2f9e6aa623
Global CAS options allows the admistrator to set the session attribute that gets exported to all CAS application as the main identifier (cas:user) This commit adds the ability to override this configuration for a particular CAS application. OIDC already allows this Fixes #1713
776 lines
24 KiB
Perl
776 lines
24 KiB
Perl
package Lemonldap::NG::Portal::Issuer::CAS;
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use strict;
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use Mouse;
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use URI;
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use Lemonldap::NG::Common::FormEncode;
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use Lemonldap::NG::Portal::Main::Constants qw(
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PE_CAS_SERVICE_NOT_ALLOWED
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PE_CONFIRM
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PE_ERROR
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PE_LOGOUT_OK
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PE_OK
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PE_SENDRESPONSE
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);
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our $VERSION = '2.0.3';
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extends 'Lemonldap::NG::Portal::Main::Issuer',
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'Lemonldap::NG::Portal::Lib::CAS';
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# INITIALIZATION
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use constant beforeAuth => 'storeEnvAndCheckGateway';
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use constant sessionKind => 'ICAS';
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has rule => ( is => 'rw' );
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sub init {
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my ($self) = @_;
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# Parse activation rule
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my $hd = $self->p->HANDLER;
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$self->logger->debug( "CAS rule -> " . $self->conf->{issuerDBCASRule} );
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my $rule =
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$hd->buildSub( $hd->substitute( $self->conf->{issuerDBCASRule} ) );
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unless ($rule) {
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$self->error( "Bad CAS rule -> " . $hd->tsv->{jail}->error );
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return 0;
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}
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$self->{rule} = $rule;
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# Launch parents initialization subroutines, then launch IdP and SP lists
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my $res = $self->Lemonldap::NG::Portal::Main::Issuer::init();
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return 0 unless ( $self->loadApp );
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$self->addUnauthRoute(
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( $self->path ) => {
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serviceValidate => 'serviceValidate',
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validate => 'validate',
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proxyValidate => 'proxyValidate',
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proxy => 'proxy',
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p3 => {
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serviceValidate => 'serviceValidate',
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proxyValidate => 'proxyValidate'
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}
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},
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['GET']
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);
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return $res;
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}
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# RUNNING METHODS
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sub storeEnvAndCheckGateway {
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my ( $self, $req ) = @_;
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my $service = $self->p->getHiddenFormValue( $req, 'service' )
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|| $req->param('service');
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my $gateway = $self->p->getHiddenFormValue( $req, 'gateway' )
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|| $req->param('gateway');
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if ( $gateway and $gateway eq "true" ) {
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$self->logger->debug(
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"Gateway mode requested, redirect without authentication");
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$req->response( [ 302, [ Location => $service ], [] ] );
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$req->pdata( {} );
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return PE_SENDRESPONSE;
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}
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if ( $service and $service =~ m#^(https?://[^/]+)(/.*)?$# ) {
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my ( $host, $uri ) = ( $1, $2 );
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my $app = $self->casAppList->{$host};
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if ($app) {
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$req->env->{llng_cas_app} = $app;
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}
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}
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return PE_OK;
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}
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# Main method (launched only for authenticated users, see Main/Issuer)
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sub run {
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my ( $self, $req, $target ) = @_;
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# Check activation rule
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unless ( $self->rule->( $req, $req->sessionInfo ) ) {
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$self->userLogger->error('CAS service not authorized');
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return PE_CAS_SERVICE_NOT_ALLOWED;
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}
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# CAS URL
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my $cas_login = 'login';
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my $cas_logout = 'logout';
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my $cas_validate = 'validate';
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my $cas_serviceValidate = 'serviceValidate';
