谁有VC中用MD5对字符串进行加密的源码？

md5.h
#if !defined(_MD5_H__INCLUDED_)
#define _MD5_H__INCLUDED_typedef unsigned char *POINTER;
typedef unsigned short UINT2;
typedef unsigned long UINT4;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
};class MD5_CTX {
public:
MD5_CTX();
~MD5_CTX(); /*
* MD5 initialization. Begins an MD5 operation, writing a new context.
*/
void MD5Init(); /*
* MD5 block update operation. Continues an MD5 message-digest
* operation, processing another message block, and updating the
* context.
*/
void MD5Update(
unsigned char *input, /* input block */
unsigned int inputLen/* length of input block */
);
/*
* MD5 finalization. Ends an MD5 message-digest operation, writing the
* the message digest and zeroizing the context.
*/
void MD5Final(
unsigned char digest[16]/* message digest */
); // Prints a message digest in hexadecimal.
void MD5Print(unsigned char digest[16]);
// Digests a string and prints the result.
void MDString(char *string);
// Measures the time to digest TEST_BLOCK_COUNT TEST_BLOCK_LEN-byte blocks.
void MDTimeTrial();
// Digests a reference suite of strings and prints the results.
void MDTestSuite();
// Digests a file and prints the result.
void MDFile(char *filename);
// Digests the standard input and prints the result.
void MDFilter();private:
void MD5Transform (UINT4 state[4], unsigned char block[64]);
void Encode(unsigned char *output, UINT4 *input, unsigned int len);
void Decode(UINT4 *output, unsigned char *input, unsigned int len);
void MD5_memcpy(POINTER output, POINTER input, unsigned int len);
void MD5_memset(POINTER output, int value, unsigned int len); /*
* F, G, H and I are basic MD5 functions.
*/
inline UINT4 F(UINT4 x, UINT4 y, UINT4 z) {return (x & y) | (~x & z);}
inline UINT4 G(UINT4 x, UINT4 y, UINT4 z) {return (x & z) | (y & ~z);}
inline UINT4 H(UINT4 x, UINT4 y, UINT4 z) {return (x ^ y ^ z);}
inline UINT4 I(UINT4 x, UINT4 y, UINT4 z) {return y ^ (x | ~z);} /*
* ROTATE_LEFT rotates x left n bits.
*/
inline UINT4 ROTATE_LEFT(UINT4 x, UINT4 n) {return (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.
*/
inline void FF(UINT4 &a, UINT4 &b, UINT4 &c, UINT4 &d, UINT4 x, UINT4 s, UINT4 ac) {
a += F(b, c, d) + x + ac;
a = (a << s) | (a >> (32-s));
a += b;
}
inline void GG(UINT4 &a, UINT4 &b, UINT4 &c, UINT4 &d, UINT4 x, UINT4 s, UINT4 ac) {
a += G(b, c, d) + x + ac;
a = ROTATE_LEFT(a, s);
a += b;
}
inline void HH(UINT4 &a, UINT4 &b, UINT4 &c, UINT4 &d, UINT4 x, UINT4 s, UINT4 ac) {
a += H(b, c, d) + x + ac;
a = ROTATE_LEFT(a, s);
a += b;
}
inline void II(UINT4 &a, UINT4 &b, UINT4 &c, UINT4 &d, UINT4 x, UINT4 s, UINT4 ac) {
a += I(b, c, d) + x + ac;
a = ROTATE_LEFT(a, s);
a += b;
}private:
UINT4 state[4];/* state (ABCD) */
UINT4 count[2];/* number of bits, modulo 2^64 (lsb first) */
unsigned char buffer[64];/* input buffer */
};#endif // _MD5_H__INCLUDED_

