filemd5.c文件
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#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)))
#define RL(x, y) (((x) << (y)) | ((x) >> (32 - (y)))) //x向左循环移y位
#define PP(x) (x<<24)|((x<<8)&0xff0000)|((x>>8)&0xff00)|(x>>24) //将x高低位互换,例如PP(aabbccdd)=ddccbbaa
#define FF(a, b, c, d, x, s, ac) a = b + (RL((a + F(b,c,d) + x + ac),s))
#define GG(a, b, c, d, x, s, ac) a = b + (RL((a + G(b,c,d) + x + ac),s))
#define HH(a, b, c, d, x, s, ac) a = b + (RL((a + H(b,c,d) + x + ac),s))
#define II(a, b, c, d, x, s, ac) a = b + (RL((a + I(b,c,d) + x + ac),s))
static unsigned A,B,C,D,a,b,c,d,i,len,flen[2],x[16]; //i临时变量,len文件长,flen[2]为64位二进制表示的文件初始长度
static char filename[200]; //文件名
static FILE *fp;
typedef struct{
unsigned int A,B,C,D,a,b,c,d,x[16]; //i临时变量,len文件长,flen[2]为64位二进制表示的文件初始长度
}MD5_Stru;
static void _md5(MD5_Stru *pMd5)
{
pMd5->a=pMd5->A,pMd5->b=pMd5->B,pMd5->c=pMd5->C,pMd5->d=pMd5->D;
/**//* Round 1 */
FF (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 0], 7, 0xd76aa478); /**//* 1 */
FF (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 1], 12, 0xe8c7b756); /**//* 2 */
FF (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[ 2], 17, 0x242070db); /**//* 3 */
FF (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 3], 22, 0xc1bdceee); /**//* 4 */
FF (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 4], 7, 0xf57c0faf); /**//* 5 */
FF (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 5], 12, 0x4787c62a); /**//* 6 */
FF (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[ 6], 17, 0xa8304613); /**//* 7 */
FF (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 7], 22, 0xfd469501); /**//* 8 */
FF (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 8], 7, 0x698098d8); /**//* 9 */
FF (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 9], 12, 0x8b44f7af); /**//* 10 */
FF (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[10], 17, 0xffff5bb1); /**//* 11 */
FF (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[11], 22, 0x895cd7be); /**//* 12 */
FF (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[12], 7, 0x6b901122); /**//* 13 */
FF (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[13], 12, 0xfd987193); /**//* 14 */
FF (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[14], 17, 0xa679438e); /**//* 15 */
FF (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[15], 22, 0x49b40821); /**//* 16 */
/**//* Round 2 */
GG (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 1], 5, 0xf61e2562); /**//* 17 */
GG (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 6], 9, 0xc040b340); /**//* 18 */
GG (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[11], 14, 0x265e5a51); /**//* 19 */
GG (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 0], 20, 0xe9b6c7aa); /**//* 20 */
GG (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 5], 5, 0xd62f105d); /**//* 21 */
GG (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[10], 9, 0x02441453); /**//* 22 */
GG (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[15], 14, 0xd8a1e681); /**//* 23 */
GG (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 4], 20, 0xe7d3fbc8); /**//* 24 */
GG (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 9], 5, 0x21e1cde6); /**//* 25 */
