Modifications de nocatauth

Bonjour,

Je souhaite apporter quelques modifications à un script écrit PERL pour NoCatAuth (service d'authentification pour passerelle)
Le but est d'ajouter quelques verifications au formulaire d'identification :
Vérification de la case à cocher "j'accepte les CGU" et ajout d'un message "Mauvais login/mdp" en cas d'erreur
Je comprend rien au script, j'ai essayé de greffer du javascript mais ca ne sert a rien face au cgi...
Je joint le code :

#!/usr/bin/perl -w

###
##
# login
#
# The CGI that does the deed.
#
# * Present a form
# * Check it when filled in
# * Notify the connecting IP of the outcome
# * Inform and optionally redirect the user
#
# RJF & SDE, 7.4.01
#
# License: GPL.
##
###

#use lib '/usr/local/nocat'; # or wherever.
use lib '../lib/';
use NoCat qw( ANONYMOUS );
use strict;

my $authserv = NoCat->auth_service( ConfigFile => $ENV{NOCAT} );
my $cgi = $authserv->cgi;
my $params = $cgi->Vars;

# Debug configuration setup.
$authserv->check_config(qw(
LoginForm FatalForm RenewForm LoginOKForm ExpiredForm
LoginGreeting LoginMissing LoginBadUser LoginBadPass
));

$authserv->log( 7, sprintf( "User %s from %s requests %s",
$params->{user} || "UNKNOWN", $cgi->remote_host,
lc( $params->{mode} ) || "form" )
);

# Figure out which image button was clicked (since they don't have value="" attributes).
if (my ($button) = grep { defined $params->{"mode_$_.x"} } qw( login skip logout )) {
delete $params->{$_} for ( "mode_$button.x", "mode_$button.y" );
$params->{mode} = $button;
}

# Have we filled in the form yet? No? If not, present one.
$authserv->display( LoginForm => "LoginGreeting" ) unless $params->{mode};

# Verify prerequisites.
$authserv->display( FatalForm => "Your MAC address is undefined. Problem with the gateway?" )
unless $params->{mac};
$authserv->display( FatalForm => "Your gateway token is undefined. Problem with the gateway?" )
unless $params->{token};

# If the user skipped authentication...
if ( $params->{user} eq ANONYMOUS or $params->{mode} =~ /^skip/io ) {
$params->{user} = ANONYMOUS;
delete $params->{member};

# Otherwise, attempt to authenticate the user.
} else {
# Are we just missing required fields?
$authserv->display( LoginForm => "LoginMissing" )
unless $params->{user} and $params->{pass};

# Does the login info match what we have on file?
my $user = $authserv->user->fetch( $params->{user} );

$authserv->display( LoginForm => "LoginBadUser" ) unless $user->id;
$authserv->display( LoginForm => "LoginBadPass" ) unless $user->authenticate( $params->{pass} );

# Set the service class based on the user's authorization (if any).
my $member = join( " ", $user->groups );
$params->{member} = $member if $member;
}

# Finally, notify the gateway (and the user) as to the outcome.
my ( $form, $gw );

# Either we're requesting the renewal popup box...
if ( $params->{mode} =~ /^popup/io ) {
$form = ( $params->{gateway} ? "PassiveRenewForm" : "RenewForm" );
$params->{redirect} = $authserv->renew_url;

# Or we're either logging in, or renewing, in which case, notify the gateway.
} elsif ($gw = $authserv->notify( Permit => $params )) {
if ( $gw->{Error} ) {
# Oddly enough, this isn't really success.
$form = "ExpiredForm";

} elsif ( $params->{mode} =~ /^renew/io ) {
if ( $params->{gateway} ) {
$form = "PassiveRenewForm";
# $params->{redirect} = $gw->{redirect};
} else {
$form = "RenewForm";
$params->{redirect} = $authserv->renew_url( $gw );
}

} else {
$form = "LoginOKForm";
# $params->{redirect} = $gw->{redirect} if $gw->{redirect};
$params->{popup} = $authserv->popup_url( $gw );
# set the javascript *link* to the popup box.
# warn "+ redirect:[$params->{redirect}] popup:[$params->{popup}]\n";
}

# Or something's really wrong.
} else {
my $err = $!;
if ($err =~ /Connection refused/io) {
$authserv->display( LoginForm => "Can't connect to your gateway. If it's behind a NAT'ed firewall, it needs to run in Passive Mode." );
} else {
$authserv->display( LoginForm => "Authentication error for connection $params->{token}: $!" );
}
}

$params->{logout} = $authserv->logout_url; # Make a logout link.

# Execute on the plan and tell a compelling story to the user.
$authserv->success( $form => $params );

# Fin


Merci d'avance