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my $cas_p3_serviceValidate = 'p3/serviceValidate';
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my $cas_proxyValidate = 'proxyValidate';
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my $cas_p3_proxyValidate = 'p3/proxyValidate';
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my $cas_proxy = 'proxy';
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# Called URL
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my $url = $req->uri();
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# Session ID
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my $session_id = $req->{sessionInfo}->{_session_id} || $req->{id};
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# Session creation timestamp
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my $time = $req->{sessionInfo}->{_utime} || time();
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# 1. LOGIN
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if ( $target eq $cas_login ) {
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$self->logger->debug("URL $url detected as an CAS LOGIN URL");
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# GET parameters
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my $service = $self->p->getHiddenFormValue( $req, 'service' )
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|| $req->param('service');
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my $renew = $self->p->getHiddenFormValue( $req, 'renew' )
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|| $req->param('renew');
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my $gateway = $self->p->getHiddenFormValue( $req, 'gateway' )
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|| $req->param('gateway');
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my $casServiceTicket;
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# Renew
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if ( $renew
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and $renew eq 'true'
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and time - $req->sessionInfo->{_utime} >
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$self->conf->{portalForceAuthnInterval} )
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{
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# Authentication must be replayed
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$self->logger->debug("Authentication renew requested");
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$self->{updateSession} = 1;
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$req->env->{QUERY_STRING} =~ s/renew=true/renew=false/;
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return $self->reAuth($req);
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}
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# If no service defined, exit
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unless ( defined $service ) {
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$self->logger->debug("No service defined in CAS URL");
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return PE_OK;
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}
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unless ( $service =~ m#^(https?://[^/]+)(/.*)?$# ) {
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$self->logger->error("Bad service $service");
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return PE_ERROR;
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}
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my ( $host, $uri ) = ( $1, $2 );
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my $app = $self->casAppList->{$host};
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# Check access on the service
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my $casAccessControlPolicy = $self->conf->{casAccessControlPolicy};
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if ( $casAccessControlPolicy =~ /^(error|faketicket)$/i ) {
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$self->logger->debug(
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"CAS access control requested on service $service");
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unless ($app) {
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$self->userLogger->error('CAS service not configured');
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return PE_CAS_SERVICE_NOT_ALLOWED;
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}
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if ( my $rule = $self->spRules->{$app} ) {
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if ( $rule->( $req, $req->sessionInfo ) ) {
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$self->logger->debug("CAS service $service access allowed");
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}
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else {
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$self->userLogger->error(
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"CAS service $service access not allowed");
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if ( $casAccessControlPolicy =~ /^(error)$/i ) {
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$self->logger->debug(
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"Return error instead of redirecting user on CAS service"
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);
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return PE_CAS_SERVICE_NOT_ALLOWED;
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}
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else {
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$self->logger->debug(
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"Redirect user on CAS service with a fake ticket");
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$casServiceTicket = "ST-F4K3T1CK3T";
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}
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}
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}
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}
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unless ($casServiceTicket) {
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# Check last authentication time to decide if
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# the authentication is recent or not
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my $casRenewFlag = 0;
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my $last_authn_utime = $req->{sessionInfo}->{_lastAuthnUTime} || 0;
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if (
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time() - $last_authn_utime <
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$self->conf->{portalForceAuthnInterval} )
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{
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$self->logger->debug(
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"Authentication is recent, will set CAS renew flag to true"
