急求 MD5的加密解密算法，用C 实现的源代码 高分答谢(md5解密在线转换代码)
急求 MD5的加密解密算法，用C 实现的源代码 高分答谢(md5解密在线转换代码)
要代码，还是要相关的解释资料？
---------------------------------
要代码的话：
两个文件：
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1. md5.h：
#pragma once
typedef unsigned long int UINT32;
typedef unsigned short int UINT16;
/* MD5 context. */
typedef struct {
UINT32 state[4]; /* state (ABCD) */
UINT32 count[2]; /* number of bits, modulo 2^64 (lsb first) */
unsigned char buffer[64]; /* input buffer */
} MD5_CTX;
void MD5Init (MD5_CTX *);
void MD5Update (MD5_CTX *, unsigned char *, unsigned int);
void MD5Final (unsigned char [16], MD5_CTX *);
--------------------------
2. md5.cpp：
#include "md5.h"
#include "memory.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
static void MD5Transform (UINT32 a[4], unsigned char b[64]);
static void Encode (unsigned char *, UINT32 *, unsigned int);
static void Decode (UINT32 *, unsigned char *, 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
};
#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)))
#define ROTATE_LEFT(x, n) (((x) (n)) | ((x) (32-(n))))
#define FF(a, b, c, d, x, s, ac) { \
(a) += F ((b), (c), (d)) + (x) + (UINT32)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define GG(a, b, c, d, x, s, ac) { \
(a) += G ((b), (c), (d)) + (x) + (UINT32)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define HH(a, b, c, d, x, s, ac) { \
(a) += H ((b), (c), (d)) + (x) + (UINT32)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
#define II(a, b, c, d, x, s, ac) { \
(a) += I ((b), (c), (d)) + (x) + (UINT32)(ac); \
(a) = ROTATE_LEFT ((a), (s)); \
(a) += (b); \
}
void MD5Init (MD5_CTX *context)
{
context-count[0] = context-count[1] = 0;
context-state[0] = 0x67452301;
context-state[1] = 0xefcdab89;
context-state[2] = 0x98badcfe;
context-state[3] = 0x10325476;
}
void MD5Update (MD5_CTX *context, unsigned char *input, unsigned int inputLen)
{
unsigned int i, index, partLen;
index = (unsigned int)((context-count[0] 3) 0x3F);
if ((context-count[0] += ((UINT32)inputLen 3))
((UINT32)inputLen 3))
context-count[1]++;
context-count[1] += ((UINT32)inputLen 29);
partLen = 64 - index;
if (inputLen = partLen) {
memcpy((unsigned char *)context-buffer[index], (unsigned char *)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;
memcpy((unsigned char *)context-buffer[index], (unsigned char *)input[i],
inputLen-i);
}
void MD5Final (unsigned char digest[16], MD5_CTX * context)
{
unsigned char bits[8];
unsigned int index, padLen;
Encode (bits, context-count, 8);
index = (unsigned int)((context-count[0] 3) 0x3f);
padLen = (index 56) ? (56 - index) : (120 - index);
MD5Update (context, PADDING, padLen);
MD5Update (context, bits, 8);
Encode (digest, context-state, 16);
memset ((unsigned char *)context, 0, sizeof (*context));
}
static void MD5Transform (UINT32 state[4], unsigned char block[64])
{
UINT32 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;
memset ((unsigned char *)x, 0, sizeof (x));
}
static void Encode (unsigned char *output, UINT32 *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);
}
}
static void Decode (UINT32 *output, unsigned char *input, unsigned int len)
{
unsigned int i, j;
for (i = 0, j = 0; j len; i++, j += 4)
output[i] = ((UINT32)input[j]) | (((UINT32)input[j+1]) 8) |
(((UINT32)input[j+2]) 16) | (((UINT32)input[j+3]) 24);
}
--------------------------
就这两个文件。使用的时候把它们加入工程或者makefile，调用时包含md5.h即可，给个简单的例子，输入一个字符串然后计算它的md5值并输出，在VC6.0和GCC4.4下测试通过：
#include stdio.h
#include string.h
#include "md5.h"
int main ()
{
char tmp[128];
unsigned char digest[16];
MD5_CTX context;
scanf("%s",tmp);
MD5Init (context);
MD5Update (context, (unsigned char*)tmp, strlen(tmp));
MD5Final (digest,context);
printf("MD5Value:");
for(int i=0; i16; ++i)
{
printf("%02X",digest[i]);
}
printf("\n");
return 0;
}
无法解密，md5的特性就是只能加密，所以用md5加密的时候，一定要记住你填写的内容，否则只能用重置的办法才能解决忘记的问题了。
MD5加密步骤：
1、百度”站长工具“，点击打开。
2、然后点击导航里的”代码转换工具“，选择”MD5加密“。
3、然后输入欲加密的字符串，选择多少位，然后点击“加密”即可。
你建一个winform程序，拖一个textbox，再拖一个button。双击button，把下面代码粘贴进去。(我手工写的，已经验证可以用)
MD5
md5
=
MD5.Create();
string
str
=
textBox1.Text.Trim();
byte[]
bytes
=
md5.ComputeHash(Encoding.UTF8.GetBytes(str.ToString()));
string
bStr
=
BitConverter.ToString(bytes);
textBox1.Text
=
bStr.ToString();
admin的md5码,以及md5值计算工具(32位``) cc2c6ee559e7ac6cb87a7ebcae5d5996
(32位) 21232f297a57a5a743894a0e4a801fc3
(16位) 7A57A5A743894A0E
(40位) 7a57a5a743894a0e4a801fc343894a0e4a801fc3
其实16位的md5码就是32位的md5码中第九个开始往后数十六个字符.
忘密码时候修改密码用...admin 的加密代码：
16位加密：7a57a5a743894a0e
32位加密：21232f297a57a5a743894a0e4a801fc3
admin888的MD5加密码
16位：469e80d32c0559f8
32位：7fef6171469e80d32c0559f88b377245
可以解密的，以下两个网站即可解密。你给的不是标准的MD5值，可能源码被修改后加密所得的值。 下面的网址有ASP源码，MD5在线破解(转换)之数据库查询工具，如果你想在本地使用，需要IIS支持。
