733 lines
26 KiB
Perl
733 lines
26 KiB
Perl
# -*- tab-width: 8 -*-
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# NOTE: This file uses 8-character tabs; do not change the tab size!
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package C4::Auth;
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# Copyright 2000-2002 Katipo Communications
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#
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# This file is part of Koha.
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#
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# Koha is free software; you can redistribute it and/or modify it under the
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# terms of the GNU General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# Koha is distributed in the hope that it will be useful, but WITHOUT ANY
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# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along with
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# Koha; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
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# Suite 330, Boston, MA 02111-1307 USA
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use strict;
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use Digest::MD5 qw(md5_base64);
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require Exporter;
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use C4::Context;
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use C4::Output; # to get the template
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use C4::Interface::CGI::Output;
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use C4::Circulation::Circ2; # getpatroninformation
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use C4::Koha;
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# use Net::LDAP;
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# use Net::LDAP qw(:all);
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use vars qw($VERSION @ISA @EXPORT @EXPORT_OK %EXPORT_TAGS);
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# set the version for version checking
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$VERSION = 0.01;
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=head1 NAME
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C4::Auth - Authenticates Koha users
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=head1 SYNOPSIS
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use CGI;
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use C4::Auth;
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my $query = new CGI;
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my ($template, $borrowernumber, $cookie)
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= get_template_and_user({template_name => "opac-main.tmpl",
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query => $query,
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type => "opac",
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authnotrequired => 1,
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flagsrequired => {borrow => 1},
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});
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print $query->header(
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-type => guesstype($template->output),
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-cookie => $cookie
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), $template->output;
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=head1 DESCRIPTION
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The main function of this module is to provide
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authentification. However the get_template_and_user function has
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been provided so that a users login information is passed along
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automatically. This gets loaded into the template.
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=head1 FUNCTIONS
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=over 2
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=cut
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@ISA = qw(Exporter);
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@EXPORT = qw(
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&checkauth
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&get_template_and_user
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);
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=item get_template_and_user
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my ($template, $borrowernumber, $cookie)
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= get_template_and_user({template_name => "opac-main.tmpl",
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query => $query,
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type => "opac",
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authnotrequired => 1,
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flagsrequired => {borrow => 1},
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});
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This call passes the C<query>, C<flagsrequired> and C<authnotrequired>
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to C<&checkauth> (in this module) to perform authentification.
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See C<&checkauth> for an explanation of these parameters.
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The C<template_name> is then used to find the correct template for
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the page. The authenticated users details are loaded onto the
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template in the HTML::Template LOOP variable C<USER_INFO>. Also the
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C<sessionID> is passed to the template. This can be used in templates
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if cookies are disabled. It needs to be put as and input to every
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authenticated page.
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More information on the C<gettemplate> sub can be found in the
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Output.pm module.
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=cut
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sub get_template_and_user {
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my $in = shift;
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my $template =
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gettemplate( $in->{'template_name'}, $in->{'type'}, $in->{'query'} );
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my ( $user, $cookie, $sessionID, $flags ) = checkauth(
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$in->{'query'},
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$in->{'authnotrequired'},
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$in->{'flagsrequired'},
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$in->{'type'}
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);
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my $borrowernumber;
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if ($user) {
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$template->param( loggedinusername => $user );
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$template->param( sessionID => $sessionID );
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$borrowernumber = getborrowernumber($user);
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my ( $borr, $alternativeflags ) =
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getpatroninformation( undef, $borrowernumber );
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my @bordat;
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$bordat[0] = $borr;
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$template->param( USER_INFO => \@bordat, );
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# We are going to use the $flags returned by checkauth
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# to create the template's parameters that will indicate
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# which menus the user can access.
