use a separate bad_request page for CSRF errors

lib/Travelynx/Controller/Account.pm

@@ -247,8 +247,9 @@ sub do_login {
 
 	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
 		$self->render(
-			'login',
+			'bad_request',
-			invalid => 'csrf',
+			csrf   => 1,
+			status => 400
 		);
 	}
 	else {
@@ -288,8 +289,9 @@ sub register {
 
 	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
 		$self->render(
-			'register',
+			'bad_request',
-			invalid => 'csrf',
+			csrf   => 1,
+			status => 400
 		);
 		return;
 	}
@@ -345,8 +347,9 @@ sub register {
 		# a human user should take at least five seconds to fill out the form.
 		# Throw a CSRF error at presumed spammers.
 		$self->render(
-			'register',
+			'bad_request',
-			invalid => 'csrf',
+			csrf   => 1,
+			status => 400
 		);
 		return;
 	}
@@ -408,8 +411,11 @@ sub delete {
 	my ($self) = @_;
 	my $uid = $self->current_user->{id};
 	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
-		$self->flash( invalid => 'csrf' );
+		$self->render(
-		$self->redirect_to('account');
+			'bad_request',
+			csrf   => 1,
+			status => 400
+		);
 		return;
 	}
 
@@ -436,7 +442,11 @@ sub delete {
 sub do_logout {
 	my ($self) = @_;
 	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
-		$self->render( 'login', invalid => 'csrf' );
+		$self->render(
+			'bad_request',
+			csrf   => 1,
+			status => 400
+		);
 		return;
 	}
 	$self->logout;
@@ -503,8 +513,9 @@ sub social {
 	if ( $self->param('action') and $self->param('action') eq 'save' ) {
 		if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
 			$self->render(
-				'social',
+				'bad_request',
-				invalid => 'csrf',
+				csrf   => 1,
+				status => 400
 			);
 			return;
 		}
@@ -724,8 +735,9 @@ sub profile {
 	if ( $self->param('action') and $self->param('action') eq 'save' ) {
 		if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
 			$self->render(
-				'edit_profile',
+				'bad_request',
-				invalid => 'csrf',
+				csrf   => 1,
+				status => 400
 			);
 			return;
 		}
@@ -908,8 +920,9 @@ sub change_mail {
 	if ( $action and $action eq 'update_mail' ) {
 		if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
 			$self->render(
-				'change_mail',
+				'bad_request',
-				invalid => 'csrf',
+				csrf   => 1,
+				status => 400
 			);
 			return;
 		}
@@ -967,9 +980,9 @@ sub change_name {
 	if ( $action and $action eq 'update_name' ) {
 		if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
 			$self->render(
-				'change_name',
+				'bad_request',
-				name    => $old_name,
+				csrf   => 1,
-				invalid => 'csrf',
+				status => 400
 			);
 			return;
 		}
@@ -1033,7 +1046,11 @@ sub change_password {
 	my $password2    = $self->req->param('newpw2');
 
 	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
-		$self->render( 'change_password', invalid => 'csrf' );
+		$self->render(
+			'bad_request',
+			csrf   => 1,
+			status => 400
+		);
 		return;
 	}
 
@@ -1074,7 +1091,11 @@ sub request_password_reset {
 
 	if ( $self->param('action') and $self->param('action') eq 'initiate' ) {
 		if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
-			$self->render( 'recover_password', invalid => 'csrf' );
+			$self->render(
+				'bad_request',
+				csrf   => 1,
+				status => 400
+			);
 			return;
 		}
 
@@ -1131,7 +1152,11 @@ sub request_password_reset {
 		my $password2 = $self->param('newpw2');
 
 		if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
-			$self->render( 'set_password', invalid => 'csrf' );
+			$self->render(
+				'bad_request',
+				csrf   => 1,
+				status => 400
+			);
 			return;
 		}
 		if (

lib/Travelynx/Controller/Api.pm

@@ -567,7 +567,11 @@ sub import_v1 {
 sub set_token {
 	my ($self) = @_;
 	if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
-		$self->render( 'account', invalid => 'csrf' );
+		$self->render(
+			'bad_request',
+			csrf   => 1,
+			status => 400
+		);
 		return;
 	}
 	my $token    = make_token();

lib/Travelynx/Controller/Traewelling.pm

@@ -15,8 +15,9 @@ sub settings {
 		and $self->validation->csrf_protect->has_error('csrf_token') )
 	{
 		$self->render(
-			'traewelling',
+			'bad_request',
-			invalid => 'csrf',
+			csrf   => 1,
+			status => 400
 		);
 		return;
 	}

lib/Travelynx/Controller/Traveling.pm

@@ -1529,10 +1529,9 @@ sub visibility_form {
 	if ( $action eq 'save' ) {
 		if ( $self->validation->csrf_protect->has_error('csrf_token') ) {
 			$self->render(
-				'edit_visibility',
+				'bad_request',
-				error      => 'csrf',
+				csrf   => 1,
-				user_level => $user_level,
+				status => 400
-				journey    => {}
 			);
 		}
 		elsif ( $dep_ts and $dep_ts != $status->{sched_departure}->epoch ) {

templates/_invalid_input.html.ep

@@ -2,14 +2,7 @@
 	<div class="col s12">
 		<div class="card caution-color">
 			<div class="card-content white-text">
-				% if ($invalid eq 'csrf') {
+				% if ($invalid eq 'credentials') {
-					<span class="card-title">Ungültiger CSRF-Token</span>
-					<p>Sind Cookies aktiviert? Ansonsten könnte es sich um einen
-					Fall von <a
-					href="https://de.wikipedia.org/wiki/Cross-Site-Request-Forgery">CSRF</a>
-					handeln.</p>
-				% }
-				% elsif ($invalid eq 'credentials') {
 					<span class="card-title">Ungültige Logindaten</span>
 					<p>Falscher Account oder falsches Passwort.</p>
 				% }

templates/bad_request.html.ep

@@ -0,0 +1,19 @@
+<div class="row">
+	<div class="col s12">
+		<div class="card caution-color">
+			<div class="card-content white-text">
+				<span class="card-title">400 Bad Request</span>
+				% if (stash('csrf')) {
+					<p>Ungültiger CSRF-Token. Dieser dient zum Schutz vor Cross-Site Request Forgery.</p>
+					<p>Falls du von einer externen Seite hierhin geleitet wurdest, wurde möglicherweise (erfolglos) versucht, deinen Account anzugreifen. Falls du von travelynx selbst aus hier angekommen bist, kann es sich um eine fehlerhafte Cookie-Konfiguration im Browser, eine abgelaufene Session (→ bitte nochmal versuchen) oder du einen Bug in travelynx handeln (→ bitte melden).</p>
+				% }
+				% elsif (my $m = stash('message')) {
+					<p><%= $m %></p>
+				% }
+				% else {
+					<p>Diese Anfrage ist ungültig. Ursache kann z.B. eine abgelaufene Session oder ein Bug in travelynx sein.</p>
+				% }
+			</div>
+		</div>
+	</div>
+</div>