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);
  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, NULL);
  91         if (!data_in) {
  92                 status = NT_STATUS_NO_SUCH_FILE;
  93                 goto out;
  94         }
  95
  96         tmp_name = talloc_asprintf(mem_ctx, "%s/convert_file_from_ucs2.XXXXXX",
  97                 tmpdir());
  98         if (!tmp_name) {
  99                 status = NT_STATUS_NO_MEMORY;
 100                 goto out;
 101         }
 102
 103         mask = umask(S_IRWXO | S_IRWXG);
 104         tmp_fd = mkstemp(tmp_name);
 105         umask(mask);
 106         if (tmp_fd == -1) {
 107                 status = NT_STATUS_ACCESS_DENIED;
 108                 goto out;
 109         }
 110
 111         if (!convert_string_talloc(mem_ctx, CH_UTF16LE, CH_UNIX, data_in, n,
 112                                    (void *)&data_out, &converted_size))
 113         {
 114                 status = NT_STATUS_INVALID_BUFFER_SIZE;
 115                 goto out;
 116         }
 117
 118         /* skip utf8 BOM */
 119         DEBUG(11,("convert_file_from_ucs2: "
 120                "data_out[0]: 0x%x, data_out[1]: 0x%x, data_out[2]: 0x%x\n",
 121                 data_out[0], data_out[1], data_out[2]));
 122
 123         if ((data_out[0] == 0xef) && (data_out[1] == 0xbb) &&
 124             (data_out[2] == 0xbf)) {
 125                 DEBUG(11,("convert_file_from_ucs2: "
 126                          "%s skipping utf8 BOM\n", tmp_name));
 127                 data_out += 3;
 128                 converted_size -= 3;
 129         }
 130
 131         if (write(tmp_fd, data_out, converted_size) != converted_size) {
 132                 status = map_nt_error_from_unix_common(errno);
 133                 goto out;
 134         }
 135
 136         *filename_out = tmp_name;
 137
 138         status = NT_STATUS_OK;
 139
 140  out:
 141         if (tmp_fd != -1) {
 142                 close(tmp_fd);
 143         }
 144
 145         talloc_free(data_in);
 146
 147         return status;
 148 }
 149
 150 /****************************************************************
 151 ****************************************************************/
 152
 153 NTSTATUS gp_inifile_getstring(struct gp_inifile_context *ctx, const char *key, char **ret)
 154 {
 155         int i;
 156
 157         for (i = 0; i < ctx->keyval_count; i++) {
 158                 if (strcmp(ctx->data[i]->key, key) == 0) {
 159                         if (ret) {
 160                                 *ret = ctx->data[i]->val;
 161                         }
 162                         return NT_STATUS_OK;
 163                 }
 164         }
 165         return NT_STATUS_NOT_FOUND;
 166 }
 167
 168 /****************************************************************
 169 ****************************************************************/
 170
 171 NTSTATUS gp_inifile_getint(struct gp_inifile_context *ctx, const char *key, int *ret)
 172 {
 173         char *value;
 174         NTSTATUS result;
 175
 176         result = gp_inifile_getstring(ctx,key, &value);
 177         if (!NT_STATUS_IS_OK(result)) {
 178                 return result;
 179         }
 180
 181         if (ret) {
 182                 *ret = (int)strtol(value, NULL, 10);
 183         }
 184         return NT_STATUS_OK;
 185 }
 186
 187 /****************************************************************
 188 ****************************************************************/
 189
 190 NTSTATUS gp_inifile_getbool(struct gp_inifile_context *ctx, const char *key, bool *ret)
 191 {
 192         char *value;
 193         NTSTATUS result;
 194
 195         result = gp_inifile_getstring(ctx,key, &value);
 196         if (!NT_STATUS_IS_OK(result)) {
 197                 return result;
 198         }
 199
 200         if (strequal(value, "Yes") ||
 201             strequal(value, "True")) {
 202                 if (ret) {
 203                         *ret = true;
 204                 }
 205                 return NT_STATUS_OK;
 206         } else if (strequal(value, "No") ||
 207                    strequal(value, "False")) {
 208                 if (ret) {
 209                         *ret = false;
 210                 }
 211                 return NT_STATUS_OK;