md5.cpp
#include "stdafx.h"
#include "md5.h"
#include <iostream.h>
#include <string.h>
#include <time.h>const UINT4 TEST_BLOCK_LEN = 1000;
const UINT4 TEST_BLOCK_COUNT = 1000;const UINT4 S11 = 7;
const UINT4 S12 = 12;
const UINT4 S13 = 17;
const UINT4 S14 = 22;
const UINT4 S21 = 5;
const UINT4 S22 = 9;
const UINT4 S23 = 14;
const UINT4 S24 = 20;
const UINT4 S31 = 4;
const UINT4 S32 = 11;
const UINT4 S33 = 16;
const UINT4 S34 = 23;
const UINT4 S41 = 6;
const UINT4 S42 = 10;
const UINT4 S43 = 15;
const UINT4 S44 = 21;MD5_CTX::MD5_CTX()
{
MD5Init();
}MD5_CTX::~MD5_CTX()
{
}void MD5_CTX::MD5Init()
{
count[0] = count[1] = 0; state[0] = 0x67452301;
state[1] = 0xefcdab89;
state[2] = 0x98badcfe;
state[3] = 0x10325476;
}void MD5_CTX::MD5Update(unsigned char *input, unsigned int inputLen)
{
unsigned int i, index, partLen;

// Compute number of bytes mod 64
index = (unsigned int)((count[0] >> 3) & 0x3F);

// Update number of bits
if ((count[0] += ((UINT4)inputLen << 3)) < ((UINT4)inputLen << 3))
count[1]++;
count[1] += ((UINT4)inputLen >> 29);

partLen = 64 - index;

// Transform as many times as possible.
if (inputLen >= partLen) {
MD5_memcpy((POINTER)&buffer[index], (POINTER)input, partLen);
MD5Transform(state, buffer);

for (i = partLen; i + 63 < inputLen; i += 64)
MD5Transform (state, &input[i]);

index = 0;
}
else
i = 0;

// Buffer remaining input
MD5_memcpy((POINTER)&buffer[index], (POINTER)&input[i], inputLen-i);
}void MD5_CTX::MD5Final(unsigned char digest[16])
{
unsigned char bits[8];
unsigned int index, padLen; /* Save number of bits */
Encode(bits, count, 8); /* Pad out to 56 mod 64.*/
index = (unsigned int)((count[0] >> 3) & 0x3f);
padLen = (index < 56) ? (56 - index) : (120 - index);
MD5Update(PADDING, padLen); /* Append length (before padding) */
MD5Update(bits, 8); /* Store state in digest */
Encode(digest, state, 16); /* Zeroize sensitive information. */
MD5_memset((unsigned char*)this, 0, sizeof(MD5_CTX));
}//////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////
void MD5_CTX::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, 0x02441453); /* 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, 0x04881d05); /* 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));
}

void MD5_CTX::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);
}
}void MD5_CTX::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);
}void MD5_CTX::MD5_memcpy(POINTER output, POINTER input, unsigned int len)
{
memcpy(output, input, len);
}void MD5_CTX::MD5_memset(POINTER output, int value, unsigned int len)
{
memset(output, value, len);
}void MD5_CTX::MD5Print(unsigned char digest[16])
{
unsigned int i;
for (i = 0; i < 16; i++)
printf ("%02x", digest[i]);
}void MD5_CTX::MDString(char *string)
{
unsigned char digest[16];
unsigned int len = strlen(string);

MD5Init();
MD5Update((unsigned char*)string, len);
MD5Final(digest);

printf("MD5 (\"%s\") = ", string);
MD5Print(digest);
printf("\n");
}void MD5_CTX::MDTimeTrial()
{
MD5_CTX context;
time_t endTime, startTime;
unsigned char block[TEST_BLOCK_LEN], digest[16];
unsigned int i;
printf("MD5 time trial. Digesting %d %d-byte blocks ...",
TEST_BLOCK_LEN, TEST_BLOCK_COUNT);

// Initialize block
for (i = 0; i < TEST_BLOCK_LEN; i++)
block[i] = (unsigned char)(i & 0xff);

// Start timer
time(&startTime);

// Digest blocks
MD5Init();
for (i = 0; i < TEST_BLOCK_COUNT; i++)
MD5Update(block, TEST_BLOCK_LEN);
MD5Final(digest);

