librpc/ndr/uuid.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    UUID/GUID functions
   5
   6    Copyright (C) Theodore Ts'o               1996, 1997,
   7    Copyright (C) Jim McDonough                     2002.
   8    Copyright (C) Andrew Tridgell                   2003.
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22 */
  23
  24 #include "includes.h"
  25 #include "librpc/ndr/libndr.h"
  26 #include "librpc/gen_ndr/ndr_misc.h"
  27
  28 /**
  29   build a GUID from a string
  30 */
  31 _PUBLIC_ NTSTATUS GUID_from_data_blob(const DATA_BLOB *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         uint8_t buf16[16];
  39
  40         DATA_BLOB blob16 = data_blob_const(buf16, sizeof(buf16));
  41         int i;
  42
  43         if (s->data == NULL) {
  44                 return NT_STATUS_INVALID_PARAMETER;
  45         }
  46
  47         if (s->length == 36) {
  48                 TALLOC_CTX *mem_ctx;
  49                 const char *string;
  50
  51                 mem_ctx = talloc_new(NULL);
  52                 NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
  53                 string = talloc_strndup(mem_ctx, (const char *)s->data, s->length);
  54                 NT_STATUS_HAVE_NO_MEMORY(string);
  55                 if (11 == sscanf(string,
  56                                  "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
  57                                  &time_low, &time_mid, &time_hi_and_version,
  58                                  &clock_seq[0], &clock_seq[1],
  59                                  &node[0], &node[1], &node[2], &node[3], &node[4], &node[5])) {
  60                         status = NT_STATUS_OK;
  61                 }
  62                 talloc_free(mem_ctx);
  63
  64         } else if (s->length == 38) {
  65                 TALLOC_CTX *mem_ctx;
  66                 const char *string;
  67
  68                 mem_ctx = talloc_new(NULL);
  69                 NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
  70                 string = talloc_strndup(mem_ctx, (const char *)s->data, s->length);
  71                 NT_STATUS_HAVE_NO_MEMORY(string);
  72                 if (11 == sscanf((const char *)s->data,
  73                                  "{%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x}",
  74                                  &time_low, &time_mid, &time_hi_and_version,
  75                                  &clock_seq[0], &clock_seq[1],
  76                                  &node[0], &node[1], &node[2], &node[3], &node[4], &node[5])) {
  77                         status = NT_STATUS_OK;
  78                 }
  79                 talloc_free(mem_ctx);
  80
  81         } else if (s->length == 32) {
  82                 size_t rlen = strhex_to_str((char *)blob16.data, blob16.length,
  83                                             (const char *)s->data, s->length);
  84                 if (rlen != blob16.length) {
  85                         return NT_STATUS_INVALID_PARAMETER;
  86                 }
  87
  88                 s = &blob16;
  89                 return GUID_from_ndr_blob(s, guid);
  90         }
  91
  92         if (s->length == 16) {
  93                 enum ndr_err_code ndr_err;
  94                 struct GUID guid2;
  95                 TALLOC_CTX *mem_ctx;
  96
  97                 mem_ctx = talloc_new(NULL);
  98                 NT_STATUS_HAVE_NO_MEMORY(mem_ctx);
  99
 100                 ndr_err = ndr_pull_struct_blob(s, mem_ctx, NULL, &guid2,
 101                                                (ndr_pull_flags_fn_t)ndr_pull_GUID);
 102                 talloc_free(mem_ctx);
 103                 if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 104                         return ndr_map_error2ntstatus(ndr_err);
 105                 }
 106                 *guid = guid2;
 107                 return NT_STATUS_OK;
 108         }
 109
 110         if (!NT_STATUS_IS_OK(status)) {
 111                 return status;
 112         }
 113
 114         guid->time_low = time_low;
 115         guid->time_mid = time_mid;
 116         guid->time_hi_and_version = time_hi_and_version;
 117         guid->clock_seq[0] = clock_seq[0];
 118         guid->clock_seq[1] = clock_seq[1];
 119         for (i=0;i<6;i++) {
 120                 guid->node[i] = node[i];
 121         }
 122
 123         return NT_STATUS_OK;
 124 }
 125
 126 /**
 127   build a GUID from a string
 128 */
 129 _PUBLIC_ NTSTATUS GUID_from_string(const char *s, struct GUID *guid)
 130 {
 131         DATA_BLOB blob = data_blob_string_const(s);
 132         return GUID_from_data_blob(&blob, guid);
 133         return NT_STATUS_OK;
 134 }
 135
 136 /**
 137   build a GUID from a string
 138 */
 139 _PUBLIC_ NTSTATUS NS_GUID_from_string(const char *s, struct GUID *guid)
 140 {
 141         NTSTATUS status = NT_STATUS_INVALID_PARAMETER;
 142         uint32_t time_low;
 143         uint32_t time_mid, time_hi_and_version;
 144         uint32_t clock_seq[2];
 145         uint32_t node[6];
 146         int i;
 147
 148         if (s == NULL) {
 149                 return NT_STATUS_INVALID_PARAMETER;
 150         }
 151
 152         if (11 == sscanf(s, "%08x-%04x%04x-%02x%02x%02x%02x-%02x%02x%02x%02x",
 153                          &time_low, &time_mid, &time_hi_and_version,
 154                          &clock_seq[0], &clock_seq[1],
 155                          &node[0], &node[1], &node[2], &node[3], &node[4], &node[5])) {
 156                 status = NT_STATUS_OK;
 157         }
 158
