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    }

    my $dbm = $self->_open_dbm( $type, $path )
      or Carp::croak( qq/Failed to open database '$path'. Reason: '$!'/ );

    return $self->SUPER::init($params);
}

sub _open_dbm {
    my $self  = shift;
    my $type  = shift || $self->type;
    my $path  = shift || $self->path;

    my $flags = $type eq 'GDBM' ? &GDBM_File::GDBM_READER : &Fcntl::O_RDONLY;
    my $class = sprintf( '%s_File', $type );
    my @args  = ( $path );

    unless ( $type eq 'CDB' ) {
        push( @args, $flags, 0644 );
    }

    return $class->TIEHASH(@args);
}

sub check {
    my ( $self, $username, $password ) = @_;

    my ( $path, $dbm, $encrypted ) = ( $self->path, undef, undef );

    unless ( $dbm = $self->_open_dbm ) {

        $self->log->error( qq/Failed to open database '$path'. Reason: '$!'/ )
          if $self->log;

        return 0;
    }

    unless (    defined( $encrypted = $dbm->FETCH( $username        ) )
             || defined( $encrypted = $dbm->FETCH( $username . "\0" ) ) ) {

        $self->log->debug( qq/User '$username' was not found in database '$path'./ )
          if $self->log;

        return 0;
    }

    chop($encrypted) if substr( $encrypted, -1 ) eq "\0";

    $encrypted = ( split( ':', $encrypted, 3 ) )[0];

    unless ( defined $encrypted && length $encrypted ) {

        $self->log->debug( qq/Encrypted password for user '$username' is null./ )
          if $self->log;

        return 0;
    }

    unless ( $self->check_password( $password, $encrypted ) ) {

        $self->log->debug( qq/Failed to authenticate user '$username'. Reason: 'Invalid credentials'/ )
          if $self->log;

        return 0;
    }

    $self->log->debug( qq/Successfully authenticated user '$username'./ )
      if $self->log;

    return 1;
}

1;

__END__

=head1 NAME

Authen::Simple::DBM - Simple DBM authentication

=head1 SYNOPSIS

    use Authen::Simple::DBM;
    
    my $dbm = Authen::Simple::DBM->new(
        path => '/var/db/www/passwd'
    );
    
    if ( $dbm->authenticate( $username, $password ) ) {
        # successfull authentication
    }
    
    # or as a mod_perl Authen handler

    PerlModule Authen::Simple::Apache
    PerlModule Authen::Simple::DBM

    PerlSetVar AuthenSimpleDBM_path "/var/db/www/passwd"

    <Location /protected>
      PerlAuthenHandler Authen::Simple::DBM
      AuthType          Basic
      AuthName          "Protected Area"
      Require           valid-user
    </Location>

=head1 DESCRIPTION

DBM authentication.

=head1 METHODS

=over 4

=item * new

This method takes a hash of parameters. The following options are
valid:

=over 8