diff --git a/lemonldap-ng-portal/MANIFEST b/lemonldap-ng-portal/MANIFEST
index 3698467af..5adc01827 100644
--- a/lemonldap-ng-portal/MANIFEST
+++ b/lemonldap-ng-portal/MANIFEST
@@ -62,6 +62,7 @@ lib/Lemonldap/NG/Portal/IssuerDBNull.pm
 lib/Lemonldap/NG/Portal/IssuerDBOpenID.pm
 lib/Lemonldap/NG/Portal/IssuerDBOpenIDConnect.pm
 lib/Lemonldap/NG/Portal/IssuerDBSAML.pm
+lib/Lemonldap/NG/Portal/Lib/CAS.pm
 lib/Lemonldap/NG/Portal/Lib/Choice.pm
 lib/Lemonldap/NG/Portal/Lib/DBI.pm
 lib/Lemonldap/NG/Portal/Lib/LDAP.pm
diff --git a/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Lib/CAS.pm b/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Lib/CAS.pm
new file mode 100644
index 000000000..acfd112bb
--- /dev/null
+++ b/lemonldap-ng-portal/lib/Lemonldap/NG/Portal/Lib/CAS.pm
@@ -0,0 +1,375 @@
+package Lemonldap::NG::Portal::Lib::CAS;
+
+use strict;
+use Mouse;
+
+use Lemonldap::NG::Portal::Main::Constants qw(
+  PE_OK
+  PE_SENDRESPONSE
+);
+
+our $VERSION = '2.0.0';
+
+# PROPERTIES
+
+# return LWP::UserAgent object
+has ua => (
+    is      => 'rw',
+    lazy    => 1,
+    builder => sub {
+
+        # TODO : LWP options to use a proxy for example
+        my $ua = LWP::UserAgent->new();
+        push @{ $ua->requests_redirectable }, 'POST';
+        $ua->env_proxy();
+        return $ua;
+    }
+);
+
+# INITIALIZATION
+
+sub init {
+    my ($self) = @_;
+}
+
+sub sendSoapResponse {
+    my ( $self, $req, $s ) = @_;
+    $req->response(
+        [
+            200,
+            [
+                'Content-Length' => length($s)
+            ],
+            [$s]
+        ]
+    );
+    return PE_SENDRESPONSE;
+}
+
+# Try to recover the CAS session corresponding to id and return session datas
+# If id is set to undef, return a new session
+sub getCasSession {
+    my ( $self, $id ) = @_;
+
+    my $casSession = Lemonldap::NG::Common::Session->new(
+        {
+            storageModule        => $self->conf->{casStorage},
+            storageModuleOptions => $self->conf->{casStorageOptions},
+            cacheModule          => $self->conf->{localSessionStorage},
+            cacheModuleOptions   => $self->conf->{localSessionStorageOptions},
+            id                   => $id,
+            kind                 => "CAS",
+        }
+    );
+
+    if ( $casSession->error ) {
+        if ($id) {
+            $self->p->userInfo("CAS session $id isn't yet available");
+        }
+        else {
+            $self->lmLog( "Unable to create new CAS session", 'error' );
+            $self->lmLog( $casSession->error,                 'error' );
+        }
+        return undef;
+    }
+
+    return $casSession;
+}
+
+# Return an error for CAS VALIDATE request
+sub returnCasValidateError {
+    my ( $self, $req ) = @_;
+
+    $self->lmLog( "Return CAS validate error", 'debug' );
+
+    $req->response( [ 200, [ 'Content-Length' => 4 ], ["no\n\n"] ] );
+    return PE_SENDRESPONSE;
+}
+
+# Return success for CAS VALIDATE request
+sub returnCasValidateSuccess {
+    my ( $self, $req, $username ) = @_;
+
+    $self->lmLog( "Return CAS validate success with username $username",
+        'debug' );
+
+    return $self->sendSoapResponse( $req, "yes\n$username\n" );
+}
+
+# Return an error for CAS SERVICE VALIDATE request
+sub returnCasServiceValidateError {
+    my ( $self, $req, $code, $text ) = @_;
