cmd5加密源代码（cmd加密文件）

今天给各位分享cmd5加密源代码的知识，其中也会对cmd加密文件进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！

本文目录一览：

• 1、求一个简单的md5加密程序C或C++代码
• 2、c语言写出的不标准md5 31位加密代码，想用php重现这个错误（错的一样，好导入数据）
• 3、C语言 MD5加密
• 4、C语言下对字符串进行MD5加密
• 5、如何对字符串进行MD5加密,用C语言实现,给出源代码和加密函数
• 6、急求 MD5的加密解密算法，用C++实现的源代码 高分答谢

求一个简单的md5加密程序C或C++代码

C语言实现MD5算法

#includestdio.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) (x24)|((x8)0xff0000)|((x8)0xff00)|(x24) //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))

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

char filename[200]; //文件名

FILE *fp;

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;

}

main(){

while(1){

printf("Input file:");

gets(filename); //用get函数,避免scanf以空格分割数据,

if (filename[0]==34) filename[strlen(filename)-1]=0,strcpy(filename,filename+1); //支持文件拖曳,但会多出双引号,这里是处理多余的双引号

if (!strcmp(filename,"exit")) exit(0); //输入exit退出

if (!(fp=fopen(filename,"rb"))) {printf("Can not open this file!\n");continue;} //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);continue;} //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

A=0x67452301,B=0xefcdab89,C=0x98badcfe,D=0x10325476; //初始化链接变量

flen[1]=len/0x20000000; //flen单位是bit

flen[0]=(len%0x20000000)*8;

memset(x,0,64); //初始化x数组为0

fread(x,4,16,fp); //以4字节为一组,读取16组数据

for(i=0;ilen/64;i++){ //循环运算直至文件结束

md5();

memset(x,0,64);

fread(x,4,16,fp);

}

((char*)x)[len%64]=128; //文件结束补1,补0操作,128二进制即10000000

if(len%6455) md5(),memset(x,0,64);

memcpy(x+14,flen,8); //文件末尾加入原文件的bit长度

md5();

fclose(fp);

printf("MD5 Code:%08x%08x%08x%08x\n",PP(A),PP(B),PP(C),PP(D)); //高低位逆反输出

}

}

c语言写出的不标准md5 31位加密代码，想用php重现这个错误（错的一样，好导入数据）

按照你所说的，你的老网站里那个错误的md5加密出来的密码不一定都是31位，有的肯定比31位还少。

下面这个php函数的作用就是计算一个原始密码对应的md5字符串，并且是按照你那个asp.net的错误方法计算的，你在新站点中使用这个php函数来计算用户输入的密码，得到的结果就和老网站asp.net那个错误的一样了——有的密码是31位，有的小于31

?php

function mymd5($str)

{

$psw = md5($str);//这是标准的32个字符的md5

$ret = '';

for( $i=0; $istrlen($psw); $i+=2 )

{

$sub = substr($psw, $i, 2);

$ret .= ($sub[0]=='0'?$sub[1]:$sub);

}

return $ret;

}

?

C语言 MD5加密

main.cpp

#include stdio.h

#include string.h

#include stdlib.h

#include "md5.c"

int main(int argc, char* argv[])

{

int i;

unsigned char encrypt[] = "admin";//21232f297a57a5a743894a0e4a801fc3

unsigned char decrypt[16];

MD5_CTX md5;

MD5Init(md5);

MD5Update(md5, encrypt, strlen((char*)encrypt));

MD5Final(md5, decrypt);

printf("加密前:%s\n加密后:", encrypt);

for (i = 0; i 16; i++)

{

printf("%02x", decrypt[i]);

}

getchar();

return 0;

}

md5.c

#include memory.h

#include "md5.h"

unsigned char PADDING[] = { 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 };

void MD5Init(MD5_CTX* context)

{

    context-count[0] = 0;

    context-count[1] = 0;

    context-state[0] = 0x67452301;

    context-state[1] = 0xEFCDAB89;

    context-state[2] = 0x98BADCFE;

    context-state[3] = 0x10325476;

}

void MD5Update(MD5_CTX* context, unsigned char* input, unsigned int inputlen)

{

    unsigned int i = 0, index = 0, partlen = 0;

    index = (context-count[0] 3) 0x3F;

    partlen = 64 - index;

    context-count[0] += inputlen 3;

    if (context-count[0] (inputlen 3))

        context-count[1]++;

    context-count[1] += inputlen 29;

    if (inputlen = partlen)

