Need help on NTLM signing over LDAP authentication

Question

I need to do NTLM authentication over LDAP protocol. For this I am trying to use Unbound ID LDAP SDK and jcifs-ng together. Everything works fine if domain controllers doesn't require LDAP signing (integrity check). If LDAP signing is enabled, code fails with message

The server requires binds to turn on integrity checking if SSL\TLS are not already active on the connection

If I use NtlmFlags.NTLMSSP_NEGOTIATE_SIGN flag for Type3Message, code fails with following message ( even if LDAP Signing is disabled in domain controller )

resultCode :: 49 (invalid credentials) resultCode :: 80090302: LdapErr: DSID-0C090588, comment: AcceptSecurityContext error, data 1, v2580

Please point me to any other way or the mistake in my approach to construct Type3Message properly. Thanks in advance.

Answer 1

NTLM signing was achieved using apache httpclient library instead of using jcifs-ng