libgpo/gpo_ini.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Group Policy Support
   4  *  Copyright (C) Guenther Deschner 2007
   5  *  Copyright (C) Wilco Baan Hofman 2009
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 3 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  19  */
  20
  21 #include "includes.h"
  22 #include "gpo.h"
  23 #include "gpo_ini.h"
  24 #include "system/filesys.h"
  25
  26
  27 static bool change_section(const char *section, void *ctx_ptr)
  28 {
  29         struct gp_inifile_context *ctx = (struct gp_inifile_context *) ctx_ptr;
  30
  31         if (ctx->current_section) {
  32                 talloc_free(ctx->current_section);
  33         }
  34         ctx->current_section = talloc_strdup(ctx, section);
  35         if (!ctx->current_section) {
  36                 return false;
  37         }
  38         return true;
  39 }
  40
  41 /****************************************************************
  42 ****************************************************************/
  43
  44 static bool store_keyval_pair(const char *key, const char *value, void *ctx_ptr)
  45 {
  46         struct gp_inifile_context *ctx = (struct gp_inifile_context *) ctx_ptr;
  47
  48         ctx->data = talloc_realloc(ctx, ctx->data, struct keyval_pair *, ctx->keyval_count+1);
  49         if (!ctx->data) {
  50                 return false;
  51         }
  52
  53         ctx->data[ctx->keyval_count] = talloc_zero(ctx, struct keyval_pair);
  54         if (!ctx->data[ctx->keyval_count]) {
  55                 return false;
  56         }
  57
  58         ctx->data[ctx->keyval_count]->key = talloc_asprintf(ctx, "%s:%s", ctx->current_section, key);
  59         ctx->data[ctx->keyval_count]->val = talloc_strdup(ctx, value ? value : "");
  60
  61         if (!ctx->data[ctx->keyval_count]->key ||
  62             !ctx->data[ctx->keyval_count]->val) {
  63                 return false;
  64         }
  65
  66         ctx->keyval_count++;
  67         return true;
  68 }
  69
  70 /****************************************************************
  71 ****************************************************************/
  72
  73 static NTSTATUS convert_file_from_ucs2(TALLOC_CTX *mem_ctx,
  74                                        const char *filename_in,
  75                                        char **filename_out)
  76 {
  77         int tmp_fd = -1;
  78         uint8_t *data_in = NULL;
  79         uint8_t *data_out = NULL;
  80         char *tmp_name = NULL;
  81         NTSTATUS status;
  82         size_t n = 0;
  83         size_t converted_size;
  84         mode_t mask;
  85
  86         if (!filename_out) {
  87                 return NT_STATUS_INVALID_PARAMETER;
  88         }
  89
  90         data_in = (uint8_t *)file_load(filename_in, &n, 0, mem_ctx);
  91         if (!data_in) {
  92                 status = NT_STATUS_NO_SUCH_FILE;
  93                 goto out;
  94         }
  95
  96         DEBUG(11,("convert_file_from_ucs2: "
  97                "data_in[0]: 0x%x, data_in[1]: 0x%x, data_in[2]: 0x%x\n",
  98                 data_in[0], data_in[1], data_in[2]));
  99
 100         if ((data_in[0] != 0xff) || (data_in[1] != 0xfe) || (data_in[2] != 0x0d)) {
 101                 *filename_out = NULL;
 102                 status = NT_STATUS_OK;
 103                 goto out;
 104         }
 105
 106         tmp_name = talloc_asprintf(mem_ctx, "%s/convert_file_from_ucs2.XXXXXX",
 107                 tmpdir());
 108         if (!tmp_name) {
 109                 status = NT_STATUS_NO_MEMORY;
 110                 goto out;
 111         }
 112
 113         mask = umask(S_IRWXO | S_IRWXG);
 114         tmp_fd = mkstemp(tmp_name);
 115         umask(mask);
 116         if (tmp_fd == -1) {
 117                 status = NT_STATUS_ACCESS_DENIED;
 118                 goto out;
 119         }
 120
 121         if (!convert_string_talloc(mem_ctx, CH_UTF16LE, CH_UNIX, data_in, n,
