最近看了下md5的原理，自己忍不住也写了个，发现结果老是不正确，也不知道哪里错了
#include "stdafx.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
UCHAR 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
};
ULONG A = 0x67452301, B = 0xefcdab89, C = 0x98badcfe, D = 0x10325476;
inline ULONG F(ULONG X,ULONG Y,ULONG Z)
{
return (X&Y)|((~X)&Z);
}
inline ULONG G(ULONG X,ULONG Y,ULONG Z)
{
return (X&Z)|(Y&(~Z)) ;
}
inline ULONG H(ULONG X,ULONG Y,ULONG Z)
{
return X^Y^Z;
}
inline ULONG I(ULONG X,ULONG Y,ULONG Z)
{
return Y^(X|(~Z));
}
inline void FF(ULONG &a, ULONG b, ULONG c, ULONG d, ULONG Mj, ULONG s, ULONG ti)
{
a += F(b, c, d) + Mj + ti;
a = b + ((a << s) | (a >> (32 - s)));
}
inline void GG(ULONG &a, ULONG b, ULONG c, ULONG d, ULONG Mj, ULONG s, ULONG ti)
{
a += G(b, c, d) + Mj + ti;
a = b + ((a << s) | (a >> (32 - s)));
}
inline void HH(ULONG &a, ULONG b, ULONG c, ULONG d, ULONG Mj, ULONG s, ULONG ti)
{
a += H(b, c, d) + Mj + ti;
a = b + ((a << s) | (a >> (32 - s)));
}
inline void II(ULONG &a, ULONG b, ULONG c, ULONG d, ULONG Mj, ULONG s, ULONG ti)
{
a += I(b, c, d) + Mj + ti;
a = b + ((a << s) | (a >> (32 - s)));
}
void TransForm(UCHAR uchBlock[64], ULONG &A, ULONG &B, ULONG &C, ULONG &D)
{
ULONG Mj[16];
ULONG a = A, b = B, c = C, d = D;
//将512分组转换成16个32位子分组
for(int j=0; j<16; j+=4)
{
memcpy(&Mj[j], &uchBlock[j], sizeof(ULONG));
}
/* Round 1 */
FF (a, b, c, d, Mj[ 0], S11, 0xd76aa478); /* 1 */
FF (d, a, b, c, Mj[ 1], S12, 0xe8c7b756); /* 2 */
FF (c, d, a, b, Mj[ 2], S13, 0x242070db); /* 3 */
FF (b, c, d, a, Mj[ 3], S14, 0xc1bdceee); /* 4 */
FF (a, b, c, d, Mj[ 4], S11, 0xf57c0faf); /* 5 */
FF (d, a, b, c, Mj[ 5], S12, 0x4787c62a); /* 6 */
FF (c, d, a, b, Mj[ 6], S13, 0xa8304613); /* 7 */
FF (b, c, d, a, Mj[ 7], S14, 0xfd469501); /* 8 */
FF (a, b, c, d, Mj[ 8], S11, 0x698098d8); /* 9 */
FF (d, a, b, c, Mj[ 9], S12, 0x8b44f7af); /* 10 */
FF (c, d, a, b, Mj[10], S13, 0xffff5bb1); /* 11 */
FF (b, c, d, a, Mj[11], S14, 0x895cd7be); /* 12 */
FF (a, b, c, d, Mj[12], S11, 0x6b901122); /* 13 */
FF (d, a, b, c, Mj[13], S12, 0xfd987193); /* 14 */
FF (c, d, a, b, Mj[14], S13, 0xa679438e); /* 15 */
FF (b, c, d, a, Mj[15], S14, 0x49b40821); /* 16 */
/* Round 2 */
GG (a, b, c, d, Mj[ 1], S21, 0xf61e2562); /* 17 */
GG (d, a, b, c, Mj[ 6], S22, 0xc040b340); /* 18 */
GG (c, d, a, b, Mj[11], S23, 0x265e5a51); /* 19 */
GG (b, c, d, a, Mj[ 0], S24, 0xe9b6c7aa); /* 20 */
GG (a, b, c, d, Mj[ 5], S21, 0xd62f105d); /* 21 */
GG (d, a, b, c, Mj[10], S22, 0x2441453); /* 22 */
GG (c, d, a, b, Mj[15], S23, 0xd8a1e681); /* 23 */
GG (b, c, d, a, Mj[ 4], S24, 0xe7d3fbc8); /* 24 */
GG (a, b, c, d, Mj[ 9], S21, 0x21e1cde6); /* 25 */
GG (d, a, b, c, Mj[14], S22, 0xc33707d6); /* 26 */
GG (c, d, a, b, Mj[ 3], S23, 0xf4d50d87); /* 27 */
GG (b, c, d, a, Mj[ 8], S24, 0x455a14ed); /* 28 */
