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