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/*
* Copyright (c) 2010-2012 Balabit
* Copyright (c) 2010-2012 Balázs Scheidler
* Copyright (c) 2012 Gergely Nagy <algernon@balabit.hu>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* As an additional exemption you are allowed to compile & link against the
* OpenSSL libraries as published by the OpenSSL project. See the file
* COPYING for details.
*/
#include "uuid.h"
#include <openssl/rand.h>
#include <arpa/inet.h>
void
uuid_gen_random(gchar *buf, gsize buflen)
{
union
{
struct
{
guint32 time_low;
guint16 time_mid;
guint16 time_hi_and_version;
guint8 clk_seq_hi_res;
guint8 clk_seq_low;
guint8 node[6];
guint16 node_low;
guint32 node_hi;
};
guchar __rnd[16];
} uuid;
RAND_bytes(uuid.__rnd, sizeof(uuid));
uuid.clk_seq_hi_res = (uuid.clk_seq_hi_res & ~0xC0) | 0x80;
uuid.time_hi_and_version = htons((uuid.time_hi_and_version & ~0xF000) | 0x4000);
g_snprintf(buf, buflen, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
uuid.time_low, uuid.time_mid, uuid.time_hi_and_version,
uuid.clk_seq_hi_res, uuid.clk_seq_low,
uuid.node[0], uuid.node[1], uuid.node[2],
uuid.node[3], uuid.node[4], uuid.node[5]);
}
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