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authorJim McDonough <jmcd@samba.org>2002-08-12 13:48:19 +0000
committerJim McDonough <jmcd@samba.org>2002-08-12 13:48:19 +0000
commitd8d1d65958fd00514aff92d9d2240b8ff89583fb (patch)
treeef324c33fcab237f55feca31d66356ee14c11750 /source3/lib
parent28bf5e5f2d935671ff1d06c6efe2d8ff3bfafdae (diff)
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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)
Diffstat (limited to 'source3/lib')
-rw-r--r--source3/lib/util_uuid.c108
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);
+}