 122                                    (void *)&data_out, &converted_size))
 123         {
 124                 status = NT_STATUS_INVALID_BUFFER_SIZE;
 125                 goto out;
 126         }
 127
 128         DEBUG(11,("convert_file_from_ucs2: "
 129                  "%s skipping utf16-le BOM\n", tmp_name));
 130
 131         converted_size -= 3;
 132
 133         if (write(tmp_fd, data_out + 3, converted_size) != converted_size) {
 134                 status = map_nt_error_from_unix_common(errno);
 135                 goto out;
 136         }
 137
 138         *filename_out = tmp_name;
 139
 140         status = NT_STATUS_OK;
 141
 142  out:
 143         if (tmp_fd != -1) {
 144                 close(tmp_fd);
 145         }
 146
 147         talloc_free(data_in);
 148         talloc_free(data_out);
 149
 150         return status;
 151 }
 152
 153 /****************************************************************
 154 ****************************************************************/
 155
 156 NTSTATUS gp_inifile_getstring(struct gp_inifile_context *ctx, const char *key, const char **ret)
 157 {
 158         int i;
 159
 160         for (i = 0; i < ctx->keyval_count; i++) {
 161                 if (strcmp(ctx->data[i]->key, key) == 0) {
 162                         if (ret) {
 163                                 *ret = ctx->data[i]->val;
 164                         }
 165                         return NT_STATUS_OK;
 166                 }
 167         }
 168         return NT_STATUS_NOT_FOUND;
 169 }
 170
 171 /****************************************************************
 172 ****************************************************************/
 173
 174 NTSTATUS gp_inifile_getint(struct gp_inifile_context *ctx, const char *key, int *ret)
 175 {
 176         const char *value;
 177         NTSTATUS result;
 178
 179         result = gp_inifile_getstring(ctx,key, &value);
 180         if (!NT_STATUS_IS_OK(result)) {
 181                 return result;
 182         }
 183
 184         if (ret) {
 185                 *ret = (int)strtol(value, NULL, 10);
 186         }
 187         return NT_STATUS_OK;
 188 }
 189
 190 /****************************************************************
 191 ****************************************************************/
 192
 193 NTSTATUS gp_inifile_getbool(struct gp_inifile_context *ctx, const char *key, bool *ret)
 194 {
 195         const char *value;
 196         NTSTATUS result;
 197
 198         result = gp_inifile_getstring(ctx,key, &value);
 199         if (!NT_STATUS_IS_OK(result)) {
 200                 return result;
 201         }
 202
 203         if (strequal(value, "Yes") ||
 204             strequal(value, "True")) {
 205                 if (ret) {
 206                         *ret = true;
 207                 }
 208                 return NT_STATUS_OK;
 209         } else if (strequal(value, "No") ||
 210                    strequal(value, "False")) {
 211                 if (ret) {
 212                         *ret = false;
 213                 }
 214                 return NT_STATUS_OK;
 215         }
 216
 217         return NT_STATUS_NOT_FOUND;
 218 }
 219
 220 /****************************************************************
 221 ****************************************************************/
 222
 223 NTSTATUS gp_inifile_enum_section(struct gp_inifile_context *ctx,
 224                                  const char *section,
 225                                  size_t *num_ini_keys,
 226                                  const char ***ini_keys,
 227                                  const char ***ini_values)
 228 {
 229         NTSTATUS status;
 230         int i;
 231         size_t num_keys = 0, num_vals = 0;
 232         const char **keys = NULL;
 233         const char **values = NULL;
 234
 235         if (section == NULL || num_ini_keys == NULL ||
 236             ini_keys == NULL || ini_values == NULL) {
