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 #undef strcasecmp
  27
  28 #define SEPARATOR "\n  "
  29
  30 struct attr_map {
  31         char *old_attr;
  32         char *new_attr;
  33 };
  34
  35 struct oid_map {
  36         char *old_oid;
  37         char *new_oid;
  38 };
  39
  40 static char *print_schema_recursive(char *append_to_string, struct dsdb_schema *schema, const char *print_class,
  41                                     enum dsdb_schema_convert_target target,
  42                                     const char **attrs_skip, const struct attr_map *attr_map, const struct oid_map *oid_map)
  43 {
  44         char *out = append_to_string;
  45         const struct dsdb_class *objectclass;
  46         objectclass = dsdb_class_by_lDAPDisplayName(schema, print_class);
  47         if (!objectclass) {
  48                 DEBUG(0, ("Cannot find class %s in schema\n", print_class));
  49                 return NULL;
  50         }
  51
  52         /* We have been asked to skip some attributes/objectClasses */
  53         if (attrs_skip == NULL || !str_list_check_ci(attrs_skip, objectclass->lDAPDisplayName)) {
  54                 TALLOC_CTX *mem_ctx = talloc_new(append_to_string);
  55                 const char *name = objectclass->lDAPDisplayName;
  56                 const char *oid = objectclass->governsID_oid;
  57                 const char *subClassOf = objectclass->subClassOf;
  58                 int objectClassCategory = objectclass->objectClassCategory;
  59                 const char **must;
  60                 const char **may;
  61                 char *schema_entry = NULL;
  62                 struct ldb_val objectclass_name_as_ldb_val = data_blob_string_const(objectclass->lDAPDisplayName);
  63                 struct ldb_message_element objectclass_name_as_el = {
  64                         .name = "objectClass",
  65                         .num_values = 1,
  66                         .values = &objectclass_name_as_ldb_val
  67                 };
  68                 unsigned int j;
  69                 unsigned int attr_idx;
  70
  71                 if (!mem_ctx) {
  72                         DEBUG(0, ("Failed to create new talloc context\n"));
  73                         return NULL;
  74                 }
  75
  76                 /* We might have been asked to remap this oid, due to a conflict */
  77                 for (j=0; oid_map && oid_map[j].old_oid; j++) {
  78                         if (strcasecmp(oid, oid_map[j].old_oid) == 0) {
  79                                 oid =  oid_map[j].new_oid;
  80                                 break;
  81                         }
  82                 }
  83
  84                 /* We might have been asked to remap this name, due to a conflict */
  85                 for (j=0; name && attr_map && attr_map[j].old_attr; j++) {
  86                         if (strcasecmp(name, attr_map[j].old_attr) == 0) {
  87                                 name =  attr_map[j].new_attr;
  88                                 break;
  89                         }
  90                 }
  91
  92                 /* We might have been asked to remap this subClassOf, due to a conflict */
  93                 for (j=0; subClassOf && attr_map && attr_map[j].old_attr; j++) {
  94                         if (strcasecmp(subClassOf, attr_map[j].old_attr) == 0) {
  95                                 subClassOf =  attr_map[j].new_attr;
  96                                 break;
  97                         }
  98                 }
  99
 100                 may = dsdb_full_attribute_list(mem_ctx, schema, &objectclass_name_as_el, DSDB_SCHEMA_ALL_MAY);
 101
 102                 for (j=0; may && may[j]; j++) {
 103                         /* We might have been asked to remap this name, due to a conflict */
 104                         for (attr_idx=0; attr_map && attr_map[attr_idx].old_attr; attr_idx++) {
 105                                 if (strcasecmp(may[j], attr_map[attr_idx].old_attr) == 0) {
 106                                         may[j] =  attr_map[attr_idx].new_attr;
 107                                         break;
 108                                 }
 109                         }
 110                 }
 111
 112                 must = dsdb_full_attribute_list(mem_ctx, schema, &objectclass_name_as_el, DSDB_SCHEMA_ALL_MUST);
 113
 114                 for (j=0; must && must[j]; j++) {
 115                         /* We might have been asked to remap this name, due to a conflict */
 116                         for (attr_idx=0; attr_map && attr_map[attr_idx].old_attr; attr_idx++) {
 117                                 if (strcasecmp(must[j], attr_map[attr_idx].old_attr) == 0) {
 118                                         must[j] =  attr_map[attr_idx].new_attr;
 119                                         break;
 120                                 }
 121                         }
 122                 }
 123
 124                 schema_entry = schema_class_description(mem_ctx, target,
 125                                                         SEPARATOR,
