instiki/vendor/plugins/HTML5lib/tests/test_sanitizer.rb

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#!/usr/bin/env ruby
require File.join(File.dirname(__FILE__), 'preamble')
require 'html5lib/html5parser'
require 'html5lib/liberalxmlparser'
require 'html5lib/treewalkers'
require 'html5lib/serializer'
require 'html5lib/sanitizer'
class SanitizeTest < Test::Unit::TestCase
include HTML5lib
def sanitize_xhtml stream
XHTMLParser.parseFragment(stream, :tokenizer => HTMLSanitizer).join('').gsub(/'/,'"')
end
def sanitize_html stream
HTMLParser.parseFragment(stream, :tokenizer => HTMLSanitizer).join('').gsub(/'/,'"')
end
def sanitize_rexml stream
require 'rexml/document'
doc = REXML::Document.new("<div xmlns=\"http://www.w3.org/1999/xhtml\">#{stream}</div>")
tokens = TreeWalkers.getTreeWalker('rexml').new(doc)
HTMLSerializer.serialize(tokens, {:encoding=>'utf-8',
:quote_attr_values => true,
:minimize_boolean_attributes => false,
:use_trailing_solidus => true,
:omit_optional_tags => false,
:inject_meta_charset => false,
:sanitize => true}).gsub(/^<div xmlns="http:\/\/www.w3.org\/1999\/xhtml">(.*)<\/div>$/, '\1')
end
HTMLSanitizer::ALLOWED_ELEMENTS.each do |tag_name|
next if %w[caption col colgroup optgroup option table tbody td tfoot th thead tr].include?(tag_name) ### TODO
define_method "test_should_allow_#{tag_name}_tag" do
if tag_name == 'image'
assert_equal "<img title=\"1\"/>foo &lt;bad&gt;bar&lt;/bad&gt; baz",
sanitize_html("<#{tag_name} title='1'>foo <bad>bar</bad> baz</#{tag_name}>")
elsif VOID_ELEMENTS.include?(tag_name)
assert_equal "<#{tag_name} title=\"1\"/>foo &lt;bad&gt;bar&lt;/bad&gt; baz",
sanitize_html("<#{tag_name} title='1'>foo <bad>bar</bad> baz</#{tag_name}>")
else
assert_equal "<#{tag_name.downcase} title=\"1\">foo &lt;bad&gt;bar&lt;/bad&gt; baz</#{tag_name.downcase}>",
sanitize_html("<#{tag_name} title='1'>foo <bad>bar</bad> baz</#{tag_name}>")
assert_equal "<#{tag_name} title=\"1\">foo &lt;bad&gt;bar&lt;/bad&gt; baz</#{tag_name}>",
sanitize_xhtml("<#{tag_name} title='1'>foo <bad>bar</bad> baz</#{tag_name}>")
assert_equal "<#{tag_name} title=\"1\">foo &lt;bad&gt;bar&lt;/bad&gt; baz</#{tag_name}>",
sanitize_rexml("<#{tag_name} title='1'>foo <bad>bar</bad> baz</#{tag_name}>")
end
end
end
HTMLSanitizer::ALLOWED_ELEMENTS.each do |tag_name|
define_method "test_should_forbid_#{tag_name.upcase}_tag" do
assert_equal "&lt;#{tag_name.upcase} title=\"1\"&gt;foo &lt;bad&gt;bar&lt;/bad&gt; baz&lt;/#{tag_name.upcase}&gt;",
sanitize_html("<#{tag_name.upcase} title='1'>foo <bad>bar</bad> baz</#{tag_name.upcase}>")
assert_equal "&lt;#{tag_name.upcase} title=\"1\"&gt;foo &lt;bad&gt;bar&lt;/bad&gt; baz&lt;/#{tag_name.upcase}&gt;",
sanitize_rexml("<#{tag_name.upcase} title='1'>foo <bad>bar</bad> baz</#{tag_name.upcase}>")
end
end
HTMLSanitizer::ALLOWED_ATTRIBUTES.each do |attribute_name|
next if attribute_name == 'style'
define_method "test_should_allow_#{attribute_name}_attribute" do
assert_equal "<p #{attribute_name.downcase}=\"foo\">foo &lt;bad&gt;bar&lt;/bad&gt; baz</p>",
sanitize_html("<p #{attribute_name}='foo'>foo <bad>bar</bad> baz</p>")
assert_equal "<p #{attribute_name}=\"foo\">foo &lt;bad&gt;bar&lt;/bad&gt; baz</p>",
