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authorOthmar Gsenger <otti@anytun.org>2008-04-12 11:38:42 +0000
committerOthmar Gsenger <otti@anytun.org>2008-04-12 11:38:42 +0000
commitfffd213c8cba2135afda493d797c41c10354770e (patch)
treebb5eea1b12871d8c3fed0e687d83be3e504d11b2 /src/openvpn/session_id.c
parentsvn cleanup (diff)
big svn cleanup
Diffstat (limited to 'src/openvpn/session_id.c')
-rw-r--r--src/openvpn/session_id.c67
1 files changed, 67 insertions, 0 deletions
diff --git a/src/openvpn/session_id.c b/src/openvpn/session_id.c
new file mode 100644
index 0000000..66c2442
--- /dev/null
+++ b/src/openvpn/session_id.c
@@ -0,0 +1,67 @@
+/*
+ * 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) 2002-2005 OpenVPN Solutions LLC <info@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.
+ */
+
+#ifdef WIN32
+#include "config-win32.h"
+#else
+#include "config.h"
+#endif
+
+#if defined(USE_CRYPTO) && defined(USE_SSL)
+
+#include "syshead.h"
+
+#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*/