 212         }
 213
 214         return NT_STATUS_NOT_FOUND;
 215 }
 216
 217 /****************************************************************
 218 ****************************************************************/
 219
 220 NTSTATUS gp_inifile_init_context(TALLOC_CTX *mem_ctx,
 221                                  uint32_t flags,
 222                                  const char *unix_path,
 223                                  const char *suffix,
 224                                  struct gp_inifile_context **ctx_ret)
 225 {
 226         struct gp_inifile_context *ctx = NULL;
 227         NTSTATUS status;
 228         int rv;
 229         char *tmp_filename = NULL;
 230         const char *ini_filename = NULL;
 231
 232         if (!unix_path || !ctx_ret) {
 233                 return NT_STATUS_INVALID_PARAMETER;
 234         }
 235
 236         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 237         NT_STATUS_HAVE_NO_MEMORY(ctx);
 238
 239         status = gp_find_file(mem_ctx, flags, unix_path, suffix,
 240                               &ini_filename);
 241
 242         if (!NT_STATUS_IS_OK(status)) {
 243                 goto failed;
 244         }
 245
 246         status = convert_file_from_ucs2(mem_ctx, ini_filename,
 247                                         &tmp_filename);
 248         if (!NT_STATUS_IS_OK(status)) {
 249                 goto failed;
 250         }
 251
 252         rv = pm_process(tmp_filename, change_section, store_keyval_pair, ctx);
 253         if (!rv) {
 254                 return NT_STATUS_NO_SUCH_FILE;
 255         }
 256
 257
 258         ctx->generated_filename = tmp_filename;
 259         ctx->mem_ctx = mem_ctx;
 260
 261         *ctx_ret = ctx;
 262
 263         return NT_STATUS_OK;
 264
 265  failed:
 266
 267         DEBUG(1,("gp_inifile_init_context failed: %s\n",
 268                 nt_errstr(status)));
 269
 270         talloc_free(ctx);
 271
 272         return status;
 273 }
 274
 275 /****************************************************************
 276  parse the local gpt.ini file
 277 ****************************************************************/
 278
 279 #define GPT_INI_SECTION_GENERAL "General"
 280 #define GPT_INI_PARAMETER_VERSION "Version"
 281 #define GPT_INI_PARAMETER_DISPLAYNAME "displayName"
 282
 283 NTSTATUS parse_gpt_ini(TALLOC_CTX *mem_ctx,
 284                        const char *filename,
 285                        uint32_t *version,
 286                        char **display_name)
 287 {
 288         NTSTATUS result;
 289         int rv;
 290         int v = 0;
 291         char *name = NULL;
 292         struct gp_inifile_context *ctx;
 293
 294         if (!filename) {
 295                 return NT_STATUS_INVALID_PARAMETER;
 296         }
 297
 298         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 299         NT_STATUS_HAVE_NO_MEMORY(ctx);
 300
 301         rv = pm_process(filename, change_section, store_keyval_pair, ctx);
 302         if (!rv) {
 303                 return NT_STATUS_NO_SUCH_FILE;
 304         }
 305
 306
 307         result = gp_inifile_getstring(ctx, GPT_INI_SECTION_GENERAL
 308                         ":"GPT_INI_PARAMETER_DISPLAYNAME, &name);
 309         if (!NT_STATUS_IS_OK(result)) {
 310                 /* the default domain policy and the default domain controller
 311                  * policy never have a displayname in their gpt.ini file */
 312                 DEBUG(10,("parse_gpt_ini: no name in %s\n", filename));
 313         }
 314
 315         if (name && display_name) {
 316                 *display_name = talloc_strdup(ctx, name);
 317                 if (*display_name == NULL) {
 318                         return NT_STATUS_NO_MEMORY;
 319                 }
 320         }
 321
 322         result = gp_inifile_getint(ctx, GPT_INI_SECTION_GENERAL
 323                         ":"GPT_INI_PARAMETER_VERSION, &v);
 324         if (!NT_STATUS_IS_OK(result)) {
 325                 DEBUG(10,("parse_gpt_ini: no version\n"));
 326                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 327         }
 328
 329         if (version) {
 330                 *version = v;
 331         }
 332
 333         talloc_free(ctx);
 334
 335         return NT_STATUS_OK;
 336 }