Java与C++实现相同的MD5加密算法简单实例
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2024-03-13 13:49:33
1、java版
package com.lyz.utils.common;
import java.io.unsupportedencodingexce...
1、java版
package com.lyz.utils.common;
import java.io.unsupportedencodingexception;
import java.security.messagedigest;
import java.security.nosuchalgorithmexception;
/**
* md5加密
* @author liuyazhuang
*/
public class md5hash {
public static string md5java(string message) {
string digest = null;
try {
messagedigest md = messagedigest.getinstance("md5");
byte[] hash = md.digest(message.getbytes("utf-8"));
//converting byte array to hexadecimal string
stringbuilder sb = new stringbuilder(2 * hash.length);
for (byte b : hash) {
sb.append(string.format("%02x", b & 0xff));
}
digest = sb.tostring();
} catch (unsupportedencodingexception ex) {
//logger.getlogger(stringreplace.class.getname()).log(level.severe, null, ex);
} catch (nosuchalgorithmexception ex) {
//logger.getlogger(stringreplace.class.getname()).log(level.severe, null, ex);
}
return digest;
}
public static void main(string[] args) {
system.out.println(md5java("admin").touppercase());
}
}
2、c++代码
(1)md5.h
#include <stdio.h> #include <stdlib.h> #include <time.h> #include <string.h> void md5digest(char *pszinput, unsigned long ninputsize, char *pszoutput);
(2)md5.cpp
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include "md5.h"
typedef unsigned char *pointer;
typedef unsigned short int uint2;
typedef unsigned long int uint4;
typedef struct
{
uint4 state[4];
uint4 count[2];
unsigned char buffer[64];
} md5_ctx;
void md5init(md5_ctx *);
void md5update(md5_ctx *, unsigned char *, unsigned int);
void md5final(unsigned char [16], md5_ctx *);
#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 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) + (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); }
inline 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);
}
}
inline 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);
}
inline void 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);
ff (a, b, c, d, x[ 0], s11, 0xd76aa478);
ff (d, a, b, c, x[ 1], s12, 0xe8c7b756);
ff (c, d, a, b, x[ 2], s13, 0x242070db);
ff (b, c, d, a, x[ 3], s14, 0xc1bdceee);
ff (a, b, c, d, x[ 4], s11, 0xf57c0faf);
ff (d, a, b, c, x[ 5], s12, 0x4787c62a);
ff (c, d, a, b, x[ 6], s13, 0xa8304613);
ff (b, c, d, a, x[ 7], s14, 0xfd469501);
ff (a, b, c, d, x[ 8], s11, 0x698098d8);
ff (d, a, b, c, x[ 9], s12, 0x8b44f7af);
ff (c, d, a, b, x[10], s13, 0xffff5bb1);
ff (b, c, d, a, x[11], s14, 0x895cd7be);
ff (a, b, c, d, x[12], s11, 0x6b901122);
ff (d, a, b, c, x[13], s12, 0xfd987193);
ff (c, d, a, b, x[14], s13, 0xa679438e);
ff (b, c, d, a, x[15], s14, 0x49b40821);
gg (a, b, c, d, x[ 1], s21, 0xf61e2562);
gg (d, a, b, c, x[ 6], s22, 0xc040b340);
gg (c, d, a, b, x[11], s23, 0x265e5a51);
gg (b, c, d, a, x[ 0], s24, 0xe9b6c7aa);
gg (a, b, c, d, x[ 5], s21, 0xd62f105d);
gg (d, a, b, c, x[10], s22, 0x2441453);
