Koha/C4/Auth_with_cas.pm
Julian Maurice 28bb1a3ed0 Bug 7745: Wrong service name for CAS authentification
When behind a proxy, Koha give a wrong service name to CAS server
(SCRIPT_URI environment variable). It now uses OPACBaseURL syspref.

Note: despite the OPACBaseURL description, you have to enter the
*full* URL (ie: with http:// or https://) in the syspref. (see Bug
7770)
Signed-off-by: Pierre Angot <tredok.pierre@gmail.com>
Signed-off-by: Paul Poulain <paul.poulain@biblibre.com>
2012-03-22 06:21:23 +01:00

226 lines
7.1 KiB
Perl

package C4::Auth_with_cas;
# Copyright 2009 BibLibre SARL
#
# This file is part of Koha.
#
# Koha is free software; you can redistribute it and/or modify it under the
# terms of the GNU General Public License as published by the Free Software
# Foundation; either version 2 of the License, or (at your option) any later
# version.
#
# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License along
# with Koha; if not, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
use strict;
use warnings;
use C4::Debug;
use C4::Context;
use C4::Utils qw( :all );
use Authen::CAS::Client;
use CGI;
use FindBin;
use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $debug);
BEGIN {
require Exporter;
$VERSION = 3.03; # set the version for version checking
$debug = $ENV{DEBUG};
@ISA = qw(Exporter);
@EXPORT = qw(check_api_auth_cas checkpw_cas login_cas logout_cas login_cas_url);
}
my $context = C4::Context->new() or die 'C4::Context->new failed';
my $defaultcasserver;
my $casservers;
my $yamlauthfile = "../C4/Auth_cas_servers.yaml";
# If there's a configuration for multiple cas servers, then we get it
if (multipleAuth()) {
($defaultcasserver, $casservers) = YAML::LoadFile(qq($FindBin::Bin/$yamlauthfile));
$defaultcasserver = $defaultcasserver->{'default'};
} else {
# Else, we fall back to casServerUrl syspref
$defaultcasserver = 'default';
$casservers = { 'default' => C4::Context->preference('casServerUrl') };
}
# Is there a configuration file for multiple cas servers?
sub multipleAuth {
return (-e qq($FindBin::Bin/$yamlauthfile));
}
# Returns configured CAS servers' list if multiple authentication is enabled
sub getMultipleAuth {
return $casservers;
}
# Logout from CAS
sub logout_cas {
my ($query) = @_;
my $uri = C4::Context->preference('OPACBaseURL') . $query->script_name();
my $casparam = $query->param('cas');
# FIXME: This should be more generic and handle whatever parameters there might be
$uri .= "?cas=" . $casparam if (defined $casparam);
$casparam = $defaultcasserver if (not defined $casparam);
my $cas = Authen::CAS::Client->new($casservers->{$casparam});
print $query->redirect( $cas->logout_url($uri));
}
# Login to CAS
sub login_cas {
my ($query) = @_;
my $uri = C4::Context->preference('OPACBaseURL') . $query->script_name();
my $casparam = $query->param('cas');
# FIXME: This should be more generic and handle whatever parameters there might be
$uri .= "?cas=" . $casparam if (defined $casparam);
$casparam = $defaultcasserver if (not defined $casparam);
my $cas = Authen::CAS::Client->new($casservers->{$casparam});
print $query->redirect( $cas->login_url($uri));
}
# Returns CAS login URL with callback to the requesting URL
sub login_cas_url {
my ($query, $key) = @_;
my $uri = C4::Context->preference('OPACBaseURL') . $query->script_name();
my $casparam = $query->param('cas');
# FIXME: This should be more generic and handle whatever parameters there might be
$uri .= "?cas=" . $casparam if (defined $casparam);
$casparam = $defaultcasserver if (not defined $casparam);
$casparam = $key if (defined $key);
my $cas = Authen::CAS::Client->new($casservers->{$casparam});
return $cas->login_url($uri);
}
# Checks for password correctness
# In our case : is there a ticket, is it valid and does it match one of our users ?
sub checkpw_cas {
$debug and warn "checkpw_cas";
my ($dbh, $ticket, $query) = @_;
my $retnumber;
my $uri = C4::Context->preference('OPACBaseURL') . $query->script_name();
my $casparam = $query->param('cas');
# FIXME: This should be more generic and handle whatever parameters there might be
$uri .= "?cas=" . $casparam if (defined $casparam);
$casparam = $defaultcasserver if (not defined $casparam);
my $cas = Authen::CAS::Client->new($casservers->{$casparam});
# If we got a ticket
if ($ticket) {
$debug and warn "Got ticket : $ticket";
# We try to validate it
my $val = $cas->service_validate($uri, $ticket );
# If it's valid
if ( $val->is_success() ) {
my $userid = $val->user();
$debug and warn "User CAS authenticated as: $userid";
# Does it match one of our users ?
my $sth = $dbh->prepare("select cardnumber from borrowers where userid=?");
$sth->execute($userid);
if ( $sth->rows ) {
$retnumber = $sth->fetchrow;
return ( 1, $retnumber, $userid );
}
$sth = $dbh->prepare("select userid from borrowers where cardnumber=?");
$sth->execute($userid);
if ( $sth->rows ) {
$retnumber = $sth->fetchrow;
return ( 1, $retnumber, $userid );
}
# If we reach this point, then the user is a valid CAS user, but not a Koha user
$debug and warn "User $userid is not a valid Koha user";
} else {
$debug and warn "Invalid session ticket : $ticket";
return 0;
}
}
return 0;
}
# Proxy CAS auth
sub check_api_auth_cas {
$debug and warn "check_api_auth_cas";
my ($dbh, $PT, $query) = @_;
my $retnumber;
my $url = C4::Context->preference('OPACBaseURL') . $query->script_name();
my $casparam = $query->param('cas');
$casparam = $defaultcasserver if (not defined $casparam);
my $cas = Authen::CAS::Client->new($casservers->{$casparam});
# If we have a Proxy Ticket
if ($PT) {
my $r = $cas->proxy_validate( $url, $PT );
# If the PT is valid
if ( $r->is_success ) {
# We've got a username !
$debug and warn "User authenticated as: ", $r->user, "\n";
$debug and warn "Proxied through:\n";
$debug and warn " $_\n" for $r->proxies;
my $userid = $r->user;
# Does it match one of our users ?
my $sth = $dbh->prepare("select cardnumber from borrowers where userid=?");
$sth->execute($userid);
if ( $sth->rows ) {
$retnumber = $sth->fetchrow;
return ( 1, $retnumber, $userid );
}
$sth = $dbh->prepare("select userid from borrowers where cardnumber=?");
return $r->user;
$sth->execute($userid);
if ( $sth->rows ) {
$retnumber = $sth->fetchrow;
return ( 1, $retnumber, $userid );
}
# If we reach this point, then the user is a valid CAS user, but not a Koha user
$debug and warn "User $userid is not a valid Koha user";
} else {
$debug and warn "Proxy Ticket authentication failed";
return 0;
}
}
return 0;
}
1;
__END__
=head1 NAME
C4::Auth - Authenticates Koha users
=head1 SYNOPSIS
use C4::Auth_with_cas;
=cut
=head1 SEE ALSO
CGI(3)
Authen::CAS::Client
=cut