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-rw-r--r--source4/dsdb/schema/schema_syntax.c140
1 files changed, 139 insertions, 1 deletions
diff --git a/source4/dsdb/schema/schema_syntax.c b/source4/dsdb/schema/schema_syntax.c
index a5d92260dd..4fdc63ef7b 100644
--- a/source4/dsdb/schema/schema_syntax.c
+++ b/source4/dsdb/schema/schema_syntax.c
@@ -1626,7 +1626,145 @@ static WERROR dsdb_syntax_DN_ldb_to_drsuapi(struct ldb_context *ldb,
return WERR_OK;
}
+static WERROR dsdb_syntax_DN_validate_one_val(struct ldb_context *ldb,
+ const struct dsdb_schema *schema,
+ const struct dsdb_attribute *attr,
+ const struct ldb_val *val,
+ TALLOC_CTX *mem_ctx,
+ struct dsdb_dn **_dsdb_dn)
+{
+ static const char * const extended_list[] = { "GUID", "SID", NULL };
+ enum ndr_err_code ndr_err;
+ struct GUID guid;
+ struct dom_sid sid;
+ const DATA_BLOB *sid_blob;
+ struct dsdb_dn *dsdb_dn;
+ struct ldb_dn *dn;
+ char *dn_str;
+ struct ldb_dn *dn2;
+ char *dn2_str;
+ int num_components;
+ TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
+ NTSTATUS status;
+
+ W_ERROR_HAVE_NO_MEMORY(tmp_ctx);
+
+ if (attr->attributeID_id == 0xFFFFFFFF) {
+ return WERR_FOOBAR;
+ }
+
+ dsdb_dn = dsdb_dn_parse(tmp_ctx, ldb, val,
+ attr->syntax->ldap_oid);
+ if (!dsdb_dn) {
+ talloc_free(tmp_ctx);
+ return WERR_DS_INVALID_ATTRIBUTE_SYNTAX;
+ }
+ dn = dsdb_dn->dn;
+
+ dn2 = ldb_dn_copy(tmp_ctx, dn);
+ if (dn == NULL) {
+ talloc_free(tmp_ctx);
+ return WERR_NOMEM;
+ }
+ num_components = ldb_dn_get_comp_num(dn);
+
+ status = dsdb_get_extended_dn_guid(dn, &guid, "GUID");
+ if (NT_STATUS_EQUAL(status, NT_STATUS_OBJECT_NAME_NOT_FOUND)) {
+ num_components++;
+ } else if (!NT_STATUS_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return WERR_DS_INVALID_ATTRIBUTE_SYNTAX;
+ }
+
+ sid_blob = ldb_dn_get_extended_component(dn, "SID");
+ if (sid_blob) {
+ num_components++;
+ ndr_err = ndr_pull_struct_blob_all(sid_blob,
+ tmp_ctx,
+ schema->iconv_convenience,
+ &sid,
+ (ndr_pull_flags_fn_t)ndr_pull_dom_sid);
+ if (!NDR_ERR_CODE_IS_SUCCESS(ndr_err)) {
+ talloc_free(tmp_ctx);
+ return WERR_DS_INVALID_ATTRIBUTE_SYNTAX;
+ }
+ }
+
+ /* Do not allow links to the RootDSE */
+ if (num_components == 0) {
+ talloc_free(tmp_ctx);
+ return WERR_DS_INVALID_ATTRIBUTE_SYNTAX;
+ }
+
+ /*
+ * We need to check that only "GUID" and "SID" are
+ * specified as extended components, we do that
+ * by comparing the dn's after removing all components
+ * from one dn and only the allowed subset from the other
+ * one.
+ */
+ ldb_dn_extended_filter(dn, extended_list);
+ ldb_dn_remove_extended_components(dn2);
+
+ dn_str = ldb_dn_get_extended_linearized(tmp_ctx, dn, 0);
+ if (dn_str == NULL) {
+ talloc_free(tmp_ctx);
+ return WERR_DS_INVALID_ATTRIBUTE_SYNTAX;
+ }
+ dn2_str = ldb_dn_get_extended_linearized(tmp_ctx, dn2, 0);
+ if (dn2_str == NULL) {
+ talloc_free(tmp_ctx);
+ return WERR_DS_INVALID_ATTRIBUTE_SYNTAX;
+ }
+
+ if (strcmp(dn_str, dn2_str) != 0) {
+ talloc_free(tmp_ctx);
+ return WERR_DS_INVALID_ATTRIBUTE_SYNTAX;
+ }
+
+ *_dsdb_dn = talloc_move(mem_ctx, &dsdb_dn);
+ talloc_free(tmp_ctx);
+ return WERR_OK;
+}
+
+static WERROR dsdb_syntax_DN_validate_ldb(struct ldb_context *ldb,
+ const struct dsdb_schema *schema,
+ const struct dsdb_attribute *attr,
+ const struct ldb_message_element *in)
+{
+ uint32_t i;
+
+ if (attr->attributeID_id == 0xFFFFFFFF) {
+ return WERR_FOOBAR;
+ }
+
+ for (i=0; i < in->num_values; i++) {
+ WERROR status;
+ struct dsdb_dn *dsdb_dn;
+ TALLOC_CTX *tmp_ctx = talloc_new(ldb);
+ W_ERROR_HAVE_NO_MEMORY(tmp_ctx);
+
+ status = dsdb_syntax_DN_validate_one_val(ldb,
+ schema,
+ attr,
+ &in->values[i],
+ tmp_ctx, &dsdb_dn);
+ if (!W_ERROR_IS_OK(status)) {
+ talloc_free(tmp_ctx);
+ return status;
+ }
+
+ if (dsdb_dn->dn_format != DSDB_NORMAL_DN) {
+ talloc_free(tmp_ctx);
+ return WERR_DS_INVALID_ATTRIBUTE_SYNTAX;
+ }
+
+ talloc_free(tmp_ctx);
+ }
+
+ return WERR_OK;
+}
static WERROR dsdb_syntax_DN_BINARY_drsuapi_to_ldb(struct ldb_context *ldb,
const struct dsdb_schema *schema,
@@ -2131,7 +2269,7 @@ static const struct dsdb_syntax dsdb_syntaxes[] = {
.attributeSyntax_oid = "2.5.5.1",
.drsuapi_to_ldb = dsdb_syntax_DN_drsuapi_to_ldb,
.ldb_to_drsuapi = dsdb_syntax_DN_ldb_to_drsuapi,
- .validate_ldb = dsdb_syntax_ALLOW_validate_ldb,
+ .validate_ldb = dsdb_syntax_DN_validate_ldb,
.equality = "distinguishedNameMatch",
.comment = "Object(DS-DN) == a DN",
},{