1 files changed, 69 insertions, 0 deletions
diff --git a/source4/dsdb/common/dsdb_dn.c b/source4/dsdb/common/dsdb_dn.c
index 660eaf7d40..9023b0347a 100644
--- a/source4/dsdb/common/dsdb_dn.c
+++ b/source4/dsdb/common/dsdb_dn.c
@@ -325,3 +325,72 @@ int dsdb_dn_string_comparison(struct ldb_context *ldb, void *mem_ctx,
 {
 	return ldb_any_comparison(ldb, mem_ctx, dsdb_dn_string_canonicalise, v1, v2);
 }
+
+
+/*
+   convert a dsdb_dn to a linked attribute data blob
+*/
+WERROR dsdb_dn_la_to_blob(struct ldb_context *sam_ctx,
+			  const struct dsdb_attribute *schema_attrib,
+			  const struct dsdb_schema *schema,
+			  TALLOC_CTX *mem_ctx,
+			  struct dsdb_dn *dsdb_dn, DATA_BLOB **blob)
+{
+	struct ldb_val v;
+	WERROR werr;
+	struct ldb_message_element val_el;
+	struct drsuapi_DsReplicaAttribute drs;
+
+	/* we need a message_element with just one value in it */
+	v = data_blob_string_const(dsdb_dn_get_extended_linearized(mem_ctx, dsdb_dn, 1));
+
+	val_el.name = schema_attrib->lDAPDisplayName;
+	val_el.values = &v;
+	val_el.num_values = 1;
+
+	werr = schema_attrib->syntax->ldb_to_drsuapi(sam_ctx, schema, schema_attrib, &val_el, mem_ctx, &drs);
+	W_ERROR_NOT_OK_RETURN(werr);
+
+	if (drs.value_ctr.num_values != 1) {
+		DEBUG(1,(__location__ ": Failed to build DRS blob for linked attribute %s\n",
+			 schema_attrib->lDAPDisplayName));
+		return WERR_DS_DRA_INTERNAL_ERROR;
+	}
+
+	*blob = drs.value_ctr.values[0].blob;
+	return WERR_OK;
+}
+
+/*
+  convert a data blob to a dsdb_dn
+ */
+WERROR dsdb_dn_la_from_blob(struct ldb_context *sam_ctx,
+			    const struct dsdb_attribute *schema_attrib,
+			    const struct dsdb_schema *schema,
+			    TALLOC_CTX *mem_ctx,
+			    DATA_BLOB *blob,
+			    struct dsdb_dn **dsdb_dn)
+{
+	WERROR werr;
+	struct ldb_message_element new_el;
+	struct drsuapi_DsReplicaAttribute drs;
+	struct drsuapi_DsAttributeValue val;
+
+	drs.value_ctr.num_values = 1;
+	drs.value_ctr.values = &val;
+	val.blob = blob;
+
+	werr = schema_attrib->syntax->drsuapi_to_ldb(sam_ctx, schema, schema_attrib, &drs, mem_ctx, &new_el);
+	W_ERROR_NOT_OK_RETURN(werr);
+
+	if (new_el.num_values != 1) {
+		return WERR_INTERNAL_ERROR;
+	}
+
+	*dsdb_dn = dsdb_dn_parse(mem_ctx, sam_ctx, &new_el.values[0], schema_attrib->syntax->ldap_oid);
+	if (!*dsdb_dn) {
+		return WERR_INTERNAL_ERROR;
+	}
+
+	return WERR_OK;
+}