根据别人的MD5源码封装的一个类 选择自 fly2sky2 的 Blog
//md5.h头文件的内容开始
#pragma once
#define uchar unsigned chartypedef unsigned char *POINTER;typedef unsigned short int UINT2;typedef unsigned long int UINT4;#define PROTO_LIST(list) list
//MD5 context.typedef struct md5_ctx { UINT4 state[4]; // state (ABCD) UINT4 count[2]; // number of bits, modulo 2^64 (lsb first) unsigned char buffer[64]; // input buffer} MD5_CTX;
void MD5Init PROTO_LIST ((MD5_CTX *));void MD5Update PROTO_LIST ((MD5_CTX *, unsigned char *, unsigned int));void MD5Final PROTO_LIST ((unsigned char [16], MD5_CTX *));
/* 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
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 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};
/* 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) + (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); \ }
class CMD5{private: void MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen); void MD5Final (unsigned char digest[16], MD5_CTX *context); static void MD5Transform (UINT4 state[4], unsigned char block[64]); void ToHex(BYTE * Out,BYTE * lpbuffer,DWORD dwSize);public: CMD5(void); ~CMD5(void); void MDString (uchar *string,uchar *out,int len);};
//运行所需参数#define TEST_BLOCK_LEN 1000#define TEST_BLOCK_COUNT 1000static void MDString PROTO_LIST ((char *));static void MDTimeTrial PROTO_LIST ((void));static void MDTestSuite PROTO_LIST ((void));static void MDFile PROTO_LIST ((char *));static void MDFilter PROTO_LIST ((void));static void MDPrint PROTO_LIST ((unsigned char [16]));#define MD5_CTX MD5_CTX#define MDInit MD5Init#define MDUpdate MD5Update#define MDFinal MD5Final/* Digests a string and prints the result. */
//md5.h文件结束
//md5.cap文件内容开始
#include "StdAfx.h"#include ".\MD5.h"
CMD5::CMD5(void){}
CMD5::~CMD5(void){}
/* MD5 initialization. Begins an MD5 operation, writing a new context. */void MD5Init (MD5_CTX *context){ context->count[0] = context->count[1] = 0; /* Load magic initialization constants.*/ context->state[0] = 0x67452301; context->state[1] = 0xefcdab89; context->state[2] = 0x98badcfe; context->state[3] = 0x10325476;}
/* MD5 block update operation. Continues an MD5 message-digest operation, processing another message block, and updating the context. */void CMD5::MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen){ unsigned int i, index, partLen;
/* Compute number of bytes mod 64 */ index = (unsigned int)((context->count[0] >> 3) & 0x3F);
/* Update number of bits */ if ((context->count[0] += ((UINT4)inputLen << 3)) < ((UINT4)inputLen << 3)) context->count[1]++; context->count[1] += ((UINT4)inputLen >> 29);
partLen = 64 - index;
/* Transform as many times as possible.*/ 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;
/* Buffer remaining input */ MD5_memcpy ((POINTER)&context->buffer[index], (POINTER)&input[i], inputLen-i);}
/* MD5 finalization. Ends an MD5 message-digest operation, writing the the message digest and zeroizing the context. */void CMD5::MD5Final (unsigned char digest[16], MD5_CTX *context){ unsigned char bits[8]; unsigned int index, padLen;
/* Save number of bits */ Encode (bits, context->count, 8);
/* Pad out to 56 mod 64.*/ index = (unsigned int)((context->count[0] >> 3) & 0x3f); padLen = (index < 56) ? (56 - index) : (120 - index); MD5Update (context, PADDING, padLen);
/* Append length (before padding) */ MD5Update (context, bits, 8);
/* Store state in digest */ Encode (digest, context->state, 16);
/* Zeroize sensitive information.*/ MD5_memset ((POINTER)context, 0, sizeof (*context));}
/* MD5 basic transformation. Transforms state based on block. */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); }}
/* Decodes input (unsigned char) into output (UINT4). Assumes len is a multiple of 4. */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);}
/* Note: Replace "for loop" with standard memcpy if possible. */
static void MD5_memcpy (POINTER output, POINTER input, unsigned int len){ unsigned int i;
for (i = 0; i < len; i++) output[i] = input[i];}
/* Note: Replace "for loop" with standard memset if possible. */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;}
void CMD5::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;
/* Zeroize sensitive information. */ MD5_memset ((POINTER)x, 0, sizeof (x));}
/* Encodes input (UINT4) into output (unsigned char). Assumes len is a multiple of 4. */void CMD5::MDString (uchar *string,uchar *out,int len){// uchar bb[10],i; MD5_CTX context;// AnsiString s;
unsigned char digest[16]; //unsigned int len = strlen ((char *)string);
memset(digest,0,sizeof(digest)); MDInit (&context); MDUpdate (&context, string, len); MDFinal (digest, &context); ToHex(out,digest,sizeof(digest));}
void CMD5::ToHex(uchar * Out,uchar * lpbuffer,DWORD dwSize){ CHAR TMP[1024]={0}; CHAR t[10]={0}; for(int i=0;i<(long)dwSize;i++) { sprintf(t,"%02x",lpbuffer[i]); strcat(TMP,t); } memcpy(Out,TMP,strlen(TMP));}
//md5.cpp文件结束
调用：
CMD5 MyMD5;
BYTE s[256]={0};
BYTE md5[50]={0};
CMyMD5.MDString(md5,s,sizeof(s));
作者Blog：http://blog.csdn.net/fly2sky2/
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[【技术文档】]根据别人的MD5源码封装的一个类