Code to generate uuids for ADS setups. Uses our random generator but

conforms to standard OSF/DCE uuid format.
(This used to be commit 3b50c3b8cd86ff9a12a6e22ca3b3e904671be547)

1 files changed, 108 insertions, 0 deletions

diff --git a/source3/lib/util_uuid.c b/source3/lib/util_uuid.c
new file mode 100644
index 0000000000..b70db8de5b
--- /dev/null
+++ b/source3/lib/util_uuid.c
@@ -0,0 +1,108 @@
+/* 
+ *  Unix SMB/CIFS implementation.
+ *  UUID server routines
+ *  Copyright (C) Theodore Ts'o               1996, 1997,
+ *  Copyright (C) Jim McDonough                     2002.
+ *
+ *  This program 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 2 of the License, or
+ *  (at your option) any later version.
+ *  
+ *  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; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "includes.h"
+
+/*
+ * Offset between 15-Oct-1582 and 1-Jan-70
+ */
+#define TIME_OFFSET_HIGH 0x01B21DD2
+#define TIME_OFFSET_LOW  0x13814000
+
+struct uuid {
+        uint32   time_low;
+        uint16   time_mid;
+        uint16   time_hi_and_version;
+        uint16   clock_seq;
+        uint8    node[6];
+};
+
+
+static void uuid_pack(const struct uuid *uu, GUID *ptr)
+{
+	uint32 tmp;
+	uint8 *out = ptr->info;
+
+	tmp = uu->time_low;
+	out[3] = (uint8) tmp;
+	tmp >>= 8;
+	out[2] = (uint8) tmp;
+	tmp >>= 8;
+	out[1] = (uint8) tmp;
+	tmp >>= 8;
+	out[0] = (uint8) tmp;
+	
+	tmp = uu->time_mid;
+	out[5] = (uint8) tmp;
+	tmp >>= 8;
+	out[4] = (uint8) tmp;
+
+	tmp = uu->time_hi_and_version;
+	out[7] = (uint8) tmp;
+	tmp >>= 8;
+	out[6] = (uint8) tmp;
+
+	tmp = uu->clock_seq;
+	out[9] = (uint8) tmp;
+	tmp >>= 8;
+	out[8] = (uint8) tmp;
+
+	memcpy(out+10, uu->node, 6);
+}
+
+static void uuid_unpack(const GUID in, struct uuid *uu)
+{
+	const uint8 *ptr = in.info;
+	uint32 tmp;
+
+	tmp = *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	uu->time_low = tmp;
+
+	tmp = *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	uu->time_mid = tmp;
+	
+	tmp = *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	uu->time_hi_and_version = tmp;
+
+	tmp = *ptr++;
+	tmp = (tmp << 8) | *ptr++;
+	uu->clock_seq = tmp;
+
+	memcpy(uu->node, ptr, 6);
+}
+
+void uuid_generate_random(GUID *out)
+{
+	GUID tmp;
+	struct uuid uu;
+
+	generate_random_buffer(tmp.info, sizeof(tmp.info), True);
+	uuid_unpack(tmp, &uu);
+
+	uu.clock_seq = (uu.clock_seq & 0x3FFF) | 0x8000;
+	uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x4000;
+	uuid_pack(&uu, out);
+}