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 = 3.07.00.049; # 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 "Problem when validating ticket : $ticket"; $debug and warn "Authen::CAS::Client::Response::Error: " . $val->error() if $val->is_error(); $debug and warn "Authen::CAS::Client::Response::Failure: " . $val->message() if $val->is_failure(); $debug and warn Data::Dumper::Dumper($@) if $val->is_error() or $val->is_failure(); 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