1 package C4::Auth_with_shibboleth;
3 # Copyright 2011 BibLibre
5 # This file is part of Koha.
7 # Koha is free software; you can redistribute it and/or modify it under the
8 # terms of the GNU General Public License as published by the Free Software
9 # Foundation; either version 2 of the License, or (at your option) any later
12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14 # A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License along
17 # with Koha; if not, write to the Free Software Foundation, Inc.,
18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
28 use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS $debug);
32 $VERSION = 3.03; # set the version for version checking
35 @EXPORT = qw(logout_shib login_shib_url checkpw_shib get_login_shib);
37 my $context = C4::Context->new() or die 'C4::Context->new failed';
38 my $shib = C4::Context->config('shibboleth') or croak 'No <shibboleth> in koha-conf.xml';
39 my $shibbolethMatchField = $shib->{matchpoint} or croak 'No <matchpoint> defined in koha-conf.xml';
40 my $shibbolethMatchAttribute = $shib->{mapping}->{$shibbolethMatchField}->{is} or croak 'Matchpoint not mapped in koha-conf.xml';
41 my $protocol = "https://";
43 # Logout from Shibboleth
46 my $uri = $protocol . C4::Context->preference('OPACBaseURL');
47 print $query->redirect( $uri . "/Shibboleth.sso/Logout?return=$uri" );
50 # Returns Shibboleth login URL with callback to the requesting URL
54 my $param = $protocol . C4::Context->preference('OPACBaseURL') . $query->script_name();
55 if ( $query->query_string() ) {
56 $param = $param . '%3F' . $query->query_string();
58 my $uri = $protocol . C4::Context->preference('OPACBaseURL') . "/Shibboleth.sso/Login?target=$param";
62 # Returns shibboleth user login
65 # In case of a Shibboleth authentication, we expect a shibboleth user attribute
66 # to contain the login match point of the shibboleth-authenticated user. This match
67 # point is configured in koha-conf.xml
69 # Shibboleth attributes are mapped into http environmement variables, so we're getting
70 # the match point of the user this way
72 $debug and warn "koha borrower field to match: $shibbolethMatchField";
73 $debug and warn "shibboleth attribute to match: $shibbolethMatchAttribute";
74 $debug and warn "$shibbolethMatchAttribute value: $ENV{$shibbolethMatchAttribute}";
76 return $ENV{$shibbolethMatchAttribute} || '';
79 # Checks for password correctness
80 # In our case : does the given attribute match one of our users ?
82 $debug and warn "checkpw_shib";
84 my ( $dbh, $userid ) = @_;
86 $debug and warn "User Shibboleth-authenticated as: $userid";
88 # Does the given shibboleth attribute value ($userid) match a valid koha user ?
89 my $sth = $dbh->prepare("select cardnumber, userid from borrowers where $shibbolethMatchField=?");
90 $sth->execute($userid);
92 my @retvals = $sth->fetchrow;
93 $retnumber = $retvals[1];
94 $userid = $retvals[0];
95 return ( 1, $retnumber, $userid );
98 # If we reach this point, the user is not a valid koha user
99 $debug and warn "User $userid is not a valid Koha user";
108 C4::Auth_with_shibboleth
112 use C4::Auth_with_shibboleth;
116 This module is specific to Shibboleth authentication in koha and relies heavily upon the native shibboleth service provider package in your operating system.
120 To use this type of authentication these additional packages are required:
134 shibboleth-sp2-schemas
138 We let the native shibboleth service provider packages handle all the complexities of shibboleth negotiation for us, and configuring this is beyond the scope of this documentation.
140 But to sum up, to get shibboleth working in koha, as a minimum you will need to:
146 Create some metadata for your koha instance (if you're in a single instance setup then the default metadata available at https://youraddress.com/Shibboleth.sso/Metadata should be adequate)
150 Swap metadata with your Identidy Provider (IdP)
154 Map their attributes to what you want to see in koha
158 Tell apache that we wish to allow koha to authenticate via shibboleth.
160 This is as simple as adding the below to your virtualhost config:
169 Configure koha to listen for shibboleth environment variables.
171 This is as simple as enabling B<useshibboleth> in koha-conf.xml:
173 <useshibboleth>1</useshibboleth>
177 Map shibboleth attributes to koha fields, and configure authentication match point in koha-conf.xml.
180 <matchpoint>userid<matchpoint> <!-- koha borrower field to match upon -->
182 <userid is="eduPersonID"></userid> <!-- koha borrower field to shibboleth attribute mapping -->
186 Note: The minimum you need here is a <matchpoint> block, containing a valid column name from the koha borrowers table, and a <mapping> block containing a relation between the chosen matchpoint and the shibboleth attribute name.
190 It should be as simple as that; you should now be able to login via shibboleth in the opac.
192 If you need more help configuring your B<S>ervice B<P>rovider to authenticate against a chosen B<Id>entity B<P>rovider then it might be worth taking a look at the community wiki L<page|http://wiki.koha-community.org/wiki/Shibboleth_Configuration>
198 Sends a logout signal to the native shibboleth service provider and then logs out of koha. Depending upon the native service provider configuration and identity provider capabilities this may or may not perform a single sign out action.
202 =head2 login_shib_url
204 Given a query, this will return a shibboleth login url with return code to page with given given query.
206 my $shibLoginURL = login_shib_url($query);
208 =head2 get_login_shib
210 Returns the shibboleth login attribute should it be found present in the http session
212 my $shib_login = get_login_shib();
216 Given a database handle and a shib_login attribute, this routine checks for a matching local user and if found returns true, their cardnumber and their userid. If a match is not found, then this returns false.
218 my ( $retval, $retcard, $retuserid ) = C4::Auth_with_shibboleth::checkpw_shib( $dbh, $shib_login );