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                         talloc_free(mem_ctx);
 138                         DEBUG(0, ("failed to generate schema description for %s\n", name));
 139                         return NULL;
 140                 }
 141
 142                 switch (target) {
 143                 case TARGET_OPENLDAP:
 144                         out = talloc_asprintf_append(out, "objectclass %s\n\n", schema_entry);
 145                         break;
 146                 case TARGET_FEDORA_DS:
 147                         out = talloc_asprintf_append(out, "objectClasses: %s\n", schema_entry);
 148                         break;
 149                 default:
 150                         talloc_free(mem_ctx);
 151                         DEBUG(0,(__location__ " Wrong type of target %u!", (unsigned)target));
 152                         return NULL;
 153                 }
 154                 talloc_free(mem_ctx);
 155         } while (0);
 156
 157
 158         for (objectclass=schema->classes; objectclass; objectclass = objectclass->next) {
 159                 if (ldb_attr_cmp(objectclass->subClassOf, print_class) == 0
 160                     && ldb_attr_cmp(objectclass->lDAPDisplayName, print_class) != 0) {
 161                         out = print_schema_recursive(out, schema, objectclass->lDAPDisplayName,
 162                                                      target, attrs_skip, attr_map, oid_map);
 163                 }
 164         }
 165         return out;
 166 }
 167
 168 /* Routine to linearise our internal schema into the format that
 169    OpenLDAP and Fedora DS use for their backend.
 170
 171    The 'mappings' are of a format like:
 172
 173 #Standard OpenLDAP attributes
 174 labeledURI
 175 #The memberOf plugin provides this attribute
 176 memberOf
 177 #These conflict with OpenLDAP builtins
 178 attributeTypes:samba4AttributeTypes
 179 2.5.21.5:1.3.6.1.4.1.7165.4.255.7
 180
 181 */
 182
 183
 184 char *dsdb_convert_schema_to_openldap(struct ldb_context *ldb, char *target_str, const char *mappings)
 185 {
 186         /* Read list of attributes to skip, OIDs to map */
 187         TALLOC_CTX *mem_ctx = talloc_new(ldb);
 188         char *line;
 189         char *out;
 190         const char **attrs_skip = NULL;
 191         unsigned int num_skip = 0;
 192         struct oid_map *oid_map = NULL;
 193         unsigned int num_oid_maps = 0;
 194         struct attr_map *attr_map = NULL;
 195         unsigned int num_attr_maps = 0;
 196         struct dsdb_attribute *attribute;
 197         struct dsdb_schema *schema;
 198         enum dsdb_schema_convert_target target;
 199
 200         char *next_line = talloc_strdup(mem_ctx, mappings);
 201
 202         if (!target_str || strcasecmp(target_str, "openldap") == 0) {
 203                 target = TARGET_OPENLDAP;
 204         } else if (strcasecmp(target_str, "fedora-ds") == 0) {
 205                 target = TARGET_FEDORA_DS;
 206         } else {
 207                 talloc_free(mem_ctx);
 208                 DEBUG(0, ("Invalid target type for schema conversion %s\n", target_str));
 209                 return NULL;
 210         }
 211
 212         /* The mappings are line-separated, and specify details such as OIDs to skip etc */
 213         while (1) {
 214                 line = next_line;
 215                 next_line = strchr(line, '\n');
 216                 if (!next_line) {
 217                         break;
 218                 }
 219                 next_line[0] = '\0';
 220                 next_line++;
 221
 222                 /* Blank Line */
 223                 if (line[0] == '\0') {
 224                         continue;
 225                 }
 226                 /* Comment */
 227                 if (line[0] == '#') {
 228                         continue;
 229                 }
 230
 231                 if (isdigit(line[0])) {
 232                         char *p = strchr(line, ':');
 233                         if (!p) {
 234                                 DEBUG(0, ("schema mapping file line has OID but no OID to map to: %s\n", line));
 235                                 return NULL;
 236                         }
 237                         p[0] = '\0';
 238                         p++;
 239                         oid_map = talloc_realloc(mem_ctx, oid_map, struct oid_map, num_oid_maps + 2);
 240                         trim_string(line, " ", " ");
 241                         oid_map[num_oid_maps].old_oid = talloc_strdup(oid_map, line);
 242                         trim_string(p, " ", " ");
 243                         oid_map[num_oid_maps].new_oid = p;
 244                         num_oid_maps++;
 245                         oid_map[num_oid_maps].old_oid = NULL;
 246                 } else {
 247                         char *p = strchr(line, ':');
 248                         if (p) {
 249                                 /* remap attribute/objectClass */
 250                                 p[0] = '\0';
 251                                 p++;
 252                                 attr_map = talloc_realloc(mem_ctx, attr_map, struct attr_map, num_attr_maps + 2);
 253                                 trim_string(line, " ", " ");
 254                                 attr_map[num_attr_maps].old_attr = talloc_strdup(attr_map, line);
 255                                 trim_string(p, " ", " ");
 256                                 attr_map[num_attr_maps].new_attr = p;
 257                                 num_attr_maps++;
 258                                 attr_map[num_attr_maps].old_attr = NULL;
 259                         } else {
 260                                 /* skip attribute/objectClass */
 261                                 attrs_skip = talloc_realloc(mem_ctx, attrs_skip, const char *, num_skip + 2);
