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                 const char *objectclass_name_as_list[] = {
  60                         objectclass->lDAPDisplayName,
  61                         NULL
  62                 };
  63                 int j;
  64                 int attr_idx;
  65
  66                 if (!mem_ctx) {
  67                         DEBUG(0, ("Failed to create new talloc context\n"));
  68                         return NULL;
  69                 }
  70
  71                 /* We have been asked to skip some attributes/objectClasses */
  72                 if (attrs_skip && str_list_check_ci(attrs_skip, name)) {
  73                         continue;
  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                 may = dsdb_full_attribute_list(mem_ctx, schema, objectclass_name_as_list, DSDB_SCHEMA_ALL_MAY);
  93
  94                 for (j=0; may && may[j]; j++) {
  95                         /* We might have been asked to remap this name, due to a conflict */
  96                         for (attr_idx=0; attr_map && attr_map[attr_idx].old_attr; attr_idx++) {
  97                                 if (strcasecmp(may[j], attr_map[attr_idx].old_attr) == 0) {
  98                                         may[j] =  attr_map[attr_idx].new_attr;
  99                                         break;
 100                                 }
 101                         }
 102                 }
 103
 104                 must = dsdb_full_attribute_list(mem_ctx, schema, objectclass_name_as_list, DSDB_SCHEMA_ALL_MUST);
 105
 106                 for (j=0; must && must[j]; j++) {
 107                         /* We might have been asked to remap this name, due to a conflict */
 108                         for (attr_idx=0; attr_map && attr_map[attr_idx].old_attr; attr_idx++) {
 109                                 if (strcasecmp(must[j], attr_map[attr_idx].old_attr) == 0) {
 110                                         must[j] =  attr_map[attr_idx].new_attr;
 111                                         break;
 112                                 }
 113                         }
 114                 }
 115
 116                 schema_entry = schema_class_description(mem_ctx, target,
 117                                                         SEPERATOR,
 118                                                         oid,
 119                                                         name,
 120                                                         NULL,
 121                                                         subClassOf,
 122                                                         objectClassCategory,
 123                                                         must,
 124                                                         may,
 125                                                         NULL);
 126                 if (schema_entry == NULL) {
 127                         DEBUG(0, ("failed to generate schema description for %s\n", name));
 128                         return NULL;
 129                 }
 130
 131                 switch (target) {
 132                 case TARGET_OPENLDAP:
 133                         out = talloc_asprintf_append(out, "objectclass %s\n\n", schema_entry);
 134                         break;
 135                 case TARGET_FEDORA_DS:
 136                         out = talloc_asprintf_append(out, "objectClasses: %s\n", schema_entry);
 137                         break;
 138                 }
 139                 talloc_free(mem_ctx);
 140         } while (0);
 141
 142
 143         for (objectclass=schema->classes; objectclass; objectclass = objectclass->next) {
 144                 if (ldb_attr_cmp(objectclass->subClassOf, print_class) == 0
 145                     && ldb_attr_cmp(objectclass->lDAPDisplayName, print_class) != 0) {
 146                         out = print_schema_recursive(out, schema, objectclass->lDAPDisplayName,
 147                                                      target, attrs_skip, attr_map, oid_map);
 148                 }
 149         }
 150         return out;
 151 }
 152
 153 /* Routine to linearise our internal schema into the format that
 154    OpenLDAP and Fedora DS use for their backend.
 155
 156    The 'mappings' are of a format like:
 157
 158 #Standard OpenLDAP attributes
 159 labeledURI
 160 #The memberOf plugin provides this attribute
 161 memberOf
 162 #These conflict with OpenLDAP builtins
 163 attributeTypes:samba4AttributeTypes
 164 2.5.21.5:1.3.6.1.4.1.7165.4.255.7
 165
 166 */
 167
 168
 169 char *dsdb_convert_schema_to_openldap(struct ldb_context *ldb, char *target_str, const char *mappings)
 170 {
 171         /* Read list of attributes to skip, OIDs to map */
 172         TALLOC_CTX *mem_ctx = talloc_new(ldb);
 173         char *line;
 174         char *out;
 175         const char **attrs_skip = NULL;
 176         int num_skip = 0;
 177         struct oid_map *oid_map = NULL;
 178         int num_oid_maps = 0;
 179         struct attr_map *attr_map = NULL;
 180         int num_attr_maps = 0;
 181         struct dsdb_attribute *attribute;
 182         struct dsdb_schema *schema;
 183         enum dsdb_schema_convert_target target;
 184
 185         char *next_line = talloc_strdup(mem_ctx, mappings);
 186
 187         if (!target_str || strcasecmp(target_str, "openldap") == 0) {
 188                 target = TARGET_OPENLDAP;
 189         } else if (strcasecmp(target_str, "fedora-ds") == 0) {
 190                 target = TARGET_FEDORA_DS;
 191         } else {
 192                 DEBUG(0, ("Invalid target type for schema conversion %s\n", target_str));
 193                 return NULL;
 194         }
 195
 196         /* The mappings are line-seperated, and specify details such as OIDs to skip etc */
 197         while (1) {
 198                 line = next_line;
 199                 next_line = strchr(line, '\n');
 200                 if (!next_line) {
 201                         break;
 202                 }
 203                 next_line[0] = '\0';
 204                 next_line++;
 205
 206                 /* Blank Line */
 207                 if (line[0] == '\0') {
 208                         continue;
 209                 }
 210                 /* Comment */
 211                 if (line[0] == '#') {
 212                         continue;
 213                 }
 214
 215                 if (isdigit(line[0])) {
 216                         char *p = strchr(line, ':');
 217                         if (!p) {
 218                                 DEBUG(0, ("schema mapping file line has OID but no OID to map to: %s\n", line));
 219                                 return NULL;
 220                         }
 221                         p[0] = '\0';
