//MD5加密算法头文件
#pragma once
typedef unsigned char mir_md5_byte_t; /* 8-bit byte */
typedef unsigned int mir_md5_word_t; /* 32-bit word */
typedef struct mir_md5_state_s {
/*存储原始信息的bits数长度,不包括填充的bits，最长为 2^64 bits(因为2^64是一个64位数的最大值)*/
mir_md5_word_t count[2]; /* message length in bits, lsw first */
/*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*/
mir_md5_word_t abcd[4]; /* digest buffer */
/*存放输入的信息的缓冲区，512bits*/
mir_md5_byte_t buf[64]; /* accumulate block */
} mir_md5_state_t;
#define T_MASK ((mir_md5_word_t)~0)
#define T1 (T_MASK ^ 0x28955b87)/* 0xd76aa478 */
#define T2 (T_MASK ^ 0x173848a9)/* 0xe8c7b756 */
#define T3 0x242070db
#define T4 (T_MASK ^ 0x3e423111)/* 0xc1bdceee */
#define T5 (T_MASK ^ 0x0a83f050)/* 0xf57c0faf */
#define T6 0x4787c62a
#define T7 (T_MASK ^ 0x57cfb9ec)/* 0xa8304613 */
#define T8 (T_MASK ^ 0x02b96afe)/* 0xfd469501 */
#define T9 0x698098d8
#define T10 (T_MASK ^ 0x74bb0850)/* 0x8b44f7af */
#define T11 (T_MASK ^ 0x0000a44e)/* 0xffff5bb1 */
#define T12 (T_MASK ^ 0x76a32841)/* 0x895cd7be */
#define T13 0x6b901122
#define T14 (T_MASK ^ 0x02678e6c)/* 0xfd987193 */
#define T15 (T_MASK ^ 0x5986bc71)/* 0xa679438e */
#define T16 0x49b40821
#define T17 (T_MASK ^ 0x09e1da9d)/* 0xf61e2562 */
#define T18 (T_MASK ^ 0x3fbf4cbf)/* 0xc040b340 */
#define T19 0x265e5a51
#define T20 (T_MASK ^ 0x16493855)/* 0xe9b6c7aa */
#define T21 (T_MASK ^ 0x29d0efa2)/* 0xd62f105d */
#define T22 0x02441453
#define T23 (T_MASK ^ 0x275e197e)/* 0xd8a1e681 */
#define T24 (T_MASK ^ 0x182c0437)/* 0xe7d3fbc8 */
#define T25 0x21e1cde6
#define T26 (T_MASK ^ 0x3cc8f829)/* 0xc33707d6 */
#define T27 (T_MASK ^ 0x0b2af278)/* 0xf4d50d87 */
#define T28 0x455a14ed
#define T29 (T_MASK ^ 0x561c16fa)/* 0xa9e3e905 */
#define T30 (T_MASK ^ 0x03105c07)/* 0xfcefa3f8 */
#define T31 0x676f02d9
#define T32 (T_MASK ^ 0x72d5b375)/* 0x8d2a4c8a */
#define T33 (T_MASK ^ 0x0005c6bd)/* 0xfffa3942 */
#define T34 (T_MASK ^ 0x788e097e)/* 0x8771f681 */
#define T35 0x6d9d6122
#define T36 (T_MASK ^ 0x021ac7f3)/* 0xfde5380c */
#define T37 (T_MASK ^ 0x5b4115bb)/* 0xa4beea44 */
#define T38 0x4bdecfa9
#define T39 (T_MASK ^ 0x0944b49f)/* 0xf6bb4b60 */
#define T40 (T_MASK ^ 0x4140438f)/* 0xbebfbc70 */
#define T41 0x289b7ec6
#define T42 (T_MASK ^ 0x155ed805)/* 0xeaa127fa */
#define T43 (T_MASK ^ 0x2b10cf7a)/* 0xd4ef3085 */
#define T44 0x04881d05
#define T45 (T_MASK ^ 0x262b2fc6)/* 0xd9d4d039 */
#define T46 (T_MASK ^ 0x1924661a)/* 0xe6db99e5 */
#define T47 0x1fa27cf8
#define T48 (T_MASK ^ 0x3b53a99a)/* 0xc4ac5665 */