    {

        memcpy(context-buffer[index], input, partlen);

        MD5Transform(context-state, context-buffer);

        for (i = partlen; i + 64 = inputlen; i += 64)

            MD5Transform(context-state, input[i]);

        index = 0;

    }

    else

    {

        i = 0;

    }

    memcpy(context-buffer[index], input[i], inputlen - i);

}

void MD5Final(MD5_CTX* context, unsigned char digest[16])

{

    unsigned int index = 0, padlen = 0;

    unsigned char bits[8];

    index = (context-count[0] 3) 0x3F;

    padlen = (index 56) ? (56 - index) : (120 - index);

    MD5Encode(bits, context-count, 8);

    MD5Update(context, PADDING, padlen);

    MD5Update(context, bits, 8);

    MD5Encode(digest, context-state, 16);

}

void MD5Encode(unsigned char* output, unsigned int* input, unsigned int len)

{

    unsigned int i = 0, j = 0;

    while (j len)

    {

        output[j] = input[i] 0xFF;

        output[j + 1] = (input[i] 8) 0xFF;

        output[j + 2] = (input[i] 16) 0xFF;

        output[j + 3] = (input[i] 24) 0xFF;

        i++;

        j += 4;

    }

}

void MD5Decode(unsigned int* output, unsigned char* input, unsigned int len)

{

    unsigned int i = 0, j = 0;

    while (j len)

    {

        output[i] = (input[j]) |

            (input[j + 1] 8) |

            (input[j + 2] 16) |

            (input[j + 3] 24);

        i++;

        j += 4;

    }

}

void MD5Transform(unsigned int state[4], unsigned char block[64])

{

    unsigned int a = state[0];

    unsigned int b = state[1];

    unsigned int c = state[2];

    unsigned int d = state[3];

    unsigned int x[64];

    MD5Decode(x, block, 64);

    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, 0x2441453); /* 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, 0x4881d05); /* 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 */

    state[0] += a;

    state[1] += b;

    state[2] += c;

    state[3] += d;

}

md5.h

#ifndef MD5_H

#define MD5_H

typedef struct

{

    unsigned int count[2];

    unsigned int state[4];

    unsigned char buffer[64];

}MD5_CTX;

#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 ROTATE_LEFT(x,n) ((x n) | (x (32-n)))

#define FF(a,b,c,d,x,s,ac) \

          { \

          a += F(b,c,d) + x + ac; \

          a = ROTATE_LEFT(a,s); \

          a += b; \

          }

#define GG(a,b,c,d,x,s,ac) \

          { \

          a += G(b,c,d) + x + ac; \

          a = ROTATE_LEFT(a,s); \

          a += b; \

          }

#define HH(a,b,c,d,x,s,ac) \

          { \

          a += H(b,c,d) + x + ac; \

          a = ROTATE_LEFT(a,s); \

          a += b; \

          }

#define II(a,b,c,d,x,s,ac) \

          { \

          a += I(b,c,d) + x + ac; \

          a = ROTATE_LEFT(a,s); \

          a += b; \

          }

void MD5Init(MD5_CTX* context);

void MD5Update(MD5_CTX* context, unsigned char* input, unsigned int inputlen);

void MD5Final(MD5_CTX* context, unsigned char digest[16]);

void MD5Transform(unsigned int state[4], unsigned char block[64]);

void MD5Encode(unsigned char* output, unsigned int* input, unsigned int len);

void MD5Decode(unsigned int* output, unsigned char* input, unsigned int len);

#endif

C语言下对字符串进行MD5加密

怎么发给你？

md5.h

//===================================================

#ifndef MD5_H

#define MD5_H

#include string

#include fstream

/* Type define */

typedef unsigned char byte;

typedef unsigned int uint32;

using std::string;

using std::ifstream;

/* MD5 declaration. */

class MD5 {

public:

MD5();

MD5(const void* input, size_t length);

MD5(const string str);

MD5(ifstream in);

void update(const void* input, size_t length);

void update(const string str);

void update(ifstream in);

const byte* digest();

string toString();

void reset();

private:

void update(const byte* input, size_t length);

void final();

void transform(const byte block[64]);

void encode(const uint32* input, byte* output, size_t length);

void decode(const byte* input, uint32* output, size_t length);

string bytesToHexString(const byte* input, size_t length);

/* class uncopyable */

MD5(const MD5);