 222                         p++;
 223                         oid_map = talloc_realloc(mem_ctx, oid_map, struct oid_map, num_oid_maps + 2);
 224                         trim_string(line, " ", " ");
 225                         oid_map[num_oid_maps].old_oid = talloc_strdup(oid_map, line);
 226                         trim_string(p, " ", " ");
 227                         oid_map[num_oid_maps].new_oid = p;
 228                         num_oid_maps++;
 229                         oid_map[num_oid_maps].old_oid = NULL;
 230                 } else {
 231                         char *p = strchr(line, ':');
 232                         if (p) {
 233                                 /* remap attribute/objectClass */
 234                                 p[0] = '\0';
 235                                 p++;
 236                                 attr_map = talloc_realloc(mem_ctx, attr_map, struct attr_map, num_attr_maps + 2);
 237                                 trim_string(line, " ", " ");
 238                                 attr_map[num_attr_maps].old_attr = talloc_strdup(attr_map, line);
 239                                 trim_string(p, " ", " ");
 240                                 attr_map[num_attr_maps].new_attr = p;
 241                                 num_attr_maps++;
 242                                 attr_map[num_attr_maps].old_attr = NULL;
 243                         } else {
 244                                 /* skip attribute/objectClass */
 245                                 attrs_skip = talloc_realloc(mem_ctx, attrs_skip, const char *, num_skip + 2);
 246                                 trim_string(line, " ", " ");
 247                                 attrs_skip[num_skip] = talloc_strdup(attrs_skip, line);
 248                                 num_skip++;
 249                                 attrs_skip[num_skip] = NULL;
 250                         }
 251                 }
 252         }
 253
 254         schema = dsdb_get_schema(ldb);
 255         if (!schema) {
 256                 DEBUG(0, ("No schema on ldb to convert!\n"));
 257                 return NULL;
 258         }
 259
 260         switch (target) {
 261         case TARGET_OPENLDAP:
 262                 out = talloc_strdup(mem_ctx, "");
 263                 break;
 264         case TARGET_FEDORA_DS:
 265                 out = talloc_strdup(mem_ctx, "dn: cn=schema\n");
 266                 break;
 267         }
 268
 269         for (attribute=schema->attributes; attribute; attribute = attribute->next) {
 270                 const char *name = attribute->lDAPDisplayName;
 271                 const char *oid = attribute->attributeID_oid;
 272                 const char *syntax = attribute->attributeSyntax_oid;
 273                 const char *equality = NULL, *substring = NULL;
 274                 bool single_value = attribute->isSingleValued;
 275
 276                 char *schema_entry = NULL;
 277                 int j;
 278
 279                 /* We have been asked to skip some attributes/objectClasses */
 280                 if (attrs_skip && str_list_check_ci(attrs_skip, name)) {
 281                         continue;
 282                 }
 283
 284                 /* We might have been asked to remap this oid, due to a conflict */
 285                 for (j=0; oid && oid_map && oid_map[j].old_oid; j++) {
 286                         if (strcasecmp(oid, oid_map[j].old_oid) == 0) {
 287                                 oid =  oid_map[j].new_oid;
 288                                 break;
 289                         }
 290                 }
 291
 292                 if (attribute->syntax) {
 293                         /* We might have been asked to remap this oid,
 294                          * due to a conflict, or lack of
 295                          * implementation */
 296                         syntax = attribute->syntax->ldap_oid;
 297                         /* We might have been asked to remap this oid, due to a conflict */
 298                         for (j=0; syntax && oid_map && oid_map[j].old_oid; j++) {
 299                                 if (strcasecmp(syntax, oid_map[j].old_oid) == 0) {
 300                                         syntax =  oid_map[j].new_oid;
 301                                         break;
 302                                 }
 303                         }
 304
 305                         equality = attribute->syntax->equality;
 306                         substring = attribute->syntax->substring;
 307                 }
 308
 309                 /* We might have been asked to remap this name, due to a conflict */
 310                 for (j=0; name && attr_map && attr_map[j].old_attr; j++) {
 311                         if (strcasecmp(name, attr_map[j].old_attr) == 0) {
 312                                 name =  attr_map[j].new_attr;
 313                                 break;
 314                         }
 315                 }
 316
 317                 schema_entry = schema_attribute_description(mem_ctx,
 318                                                             target,
 319                                                             SEPERATOR,
 320                                                             oid,
 321                                                             name,
 322                                                             equality,
 323                                                             substring,
 324                                                             syntax,
 325                                                             single_value,
 326                                                             false,
 327                                                             NULL, NULL,
 328                                                             NULL, NULL,
 329                                                             false, false);
 330
 331                 if (schema_entry == NULL) {
 332                         DEBUG(0, ("failed to generate attribute description for %s\n", name));
 333                         return NULL;
 334                 }
 335
 336                 switch (target) {
 337                 case TARGET_OPENLDAP:
 338                         out = talloc_asprintf_append(out, "attributetype %s\n\n", schema_entry);
 339                         break;
 340                 case TARGET_FEDORA_DS:
 341                         out = talloc_asprintf_append(out, "attributeTypes: %s\n", schema_entry);
 342                         break;
 343                 }
 344         }
 345
 346         out = print_schema_recursive(out, schema, "top", target, attrs_skip, attr_map, oid_map);
 347
 348         return out;
 349 }
 350