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if ( $flags && $flags->{superlibrarian} == 1 ) {
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$template->param( CAN_user_circulate => 1 );
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$template->param( CAN_user_catalogue => 1 );
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$template->param( CAN_user_parameters => 1 );
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$template->param( CAN_user_borrowers => 1 );
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$template->param( CAN_user_permission => 1 );
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$template->param( CAN_user_reserveforothers => 1 );
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$template->param( CAN_user_borrow => 1 );
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$template->param( CAN_user_reserveforself => 1 );
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$template->param( CAN_user_editcatalogue => 1 );
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$template->param( CAN_user_updatecharge => 1 );
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$template->param( CAN_user_acquisition => 1 );
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$template->param( CAN_user_management => 1 );
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$template->param( CAN_user_tools => 1 );
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}
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if ( $flags && $flags->{circulate} == 1 ) {
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$template->param( CAN_user_circulate => 1 );
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}
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if ( $flags && $flags->{catalogue} == 1 ) {
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$template->param( CAN_user_catalogue => 1 );
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}
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if ( $flags && $flags->{parameters} == 1 ) {
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$template->param( CAN_user_parameters => 1 );
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$template->param( CAN_user_management => 1 );
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$template->param( CAN_user_tools => 1 );
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}
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if ( $flags && $flags->{borrowers} == 1 ) {
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$template->param( CAN_user_borrowers => 1 );
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}
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if ( $flags && $flags->{permissions} == 1 ) {
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$template->param( CAN_user_permission => 1 );
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}
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if ( $flags && $flags->{reserveforothers} == 1 ) {
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$template->param( CAN_user_reserveforothers => 1 );
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}
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if ( $flags && $flags->{borrow} == 1 ) {
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$template->param( CAN_user_borrow => 1 );
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}
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if ( $flags && $flags->{reserveforself} == 1 ) {
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$template->param( CAN_user_reserveforself => 1 );
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}
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if ( $flags && $flags->{editcatalogue} == 1 ) {
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$template->param( CAN_user_editcatalogue => 1 );
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}
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if ( $flags && $flags->{updatecharges} == 1 ) {
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$template->param( CAN_user_updatecharge => 1 );
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}
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if ( $flags && $flags->{acquisition} == 1 ) {
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$template->param( CAN_user_acquisition => 1 );
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}
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if ( $flags && $flags->{management} == 1 ) {
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$template->param( CAN_user_management => 1 );
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$template->param( CAN_user_tools => 1 );
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}
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if ( $flags && $flags->{tools} == 1 ) {
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$template->param( CAN_user_tools => 1 );
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}
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}
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unless ( $in->{'type'} eq "intranet" ) {
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$template->param(
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suggestion => C4::Context->preference("suggestion"),
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virtualshelves => C4::Context->preference("virtualshelves"),
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OpacNav => C4::Context->preference("OpacNav"),
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opacheader => C4::Context->preference("opacheader"),
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opaccredits => C4::Context->preference("opaccredits"),
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opacsmallimage => C4::Context->preference("opacsmallimage"),
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opaclayoutstylesheet =>
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C4::Context->preference("opaclayoutstylesheet"),
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opaccolorstylesheet =>
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C4::Context->preference("opaccolorstylesheet"),
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opaclanguagesdisplay =>
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C4::Context->preference("opaclanguagesdisplay"),
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TemplateEncoding => C4::Context->preference("TemplateEncoding"),
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opacuserlogin => C4::Context->preference("opacuserlogin"),
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opacbookbag => C4::Context->preference("opacbookbag"),
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);
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}
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$template->param(
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TemplateEncoding => C4::Context->preference('TemplateEncoding'),
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AmazonContent => C4::Context->preference('AmazonContent'),
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LibraryName => C4::Context->preference('LibraryName'),
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branchname => C4::Context->userenv->{'branchname'},
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);
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return ( $template, $borrowernumber, $cookie );
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}
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=item checkauth
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($userid, $cookie, $sessionID) = &checkauth($query, $noauth, $flagsrequired, $type);
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Verifies that the user is authorized to run this script. If
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the user is authorized, a (userid, cookie, session-id, flags)
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quadruple is returned. If the user is not authorized but does
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not have the required privilege (see $flagsrequired below), it
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displays an error page and exits. Otherwise, it displays the
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login page and exits.
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Note that C<&checkauth> will return if and only if the user
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is authorized, so it should be called early on, before any
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unfinished operations (e.g., if you've opened a file, then
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C<&checkauth> won't close it for you).
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C<$query> is the CGI object for the script calling C<&checkauth>.
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The C<$noauth> argument is optional. If it is set, then no
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authorization is required for the script.
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C<&checkauth> fetches user and session information from C<$query> and
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ensures that the user is authorized to run scripts that require
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authorization.
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The C<$flagsrequired> argument specifies the required privileges
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the user must have if the username and password are correct.