sanitize_xhtml("<p #{attribute_name}='foo'>foo <bad>bar</bad> baz</p>")
assert_equal "<p #{attribute_name}=\"foo\">foo &lt;bad&gt;bar&lt;/bad&gt; baz</p>",
sanitize_rexml("<p #{attribute_name}='foo'>foo <bad>bar</bad> baz</p>")
end
end
HTMLSanitizer::ALLOWED_ATTRIBUTES.each do |attribute_name|
define_method "test_should_forbid_#{attribute_name.upcase}_attribute" do
assert_equal "<p>foo &lt;bad&gt;bar&lt;/bad&gt; baz</p>",
sanitize_html("<p #{attribute_name.upcase}='display: none;'>foo <bad>bar</bad> baz</p>")
assert_equal "<p>foo &lt;bad&gt;bar&lt;/bad&gt; baz</p>",
sanitize_rexml("<p #{attribute_name.upcase}='display: none;'>foo <bad>bar</bad> baz</p>")
end
end
HTMLSanitizer::ALLOWED_PROTOCOLS.each do |protocol|
define_method "test_should_allow_#{protocol}_uris" do
assert_equal "<a href=\"#{protocol}\">foo</a>",
sanitize_html(%(<a href="#{protocol}">foo</a>))
assert_equal "<a href=\"#{protocol}\">foo</a>",
sanitize_rexml(%(<a href="#{protocol}">foo</a>))
end
end
HTMLSanitizer::ALLOWED_PROTOCOLS.each do |protocol|
define_method "test_should_allow_uppercase_#{protocol}_uris" do
assert_equal "<a href=\"#{protocol.upcase}\">foo</a>",
sanitize_html(%(<a href="#{protocol.upcase}">foo</a>))
assert_equal "<a href=\"#{protocol.upcase}\">foo</a>",
sanitize_rexml(%(<a href="#{protocol.upcase}">foo</a>))
end
end
def test_should_allow_anchors
assert_equal "<a href=\"foo\">&lt;script&gt;baz&lt;/script&gt;</a>",
sanitize_html("<a href='foo' onclick='bar'><script>baz</script></a>")
assert_equal "<a href=\"foo\">&lt;script&gt;baz&lt;/script&gt;</a>",
sanitize_rexml("<a href='foo' onclick='bar'><script>baz</script></a>")
end
# RFC 3986, sec 4.2
def test_allow_colons_in_path_component
assert_equal "<a href=\"./this:that\">foo</a>",
sanitize_html("<a href=\"./this:that\">foo</a>")
assert_equal "<a href=\"./this:that\">foo</a>",
sanitize_rexml("<a href=\"./this:that\">foo</a>")
end
%w(src width height alt).each do |img_attr|
define_method "test_should_allow_image_#{img_attr}_attribute" do
assert_equal "<img #{img_attr}=\"foo\"/>",
sanitize_html("<img #{img_attr}='foo' onclick='bar' />")
assert_equal "<img #{img_attr}=\"foo\" />",
sanitize_rexml("<img #{img_attr}='foo' onclick='bar' />")
end
end
def test_should_handle_non_html
assert_equal 'abc', sanitize_html("abc")
assert_equal 'abc', sanitize_rexml("abc")
end
def test_should_handle_blank_text
assert_equal '', sanitize_html('')
assert_equal '', sanitize_rexml('')
end
[%w(img src), %w(a href)].each do |(tag, attr)|
close = VOID_ELEMENTS.include?(tag) ? "/>boo" : ">boo</#{tag}>"
xclose = VOID_ELEMENTS.include?(tag) ? " />" : ">boo</#{tag}>"
define_method "test_should_strip_#{attr}_attribute_in_#{tag}_with_bad_protocols" do
assert_equal %(<#{tag} title="1"#{close}), sanitize_html(%(<#{tag} #{attr}="javascript:XSS" title="1">boo</#{tag}>))
assert_equal %(<#{tag} title="1"#{xclose}), sanitize_rexml(%(<#{tag} #{attr}="javascript:XSS" title="1">boo</#{tag}>))
end
define_method "test_should_strip_#{attr}_attribute_in_#{tag}_with_bad_protocols_and_whitespace" do
assert_equal %(<#{tag} title="1"#{close}), sanitize_html(%(<#{tag} #{attr}=" javascript:XSS" title="1">boo</#{tag}>))