 262                                 trim_string(line, " ", " ");
 263                                 attrs_skip[num_skip] = talloc_strdup(attrs_skip, line);
 264                                 num_skip++;
 265                                 attrs_skip[num_skip] = NULL;
 266                         }
 267                 }
 268         }
 269
 270         schema = dsdb_get_schema(ldb, mem_ctx);
 271         if (!schema) {
 272                 talloc_free(mem_ctx);
 273                 DEBUG(0, ("No schema on ldb to convert!\n"));
 274                 return NULL;
 275         }
 276
 277         switch (target) {
 278         case TARGET_OPENLDAP:
 279                 out = talloc_strdup(mem_ctx, "");
 280                 break;
 281         case TARGET_FEDORA_DS:
 282                 out = talloc_strdup(mem_ctx, "dn: cn=schema\n");
 283                 break;
 284         default:
 285                 talloc_free(mem_ctx);
 286                 DEBUG(0,(__location__ " Wrong type of target %u!", (unsigned)target));
 287                 return NULL;
 288         }
 289
 290         for (attribute=schema->attributes; attribute; attribute = attribute->next) {
 291                 const char *name = attribute->lDAPDisplayName;
 292                 const char *oid = attribute->attributeID_oid;
 293                 const char *syntax = attribute->attributeSyntax_oid;
 294                 const char *equality = NULL, *substring = NULL;
 295                 bool single_value = attribute->isSingleValued;
 296
 297                 char *schema_entry = NULL;
 298                 unsigned int j;
 299
 300                 /* We have been asked to skip some attributes/objectClasses */
 301                 if (attrs_skip && str_list_check_ci(attrs_skip, name)) {
 302                         continue;
 303                 }
 304
 305                 /* We might have been asked to remap this oid, due to a conflict */
 306                 for (j=0; oid && oid_map && oid_map[j].old_oid; j++) {
 307                         if (strcasecmp(oid, oid_map[j].old_oid) == 0) {
 308                                 oid =  oid_map[j].new_oid;
 309                                 break;
 310                         }
 311                 }
 312
 313                 if (attribute->syntax) {
 314                         /* We might have been asked to remap this oid,
 315                          * due to a conflict, or lack of
 316                          * implementation */
 317                         syntax = attribute->syntax->ldap_oid;
 318                         /* We might have been asked to remap this oid, due to a conflict */
 319                         for (j=0; syntax && oid_map && oid_map[j].old_oid; j++) {
 320                                 if (strcasecmp(syntax, oid_map[j].old_oid) == 0) {
 321                                         syntax =  oid_map[j].new_oid;
 322                                         break;
 323                                 }
 324                         }
 325
 326                         equality = attribute->syntax->equality;
 327                         substring = attribute->syntax->substring;
 328                 }
 329
 330                 /* We might have been asked to remap this name, due to a conflict */
 331                 for (j=0; name && attr_map && attr_map[j].old_attr; j++) {
 332                         if (strcasecmp(name, attr_map[j].old_attr) == 0) {
 333                                 name =  attr_map[j].new_attr;
 334                                 break;
 335                         }
 336                 }
 337
 338                 schema_entry = schema_attribute_description(mem_ctx,
 339                                                             target,
 340                                                             SEPERATOR,
 341                                                             oid,
 342                                                             name,
 343                                                             equality,
 344                                                             substring,
 345                                                             syntax,
 346                                                             single_value,
 347                                                             false,
 348                                                             NULL, NULL,
 349                                                             NULL, NULL,
 350                                                             false, false);
 351
 352                 if (schema_entry == NULL) {
 353                         talloc_free(mem_ctx);
 354                         DEBUG(0, ("failed to generate attribute description for %s\n", name));
 355                         return NULL;
 356                 }
 357
 358                 switch (target) {
 359                 case TARGET_OPENLDAP:
 360                         out = talloc_asprintf_append(out, "attributetype %s\n\n", schema_entry);
 361                         break;
 362                 case TARGET_FEDORA_DS:
 363                         out = talloc_asprintf_append(out, "attributeTypes: %s\n", schema_entry);
 364                         break;
 365                 default:
 366                         talloc_free(mem_ctx);
 367                         DEBUG(0,(__location__ " Wrong type of target %u!", (unsigned)target));
 368                         return NULL;
 369                 }
 370         }
 371
 372         out = print_schema_recursive(out, schema, "top", target, attrs_skip, attr_map, oid_map);
 373
 374         talloc_steal(ldb, out);
 375         talloc_free(mem_ctx);
 376
 377         return out;
 378 }
 379