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It should be specified as a reference-to-hash; keys in the hash
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should be the "flags" for the user, as specified in the Members
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intranet module. Any key specified must correspond to a "flag"
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in the userflags table. E.g., { circulate => 1 } would specify
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that the user must have the "circulate" privilege in order to
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proceed. To make sure that access control is correct, the
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C<$flagsrequired> parameter must be specified correctly.
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The C<$type> argument specifies whether the template should be
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retrieved from the opac or intranet directory tree. "opac" is
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assumed if it is not specified; however, if C<$type> is specified,
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"intranet" is assumed if it is not "opac".
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If C<$query> does not have a valid session ID associated with it
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(i.e., the user has not logged in) or if the session has expired,
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C<&checkauth> presents the user with a login page (from the point of
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view of the original script, C<&checkauth> does not return). Once the
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user has authenticated, C<&checkauth> restarts the original script
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(this time, C<&checkauth> returns).
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The login page is provided using a HTML::Template, which is set in the
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systempreferences table or at the top of this file. The variable C<$type>
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selects which template to use, either the opac or the intranet
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authentification template.
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C<&checkauth> returns a user ID, a cookie, and a session ID. The
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cookie should be sent back to the browser; it verifies that the user
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has authenticated.
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=cut
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sub checkauth {
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my $query = shift;
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# $authnotrequired will be set for scripts which will run without authentication
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my $authnotrequired = shift;
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my $flagsrequired = shift;
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my $type = shift;
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$type = 'opac' unless $type;
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my $dbh = C4::Context->dbh;
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my $timeout = C4::Context->preference('timeout');
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$timeout = 600 unless $timeout;
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my $template_name;
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if ( $type eq 'opac' ) {
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$template_name = "opac-auth.tmpl";
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}
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else {
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$template_name = "auth.tmpl";
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}
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# state variables
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my $loggedin = 0;
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my %info;
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my ( $userid, $cookie, $sessionID, $flags, $envcookie );
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my $logout = $query->param('logout.x');
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if ( $userid = $ENV{'REMOTE_USER'} ) {
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# Using Basic Authentication, no cookies required
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$cookie = $query->cookie(
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-name => 'sessionID',
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-value => '',
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-expires => ''
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);
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$loggedin = 1;
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}
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elsif ( $sessionID = $query->cookie('sessionID') ) {
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C4::Context->_new_userenv($sessionID);
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if ( my %hash = $query->cookie('userenv') ) {
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C4::Context::set_userenv(
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$hash{number}, $hash{id},
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$hash{cardnumber}, $hash{firstname},
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$hash{surname}, $hash{branch},
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$hash{branchname}, $hash{flags},
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$hash{emailaddress}, $hash{branchprinter}
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);
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}
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my ( $ip, $lasttime );
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( $userid, $ip, $lasttime ) =
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$dbh->selectrow_array(
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"SELECT userid,ip,lasttime FROM sessions WHERE sessionid=?",
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undef, $sessionID );
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if ($logout) {
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# voluntary logout the user
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$dbh->do( "DELETE FROM sessions WHERE sessionID=?",
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undef, $sessionID );
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C4::Context->_unset_userenv($sessionID);
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$sessionID = undef;
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$userid = undef;
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open L, ">>/tmp/sessionlog";
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my $time = localtime( time() );
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printf L "%20s from %16s logged out at %30s (manually).\n", $userid,
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$ip, $time;
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close L;
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}
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if ($userid) {
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if ( $lasttime < time() - $timeout ) {
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# timed logout
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$info{'timed_out'} = 1;
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$dbh->do( "DELETE FROM sessions WHERE sessionID=?",
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undef, $sessionID );
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C4::Context->_unset_userenv($sessionID);
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$userid = undef;
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$sessionID = undef;
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open L, ">>/tmp/sessionlog";
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my $time = localtime( time() );
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printf L "%20s from %16s logged out at %30s (inactivity).\n",
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$userid, $ip, $time;
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close L;
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}
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elsif ( $ip ne $ENV{'REMOTE_ADDR'} ) {
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# Different ip than originally logged in from
