,  5}, {  6,  9}, { 11, 14}, {  0, 20},
     {  5,  5}, { 10,  9}, { 15, 14}, {  4, 20},
     {  9,  5}, { 14,  9}, {  3, 14}, {  8, 20},
     { 13,  5}, {  2,  9}, {  7, 14}, { 12, 20},
     {  5,  4}, {  8, 11}, { 11, 16}, { 14, 23},
     {  1,  4}, {  4, 11}, {  7, 16}, { 10, 23},
     { 13,  4}, {  0, 11}, {  3, 16}, {  6, 23},
     {  9,  4}, { 12, 11}, { 15, 16}, {  2, 23},
     {  0,  6}, {  7, 10}, { 14, 15}, {  5, 21},
     { 12,  6}, {  3, 10}, { 10, 15}, {  1, 21},
     {  8,  6}, { 15, 10}, {  6, 15}, { 13, 21},
     {  4,  6}, { 11, 10}, {  2, 15}, {  9, 21}
};

#define rol(a, s) ((a << (int)(s)) | (a >> (32 - (int)(s))))

static void doblock(md5sig state, const unsigned char *data)
{
     md5uint a, b, c, d, t, x[16];
     const md5uint msk = (md5uint)0xffffffffUL;
     int i;

     /* encode input bytes into md5uint */
     for (i = 0; i < 16; ++i) {
	  const unsigned char *p = data + 4 * i;
	  x[i] = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
     }

     a = state[0]; b = state[1]; c = state[2]; d = state[3];
     for (i = 0; i < 64; ++i) {
	  const struct roundtab *p = roundtab + i;
	  switch (i >> 4) {
	      case 0: a += (b & c) | (~b & d); break;
	      case 1: a += (b & d) | (c & ~d); break;
	      case 2: a += b ^ c ^ d; break;
	      case 3: a += c ^ (b | ~d); break;
	  }
	  a += sintab[i];
	  a += x[(int)(p->k)];
	  a &= msk;
	  t = b + rol(a, p->s);
	  a = d; d = c; c = b; b = t;
     }
     state[0] = (state[0] + a) & msk;
     state[1] = (state[1] + b) & msk;
     state[2] = (state[2] + c) & msk;
     state[3] = (state[3] + d) & msk;
}


void X(md5begin)(md5 *p)
{
     p->s[0] = 0x67452301;
     p->s[1] = 0xefcdab89;
     p->s[2] = 0x98badcfe;
     p->s[3] = 0x10325476;
     p->l = 0;
}

void X(md5putc)(md5 *p, unsigned char c)
{
     p->c[p->l % 64] = c;
     if (((++p->l) % 64) == 0) doblock(p->s, p->c);
}

void X(md5end)(md5 *p)
{
     unsigned l, i;

     l = 8 * p->l; /* length before padding, in bits */

     /* rfc 1321 section 3.1: padding */
     X(md5putc)(p, 0x80);
     while ((p->l % 64) != 56) X(md5putc)(p, 0x00);

     /* rfc 1321 section 3.2: length (little endian) */
     for (i = 0; i < 8; ++i) {
	  X(md5putc)(p, l & 0xFF);
	  l = l >> 8;
     }

     /* Now p->l % 64 == 0 and signature is in p->s */
}