X-Git-Url: https://sipb.mit.edu/gitweb.cgi/ikiwiki.git/blobdiff_plain/a7be7bdf56b60a08a7ae23a17e20d2bad4cc2971..43c647edd31c224e0ca07785ef1ac7e856639c09:/IkiWiki/Plugin/htmlscrubber.pm

diff --git a/IkiWiki/Plugin/htmlscrubber.pm b/IkiWiki/Plugin/htmlscrubber.pm
index e02a8591e..3bdaccea1 100644
--- a/IkiWiki/Plugin/htmlscrubber.pm
+++ b/IkiWiki/Plugin/htmlscrubber.pm
@@ -5,23 +5,17 @@ use warnings;
 use strict;
 use IkiWiki 2.00;
 
+# This regexp matches urls that are in a known safe scheme.
+# Feel free to use it from other plugins.
+our $safe_url_regexp;
+
 sub import { #{{{
 	hook(type => "sanitize", id => "htmlscrubber", call => \&sanitize);
-} # }}}
-
-sub sanitize (@) { #{{{
-	my %params=@_;
-	return scrubber()->scrub($params{content});
-} # }}}
 
-my $_scrubber;
-sub scrubber { #{{{
-	return $_scrubber if defined $_scrubber;
-	
 	# Only known uri schemes are allowed to avoid all the ways of
 	# embedding javascrpt.
 	# List at http://en.wikipedia.org/wiki/URI_scheme
-	my $uri_schemes=join("|",
+	my $uri_schemes=join("|", map quotemeta,
 		# IANA registered schemes
 		"http", "https", "ftp", "mailto", "file", "telnet", "gopher",
 		"aaa", "aaas", "acap", 	"cap", "cid", "crid", 
@@ -33,11 +27,21 @@ sub scrubber { #{{{
 		"aim", "callto", "cvs", "ed2k", "feed", "fish", "gg",
 		"irc", "ircs", "lastfm", "ldaps", "magnet", "mms",
 		"msnim", "notes", "rsync", "secondlife", "skype", "ssh",
-		"sftp", "sms", "steam", "webcal", "ymsgr",
+		"sftp", "smb", "sms", "snews", "webcal", "ymsgr",
 	);
 	# data is a special case. Allow data:image/*, but
 	# disallow data:text/javascript and everything else.
-	my $link=qr/^(?:$uri_schemes:|data:image\/|[^:]+$)/i;
+	$safe_url_regexp=qr/^(?:(?:$uri_schemes):|data:image\/|[^:]+(?:$|\/))/i;
+} # }}}
+
+sub sanitize (@) { #{{{
+	my %params=@_;
+	return scrubber()->scrub($params{content});
+} # }}}
+
+my $_scrubber;
+sub scrubber { #{{{
+	return $_scrubber if defined $_scrubber;
 
 	eval q{use HTML::Scrubber};
 	error($@) if $@;
@@ -58,24 +62,27 @@ sub scrubber { #{{{
 			map { $_ => 1 } qw{
 				abbr accept accept-charset accesskey
 				align alt axis border cellpadding cellspacing
-				char charoff charset checked cite class
+				char charoff charset checked class
 				clear cols colspan color compact coords
 				datetime dir disabled enctype for frame
 				headers height hreflang hspace id ismap
-				label lang longdesc maxlength media method
+				label lang maxlength media method
 				multiple name nohref noshade nowrap prompt
 				readonly rel rev rows rowspan rules scope
 				selected shape size span start summary
-				tabindex target title type usemap valign
+				tabindex target title type valign
 				value vspace width
 				autoplay loopstart loopend end
 				playcount controls 
 			} ),
 			"/" => 1, # emit proper <hr /> XHTML
-			href => $link,
-			src => $link,
-			action => $link,
-			poster => $link,
+			href => $safe_url_regexp,
+			src => $safe_url_regexp,
+			action => $safe_url_regexp,
+			cite => $safe_url_regexp,
+			longdesc => $safe_url_regexp,
+			poster => $safe_url_regexp,
+			usemap => $safe_url_regexp,
 		}],
 	);
 	return $_scrubber;