1 package C4::Auth_with_cas;
3 # Copyright 2009 BibLibre SARL
5 # This file is part of Koha.
7 # Koha is free software; you can redistribute it and/or modify it
8 # under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3 of the License, or
10 # (at your option) any later version.
12 # Koha is distributed in the hope that it will be useful, but
13 # WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with Koha; if not, see <http://www.gnu.org/licenses>.
24 use Koha::AuthUtils qw( get_script_name );
25 use Authen::CAS::Client;
32 our (@ISA, @EXPORT_OK);
37 @EXPORT_OK = qw(check_api_auth_cas checkpw_cas login_cas logout_cas login_cas_url logout_if_required multipleAuth getMultipleAuth);
41 my $yamlauthfile = C4::Context->config('intranetdir') . "/C4/Auth_cas_servers.yaml";
44 # If there's a configuration for multiple cas servers, then we get it
46 ($defaultcasserver, $casservers) = YAML::XS::LoadFile($yamlauthfile);
47 $defaultcasserver = $defaultcasserver->{'default'};
49 # Else, we fall back to casServerUrl syspref
50 $defaultcasserver = 'default';
51 $casservers = { 'default' => C4::Context->preference('casServerUrl') };
58 # Is there a configuration file for multiple cas servers?
60 return (-e qq($yamlauthfile));
63 # Returns configured CAS servers' list if multiple authentication is enabled
70 my ( $query, $type ) = @_;
71 my ( $cas, $uri ) = _get_cas_and_service( $query, undef, $type );
73 # We don't want to keep triggering a logout, if we got here,
74 # the borrower is already logged out of Koha
75 $uri =~ s/\?logout\.x=1//;
77 my $logout_url = $cas->logout_url( url => $uri );
78 $logout_url =~ s/url=/service=/
79 if C4::Context->preference('casServerVersion') eq '3';
81 print $query->redirect($logout_url);
87 my ($query, $type) = @_;
88 my ( $cas, $uri ) = _get_cas_and_service($query, undef, $type);
89 print $query->redirect( $cas->login_url($uri));
92 # Returns CAS login URL with callback to the requesting URL
94 my ( $query, $key, $type ) = @_;
95 my ( $cas, $uri ) = _get_cas_and_service( $query, $key, $type );
96 return $cas->login_url($uri);
99 # Checks for password correctness
100 # In our case : is there a ticket, is it valid and does it match one of our users ?
102 my ($dbh, $ticket, $query, $type) = @_;
104 my ( $cas, $uri ) = _get_cas_and_service($query, undef, $type);
109 # We try to validate it
110 my $val = $cas->service_validate($uri, $ticket );
113 if ( $val->is_success() ) {
115 my $userid = $val->user();
117 # we should store the CAS ticekt too, we need this for single logout https://apereo.github.io/cas/4.2.x/protocol/CAS-Protocol-Specification.html#233-single-logout
119 # Does it match one of our users ?
120 my $sth = $dbh->prepare("select cardnumber from borrowers where userid=?");
121 $sth->execute($userid);
123 $retnumber = $sth->fetchrow;
124 return ( 1, $retnumber, $userid, $ticket );
126 $sth = $dbh->prepare("select userid from borrowers where cardnumber=?");
127 $sth->execute($userid);
129 $retnumber = $sth->fetchrow;
130 return ( 1, $retnumber, $userid, $ticket );
133 # If we reach this point, then the user is a valid CAS user, but not a Koha user
134 Koha::Logger->get->info("User $userid is not a valid Koha user");
137 my $logger = Koha::Logger->get;
138 $logger->debug("Problem when validating ticket : $ticket");
139 $logger->debug("Authen::CAS::Client::Response::Error: " . $val->error()) if $val->is_error();
140 $logger->debug("Authen::CAS::Client::Response::Failure: " . $val->message()) if $val->is_failure();
141 $logger->debug(Data::Dumper::Dumper($@)) if $val->is_error() or $val->is_failure();
149 sub check_api_auth_cas {
150 my ($dbh, $PT, $query, $type) = @_;
152 my ( $cas, $uri ) = _get_cas_and_service($query, undef, $type);
154 # If we have a Proxy Ticket
156 my $r = $cas->proxy_validate( $uri, $PT );
159 if ( $r->is_success ) {
161 # We've got a username !
162 my $userid = $r->user;
164 # we should store the CAS ticket too, we need this for single logout https://apereo.github.io/cas/4.2.x/protocol/CAS-Protocol-Specification.html#233-single-logout
166 # Does it match one of our users ?
167 my $sth = $dbh->prepare("select cardnumber from borrowers where userid=?");
168 $sth->execute($userid);
170 $retnumber = $sth->fetchrow;
171 return ( 1, $retnumber, $userid, $PT );
173 $sth = $dbh->prepare("select userid from borrowers where cardnumber=?");
175 $sth->execute($userid);
177 $retnumber = $sth->fetchrow;
178 return ( 1, $retnumber, $userid, $PT );
181 # If we reach this point, then the user is a valid CAS user, but not a Koha user
182 Koha::Logger->get->info("User $userid is not a valid Koha user");
185 Koha::Logger->get->debug("Proxy Ticket authentication failed");
192 # Get CAS handler and service URI
193 sub _get_cas_and_service {
195 my $key = shift; # optional
198 my $uri = _url_with_get_params($query, $type);
200 my $casparam = $defaultcasserver;
201 $casparam = $query->param('cas') if defined $query->param('cas');
202 $casparam = $key if defined $key;
203 my $cas = Authen::CAS::Client->new( $casservers->{$casparam} );
205 return ( $cas, $uri );
208 # Get the current URL with parameters contained directly into URL (GET params)
209 # This method replaces $query->url() which will give both GET and POST params
210 sub _url_with_get_params {
216 ? C4::Context->preference('OPACBaseURL')
217 : C4::Context->preference('staffClientBaseURL');
218 $uri_base_part .= get_script_name();
220 my $uri_params_part = '';
221 foreach my $param ( $query->url_param() ) {
222 # url_param() always returns parameters that were deleted by delete()
223 # This additional check ensure that parameter was not deleted.
224 my $uriPiece = $query->param($param);
226 $uri_params_part .= '&' if $uri_params_part;
227 $uri_params_part .= $param . '=';
228 $uri_params_part .= URI::Escape::uri_escape( $uriPiece );
231 $uri_base_part .= '?' if $uri_params_part;
233 return $uri_base_part . $uri_params_part;
236 =head2 logout_if_required
238 If using CAS, this subroutine will trigger single-signout of the CAS server.
242 sub logout_if_required {
244 # Check we havent been hit by a logout call
245 my $xml = $query->param('logoutRequest');
246 return 0 unless $xml;
248 my $dom = XML::LibXML->load_xml(string => $xml);
250 foreach my $node ($dom->findnodes('/samlp:LogoutRequest')){
251 # We got a cas single logout request from a cas server;
252 $ticket = $node->findvalue('./samlp:SessionIndex');
255 return 0 unless $ticket;
257 # We've been called as part of the single logout destroy the session associated with the cas ticket
258 my $params = C4::Auth::_get_session_params();
259 my $success = CGI::Session->find( $params->{dsn}, sub {delete_cas_session(@_, $ticket)}, $params->{dsn_args} );
261 print $query->header;
265 sub delete_cas_session {
268 if ($session->param('cas_ticket') && $session->param('cas_ticket') eq $ticket ) {
279 C4::Auth - Authenticates Koha users
283 use C4::Auth_with_cas;