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         return true;
  36 }
  37
  38 /****************************************************************
  39 ****************************************************************/
  40
  41 static bool store_keyval_pair(const char *key, const char *value, void *ctx_ptr)
  42 {
  43         struct gp_inifile_context *ctx = (struct gp_inifile_context *) ctx_ptr;
  44         ctx->data = talloc_realloc(ctx, ctx->data, struct keyval_pair *, ctx->keyval_count+1);
  45         ctx->data[ctx->keyval_count] = talloc_zero(ctx, struct keyval_pair);
  46         ctx->data[ctx->keyval_count]->key = talloc_asprintf(ctx, "%s:%s", ctx->current_section, key);
  47         ctx->data[ctx->keyval_count]->val = talloc_strdup(ctx, value);
  48         ctx->keyval_count++;
  49         return true;
  50 }
  51
  52 /****************************************************************
  53 ****************************************************************/
  54
  55 static NTSTATUS convert_file_from_ucs2(TALLOC_CTX *mem_ctx,
  56                                        const char *filename_in,
  57                                        char **filename_out)
  58 {
  59         int tmp_fd = -1;
  60         uint8_t *data_in = NULL;
  61         uint8_t *data_out = NULL;
  62         char *tmp_name = NULL;
  63         NTSTATUS status;
  64         size_t n = 0;
  65         size_t converted_size;
  66
  67         if (!filename_out) {
  68                 return NT_STATUS_INVALID_PARAMETER;
  69         }
  70
  71         data_in = (uint8_t *)file_load(filename_in, &n, 0, NULL);
  72         if (!data_in) {
  73                 status = NT_STATUS_NO_SUCH_FILE;
  74                 goto out;
  75         }
  76
  77         tmp_name = talloc_asprintf(mem_ctx, "%s/convert_file_from_ucs2.XXXXXX",
  78                 tmpdir());
  79         if (!tmp_name) {
  80                 status = NT_STATUS_NO_MEMORY;
  81                 goto out;
  82         }
  83
  84         tmp_fd = mkstemp(tmp_name);
  85         if (tmp_fd == -1) {
  86                 status = NT_STATUS_ACCESS_DENIED;
  87                 goto out;
  88         }
  89
  90         if (!convert_string_talloc(mem_ctx, CH_UTF16LE, CH_UNIX, data_in, n,
  91                                    (void *)&data_out, &converted_size))
  92         {
  93                 status = NT_STATUS_INVALID_BUFFER_SIZE;
  94                 goto out;
  95         }
  96
  97         /* skip utf8 BOM */
  98         DEBUG(11,("convert_file_from_ucs2: "
  99                "data_out[0]: 0x%x, data_out[1]: 0x%x, data_out[2]: 0x%x\n",
 100                 data_out[0], data_out[1], data_out[2]));
 101
 102         if ((data_out[0] == 0xef) && (data_out[1] == 0xbb) &&
 103             (data_out[2] == 0xbf)) {
 104                 DEBUG(11,("convert_file_from_ucs2: "
 105                          "%s skipping utf8 BOM\n", tmp_name));
 106                 data_out += 3;
 107                 converted_size -= 3;
 108         }
 109
 110         if (write(tmp_fd, data_out, converted_size) != converted_size) {
 111                 status = map_nt_error_from_unix_common(errno);
 112                 goto out;
 113         }
 114
 115         *filename_out = tmp_name;
 116
 117         status = NT_STATUS_OK;
 118
 119  out:
 120         if (tmp_fd != -1) {
 121                 close(tmp_fd);
 122         }
 123
 124         talloc_free(data_in);
 125
 126         return status;
 127 }
 128
 129 /****************************************************************
 130 ****************************************************************/
 131
 132 NTSTATUS gp_inifile_getstring(struct gp_inifile_context *ctx, const char *key, char **ret)
 133 {
 134         int i;
 135
 136         for (i = 0; i < ctx->keyval_count; i++) {
 137                 if (strcmp(ctx->data[i]->key, key) == 0) {
 138                         *ret = ctx->data[i]->val;
 139                         return NT_STATUS_OK;
 140                 }
 141         }
 142         return NT_STATUS_NOT_FOUND;
 143 }
 144
 145 /****************************************************************
 146 ****************************************************************/
 147
 148 NTSTATUS gp_inifile_getint(struct gp_inifile_context *ctx, const char *key, int *ret)
 149 {
 150         char *value;
 151         NTSTATUS result;
 152
 153         result = gp_inifile_getstring(ctx,key, &value);
