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         mode_t mask;
  67
  68         if (!filename_out) {
  69                 return NT_STATUS_INVALID_PARAMETER;
  70         }
  71
  72         data_in = (uint8_t *)file_load(filename_in, &n, 0, NULL);
  73         if (!data_in) {
  74                 status = NT_STATUS_NO_SUCH_FILE;
  75                 goto out;
  76         }
  77
  78         tmp_name = talloc_asprintf(mem_ctx, "%s/convert_file_from_ucs2.XXXXXX",
  79                 tmpdir());
  80         if (!tmp_name) {
  81                 status = NT_STATUS_NO_MEMORY;
  82                 goto out;
  83         }
  84
  85         mask = umask(S_IRWXO | S_IRWXG);
  86         tmp_fd = mkstemp(tmp_name);
  87         umask(mask);
  88         if (tmp_fd == -1) {
  89                 status = NT_STATUS_ACCESS_DENIED;
  90                 goto out;
  91         }
  92
  93         if (!convert_string_talloc(mem_ctx, CH_UTF16LE, CH_UNIX, data_in, n,
  94                                    (void *)&data_out, &converted_size))
  95         {
  96                 status = NT_STATUS_INVALID_BUFFER_SIZE;
  97                 goto out;
  98         }
  99
 100         /* skip utf8 BOM */
 101         DEBUG(11,("convert_file_from_ucs2: "
 102                "data_out[0]: 0x%x, data_out[1]: 0x%x, data_out[2]: 0x%x\n",
 103                 data_out[0], data_out[1], data_out[2]));
 104
 105         if ((data_out[0] == 0xef) && (data_out[1] == 0xbb) &&
 106             (data_out[2] == 0xbf)) {
 107                 DEBUG(11,("convert_file_from_ucs2: "
 108                          "%s skipping utf8 BOM\n", tmp_name));
 109                 data_out += 3;
 110                 converted_size -= 3;
 111         }
 112
 113         if (write(tmp_fd, data_out, converted_size) != converted_size) {
 114                 status = map_nt_error_from_unix_common(errno);
 115                 goto out;
 116         }
 117
 118         *filename_out = tmp_name;
 119
 120         status = NT_STATUS_OK;
 121
 122  out:
 123         if (tmp_fd != -1) {
 124                 close(tmp_fd);
 125         }
 126
 127         talloc_free(data_in);
 128
 129         return status;
 130 }
 131
 132 /****************************************************************
 133 ****************************************************************/
 134
 135 NTSTATUS gp_inifile_getstring(struct gp_inifile_context *ctx, const char *key, char **ret)
 136 {
 137         int i;
 138
 139         for (i = 0; i < ctx->keyval_count; i++) {
 140                 if (strcmp(ctx->data[i]->key, key) == 0) {
 141                         *ret = ctx->data[i]->val;
 142                         return NT_STATUS_OK;
 143                 }
 144         }
 145         return NT_STATUS_NOT_FOUND;
 146 }
 147
 148 /****************************************************************
 149 ****************************************************************/
 150
 151 NTSTATUS gp_inifile_getint(struct gp_inifile_context *ctx, const char *key, int *ret)
 152 {
 153         char *value;
 154         NTSTATUS result;
 155
 156         result = gp_inifile_getstring(ctx,key, &value);
 157         if (!NT_STATUS_IS_OK(result)) {
 158                 return result;
 159         }
 160
 161         *ret = (int)strtol(value, NULL, 10);
 162         return NT_STATUS_OK;
 163 }
 164
 165 /****************************************************************
 166 ****************************************************************/
 167
 168 NTSTATUS gp_inifile_init_context(TALLOC_CTX *mem_ctx,
 169                                  uint32_t flags,
 170                                  const char *unix_path,
 171                                  const char *suffix,