GG (a, b, c, d, Mj[13], S21, 0xa9e3e905); /* 29 */
GG (d, a, b, c, Mj[ 2], S22, 0xfcefa3f8); /* 30 */
GG (c, d, a, b, Mj[ 7], S23, 0x676f02d9); /* 31 */
GG (b, c, d, a, Mj[12], S24, 0x8d2a4c8a); /* 32 */
/* Round 3 */
HH (a, b, c, d, Mj[ 5], S31, 0xfffa3942); /* 33 */
HH (d, a, b, c, Mj[ 8], S32, 0x8771f681); /* 34 */
HH (c, d, a, b, Mj[11], S33, 0x6d9d6122); /* 35 */
HH (b, c, d, a, Mj[14], S34, 0xfde5380c); /* 36 */
HH (a, b, c, d, Mj[ 1], S31, 0xa4beea44); /* 37 */
HH (d, a, b, c, Mj[ 4], S32, 0x4bdecfa9); /* 38 */
HH (c, d, a, b, Mj[ 7], S33, 0xf6bb4b60); /* 39 */
HH (b, c, d, a, Mj[10], S34, 0xbebfbc70); /* 40 */
HH (a, b, c, d, Mj[13], S31, 0x289b7ec6); /* 41 */
HH (d, a, b, c, Mj[ 0], S32, 0xeaa127fa); /* 42 */
HH (c, d, a, b, Mj[ 3], S33, 0xd4ef3085); /* 43 */
HH (b, c, d, a, Mj[ 6], S34, 0x4881d05); /* 44 */
HH (a, b, c, d, Mj[ 9], S31, 0xd9d4d039); /* 45 */
HH (d, a, b, c, Mj[12], S32, 0xe6db99e5); /* 46 */
HH (c, d, a, b, Mj[15], S33, 0x1fa27cf8); /* 47 */
HH (b, c, d, a, Mj[ 2], S34, 0xc4ac5665); /* 48 */
/* Round 4 */
II (a, b, c, d, Mj[ 0], S41, 0xf4292244); /* 49 */
II (d, a, b, c, Mj[ 7], S42, 0x432aff97); /* 50 */
II (c, d, a, b, Mj[14], S43, 0xab9423a7); /* 51 */
II (b, c, d, a, Mj[ 5], S44, 0xfc93a039); /* 52 */
II (a, b, c, d, Mj[12], S41, 0x655b59c3); /* 53 */
II (d, a, b, c, Mj[ 3], S42, 0x8f0ccc92); /* 54 */
II (c, d, a, b, Mj[10], S43, 0xffeff47d); /* 55 */
II (b, c, d, a, Mj[ 1], S44, 0x85845dd1); /* 56 */
II (a, b, c, d, Mj[ 8], S41, 0x6fa87e4f); /* 57 */
II (d, a, b, c, Mj[15], S42, 0xfe2ce6e0); /* 58 */
II (c, d, a, b, Mj[ 6], S43, 0xa3014314); /* 59 */
II (b, c, d, a, Mj[13], S44, 0x4e0811a1); /* 60 */
II (a, b, c, d, Mj[ 4], S41, 0xf7537e82); /* 61 */
II (d, a, b, c, Mj[11], S42, 0xbd3af235); /* 62 */
II (c, d, a, b, Mj[ 2], S43, 0x2ad7d2bb); /* 63 */
II (b, c, d, a, Mj[ 9], S44, 0xeb86d391); /* 64 */
A += a;
B += b;
C += c;
D += d;
}
CString GetMD5(PUCHAR lpData, ULONGLONG cchData)
{
CString strMd5;
UCHAR uchBuf[128];
ULONG mod, space, idx=0;
for(idx=0; idx + 64 <= cchData; idx+= 64)
{
TransForm(&lpData[idx], A, B, C, D);
}
mod = cchData & 0x3F;
space = (mod < 56) ? (56 - mod) : (120 - mod);
memcpy(uchBuf, &lpData[idx], mod);
memcpy(uchBuf + mod, PADDING, space);
*(PULONGLONG)&uchBuf[mod + space] = cchData << 3;
for(idx=0; idx<(mod + space + 8); idx+= 64)
{
TransForm(&uchBuf[idx], A, B, C, D);
}
strMd5.Format("%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X",
A & 0xff,(A >> 8) & 0xff, (A >> 16) & 0xff, (A >> 24) & 0xff,
B & 0xff,(B >> 8) & 0xff, (B >> 16) & 0xff, (B >> 24) & 0xff,
C & 0xff,(C >> 8) & 0xff, (C >> 16) & 0xff, (C >> 24) & 0xff,
D & 0xff,(D >> 8) & 0xff, (D >> 16) & 0xff, (D >> 24) & 0xff);
return strMd5;
}
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