diff options
Diffstat (limited to 'source4/lib/util_uuid.c')
| -rw-r--r-- | source4/lib/util_uuid.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/source4/lib/util_uuid.c b/source4/lib/util_uuid.c new file mode 100644 index 0000000000..76eb93a9b8 --- /dev/null +++ b/source4/lib/util_uuid.c @@ -0,0 +1,104 @@ +/* + * 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; + uint8 clock_seq[2]; + uint8 node[6]; +}; + + +static void uuid_pack(const struct uuid *uu, GUID *ptr) +{ + uint8 *out = ptr->info; + + SIVAL(out, 0, uu->time_low); + SSVAL(out, 4, uu->time_mid); + SSVAL(out, 6, uu->time_hi_and_version); + memcpy(out+8, uu->clock_seq, 2); + memcpy(out+10, uu->node, 6); +} + +static void uuid_unpack(const GUID in, struct uuid *uu) +{ + const uint8 *ptr = in.info; + + uu->time_low = IVAL(ptr, 0); + uu->time_mid = SVAL(ptr, 4); + uu->time_hi_and_version = SVAL(ptr, 6); + memcpy(uu->clock_seq, ptr+8, 2); + memcpy(uu->node, ptr+10, 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[0] = (uu.clock_seq[0] & 0x3F) | 0x80; + uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x4000; + uuid_pack(&uu, out); +} + +char *guid_to_string(const GUID in) +{ + struct uuid uu; + char *out; + + uuid_unpack(in, &uu); + + asprintf(&out, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", + uu.time_low, uu.time_mid, uu.time_hi_and_version, + uu.clock_seq[0], uu.clock_seq[1], + uu.node[0], uu.node[1], uu.node[2], + uu.node[3], uu.node[4], uu.node[5]); + + return out; +} + +const char *uuid_string(TALLOC_CTX *mem_ctx, const GUID in) +{ + struct uuid uu; + char *out; + + uuid_unpack(in, &uu); + if (!out) return NULL; + out = talloc_asprintf(mem_ctx, + "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x", + uu.time_low, uu.time_mid, uu.time_hi_and_version, + uu.clock_seq[0], uu.clock_seq[1], + uu.node[0], uu.node[1], uu.node[2], + uu.node[3], uu.node[4], uu.node[5]); + return out; +} |