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$info{'oldip'} = $ip;
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$info{'newip'} = $ENV{'REMOTE_ADDR'};
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$info{'different_ip'} = 1;
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$dbh->do( "DELETE FROM sessions WHERE sessionID=?",
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undef, $sessionID );
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C4::Context->_unset_userenv($sessionID);
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$sessionID = undef;
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$userid = undef;
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open L, ">>/tmp/sessionlog";
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my $time = localtime( time() );
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printf L
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"%20s from logged out at %30s (ip changed from %16s to %16s).\n",
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$userid, $time, $ip, $info{'newip'};
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close L;
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}
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else {
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$cookie = $query->cookie(
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-name => 'sessionID',
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-value => $sessionID,
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-expires => ''
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);
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$dbh->do( "UPDATE sessions SET lasttime=? WHERE sessionID=?",
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undef, ( time(), $sessionID ) );
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$flags = haspermission( $dbh, $userid, $flagsrequired );
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if ($flags) {
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$loggedin = 1;
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}
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else {
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$info{'nopermission'} = 1;
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}
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}
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}
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}
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unless ($userid) {
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$sessionID = int( rand() * 100000 ) . '-' . time();
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$userid = $query->param('userid');
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C4::Context->_new_userenv($sessionID);
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my $password = $query->param('password');
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C4::Context->_new_userenv($sessionID);
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my ( $return, $cardnumber ) = checkpw( $dbh, $userid, $password );
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if ($return) {
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$dbh->do( "DELETE FROM sessions WHERE sessionID=? AND userid=?",
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undef, ( $sessionID, $userid ) );
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$dbh->do(
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"INSERT INTO sessions (sessionID, userid, ip,lasttime) VALUES (?, ?, ?, ?)",
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undef,
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( $sessionID, $userid, $ENV{'REMOTE_ADDR'}, time() )
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);
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open L, ">>/tmp/sessionlog";
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my $time = localtime( time() );
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printf L "%20s from %16s logged in at %30s.\n", $userid,
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$ENV{'REMOTE_ADDR'}, $time;
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close L;
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$cookie = $query->cookie(
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-name => 'sessionID',
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-value => $sessionID,
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-expires => ''
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);
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if ( $flags = haspermission( $dbh, $userid, $flagsrequired ) ) {
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$loggedin = 1;
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}
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else {
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$info{'nopermission'} = 1;
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C4::Context->_unset_userenv($sessionID);
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}
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if ( $return == 1 ) {
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my ( $bornum, $firstname, $surname, $userflags, $branchcode,
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$branchname, $branchprinter, $emailaddress );
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my $sth =
|
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$dbh->prepare(
|
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"select borrowernumber, firstname, surname, flags, borrowers.branchcode, branches.branchname as branchname,branches.branchprinter as branchprinter, email from borrowers left join branches on borrowers.branchcode=branches.branchcode where userid=?"
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);
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$sth->execute($userid);
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(
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$bornum, $firstname, $surname, $userflags, $branchcode,
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$branchname, $branchprinter, $emailaddress
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)
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= $sth->fetchrow
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if ( $sth->rows );
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# warn "$cardnumber,$bornum,$userid,$firstname,$surname,$userflags,$branchcode,$emailaddress";
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unless ( $sth->rows ) {
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my $sth =
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$dbh->prepare(
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"select borrowernumber, firstname, surname, flags, borrowers.branchcode, branches.branchname as branchname, branches.branchprinter as branchprinter, email from borrowers left join branches on borrowers.branchcode=branches.branchcode where cardnumber=?"
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);
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$sth->execute($cardnumber);
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(
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$bornum, $firstname, $surname, $userflags, $branchcode,
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$branchcode, $branchprinter, $emailaddress
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)
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= $sth->fetchrow
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if ( $sth->rows );
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# warn "$cardnumber,$bornum,$userid,$firstname,$surname,$userflags,$branchcode,$emailaddress";
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unless ( $sth->rows ) {
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$sth->execute($userid);
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(
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$bornum, $firstname, $surname, $userflags,
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$branchcode, $branchprinter, $emailaddress
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)
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= $sth->fetchrow
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if ( $sth->rows );
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}
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# warn "$cardnumber,$bornum,$userid,$firstname,$surname,$userflags,$branchcode,$emailaddress";
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}
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# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
|
|
# new op dev :
|
|
# launch a sequence to check if we have a ip for the branch, if we have one we replace the branchcode of the userenv by the branch bound in the ip.