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);
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$casRenewFlag = 1;
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}
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# Create a service ticket
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$self->logger->debug(
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"Create a CAS service ticket for service $service");
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my $Sinfos;
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$Sinfos->{type} = 'casService';
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$Sinfos->{service} = $service;
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$Sinfos->{renew} = $casRenewFlag;
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$Sinfos->{_cas_id} = $session_id;
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$Sinfos->{_utime} = $time;
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$Sinfos->{_casApp} = $app;
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my $casServiceSession = $self->getCasSession( undef, $Sinfos );
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unless ($casServiceSession) {
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$self->logger->error("Unable to create CAS session");
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return PE_ERROR;
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}
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my $casServiceSessionID = $casServiceSession->id;
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$casServiceTicket = "ST-" . $casServiceSessionID;
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$self->logger->debug(
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"CAS service session $casServiceSessionID created");
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}
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# Redirect to service
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my $service_url = $service;
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$service_url .= ( $service =~ /\?/ ? '&' : '?' )
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. build_urlencoded( ticket => $casServiceTicket );
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$self->logger->debug("Redirect user to $service_url");
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$req->{urldc} = $service_url;
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$req->steps( [] );
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return PE_OK;
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}
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# 2. LOGOUT
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if ( $target eq $cas_logout ) {
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$self->logger->debug("URL $url detected as an CAS LOGOUT URL");
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# Disable Content-Security-Policy header since logout can be embedded
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# in a frame
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$req->frame(1);
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# GET parameters
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my $logout_url = $req->param('url'); # CAS 2.0
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my $logout_service = $req->param('service'); # CAS 3.0
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# Delete linked CAS sessions
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$self->deleteCasSecondarySessions($session_id);
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# Delete local session
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if ( my $session = $self->p->getApacheSession($session_id) ) {
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unless ( $self->p->_deleteSession( $req, $session ) ) {
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$self->logger->error("Fail to delete session $session_id ");
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}
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if ($logout_url) {
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# Display a link to the provided URL
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$self->logger->debug(
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"Logout URL $logout_url will be displayed");
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$req->info(
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$self->loadTemplate(
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'casBack2Url', params => { url => $logout_url }
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)
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);
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$req->data->{activeTimer} = 0;
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return PE_CONFIRM;
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}
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if ($logout_service) {
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$self->logger->debug(
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"User will be redirected to $logout_service");
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$req->{urldc} = $logout_service;
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$req->steps( [] );
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return PE_OK;
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}
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}
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else {
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$self->logger->info("Unknown session $session_id");
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}
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return PE_LOGOUT_OK;
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}
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# 3. VALIDATE [CAS 1.0]
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if ( $target eq $cas_validate ) {
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$self->logger->debug("URL $url detected as an CAS VALIDATE URL");
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# This URL must not be called by authenticated users
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$self->userLogger->info(
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"CAS VALIDATE URL called by authenticated user, ignore it");
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return PE_OK;
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}
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# 4. SERVICE VALIDATE [CAS 2.0]
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if ( $target eq $cas_serviceValidate
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|| $target eq $cas_p3_serviceValidate )
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{
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$self->logger->debug(
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"URL $url detected as an CAS SERVICE VALIDATE URL");
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# This URL must not be called by authenticated users
