in reply to Perl::LDAP Bind to Active Directory

I don't want to install OpenSSL or anything else that's not part of "standard Windows".

Are you sure? Perl isn't part of "standard Windows" either.

http://cpansearch.perl.org/src/GBARR/perl-ldap-0.39/Makefile.PL 

    #recommends('Digest::MD5'),        # for DIGEST-MD5 SASL mech
    #recommends('Digest::HMAC_MD5'),    # for CRAM-MD5 SASL mech
    #recommends('GSSAPI'),        # for GSSAPI SASL mech

[download]
http://search.cpan.org/~agrolms/GSSAPI-0.26/

In Section Seekers of Perl Wisdom