|
|
my $ip = $ENV{'REMOTE_ADDR'};
|
|
my $branches = GetBranches('IS');
|
|
my @branchesloop;
|
|
my $branchprinter;
|
|
foreach my $br ( keys %$branches ) {
|
|
|
|
# now we work with the treatment of ip
|
|
my $domain = $branches->{$br}->{branchip};
|
|
if ( $domain && $ip =~ /^$domain/ ) {
|
|
$branchcode = $branches->{$br}->{'branchcode'};
|
|
|
|
# new op dev : add the branchprinter and branchname in the cookie
|
|
$branchprinter = $branches->{$br}->{'branchprinter'};
|
|
$branchname = $branches->{$br}->{'branchname'};
|
|
}
|
|
}
|
|
|
|
my $hash = C4::Context::set_userenv(
|
|
$bornum, $userid, $cardnumber,
|
|
$firstname, $surname, $branchcode,
|
|
$branchname, $userflags, $emailaddress,
|
|
$branchprinter,
|
|
);
|
|
|
|
$envcookie = $query->cookie(
|
|
-name => 'userenv',
|
|
-value => $hash,
|
|
-expires => ''
|
|
);
|
|
}
|
|
elsif ( $return == 2 ) {
|
|
|
|
#We suppose the user is the superlibrarian
|
|
my $hash = C4::Context::set_userenv(
|
|
0,
|
|
0,
|
|
C4::Context->config('user'),
|
|
C4::Context->config('user'),
|
|
C4::Context->config('user'),
|
|
"",
|
|
1,
|
|
C4::Context->preference('KohaAdminEmailAddress')
|
|
);
|
|
$envcookie = $query->cookie(
|
|
-name => 'userenv',
|
|
-value => $hash,
|
|
-expires => ''
|
|
);
|
|
}
|
|
}
|
|
else {
|
|
if ($userid) {
|
|
$info{'invalid_username_or_password'} = 1;
|
|
C4::Context->_unset_userenv($sessionID);
|
|
}
|
|
}
|
|
}
|
|
my $insecure = C4::Context->boolean_preference('insecure');
|
|
|
|
# finished authentification, now respond
|
|
if ( $loggedin || $authnotrequired || ( defined($insecure) && $insecure ) )
|
|
{
|
|
|
|
# successful login
|
|
unless ($cookie) {
|
|
$cookie = $query->cookie(
|
|
-name => 'sessionID',
|
|
-value => '',
|
|
-expires => ''
|
|
);
|
|
}
|
|
if ($envcookie) {
|
|
return ( $userid, [ $cookie, $envcookie ], $sessionID, $flags );
|
|
}
|
|
else {
|
|
return ( $userid, $cookie, $sessionID, $flags );
|
|
}
|
|
}
|
|
|
|
# else we have a problem...
|
|
# get the inputs from the incoming query
|
|
my @inputs = ();
|
|
foreach my $name ( param $query) {
|
|
(next) if ( $name eq 'userid' || $name eq 'password' );
|
|
my $value = $query->param($name);
|
|
push @inputs, { name => $name, value => $value };
|
|
}
|
|
|
|
my $template = gettemplate( $template_name, $type, $query );
|
|
$template->param(
|
|
INPUTS => \@inputs,
|
|
intranetcolorstylesheet =>
|
|
C4::Context->preference("intranetcolorstylesheet"),
|
|
intranetstylesheet => C4::Context->preference("intranetstylesheet"),
|
|
IntranetNav => C4::Context->preference("IntranetNav"),
|
|
TemplateEncoding => C4::Context->preference("TemplateEncoding"),
|
|
|
|
);
|
|
$template->param( loginprompt => 1 ) unless $info{'nopermission'};
|
|
|
|
my $self_url = $query->url( -absolute => 1 );
|
|
$template->param(
|
|
url => $self_url,
|
|
LibraryName => => C4::Context->preference("LibraryName"),
|
|
);
|
|
$template->param( \%info );
|
|
$cookie = $query->cookie(
|
|
-name => 'sessionID',
|
|
-value => $sessionID,
|
|
-expires => ''
|
|
);
|
|
print $query->header(
|
|
-type => guesstype( $template->output ),
|
|
-cookie => $cookie
|
|
),
|
|
$template->output;
|
|
exit;
|
|
}
|
|
|
|
sub checkpw {
|
|
|
|
my ( $dbh, $userid, $password ) = @_;
|
|
|
|
# INTERNAL AUTH
|
|
my $sth =
|
|
