md5.c

3des算法进行加解密并使用MD5进行相关签名算法

/* =========================================================== 
Copyright (C) 2002  CAS,
R&D Center, yongxin TongFang Co.,Ltd. 
All rights reserved.

FileName:		    MD5.C
					Create Date:		2002.05.16
Author:				gaozhiyang
description :       这个文件声明做MAC的函数
=========================================================== */

#include <stdio.h>
#include <string.h>
#include "md5.h"

void encode (uint1 *output, uint4 *input, uint4 len) 
{
  uint4 i, j;

  for (i = 0, j = 0; j < len; i++, j += 4) 
  {
    output[j]   = (uint1)  (input[i] & 0xff);
    output[j+1] = (uint1) ((input[i] >> 8) & 0xff);
    output[j+2] = (uint1) ((input[i] >> 16) & 0xff);
    output[j+3] = (uint1) ((input[i] >> 24) & 0xff);
  }
}
void decode(uint4 *output, uint1 *input, uint4 len)
{
  uint4 i, j;

  for (i = 0, j = 0; j < len; i++, j += 4)
    output[i] = ((uint4)input[j]) | (((uint4)input[j+1]) << 8) |
      (((uint4)input[j+2]) << 16) | (((uint4)input[j+3]) << 24);
}

uint4 rotate_left(uint4 x, uint4 n)
{
  return (x << n) | (x >> (32-n))  ;
}

uint4 F(uint4 x, uint4 y, uint4 z)
{
  return (x & y) | (~x & z);
}

void FF(uint4 * a, uint4 b, uint4 c, uint4 d, uint4 x,uint4  s, uint4 ac)
{
	*a += F(b, c, d) + x + ac;
	*a = rotate_left (*a, s) +b;
}

uint4 G(uint4 x, uint4 y, uint4 z)
{
  return (x & z) | (y & ~z);
}

void GG(uint4 *a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac)
{
	*a += G(b, c, d) + x + ac;
	*a = rotate_left (*a, s) +b;
}

uint4 H(uint4 x, uint4 y, uint4 z)
{
  return x ^ y ^ z;
}
void HH(uint4 *a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac)
{
	*a += H(b, c, d) + x + ac;
	*a = rotate_left (*a, s) +b;
}

uint4 I(uint4 x, uint4 y, uint4 z)
{
  return y ^ (x | ~z);
}

void II(uint4 *a, uint4 b, uint4 c, uint4 d, uint4 x, uint4 s, uint4 ac)
{
	*a += I(b, c, d) + x + ac;
	*a = rotate_left (*a, s) +b;
}

void transform (uint1 block[64],uint4 *pstate,uint1 *pfinalized){

  uint4 a = pstate[0], b = pstate[1], c = pstate[2], d = pstate[3], x[16];
  decode (x, block, 64);

  /* Round 1 */
  FF(&a, b, c, d, x[ 0], S11, 0xd76aa478); /* 1 */
  FF(&d, a, b, c, x[ 1], S12, 0xe8c7b756); /* 2 */
  FF(&c, d, a, b, x[ 2], S13, 0x242070db); /* 3 */
  FF(&b, c, d, a, x[ 3], S14, 0xc1bdceee); /* 4 */
  FF(&a, b, c, d, x[ 4], S11, 0xf57c0faf); /* 5 */
  FF(&d, a, b, c, x[ 5], S12, 0x4787c62a); /* 6 */
  FF(&c, d, a, b, x[ 6], S13, 0xa8304613); /* 7 */
  FF(&b, c, d, a, x[ 7], S14, 0xfd469501); /* 8 */
  FF(&a, b, c, d, x[ 8], S11, 0x698098d8); /* 9 */
  FF(&d, a, b, c, x[ 9], S12, 0x8b44f7af); /* 10 */
  FF(&c, d, a, b, x[10], S13, 0xffff5bb1); /* 11 */
  FF(&b, c, d, a, x[11], S14, 0x895cd7be); /* 12 */
  FF(&a, b, c, d, x[12], S11, 0x6b901122); /* 13 */
  FF(&d, a, b, c, x[13], S12, 0xfd987193); /* 14 */
  FF(&c, d, a, b, x[14], S13, 0xa679438e); /* 15 */
  FF(&b, c, d, a, x[15], S14, 0x49b40821); /* 16 */

 /* Round 2 */
  GG(&a, b, c, d, x[ 1], S21, 0xf61e2562); /* 17 */
  GG(&d, a, b, c, x[ 6], S22, 0xc040b340); /* 18 */
  GG(&c, d, a, b, x[11], S23, 0x265e5a51); /* 19 */
  GG(&b, c, d, a, x[ 0], S24, 0xe9b6c7aa); /* 20 */
  GG(&a, b, c, d, x[ 5], S21, 0xd62f105d); /* 21 */
  GG(&d, a, b, c, x[10], S22,  0x2441453); /* 22 */
  GG(&c, d, a, b, x[15], S23, 0xd8a1e681); /* 23 */
  GG(&b, c, d, a, x[ 4], S24, 0xe7d3fbc8); /* 24 */
  GG(&a, b, c, d, x[ 9], S21, 0x21e1cde6); /* 25 */
  GG(&d, a, b, c, x[14], S22, 0xc33707d6); /* 26 */
  GG(&c, d, a, b, x[ 3], S23, 0xf4d50d87); /* 27 */
  GG(&b, c, d, a, x[ 8], S24, 0x455a14ed); /* 28 */
  GG(&a, b, c, d, x[13], S21, 0xa9e3e905); /* 29 */
  GG(&d, a, b, c, x[ 2], S22, 0xfcefa3f8); /* 30 */
  GG(&c, d, a, b, x[ 7], S23, 0x676f02d9); /* 31 */
  GG(&b, c, d, a, x[12], S24, 0x8d2a4c8a); /* 32 */

