source4/dsdb/schema/schema_convert_to_ol.c

   1 /*
   2    schema conversion routines
   3
   4    Copyright (C) Andrew Bartlett 2006-2008
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18
  19 */
  20
  21 #include "includes.h"
  22 #include "ldb.h"
  23 #include "dsdb/samdb/samdb.h"
  24 #include "system/locale.h"
  25
  26 #define SEPERATOR "\n  "
  27
  28 struct attr_map {
  29         char *old_attr;
  30         char *new_attr;
  31 };
  32
  33 struct oid_map {
  34         char *old_oid;
  35         char *new_oid;
  36 };
  37
  38 static char *print_schema_recursive(char *append_to_string, struct dsdb_schema *schema, const char *print_class,
  39                                     enum dsdb_schema_convert_target target,
  40                                     const char **attrs_skip, const struct attr_map *attr_map, const struct oid_map *oid_map)
  41 {
  42         char *out = append_to_string;
  43         const struct dsdb_class *objectclass;
  44         objectclass = dsdb_class_by_lDAPDisplayName(schema, print_class);
  45         if (!objectclass) {
  46                 DEBUG(0, ("Cannot find class %s in schema\n", print_class));
  47                 return NULL;
  48         }
  49
  50         do {
  51                 TALLOC_CTX *mem_ctx = talloc_new(append_to_string);
  52                 const char *name = objectclass->lDAPDisplayName;
  53                 const char *oid = objectclass->governsID_oid;
  54                 const char *subClassOf = objectclass->subClassOf;
  55                 int objectClassCategory = objectclass->objectClassCategory;
  56                 const char **must;
  57                 const char **may;
  58                 char *schema_entry = NULL;
  59                 struct ldb_val objectclass_name_as_ldb_val = data_blob_string_const(objectclass->lDAPDisplayName);
  60                 struct ldb_message_element objectclass_name_as_el = {
  61                         .name = "objectClass",
  62                         .num_values = 1,
  63                         .values = &objectclass_name_as_ldb_val
  64                 };
  65                 unsigned int j;
  66                 unsigned int attr_idx;
  67
  68                 if (!mem_ctx) {
  69                         DEBUG(0, ("Failed to create new talloc context\n"));
  70                         return NULL;
  71                 }
  72
  73                 /* We have been asked to skip some attributes/objectClasses */
  74                 if (attrs_skip && str_list_check_ci(attrs_skip, name)) {
  75                         continue;
  76                 }
  77
  78                 /* We might have been asked to remap this oid, due to a conflict */
  79                 for (j=0; oid_map && oid_map[j].old_oid; j++) {
  80                         if (strcasecmp(oid, oid_map[j].old_oid) == 0) {
  81                                 oid =  oid_map[j].new_oid;
  82                                 break;
  83                         }
  84                 }
  85
  86                 /* We might have been asked to remap this name, due to a conflict */
  87                 for (j=0; name && attr_map && attr_map[j].old_attr; j++) {
  88                         if (strcasecmp(name, attr_map[j].old_attr) == 0) {
  89                                 name =  attr_map[j].new_attr;
  90                                 break;
  91                         }
  92                 }
  93
  94                 /* We might have been asked to remap this subClassOf, due to a conflict */
  95                 for (j=0; subClassOf && attr_map && attr_map[j].old_attr; j++) {
  96                         if (strcasecmp(subClassOf, attr_map[j].old_attr) == 0) {
  97                                 subClassOf =  attr_map[j].new_attr;
  98                                 break;
  99                         }
 100                 }
 101
 102                 may = dsdb_full_attribute_list(mem_ctx, schema, &objectclass_name_as_el, DSDB_SCHEMA_ALL_MAY);
 103
 104                 for (j=0; may && may[j]; j++) {
 105                         /* We might have been asked to remap this name, due to a conflict */
 106                         for (attr_idx=0; attr_map && attr_map[attr_idx].old_attr; attr_idx++) {
 107                                 if (strcasecmp(may[j], attr_map[attr_idx].old_attr) == 0) {
 108                                         may[j] =  attr_map[attr_idx].new_attr;
 109                                         break;
 110                                 }
 111                         }
 112                 }
 113
 114                 must = dsdb_full_attribute_list(mem_ctx, schema, &objectclass_name_as_el, DSDB_SCHEMA_ALL_MUST);
 115
 116                 for (j=0; must && must[j]; j++) {
 117                         /* We might have been asked to remap this name, due to a conflict */
 118                         for (attr_idx=0; attr_map && attr_map[attr_idx].old_attr; attr_idx++) {
 119                                 if (strcasecmp(must[j], attr_map[attr_idx].old_attr) == 0) {
 120                                         must[j] =  attr_map[attr_idx].new_attr;
 121                                         break;
 122                                 }
 123                         }
 124                 }
 125
 126                 schema_entry = schema_class_description(mem_ctx, target,
 127                                                         SEPERATOR,
 128                                                         oid,
 129                                                         name,
 130                                                         NULL,
 131                                                         subClassOf,
