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                 if (ret) {
 202                         *ret = true;
 203                 }
 204                 return NT_STATUS_OK;
 205         } else if (strequal(value, "No")) {
 206                 if (ret) {
 207                         *ret = false;
 208                 }
 209                 return NT_STATUS_OK;
 210         }
 211
 212         return NT_STATUS_NOT_FOUND;
 213 }
 214
 215 /****************************************************************
 216 ****************************************************************/
 217
 218 NTSTATUS gp_inifile_init_context(TALLOC_CTX *mem_ctx,
 219                                  uint32_t flags,
 220                                  const char *unix_path,
 221                                  const char *suffix,
 222                                  struct gp_inifile_context **ctx_ret)
 223 {
 224         struct gp_inifile_context *ctx = NULL;
 225         NTSTATUS status;
 226         int rv;
 227         char *tmp_filename = NULL;
 228         const char *ini_filename = NULL;
 229
 230         if (!unix_path || !ctx_ret) {
 231                 return NT_STATUS_INVALID_PARAMETER;
 232         }
 233
 234         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 235         NT_STATUS_HAVE_NO_MEMORY(ctx);
 236
 237         status = gp_find_file(mem_ctx, flags, unix_path, suffix,
 238                               &ini_filename);
 239
 240         if (!NT_STATUS_IS_OK(status)) {
 241                 goto failed;
 242         }
 243
 244         status = convert_file_from_ucs2(mem_ctx, ini_filename,
 245                                         &tmp_filename);
 246         if (!NT_STATUS_IS_OK(status)) {
 247                 goto failed;
 248         }
 249
 250         rv = pm_process(tmp_filename, change_section, store_keyval_pair, ctx);
 251         if (!rv) {
 252                 return NT_STATUS_NO_SUCH_FILE;
 253         }
 254
 255
 256         ctx->generated_filename = tmp_filename;
 257         ctx->mem_ctx = mem_ctx;
 258
 259         *ctx_ret = ctx;
 260
 261         return NT_STATUS_OK;
 262
 263  failed:
 264
 265         DEBUG(1,("gp_inifile_init_context failed: %s\n",
 266                 nt_errstr(status)));
 267
 268         talloc_free(ctx);
 269
 270         return status;
 271 }
 272
 273 /****************************************************************
 274  parse the local gpt.ini file
 275 ****************************************************************/
 276
 277 #define GPT_INI_SECTION_GENERAL "General"
 278 #define GPT_INI_PARAMETER_VERSION "Version"
 279 #define GPT_INI_PARAMETER_DISPLAYNAME "displayName"
 280
 281 NTSTATUS parse_gpt_ini(TALLOC_CTX *mem_ctx,
 282                        const char *filename,
 283                        uint32_t *version,
 284                        char **display_name)
 285 {
 286         NTSTATUS result;
 287         int rv;
 288         int v = 0;
 289         char *name = NULL;
 290         struct gp_inifile_context *ctx;
 291
 292         if (!filename) {
 293                 return NT_STATUS_INVALID_PARAMETER;
 294         }
 295
 296         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 297         NT_STATUS_HAVE_NO_MEMORY(ctx);
 298
 299         rv = pm_process(filename, change_section, store_keyval_pair, ctx);
 300         if (!rv) {
 301                 return NT_STATUS_NO_SUCH_FILE;
 302         }
 303
 304
 305         result = gp_inifile_getstring(ctx, GPT_INI_SECTION_GENERAL
 306                         ":"GPT_INI_PARAMETER_DISPLAYNAME, &name);
 307         if (!NT_STATUS_IS_OK(result)) {
 308                 /* the default domain policy and the default domain controller
 309                  * policy never have a displayname in their gpt.ini file */
 310                 DEBUG(10,("parse_gpt_ini: no name in %s\n", filename));
 311         }
 312
 313         if (name && display_name) {
 314                 *display_name = talloc_strdup(ctx, name);
 315                 if (*display_name == NULL) {
 316                         return NT_STATUS_NO_MEMORY;
 317                 }
 318         }
 319
 320         result = gp_inifile_getint(ctx, GPT_INI_SECTION_GENERAL
 321                         ":"GPT_INI_PARAMETER_VERSION, &v);
 322         if (!NT_STATUS_IS_OK(result)) {
 323                 DEBUG(10,("parse_gpt_ini: no version\n"));
 324                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 325         }
 326
 327         if (version) {
 328                 *version = v;
 329         }
 330
 331         talloc_free(ctx);
 332
 333         return NT_STATUS_OK;
 334 }