#define T49 (T_MASK ^ 0x0bd6ddbb)/* 0xf4292244 */
#define T50 0x432aff97
#define T51 (T_MASK ^ 0x546bdc58)/* 0xab9423a7 */
#define T52 (T_MASK ^ 0x036c5fc6)/* 0xfc93a039 */
#define T53 0x655b59c3
#define T54 (T_MASK ^ 0x70f3336d)/* 0x8f0ccc92 */
#define T55 (T_MASK ^ 0x00100b82)/* 0xffeff47d */
#define T56 (T_MASK ^ 0x7a7ba22e)/* 0x85845dd1 */
#define T57 0x6fa87e4f
#define T58 (T_MASK ^ 0x01d3191f)/* 0xfe2ce6e0 */
#define T59 (T_MASK ^ 0x5cfebceb)/* 0xa3014314 */
#define T60 0x4e0811a1
#define T61 (T_MASK ^ 0x08ac817d)/* 0xf7537e82 */
#define T62 (T_MASK ^ 0x42c50dca)/* 0xbd3af235 */
#define T63 0x2ad7d2bb
#define T64 (T_MASK ^ 0x14792c6e)/* 0xeb86d391 */
#define ROTATE_LEFT(x, n) (((x) << (n)) | ((x) >> (32 - (n))))
//第一轮（函数末尾分号加多了是没有关系的）
#define F(x, y, z) (((x) & (y)) | (~(x) & (z)))
#define SET1(a, b, c, d, k, s, Ti)\
t = a + F(b,c,d) + X[k] + Ti;\
a = ROTATE_LEFT(t, s) + b;
//第二轮（函数末尾分号加多了是没有关系的）
#define G(x, y, z) (((x) & (z)) | ((y) & ~(z)))
#define SET2(a, b, c, d, k, s, Ti)\
t = a + G(b,c,d) + X[k] + Ti;\
a = ROTATE_LEFT(t, s) + b;
//第三轮（函数末尾分号加多了是没有关系的）
#define H(x, y, z) ((x) ^ (y) ^ (z))
#define SET3(a, b, c, d, k, s, Ti)\
t = a + H(b,c,d) + X[k] + Ti;\
a = ROTATE_LEFT(t, s) + b;
//第四轮（函数末尾分号加多了是没有关系的）
#define I(x, y, z) ((y) ^ ((x) | ~(z)))
#define SET4(a, b, c, d, k, s, Ti)\
t = a + I(b,c,d) + X[k] + Ti;\
a = ROTATE_LEFT(t, s) + b;
class CMd5
{
public:
CMd5(void);
~CMd5(void);
private:
void md5_init(mir_md5_state_t *pms);
void md5_append(mir_md5_state_t *pms, const mir_md5_byte_t *data, int nbytes);
void md5_finish(mir_md5_state_t *pms, mir_md5_byte_t digest[16]);
void md5_process(mir_md5_state_t *pms, const mir_md5_byte_t *data /*[64]*/);
public:
/*接口函数*/
void md5_hash_string(const mir_md5_byte_t *data/*要加密的数据*/
, int len/*要加密数据长度-用Strlen((char*)data)来获取*/
, mir_md5_byte_t digest[16]/*加密后的数据-为固定的16字节*/
);
};
//MD5加密算法源文件
///////////////////////////////////////////////////////////////////////
// //在多字节字符集情况下的使用列子（把a进行MD5加密） ///
// #include "Md5.h" ///
// CMd5 md5; ///
// char yang[32] = _T("a"); ///
// unsigned char zhi[17];//16字节放MD5数据最后一个字节放结束符号 ///
// memset(zhi,NULL,sizeof(zhi)); ///
// md5.md5_hash_string((mir_md5_byte_t*)yang,strlen(yang),zhi); ///
// //这里的Strlen是计算从起始地址到结束符的字节数故可以>=<Sizeof ///
///////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "Md5.h"
CMd5::CMd5(void)
{
}
CMd5::~CMd5(void)
{
}
//初始化MD5加密结构
void CMd5::md5_init( mir_md5_state_t *pms )
{
/*将初始的有效信息的长度设成0*/
pms->count[0] = pms->count[1] = 0;
/*初始化链接变量，算法要求必须初始化为这些值*/
pms->abcd[0] = 0x67452301;
