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Tests.cs
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using AngleSharp;
using AngleSharp.Css;
using AngleSharp.Css.Dom;
using AngleSharp.Css.Parser;
using AngleSharp.Dom;
using AngleSharp.Html.Dom;
using AngleSharp.Html.Parser;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using Xunit;
// Tests based on tests from http://roadkill.codeplex.com/
// To create unit tests in this class reference is taken from
// https://www.owasp.org/index.php/XSS_(Cross_Site_Scripting)_Prevention_Cheat_Sheet#RULE_.232_-_Attribute_Escape_Before_Inserting_Untrusted_Data_into_HTML_Common_Attributes
// and http://ha.ckers.org/xss.html
namespace Ganss.XSS.Tests
{
public class HtmlSanitizerFixture
{
public HtmlSanitizer Sanitizer { get; set; } = new HtmlSanitizer();
}
/// <summary>
/// Tests for <see cref="HtmlSanitizer"/>.
/// </summary>
public class HtmlSanitizerTests : IClassFixture<HtmlSanitizerFixture>
{
public HtmlSanitizer Sanitizer { get; set; }
public HtmlSanitizerTests(HtmlSanitizerFixture fixture)
{
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
Sanitizer = fixture.Sanitizer;
}
/// <summary>
/// A test for Xss locator
/// </summary>
[Fact]
public void XSSLocatorTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<a href=\"'';!--\"<XSS>=&{()}\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = @"<a href=""'';!--"">=&{()}""></a>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector
/// Example <!-- <IMG SRC="javascript:alert('XSS');"> -->
/// </summary>
[Fact]
public void ImageXSS1Test()
{
// Arrange
var sanitizer = Sanitizer;
// Action
string htmlFragment = "<IMG SRC=\"javascript:alert('XSS');\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector without quotes and semicolon.
/// Example <!-- <IMG SRC=javascript:alert('XSS')> -->
/// </summary>
[Fact]
public void ImageXSS2Test()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=javascript:alert('XSS')>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<IMG>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image xss vector with case insensitive.
/// Example <!-- <IMG SRC=JaVaScRiPt:alert('XSS')> -->
/// </summary>
[Fact]
public void ImageCaseInsensitiveXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=JaVaScRiPt:alert('XSS')>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<IMG>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with Html entities
/// Example <!-- <IMG SRC=javascript:alert("XSS")> -->
/// </summary>
[Fact]
public void ImageHtmlEntitiesXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=javascript:alert("XSS")>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<IMG>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with grave accent
/// Example <!-- <IMG SRC=`javascript:alert("RSnake says, 'XSS'")`> -->
/// </summary>
[Fact]
public void ImageGraveAccentXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=`javascript:alert(\"RSnake says, 'XSS'\")`>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with malformed
/// Example <!-- <IMG \"\"\"><SCRIPT>alert(\"XSS\")</SCRIPT>\"> -->
/// </summary>
[Fact]
public void ImageMalformedXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG \"\"\"><SCRIPT>alert(\"XSS\")</SCRIPT>\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>\">";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with ImageFromCharCode
/// Example <!-- <IMG SRC=javascript:alert(String.fromCharCode(88,83,83))> -->
/// </summary>
[Fact]
public void ImageFromCharCodeXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=javascript:alert(String.fromCharCode(88,83,83))>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with UTF-8 Unicode
/// Example <!-- <IMG SRC=javascript:alert('XSS')> -->
/// </summary>
[Fact]
public void ImageUTF8UnicodeXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=javascript:alert('XSS')>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with Long UTF-8 Unicode
/// Example <!-- <IMG SRC=javascript:alert('XSS')> -->
/// </summary>
[Fact]
public void ImageLongUTF8UnicodeXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=javascript:alert('XSS')>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with Hex encoding without semicolon
/// Example <!-- <IMG SRC=javascript:alert('XSS')> -->
/// </summary>
[Fact]
public void ImageHexEncodeXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=javascript:alert('XSS')>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with embedded tab
/// Example <!-- <IMG SRC=\"jav ascript:alert('XSS');\"> -->
/// </summary>
[Fact]
public void ImageEmbeddedTabXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=\"jav ascript:alert('XSS');\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with embedded encoded tab
/// Example <!-- <IMG SRC="jav	ascript:alert('XSS');"> -->
/// </summary>
[Fact]
public void ImageEmbeddedEncodedTabXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=\"jav	ascript:alert('XSS');\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with embedded new line
/// Example <!-- <IMG SRC="jav
ascript:alert('XSS');"> -->
/// </summary>
[Fact]
public void ImageEmbeddedNewLineXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=\"jav
ascript:alert('XSS');\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with embedded carriage return
/// Example <!-- <IMG SRC=\"jav
ascript:alert('XSS');\"> -->
/// </summary>
[Fact]
public void ImageEmbeddedCarriageReturnXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=\"jav
ascript:alert('XSS');\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with Multiline using ASCII carriage return
/// Example <!-- <IMG
/// SRC
/// =
/// "
/// j
/// a
/// v
/// a
/// s
/// c
/// r
/// i
/// p
/// t
/// :
/// a
/// l
/// e
/// r
/// t
/// (
/// '
/// X
/// S
/// S
/// '
/// )
/// "
///> -->
/// </summary>
[Fact]
public void ImageMultilineInjectedXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = @"<IMG
SRC
=
""
j
a
v
a
s
c
r
i
p
t
:
a
l
e
r
t
(
'
X
S
S
'
)
""
>
";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>\n";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with Null breaks up Javascript directive
/// Example <!-- perl -e 'print "<IMG SRC=java\0script:alert(\"XSS\")>";' > out -->
/// </summary>
[Fact]
public void ImageNullBreaksUpXSSTest1()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=java\0script:alert(\"XSS\")>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with Null breaks up cross site scripting vector
/// Example <!-- <image src=" perl -e 'print "<SCR\0IPT>alert(\"XSS\")</SCR\0IPT>";' > out "> -->
/// </summary>
[Fact]
public void ImageNullBreaksUpXSSTest2()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<SCR\0IPT>alert(\"XSS\")</SCR\0IPT>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with spaces and Meta characters
