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/*
* uAnytun
*
* uAnytun is a tiny implementation of SATP. Unlike Anytun which is a full
* featured implementation uAnytun has no support for multiple connections
* or synchronisation. It is a small single threaded implementation intended
* to act as a client on small platforms.
* The secure anycast tunneling protocol (satp) defines a protocol used
* for communication between any combination of unicast and anycast
* tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
* mode and allows tunneling of every ETHER TYPE protocol (e.g.
* ethernet, ip, arp ...). satp directly includes cryptography and
* message authentication based on the methods used by SRTP. It is
* intended to deliver a generic, scaleable and secure solution for
* tunneling and relaying of packets of any protocol.
*
*
* Copyright (C) 2007-2014 Christian Pointner <equinox@anytun.org>
*
* This file is part of uAnytun.
*
* uAnytun is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* uAnytun is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with uAnytun. If not, see <http://www.gnu.org/licenses/>.
*
* In addition, as a special exception, the copyright holders give
* permission to link the code of portions of this program with the
* OpenSSL library under certain conditions as described in each
* individual source file, and distribute linked combinations
* including the two.
* You must obey the GNU General Public License in all respects
* for all of the code used other than OpenSSL. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you
* do not wish to do so, delete this exception statement from your
* version. If you delete this exception statement from all source
* files in the program, then also delete it here.
*/
#ifndef UANYTUN_init_crypt_h_INCLUDED
#define UANYTUN_init_crypt_h_INCLUDED
#ifdef NO_CRYPT
int init_crypt()
{
return 0;
}
#else
#if defined(USE_SSL_CRYPTO)
int init_crypt()
{
// nothing here
return 0;
}
#elif defined(USE_NETTLE)
int init_crypt()
{
// nothing here
return 0;
}
#else // USE_GCRYPT is the default
#include <gcrypt.h>
#define MIN_GCRYPT_VERSION "1.2.0"
int init_crypt()
{
if(!gcry_check_version(MIN_GCRYPT_VERSION)) {
log_printf(NOTICE, "invalid Version of libgcrypt, should be >= %s", MIN_GCRYPT_VERSION);
return -1;
}
gcry_error_t err = gcry_control(GCRYCTL_DISABLE_SECMEM, 0);
if(err) {
log_printf(ERROR, "failed to disable secure memory: %s", gcry_strerror(err));
return -1;
}
err = gcry_control(GCRYCTL_INITIALIZATION_FINISHED);
if(err) {
log_printf(ERROR, "failed to finish libgcrypt initialization: %s", gcry_strerror(err));
return -1;
}
log_printf(NOTICE, "libgcrypt init finished");
return 0;
}
#endif
#endif
#endif
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