+
+    $code ||= 'INTERNAL_ERROR';
+    $text ||= 'No description provided';
+
+    $self->lmLog( "Return CAS service validate error $code ($text)", 'debug' );
+
+    return $self->sendSoapResponse(
+        $req, "<cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
+\t<cas:authenticationFailure code=\"$code\">
+\t\t$text
+\t</cas:authenticationFailure>
+</cas:serviceResponse>\n"
+    );
+}
+
+# Return success for CAS SERVICE VALIDATE request
+sub returnCasServiceValidateSuccess {
+    my ( $self, $req, $username, $pgtIou, $proxies, $attributes ) = @_;
+
+    $self->lmLog( "Return CAS service validate success with username $username",
+        'debug' );
+
+    my $s = "<cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas
+\t<cas:authenticationSuccess>
+\t\t<cas:user>$username</cas:user>\n";
+    if ( defined $attributes ) {
+        $s .= "\t\t<cas:attributes>\n";
+        foreach my $attribute ( keys %$attributes ) {
+            foreach my $value (
+                split(
+                    $self->{multiValuesSeparator},
+                    $attributes->{$attribute}
+                )
+              )
+            {
+                $s .= "\t\t\t<cas:$attribute>$value</cas:$attribute>\n";
+            }
+        }
+        $s .= "\t\t</cas:attributes>\n";
+    }
+    if ( defined $pgtIou ) {
+        $self->lmLog( "Add proxy granting ticket $pgtIou in response",
+            'debug' );
+        $s .=
+          "\t\t<cas:proxyGrantingTicket>$pgtIou</cas:proxyGrantingTicket>\n";
+    }
+    if ($proxies) {
+        $self->lmLog( "Add proxies $proxies in response", 'debug' );
+        $s .= "\t\t<cas:proxies>\n\t\t\t<cas:proxy>$_</cas:proxy>\n"
+          foreach ( split( /$self->{multiValuesSeparator}/, $proxies ) );
+        $s .= "\t\t</cas:proxies>\n";
+    }
+    $s .= "\t</cas:authenticationSuccess>\n</cas:serviceResponse>\n";
+
+    return $self->sendSoapResponse( $req, $s );
+}
+
+# Return an error for CAS PROXY request
+sub returnCasProxyError {
+    my ( $self, $req, $code, $text ) = @_;
+
+    $code ||= 'INTERNAL_ERROR';
+    $text ||= 'No description provided';
+
+    $self->lmLog( "Return CAS proxy error $code ($text)", 'debug' );
+
+    return $self->sendSoapResponse(
+        $req, "<cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
+\t<cas:proxyFailure code=\"$code\">
+\t\t$text
+\t</cas:proxyFailure>
+</cas:serviceResponse>\n"
+    );
+}
+
+# Return success for CAS PROXY request
+sub returnCasProxySuccess {
+    my ( $self, $req, $ticket ) = @_;
+
+    $self->lmLog( "Return CAS proxy success with ticket $ticket", 'debug' );
+
+    return $self->sendSoapResponse(
+        $req, "<cas:serviceResponse xmlns:cas='http://www.yale.edu/tp/cas'>
+\t<cas:proxySuccess>
+\t\t<cas:proxyTicket>$ticket</cas:proxyTicket>
+\t</cas:proxySuccess>
+</cas:serviceResponse>\n"
+    );
+}
+
+# Find and delete CAS sessions bounded to a primary session
+sub deleteCasSecondarySessions {
+    my ( $self, $session_id ) = @_;
+    my $result = 1;
+
+    # Find CAS sessions
+    my $moduleOptions = $self->conf->{casStorageOptions} || {};
+    $moduleOptions->{backend} = $self->conf->{casStorage};
+    my $module = "Lemonldap::NG::Common::Apache::Session";
+
+    my $cas_sessions =
+      $module->searchOn( $moduleOptions, "_cas_id", $session_id );
