用OpenSSL实现RSA算法加密(转)

 1: #include <openssl/err.h>

 2:  

 3: #define MODULUS "C8FBCF21"

 4: #define PUBLIC_EXPONENT RSA_F4

 5: #define PRIVATE_EXPONENT "97B55D7D"

 6:  

 7: int main()

 8: {

 9:  int ret, flen;

 10: BIGNUM *bnn, *bne, *bnd;

 11: unsigned char *in = "abc";

 12: unsigned char *out;

 13:  

 14: bnn = BN_new();

 15: bne = BN_new();

 16: bnd = BN_new();

 17: BN_hex2bn(&bnn, MODULUS);

 18: BN_set_word(bne, PUBLIC_EXPONENT);

 19: BN_hex2bn(&bnd, PRIVATE_EXPONENT);

 20:  

 21: RSA *r = RSA_new();

 22: r->n = bnn;

 23: r->e = bne;

 24: r->d = bnd;

 25: RSA_print_fp(stdout, r, 5);

 26:  

 27: flen = RSA_size(r);// - 11;

 28:  out = (char *)malloc(flen);

 29: bzero(out, flen);

 30:  //memset(out, 0, flen);

 31:  

 32: printf("Begin encrypt... ");

 33: ret = RSA_private_encrypt(flen, in, out, r, RSA_NO_PADDING);

 34:  if (ret < 0)

 35: {

 36: printf("Encrypt failed! ");

 37:  return 1;

 38: }

 39:  

 40: printf("Size:%d ", ret);

 41: printf("ClearText:%s ", in);

 42: printf("CipherText(Hex):");

 43:  int i;

 44:  for (i=0; i<ret; i++)

 45: {

 46: printf("0x%02x, ", *out);

 47:  out++;

 48: }

 49: printf(" ");

 50:  

 51:  //free(out);

 52: RSA_free(r);

 53:  return 0;

 54: }

 1: #include <openssl/err.h>

 2: 

 3: #define MODULUS "C8FBCF21"

 4: #define PUBLIC_EXPONENT RSA_F4

 5: #define PRIVATE_EXPONENT "97B55D7D"

 6: 

 7: int main()

 8: {

 9: int ret, flen;

 10: BIGNUM *bnn, *bne, *bnd;

 11: unsigned char *in = "abc";

 12: unsigned char *out;

 13: 

 14: bnn = BN_new();

 15: bne = BN_new();

 16: bnd = BN_new();

 17: BN_hex2bn(&bnn, MODULUS);

 18: BN_set_word(bne, PUBLIC_EXPONENT);

 19: BN_hex2bn(&bnd, PRIVATE_EXPONENT);

 20: 

 21: RSA *r = RSA_new();

 22: r->n = bnn;

 23: r->e = bne;

 24: r->d = bnd;

 25: RSA_print_fp(stdout, r, 5);

 26: 

 27: flen = RSA_size(r);// - 11;

 28: out = (char *)malloc(flen);

 29: bzero(out, flen);

 30: //memset(out, 0, flen);

 31: 

 32: printf("Begin encrypt... ");

 33: ret = RSA_private_encrypt(flen, in, out, r, RSA_NO_PADDING);

 34: if (ret < 0)

 35: {

 36: printf("Encrypt failed! ");

 37: return 1;

 38: }

 39: 

 40: printf("Size:%d ", ret);

 41: printf("ClearText:%s ", in);

 42: printf("CipherText(Hex):");

 43: int i;

 44: for (i=0; i<ret; i++)

 45: {

 46: printf("0x%02x, ", *out);

 47: out++;

 48: }

 49: printf(" ");

 50: 

 51: //free(out);

 52: RSA_free(r);

 53: return 0;

 54: }