 172                                  struct gp_inifile_context **ctx_ret)
 173 {
 174         struct gp_inifile_context *ctx = NULL;
 175         NTSTATUS status;
 176         int rv;
 177         char *tmp_filename = NULL;
 178         const char *ini_filename = NULL;
 179
 180         if (!unix_path || !ctx_ret) {
 181                 return NT_STATUS_INVALID_PARAMETER;
 182         }
 183
 184         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 185         NT_STATUS_HAVE_NO_MEMORY(ctx);
 186
 187         status = gp_find_file(mem_ctx, flags, unix_path, suffix,
 188                               &ini_filename);
 189
 190         if (!NT_STATUS_IS_OK(status)) {
 191                 goto failed;
 192         }
 193
 194         status = convert_file_from_ucs2(mem_ctx, ini_filename,
 195                                         &tmp_filename);
 196         if (!NT_STATUS_IS_OK(status)) {
 197                 goto failed;
 198         }
 199
 200         rv = pm_process(tmp_filename, change_section, store_keyval_pair, ctx);
 201         if (!rv) {
 202                 return NT_STATUS_NO_SUCH_FILE;
 203         }
 204
 205
 206         ctx->generated_filename = tmp_filename;
 207         ctx->mem_ctx = mem_ctx;
 208
 209         *ctx_ret = ctx;
 210
 211         return NT_STATUS_OK;
 212
 213  failed:
 214
 215         DEBUG(1,("gp_inifile_init_context failed: %s\n",
 216                 nt_errstr(status)));
 217
 218         talloc_free(ctx);
 219
 220         return status;
 221 }
 222
 223 /****************************************************************
 224  parse the local gpt.ini file
 225 ****************************************************************/
 226
 227 #define GPT_INI_SECTION_GENERAL "General"
 228 #define GPT_INI_PARAMETER_VERSION "Version"
 229 #define GPT_INI_PARAMETER_DISPLAYNAME "displayName"
 230
 231 NTSTATUS parse_gpt_ini(TALLOC_CTX *mem_ctx,
 232                        const char *filename,
 233                        uint32_t *version,
 234                        char **display_name)
 235 {
 236         NTSTATUS result;
 237         int rv;
 238         int v = 0;
 239         char *name = NULL;
 240         struct gp_inifile_context *ctx;
 241
 242         if (!filename) {
 243                 return NT_STATUS_INVALID_PARAMETER;
 244         }
 245
 246         ctx = talloc_zero(mem_ctx, struct gp_inifile_context);
 247         NT_STATUS_HAVE_NO_MEMORY(ctx);
 248
 249         rv = pm_process(filename, change_section, store_keyval_pair, ctx);
 250         if (!rv) {
 251                 return NT_STATUS_NO_SUCH_FILE;
 252         }
 253
 254
 255         result = gp_inifile_getstring(ctx, GPT_INI_SECTION_GENERAL
 256                         ":"GPT_INI_PARAMETER_DISPLAYNAME, &name);
 257         if (!NT_STATUS_IS_OK(result)) {
 258                 /* the default domain policy and the default domain controller
 259                  * policy never have a displayname in their gpt.ini file */
 260                 DEBUG(10,("parse_gpt_ini: no name in %s\n", filename));
 261         }
 262
 263         if (name && display_name) {
 264                 *display_name = talloc_strdup(ctx, name);
 265                 if (*display_name == NULL) {
 266                         return NT_STATUS_NO_MEMORY;
 267                 }
 268         }
 269
 270         result = gp_inifile_getint(ctx, GPT_INI_SECTION_GENERAL
 271                         ":"GPT_INI_PARAMETER_VERSION, &v);
 272         if (!NT_STATUS_IS_OK(result)) {
 273                 DEBUG(10,("parse_gpt_ini: no version\n"));
 274                 return NT_STATUS_INTERNAL_DB_CORRUPTION;
 275         }
 276
 277         if (version) {
 278                 *version = v;
 279         }
 280
 281         talloc_free(ctx);
 282
 283         return NT_STATUS_OK;
 284 }