md5加密解密代码（md5解密源码）

今天给各位分享md5加密解密代码的知识，其中也会对md5解密源码进行解释，如果能碰巧解决你现在面临的问题，别忘了关注本站，现在开始吧！

本文目录一览：

• 1、Asp.net(C#)md5加密后登陆时如何解密
• 2、md5解密代码
• 3、VB MD5加密解密的代码
• 4、C#MD5加密解密
• 5、急求 MD5的加密解密算法，用C++实现的源代码 高分答谢

Asp.net(C#)md5加密后登陆时如何解密

为什么要那么麻烦呢??

何不这样做:

1、在注册时，把加密后的密码保存到数据库

2、登录时，再把输入的密码进行加密，与数据库中的密码进行比对。如果是完全一样的，那说明密码输入没有问题。

md5解密代码

如果可以进入数据库的话,你可以用另一个方法,把这个9BA16589D050E8BAD62B98669F0B7C28复制保存一下,然后把他的密码改成123456加密完的字符存进去,这样你登录时用123456就可以了,你操作完了,再把数据库给他还原成9BA16589D050E8BAD62B98669F0B7C28就可以了.我经常这么做

VB MD5加密解密的代码

Dim md5 As New MD5CryptoServiceProvider

Dim username As Byte() = (New ASCIIEncoding).GetBytes(TextBox1.Text)

'转换为哈希值Byte数组

Dim mdByte As Byte() = md5.ComputeHash(username)

'Dim mdString As String = System.BitConverter.ToString(mdByte)

Dim mdString As String = (New ASCIIEncoding).GetString(mdByte)

TextBox2.Text = mdString

md5理论上是不可破解的，要对照，只能再次加密后对照，网上也有些专门破解的网站，不过我想你要的不是那个吧

C#MD5加密解密

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();

急求 MD5的加密解密算法，用C++实现的源代码 高分答谢

要代码，还是要相关的解释资料？

---------------------------------

要代码的话：

两个文件：

--------------------------

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;

}

md5加密解密代码的介绍就聊到这里吧，感谢你花时间阅读本站内容，更多关于md5解密源码、md5加密解密代码的信息别忘了在本站进行查找喔。