hi,

I am coding a perl dancer web app that will fetch/write info to an ldap backend 
(freeipa.org). The ldap vendor is 389, the old netscape ldap server.

This backend includes kerberos.

So without sasl, it works great. But i would like to avoid passwords provided 
we already have a kerberos infrastructure. And I get this error:

substr outside of string at 
/opt/perl5/perls/perl-5.14.2/lib/site_perl/5.14.4/Authen/SASL/Perl.pm line 333.

Dancer very helpfully displays that line for me:

my $x = $self->{conn}->encode(substr($_[1], $offset || 0, $bsz));

but this tells me very little.

This is a slightly modified script that binds to the ldap server. I get an 
ldap/REALM ticket so I know that piece is working:

use strict;
use warnings;

use Net::LDAP;
use Authen::SASL;

my $ldapbase = "cn=users,cn=accounts,dc=ipa,dc=asenjo,dc=nx";

my ( $name ) = @ARGV ;

print $name , "\n";

my $sasl = Authen::SASL->new(mechanism => 'GSSAPI' ) || die "$@";

my $ldap = Net::LDAP->new('kdc.ipa.asenjo.nx') || die "$@";

my $msg = $ldap->bind( sasl => $sasl );

ldap_search($name);

sub ldap_search {
    my ( $search ) = @_;
    $msg = $ldap->search(
                    base    => $ldapbase,
                    scope   => "sub",
                    filter  => "(|(uid=*$search*)(cn=*$search*))",
                    attr    => ["uid"],
                    );

   my %ldap_users;
   for my $entry ( $msg->entries) {
        my $uid = $entry->get_value( 'uid' );
        $ldap_users{$uid} = $uid;
   }
   return %ldap_users;
}

$ ./testkerb test
substr outside of string at 
/opt/perl5/perls/perl-5.14.2/lib/site_perl/5.14.4/Authen/SASL/Perl.pm line 333, 
<DATA> line 635.

Do you have any ideas about how to tackle this?

TIA,

-- 
natxo

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