+
+    if ( my @cas_sessions_keys = keys %$cas_sessions ) {
+
+        foreach my $cas_session (@cas_sessions_keys) {
+
+            # Get session
+            $self->lmLog( "Retrieve CAS session $cas_session", 'debug' );
+
+            my $casSession = $self->getCasSession($cas_session);
+
+            # Delete session
+            $result = $self->deleteCasSession($casSession);
+        }
+    }
+    else {
+        $self->lmLog( "No CAS session found for session $session_id ",
+            'debug' );
+    }
+
+    return $result;
+
+}
+
+# Delete an opened CAS session
+sub deleteCasSession {
+    my ( $self, $session ) = @_;
+
+    # Check session object
+    unless ( $session && $session->data ) {
+        $self->lmLog( "No session to delete", 'error' );
+        return 0;
+    }
+
+    # Get session_id
+    my $session_id = $session->id;
+
+    # Delete session
+    unless ( $session->remove ) {
+        $self->lmLog( $session->error, 'error' );
+        return 0;
+    }
+
+    $self->lmLog( "CAS session $session_id deleted", 'debug' );
+
+    return 1;
+}
+
+# Call proxy granting URL on CAS client
+sub callPgtUrl {
+    my ( $self, $pgtUrl, $pgtIou, $pgtId ) = @_;
+
+    # Build URL
+    my $url =
+      $pgtUrl . ( $pgtUrl =~ /\?/ ? '&' : '?' ) . "pgtIou=$pgtIou&pgtId=$pgtId";
+
+    $self->lmLog( "Call URL $url", 'debug' );
+
+    # GET URL
+    my $response = $self->ua->get($url);
+
+    # Return result
+    return $response->is_success();
+}
+
+1;
+__END__
+
+=head1 NAME
+
+=encoding utf8
+
+Lemonldap::NG::Portal::_CAS - Common CAS functions
+
+=head1 SYNOPSIS
+
+use Lemonldap::NG::Portal::_CAS;
+
+=head1 DESCRIPTION
+
+This module contains common methods for CAS
+
+=head1 METHODS
+
+=head2 getCasSession
+
+Try to recover the CAS session corresponding to id and return session datas
+If id is set to undef, return a new session
+
+=head2 returnCasValidateError
+
+Return an error for CAS VALIDATE request
+
+=head2 returnCasValidateSuccess
+
+Return success for CAS VALIDATE request
+
+=head2 deleteCasSecondarySessions
+
+Find and delete CAS sessions bounded to a primary session
+
+=head2 returnCasServiceValidateError
+
+Return an error for CAS SERVICE VALIDATE request
+
+=head2 returnCasServiceValidateSuccess
+
+Return success for CAS SERVICE VALIDATE request
+
+=head2 returnCasProxyError
+
+Return an error for CAS PROXY request
+
+=head2 returnCasProxySuccess
+
+Return success for CAS PROXY request
+
+=head2 deleteCasSession
+
+Delete an opened CAS session
+
+=head2 callPgtUrl
+
+Call proxy granting URL on CAS client
+
+=head1 SEE ALSO
+
+L<Lemonldap::NG::Portal::IssuerDBCAS>
+
+=head1 AUTHOR
+
+=over
+
+=item Clement Oudot, E<lt>clem.oudot@gmail.comE<gt>
+
+=item Xavier Guimard, E<lt>x.guimard@free.frE<gt>
+
+=back
+
+=head1 BUG REPORT
+
+Use OW2 system to report bug or ask for features:
+L<http://jira.ow2.org>
+
+=head1 DOWNLOAD
+
+Lemonldap::NG is available at
+L<http://forge.objectweb.org/project/showfiles.php?group_id=274>
+
+=head1 COPYRIGHT AND LICENSE
+
+=over
+
+=item Copyright (C) 2010-2012 by Clement Oudot, E<lt>clem.oudot@gmail.comE<gt>
+
+=item Copyright (C) 2016 by Xavier Guimard, E<lt>x.guimard@free.frE<gt>
+
+=back
+
+This library is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see L<http://www.gnu.org/licenses/>.
+
+=cut