GG (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[14], 9, 0xc33707d6); /**//* 26 */
GG (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[ 3], 14, 0xf4d50d87); /**//* 27 */
GG (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 8], 20, 0x455a14ed); /**//* 28 */
GG (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[13], 5, 0xa9e3e905); /**//* 29 */
GG (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 2], 9, 0xfcefa3f8); /**//* 30 */
GG (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[ 7], 14, 0x676f02d9); /**//* 31 */
GG (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[12], 20, 0x8d2a4c8a); /**//* 32 */
/**//* Round 3 */
HH (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 5], 4, 0xfffa3942); /**//* 33 */
HH (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 8], 11, 0x8771f681); /**//* 34 */
HH (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[11], 16, 0x6d9d6122); /**//* 35 */
HH (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[14], 23, 0xfde5380c); /**//* 36 */
HH (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 1], 4, 0xa4beea44); /**//* 37 */
HH (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 4], 11, 0x4bdecfa9); /**//* 38 */
HH (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[ 7], 16, 0xf6bb4b60); /**//* 39 */
HH (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[10], 23, 0xbebfbc70); /**//* 40 */
HH (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[13], 4, 0x289b7ec6); /**//* 41 */
HH (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 0], 11, 0xeaa127fa); /**//* 42 */
HH (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[ 3], 16, 0xd4ef3085); /**//* 43 */
HH (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 6], 23, 0x04881d05); /**//* 44 */
HH (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 9], 4, 0xd9d4d039); /**//* 45 */
HH (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[12], 11, 0xe6db99e5); /**//* 46 */
HH (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[15], 16, 0x1fa27cf8); /**//* 47 */
HH (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 2], 23, 0xc4ac5665); /**//* 48 */
/**//* Round 4 */
II (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 0], 6, 0xf4292244); /**//* 49 */
II (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 7], 10, 0x432aff97); /**//* 50 */
II (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[14], 15, 0xab9423a7); /**//* 51 */
II (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 5], 21, 0xfc93a039); /**//* 52 */
II (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[12], 6, 0x655b59c3); /**//* 53 */
II (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[ 3], 10, 0x8f0ccc92); /**//* 54 */
II (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[10], 15, 0xffeff47d); /**//* 55 */
II (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 1], 21, 0x85845dd1); /**//* 56 */
II (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 8], 6, 0x6fa87e4f); /**//* 57 */
II (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[15], 10, 0xfe2ce6e0); /**//* 58 */
II (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[ 6], 15, 0xa3014314); /**//* 59 */
II (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[13], 21, 0x4e0811a1); /**//* 60 */
II (pMd5->a, pMd5->b, pMd5->c, pMd5->d, pMd5->x[ 4], 6, 0xf7537e82); /**//* 61 */
