+require 'test/unit'
+require File.expand_path(File.join(File.dirname(__FILE__), '../../../../config/environment.rb'))
+
+class WhiteListTest < Test::Unit::TestCase
+ include WhiteListHelper
+ public :contains_bad_protocols?
+
+ WhiteListHelper.tags.each do |tag_name|
+ define_method "test_should_allow_#{tag_name}_tag" do
+ assert_white_listed "start <#{tag_name} title=\"1\" name=\"foo\">foo <bad>bar</bad> baz</#{tag_name}> end", %(start <#{tag_name} title="1">foo <bad>bar</bad> baz</#{tag_name}> end)
+ end
+ end
+
+ def test_should_allow_anchors
+ assert_white_listed %(<a href="foo" onclick="bar"><script>baz</script></a>), %(<a href="foo"></a>)
+ end
+
+ %w(src width height alt).each do |img_attr|
+ define_method "test_should_allow_image_#{img_attr}_attribute" do
+ assert_white_listed %(<img #{img_attr}="foo" onclick="bar" />), %(<img #{img_attr}="foo" />)
+ end
+ end
+
+ def test_should_handle_non_html
+ assert_white_listed 'abc'
+ end
+
+ def test_should_handle_blank_text
+ assert_white_listed nil
+ assert_white_listed ''
+ end
+
+ def test_should_allow_custom_tags
+ text = "<u>foo</u>"
+ assert_equal(text, white_list(text, :tags => %w(u)))
+ end
+
+ def test_should_allow_custom_tags_with_attributes
+ text = %(<fieldset foo="bar">foo</fieldset>)
+ assert_equal(text, white_list(text, :attributes => ['foo']))
+ end
+
+ [%w(img src), %w(a href)].each do |(tag, attr)|
+ define_method "test_should_strip_#{attr}_attribute_in_#{tag}_with_bad_protocols" do
+ assert_white_listed %(<#{tag} #{attr}="javascript:bang" title="1">boo</#{tag}>), %(<#{tag} title="1">boo</#{tag}>)
+ end
+ end
+
+ def test_should_flag_bad_protocols
+ %w(about chrome data disk hcp help javascript livescript lynxcgi lynxexec ms-help ms-its mhtml mocha opera res resource shell vbscript view-source vnd.ms.radio wysiwyg).each do |proto|
+ assert contains_bad_protocols?("#{proto}://bad")
+ end
+ end
+
+ def test_should_accept_good_protocols
+ WhiteListHelper.protocols.each do |proto|
+ assert !contains_bad_protocols?("#{proto}://good")
+ end
+ end
+
+ def test_should_reject_hex_codes_in_protocol
+ assert contains_bad_protocols?("%6A%61%76%61%73%63%72%69%70%74%3A%61%6C%65%72%74%28%22%58%53%53%22%29")
+ assert_white_listed %(<a href="%6A%61%76%61%73%63%72%69%70%74%3A%61%6C%65%72%74%28%22%58%53%53%22%29">1</a>), "<a>1</a>"
+ end
+
+ def test_should_block_script_tag
+ assert_white_listed %(<SCRIPT\nSRC=http://ha.ckers.org/xss.js></SCRIPT>), ""
+ end
+
+ [%(<IMG SRC="javascript:alert('XSS');">),
+ %(<IMG SRC=javascript:alert('XSS')>),
+ %(<IMG SRC=JaVaScRiPt:alert('XSS')>),
+ %(<IMG """><SCRIPT>alert("XSS")</SCRIPT>">),
+ %(<IMG SRC=javascript:alert("XSS")>),
+ %(<IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>),
+ %(<IMG SRC=javascript:alert('XSS')>),
+ %(<IMG SRC=javascript:alert('XSS')>),
+ %(<IMG SRC=javascript:alert('XSS')>),
+ %(<IMG SRC="jav\tascript:alert('XSS');">),
+ %(<IMG SRC="jav	ascript:alert('XSS');">),
+ %(<IMG SRC="jav
ascript:alert('XSS');">),
+ %(<IMG SRC="jav
ascript:alert('XSS');">),
+ %(<IMG SRC="  javascript:alert('XSS');">),
+ %(<IMG SRC=`javascript:alert("RSnake says, 'XSS'")`>)].each_with_index do |img_hack, i|
+ define_method "test_should_not_fall_for_xss_image_hack_#{i}" do
+ assert_white_listed img_hack, "<img>"
+ end
+ end
+
+ def test_should_sanitize_tag_broken_up_by_null
+ assert_white_listed %(<SCR\0IPT>alert(\"XSS\")</SCR\0IPT>), "<scr>alert(\"XSS\")</scr>"
+ end
+
+ def test_should_sanitize_invalid_script_tag
+ assert_white_listed %(<SCRIPT/XSS SRC="http://ha.ckers.org/xss.js"></SCRIPT>), ""
+ end
+
+ def test_should_sanitize_script_tag_with_multiple_open_brackets
+ assert_white_listed %(<<SCRIPT>alert("XSS");//<</SCRIPT>), "<"
+ assert_white_listed %(<iframe src=http://ha.ckers.org/scriptlet.html\n<), %(<iframe src="http:" /><)
+ end
+
+ def test_should_sanitize_unclosed_script
+ assert_white_listed %(<SCRIPT SRC=http://ha.ckers.org/xss.js?<B>), "<b>"
+ end
+
+ def test_should_sanitize_half_open_scripts
+ assert_white_listed %(<IMG SRC="javascript:alert('XSS')"), "<img>"
+ 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_white_listed img_hack, "<img>"
+ end
+
+ def test_should_allow_custom_block
+ html = %(<SCRIPT type="javascript">foo</SCRIPT><img>blah</img><blink>blah</blink>)
+ safe = white_list html do |node, bad|
+ bad == 'script' ? nil : node
+ end
+ assert_equal "<img>blah</img><blink>blah</blink>", safe
+ end
+
+ def test_should_sanitize_attributes
+ assert_white_listed %(<SPAN title="'><script>alert()</script>">blah</SPAN>), %(<span title="'><script>alert()</script>">blah</span>)
+ end
+
+ protected
+ def assert_white_listed(text, expected = nil)
+ assert_equal((expected || text), white_list(text))
+ end
+end
projects / selectricity-live / commitdiff