MD5 operator=(const MD5);

private:

uint32 _state[4]; /* state (ABCD) */

uint32 _count[2]; /* number of bits, modulo 2^64 (low-order word first) */

byte _buffer[64]; /* input buffer */

byte _digest[16]; /* message digest */

bool _finished; /* calculate finished ? */

static const byte PADDING[64]; /* padding for calculate */

static const char HEX[16];

enum { BUFFER_SIZE = 1024 };

};

#endif /*MD5_H*/

md5.cpp

//==============================================

#include "md5.h"

using namespace std;

/* Constants for MD5Transform routine. */

#define S11 7

#define S12 12

#define S13 17

#define S14 22

#define S21 5

#define S22 9

#define S23 14

#define S24 20

#define S31 4

#define S32 11

#define S33 16

#define S34 23

#define S41 6

#define S42 10

#define S43 15

#define S44 21

/* F, G, H and I are basic MD5 functions.

*/

#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) + ac; \

(a) = ROTATE_LEFT ((a), (s)); \

(a) += (b); \

}

#define GG(a, b, c, d, x, s, ac) { \

(a) += G ((b), (c), (d)) + (x) + ac; \

(a) = ROTATE_LEFT ((a), (s)); \

(a) += (b); \

}

#define HH(a, b, c, d, x, s, ac) { \

(a) += H ((b), (c), (d)) + (x) + ac; \

(a) = ROTATE_LEFT ((a), (s)); \

(a) += (b); \

}

#define II(a, b, c, d, x, s, ac) { \

(a) += I ((b), (c), (d)) + (x) + ac; \

(a) = ROTATE_LEFT ((a), (s)); \

(a) += (b); \

}

const byte MD5::PADDING[64] = { 0x80 };

const char MD5::HEX[16] = {

'0', '1', '2', '3',

'4', '5', '6', '7',

'8', '9', 'a', 'b',

'c', 'd', 'e', 'f'

};

/* Default construct. */

MD5::MD5() {

reset();

}

/* Construct a MD5 object with a input buffer. */

MD5::MD5(const void* input, size_t length) {

reset();

update(input, length);

}

/* Construct a MD5 object with a string. */

MD5::MD5(const string str) {

reset();

update(str);

}

/* Construct a MD5 object with a file. */

MD5::MD5(ifstream in) {

reset();

update(in);

}

/* Return the message-digest */

const byte* MD5::digest() {

if (!_finished) {

_finished = true;

final();

}

return _digest;

}

/* Reset the calculate state */

void MD5::reset() {

_finished = false;

/* reset number of bits. */

_count[0] = _count[1] = 0;

/* Load magic initialization constants. */

_state[0] = 0x67452301;

_state[1] = 0xefcdab89;

_state[2] = 0x98badcfe;

_state[3] = 0x10325476;

}

/* Updating the context with a input buffer. */

void MD5::update(const void* input, size_t length) {

update((const byte*)input, length);

}

/* Updating the context with a string. */

void MD5::update(const string str) {

update((const byte*)str.c_str(), str.length());

}

/* Updating the context with a file. */

void MD5::update(ifstream in) {

if (!in) {

return;

}

std::streamsize length;

char buffer[BUFFER_SIZE];

while (!in.eof()) {

in.read(buffer, BUFFER_SIZE);

length = in.gcount();

if (length 0) {

update(buffer, length);

}

}

in.close();

}

/* MD5 block update operation. Continues an MD5 message-digest

operation, processing another message block, and updating the

context.

*/

void MD5::update(const byte* input, size_t length) {

uint32 i, index, partLen;

_finished = false;

/* Compute number of bytes mod 64 */

index = (uint32)((_count[0] 3) 0x3f);

/* update number of bits */

if ((_count[0] += ((uint32)length 3)) ((uint32)length 3)) {

++_count[1];

}

_count[1] += ((uint32)length 29);

partLen = 64 - index;

/* transform as many times as possible. */

if (length = partLen) {

memcpy(_buffer[index], input, partLen);

transform(_buffer);

for (i = partLen; i + 63 length; i += 64) {

transform(input[i]);

}

index = 0;

} else {

i = 0;

}

/* Buffer remaining input */

memcpy(_buffer[index], input[i], length - i);

}

/* MD5 finalization. Ends an MD5 message-_digest operation, writing the

the message _digest and zeroizing the context.

