From 6aa54daa3eb9634298319bf793a3e7e3d92e285d Mon Sep 17 00:00:00 2001
From: Kyle M Hall <kyle@bywatersolutions.com>
Date: Thu, 27 Jul 2023 07:45:57 -0400
Subject: [PATCH] Bug 30524: (QA follow-up) Only generate CSRF token if it will
 be used

This patch avoids generating CSRF tokens unless the csrf-token.inc file
is included in the template.

Passed token doesn't need HTML escaped. The docs for WWW::CSRF state:
  The returned CSRF token is in a text-only form suitable for inserting into a HTML form without further escaping (assuming you did not send in strange things to the Time option).

Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit ddf1eb6cef14da365675890920ff72f010c59527)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
---
 C4/Auth.pm                                    |  1 -
 Koha/Template/Plugin/Koha.pm                  | 27 +++++++++++++++++++
 .../prog/en/includes/csrf-token.inc           |  4 ++-
 3 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/C4/Auth.pm b/C4/Auth.pm
index 3e4cf15195..cf21e3bdc4 100644
--- a/C4/Auth.pm
+++ b/C4/Auth.pm
@@ -308,7 +308,6 @@ sub get_template_and_user {
         $template->param( loggedinusernumber => $borrowernumber ); # FIXME Should be replaced with logged_in_user.borrowernumber
         $template->param( logged_in_user     => $patron );
         $template->param( sessionID          => $sessionID );
-        $template->param( csrf_token => Koha::Token->new->generate_csrf({ session_id => scalar $sessionID }));
 
         if ( $in->{'type'} eq 'opac' ) {
             require Koha::Virtualshelves;
diff --git a/Koha/Template/Plugin/Koha.pm b/Koha/Template/Plugin/Koha.pm
index 5e7a303f70..ec5f975eb7 100644
--- a/Koha/Template/Plugin/Koha.pm
+++ b/Koha/Template/Plugin/Koha.pm
@@ -22,6 +22,7 @@ use Modern::Perl;
 use base qw( Template::Plugin );
 
 use C4::Context;
+use Koha::Token;
 use Koha;
 
 =head1 NAME
@@ -48,8 +49,22 @@ is necessary.
 
 =head2 Class Methods
 
+=head3 new
+
+This new method allows us to store the context which gives us
+access to the template vars already set. In particular this gives
+us access to the template vars set by C4::Auth::get_template_and_user
+
 =cut
 
+sub new {
+    my ( $class, $context ) = @_;
+    bless {
+        _CONTEXT => $context,
+    }, $class;
+}
+
+
 sub Preference {
     my ( $self, $pref ) = @_;
     return C4::Context->preference( $pref );
@@ -84,4 +99,16 @@ sub Version {
     };
 }
 
+=head3 GenerateCSRF
+
+Generate a new CSRF token.
+
+=cut
+
+sub GenerateCSRF {
+    my ($self) = @_;
+    my $session_id = $self->{_CONTEXT}->stash->{sessionID};
+    return Koha::Token->new->generate_csrf( { session_id => scalar $session_id } );
+}
+
 1;
diff --git a/koha-tmpl/intranet-tmpl/prog/en/includes/csrf-token.inc b/koha-tmpl/intranet-tmpl/prog/en/includes/csrf-token.inc
index 703d4eb036..bfc221faf4 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/includes/csrf-token.inc
+++ b/koha-tmpl/intranet-tmpl/prog/en/includes/csrf-token.inc
@@ -1 +1,3 @@
-<input type="hidden" name="csrf_token" value="[% csrf_token | html %]" />
+[%- USE Koha %]
+[%- USE raw %]
+<input type="hidden" name="csrf_token" value="[% Koha.GenerateCSRF | $raw %]" />
-- 
2.39.2