II (pMd5->d, pMd5->a, pMd5->b, pMd5->c, pMd5->x[11], 10, 0xbd3af235); /**//* 62 */
II (pMd5->c, pMd5->d, pMd5->a, pMd5->b, pMd5->x[ 2], 15, 0x2ad7d2bb); /**//* 63 */
II (pMd5->b, pMd5->c, pMd5->d, pMd5->a, pMd5->x[ 9], 21, 0xeb86d391); /**//* 64 */
pMd5->A += pMd5->a;
pMd5->B += pMd5->b;
pMd5->C += pMd5->c;
pMd5->D += pMd5->d;
}
static void md5(){ //MD5核心算法,供64轮
a=A,b=B,c=C,d=D;
/**//* Round 1 */
FF (a, b, c, d, x[ 0], 7, 0xd76aa478); /**//* 1 */
FF (d, a, b, c, x[ 1], 12, 0xe8c7b756); /**//* 2 */
FF (c, d, a, b, x[ 2], 17, 0x242070db); /**//* 3 */
FF (b, c, d, a, x[ 3], 22, 0xc1bdceee); /**//* 4 */
FF (a, b, c, d, x[ 4], 7, 0xf57c0faf); /**//* 5 */
FF (d, a, b, c, x[ 5], 12, 0x4787c62a); /**//* 6 */
FF (c, d, a, b, x[ 6], 17, 0xa8304613); /**//* 7 */
FF (b, c, d, a, x[ 7], 22, 0xfd469501); /**//* 8 */
FF (a, b, c, d, x[ 8], 7, 0x698098d8); /**//* 9 */
FF (d, a, b, c, x[ 9], 12, 0x8b44f7af); /**//* 10 */
FF (c, d, a, b, x[10], 17, 0xffff5bb1); /**//* 11 */
FF (b, c, d, a, x[11], 22, 0x895cd7be); /**//* 12 */
FF (a, b, c, d, x[12], 7, 0x6b901122); /**//* 13 */
FF (d, a, b, c, x[13], 12, 0xfd987193); /**//* 14 */
FF (c, d, a, b, x[14], 17, 0xa679438e); /**//* 15 */
FF (b, c, d, a, x[15], 22, 0x49b40821); /**//* 16 */
/**//* Round 2 */
GG (a, b, c, d, x[ 1], 5, 0xf61e2562); /**//* 17 */
GG (d, a, b, c, x[ 6], 9, 0xc040b340); /**//* 18 */
GG (c, d, a, b, x[11], 14, 0x265e5a51); /**//* 19 */
GG (b, c, d, a, x[ 0], 20, 0xe9b6c7aa); /**//* 20 */
GG (a, b, c, d, x[ 5], 5, 0xd62f105d); /**//* 21 */
GG (d, a, b, c, x[10], 9, 0x02441453); /**//* 22 */
GG (c, d, a, b, x[15], 14, 0xd8a1e681); /**//* 23 */
GG (b, c, d, a, x[ 4], 20, 0xe7d3fbc8); /**//* 24 */
GG (a, b, c, d, x[ 9], 5, 0x21e1cde6); /**//* 25 */
GG (d, a, b, c, x[14], 9, 0xc33707d6); /**//* 26 */
GG (c, d, a, b, x[ 3], 14, 0xf4d50d87); /**//* 27 */
GG (b, c, d, a, x[ 8], 20, 0x455a14ed); /**//* 28 */
GG (a, b, c, d, x[13], 5, 0xa9e3e905); /**//* 29 */
GG (d, a, b, c, x[ 2], 9, 0xfcefa3f8); /**//* 30 */
GG (c, d, a, b, x[ 7], 14, 0x676f02d9); /**//* 31 */
GG (b, c, d, a, x[12], 20, 0x8d2a4c8a); /**//* 32 */
/**//* Round 3 */
HH (a, b, c, d, x[ 5], 4, 0xfffa3942); /**//* 33 */
HH (d, a, b, c, x[ 8], 11, 0x8771f681); /**//* 34 */
HH (c, d, a, b, x[11], 16, 0x6d9d6122); /**//* 35 */
HH (b, c, d, a, x[14], 23, 0xfde5380c); /**//* 36 */
HH (a, b, c, d, x[ 1], 4, 0xa4beea44); /**//* 37 */
HH (d, a, b, c, x[ 4], 11, 0x4bdecfa9); /**//* 38 */
HH (c, d, a, b, x[ 7], 16, 0xf6bb4b60); /**//* 39 */
HH (b, c, d, a, x[10], 23, 0xbebfbc70); /**//* 40 */
HH (a, b, c, d, x[13], 4, 0x289b7ec6); /**//* 41 */
HH (d, a, b, c, x[ 0], 11, 0xeaa127fa); /**//* 42 */
HH (c, d, a, b, x[ 3], 16, 0xd4ef3085); /**//* 43 */
HH (b, c, d, a, x[ 6], 23, 0x04881d05); /**//* 44 */
HH (a, b, c, d, x[ 9], 4, 0xd9d4d039); /**//* 45 */
HH (d, a, b, c, x[12], 11, 0xe6db99e5); /**//* 46 */
HH (c, d, a, b, x[15], 16, 0x1fa27cf8); /**//* 47 */
HH (b, c, d, a, x[ 2], 23, 0xc4ac5665); /**//* 48 */
/**//* Round 4 */
II (a, b, c, d, x[ 0], 6, 0xf4292244); /**//* 49 */
II (d, a, b, c, x[ 7], 10, 0x432aff97); /**//* 50 */
II (c, d, a, b, x[14], 15, 0xab9423a7); /**//* 51 */
II (b, c, d, a, x[ 5], 21, 0xfc93a039); /**//* 52 */
II (a, b, c, d, x[12], 6, 0x655b59c3); /**//* 53 */