*/

void MD5::final() {

byte bits[8];

uint32 oldState[4];

uint32 oldCount[2];

uint32 index, padLen;

/* Save current state and count. */

memcpy(oldState, _state, 16);

memcpy(oldCount, _count, 8);

/* Save number of bits */

encode(_count, bits, 8);

/* Pad out to 56 mod 64. */

index = (uint32)((_count[0] 3) 0x3f);

padLen = (index 56) ? (56 - index) : (120 - index);

update(PADDING, padLen);

/* Append length (before padding) */

update(bits, 8);

/* Store state in digest */

encode(_state, _digest, 16);

/* Restore current state and count. */

memcpy(_state, oldState, 16);

memcpy(_count, oldCount, 8);

}

/* MD5 basic transformation. Transforms _state based on block. */

void MD5::transform(const byte block[64]) {

uint32 a = _state[0], b = _state[1], c = _state[2], d = _state[3], x[16];

decode(block, x, 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 */

_state[0] += a;

_state[1] += b;

_state[2] += c;

_state[3] += d;

}

/* Encodes input (ulong) into output (byte). Assumes length is

a multiple of 4.

*/

void MD5::encode(const uint32* input, byte* output, size_t length) {

for (size_t i = 0, j = 0; j length; ++i, j += 4) {

output[j]= (byte)(input[i] 0xff);

output[j + 1] = (byte)((input[i] 8) 0xff);

output[j + 2] = (byte)((input[i] 16) 0xff);

output[j + 3] = (byte)((input[i] 24) 0xff);

}

}

/* Decodes input (byte) into output (ulong). Assumes length is

a multiple of 4.

*/

void MD5::decode(const byte* input, uint32* output, size_t length) {

for (size_t i = 0, j = 0; j length; ++i, j += 4) {

output[i] = ((uint32)input[j]) | (((uint32)input[j + 1]) 8) |

(((uint32)input[j + 2]) 16) | (((uint32)input[j + 3]) 24);

}

}

/* Convert byte array to hex string. */

string MD5::bytesToHexString(const byte* input, size_t length) {

string str;

str.reserve(length 1);

for (size_t i = 0; i length; ++i) {

int t = input[i];

int a = t / 16;

int b = t % 16;

str.append(1, HEX[a]);

str.append(1, HEX[b]);

}

return str;

}

/* Convert digest to string value */

string MD5::toString() {

return bytesToHexString(digest(), 16);

}

如何对字符串进行MD5加密,用C语言实现,给出源代码和加密函数

/*四个32bits数,用于存放最终计算得到的消息摘要.当消息长度512bits时,也用于存放每个512bits的中间结果*/ UINT4 state[4]; /*存储原始信息的bits数长度,不包括填充的bits,最长为2^64 bits*/ UINT4 count[2]; /*存放输入的信息的缓冲区,512bits*/ unsigned char buffer[64];} MD5_CTX;static void MD5Transform(UINT4[4], unsigned char[64]); static void Encode(unsigned char *, UINT4 *, unsigned int); static void Decode(UINT4 *, unsigned char *, unsigned int);/*用于bits填充的缓冲区,当欲加密的信息的bits数被512除其余数为448时,需要填充的bits的最大值为512=64*8*/ static unsigned char 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};/*接下来的这几个宏定义是md5算法规定的,就是对信息进行md5加密都要做的运算*/ #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 ROTATE_LEFT(x, n) (((x) (n)) | ((x) (32-(n)))) #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);\

急求 MD5的加密解密算法，用C++实现的源代码 高分答谢

要代码，还是要相关的解释资料？

---------------------------------

要代码的话：

两个文件：

--------------------------

1. md5.h：

#pragma once

typedef unsigned long int UINT32;

typedef unsigned short int UINT16;

/* MD5 context. */

typedef struct {

UINT32 state[4]; /* state (ABCD) */

UINT32 count[2]; /* number of bits, modulo 2^64 (lsb first) */

unsigned char buffer[64]; /* input buffer */

} MD5_CTX;

void MD5Init (MD5_CTX *);

void MD5Update (MD5_CTX *, unsigned char *, unsigned int);

void MD5Final (unsigned char [16], MD5_CTX *);

--------------------------

2. md5.cpp：

#include "md5.h"

#include "memory.h"

#define S11 7

#define S12 12

#define S13 17

#define S14 22

#define S21 5

#define S22 9

#define S23 14

#define S24 20

#define S31 4

#define S32 11

#define S33 16

#define S34 23

#define S41 6

#define S42 10

#define S43 15

#define S44 21

static void MD5Transform (UINT32 a[4], unsigned char b[64]);

static void Encode (unsigned char *, UINT32 *, unsigned int);

static void Decode (UINT32 *, unsigned char *, unsigned int);

static unsigned char 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

};

