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# frozen_string_literal: true
require "helper"
class UnitHTML5Scrub < Loofah::TestCase
include Loofah
describe ".scrub_css" do
describe "hex values" do
it "handles upper case" do
assert_equal "background:#ABC012;", Loofah::HTML5::Scrub.scrub_css("background: #ABC012")
end
it "handles lower case" do
assert_equal "background:#abc012;", Loofah::HTML5::Scrub.scrub_css("background: #abc012")
end
end
describe "css functions" do
it "allows safe functions" do
assert_equal(
"background-color:linear-gradient(transparent 50%, #ffff66 50%);",
Loofah::HTML5::Scrub.scrub_css("background-color: linear-gradient(transparent 50%, #ffff66 50%);"),
)
end
it "disallows unsafe functions" do
assert_equal(
"",
Loofah::HTML5::Scrub.scrub_css("background-color: haxxor-fun(transparent 50%, #ffff66 50%);"),
)
end
# see #199 for the bug we're testing here
it "allows safe functions in shorthand css properties" do
assert_equal(
"background:linear-gradient(transparent 50%, #ffff66 50%);",
Loofah::HTML5::Scrub.scrub_css("background: linear-gradient(transparent 50%, #ffff66 50%);"),
)
end
end
describe "property string values" do
it "allows hypenated values" do
text = "font-family:'AvenirNext-Regular';"
assert_equal(text, Loofah::HTML5::Scrub.scrub_css(text))
text = 'font-family:"AvenirNext-Regular";'
assert_equal(text, Loofah::HTML5::Scrub.scrub_css(text))
end
it "allows embedded spaces in values" do
text = "font-family:'Avenir Next';"
assert_equal(text, Loofah::HTML5::Scrub.scrub_css(text))
text = 'font-family:"Avenir Next";'
assert_equal(text, Loofah::HTML5::Scrub.scrub_css(text))
end
it "does not allow values with embedded or irregular quotes" do
assert_empty(Loofah::HTML5::Scrub.scrub_css(%q(font-family:'AvenirNext"-Regular';)))
assert_empty(Loofah::HTML5::Scrub.scrub_css(%q(font-family:"AvenirNext'-Regular";)))
assert_empty(Loofah::HTML5::Scrub.scrub_css("font-family:'AvenirNext-Regular;"))
assert_empty(Loofah::HTML5::Scrub.scrub_css(%q(font-family:'AvenirNext-Regular";)))
assert_empty(Loofah::HTML5::Scrub.scrub_css('font-family:"AvenirNext-Regular;'))
assert_empty(Loofah::HTML5::Scrub.scrub_css(%q(font-family:"AvenirNext-Regular';)))
end
it "keeps whitespace around delimiters if it's already there" do
assert_equal(
"font:13px / 1.5 Arial , sans-serif;",
Loofah::HTML5::Scrub.scrub_css("font: 13px / 1.5 Arial , sans-serif;"),
)
end
it "does not insert spaces around delimiters if they aren't already there" do
assert_equal(
"font:13px/1.5 Arial, sans-serif;",
Loofah::HTML5::Scrub.scrub_css("font: 13px/1.5 Arial, sans-serif;"),
)
end
end
describe "whitespace" do
it "converts all whitespace to a single space except initial and final whitespace" do
assert_equal("font:12px Arial;", Loofah::HTML5::Scrub.scrub_css("font: \n\t 12px \n\t Arial \n\t ;"))
end
end
describe "colors" do
it "allows basic and extended colors" do
text = "background-color:blue;"
assert_equal(text, Loofah::HTML5::Scrub.scrub_css(text))
text = "background-color:brown;"
assert_equal(text, Loofah::HTML5::Scrub.scrub_css(text))
text = "background-color:lightblue;"
assert_equal(text, Loofah::HTML5::Scrub.scrub_css(text))
end
it "does not allow non-colors" do
text = "background-color:blurple;"
assert_empty(Loofah::HTML5::Scrub.scrub_css(text))
end
end
end
describe ".allowed_uri?" do
it "allows http URIs" do
assert(Loofah::HTML5::Scrub.allowed_uri?("http://example.com"))
end
it "allows https URIs" do
assert(Loofah::HTML5::Scrub.allowed_uri?("https://example.com"))
end
it "allows mailto URIs" do
assert(Loofah::HTML5::Scrub.allowed_uri?("mailto:foo@example.com"))
end
it "allows relative URIs" do
assert(Loofah::HTML5::Scrub.allowed_uri?("/path/to/file"))
assert(Loofah::HTML5::Scrub.allowed_uri?("path/to/file"))
assert(Loofah::HTML5::Scrub.allowed_uri?("file.html"))
assert(Loofah::HTML5::Scrub.allowed_uri?("#anchor"))
end
it "disallows javascript URIs" do
refute(Loofah::HTML5::Scrub.allowed_uri?("javascript:alert(1)"))
end
it "disallows javascript URIs with capital letters" do
refute(Loofah::HTML5::Scrub.allowed_uri?("JavaScript:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("JAVASCRIPT:alert(1)"))
end
it "disallows javascript URIs with HTML entities" do
refute(Loofah::HTML5::Scrub.allowed_uri?("javascript:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("javascript:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("javascript:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("javascript&colon;alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("javascript&co\x00lon;alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("javascript&co\tlon;alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("javascript&co\nlon;alert(1)"))
end
it "disallows javascript URIs with control characters" do
refute(Loofah::HTML5::Scrub.allowed_uri?("java\x00script:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("java\tscript:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("java\nscript:alert(1)"))
end
it "disallows javascript URIs with control characters in HTML entities" do
refute(Loofah::HTML5::Scrub.allowed_uri?("java\x0015;cript:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("java&#x\t73;cript:alert(1)"))
end
it "disallows javascript URIs with entity-encoded control characters splitting the scheme" do
refute(Loofah::HTML5::Scrub.allowed_uri?("java script:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("java script:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("jav	ascript:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("java
script:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("java
script:alert(1)"))
refute(Loofah::HTML5::Scrub.allowed_uri?("jav	ascript:alert(1)"))
end
it "disallows vbscript URIs" do
refute(Loofah::HTML5::Scrub.allowed_uri?("vbscript:msgbox(1)"))
end
it "allows data URIs with safe mediatypes" do
assert(Loofah::HTML5::Scrub.allowed_uri?("data:image/gif;base64,R0lGODlh"))
assert(Loofah::HTML5::Scrub.allowed_uri?("data:image/png;base64,iVBORw0KGgo"))
assert(Loofah::HTML5::Scrub.allowed_uri?("data:image/jpeg;base64,/9j/4AAQ"))
assert(Loofah::HTML5::Scrub.allowed_uri?("data:text/plain,hello"))
assert(Loofah::HTML5::Scrub.allowed_uri?("data:text/css,.foo{}"))
end
it "disallows data URIs with unsafe mediatypes" do
refute(Loofah::HTML5::Scrub.allowed_uri?("data:text/html,<script>alert(1)</script>"))
refute(Loofah::HTML5::Scrub.allowed_uri?("data:text/html;base64,PHNjcmlwdD5hbGVydCgxKTwvc2NyaXB0Pg=="))
refute(Loofah::HTML5::Scrub.allowed_uri?("data:image/svg+xml,<svg onload=alert(1)>"))
refute(Loofah::HTML5::Scrub.allowed_uri?("data:foo"))
end
end
end
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