$dbh->prepare("select password,cardnumber from borrowers where userid=?");
|
|
$sth->execute($userid);
|
|
if ( $sth->rows ) {
|
|
my ( $md5password, $cardnumber ) = $sth->fetchrow;
|
|
if ( md5_base64($password) eq $md5password ) {
|
|
|
|
# C4::Context->set_userenv("$bornum",$userid,$cardnumber,$firstname,$surname,$branchcode,$userflags);
|
|
return 1, $cardnumber;
|
|
}
|
|
}
|
|
$sth = $dbh->prepare("select password from borrowers where cardnumber=?");
|
|
$sth->execute($userid);
|
|
if ( $sth->rows ) {
|
|
my ($md5password) = $sth->fetchrow;
|
|
if ( md5_base64($password) eq $md5password ) {
|
|
|
|
# C4::Context->set_userenv($bornum,$userid,$cardnumber,$firstname,$surname,$branchcode,$userflags);
|
|
return 1, $userid;
|
|
}
|
|
}
|
|
if ( $userid eq C4::Context->config('user')
|
|
&& $password eq C4::Context->config('pass') )
|
|
{
|
|
|
|
# Koha superuser account
|
|
# C4::Context->set_userenv(0,0,C4::Context->config('user'),C4::Context->config('user'),C4::Context->config('user'),"",1);
|
|
return 2;
|
|
}
|
|
if ( $userid eq 'demo'
|
|
&& $password eq 'demo'
|
|
&& C4::Context->config('demo') )
|
|
{
|
|
|
|
# DEMO => the demo user is allowed to do everything (if demo set to 1 in koha.conf
|
|
# some features won't be effective : modify systempref, modify MARC structure,
|
|
return 2;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
sub getuserflags {
|
|
my $cardnumber = shift;
|
|
my $dbh = shift;
|
|
my $userflags;
|
|
my $sth = $dbh->prepare("SELECT flags FROM borrowers WHERE cardnumber=?");
|
|
$sth->execute($cardnumber);
|
|
my ($flags) = $sth->fetchrow;
|
|
$flags = 0 unless $flags;
|
|
$sth = $dbh->prepare("SELECT bit, flag, defaulton FROM userflags");
|
|
$sth->execute;
|
|
|
|
while ( my ( $bit, $flag, $defaulton ) = $sth->fetchrow ) {
|
|
if ( ( $flags & ( 2**$bit ) ) || $defaulton ) {
|
|
$userflags->{$flag} = 1;
|
|
}
|
|
else {
|
|
$userflags->{$flag} = 0;
|
|
}
|
|
}
|
|
return $userflags;
|
|
}
|
|
|
|
sub haspermission {
|
|
my ( $dbh, $userid, $flagsrequired ) = @_;
|
|
my $sth = $dbh->prepare("SELECT cardnumber FROM borrowers WHERE userid=?");
|
|
$sth->execute($userid);
|
|
my ($cardnumber) = $sth->fetchrow;
|
|
($cardnumber) || ( $cardnumber = $userid );
|
|
my $flags = getuserflags( $cardnumber, $dbh );
|
|
my $configfile;
|
|
if ( $userid eq C4::Context->config('user') ) {
|
|
|
|
# Super User Account from /etc/koha.conf
|
|
$flags->{'superlibrarian'} = 1;
|
|
}
|
|
if ( $userid eq 'demo' && C4::Context->config('demo') ) {
|
|
|
|
# Demo user that can do "anything" (demo=1 in /etc/koha.conf)
|
|
$flags->{'superlibrarian'} = 1;
|
|
}
|
|
return $flags if $flags->{superlibrarian};
|
|
foreach ( keys %$flagsrequired ) {
|
|
return $flags if $flags->{$_};
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
sub getborrowernumber {
|
|
my ($userid) = @_;
|
|
my $dbh = C4::Context->dbh;
|
|
for my $field ( 'userid', 'cardnumber' ) {
|
|
my $sth =
|
|
$dbh->prepare("select borrowernumber from borrowers where $field=?");
|
|
$sth->execute($userid);
|
|
if ( $sth->rows ) {
|
|
my ($bnumber) = $sth->fetchrow;
|
|
return $bnumber;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
END { } # module clean-up code here (global destructor)
|
|
1;
|
|
__END__
|
|
|
|
=back
|
|
|
|
=head1 SEE ALSO
|
|
|
|
CGI(3)
|
|
|
|
C4::Output(3)
|
|
|
|
Digest::MD5(3)
|
|
|
|
=cut
|