assert_equal %(<#{tag} title="1"#{xclose}), sanitize_rexml(%(<#{tag} #{attr}=" javascript:XSS" title="1">boo</#{tag}>))
end
end
[%(<img src="javascript:alert('XSS');" />),
%(<img src=javascript:alert('XSS') />),
%(<img src="JaVaScRiPt:alert('XSS')" />),
%(<img src='javascript:alert(&quot;XSS&quot;)' />),
%(<img src='javascript:alert(String.fromCharCode(88,83,83))' />),
%(<img src='&#106;&#97;&#118;&#97;&#115;&#99;&#114;&#105;&#112;&#116;&#58;&#97;&#108;&#101;&#114;&#116;&#40;&#39;&#88;&#83;&#83;&#39;&#41;' />),
%(<img src='&#0000106;&#0000097;&#0000118;&#0000097;&#0000115;&#0000099;&#0000114;&#0000105;&#0000112;&#0000116;&#0000058;&#0000097;&#0000108;&#0000101;&#0000114;&#0000116;&#0000040;&#0000039;&#0000088;&#0000083;&#0000083;&#0000039;&#0000041' />),
%(<img src='&#x6A;&#x61;&#x76;&#x61;&#x73;&#x63;&#x72;&#x69;&#x70;&#x74;&#x3A;&#x61;&#x6C;&#x65;&#x72;&#x74;&#x28;&#x27;&#x58;&#x53;&#x53;&#x27;&#x29' />),
%(<img src="jav\tascript:alert('XSS');" />),
%(<img src="jav&#x09;ascript:alert('XSS');" />),
%(<img src="jav&#x0A;ascript:alert('XSS');" />),
%(<img src="jav&#x0D;ascript:alert('XSS');" />),
%(<img src=" &#14; javascript:alert('XSS');" />),
%(<img src="&#x20;javascript:alert('XSS');" />),
%(<img src="&#xA0;javascript:alert('XSS');" />)].each_with_index do |img_hack, i|
define_method "test_should_not_fall_for_xss_image_hack_#{i}" do
assert_equal "<img/>", sanitize_html(img_hack)
end
end
def test_should_sanitize_tag_broken_up_by_null
assert_equal "&lt;scr\357\277\275ipt&gt;alert(\"XSS\")&lt;/scr\357\277\275ipt&gt;", sanitize_html(%(<scr\0ipt>alert(\"XSS\")</scr\0ipt>))
end
def test_should_sanitize_invalid_script_tag
assert_equal "&lt;script XSS=\"\" SRC=\"http://ha.ckers.org/xss.js\"&gt;&lt;/script&gt;", sanitize_html(%(<script/XSS SRC="http://ha.ckers.org/xss.js"></script>))
end
def test_should_sanitize_script_tag_with_multiple_open_brackets
assert_equal "&lt;&lt;script&gt;alert(\"XSS\");//&lt;&lt;/script&gt;", sanitize_html(%(<<script>alert("XSS");//<</script>))
assert_equal %(&lt;iframe src=\"http://ha.ckers.org/scriptlet.html\"&gt;&lt;), sanitize_html(%(<iframe src=http://ha.ckers.org/scriptlet.html\n<))
end
def test_should_sanitize_unclosed_script
assert_equal "&lt;script src=\"http://ha.ckers.org/xss.js?\"&gt;<b/>", sanitize_html(%(<script src=http://ha.ckers.org/xss.js?<b>))
end
def test_should_sanitize_half_open_scripts
assert_equal "<img/>", sanitize_html(%(<img src="javascript:alert('XSS')"))
end
def test_should_not_fall_for_ridiculous_hack
img_hack = %(<img\nsrc\n=\n"\nj\na\nv\na\ns\nc\nr\ni\np\nt\n:\na\nl\ne\nr\nt\n(\n'\nX\nS\nS\n'\n)\n"\n />)
assert_equal "<img/>", sanitize_html(img_hack)
assert_equal "<img />", sanitize_rexml(img_hack)
end
def test_platypus
assert_equal %(<a href=\"http://www.ragingplatypus.com/\" style=\"display: block; width: 100%; height: 100%; background-color: black; background-x: center; background-y: center;\">never trust your upstream platypus</a>),