 132                                                         objectClassCategory,
 133                                                         must,
 134                                                         may,
 135                                                         NULL);
 136                 if (schema_entry == NULL) {
 137                         DEBUG(0, ("failed to generate schema description for %s\n", name));
 138                         return NULL;
 139                 }
 140
 141                 switch (target) {
 142                 case TARGET_OPENLDAP:
 143                         out = talloc_asprintf_append(out, "objectclass %s\n\n", schema_entry);
 144                         break;
 145                 case TARGET_FEDORA_DS:
 146                         out = talloc_asprintf_append(out, "objectClasses: %s\n", schema_entry);
 147                         break;
 148                 default:
 149                         DEBUG(0, ("Wrong type of target!\n"));
 150                         return NULL;
 151                 }
 152                 talloc_free(mem_ctx);
 153         } while (0);
 154
 155
 156         for (objectclass=schema->classes; objectclass; objectclass = objectclass->next) {
 157                 if (ldb_attr_cmp(objectclass->subClassOf, print_class) == 0
 158                     && ldb_attr_cmp(objectclass->lDAPDisplayName, print_class) != 0) {
 159                         out = print_schema_recursive(out, schema, objectclass->lDAPDisplayName,
 160                                                      target, attrs_skip, attr_map, oid_map);
 161                 }
 162         }
 163         return out;
 164 }
 165
 166 /* Routine to linearise our internal schema into the format that
 167    OpenLDAP and Fedora DS use for their backend.
 168
 169    The 'mappings' are of a format like:
 170
 171 #Standard OpenLDAP attributes
 172 labeledURI
 173 #The memberOf plugin provides this attribute
 174 memberOf
 175 #These conflict with OpenLDAP builtins
 176 attributeTypes:samba4AttributeTypes
 177 2.5.21.5:1.3.6.1.4.1.7165.4.255.7
 178
 179 */
 180
 181
 182 char *dsdb_convert_schema_to_openldap(struct ldb_context *ldb, char *target_str, const char *mappings)
 183 {
 184         /* Read list of attributes to skip, OIDs to map */
 185         TALLOC_CTX *mem_ctx = talloc_new(ldb);
 186         char *line;
 187         char *out;
 188         const char **attrs_skip = NULL;
 189         unsigned int num_skip = 0;
 190         struct oid_map *oid_map = NULL;
 191         unsigned int num_oid_maps = 0;
 192         struct attr_map *attr_map = NULL;
 193         unsigned int num_attr_maps = 0;
 194         struct dsdb_attribute *attribute;
 195         struct dsdb_schema *schema;
 196         enum dsdb_schema_convert_target target;
 197
 198         char *next_line = talloc_strdup(mem_ctx, mappings);
 199
 200         if (!target_str || strcasecmp(target_str, "openldap") == 0) {
 201                 target = TARGET_OPENLDAP;
 202         } else if (strcasecmp(target_str, "fedora-ds") == 0) {
 203                 target = TARGET_FEDORA_DS;
 204         } else {
 205                 DEBUG(0, ("Invalid target type for schema conversion %s\n", target_str));
 206                 return NULL;
 207         }
 208
 209         /* The mappings are line-seperated, and specify details such as OIDs to skip etc */
 210         while (1) {
 211                 line = next_line;
 212                 next_line = strchr(line, '\n');
 213                 if (!next_line) {
 214                         break;
 215                 }
 216                 next_line[0] = '\0';
 217                 next_line++;
 218
 219                 /* Blank Line */
 220                 if (line[0] == '\0') {
 221                         continue;
 222                 }
 223                 /* Comment */
 224                 if (line[0] == '#') {
 225                         continue;
 226                 }
 227
 228                 if (isdigit(line[0])) {
 229                         char *p = strchr(line, ':');
 230                         if (!p) {
 231                                 DEBUG(0, ("schema mapping file line has OID but no OID to map to: %s\n", line));
 232                                 return NULL;
 233                         }
 234                         p[0] = '\0';
 235                         p++;
 236                         oid_map = talloc_realloc(mem_ctx, oid_map, struct oid_map, num_oid_maps + 2);
 237                         trim_string(line, " ", " ");
 238                         oid_map[num_oid_maps].old_oid = talloc_strdup(oid_map, line);
 239                         trim_string(p, " ", " ");
 240                         oid_map[num_oid_maps].new_oid = p;
 241                         num_oid_maps++;
 242                         oid_map[num_oid_maps].old_oid = NULL;
 243                 } else {
 244                         char *p = strchr(line, ':');
 245                         if (p) {
 246                                 /* remap attribute/objectClass */
 247                                 p[0] = '\0';
 248                                 p++;
 249                                 attr_map = talloc_realloc(mem_ctx, attr_map, struct attr_map, num_attr_maps + 2);
 250                                 trim_string(line, " ", " ");
 251                                 attr_map[num_attr_maps].old_attr = talloc_strdup(attr_map, line);
 252                                 trim_string(p, " ", " ");
 253                                 attr_map[num_attr_maps].new_attr = p;
 254                                 num_attr_maps++;
