Lightweight Directory Access Protocol PDUs in TypeScript

ASN.1 data structures and PDUs based on the ASN.1 definitions in IETF RFC 4511, which defines the Lightweight Directory Access Protocol (LDAP).

See the documentation that applies to this library and others to learn how to use this module.

Includes functions for implementing the LDAP syntaxes defined in IETF RFC 4517, functions for evaluating LDAP filters, and functions for converting LDAP data structures to strings for transfer over the wire.

Example

import { BERElement } from "@wildboar/asn1";
import { _decode_LDAPMessage } from "@wildboar/ldap";

// Handle a request received over TCP.
const el = new BERElement();;
el.fromBytes(requestBytes); // Throws if a full LDAPMessage is not received yet.
// The above returns the number of bytes read.
const request = _decode_LDAPMessage(el);
if (request.protocolOp === "bindRequest") {
  const bindRequest = request.protocolOp.bindRequest;
  const namestr = Buffer.from(bindRequest.name).toString("utf8");
  console.log(`Binding as ${namestr}`);
}

ASN.1 Compiler

These libraries were generated entirely or in part by the ASN.1 Compilation Service offered by Wildboar Software. The ASN.1 compiler itself is closed-source and proprietary, but some of the libraries produced with it are released publicly under the MIT license.

If you would like to see additional ASN.1 libraries in TypeScript or other programming languages, or if you have any other questions, please contact us at contact@wildboarsoftware.com.

ESM-Only

As of June 12th, 2025, this module is only compiled to ESM. CommonJS will no longer be supported.