X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/0f67e7d96953535e98d9ec26c30a25b8aaad782c..885e4b607ae6cdcd48c792ce45c8b7faa29a76fb:/IkiWiki/CGI.pm

diff --git a/IkiWiki/CGI.pm b/IkiWiki/CGI.pm
index dac522eea..81cb42d13 100644
--- a/IkiWiki/CGI.pm
+++ b/IkiWiki/CGI.pm
@@ -9,7 +9,7 @@ use IkiWiki::UserInfo;
 use open qw{:utf8 :std};
 use Encode;
 
-sub printheader ($) { #{{{
+sub printheader ($) {
 	my $session=shift;
 	
 	if ($config{sslcookie}) {
@@ -19,9 +19,9 @@ sub printheader ($) { #{{{
 		print $session->header(-charset => 'utf-8',
 			-cookie => $session->cookie(-httponly => 1));
 	}
-} #}}}
+}
 
-sub showform ($$$$;@) { #{{{
+sub showform ($$$$;@) {
 	my $form=shift;
 	my $buttons=shift;
 	my $session=shift;
@@ -38,7 +38,7 @@ sub showform ($$$$;@) { #{{{
 	print misctemplate($form->title, $form->render(submit => $buttons), @_);
 }
 
-sub redirect ($$) { #{{{
+sub redirect ($$) {
 	my $q=shift;
 	my $url=shift;
 	if (! $config{w3mmode}) {
@@ -48,9 +48,9 @@ sub redirect ($$) { #{{{
 		print "Content-type: text/plain\n";
 		print "W3m-control: GOTO $url\n\n";
 	}
-} #}}}
+}
 
-sub decode_cgi_utf8 ($) { #{{{
+sub decode_cgi_utf8 ($) {
 	# decode_form_utf8 method is needed for 5.10
 	if ($] < 5.01) {
 		my $cgi = shift;
@@ -58,9 +58,9 @@ sub decode_cgi_utf8 ($) { #{{{
 			$cgi->param($f, map { decode_utf8 $_ } $cgi->param($f));
 		}
 	}
-} #}}}
+}
 
-sub decode_form_utf8 ($) { #{{{
+sub decode_form_utf8 ($) {
 	if ($] >= 5.01) {
 		my $form = shift;
 		foreach my $f ($form->field) {
@@ -70,11 +70,11 @@ sub decode_form_utf8 ($) { #{{{
 			);
 		}
 	}
-} #}}}
+}
 
 # Check if the user is signed in. If not, redirect to the signin form and
 # save their place to return to later.
-sub needsignin ($$) { #{{{
+sub needsignin ($$) {
 	my $q=shift;
 	my $session=shift;
 
@@ -85,9 +85,9 @@ sub needsignin ($$) { #{{{
 		cgi_savesession($session);
 		exit;
 	}
-} #}}}	
+}
 
-sub cgi_signin ($$) { #{{{
+sub cgi_signin ($$) {
 	my $q=shift;
 	my $session=shift;
 
@@ -127,9 +127,9 @@ sub cgi_signin ($$) { #{{{
 	}
 
 	showform($form, $buttons, $session, $q);
-} #}}}
+}
 
-sub cgi_postsignin ($$) { #{{{
+sub cgi_postsignin ($$) {
 	my $q=shift;
 	my $session=shift;
 	
@@ -144,9 +144,9 @@ sub cgi_postsignin ($$) { #{{{
 	else {
 		error(gettext("login failed, perhaps you need to turn on cookies?"));
 	}
-} #}}}
+}
 
-sub cgi_prefs ($$) { #{{{
+sub cgi_prefs ($$) {
 	my $q=shift;
 	my $session=shift;
 
@@ -254,9 +254,9 @@ sub cgi_prefs ($$) { #{{{
 	}
 	
 	showform($form, $buttons, $session, $q);
-} #}}}
+}
 
-sub check_banned ($$) { #{{{
+sub check_banned ($$) {
 	my $q=shift;
 	my $session=shift;
 
@@ -275,12 +275,12 @@ sub check_banned ($$) { #{{{
 	}
 }
 
-sub cgi_getsession ($) { #{{{
+sub cgi_getsession ($) {
 	my $q=shift;
 
-	eval q{use CGI::Session};
+	eval q{use CGI::Session; use HTML::Entities};
 	error($@) if $@;
-	CGI::Session->name("ikiwiki_session_".encode_utf8($config{wikiname}));
+	CGI::Session->name("ikiwiki_session_".encode_entities($config{wikiname}));
 	
 	my $oldmask=umask(077);
 	my $session = eval {
@@ -294,18 +294,34 @@ sub cgi_getsession ($) { #{{{
 	umask($oldmask);
 
 	return $session;
-} #}}}
+}
 
-sub cgi_savesession ($) { #{{{
+# To guard against CSRF, the user's session id (sid)
+# can be stored on a form. This function will check
+# (for logged in users) that the sid on the form matches
+# the session id in the cookie.
+sub checksessionexpiry ($$) {
+	my $q=shift;
+	my $session = shift;
+
+	if (defined $session->param("name")) {
+		my $sid=$q->param('sid');
+		if (! defined $sid || $sid ne $session->id) {
+			error(gettext("Your login session has expired."));
+		}
+	}
+}
+
+sub cgi_savesession ($) {
 	my $session=shift;
 
 	# Force session flush with safe umask.
 	my $oldmask=umask(077);
 	$session->flush;
 	umask($oldmask);
-} #}}}
+}
 
-sub cgi (;$$) { #{{{
+sub cgi (;$$) {
 	my $q=shift;
 	my $session=shift;
 
@@ -375,16 +391,16 @@ sub cgi (;$$) { #{{{
 	else {
 		error("unknown do parameter");
 	}
-} #}}}
+}
 
 # Does not need to be called directly; all errors will go through here.
-sub cgierror ($) { #{{{
+sub cgierror ($) {
 	my $message=shift;
 
 	print "Content-type: text/html\n\n";
 	print misctemplate(gettext("Error"),
 		"<p class=\"error\">".gettext("Error").": $message</p>");
 	die $@;
-} #}}}
+}
 
 1