2 crypto.c -- Cryptographic miscellaneous functions and initialisation
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/rand.h>
23 #include <openssl/evp.h>
24 #include <openssl/engine.h>
26 #include "../crypto.h"
28 void crypto_init(void) {
29 RAND_load_file("/dev/urandom", 1024);
31 ENGINE_load_builtin_engines();
32 ENGINE_register_all_complete();
34 ERR_load_crypto_strings();
35 OpenSSL_add_all_algorithms();
38 fprintf(stderr, "Not enough entropy for the PRNG!\n");
43 void crypto_exit(void) {
47 void randomize(void *out, size_t outlen) {
48 RAND_pseudo_bytes(out, outlen);