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https://github.com/samba-team/samba.git
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104 lines
2.7 KiB
C
104 lines
2.7 KiB
C
/*
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* Unix SMB/CIFS implementation.
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* UUID server routines
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* Copyright (C) Theodore Ts'o 1996, 1997,
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* Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2002.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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/*
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* Offset between 15-Oct-1582 and 1-Jan-70
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*/
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#define TIME_OFFSET_HIGH 0x01B21DD2
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#define TIME_OFFSET_LOW 0x13814000
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struct uuid {
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uint32 time_low;
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uint16 time_mid;
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uint16 time_hi_and_version;
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uint8 clock_seq[2];
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uint8 node[6];
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};
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static void uuid_pack(const struct uuid *uu, GUID *ptr)
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{
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uint8 *out = ptr->info;
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SIVAL(out, 0, uu->time_low);
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SSVAL(out, 4, uu->time_mid);
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SSVAL(out, 6, uu->time_hi_and_version);
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memcpy(out+8, uu->clock_seq, 2);
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memcpy(out+10, uu->node, 6);
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}
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static void uuid_unpack(const GUID in, struct uuid *uu)
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{
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const uint8 *ptr = in.info;
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uu->time_low = IVAL(ptr, 0);
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uu->time_mid = SVAL(ptr, 4);
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uu->time_hi_and_version = SVAL(ptr, 6);
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memcpy(uu->clock_seq, ptr+8, 2);
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memcpy(uu->node, ptr+10, 6);
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}
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void smb_uuid_generate_random(GUID *out)
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{
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GUID tmp;
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struct uuid uu;
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generate_random_buffer(tmp.info, sizeof(tmp.info), True);
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uuid_unpack(tmp, &uu);
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uu.clock_seq[0] = (uu.clock_seq[0] & 0x3F) | 0x80;
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uu.time_hi_and_version = (uu.time_hi_and_version & 0x0FFF) | 0x4000;
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uuid_pack(&uu, out);
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}
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char *smb_uuid_to_string(const GUID in)
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{
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struct uuid uu;
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char *out;
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uuid_unpack(in, &uu);
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asprintf(&out, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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uu.time_low, uu.time_mid, uu.time_hi_and_version,
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uu.clock_seq[0], uu.clock_seq[1],
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uu.node[0], uu.node[1], uu.node[2],
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uu.node[3], uu.node[4], uu.node[5]);
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return out;
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}
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const char *smb_uuid_string_static(const GUID in)
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{
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struct uuid uu;
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static char out[37];
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uuid_unpack(in, &uu);
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slprintf(out, sizeof(out) -1,
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"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
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uu.time_low, uu.time_mid, uu.time_hi_and_version,
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uu.clock_seq[0], uu.clock_seq[1],
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uu.node[0], uu.node[1], uu.node[2],
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uu.node[3], uu.node[4], uu.node[5]);
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return out;
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}
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