  /* Round 3 */
  HH(&a, b, c, d, x[ 5], S31, 0xfffa3942); /* 33 */
  HH(&d, a, b, c, x[ 8], S32, 0x8771f681); /* 34 */
  HH(&c, d, a, b, x[11], S33, 0x6d9d6122); /* 35 */
  HH(&b, c, d, a, x[14], S34, 0xfde5380c); /* 36 */
  HH(&a, b, c, d, x[ 1], S31, 0xa4beea44); /* 37 */
  HH(&d, a, b, c, x[ 4], S32, 0x4bdecfa9); /* 38 */
  HH(&c, d, a, b, x[ 7], S33, 0xf6bb4b60); /* 39 */
  HH(&b, c, d, a, x[10], S34, 0xbebfbc70); /* 40 */
  HH(&a, b, c, d, x[13], S31, 0x289b7ec6); /* 41 */
  HH(&d, a, b, c, x[ 0], S32, 0xeaa127fa); /* 42 */
  HH(&c, d, a, b, x[ 3], S33, 0xd4ef3085); /* 43 */
  HH(&b, c, d, a, x[ 6], S34,  0x4881d05); /* 44 */
  HH(&a, b, c, d, x[ 9], S31, 0xd9d4d039); /* 45 */
  HH(&d, a, b, c, x[12], S32, 0xe6db99e5); /* 46 */
  HH(&c, d, a, b, x[15], S33, 0x1fa27cf8); /* 47 */
  HH(&b, c, d, a, x[ 2], S34, 0xc4ac5665); /* 48 */

  /* Round 4 */
  II(&a, b, c, d, x[ 0], S41, 0xf4292244); /* 49 */
  II(&d, a, b, c, x[ 7], S42, 0x432aff97); /* 50 */
  II(&c, d, a, b, x[14], S43, 0xab9423a7); /* 51 */
  II(&b, c, d, a, x[ 5], S44, 0xfc93a039); /* 52 */
  II(&a, b, c, d, x[12], S41, 0x655b59c3); /* 53 */
  II(&d, a, b, c, x[ 3], S42, 0x8f0ccc92); /* 54 */
  II(&c, d, a, b, x[10], S43, 0xffeff47d); /* 55 */
  II(&b, c, d, a, x[ 1], S44, 0x85845dd1); /* 56 */
  II(&a, b, c, d, x[ 8], S41, 0x6fa87e4f); /* 57 */
  II(&d, a, b, c, x[15], S42, 0xfe2ce6e0); /* 58 */
  II(&c, d, a, b, x[ 6], S43, 0xa3014314); /* 59 */
  II(&b, c, d, a, x[13], S44, 0x4e0811a1); /* 60 */
  II(&a, b, c, d, x[ 4], S41, 0xf7537e82); /* 61 */
  II(&d, a, b, c, x[11], S42, 0xbd3af235); /* 62 */
  II(&c, d, a, b, x[ 2], S43, 0x2ad7d2bb); /* 63 */
  II(&b, c, d, a, x[ 9], S44, 0xeb86d391); /* 64 */

  pstate[0] += a;
  pstate[1] += b;
  pstate[2] += c;
  pstate[3] += d;
   memset ( (uint1 *) x, 0, sizeof(x));
 }
 void update (uint1 *input, uint4 input_length,uint4 *pstate,uint1 *pfinalized,uint4 *pcount,uint1 *pbuffer) {

  uint4 input_index, buffer_index;
  uint4 buffer_space;                

  if (*pfinalized)
    return;
  buffer_index = (uint4)((pcount[0] >> 3) & 0x3F);

  if (  (pcount[0] += ((uint4) input_length << 3))<((uint4) input_length << 3) )
    pcount[1]++;

  pcount[1] += ((uint4)input_length >> 29);

  buffer_space = 64 - buffer_index;  

  if (input_length >= buffer_space) 
  { 
    memcpy (pbuffer + buffer_index, input, buffer_space);
    transform (pbuffer,pstate,pfinalized);

    for (input_index = buffer_space; input_index + 63 < input_length;  input_index += 64)
      transform (input+input_index,pstate,pfinalized);

    buffer_index = 0;  
  }
  else
    input_index=0;     

 memcpy(pbuffer+buffer_index, input+input_index, input_length-input_index);
}

void finalize(uint4 *pstate,uint1 *pfinalized,uint4 *pcount,uint1 *pbuffer,uint1 *pOutPut)
{
  unsigned char bits[8];
  uint4 index, padLen;
  uint1 PADDING[64]=
  {
    0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
  };

  if (*pfinalized)
    return;
 
  encode (bits, pcount, 8);
  index = (uint4) ((pcount[0] >> 3) & 0x3f);
  padLen = (index < 56) ? (56 - index) : (120 - index);
  update (PADDING, padLen,pstate,pfinalized,pcount,pbuffer);
  update (bits, 8,pstate,pfinalized,pcount,pbuffer);
  encode (pOutPut, pstate, 16);
  memset (pbuffer, 0, sizeof(*pbuffer));
  *pfinalized=1;
}

unsigned char  TFCA_MD5(unsigned char *pInPut,uint4 dwInput_Length,unsigned char *pOutPut)
{
	uint4 state[4];
	uint4 count[2];     
	uint1 buffer[64];   
	uint1 finalized;
	
	finalized=0; 
	count[0] = 0;
	count[1] = 0;
	
	state[0] = 0x67452301;
	state[1] = 0xefcdab89;
	state[2] = 0x98badcfe;
	state[3] = 0x10325476;
	
	update(pInPut, dwInput_Length,state,&finalized,count,buffer);
	finalize(state,&finalized,count,buffer,pOutPut);
	return 0x00;
}