//---------------------------------------------------------------------------
/////cpp文件
#pragma hdrstop
#include "MD5.h"
//---------------------------------------------------------------------------
#pragma package(smart_init)
/* 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], UCHAR[64]));
static void Encode PROTO_LIST ((PUCHAR, UINT4*, UINT4));
static void Decode PROTO_LIST ((UINT4 *, PUCHAR, UINT4));
static void MD5_memcpy PROTO_LIST ((PUCHAR, PUCHAR, UINT4));
static void MD5_memset PROTO_LIST ((PUCHAR, int, UINT4));
static 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
};
/* 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); }
/* 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 MD5Update(MD5_CTX *context, PUCHAR input,UINT4 inputLen)
{
UINT4 i, index, partLen;
/* Compute number of bytes mod 64 */
index = (UINT4)((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((PUCHAR)&context->buffer[index], (PUCHAR)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((PUCHAR)&context->buffer[index], (PUCHAR)&input[i],inputLen-i);
}
/* MD5 finalization. Ends an MD5 message-digest operation, writing the the message digest and zeroizing the context.*/
void MD5Final(UCHAR digest[],MD5_CTX * context)
{
UCHAR bits[8];
UINT4 index, padLen;
/* Save number of bits */
Encode (bits, context->count, 8);
/* Pad out to 56 mod 64.*/
index = (UINT4)((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 ((PUCHAR)context, 0, sizeof (*context));
}
/* MD5 basic transformation. Transforms state based on block. */
static void MD5Transform (UINT4 state[], UCHAR block[])
{
UINT4 a = state[0], b = state[1], c = state[2], d = state[3];
UINT4 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 ((PUCHAR)x, (int)0, (UINT4)(sizeof(x)));
}
/*Encodes input (UINT4) into output (unsigned char). Assumes len is a multiple of 4.*/
static void Encode (PUCHAR output, UINT4 *input,UINT4 len)
{
UINT4 i, j;
for (i = 0, j = 0; j < len; i++, j += 4)
{
output[j] = (UCHAR)(input[i] & 0xff);
output[j+1] = (UCHAR)((input[i] >> 8) & 0xff);
output[j+2] = (UCHAR)((input[i] >> 16) & 0xff);
output[j+3] = (UCHAR)((input[i] >> 24) & 0xff);
}
}
/* Decodes input (unsigned char) into output (UINT4). Assumes len is a multiple of 4.*/
static void Decode (UINT4 *output, PUCHAR input, UINT4 len)
{
UINT4 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 (PUCHAR output,PUCHAR input, UINT4 len)
{
UINT4 i;
for (i = 0; i < len; i++)
output[i] = input[i];
}
/* Note: Replace "for loop" with standard memset if possible. */
static void MD5_memset (PUCHAR output,int value,UINT4 len)
{
UINT4 i;
for (i = 0; i < len; i++)
((char *)output)[i] = (char)value;
}
AnsiString __fastcall MD5_CodeString(AnsiString Input)
{
char Result[33]={0};
int Len=Input.Length();
unsigned char dst[16];
char tmp[3];
MD5_CTX mc;
MD5Init(&mc);
MD5Update(&mc,Input.c_str(),Len);
MD5Final(dst,&mc);
for(int i=0;i<16;i++)
{
sprintf(tmp,"%02x",dst[i]);
tmp[2]=0;
strncat(Result,tmp,2);
}
Result[32]=0;
return AnsiString(Result);
// return AnsiString(UpperCase(Result));
}
//---------------------------------------------------------------------------
AnsiString __fastcall MD5_CodeFile(AnsiString FileName)
{
if(!FileExists(FileName)) return AnsiString("");
int Len=0;
unsigned char dst[16];
char res[33]={0};
char tmp[3];
MD5_CTX mc;
TMemoryStream *ms=new TMemoryStream();
try
{
try
{
ms->LoadFromFile(FileName);
Len=ms->Size;
MD5Init(&mc);
MD5Update(&mc,(unsigned char*)(ms->Memory),Len);
MD5Final(dst,&mc);
for(int i=0;i<16;i++)
{
sprintf(tmp,"%02x",dst[i]);
tmp[2]=0;
strncat(res,tmp,2);
}
res[32]=0;
}
catch(...)
{
res[0]=0;
}
}
__finally
{
delete ms; ms=NULL;
}
return AnsiString(res);
}
#ifndef _MD5_H_066A0C4C-8D5C-4698-8AF8-421A1CA8442C
#define _MD5_H_066A0C4C-8D5C-4698-8AF8-421A1CA8442C
#define MD5 5
#ifndef MD
#define MD MD5
#endif
#ifndef PROTOTYPES
#define PROTOTYPES 1
#endif
typedef unsigned char* PUCHAR;
typedef unsigned short int UINT2;
typedef unsigned int UINT4;
typedef unsigned char UCHAR;
#if PROTOTYPES
#define PROTO_LIST(list) list
#else
#define PROTO_LIST(list) ()
#endif
typedef struct
{
UINT4 state[4];
UINT4 count[2];
UCHAR buffer[64];
} MD5_CTX;
void MD5Init PROTO_LIST ((MD5_CTX* Md5_ctx));
void MD5Update PROTO_LIST ((MD5_CTX* Md5_ctx, PUCHAR Input, UINT4 Legth));
void MD5Final PROTO_LIST ((UCHAR Digest[16], MD5_CTX* Md5_ctx));
//#ifdef MD5_BCB5
#include <vcl.h>
#include <stdio.h>
extern AnsiString __fastcall MD5_CodeString(AnsiString Input);
extern AnsiString __fastcall MD5_CodeFile(AnsiString FileName);
//#endif
#endif
以上就是C++MD5类了，采用BCB6.0编译的，其他编译器稍微修改下变量类型就好了。
调用方法如下：
String s = "admin";
s = MD5_CodeString(s);//其实只需要用到这个函数即可，其他的，在MD5类里面都已经全部搞定了，可以直接拿来用。
我们会发现，此时s = “21232f297a57a5a743894a0e4a801fc3”；