 255                                 attr_map[num_attr_maps].old_attr = NULL;
 256                         } else {
 257                                 /* skip attribute/objectClass */
 258                                 attrs_skip = talloc_realloc(mem_ctx, attrs_skip, const char *, num_skip + 2);
 259                                 trim_string(line, " ", " ");
 260                                 attrs_skip[num_skip] = talloc_strdup(attrs_skip, line);
 261                                 num_skip++;
 262                                 attrs_skip[num_skip] = NULL;
 263                         }
 264                 }
 265         }
 266
 267         schema = dsdb_get_schema(ldb, mem_ctx);
 268         if (!schema) {
 269                 DEBUG(0, ("No schema on ldb to convert!\n"));
 270                 return NULL;
 271         }
 272
 273         switch (target) {
 274         case TARGET_OPENLDAP:
 275                 out = talloc_strdup(mem_ctx, "");
 276                 break;
 277         case TARGET_FEDORA_DS:
 278                 out = talloc_strdup(mem_ctx, "dn: cn=schema\n");
 279                 break;
 280         default:
 281                 DEBUG(0, ("Wrong type of target!\n"));
 282                 return NULL;
 283         }
 284
 285         for (attribute=schema->attributes; attribute; attribute = attribute->next) {
 286                 const char *name = attribute->lDAPDisplayName;
 287                 const char *oid = attribute->attributeID_oid;
 288                 const char *syntax = attribute->attributeSyntax_oid;
 289                 const char *equality = NULL, *substring = NULL;
 290                 bool single_value = attribute->isSingleValued;
 291
 292                 char *schema_entry = NULL;
 293                 unsigned int j;
 294
 295                 /* We have been asked to skip some attributes/objectClasses */
 296                 if (attrs_skip && str_list_check_ci(attrs_skip, name)) {
 297                         continue;
 298                 }
 299
 300                 /* We might have been asked to remap this oid, due to a conflict */
 301                 for (j=0; oid && oid_map && oid_map[j].old_oid; j++) {
 302                         if (strcasecmp(oid, oid_map[j].old_oid) == 0) {
 303                                 oid =  oid_map[j].new_oid;
 304                                 break;
 305                         }
 306                 }
 307
 308                 if (attribute->syntax) {
 309                         /* We might have been asked to remap this oid,
 310                          * due to a conflict, or lack of
 311                          * implementation */
 312                         syntax = attribute->syntax->ldap_oid;
 313                         /* We might have been asked to remap this oid, due to a conflict */
 314                         for (j=0; syntax && oid_map && oid_map[j].old_oid; j++) {
 315                                 if (strcasecmp(syntax, oid_map[j].old_oid) == 0) {
 316                                         syntax =  oid_map[j].new_oid;
 317                                         break;
 318                                 }
 319                         }
 320
 321                         equality = attribute->syntax->equality;
 322                         substring = attribute->syntax->substring;
 323                 }
 324
 325                 /* We might have been asked to remap this name, due to a conflict */
 326                 for (j=0; name && attr_map && attr_map[j].old_attr; j++) {
 327                         if (strcasecmp(name, attr_map[j].old_attr) == 0) {
 328                                 name =  attr_map[j].new_attr;
 329                                 break;
 330                         }
 331                 }
 332
 333                 schema_entry = schema_attribute_description(mem_ctx,
 334                                                             target,
 335                                                             SEPERATOR,
 336                                                             oid,
 337                                                             name,
 338                                                             equality,
 339                                                             substring,
 340                                                             syntax,
 341                                                             single_value,
 342                                                             false,
 343                                                             NULL, NULL,
 344                                                             NULL, NULL,
 345                                                             false, false);
 346
 347                 if (schema_entry == NULL) {
 348                         DEBUG(0, ("failed to generate attribute description for %s\n", name));
 349                         return NULL;
 350                 }
 351
 352                 switch (target) {
 353                 case TARGET_OPENLDAP:
 354                         out = talloc_asprintf_append(out, "attributetype %s\n\n", schema_entry);
 355                         break;
 356                 case TARGET_FEDORA_DS:
 357                         out = talloc_asprintf_append(out, "attributeTypes: %s\n", schema_entry);
 358                         break;
 359                 default:
 360                         DEBUG(0, ("Wrong type of target!\n"));
 361                         return NULL;
 362                 }
 363         }
 364
 365         out = print_schema_recursive(out, schema, "top", target, attrs_skip, attr_map, oid_map);
 366
 367         return out;
 368 }
 369