sanitize_html(%(<a href="http://www.ragingplatypus.com/" style="display:block; position:absolute; left:0; top:0; width:100%; height:100%; z-index:1; background-color:black; background-image:url(http://www.ragingplatypus.com/i/cam-full.jpg); background-x:center; background-y:center; background-repeat:repeat;">never trust your upstream platypus</a>))
assert_equal %(<a href=\"http://www.ragingplatypus.com/\" style=\"display: block; width: 100%; height: 100%; background-color: black; background-x: center; background-y: center;\">never trust your upstream platypus</a>),
sanitize_rexml(%(<a href="http://www.ragingplatypus.com/" style="display:block; position:absolute; left:0; top:0; width:100%; height:100%; z-index:1; background-color:black; background-image:url(http://www.ragingplatypus.com/i/cam-full.jpg); background-x:center; background-y:center; background-repeat:repeat;">never trust your upstream platypus</a>))
end
def test_xul
assert_equal %(<p style="">fubar</p>),
sanitize_html(%(<p style="-moz-binding:url('http://ha.ckers.org/xssmoz.xml#xss')">fubar</p>))
assert_equal %(<p style="">fubar</p>),
sanitize_rexml(%(<p style="-moz-binding:url('http://ha.ckers.org/xssmoz.xml#xss')">fubar</p>))
end
def test_input_image
assert_equal %(<input type="image"/>),
sanitize_html(%(<input type="image" src="javascript:alert('XSS');" />))
assert_equal %(<input type="image" />),
sanitize_rexml(%(<input type="image" src="javascript:alert('XSS');" />))
end
def test_non_alpha_non_digit
assert_equal "&lt;script XSS=\"\" src=\"http://ha.ckers.org/xss.js\"&gt;&lt;/script&gt;",
sanitize_html(%(<script/XSS src="http://ha.ckers.org/xss.js"></script>))
assert_equal "<a>foo</a>",
sanitize_html('<a onclick!#$%&()*~+-_.,:;?@[/|\]^`=alert("XSS")>foo</a>')
assert_equal "<img src=\"http://ha.ckers.org/xss.js\"/>",
sanitize_html('<img/src="http://ha.ckers.org/xss.js"/>')
end
def test_img_dynsrc_lowsrc
assert_equal "<img/>",
sanitize_html(%(<img dynsrc="javascript:alert('XSS')" />))
assert_equal "<img />",
sanitize_rexml(%(<img dynsrc="javascript:alert('XSS')" />))
end
def test_div_background_image_unicode_encoded
assert_equal '<div style="">foo</div>',
sanitize_html(%(<div style="background-image:\0075\0072\006C\0028'\006a\0061\0076\0061\0073\0063\0072\0069\0070\0074\003a\0061\006c\0065\0072\0074\0028.1027\0058.1053\0053\0027\0029'\0029">foo</div>))
assert_equal '<div style="">foo</div>',
sanitize_rexml(%(<div style="background-image:\0075\0072\006C\0028'\006a\0061\0076\0061\0073\0063\0072\0069\0070\0074\003a\0061\006c\0065\0072\0074\0028.1027\0058.1053\0053\0027\0029'\0029">foo</div>))
end
def test_div_expression
assert_equal '<div style="">foo</div>',
sanitize_html(%(<div style="width: expression(alert('XSS'));">foo</div>))
assert_equal '<div style="">foo</div>',
sanitize_rexml(%(<div style="width: expression(alert('XSS'));">foo</div>))
end
def test_img_vbscript
assert_equal '<img/>',
sanitize_html(%(<img src='vbscript:msgbox("XSS")' />))
assert_equal '<img />',
sanitize_rexml(%(<img src='vbscript:msgbox("XSS")' />))
end
def test_should_handle_astral_plane_characters
assert_equal "<p>\360\235\222\265 \360\235\224\270</p>",
sanitize_html("<p>&#x1d4b5; &#x1d538;</p>")
assert_equal "<p>\360\235\222\265 \360\235\224\270</p>",
sanitize_rexml("<p>&#x1d4b5; &#x1d538;</p>")
end
end