Linux下c基于openssl生成MD5的函数

#include "stdio.h"

#include <string.h>

#include <stdlib.h>

#include <openssl/md5.h>

int

get_md5(

char

*input,

char

*output)

{

char

password[1024*1024*5]={0};

MD5_CTX x;

int

i = 0, len;

char

*out = NULL;

unsigned

char

d[16];

unsigned

char

tmp[128] = { 0 };

strcpy

(password,input);

MD5_Init(&x);

MD5_Update(&x, (

char

*)password,

strlen

(password));

MD5_Final(d, &x);

out = (

char

*)

malloc

(35);

memset

(out,0x00, 35);

strcpy

(out,

"$1$"

);

// printf("MD5(\"%s\") = ", password);

for

(i = 0; i < 16; i++)

{

sprintf

(out + (i*2),

"%02X"

, d[i]);

// 转换为32位

}

out[32] = 0;

// printf("%s\n", out);

strcpy

(output,out);

free

(out);

return

0;

}

#include<stdio.h>

#include<openssl/md5.h>

#include<string.h>

int

main(

int

argc,

char

**argv )

{

MD5_CTX ctx;

unsigned

char

*data=

"123"

;

unsigned

char

md[16];

char

buf[33]={

'\0'

};

char

tmp[3]={

'\0'

};

int

i;

MD5_Init(&ctx);

MD5_Update(&ctx,data,

strlen

(data));

MD5_Final(md,&ctx);

for

( i=0; i<16; i++ ){

sprintf

(tmp,

"%02X"

,md[i]);

strcat

(buf,tmp);

}

printf

(

"%s\n"

,buf);

return

0;

}

#include<stdio.h>

#include<openssl/md5.h>

#include<string.h>

int

main(

int

argc,

char

**argv )

{

unsigned

char

*data =

"123"

;

unsigned

char

md[16];

int

i;

char

tmp[3]={

'\0'

},buf[33]={

'\0'

};

MD5(data,

strlen

(data),md);

for

(i = 0; i < 16; i++){

sprintf

(tmp,

"%2.2x"

,md[i]);

strcat

(buf,tmp);

}

printf

(

"%s\n"

,buf);

return

0;

}