[整理]MD5加密源码C++

项目里涉及到明文加密，一开始考虑md5加密，上网搜了好久，整合，运行。得出C++源码。现在贡献出来。

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md5.h-code

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#ifndef _MD5_H_
#define _MD5_H_


char* MD5String( char* string );
bool MD5Check( char *md5string, char* string );


#endif //_MD5_H_

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md5.cpp - code

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#include<iostream>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
#include<ctype.h>
#include "md5.h"

typedef unsigned char *POINTER;
typedef unsigned short int UINT2;
typedef unsigned long int UINT4;


#define PROTO_LIST(list) list


#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


#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)))


typedef struct _MD5_CTX
{
    UINT4 state[4];
    UINT4 count[2];
    unsigned char buffer[64];
} MD5_CTX;


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 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); \
    (a) = ROTATE_LEFT ((a), (s)); \
    (a) += (b); \
    }


#define TEST_BLOCK_LEN 1000
#define TEST_BLOCK_COUNT 1000


static void MD5Transform PROTO_LIST ((UINT4 [4], unsigned char [64]));
static void Encode PROTO_LIST ((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST ((UINT4 *, unsigned char *, unsigned int));
static void MD5_memcpy PROTO_LIST ((POINTER, POINTER, unsigned int));
static void MD5_memset PROTO_LIST ((POINTER, int, unsigned int));
static void MD5Init PROTO_LIST ((MD5_CTX *));
static void MD5Update PROTO_LIST ((MD5_CTX *, unsigned char *, unsigned int));
static void MD5Final PROTO_LIST ((unsigned char [16], MD5_CTX *));
static void MDTimeTrial PROTO_LIST ((void));
static void StringAddOne PROTO_LIST ((char *));
static void Encode PROTO_LIST ((unsigned char *, UINT4 *, unsigned int));
static void Decode PROTO_LIST ((UINT4 *, unsigned char *, unsigned int));


static 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;
}


static void MD5Update(
               MD5_CTX *context,        /* context */
               unsigned char *input,    /* input block */
               unsigned int inputLen    /* length of input block */
               )
{
    unsigned int i, index, partLen;


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


    if ((context->count[0] += ((UINT4)inputLen << 3))
        < ((UINT4)inputLen << 3))
        context->count[1]++;
    context->count[1] += ((UINT4)inputLen >> 29);
    
    partLen = 64 - index;


    if (inputLen >= partLen) {
        MD5_memcpy
            ((POINTER)&context->buffer[index], (POINTER)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;
    
    MD5_memcpy
        ((POINTER)&context->buffer[index], (POINTER)&input[i],
        inputLen-i);
}


static void MD5Final(
              unsigned char digest[16], /* message digest */
              MD5_CTX *context          /* 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);
    
    MD5_memset ((POINTER)context, 0, sizeof (*context));
}


static void MD5Transform(
                         UINT4 state[4],
                         unsigned char block[64]
                         )
{
    UINT4 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;
    
    MD5_memset ((POINTER)x, 0, sizeof (x));
}


static void Encode(
                   unsigned char *output,
                   UINT4 *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(
                   UINT4 *output,
                   unsigned char *input,
                   unsigned int len
                   )
{
    unsigned int 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);
}


static void MD5_memcpy(
                       POINTER output,
                       POINTER input,
                       unsigned int len
                       )
{
    unsigned int i;
    
    for (i = 0; i < len; i++)
        output[i] = input[i];
}


static void MD5_memset(
                       POINTER output,
                       int value,
                       unsigned int len
                       )
{
    unsigned int i;
    
    for (i = 0; i < len; i++)
        ((char *)output)[i] = (char)value;
}


char* MD5String( char *string )
{
    MD5_CTX context;
    unsigned char digest[16];
    char output1[33];
    static char output[33]={""};
    unsigned int len = strlen (string);
    int i;


    MD5Init( &context);
    MD5Update( &context, (unsigned char*)string, len );
    MD5Final( digest, &context );
    
    for (i = 0; i < 16; i++)
    {
        sprintf(&(output1[2*i]),"%02x",(unsigned char)digest[i]);
        sprintf(&(output1[2*i+1]),"%02x",(unsigned char)(digest[i]<<4));
    }
    for(i=0;i<32;i++)
    {
        output[i]=output1[i];
    }
    return output;
}


static void StringAddOne( char * orstring )
{
    unsigned int len;
    int i,n;


    len = strlen(orstring);
    n = len - 1;
    for(i = n; i >= 0; i--)
    {
        if(orstring[i]=='9')
        {
            orstring[i] = 'A';
            break;
        }
        else if(orstring[i]=='Z')
        {
            orstring[i]='a';
            break;
        }
        else if(orstring[i]=='z')
        {
            orstring[i]='0';
            continue;
        }
        else
            orstring[i] += 1;
        break;
    }
}


bool MD5Check( char *md5string, char* string )
{
    return strcmp( md5string, MD5String( string ) ) == 0;
}

void main(void){
char *str = MD5String("123456");
std::cout << str << std::endl;
}

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main函数里char *str = MD5String("123456");即对明文123456加密的方法