II (d, a, b, c, x[ 3], 10, 0x8f0ccc92); /**//* 54 */
II (c, d, a, b, x[10], 15, 0xffeff47d); /**//* 55 */
II (b, c, d, a, x[ 1], 21, 0x85845dd1); /**//* 56 */
II (a, b, c, d, x[ 8], 6, 0x6fa87e4f); /**//* 57 */
II (d, a, b, c, x[15], 10, 0xfe2ce6e0); /**//* 58 */
II (c, d, a, b, x[ 6], 15, 0xa3014314); /**//* 59 */
II (b, c, d, a, x[13], 21, 0x4e0811a1); /**//* 60 */
II (a, b, c, d, x[ 4], 6, 0xf7537e82); /**//* 61 */
II (d, a, b, c, x[11], 10, 0xbd3af235); /**//* 62 */
II (c, d, a, b, x[ 2], 15, 0x2ad7d2bb); /**//* 63 */
II (b, c, d, a, x[ 9], 21, 0xeb86d391); /**//* 64 */
A += a;
B += b;
C += c;
D += d;
}
int CalcFileMD5(const char* filename,unsigned char md5[16])
{
FILE *fp;
MD5_Stru struMd5={0};
unsigned int flen[2];
unsigned int len,temp;
int i;
if (!(fp=fopen(filename,"rb")))
{
printf("Can not open this file!\n");
return -1;
} //以二进制打开文件
fseek(fp, 0, SEEK_END); //文件指针转到文件末尾
if((len=ftell(fp))==-1)
{
printf("Sorry! Can not calculate files which larger than 2 GB!\n");
fclose(fp);
return -2;
} //ftell函数返回long,最大为2GB,超出返回-1
rewind(fp); //文件指针复位到文件头
struMd5.A=0x67452301,struMd5.B=0xefcdab89,struMd5.C=0x98badcfe,struMd5.D=0x10325476; //初始化链接变量
flen[1]=len/0x20000000; //flen单位是bit
flen[0]=(len%0x20000000)*8;
memset(struMd5.x,0,64); //初始化x数组为0
fread(struMd5.x,4,16,fp); //以4字节为一组,读取16组数
for(i=0;i<len/64;i++){ //循环运算直至文件结束
_md5(&struMd5);
memset(struMd5.x,0,64);
fread(&struMd5.x,4,16,fp);
}
((char*)struMd5.x)[len%64]=128; //文件结束补1,补0操作,128二进制即10000000
if(len%64>55){
_md5(&struMd5);
memset(struMd5.x,0,64);
}
memcpy(struMd5.x+14,flen,8); //文件末尾加入原文件的bit长度
_md5(&struMd5);
fclose(fp);
//printf("MD5 Code:%08x%08x%08x%08x\n",PP(struMd5.A),PP(struMd5.B),PP(struMd5.C),PP(struMd5.D)); //高低位逆反输出
//sprintf(md5Buff,"%08x%08x%08x%08x", PP(struMd5.A), PP(struMd5.B), PP(struMd5.C), PP(struMd5.D))
i = 0;
temp = PP(struMd5.A);
md5[i++] = (temp >> 24 & 0xFF);
md5[i++] = (temp >> 16 & 0xFF);
md5[i++] = (temp >> 8 & 0xFF);
md5[i++] = (temp >> 0 & 0xFF);
temp = PP(struMd5.B);
md5[i++] = (temp >> 24 & 0xFF);
md5[i++] = (temp >> 16 & 0xFF);
md5[i++] = (temp >> 8 & 0xFF);
md5[i++] = (temp >> 0 & 0xFF);
temp = PP(struMd5.C);
md5[i++] = (temp >> 24 & 0xFF);
md5[i++] = (temp >> 16 & 0xFF);
md5[i++] = (temp >> 8 & 0xFF);
md5[i++] = (temp >> 0 & 0xFF);
temp = PP(struMd5.D);
md5[i++] = (temp >> 24 & 0xFF);
md5[i++] = (temp >> 16 & 0xFF);
md5[i++] = (temp >> 8 & 0xFF);
md5[i++] = (temp >> 0 & 0xFF);
return 0;
}
测试文件 test.c
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
static void printf_hexstream(unsigned char *pData, int len, const char* strTag)
{
int i;
char buff[1024 + 2] = { 0 };
int ret = 0;
int pos = 0;
for (i = 0; i<len&&i<512; i++)
{
ret = sprintf(buff + pos, "%0.2X", pData[i]);
pos += ret;
}
if (strTag)
{
printf("\r\n%s %s\r\n", strTag, buff);
}
else
{
printf("\r\n%s\r\n", buff);
}
// printf("\r\n%s:%s\r\n",strTag,buff);
}
extern int CalcFileMD5(const char* filename, unsigned char md5[16]);
void testFileMD5()
{
int rslt;
unsigned char md5[16] = { 0 };
printf("\r\n--------test file MD5-----------\r\n");
rslt = CalcFileMD5("HexEditor.dll",md5);
if (rslt == 0)
{
printf_hexstream(md5, sizeof(md5), 0);
}
else
{
printf("\r\nfailed to call CalcFileMD5()");
}
}
int main(int argc, char *argv[])
{
testFileMD5();
printf("\r\n");
system("PAUSE");
return 0;
}