用OpenSSL实现RSA算法加密(转)

1: #include 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 45: { 46: printf("0x%02x, ", *out); 47: out++; 48: } 49: printf(" "); 50:   51: //free(out); 52: RSA_free(r); 53: return 0; 54: }

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1: #include 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 45: { 46: printf("0x%02x, ", *out); 47: out++; 48: } 49: printf(" "); 50:  51: //free(out); 52: RSA_free(r); 53: return 0; 54: }