2 rsa.c -- RSA key handling
3 Copyright (C) 2007-2013 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 "../system.h"
22 #include <openssl/pem.h>
23 #include <openssl/err.h>
25 #define TINC_RSA_INTERNAL
28 #include "../logger.h"
33 #ifndef HAVE_RSA_SET0_KEY
34 int RSA_set0_key(RSA *r, BIGNUM *n, BIGNUM *e, BIGNUM *d) {
45 rsa_t *rsa_set_hex_public_key(char *n, char *e) {
49 if((size_t)BN_hex2bn(&bn_n, n) != strlen(n) || (size_t)BN_hex2bn(&bn_e, e) != strlen(e)) {
55 rsa_t *rsa = RSA_new();
61 RSA_set0_key(rsa, bn_n, bn_e, NULL);
66 rsa_t *rsa_set_hex_private_key(char *n, char *e, char *d) {
71 if((size_t)BN_hex2bn(&bn_n, n) != strlen(n) || (size_t)BN_hex2bn(&bn_e, e) != strlen(e) || (size_t)BN_hex2bn(&bn_d, d) != strlen(d)) {
78 rsa_t *rsa = RSA_new();
84 RSA_set0_key(rsa, bn_n, bn_e, bn_d);
91 rsa_t *rsa_read_pem_public_key(FILE *fp) {
92 rsa_t *rsa = PEM_read_RSAPublicKey(fp, NULL, NULL, NULL);
96 rsa = PEM_read_RSA_PUBKEY(fp, NULL, NULL, NULL);
100 logger(DEBUG_ALWAYS, LOG_ERR, "Unable to read RSA public key: %s", ERR_error_string(ERR_get_error(), NULL));
106 rsa_t *rsa_read_pem_private_key(FILE *fp) {
107 rsa_t *rsa = PEM_read_RSAPrivateKey(fp, NULL, NULL, NULL);
110 logger(DEBUG_ALWAYS, LOG_ERR, "Unable to read RSA private key: %s", ERR_error_string(ERR_get_error(), NULL));
116 size_t rsa_size(rsa_t *rsa) {
117 return RSA_size(rsa);
120 bool rsa_public_encrypt(rsa_t *rsa, void *in, size_t len, void *out) {
121 if((size_t)RSA_public_encrypt(len, in, out, rsa, RSA_NO_PADDING) == len) {
125 logger(DEBUG_ALWAYS, LOG_ERR, "Unable to perform RSA encryption: %s", ERR_error_string(ERR_get_error(), NULL));
129 bool rsa_private_decrypt(rsa_t *rsa, void *in, size_t len, void *out) {
130 if((size_t)RSA_private_decrypt(len, in, out, rsa, RSA_NO_PADDING) == len) {
134 logger(DEBUG_ALWAYS, LOG_ERR, "Unable to perform RSA decryption: %s", ERR_error_string(ERR_get_error(), NULL));
138 bool rsa_active(rsa_t *rsa) {
142 void rsa_free(rsa_t *rsa) {