pms->abcd[1] = T_MASK ^ 0x10325476;//0xefcdab89
pms->abcd[2] = T_MASK ^ 0x67452301;//0x98badcfe
pms->abcd[3] = 0x10325476;
}
//进行MD5加密
void CMd5::md5_append( mir_md5_state_t *pms, const mir_md5_byte_t *data, int nbytes )
{
const mir_md5_byte_t *p = data;
int left = nbytes;
int offset = (pms->count[0] >> 3) & 63;
mir_md5_word_t nbits = (mir_md5_word_t)(nbytes << 3);
if (nbytes <= 0)
{
return;
}
/* Update the message length. */
pms->count[1] += nbytes >> 29;
pms->count[0] += nbits;
if (pms->count[0] < nbits)
{
pms->count[1]++;
}
/* Process an initial partial block. */
if (offset)
{
int copy = (offset + nbytes > 64 ? 64 - offset : nbytes);
memcpy(pms->buf + offset, p, copy);
if (offset + copy < 64)
{
return;
}
p += copy;
left -= copy;
md5_process(pms, pms->buf);
}
/* Process full blocks. */
for (; left >= 64; p += 64, left -= 64)
{
md5_process(pms, p);
}
/* Process a final partial block. */
if (left)
{
memcpy(pms->buf, p, left);
}
}
//得到MD5加密后的结果
void CMd5::md5_finish( mir_md5_state_t *pms, mir_md5_byte_t digest[16] )
{
static const mir_md5_byte_t pad[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
};
mir_md5_byte_t data[8];
int i;
/* Save the length before padding. */
for (i = 0; i < 8; ++i)
{
data[i] = (mir_md5_byte_t)(pms->count[i >> 2] >> ((i & 3) << 3));
}
/* Pad to 56 bytes mod 64. */
md5_append(pms, pad, ((55 - (pms->count[0] >> 3)) & 63) + 1);
/* Append the length. */
md5_append(pms, data, 8);
for (i = 0; i < 16; ++i)
{
digest[i] = (mir_md5_byte_t)(pms->abcd[i >> 2] >> ((i & 3) << 3));
}
}
//进行一次处理（一次包括4轮回）
void CMd5::md5_process( mir_md5_state_t *pms, const mir_md5_byte_t *data /*[64]*/ )
{
mir_md5_word_t a = pms->abcd[0];
mir_md5_word_t b = pms->abcd[1];
mir_md5_word_t c = pms->abcd[2];
mir_md5_word_t d = pms->abcd[3];
mir_md5_word_t t;
/* Define storage for little-endian or both types of CPUs. */
mir_md5_word_t xbuf[16];
const mir_md5_word_t *X;
/*
* Determine dynamically whether this is a big-endian or
* little-endian machine, since we can use a more efficient
* algorithm on the latter.
*/
static const int w = 1;
if (*((const mir_md5_byte_t *)&w)) /* dynamic little-endian */
{
/*
* On little-endian machines, we can process properly aligned
* data without copying it.
*/
if (!((data - (const mir_md5_byte_t *)0) & 3))
{
/* data are properly aligned */
X = (const mir_md5_word_t *)data;
}
else
{
/* not aligned */
memcpy(xbuf, data, 64);
X = xbuf;
}
}
else /* dynamic big-endian */
{
/*
* On big-endian machines, we must arrange the bytes in the
* right order.
