--- libelwix/src/uuid.c	2025/11/17 19:53:08	1.1
+++ libelwix/src/uuid.c	2025/11/17 20:02:48	1.2
@@ -0,0 +1,147 @@
+/*************************************************************************
+* (C) 2025 AITNET ltd - Sofia/Bulgaria - <misho@aitnet.org>
+*  by Michael Pounov <misho@elwix.org>
+*
+* $Author: misho $
+* $Id: uuid.c,v 1.2 2025/11/17 20:02:48 misho Exp $
+*
+**************************************************************************
+The ELWIX and AITNET software is distributed under the following
+terms:
+
+All of the documentation and software included in the ELWIX and AITNET
+Releases is copyrighted by ELWIX - Sofia/Bulgaria <info@elwix.org>
+
+Copyright 2004 - 2025
+	by Michael Pounov <misho@elwix.org>.  All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+1. Redistributions of source code must retain the above copyright
+   notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+3. All advertising materials mentioning features or use of this software
+   must display the following acknowledgement:
+This product includes software developed by Michael Pounov <misho@elwix.org>
+ELWIX - Embedded LightWeight unIX and its contributors.
+4. Neither the name of AITNET nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY AITNET AND CONTRIBUTORS ``AS IS'' AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGE.
+*/
+#include "global.h"
+
+
+/*
+ * e_random() - ELWIX Random routine
+ *
+ * return: random number
+ */
+long
+e_random()
+{
+	int fd;
+	long ret = -1L;
+
+	fd = open("/dev/urandom", O_RDONLY);
+	if (fd == -1) {
+		srandom(time(NULL) ^ getpid());
+		return random();
+	}
+	if (read(fd, &ret, sizeof ret) == -1) {
+		srandom(time(NULL) ^ getpid());
+		ret = random();
+	}
+	close(fd);
+
+	return ret;
+}
+
+/*
+ * e_randbuf() - Fill buffer with random numbers
+ *
+ * @rnd = Buffer
+ * @rndlen = Length of buffer
+ *
+ * return: -1 error or 0 ok
+ */
+int
+e_randbuf(u_char *rnd, int rndlen)
+{
+	int fd, ret = 0;
+
+	if (!rnd || rndlen < 1)
+		return -1;
+
+	fd = open("/dev/urandom", O_RDONLY);
+	if (fd == -1) {
+		elwix_SetErr(errno, "%s", strerror(errno));
+		return -1;
+	}
+	if (read(fd, rnd, rndlen) == -1) {
+		elwix_SetErr(errno, "%s", strerror(errno));
+		ret = -1;
+	}
+	close(fd);
+
+	return ret;
+}
+
+/*
+ * uuid_gen() - Generate UUID
+ *
+ * @uuid = UUID
+ *
+ * return: -1 error or 0 ok
+ */
+int
+uuid_gen(uuid_t uuid)
+{
+	uuid_t id;
+
+	if (e_randbuf(id, sizeof id) == -1)
+		return -1;
+
+	/* UUID v4 */
+	id[6] = (id[6] & 0xf) | 0x40;
+	/* RFC4122 */
+	id[8] = (id[8] & 0x3f) | 0x80;
+
+	if (uuid)
+		memcpy(uuid, id, sizeof(uuid_t));
+	return 0;
+}
+
+/*
+ * uuid_str() - Convert UUID to string
+ *
+ * @uuid = UUID
+ * @str = String
+ * @len = Length
+ *
+ * return: -1 error or processed bytes
+ */
+int
+uuid_str(uuid_t uuid, char *str, int len)
+{
+	if (!uuid || !str || len < 37)
+		return -1;
+
+	return snprintf(str, len, "%02x%02x%02x%02x-%02x%02x-%02x%02x-%02x%02x-%02x%02x%02x%02x%02x%02x",
+			uuid[0], uuid[1], uuid[2], uuid[3], uuid[4], uuid[5], uuid[6], uuid[7],
+			uuid[8], uuid[9], uuid[10], uuid[11], uuid[12], uuid[13], uuid[14], uuid[15]);
+}