 159         if (!NT_STATUS_IS_OK(status)) {
 160                 return status;
 161         }
 162
 163         guid->time_low = time_low;
 164         guid->time_mid = time_mid;
 165         guid->time_hi_and_version = time_hi_and_version;
 166         guid->clock_seq[0] = clock_seq[0];
 167         guid->clock_seq[1] = clock_seq[1];
 168         for (i=0;i<6;i++) {
 169                 guid->node[i] = node[i];
 170         }
 171
 172         return NT_STATUS_OK;
 173 }
 174
 175 /**
 176  * generate a random GUID
 177  */
 178 _PUBLIC_ struct GUID GUID_random(void)
 179 {
 180         struct GUID guid;
 181
 182         generate_random_buffer((uint8_t *)&guid, sizeof(guid));
 183         guid.clock_seq[0] = (guid.clock_seq[0] & 0x3F) | 0x80;
 184         guid.time_hi_and_version = (guid.time_hi_and_version & 0x0FFF) | 0x4000;
 185
 186         return guid;
 187 }
 188
 189 /**
 190  * generate an empty GUID
 191  */
 192 _PUBLIC_ struct GUID GUID_zero(void)
 193 {
 194         struct GUID guid;
 195
 196         ZERO_STRUCT(guid);
 197
 198         return guid;
 199 }
 200
 201 _PUBLIC_ bool GUID_all_zero(const struct GUID *u)
 202 {
 203         if (u->time_low != 0 ||
 204             u->time_mid != 0 ||
 205             u->time_hi_and_version != 0 ||
 206             u->clock_seq[0] != 0 ||
 207             u->clock_seq[1] != 0 ||
 208             !all_zero(u->node, 6)) {
 209                 return false;
 210         }
 211         return true;
 212 }
 213
 214 _PUBLIC_ bool GUID_equal(const struct GUID *u1, const struct GUID *u2)
 215 {
 216         if (u1->time_low != u2->time_low ||
 217             u1->time_mid != u2->time_mid ||
 218             u1->time_hi_and_version != u2->time_hi_and_version ||
 219             u1->clock_seq[0] != u2->clock_seq[0] ||
 220             u1->clock_seq[1] != u2->clock_seq[1] ||
 221             memcmp(u1->node, u2->node, 6) != 0) {
 222                 return false;
 223         }
 224         return true;
 225 }
 226
 227 _PUBLIC_ int GUID_compare(const struct GUID *u1, const struct GUID *u2)
 228 {
 229         if (u1->time_low != u2->time_low) {
 230                 return u1->time_low - u2->time_low;
 231         }
 232
 233         if (u1->time_mid != u2->time_mid) {
 234                 return u1->time_mid - u2->time_mid;
 235         }
 236
 237         if (u1->time_hi_and_version != u2->time_hi_and_version) {
 238                 return u1->time_hi_and_version - u2->time_hi_and_version;
 239         }
 240
 241         if (u1->clock_seq[0] != u2->clock_seq[0]) {
 242                 return u1->clock_seq[0] - u2->clock_seq[0];
 243         }
 244
 245         if (u1->clock_seq[1] != u2->clock_seq[1]) {
 246                 return u1->clock_seq[1] - u2->clock_seq[1];
 247         }
 248
 249         return memcmp(u1->node, u2->node, 6);
 250 }
 251
 252 /**
 253   its useful to be able to display these in debugging messages
 254 */
 255 _PUBLIC_ char *GUID_string(TALLOC_CTX *mem_ctx, const struct GUID *guid)
 256 {
 257         return talloc_asprintf(mem_ctx,
 258                                "%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
 259                                guid->time_low, guid->time_mid,
 260                                guid->time_hi_and_version,
 261                                guid->clock_seq[0],
 262                                guid->clock_seq[1],
 263                                guid->node[0], guid->node[1],
 264                                guid->node[2], guid->node[3],
 265                                guid->node[4], guid->node[5]);
 266 }
 267
 268 _PUBLIC_ char *GUID_string2(TALLOC_CTX *mem_ctx, const struct GUID *guid)
 269 {
 270         char *ret, *s = GUID_string(mem_ctx, guid);
 271         ret = talloc_asprintf(mem_ctx, "{%s}", s);
 272         talloc_free(s);
 273         return ret;
 274 }
 275
 276 _PUBLIC_ char *GUID_hexstring(TALLOC_CTX *mem_ctx, const struct GUID *guid)
 277 {
 278         char *ret;
 279         DATA_BLOB guid_blob;
 280         enum ndr_err_code ndr_err;
 281         TALLOC_CTX *tmp_mem;
 282
 283         tmp_mem = talloc_new(mem_ctx);
 284         if (!tmp_mem) {
 285                 return NULL;
 286         }
 287         ndr_err = ndr_push_struct_blob(&guid_blob, tmp_mem,
 288                                        NULL,
 289                                        guid,
 290                                        (ndr_push_flags_fn_t)ndr_push_GUID);
 291         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
 292                 talloc_free(tmp_mem);
 293                 return NULL;
 294         }
 295
 296         ret = data_blob_hex_string(mem_ctx, &guid_blob);
 297         talloc_free(tmp_mem);
 298         return ret;
 299 }
 300
 301 _PUBLIC_ char *NS_GUID_string(TALLOC_CTX *mem_ctx, const struct GUID *guid)
 302 {
 303         return talloc_asprintf(mem_ctx,
 304                                "%08x-%04x%04x-%02x%02x%02x%02x-%02x%02x%02x%02x",
 305                                guid->time_low, guid->time_mid,
 306                                guid->time_hi_and_version,
 307                                guid->clock_seq[0],
 308                                guid->clock_seq[1],
 309                                guid->node[0], guid->node[1],
 310                                guid->node[2], guid->node[3],
 311                                guid->node[4], guid->node[5]);
 312 }
 313
 314 _PUBLIC_ bool policy_handle_empty(struct policy_handle *h)
 315 {
 316         return (h->handle_type == 0 && GUID_all_zero(&h->uuid));
 317 }