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capstone-auth

v2.2.6

Published

A simple async nodejs library for LDAP user authentication

Downloads

17

Readme

A Simple node Library that Authenticates a User Against an LDAP/AD Server forked from https://github.com/shaozi/ldap-authentication

Goal

Make authentication with an LDAP server easy customized to CapstoneJS

Description

This library use ldapjs as the underneath library. It has two modes of authentications:

  1. Admin authenticate mode. If an admin user is provided, the library will login (ldap bind) with the admin user, then search for the user to be authenticated, get its DN (distinguish name), then use the user DN and password to login again. If every thing is ok, the user details will be returned.

  2. Self authenticate mode. If the admin user is not provided, then the userDn and userPassword must be provided. If any of userSearchBase or usernameAttribute is missing, then the lib simply does a login with the userDn and userPassword (ldap bind), and returns true if succeeds.

    Otherwise, the lib does a login with the userDn and userPassword (ldap bind), then does a search on the user and return the user's details.

Features

  • Can use an admin to search and authenticate a user
  • Can also use a regular user and authenticate the user itself
  • Supports ldap, ldaps, and STARTTLS
  • Async/Await Promise

Usage

Installation

npm install capstone-auth --save

Examples

User authenticate without getting user details

let authenticated = await authenticate({
  ldapOpts: { url: 'ldap://ldap.forumsys.com' },
  userDn: 'uid=gauss,dc=example,dc=com',
  userPassword: 'password',
})

User authenticate and return user details

let authenticated = await authenticate({
  ldapOpts: { url: 'ldap://ldap.forumsys.com' },
  userDn: 'uid=gauss,dc=example,dc=com',
  userPassword: 'password',
  userSearchBase: 'dc=example,dc=com',
  usernameAttribute: 'uid',
  username: 'gauss',
})

User authenticate and return user details with groups

let authenticated = await authenticate({
  ldapOpts: { url: 'ldap://ldap.forumsys.com' },
  userDn: 'uid=gauss,dc=example,dc=com',
  userPassword: 'password',
  userSearchBase: 'dc=example,dc=com',
  usernameAttribute: 'uid',
  username: 'gauss',
  groupsSearchBase: 'dc=example,dc=com',
  groupClass: 'groupOfUniqueNames',
  groupMemberAttribute: 'uniqueMember',
})

Complete example

const { authenticate } = require('capstone-auth')

async function auth() {
  // auth with admin
  let options = {
    ldapOpts: {
      url: 'ldap://ldap.forumsys.com',
      // tlsOptions: { rejectUnauthorized: false }
    },
    adminDn: 'cn=read-only-admin,dc=example,dc=com',
    adminPassword: 'password',
    userPassword: 'password',
    userSearchBase: 'dc=example,dc=com',
    usernameAttribute: 'uid',
    username: 'gauss',
    // starttls: false
  }

  let user = await authenticate(options)
  console.log(user)

  // auth with regular user
  options = {
    ldapOpts: {
      url: 'ldap://ldap.forumsys.com',
      // tlsOptions: { rejectUnauthorized: false }
    },
    userDn: 'uid=einstein,dc=example,dc=com',
    userPassword: 'password',
    userSearchBase: 'dc=example,dc=com',
    usernameAttribute: 'uid',
    username: 'einstein',
    // starttls: false
  }

  user = await authenticate(options)
  console.log(user)
}

auth()

Parameters

  • ldapOpts: This is passed to ldapjs client directly
    • url: url of the ldap server. Example: ldap://ldap.forumsys.com
    • tlsOptions: options to pass to node tls. Example: { rejectUnauthorized: false }
    • connectTimeout: Int. Default: 5000. Connect timeout in ms
  • adminDn: The DN of the admistrator. Example: cn=read-only-admin,dc=example,dc=com,
  • adminPassword: The password of the admin.
  • userDn: The DN of the user to be authenticated. This is only needed if adminDn and adminPassword are not provided. Example: uid=gauss,dc=example,dc=com
  • userPassword: The password of the user,
  • userSearchBase: The ldap base DN to search the user. Example: dc=example,dc=com
  • usernameAttribute: The ldap search equality attribute name corresponding to the user's username. It will be used with the value in username to construct an ldap filter as ({attribute}={username}) to find the user and get user details in LDAP. In self authenticate mode (userDn and userPassword are provided, but not adminDn and adminPassword), if this value is not set, then authenticate will return true right after user bind succeed. No user details from LDAP search will be performed and returned. Example: uid
  • username: The username to authenticate with. It is used together with the name in usernameAttribute to construct an ldap filter as ({attribute}={username}) to find the user and get user details in LDAP. Example: some user input
  • starttls: Boolean. Use STARTTLS or not
  • groupsSearchBase: if specified with groupClass, will serve as search base for authenticated user groups
  • groupClass: if specified with groupsSearchBase, will be used as objectClass in search filter for authenticated user groups
  • groupMemberAttribute: if specified with groupClass and groupsSearchBase, will be used as member name (if not specified this defaults to member) in search filter for authenticated user groups