#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 ROTATE_LEFT(x, n) (((x) (n)) | ((x) (32-(n))))

#define FF(a, b, c, d, x, s, ac) { \

(a) += F ((b), (c), (d)) + (x) + (UINT32)(ac); \

(a) = ROTATE_LEFT ((a), (s)); \

(a) += (b); \

}

#define GG(a, b, c, d, x, s, ac) { \

(a) += G ((b), (c), (d)) + (x) + (UINT32)(ac); \

(a) = ROTATE_LEFT ((a), (s)); \

(a) += (b); \

}

#define HH(a, b, c, d, x, s, ac) { \

(a) += H ((b), (c), (d)) + (x) + (UINT32)(ac); \

(a) = ROTATE_LEFT ((a), (s)); \

(a) += (b); \

}

#define II(a, b, c, d, x, s, ac) { \

(a) += I ((b), (c), (d)) + (x) + (UINT32)(ac); \

(a) = ROTATE_LEFT ((a), (s)); \

(a) += (b); \

}

void MD5Init (MD5_CTX *context)

{

context-count[0] = context-count[1] = 0;

context-state[0] = 0x67452301;

context-state[1] = 0xefcdab89;

context-state[2] = 0x98badcfe;

context-state[3] = 0x10325476;

}

void MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen)

{

unsigned int i, index, partLen;

index = (unsigned int)((context-count[0] 3) 0x3F);

if ((context-count[0] += ((UINT32)inputLen 3))

((UINT32)inputLen 3))

context-count[1]++;

context-count[1] += ((UINT32)inputLen 29);

partLen = 64 - index;

if (inputLen = partLen) {

memcpy((unsigned char *)context-buffer[index], (unsigned char *)input, partLen);

MD5Transform (context-state, context-buffer);

for (i = partLen; i + 63 inputLen; i += 64)

MD5Transform (context-state, input[i]);

index = 0;

}

else

i = 0;

memcpy((unsigned char *)context-buffer[index], (unsigned char *)input[i],

inputLen-i);

}

void MD5Final (unsigned char digest[16], MD5_CTX * context)

{

unsigned char bits[8];

unsigned int index, padLen;

Encode (bits, context-count, 8);

index = (unsigned int)((context-count[0] 3) 0x3f);

padLen = (index 56) ? (56 - index) : (120 - index);

MD5Update (context, PADDING, padLen);

MD5Update (context, bits, 8);

Encode (digest, context-state, 16);

memset ((unsigned char *)context, 0, sizeof (*context));

}

static void MD5Transform (UINT32 state[4], unsigned char block[64])

{

UINT32 a = state[0], b = state[1], c = state[2], d = state[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 */

state[0] += a;

state[1] += b;

state[2] += c;

state[3] += d;

memset ((unsigned char *)x, 0, sizeof (x));

}

static void Encode (unsigned char *output, UINT32 *input, unsigned int len)

{

unsigned int i, j;

for (i = 0, j = 0; j len; i++, j += 4) {

output[j] = (unsigned char)(input[i] 0xff);

output[j+1] = (unsigned char)((input[i] 8) 0xff);

output[j+2] = (unsigned char)((input[i] 16) 0xff);

output[j+3] = (unsigned char)((input[i] 24) 0xff);

}

}

static void Decode (UINT32 *output, unsigned char *input, unsigned int len)

{

unsigned int i, j;

for (i = 0, j = 0; j len; i++, j += 4)

output[i] = ((UINT32)input[j]) | (((UINT32)input[j+1]) 8) |

(((UINT32)input[j+2]) 16) | (((UINT32)input[j+3]) 24);

}

--------------------------

就这两个文件。使用的时候把它们加入工程或者makefile，调用时包含md5.h即可，给个简单的例子，输入一个字符串然后计算它的md5值并输出，在VC6.0和GCC4.4下测试通过：

#include stdio.h

#include string.h

#include "md5.h"

int main ()

{

char tmp[128];

unsigned char digest[16];

MD5_CTX context;

scanf("%s",tmp);

MD5Init (context);

MD5Update (context, (unsigned char*)tmp, strlen(tmp));

MD5Final (digest,context);

printf("MD5Value:");

for(int i=0; i16; ++i)

{

printf("%02X",digest[i]);

}

printf("\n");

return 0;

}

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