source4/librpc/ndr/ndr_misc.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    UUID/GUID/policy_handle functions
   5
   6    Copyright (C) Theodore Ts'o               1996, 1997,
   7    Copyright (C) Jim McDonough                     2002.
   8    Copyright (C) Andrew Tridgell                   2003.
   9    Copyright (C) Stefan (metze) Metzmacher         2004.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 2 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program; if not, write to the Free Software
  23    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  24 */
  25
  26 #include "includes.h"
  27
  28 /*
  29   build a GUID from a string
  30 */
  31 NTSTATUS GUID_from_string(const char *s, struct GUID *guid)
  32 {
  33         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
  34         uint32_t time_low;
  35         uint32_t time_mid, time_hi_and_version;
  36         uint32_t clock_seq[2];
  37         uint32_t node[6];
  38         int i;
  39
  40         if (s == NULL) {
  41                 return NT_STATUS_INVALID_PARAMETER;
  42         }
  43
  44         if (11 == sscanf(s, "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
  45                          &time_low, &time_mid, &time_hi_and_version,
  46                          &clock_seq[0], &clock_seq[1],
  47                          &node[0], &node[1], &node[2], &node[3], &node[4], &node[5])) {
  48                 status = NT_STATUS_OK;
  49         } else if (11 == sscanf(s, "{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}",
  50                                 &time_low, &time_mid, &time_hi_and_version,
  51                                 &clock_seq[0], &clock_seq[1],
  52                                 &node[0], &node[1], &node[2], &node[3], &node[4], &node[5])) {
  53                 status = NT_STATUS_OK;
  54         }
  55
  56         if (!NT_STATUS_IS_OK(status)) {
  57                 return status;
  58         }
  59
  60         guid->time_low = time_low;
  61         guid->time_mid = time_mid;
  62         guid->time_hi_and_version = time_hi_and_version;
  63         guid->clock_seq[0] = clock_seq[0];
  64         guid->clock_seq[1] = clock_seq[1];
  65         for (i=0;i<6;i++) {
  66                 guid->node[i] = node[i];
  67         }
  68
  69         return NT_STATUS_OK;
  70 }
  71
  72 /* generate a random GUID */
  73 struct GUID GUID_random(void)
  74 {
  75         struct GUID guid;
  76
  77         generate_random_buffer((uint8_t *)&guid, sizeof(guid));
  78         guid.clock_seq[0] = (guid.clock_seq[0] & 0x3F) | 0x80;
  79         guid.time_hi_and_version = (guid.time_hi_and_version & 0x0FFF) | 0x4000;
  80
  81         return guid;
  82 }
  83
  84 BOOL GUID_all_zero(const struct GUID *u)
  85 {
  86         if (u->time_low != 0 ||
  87             u->time_mid != 0 ||
  88             u->time_hi_and_version != 0 ||
  89             u->clock_seq[0] != 0 ||
  90             u->clock_seq[1] != 0 ||
  91             !all_zero(u->node, 6)) {
  92                 return False;
  93         }
  94         return True;
  95 }
  96
  97 BOOL GUID_equal(const struct GUID *u1, const struct GUID *u2)
  98 {
  99         if (u1->time_low != u2->time_low ||
 100             u1->time_mid != u2->time_mid ||
 101             u1->time_hi_and_version != u2->time_hi_and_version ||
 102             u1->clock_seq[0] != u2->clock_seq[0] ||
 103             u1->clock_seq[1] != u2->clock_seq[1] ||
 104             memcmp(u1->node, u2->node, 6) != 0) {
 105                 return False;
 106         }
 107         return True;
 108 }
 109
 110 /*
 111   its useful to be able to display these in debugging messages
 112 */
 113 char *GUID_string(TALLOC_CTX *mem_ctx, const struct GUID *guid)
 114 {
 115         return talloc_asprintf(mem_ctx,
 116                                "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 117                                guid->time_low, guid->time_mid,
 118                                guid->time_hi_and_version,
 119                                guid->clock_seq[0],
 120                                guid->clock_seq[1],
 121                                guid->node[0], guid->node[1],
 122                                guid->node[2], guid->node[3],
 123                                guid->node[4], guid->node[5]);
 124 }
 125
 126 char *GUID_string2(TALLOC_CTX *mem_ctx, const struct GUID *guid)
 127 {
 128         return talloc_asprintf(mem_ctx,
 129                                "{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}",
 130                                guid->time_low, guid->time_mid,
 131                                guid->time_hi_and_version,
 132                                guid->clock_seq[0],
 133                                guid->clock_seq[1],
 134                                guid->node[0], guid->node[1],
 135                                guid->node[2], guid->node[3],
 136                                guid->node[4], guid->node[5]);
 137 }
 138
 139 void ndr_print_GUID(struct ndr_print *ndr, const char *name, const struct GUID *guid)
 140 {
 141         ndr->print(ndr, "%-25s: %s", name, GUID_string(ndr, guid));
 142 }
 143
 144 BOOL policy_handle_empty(struct policy_handle *h)
 145 {
 146         return (h->handle_type == 0 && GUID_all_zero(&h->uuid));
 147 }