您的位置：首页 > 编程语言

OpenSSL 编程 - RSA 加密解密

2010-06-02 11:08 549 查看
gcc -o rsa-decrypt rsa-decrypt.c -lcrypto


*/


#include <openssl/rsa.h>




#define MODULUS "C8FBCF21"


#define PUBLIC_EXPONENT RSA_F4


#define PRIVATE_EXPONENT "97B55D7D"




int main()


{


int ret, flen;


     BIGNUM *bnn, *bne;


     unsigned char in[] = {0x98, 0x79, 0xb2, 0x76};


     unsigned char *out;




     bnn = BN_new();


     bne = BN_new();


     BN_hex2bn(&bnn, MODULUS);


     BN_set_word(bne, PUBLIC_EXPONENT);




     RSA *r = RSA_new();


     r->n = bnn;


     r->e = bne;


     RSA_print_fp(stdout, r, 5);




     flen = RSA_size(r);


out = (unsigned char *)malloc(flen);


     bzero(out, flen);




     printf("Begin decrypt... ");


     ret = RSA_public_decrypt(sizeof(in), in, out, r, RSA_NO_PADDING);


if (ret < 0)


{


         printf("Decrypt failed! ");


return 1;


     }




     printf("Size:%d ", ret);


     printf("ClearText:%s ", out);




     free(out);


     RSA_free(r);


return 0;


}



解密：


/*


gcc -o rsa-decrypt rsa-decrypt.c -lcrypto


*/


#include <openssl/rsa.h>




#define MODULUS "C8FBCF21"


#define PUBLIC_EXPONENT RSA_F4


#define PRIVATE_EXPONENT "97B55D7D"




int main()


{


int ret, flen;


     BIGNUM *bnn, *bne;


     unsigned char in[] = {0x98, 0x79, 0xb2, 0x76};


     unsigned char *out;




     bnn = BN_new();


     bne = BN_new();


     BN_hex2bn(&bnn, MODULUS);


     BN_set_word(bne, PUBLIC_EXPONENT);




     RSA *r = RSA_new();


     r->n = bnn;


     r->e = bne;


     RSA_print_fp(stdout, r, 5);




     flen = RSA_size(r);


out = (unsigned char *)malloc(flen);


     bzero(out, flen);




     printf("Begin decrypt... ");


     ret = RSA_public_decrypt(sizeof(in), in, out, r, RSA_NO_PADDING);


if (ret < 0)


{


         printf("Decrypt failed! ");


return 1;


     }




     printf("Size:%d ", ret);


     printf("ClearText:%s ", out);




     free(out);


     RSA_free(r);


return 0;


}
 
内容来自用户分享和网络整理，不保证内容的准确性，如有侵权内容，可联系管理员处理 点击这里给我发消息
标签： 
相关文章推荐
新的分享
章节导航