Item7395: Cannot login using TWiki::Users::LdapPasswdUser and {Ldap}{Precache} = 0

I think that all data from LDAP db are prefetched in TWiki cache

Unfortunately seems that this strategy does not correctly handle MISS elements in TWiki cache

Looking inside LdapContrib code i found that function getDnOfLogin could return no dn string if $loginName is not in TWiki cache

lib/TWiki/Contrib/LdapContrib.pm

sub getDnOfLogin {
    my ($this, $loginName, $data) = @_;

    return unless $loginName;
    $loginName = lc( $loginName ) unless $this->{caseSensitiveLogin};

    $data ||= $this->{data};

    return TWiki::Sandbox::untaintUnchecked($data->{"U2DN::$loginName"});
}

To solve this problem i had modified getDnOfLogin to solve MISS in TWiki cache

sub getDnOfLogin {
    my ($this, $loginName, $data) = @_;

    return unless $loginName;
    $loginName = lc( $loginName ) unless $this->{caseSensitiveLogin};

    $data ||= $this->{data};
    my $dn = TWiki::Sandbox::untaintUnchecked($data->{"U2DN::$loginName"});

    # Cache single account
    if (defined($dn) || $dn eq '') {
        # Make sure the user has been retreived from LDAP
        $this->checkCacheForLoginName($loginName, $data);
        $dn = TWiki::Sandbox::untaintUnchecked($data->{"U2DN::$loginName"});
    }

    return $dn;
} 

-- TWiki:Main/MauroFasolo - 2013-12-04

Grazie Mauro for reporting this and for supplying a fix! Someone needs to update the LdapContrib.

-- TWiki:Main.PeterThoeny - 2013-12-04