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/*
* OpenVPN -- An application to securely tunnel IP networks
* over a single UDP port, with support for SSL/TLS-based
* session authentication and key exchange,
* packet encryption, packet authentication, and
* packet compression.
*
* Copyright (C) 2002-2009 OpenVPN Technologies, Inc. <sales@openvpn.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation.
*
* This program 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 this program (see the file COPYING included with this
* distribution); if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* Each session is identified by a random 8-byte session identifier.
*
* For efficiency, the session id is only transmitted over the control
* channel (which only sees traffic occasionally when keys are being
* negotiated). The data channel sees a smaller version of the session-id --
* it is called the key_id and is currently 2 bits long.
*/
#include "syshead.h"
#if defined(USE_CRYPTO) && defined(USE_SSL)
#include "error.h"
#include "common.h"
#include "crypto.h"
#include "session_id.h"
#include "memdbg.h"
const struct session_id x_session_id_zero;
void
session_id_random (struct session_id *sid)
{
prng_bytes (sid->id, SID_SIZE);
}
const char *
session_id_print (const struct session_id *sid, struct gc_arena *gc)
{
return format_hex (sid->id, SID_SIZE, 0, gc);
}
#else
static void dummy(void) {}
#endif /* USE_CRYPTO && USE_SSL*/
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