 126                                                         oid,
 127                                                         name,
 128                                                         NULL,
 129                                                         subClassOf,
 130                                                         objectClassCategory,
 131                                                         must,
 132                                                         may,
 133                                                         NULL);
 134                 if (schema_entry == NULL) {
 135                         talloc_free(mem_ctx);
 136                         DEBUG(0, ("failed to generate schema description for %s\n", name));
 137                         return NULL;
 138                 }
 139
 140                 switch (target) {
 141                 case TARGET_OPENLDAP:
 142                         out = talloc_asprintf_append(out, "objectclass %s\n\n", schema_entry);
 143                         break;
 144                 case TARGET_FEDORA_DS:
 145                         out = talloc_asprintf_append(out, "objectClasses: %s\n", schema_entry);
 146                         break;
 147                 default:
 148                         talloc_free(mem_ctx);
 149                         DEBUG(0,(__location__ " Wrong type of target %u!\n", (unsigned)target));
 150                         return NULL;
 151                 }
 152                 talloc_free(mem_ctx);
 153         }
 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                 talloc_free(mem_ctx);
 206                 DEBUG(0, ("Invalid target type for schema conversion %s\n", target_str));
 207                 return NULL;
 208         }
 209
 210         /* The mappings are line-separated, and specify details such as OIDs to skip etc */
 211         while (1) {
 212                 line = next_line;
 213                 next_line = strchr(line, '\n');
 214                 if (!next_line) {
 215                         break;
 216                 }
 217                 next_line[0] = '\0';
 218                 next_line++;
 219
 220                 /* Blank Line */
 221                 if (line[0] == '\0') {
 222                         continue;
 223                 }
 224                 /* Comment */
 225                 if (line[0] == '#') {
 226                         continue;
 227                 }
 228
 229                 if (isdigit(line[0])) {
 230                         char *p = strchr(line, ':');
 231                         if (!p) {
 232                                 DEBUG(0, ("schema mapping file line has OID but no OID to map to: %s\n", line));
 233                                 return NULL;
 234                         }
 235                         p[0] = '\0';
 236                         p++;
 237                         oid_map = talloc_realloc(mem_ctx, oid_map, struct oid_map, num_oid_maps + 2);
 238                         trim_string(line, " ", " ");
 239                         oid_map[num_oid_maps].old_oid = talloc_strdup(oid_map, line);
 240                         trim_string(p, " ", " ");
 241                         oid_map[num_oid_maps].new_oid = p;
 242                         num_oid_maps++;
 243                         oid_map[num_oid_maps].old_oid = NULL;
 244                 } else {
 245                         char *p = strchr(line, ':');
 246                         if (p) {
 247                                 /* remap attribute/objectClass */
 248                                 p[0] = '\0';
 249                                 p++;
 250                                 attr_map = talloc_realloc(mem_ctx, attr_map, struct attr_map, num_attr_maps + 2);
 251                                 trim_string(line, " ", " ");
 252                                 attr_map[num_attr_maps].old_attr = talloc_strdup(attr_map, line);
 253                                 trim_string(p, " ", " ");
 254                                 attr_map[num_attr_maps].new_attr = p;
 255                                 num_attr_maps++;
 256                                 attr_map[num_attr_maps].old_attr = NULL;
 257                         } else {
 258                                 /* skip attribute/objectClass */
 259                                 attrs_skip = talloc_realloc(mem_ctx, attrs_skip, const char *, num_skip + 2);
 260                                 trim_string(line, " ", " ");
 261                                 attrs_skip[num_skip] = talloc_strdup(attrs_skip, line);
 262                                 num_skip++;
 263                                 attrs_skip[num_skip] = NULL;
 264                         }
 265                 }
 266         }
 267
 268         schema = dsdb_get_schema(ldb, mem_ctx);
 269         if (!schema) {
 270                 talloc_free(mem_ctx);
 271                 DEBUG(0, ("No schema on ldb to convert!\n"));
 272                 return NULL;
 273         }
 274
 275         switch (target) {
 276         case TARGET_OPENLDAP:
