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[CSS Sanitizer] Allow more css length units #178

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merged 7 commits into from Nov 29, 2019
Merged

[CSS Sanitizer] Allow more css length units #178

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5be3eee
CSS sanitizer allows "ch" length unit
JuanitoFatas Nov 25, 2019
7c025e0
CSS sanitizer allows vw length unit
JuanitoFatas Nov 25, 2019
e3fd485
CSS sanitizer allows vh length unit
JuanitoFatas Nov 25, 2019
bd97be9
CSS sanitizer allows Q length unit
JuanitoFatas Nov 26, 2019
5fb5c40
CSS sanitizer allows lh length unit
JuanitoFatas Nov 26, 2019
24fcb17
CSS sanitizer allows vmin length unit
JuanitoFatas Nov 26, 2019
bab56b5
CSS sanitizer allows vmax length unit
JuanitoFatas Nov 26, 2019
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2 changes: 1 addition & 1 deletion lib/loofah/html5/scrub.rb
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Expand Up @@ -6,7 +6,7 @@ module Loofah
module HTML5 # :nodoc:
module Scrub
CONTROL_CHARACTERS = /[`\u0000-\u0020\u007f\u0080-\u0101]/
CSS_KEYWORDISH = /\A(#[0-9a-fA-F]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|-?\d{0,3}\.?\d{0,10}(cm|r?em|ex|in|mm|pc|pt|px|%|,|\))?)\z/
CSS_KEYWORDISH = /\A(#[0-9a-fA-F]+|rgb\(\d+%?,\d*%?,?\d*%?\)?|-?\d{0,3}\.?\d{0,10}(ch|cm|r?em|ex|in|lh|mm|pc|pt|px|Q|vmax|vmin|vw|vh|%|,|\))?)\z/
CRASS_SEMICOLON = { :node => :semicolon, :raw => ";" }

class << self
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42 changes: 42 additions & 0 deletions test/html5/test_sanitizer.rb
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Expand Up @@ -299,6 +299,48 @@ def test_css_rem_value
assert_match %r/10rem/, sane.inner_html
end

def test_css_ch_value
html = "<div style=\"width:60ch;\">"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :escape).to_xml)
assert_match %r/60ch/, sane.inner_html
end

def test_css_vw_value
html = "<div style=\"font-size: calc(16px + 1vw);\"></body>"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :escape).to_xml)
assert_match %r/1vw/, sane.inner_html
end

def test_css_vh_value
html = "<div style=\"height: 100vh;\"></body>"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :escape).to_xml)
assert_match %r/100vh/, sane.inner_html
end

def test_css_Q_value
html = "<div style=\"height: 10Q;\"></body>"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :escape).to_xml)
assert_match %r/10Q/, sane.inner_html
end

def test_css_lh_value
html = "<p style=\"line-height: 2lh;\"></body>"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :escape).to_xml)
assert_match %r/2lh/, sane.inner_html
end

def test_css_vmin_value
html = "<div style=\"width: 42vmin;\"></body>"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :escape).to_xml)
assert_match %r/42vmin/, sane.inner_html
end

def test_css_vmax_value
html = "<div style=\"width: 42vmax;\"></body>"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :escape).to_xml)
assert_match %r/42vmax/, sane.inner_html
end

def test_css_function_sanitization_leaves_safelisted_functions_calc
html = "<span style=\"width:calc(5%)\">"
sane = Nokogiri::HTML(Loofah.scrub_fragment(html, :strip).to_html)
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