 237                 return NT_STATUS_INVALID_PARAMETER;
 238         }
 239
 240         for (i = 0; i < ctx->keyval_count; i++) {
 241
 242                 bool ok;
 243
 244                 /*
 245                  * section: KEYNAME
 246                  * KEYNAME:value matches
 247                  * KEYNAME_OEM:value not
 248                  */
 249
 250                 if (strlen(section)+1 > strlen(ctx->data[i]->key)) {
 251                         continue;
 252                 }
 253
 254                 if (!strnequal(section, ctx->data[i]->key, strlen(section))) {
 255                         continue;
 256                 }
 257
 258                 if (ctx->data[i]->key[strlen(section)] != ':') {
 259                         continue;
 260                 }
 261
 262                 ok = add_string_to_array(ctx, ctx->data[i]->key, &keys, &num_keys);
 263                 if (!ok) {
 264                         status = NT_STATUS_NO_MEMORY;
 265                         goto failed;
 266                 }
 267
 268                 ok = add_string_to_array(ctx, ctx->data[i]->val, &values, &num_vals);
 269                 if (!ok) {
 270                         status = NT_STATUS_NO_MEMORY;
 271                         goto failed;
 272                 }
 273
 274                 if (num_keys != num_vals) {
 275                         status = NT_STATUS_INTERNAL_DB_CORRUPTION;
 276                         goto failed;
 277                 }
 278         }
 279
 280         *num_ini_keys = num_keys;
 281         *ini_keys = keys;
 282         *ini_values = values;
 283
 284         return NT_STATUS_OK;
 285
 286  failed:
 287         talloc_free(keys);
 288         talloc_free(values);
 289
 290         return status;
 291 }
 292
 293
 294 /****************************************************************
 295 ****************************************************************/
 296
 297 NTSTATUS gp_inifile_init_context(TALLOC_CTX *mem_ctx,
 298                                  uint32_t flags,
 299                                  const char *unix_path,
 300                                  const char *suffix,
 301                                  struct gp_inifile_context **ctx_ret)
 302 {
 303         struct gp_inifile_context *ctx = NULL;
 304         NTSTATUS status;
 305         int rv;
 306         char *tmp_filename = NULL;
 307         const char *ini_filename = NULL;
 308
 309         if (!unix_path || !ctx_ret) {
 310                 return NT_STATUS_INVALID_PARAMETER;
 311         }
 312
 313         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 314         NT_STATUS_HAVE_NO_MEMORY(ctx);
 315
 316         status = gp_find_file(mem_ctx, flags, unix_path, suffix,
 317                               &ini_filename);
 318
 319         if (!NT_STATUS_IS_OK(status)) {
 320                 goto failed;
 321         }
 322
 323         status = convert_file_from_ucs2(mem_ctx, ini_filename,
 324                                         &tmp_filename);
 325         if (!NT_STATUS_IS_OK(status)) {
 326                 goto failed;
 327         }
 328
 329         rv = pm_process(tmp_filename != NULL ? tmp_filename : ini_filename,
 330                         change_section, store_keyval_pair, ctx);
 331         if (!rv) {
 332                 return NT_STATUS_NO_SUCH_FILE;
 333         }
 334
 335
 336         ctx->generated_filename = tmp_filename;
 337         ctx->mem_ctx = mem_ctx;
 338
 339         *ctx_ret = ctx;
 340
 341         return NT_STATUS_OK;
 342
 343  failed:
 344
 345         DEBUG(1,("gp_inifile_init_context failed: %s\n",
 346                 nt_errstr(status)));
 347
 348         talloc_free(ctx);
 349
 350         return status;
 351 }
 352
 353 /****************************************************************
 354 ****************************************************************/
 355
 356 NTSTATUS gp_inifile_init_context_direct(TALLOC_CTX *mem_ctx,