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$self->userLogger->info(
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"CAS SERVICE VALIDATE URL called by authenticated user, ignore it");
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return PE_OK;
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}
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# 5. PROXY VALIDATE [CAS 2.0]
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if ( $target eq $cas_proxyValidate || $target eq $cas_p3_proxyValidate ) {
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$self->logger->debug("URL $url detected as an CAS PROXY VALIDATE URL");
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# This URL must not be called by authenticated users
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$self->userLogger->info(
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"CAS PROXY VALIDATE URL called by authenticated user, ignore it");
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return PE_OK;
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}
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# 6. PROXY [CAS 2.0]
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if ( $target eq $cas_proxy ) {
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$self->logger->debug("URL $url detected as an CAS PROXY URL");
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# This URL must not be called by authenticated users
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$self->userLogger->info(
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"CAS PROXY URL called by authenticated user, ignore it");
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return PE_OK;
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}
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return PE_OK;
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}
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sub logout {
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my ( $self, $req ) = @_;
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# Session ID
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my $session_id = $req->{sessionInfo}->{_session_id} || $req->{id};
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# Delete linked CAS sessions
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$self->deleteCasSecondarySessions($session_id) if ($session_id);
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return PE_OK;
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}
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# Direct request from SP to IdP
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sub validate {
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my ( $self, $req ) = @_;
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$self->logger->debug(
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'URL ' . $req->uri . ' detected as an CAS VALIDATE URL' );
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# GET parameters
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my $service = $req->param('service');
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my $ticket = $req->param('ticket');
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my $renew = $req->param('renew');
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# Required parameters: service and ticket
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unless ( $service and $ticket ) {
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$self->logger->error("Service and Ticket parameters required");
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return $self->returnCasValidateError();
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}
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$self->logger->debug(
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"Get validate request with ticket $ticket for service $service");
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unless ( $ticket =~ s/^ST-// ) {
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$self->logger->error("Provided ticket is not a service ticket (ST)");
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return $self->returnCasValidateError();
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}
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my $casServiceSession = $self->getCasSession($ticket);
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unless ($casServiceSession) {
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$self->logger->error("Service ticket session $ticket not found");
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return $self->returnCasValidateError();
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}
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$self->logger->debug("Service ticket session $ticket found");
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my $service1_uri = URI->new($service);
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my $service2_uri = URI->new( $casServiceSession->data->{service} );
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# Check service
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unless ( $service1_uri->eq($service2_uri) ) {
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# Tolerate that relative URI are the same
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if ( $service1_uri->rel($service2_uri) eq "./"
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or $service2_uri->rel($service1_uri) eq "./" )
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{
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$self->logger->notice(
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"Submitted service $service1_uri does not exactly match initial service "
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. $service2_uri
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. ' but difference is tolerated.' );
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}
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else {
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$self->logger->error(
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"Submitted service $service does not match initial service "
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. $casServiceSession->data->{service} );
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$self->deleteCasSession($casServiceSession);
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return $self->returnCasValidateError();
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}
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}
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else {
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$self->logger->debug("Submitted service $service math initial servce");
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}
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# Check renew
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if ( $renew and $renew eq 'true' ) {
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# We should check the ST was delivered with primary credentials
