How to authenticate User Credentials against AD from Android Java

I have a User Login, which I need to authenticate using the Active Directory. Is there a way to do this?

I'm using Android/Java. I am in the same Network as the Domain Controller.

• I have the User's DN and Password.
• I also have the Domain Controller Address.

You can use the UnboundID LDAP SDK.

UnboundID: "UnboundID Website"

This would then allow you to authenticate the Credentials against the Domain Controller.

private static final String DC_ADDRESS = "xx.xxx.xxx.xxx";

public static Boolean authenticate(String bindDN, String password) {
    String searchFilter = "(sAMAccountName=" + username +")";

    final SSLUtil sslUtil = new SSLUtil(new TrustAllTrustManager());

    try {
        SSLSocketFactory sslSocketFactory = sslUtil.createSSLSocketFactory();
        JavaToLDAPSocketFactory ldapSocketFactory =
                new JavaToLDAPSocketFactory(sslSocketFactory);
        LDAPConnection c = new LDAPConnection(ldapSocketFactory, DC_ADDRESS, 636);

        BindResult bindResult = c.bind(bindDM, password);

        if (c.isConnected()) {
            c.close();
        }

        if(bindResult.getResultCode() != ResultCode.SUCCESS) {
            Log.w(TAG, "Authentication failed");
            return false;
        }

        return true;
    } catch(LDAPException e) {
        LogUtil.w(TAG, "Authentication failed: " + e.getMessage());
        LogUtil.e(TAG, "StackTrace: " + Arrays.toString(e.getStackTrace()));
        return e.toLDAPResult().getResultCode();
    } catch(Exception e) {
        LogUtil.e(TAG, "Exception caught while authenticating: " + e.getMessage());
        LogUtil.e(TAG, "StackTrace: " + Arrays.toString(e.getStackTrace()));
    }
    return false;
}