 154         if (!NT_STATUS_IS_OK(result)) {
 155                 return result;
 156         }
 157
 158         *ret = (int)strtol(value, NULL, 10);
 159         return NT_STATUS_OK;
 160 }
 161
 162 /****************************************************************
 163 ****************************************************************/
 164
 165 NTSTATUS gp_inifile_init_context(TALLOC_CTX *mem_ctx,
 166                                  uint32_t flags,
 167                                  const char *unix_path,
 168                                  const char *suffix,
 169                                  struct gp_inifile_context **ctx_ret)
 170 {
 171         struct gp_inifile_context *ctx = NULL;
 172         NTSTATUS status;
 173         int rv;
 174         char *tmp_filename = NULL;
 175         const char *ini_filename = NULL;
 176
 177         if (!unix_path || !ctx_ret) {
 178                 return NT_STATUS_INVALID_PARAMETER;
 179         }
 180
 181         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 182         NT_STATUS_HAVE_NO_MEMORY(ctx);
 183
 184         status = gp_find_file(mem_ctx, flags, unix_path, suffix,
 185                               &ini_filename);
 186
 187         if (!NT_STATUS_IS_OK(status)) {
 188                 goto failed;
 189         }
 190
 191         status = convert_file_from_ucs2(mem_ctx, ini_filename,
 192                                         &tmp_filename);
 193         if (!NT_STATUS_IS_OK(status)) {
 194                 goto failed;
 195         }
 196
 197         rv = pm_process(tmp_filename, change_section, store_keyval_pair, ctx);
 198         if (!rv) {
 199                 return NT_STATUS_NO_SUCH_FILE;
 200         }
 201
 202
 203         ctx->generated_filename = tmp_filename;
 204         ctx->mem_ctx = mem_ctx;
 205
 206         *ctx_ret = ctx;
 207
 208         return NT_STATUS_OK;
 209
 210  failed:
 211
 212         DEBUG(1,("gp_inifile_init_context failed: %s\n",
 213                 nt_errstr(status)));
 214
 215         talloc_free(ctx);
 216
 217         return status;
 218 }
 219
 220 /****************************************************************
 221  parse the local gpt.ini file
 222 ****************************************************************/
 223
 224 #define GPT_INI_SECTION_GENERAL "General"
 225 #define GPT_INI_PARAMETER_VERSION "Version"
 226 #define GPT_INI_PARAMETER_DISPLAYNAME "displayName"
 227
 228 NTSTATUS parse_gpt_ini(TALLOC_CTX *mem_ctx,
 229                        const char *filename,
 230                        uint32_t *version,
 231                        char **display_name)
 232 {
 233         NTSTATUS result;
 234         int rv;
 235         int v = 0;
 236         char *name = NULL;
 237         struct gp_inifile_context *ctx;
 238
 239         if (!filename) {
 240                 return NT_STATUS_INVALID_PARAMETER;
 241         }
 242
 243         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 244         NT_STATUS_HAVE_NO_MEMORY(ctx);
 245
 246         rv = pm_process(filename, change_section, store_keyval_pair, ctx);
 247         if (!rv) {
 248                 return NT_STATUS_NO_SUCH_FILE;
 249         }
 250
 251
 252         result = gp_inifile_getstring(ctx, GPT_INI_SECTION_GENERAL
 253                         ":"GPT_INI_PARAMETER_DISPLAYNAME, &name);
 254         if (!NT_STATUS_IS_OK(result)) {
 255                 /* the default domain policy and the default domain controller
 256                  * policy never have a displayname in their gpt.ini file */
 257                 DEBUG(10,("parse_gpt_ini: no name in %s\n", filename));
 258         }
 259
 260         if (name && display_name) {
 261                 *display_name = talloc_strdup(ctx, name);
 262                 if (*display_name == NULL) {
 263                         return NT_STATUS_NO_MEMORY;
 264                 }
 265         }
 266
 267         result = gp_inifile_getint(ctx, GPT_INI_SECTION_GENERAL
 268                         ":"GPT_INI_PARAMETER_VERSION, &v);
 269         if (!NT_STATUS_IS_OK(result)) {
 270                 DEBUG(10,("parse_gpt_ini: no version\n"));
 271                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 272         }
 273
 274         if (version) {
 275                 *version = v;
 276         }
 277
 278         talloc_free(ctx);
 279
 280         return NT_STATUS_OK;
 281 }