 357                                         const char *unix_path,
 358                                         struct gp_inifile_context **pgp_ctx)
 359 {
 360         struct gp_inifile_context *gp_ctx = NULL;
 361         NTSTATUS status;
 362         bool rv;
 363         char *tmp_filename = NULL;
 364
 365         if (unix_path == NULL || pgp_ctx == NULL) {
 366                 return NT_STATUS_INVALID_PARAMETER;
 367         }
 368
 369         gp_ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 370         if (gp_ctx == NULL) {
 371                 return NT_STATUS_NO_MEMORY;
 372         }
 373
 374         status = convert_file_from_ucs2(mem_ctx, unix_path,
 375                                         &tmp_filename);
 376         if (!NT_STATUS_IS_OK(status)) {
 377                 goto failed;
 378         }
 379
 380         rv = pm_process_with_flags(tmp_filename != NULL ? tmp_filename : unix_path,
 381                                    true,
 382                                    change_section,
 383                                    store_keyval_pair,
 384                                    gp_ctx);
 385         if (!rv) {
 386                 return NT_STATUS_NO_SUCH_FILE;
 387         }
 388
 389         gp_ctx->generated_filename = tmp_filename;
 390         gp_ctx->mem_ctx = mem_ctx;
 391
 392         *pgp_ctx = gp_ctx;
 393
 394         return NT_STATUS_OK;
 395
 396  failed:
 397
 398         DEBUG(1,("gp_inifile_init_context_direct failed: %s\n",
 399                 nt_errstr(status)));
 400
 401         talloc_free(gp_ctx);
 402
 403         return status;
 404 }
 405
 406
 407 /****************************************************************
 408  parse the local gpt.ini file
 409 ****************************************************************/
 410
 411 #define GPT_INI_SECTION_GENERAL "General"
 412 #define GPT_INI_PARAMETER_VERSION "Version"
 413 #define GPT_INI_PARAMETER_DISPLAYNAME "displayName"
 414
 415 NTSTATUS parse_gpt_ini(TALLOC_CTX *mem_ctx,
 416                        const char *filename,
 417                        uint32_t *version,
 418                        char **display_name)
 419 {
 420         NTSTATUS result;
 421         int rv;
 422         int v = 0;
 423         const char *name = NULL;
 424         struct gp_inifile_context *ctx;
 425
 426         if (!filename) {
 427                 return NT_STATUS_INVALID_PARAMETER;
 428         }
 429
 430         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 431         NT_STATUS_HAVE_NO_MEMORY(ctx);
 432
 433         rv = pm_process(filename, change_section, store_keyval_pair, ctx);
 434         if (!rv) {
 435                 return NT_STATUS_NO_SUCH_FILE;
 436         }
 437
 438
 439         result = gp_inifile_getstring(ctx, GPT_INI_SECTION_GENERAL
 440                         ":"GPT_INI_PARAMETER_DISPLAYNAME, &name);
 441         if (!NT_STATUS_IS_OK(result)) {
 442                 /* the default domain policy and the default domain controller
 443                  * policy never have a displayname in their gpt.ini file */
 444                 DEBUG(10,("parse_gpt_ini: no name in %s\n", filename));
 445         }
 446
 447         if (name && display_name) {
 448                 *display_name = talloc_strdup(ctx, name);
 449                 if (*display_name == NULL) {
 450                         return NT_STATUS_NO_MEMORY;
 451                 }
 452         }
 453
 454         result = gp_inifile_getint(ctx, GPT_INI_SECTION_GENERAL
 455                         ":"GPT_INI_PARAMETER_VERSION, &v);
 456         if (!NT_STATUS_IS_OK(result)) {
 457                 DEBUG(10,("parse_gpt_ini: no version\n"));
 458                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 459         }
 460
 461         if (version) {
 462                 *version = v;
 463         }
 464
 465         talloc_free(ctx);
 466
 467         return NT_STATUS_OK;
 468 }