*/
const mir_md5_byte_t *xp = data;
int i;
X = xbuf; /* (dynamic only) */
for (i = 0; i < 16; ++i, xp += 4)
{
xbuf[i] = xp[0] + (xp[1] << 8) + (xp[2] << 16) + (xp[3] << 24);
}
}
/* 第一轮 */
/* Let [abcd k s i] denote the operation
a = b + ((a + F(b,c,d) + X[k] + T[i]) <<< s). */
/* Do the following 16 operations. */
SET1(a, b, c, d, 0, 7, T1);
SET1(d, a, b, c, 1, 12, T2);
SET1(c, d, a, b, 2, 17, T3);
SET1(b, c, d, a, 3, 22, T4);
SET1(a, b, c, d, 4, 7, T5);
SET1(d, a, b, c, 5, 12, T6);
SET1(c, d, a, b, 6, 17, T7);
SET1(b, c, d, a, 7, 22, T8);
SET1(a, b, c, d, 8, 7, T9);
SET1(d, a, b, c, 9, 12, T10);
SET1(c, d, a, b, 10, 17, T11);
SET1(b, c, d, a, 11, 22, T12);
SET1(a, b, c, d, 12, 7, T13);
SET1(d, a, b, c, 13, 12, T14);
SET1(c, d, a, b, 14, 17, T15);
SET1(b, c, d, a, 15, 22, T16);
/* 第二轮 */
/* Let [abcd k s i] denote the operation
a = b + ((a + G(b,c,d) + X[k] + T[i]) <<< s). */
/* Do the following 16 operations. */
SET2(a, b, c, d, 1, 5, T17);
SET2(d, a, b, c, 6, 9, T18);
SET2(c, d, a, b, 11, 14, T19);
SET2(b, c, d, a, 0, 20, T20);
SET2(a, b, c, d, 5, 5, T21);
SET2(d, a, b, c, 10, 9, T22);
SET2(c, d, a, b, 15, 14, T23);
SET2(b, c, d, a, 4, 20, T24);
SET2(a, b, c, d, 9, 5, T25);
SET2(d, a, b, c, 14, 9, T26);
SET2(c, d, a, b, 3, 14, T27);
SET2(b, c, d, a, 8, 20, T28);
SET2(a, b, c, d, 13, 5, T29);
SET2(d, a, b, c, 2, 9, T30);
SET2(c, d, a, b, 7, 14, T31);
SET2(b, c, d, a, 12, 20, T32);
/* 第三轮 */
/* Let [abcd k s t] denote the operation
a = b + ((a + H(b,c,d) + X[k] + T[i]) <<< s). */
/* Do the following 16 operations. */
SET3(a, b, c, d, 5, 4, T33);
SET3(d, a, b, c, 8, 11, T34);
SET3(c, d, a, b, 11, 16, T35);
SET3(b, c, d, a, 14, 23, T36);
SET3(a, b, c, d, 1, 4, T37);
SET3(d, a, b, c, 4, 11, T38);
SET3(c, d, a, b, 7, 16, T39);
SET3(b, c, d, a, 10, 23, T40);
SET3(a, b, c, d, 13, 4, T41);
SET3(d, a, b, c, 0, 11, T42);
SET3(c, d, a, b, 3, 16, T43);
SET3(b, c, d, a, 6, 23, T44);
SET3(a, b, c, d, 9, 4, T45);
SET3(d, a, b, c, 12, 11, T46);
SET3(c, d, a, b, 15, 16, T47);
SET3(b, c, d, a, 2, 23, T48);
/* 第四轮 */
/* Let [abcd k s t] denote the operation
a = b + ((a + I(b,c,d) + X[k] + T[i]) <<< s). */
/* Do the following 16 operations. */
SET4(a, b, c, d, 0, 6, T49);
SET4(d, a, b, c, 7, 10, T50);
SET4(c, d, a, b, 14, 15, T51);
SET4(b, c, d, a, 5, 21, T52);
SET4(a, b, c, d, 12, 6, T53);
SET4(d, a, b, c, 3, 10, T54);
SET4(c, d, a, b, 10, 15, T55);
SET4(b, c, d, a, 1, 21, T56);
SET4(a, b, c, d, 8, 6, T57);
SET4(d, a, b, c, 15, 10, T58);
SET4(c, d, a, b, 6, 15, T59);
SET4(b, c, d, a, 13, 21, T60);
SET4(a, b, c, d, 4, 6, T61);
SET4(d, a, b, c, 11, 10, T62);
SET4(c, d, a, b, 2, 15, T63);
SET4(b, c, d, a, 9, 21, T64);
/* Then perform the following additions. (That is increment each
of the four registers by the value it had before this block
was started.) */
pms->abcd[0] += a;
pms->abcd[1] += b;
pms->abcd[2] += c;
pms->abcd[3] += d;
}
/*对外的接口函数*/
void CMd5::md5_hash_string( const mir_md5_byte_t *data/*要加密的数据*/
,int len/*要加密数据长度-用Strlen((char*)data)来获取*/
,mir_md5_byte_t digest[16]/*加密后的数据-为固定的16字节*/
)
{
mir_md5_state_t state;
md5_init(&state);
md5_append(&state, data, len);
md5_finish(&state, digest);
}