 277                 out = talloc_strdup(mem_ctx, "");
 278                 break;
 279         case TARGET_FEDORA_DS:
 280                 out = talloc_strdup(mem_ctx, "dn: cn=schema\n");
 281                 break;
 282         default:
 283                 talloc_free(mem_ctx);
 284                 DEBUG(0,(__location__ " Wrong type of target %u!\n", (unsigned)target));
 285                 return NULL;
 286         }
 287
 288         for (attribute=schema->attributes; attribute; attribute = attribute->next) {
 289                 const char *name = attribute->lDAPDisplayName;
 290                 const char *oid = attribute->attributeID_oid;
 291                 const char *syntax = attribute->attributeSyntax_oid;
 292                 const char *equality = NULL, *substring = NULL;
 293                 bool single_value = attribute->isSingleValued;
 294
 295                 char *schema_entry = NULL;
 296                 unsigned int j;
 297
 298                 /* We have been asked to skip some attributes/objectClasses */
 299                 if (attrs_skip && str_list_check_ci(attrs_skip, name)) {
 300                         continue;
 301                 }
 302
 303                 /* We might have been asked to remap this oid, due to a conflict */
 304                 for (j=0; oid && oid_map && oid_map[j].old_oid; j++) {
 305                         if (strcasecmp(oid, oid_map[j].old_oid) == 0) {
 306                                 oid =  oid_map[j].new_oid;
 307                                 break;
 308                         }
 309                 }
 310
 311                 if (attribute->syntax) {
 312                         /* We might have been asked to remap this oid,
 313                          * due to a conflict, or lack of
 314                          * implementation */
 315                         syntax = attribute->syntax->ldap_oid;
 316                         /* We might have been asked to remap this oid, due to a conflict */
 317                         for (j=0; syntax && oid_map && oid_map[j].old_oid; j++) {
 318                                 if (strcasecmp(syntax, oid_map[j].old_oid) == 0) {
 319                                         syntax =  oid_map[j].new_oid;
 320                                         break;
 321                                 }
 322                         }
 323
 324                         equality = attribute->syntax->equality;
 325                         substring = attribute->syntax->substring;
 326                 }
 327
 328                 /* We might have been asked to remap this name, due to a conflict */
 329                 for (j=0; name && attr_map && attr_map[j].old_attr; j++) {
 330                         if (strcasecmp(name, attr_map[j].old_attr) == 0) {
 331                                 name =  attr_map[j].new_attr;
 332                                 break;
 333                         }
 334                 }
 335
 336                 schema_entry = schema_attribute_description(mem_ctx,
 337                                                             target,
 338                                                             SEPARATOR,
 339                                                             oid,
 340                                                             name,
 341                                                             equality,
 342                                                             substring,
 343                                                             syntax,
 344                                                             single_value,
 345                                                             false,
 346                                                             NULL, NULL,
 347                                                             NULL, NULL,
 348                                                             false, false);
 349
 350                 if (schema_entry == NULL) {
 351                         talloc_free(mem_ctx);
 352                         DEBUG(0, ("failed to generate attribute description for %s\n", name));
 353                         return NULL;
 354                 }
 355
 356                 switch (target) {
 357                 case TARGET_OPENLDAP:
 358                         out = talloc_asprintf_append(out, "attributetype %s\n\n", schema_entry);
 359                         break;
 360                 case TARGET_FEDORA_DS:
 361                         out = talloc_asprintf_append(out, "attributeTypes: %s\n", schema_entry);
 362                         break;
 363                 default:
 364                         talloc_free(mem_ctx);
 365                         DEBUG(0,(__location__ " Wrong type of target %u!\n", (unsigned)target));
 366                         return NULL;
 367                 }
 368         }
 369
 370         out = print_schema_recursive(out, schema, "top", target, attrs_skip, attr_map, oid_map);
 371
 372         talloc_steal(ldb, out);
 373         talloc_free(mem_ctx);
 374
 375         return out;
 376 }
 377