s4-ldap: handle VERIFY_NAME control encoding/decoding

source4/libcli/ldap/ldap_controls.c

@@ -426,6 +426,101 @@ static bool decode_asq_control(void *mem_ctx, DATA_BLOB in, void *_out)
 	return true;
 }
 
+static bool decode_verify_name_request(void *mem_ctx, DATA_BLOB in, void *_out)
+{
+	void **out = (void **)_out;
+	DATA_BLOB name;
+	struct asn1_data *data = asn1_init(mem_ctx);
+	struct ldb_verify_name_control *lvnc;
+	int len;
+
+	if (!data) return false;
+
+	if (!asn1_load(data, in)) {
+		return false;
+	}
+
+	lvnc = talloc(mem_ctx, struct ldb_verify_name_control);
+	if (!lvnc) {
+		return false;
+	}
+
+	if (!asn1_start_tag(data, ASN1_SEQUENCE(0))) {
+		return false;
+	}
+
+	if (!asn1_read_Integer(data, &(lvnc->flags))) {
+		return false;
+	}
+
+	if (!asn1_read_OctetString(data, mem_ctx, &name)) {
+		return false;
+	}
+
+	if (name.length) {
+		len = utf16_len_n(name.data, name.length);
+		convert_string_talloc(mem_ctx, CH_UTF16, CH_UNIX,
+					name.data, len,
+					(void **)&lvnc->gc, &lvnc->gc_len);
+
+		if (!(lvnc->gc)) {
+			return false;
+		}
+	} else {
+		lvnc->gc_len = 0;
+		lvnc->gc = NULL;
+	}
+
+	if (!asn1_end_tag(data)) {
+		return false;
+	}
+
+	*out = lvnc;
+	return true;
+}
+
+static bool encode_verify_name_request(void *mem_ctx, void *in, DATA_BLOB *out)
+{
+	struct ldb_verify_name_control *lvnc = talloc_get_type(in, struct ldb_verify_name_control);
+	struct asn1_data *data = asn1_init(mem_ctx);
+	DATA_BLOB gc_utf16;
+
+	if (!data) return false;
+
+	if (!asn1_push_tag(data, ASN1_SEQUENCE(0))) {
+		return false;
+	}
+
+	if (!asn1_write_Integer(data, lvnc->flags)) {
+		return false;
+	}
+
+	if (lvnc->gc_len) {
+		convert_string_talloc(mem_ctx, CH_UNIX, CH_UTF16,
+						lvnc->gc, lvnc->gc_len,
+						(void **)&gc_utf16.data, &gc_utf16.length);
+		if (!asn1_write_OctetString(data, gc_utf16.data, gc_utf16.length)) {
+			return false;
+		}
+	} else {
+		if (!asn1_write_OctetString(data, NULL, 0)) {
+			return false;
+		}
+	}
+
+	if (!asn1_pop_tag(data)) {
+		return false;
+	}
+
+	*out = data_blob_talloc(mem_ctx, data->data, data->length);
+	if (out->data == NULL) {
+		return false;
+	}
+	talloc_free(data);
+
+	return true;
+}
+
 static bool decode_vlv_request(void *mem_ctx, DATA_BLOB in, void *_out)
 {
 	void **out = (void **)_out;
@@ -1158,6 +1253,7 @@ static const struct ldap_control_handler ldap_known_controls[] = {
 	{ LDB_CONTROL_RODC_DCPROMO_OID, decode_flag_request, encode_flag_request },
 	{ LDB_CONTROL_RELAX_OID, decode_flag_request, encode_flag_request },
 	{ DSDB_OPENLDAP_DEREFERENCE_CONTROL, decode_openldap_dereference, encode_openldap_dereference },
+	{ LDB_CONTROL_VERIFY_NAME_OID, decode_verify_name_request, encode_verify_name_request },
 
 	/* the following are internal only, with a network
 	   representation */