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$self->logger->debug("Renew flag detected ");
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unless ( $casServiceSession->data->{renew} ) {
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$self->logger->error(
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"Authentication renew requested, but not done in former authentication process"
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);
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$self->deleteCasSession($casServiceSession);
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return $self->returnCasValidateError();
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}
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}
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# Open local session
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my $localSession =
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$self->p->getApacheSession( $casServiceSession->data->{_cas_id} );
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unless ($localSession) {
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$self->logger->warn( "Local session "
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. $casServiceSession->data->{_cas_id}
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. " notfound" );
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$self->deleteCasSession($casServiceSession);
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return $self->returnCasValidateError();
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}
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# Get username
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my $app = $casServiceSession->data->{_casApp};
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my $username_attribute =
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( $app
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and $self->conf->{casAppMetaDataOptions}->{$app}
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->{casAppMetaDataOptionsUserAttribute} )
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? $self->conf->{casAppMetaDataOptions}->{$app}
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->{casAppMetaDataOptionsUserAttribute}
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: ( $self->conf->{casAttr}
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|| $self->conf->{whatToTrace} );
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my $username = $localSession->data->{$username_attribute};
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$self->logger->debug("Get username $username");
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# Return success message
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$self->deleteCasSession($casServiceSession);
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return $self->returnCasValidateSuccess( $req, $username );
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}
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sub proxy {
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my ( $self, $req ) = @_;
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$self->logger->debug(
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'URL ' . $req->uri . " detected as an CAS PROXY URL" );
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# GET parameters
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my $pgt = $req->param('pgt');
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my $targetService = $req->param('targetService');
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# Required parameters: pgt and targetService
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unless ( $pgt and $targetService ) {
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$self->logger->error("Pgt and TargetService parameters required");
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$self->returnCasProxyError( $req, 'INVALID_REQUEST',
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'Missing mandatory parameters (pgt, targetService)' );
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}
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$self->logger->debug(
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"Get proxy request with ticket $pgt for service $targetService");
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# Get CAS session corresponding to ticket
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unless ( $pgt =~ s/^PGT-// ) {
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$self->logger->error(
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"Provided ticket is not a proxy granting ticket (PGT)");
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$self->returnCasProxyError( $req, 'BAD_PGT',
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'Provided ticket is not a proxy granting ticket' );
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}
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my $casProxyGrantingSession = $self->getCasSession($pgt);
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unless ($casProxyGrantingSession) {
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$self->logger->error("Proxy granting ticket session $pgt not found");
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$self->returnCasProxyError( $req, 'BAD_PGT', 'Ticket not found' );
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}
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$self->logger->debug("Proxy granting session $pgt found");
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# Create a proxy ticket
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$self->logger->debug(
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"Create a CAS proxy ticket for service $targetService");
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my $casProxySession = $self->getCasSession();
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unless ($casProxySession) {
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$self->logger->error("Unable to create CAS proxy session");
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$self->returnCasProxyError( $req, 'INTERNAL_ERROR',
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'Error in proxy session management' );
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}
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my $Pinfos;
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$Pinfos->{type} = 'casProxy';
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$Pinfos->{service} = $targetService;
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$Pinfos->{_cas_id} = $casProxyGrantingSession->data->{_cas_id};
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$Pinfos->{_utime} = $casProxyGrantingSession->data->{_utime};
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$Pinfos->{proxies} = $casProxyGrantingSession->data->{proxies};
|
|
|
|
$casProxySession->update($Pinfos);
|
|
|
|
my $casProxySessionID = $casProxySession->id;
|
|
my $casProxyTicket = "PT-" . $casProxySessionID;
|
|
