2 rsagen.c -- RSA key generation and export
3 Copyright (C) 2008-2013 Guus Sliepen <guus@tinc-vpn.org>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #include <openssl/pem.h>
21 #include <openssl/err.h>
23 #define TINC_RSA_INTERNAL
26 #include "../logger.h"
27 #include "../rsagen.h"
29 /* This function prettyprints the key generation process */
31 static int indicator(int a, int b, BN_GENCB *cb) {
50 fprintf(stderr, " p\n");
54 fprintf(stderr, " q\n");
72 rsa_t *rsa_generate(size_t bits, unsigned long exponent) {
73 BIGNUM *bn_e = BN_new();
74 rsa_t *rsa = RSA_new();
75 BN_GENCB *cb = BN_GENCB_new();
77 if(!bn_e || !rsa || !cb) {
81 BN_set_word(bn_e, exponent);
82 BN_GENCB_set(cb, indicator, NULL);
84 int result = RSA_generate_key_ex(rsa, bits, bn_e, cb);
90 fprintf(stderr, "Error during key generation!\n");
100 bool rsa_write_pem_public_key(rsa_t *rsa, FILE *fp) {
101 return PEM_write_RSAPublicKey(fp, rsa);
104 bool rsa_write_pem_private_key(rsa_t *rsa, FILE *fp) {
105 return PEM_write_RSAPrivateKey(fp, rsa, NULL, NULL, 0, NULL, NULL);