gg (c, d, a, b, x[15], s23, 0xd8a1e681);
gg (b, c, d, a, x[ 4], s24, 0xe7d3fbc8);
gg (a, b, c, d, x[ 9], s21, 0x21e1cde6);
gg (d, a, b, c, x[14], s22, 0xc33707d6);
gg (c, d, a, b, x[ 3], s23, 0xf4d50d87);
gg (b, c, d, a, x[ 8], s24, 0x455a14ed);
gg (a, b, c, d, x[13], s21, 0xa9e3e905);
gg (d, a, b, c, x[ 2], s22, 0xfcefa3f8);
gg (c, d, a, b, x[ 7], s23, 0x676f02d9);
gg (b, c, d, a, x[12], s24, 0x8d2a4c8a);
hh (a, b, c, d, x[ 5], s31, 0xfffa3942);
hh (d, a, b, c, x[ 8], s32, 0x8771f681);
hh (c, d, a, b, x[11], s33, 0x6d9d6122);
hh (b, c, d, a, x[14], s34, 0xfde5380c);
hh (a, b, c, d, x[ 1], s31, 0xa4beea44);
hh (d, a, b, c, x[ 4], s32, 0x4bdecfa9);
hh (c, d, a, b, x[ 7], s33, 0xf6bb4b60);
hh (b, c, d, a, x[10], s34, 0xbebfbc70);
hh (a, b, c, d, x[13], s31, 0x289b7ec6);
hh (d, a, b, c, x[ 0], s32, 0xeaa127fa);
hh (c, d, a, b, x[ 3], s33, 0xd4ef3085);
hh (b, c, d, a, x[ 6], s34, 0x4881d05);
hh (a, b, c, d, x[ 9], s31, 0xd9d4d039);
hh (d, a, b, c, x[12], s32, 0xe6db99e5);
hh (c, d, a, b, x[15], s33, 0x1fa27cf8);
hh (b, c, d, a, x[ 2], s34, 0xc4ac5665);
ii (a, b, c, d, x[ 0], s41, 0xf4292244);
ii (d, a, b, c, x[ 7], s42, 0x432aff97);
ii (c, d, a, b, x[14], s43, 0xab9423a7);
ii (b, c, d, a, x[ 5], s44, 0xfc93a039);
ii (a, b, c, d, x[12], s41, 0x655b59c3);
ii (d, a, b, c, x[ 3], s42, 0x8f0ccc92);
ii (c, d, a, b, x[10], s43, 0xffeff47d);
ii (b, c, d, a, x[ 1], s44, 0x85845dd1);
ii (a, b, c, d, x[ 8], s41, 0x6fa87e4f);
ii (d, a, b, c, x[15], s42, 0xfe2ce6e0);
ii (c, d, a, b, x[ 6], s43, 0xa3014314);
ii (b, c, d, a, x[13], s44, 0x4e0811a1);
ii (a, b, c, d, x[ 4], s41, 0xf7537e82);
ii (d, a, b, c, x[11], s42, 0xbd3af235);
ii (c, d, a, b, x[ 2], s43, 0x2ad7d2bb);
ii (b, c, d, a, x[ 9], s44, 0xeb86d391);
state[0] += a;
state[1] += b;
state[2] += c;
state[3] += d;
memset ((pointer)x, 0, sizeof (x));
}
inline 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;
}
inline 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] += ((uint4)inputlen << 3))
< ((uint4)inputlen << 3))
context->count[1]++;
context->count[1] += ((uint4)inputlen >> 29);
partlen = 64 - index;
if (inputlen >= partlen) {
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;
memcpy((pointer)&context->buffer[index], (pointer)&input[i], inputlen-i);
}
inline 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 ((pointer)context, 0, sizeof (*context));
}
void md5digest(char *pszinput, unsigned long ninputsize, char *pszoutput)
{
md5_ctx context;
unsigned int len = strlen (pszinput);
md5init (&context);
md5update (&context, (unsigned char *)pszinput, len);
md5final ((unsigned char *)pszoutput, &context);
}
main()
{ char szdigest[16];
char encrypt[200];
printf("请输入要计算md5值的字符串:");
gets(encrypt);
printf("\n加密结果:");
md5digest(encrypt,strlen(encrypt),szdigest);
int i;
for (i=0;i<16;i++) printf ("%02x",(unsigned char)szdigest[i]);
getchar();
}
3、运行效果
这里我们都以输入123456为例
(1)java输出结果如下：
(2)c++输出结果如下：
以上就是小编为大家带来的java与c++实现相同的md5加密算法简单实例的全部内容了，希望对大家有所帮助，多多支持~