|
|
$self->logger->debug("CAS proxy session $casProxySessionID created");
|
|
|
|
return $self->returnCasProxySuccess( $req, $casProxyTicket );
|
|
}
|
|
|
|
sub serviceValidate {
|
|
my ( $self, $req ) = @_;
|
|
return $self->_validate2( 'SERVICE', $req );
|
|
}
|
|
|
|
sub proxyValidate {
|
|
my ( $self, $req ) = @_;
|
|
return $self->_validate2( 'PROXY', $req );
|
|
}
|
|
|
|
# INTERNAL METHODS
|
|
|
|
sub _validate2 {
|
|
my ( $self, $urlType, $req ) = @_;
|
|
$self->logger->debug(
|
|
'URL ' . $req->uri . " detected as an CAS $urlType VALIDATE URL" );
|
|
|
|
# GET parameters
|
|
my $service = $req->param('service');
|
|
my $ticket = $req->param('ticket');
|
|
my $pgtUrl = $req->param('pgtUrl');
|
|
my $renew = $req->param('renew') // 'false';
|
|
|
|
# PGTIOU
|
|
my $casProxyGrantingTicketIOU;
|
|
|
|
# Required parameters: service and ticket
|
|
unless ( $service and $ticket ) {
|
|
$self->logger->error("Service and Ticket parameters required");
|
|
return $self->returnCasServiceValidateError( $req, 'INVALID_REQUEST',
|
|
'Missing mandatory parameters (service, ticket)' );
|
|
}
|
|
|
|
$self->logger->debug( "Get "
|
|
. lc($urlType)
|
|
. " validate request with ticket $ticket for service $service" );
|
|
|
|
# Get CAS session corresponding to ticket
|
|
if ( $urlType eq 'SERVICE' and !( $ticket =~ s/^ST-// ) ) {
|
|
$self->logger->error("Provided ticket is not a service ticket (ST)");
|
|
return $self->returnCasServiceValidateError( $req, 'INVALID_TICKET',
|
|
'Provided ticket is not a service ticket' );
|
|
}
|
|
elsif ( $urlType eq 'PROXY' and !( $ticket =~ s/^(P|S)T-// ) ) {
|
|
$self->userLogger->error(
|
|
"Provided ticket is not a service or proxy ticket ($1T)");
|
|
return $self->returnCasServiceValidateError( $req, 'INVALID_TICKET',
|
|
'Provided ticket is not a service or proxy ticket' );
|
|
}
|
|
|
|
my $casServiceSession = $self->getCasSession($ticket);
|
|
|
|
unless ($casServiceSession) {
|
|
$self->logger->error("$urlType ticket session $ticket not found");
|
|
return $self->returnCasServiceValidateError( $req, 'INVALID_TICKET',
|
|
'Ticket not found' );
|
|
}
|
|
my $app = $casServiceSession->data->{_casApp};
|
|
|
|
$self->logger->debug("$urlType ticket session $ticket found");
|
|
|
|
my $service1_uri = URI->new($service);
|
|
my $service2_uri = URI->new( $casServiceSession->data->{service} );
|
|
|
|
# Check service
|
|
unless ( $service1_uri->eq($service2_uri) ) {
|
|
|
|
# Tolerate that relative URI are the same
|
|
if ( $service1_uri->rel($service2_uri) eq "./"
|
|
or $service2_uri->rel($service1_uri) eq "./" )
|
|
{
|
|
$self->logger->notice(
|
|
"Submitted service $service1_uri does not exactly match initial service "
|
|
. $service2_uri
|
|
. ' but difference is tolerated.' );
|
|
}
|
|
else {
|
|
$self->userLogger->error(
|
|
"Submitted service $service does not match initial service "
|
|
. $casServiceSession->data->{service} );
|
|
$self->deleteCasSession($casServiceSession);
|
|
return $self->returnCasServiceValidateError( $req,
|
|
'INVALID_SERVICE',
|
|
'Submitted service does not match initial service' );
|
|
}
|
|
}
|
|
else {
|
|
$self->logger->debug(
|
|
"Submitted service $service match initial service");
|
|
}
|
|
|
|
# Check renew
|
|
if ( $renew and $renew eq 'true' ) {
|
|
|
|
# We should check the ST was delivered with primary credentials
|
|
$self->logger->debug("Renew flag detected ");
|
|
|
|
unless ( $casServiceSession->data->{renew} ) {
|
|
$self->logger->error(
|
|
"Authentication renew requested, but not done in former authentication process"
|
|
);
|
|
$self->deleteCasSession($casServiceSession);
|
|
return $self->returnCasValidateError();
|
|
}
|
|
|
|
}
|
|
|
|
# Proxies (for PROXY VALIDATE only)
|
|
my $proxies = $casServiceSession->data->{proxies};
|
|
|
|
# Proxy granting ticket
|
|
if ($pgtUrl) {
|
|
|
|
# Create a proxy granting ticket
|
|
$self->logger->debug(
|
|
"Create a CAS proxy granting ticket for service $service");
|
|
|
|
my $PGinfos;
|
|
|
|
# PGT session
|
|
$PGinfos->{type} = 'casProxyGranting';
|
|
$PGinfos->{service} = $service;
|
|
$PGinfos->{_cas_id} = $casServiceSession->data->{_cas_id};
|
|
$PGinfos->{_utime} = $casServiceSession->data->{_utime};
|
|
$PGinfos->{_casApp} = $app;
|
|
|
|
# Trace proxies
|
|
$PGinfos->{proxies} = (
|
|
$proxies
|
|
? $proxies . $self->conf->{multiValuesSeparator} . $pgtUrl
|
|
: $pgtUrl
|
|
);
|
|
|
|
my $casProxyGrantingSession = $self->getCasSession( undef, $PGinfos );
|
|
|
|
if ($casProxyGrantingSession) {
|
|
|
|
my $casProxyGrantingSessionID = $casProxyGrantingSession->id;
|
|
my $casProxyGrantingTicket = "PGT-" . $casProxyGrantingSessionID;
|
|
|
|
$self->logger->debug(
|
|
"CAS proxy granting session $casProxyGrantingSessionID created"
|
|
);
|
|
|
|
# Generate the proxy granting ticket IOU
|
|
my $tmpCasSession = $self->getCasSession();
|
|
|
|
if ($tmpCasSession) {
|
|
|
|
$casProxyGrantingTicketIOU = "PGTIOU-" . $tmpCasSession->id;
|
|
$self->deleteCasSession($tmpCasSession);
|
|
$self->logger->debug(
|
|
"Generate proxy granting ticket IOU $casProxyGrantingTicketIOU"
|
|
);
|
|
|
|
# Request pgtUrl
|
|
if (
|
|
$self->callPgtUrl(
|
|
$pgtUrl, $casProxyGrantingTicketIOU,
|
|
$casProxyGrantingTicket
|
|
)
|
|
)
|
|
{
|
|
$self->logger->debug(
|
|
"Proxy granting URL $pgtUrl called with success");
|
|
}
|
|
else {
|
|
$self->logger->error(
|
|
"Error calling proxy granting URL $pgtUrl");
|
|
$casProxyGrantingTicketIOU = undef;
|
|
}
|
|
}
|
|
|
|
}
|
|
else {
|
|
$self->logger->warn(
|
|
"Error in proxy granting ticket management, bypass it");
|
|
}
|
|
}
|
|
|
|
# Open local session
|
|
my $localSession =
|
|
$self->p->getApacheSession( $casServiceSession->data->{_cas_id} );
|
|
|
|
unless ($localSession) {
|
|
$self->userLogger->error( "Local session "
|
|
. $casServiceSession->data->{_cas_id}
|
|
. " notfound" );
|
|
$self->deleteCasSession($casServiceSession);
|
|
return $self->returnCasServiceValidateError( $req, 'INTERNAL_ERROR',
|
|
'No session associated to ticket' );
|
|
}
|
|
|
|
# Get username
|
|
my $username_attribute =
|
|
( $app
|
|
and $self->conf->{casAppMetaDataOptions}->{$app}
|
|
->{casAppMetaDataOptionsUserAttribute} )
|
|
? $self->conf->{casAppMetaDataOptions}->{$app}
|
|
->{casAppMetaDataOptionsUserAttribute}
|
|
: ( $self->conf->{casAttr}
|
|
|| $self->conf->{whatToTrace} );
|
|
|
|
my $username = $localSession->data->{$username_attribute};
|
|
|
|
$self->logger->debug("Get username $username");
|
|
|
|
# Get attributes [CAS 3.0]
|
|
my $attributes = {};
|
|
my $ev =
|
|
( $app and $self->conf->{casAppMetaDataExportedVars}->{$app} )
|
|
? $self->conf->{casAppMetaDataExportedVars}->{$app}
|
|
: {};
|
|
unless (%$ev) {
|
|
$ev = $self->conf->{casAttributes} || {};
|
|
}
|
|
|
|
foreach my $casAttribute ( keys %$ev ) {
|
|
my $localSessionValue = $localSession->data->{ $ev->{$casAttribute} };
|
|
$attributes->{$casAttribute} = $localSessionValue
|
|
if defined $localSessionValue;
|
|
}
|
|
|
|
# Return success message
|
|
$self->deleteCasSession($casServiceSession);
|
|
return $self->returnCasServiceValidateSuccess( $req, $username,
|
|
$casProxyGrantingTicketIOU, $proxies, $attributes );
|
|
}
|
|
|
|
1;
|