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package Apache::AuthenPasswd;

use strict;
use mod_perl;

$Apache::AuthenPasswd::VERSION = '0.12';

# setting the constants to help identify which version of mod_perl
# is installed
use constant MP2 => ($mod_perl::VERSION >= 1.99);

# test for the version of mod_perl, and use the appropriate libraries
BEGIN {
        if (MP2) {
                require Apache::Const;
                require Apache::Access;
                require Apache::Connection;
                require Apache::Log;
                require Apache::RequestRec;
                require Apache::RequestUtil;
                Apache::Const->import(-compile => 'HTTP_UNAUTHORIZED','OK');
        } else {
                require Apache::Constants;
                Apache::Constants->import('HTTP_UNAUTHORIZED','OK');
        }
}

sub handler {
    my $r = shift;
    my($res, $sent_pwd) = $r->get_basic_auth_pw;
    return $res if $res; #decline if not Basic

    my $name = MP2 ? $r->user : $r->connection->user;

    if ($name eq "") {
	$r->note_basic_auth_failure;
        MP2 ?  $r->log_error("Apache::AuthenPasswd - no username given", $r->uri) : $r->log_reason("Apache::AuthenPasswd - no username given", $r->uri);
        return MP2 ? Apache::HTTP_UNAUTHORIZED : Apache::Constants::HTTP_UNAUTHORIZED;
    }

    my ($user, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwnam $name;

    unless ($user) {
	$r->note_basic_auth_failure;
	MP2 ? $r->log_error("Apache::AuthenPasswd - user $name: unknown", $r->uri) : $r->log_reason("Apache::AuthenPasswd - user $name: unknown", $r->uri);
        return MP2 ? Apache::HTTP_UNAUTHORIZED : Apache::Constants::HTTP_UNAUTHORIZED;
    }

    if(crypt($sent_pwd, $passwd) eq $passwd) {
	return MP2 ? Apache::OK : Apache::Constants::OK;
    } else {
	$r->note_basic_auth_failure;
	MP2 ? $r->log_error("Apache::AuthenPasswd - user $name: bad password", $r->uri) : $r->log_reason("Apache::AuthenPasswd - user $name: bad password", $r->uri);
        return MP2 ? Apache::HTTP_UNAUTHORIZED : Apache::Constants::HTTP_UNAUTHORIZED;
    }

	return MP2 ? Apache::OK : Apache::Constants::OK;
}

1;

__END__

=head1 NAME

Apache::AuthenPasswd - mod_perl /etc/passwd Authentication module

=head1 SYNOPSIS

    <Directory /foo/bar>
    # This is the standard authentication stuff
    AuthName "Foo Bar Authentication"
    AuthType Basic

    PerlAuthenHandler Apache::AuthenPasswd

    # Standard require stuff, /etc/passwd users or /etc/group groups, and
    # "valid-user" all work OK
    require user username1 username2 ...
    require group groupname1 groupname2 ... # [Need Apache::AuthzPasswd]
    require valid-user

    # The following is actually only needed when authorizing
    # against /etc/group. This is a separate module.
    PerlAuthzHandler Apache::AuthzPasswd

    </Directory>

    These directives can also be used in the <Location> directive or in
    an .htaccess file.

= head1 DESCRIPTION

        **************** NOTICE *********************
        Please, please, realize that this module will
        only work with passwords that are stored in
        /etc/passwd.  Most systems use shadow
        passwords now, and the call that this module
        uses to access the password ONLY checks for
        the password in the /etc/passwd file.  Also,
        the call that is needed to access passwords