// Stop timer
time(&endTime);

printf(" done\n");
printf("Digest = ");
MD5Print(digest);
printf("\nTime = %ld seconds\n", (long)(endTime-startTime));
printf("Speed = %ld bytes/second\n",
(long)TEST_BLOCK_LEN * (long)TEST_BLOCK_COUNT/(endTime-startTime));
}void MD5_CTX::MDTestSuite()
{
printf("MD5 test suite:\n");

MDString("");
MDString("a");
MDString("abc");
MDString("message digest");
MDString("abcdefghijklmnopqrstuvwxyz");
MDString("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");
MDString("12345678901234567890123456789012345678901234567890123456789012345678901234567890");
}void MD5_CTX::MDFile(char *filename)
{
FILE *file;
int len;
unsigned char buffer[1024], digest[16];

if ((file = fopen(filename, "rb")) == NULL)
printf("%s can't be opened\n", filename);
else {
MD5Init();
while (len = fread (buffer, 1, 1024, file))
MD5Update(buffer, len);
MD5Final(digest);

fclose(file);

printf("MD%d (%s) = ", 5, filename);
MD5Print(digest);
printf("\n");
}
}void MD5_CTX::MDFilter()
{
int len;
unsigned char buffer[16], digest[16];

MD5Init();
while (len = fread(buffer, 1, 16, stdin))
MD5Update(buffer, len);
MD5Final(digest);

MD5Print(digest);
printf("\n");
}
测试代码：
MD5_CTX md5T;md5T.MDTestSuite();
md5T.MDTimeTrial();
md5T.MDFile("C:\\aaa.txt");
md5T.MDFilter();

哇，你比我还懒！
void MD5_CTX::MDTestSuite()
{
printf("MD5 test suite:\n");

MDString("");
MDString("a");
MDString("abc");
MDString("message digest");
MDString("abcdefghijklmnopqrstuvwxyz");
MDString("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");
MDString("12345678901234567890123456789012345678901234567890123456789012345678901234567890");
}
其实这个函数并没有用得，只是用于客户调用来验证加密算法的正确性，你在工程中调用如下函数来做加密就可以了。
void MD5_CTX::MDString1234567(char *string)
{
unsigned char digest[16];
unsigned int len = strlen(string);

MD5Init();
MD5Update((unsigned char*)string, len);
MD5Final(digest);
}
string是你要加密的串，digest是结果。

我将md5.cpp md5.h 加入工程，但编译的时候报
md5.obj : error LNK2001: unresolved external symbol "private: void __thiscall MD5_CTX::MD5_memcpy(unsigned char *,unsigned char *,unsigned int)" (?MD5_memcpy@MD5_CTX@@AAEXPAE0I@Z)md5.obj : error LNK2001: unresolved external symbol "private: void __thiscall MD5_CTX::MD5_memset(unsigned char *,int,unsigned int)" (?MD5_memset@MD5_CTX@@AAEXPAEHI@Z)md5.obj : error LNK2001: unresolved external symbol "private: void __thiscall MD5_CTX::Encode(unsigned char *,unsigned long *,unsigned int)" (?Encode@MD5_CTX@@AAEXPAEPAKI@Z)md5.obj : error LNK2001: unresolved external symbol "private: void __thiscall MD5_CTX::Decode(unsigned long *,unsigned char *,unsigned int)" (?Decode@MD5_CTX@@AAEXPAKPAEI@Z)不知道这是什么原因，请教！谢谢

算你狠:)
给你发个Demo，请查收！

给我也发一个好吗？[email protected]

顺便问一下，MD5算法是不可逆的，也就是算出的MD5值一般只能做校验，
不能解密，是不是这样啊？

可以去这里看一看，有完整的演示代码，绝对实用：
http://www.aslike.net

rocmeteor(拄杖携残醉，扶风上九霄)
给我也发个Demo，谢谢；[email protected]

调试易

谁有VC中用MD5对字符串进行加密的源码？

解决方案 »