/// Example <!-- <IMG SRC="  javascript:alert('XSS');"> -->
/// </summary>
[Fact]
public void ImageSpaceAndMetaCharXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=\"  javascript:alert('XSS');\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with half open html
/// Example <!-- <IMG SRC="javascript:alert('XSS')" -->
/// </summary>
[Fact]
public void ImageHalfOpenHtmlXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=\"javascript:alert('XSS')\"";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with double open angle bracket
/// Example <!-- <image src=http://ha.ckers.org/scriptlet.html < -->
/// </summary>
[Fact]
public void ImageDoubleOpenAngleBracketXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<image src=http://ha.ckers.org/scriptlet.html <";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Dic Xss vector with Javascript escaping
/// Example <!-- <div style="\";alert('XSS');//"> -->
/// </summary>
[Fact]
public void DivJavascriptEscapingXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<div style=\"\";alert('XSS');//\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<div style=\"\"></div>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with input image
/// Example <!-- <INPUT TYPE="IMAGE" SRC="javascript:alert('XSS');"> -->
/// </summary>
[Fact]
public void ImageInputXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<INPUT TYPE=\"IMAGE\" SRC=\"javascript:alert('XSS');\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<input type=\"image\">";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with Dynsrc
/// Example <!-- <IMG DYNSRC="javascript:alert('XSS')"> -->
/// </summary>
[Fact]
public void ImageDynsrcXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG DYNSRC=\"javascript:alert('XSS')\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image Xss vector with Lowsrc
/// Example <!-- <IMG LOWSRC="javascript:alert('XSS')"> -->
/// </summary>
[Fact]
public void ImageLowsrcXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG LOWSRC=\"javascript:alert('XSS')\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Xss vector with BGSound
/// Example <!-- <BGSOUND SRC="javascript:alert('XSS');"> -->
/// </summary>
[Fact]
public void BGSoundXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<BGSOUND SRC=\"javascript:alert('XSS');\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for BR with Javascript Include
/// Example <!-- <BR SIZE="&{alert('XSS')}"> -->
/// </summary>
[Fact]
public void BRJavascriptIncludeXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<BR SIZE=\"&{alert('XSS')}\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<BR>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for P with url in style
/// Example <!-- <p STYLE="behavior: url(www.ha.ckers.org);"> -->
/// </summary>
[Fact]
public void PWithUrlInStyleXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<p STYLE=\"behavior: url(www.ha.ckers.org);\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
// intentionally keep it failing to get notice when reviewing unit tests so can disucss
string expected = "<p></p>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image with vbscript
/// Example <!-- <IMG SRC='vbscript:msgbox("XSS")'> -->
/// </summary>
[Fact]
public void ImageWithVBScriptXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC='vbscript:msgbox(\"XSS\")'>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image with Mocha
/// Example <!-- <IMG SRC="mocha:[code]"> -->
/// </summary>
[Fact]
public void ImageWithMochaXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=\"mocha:[code]\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image with Livescript
/// Example <!-- <IMG SRC="Livescript:[code]"> -->
/// </summary>
[Fact]
public void ImageWithLivescriptXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG SRC=\"Livescript:[code]\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Iframe
/// Example <!-- <IFRAME SRC="javascript:alert('XSS');"></IFRAME> -->
/// </summary>
[Fact]
public void IframeXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IFRAME SRC=\"javascript:alert('XSS');\"></IFRAME>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Frame
/// Example <!-- <FRAMESET><FRAME SRC="javascript:alert('XSS');"></FRAMESET> -->
/// </summary>
[Fact]
public void FrameXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<FRAMESET><FRAME SRC=\"javascript:alert('XSS');\"></FRAMESET>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Table
/// Example <!-- <TABLE BACKGROUND="javascript:alert('XSS')"> -->
/// </summary>
[Fact]
public void TableXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<TABLE BACKGROUND=\"javascript:alert('XSS')\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<table></table>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for TD
/// Example <!-- <TABLE><TD BACKGROUND="javascript:alert('XSS')"> -->
/// </summary>
[Fact]
public void TDXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<TABLE><TD BACKGROUND=\"javascript:alert('XSS')\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<table><tbody><tr><td></td></tr></tbody></table>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Div Background Image
/// Example <!-- <DIV STYLE="background-image: url(javascript:alert('XSS'))"> -->
/// </summary>
[Fact]
public void DivBackgroundImageXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<DIV STYLE=\"background-image: url(javascript:alert('XSS'))\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<div></div>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Div Background Image with unicoded XSS
/// Example <!-- <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"> -->
/// </summary>
[Fact]
public void DivBackgroundImageWithUnicodedXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = @"<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\0027\0058\0053\0053\0027\0029'\0029"">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<div></div>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Div Background Image with extra characters
/// Example <!-- <DIV STYLE="background-image: url(javascript:alert('XSS'))"> -->
/// </summary>
[Fact]
public void DivBackgroundImageWithExtraCharactersXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<DIV STYLE=\"background-image: url(javascript:alert('XSS'))\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<div></div>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for DIV expression
/// Example <!-- <DIV STYLE="width: expression(alert('XSS'));"> -->
/// </summary>
[Fact]
public void DivExpressionXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<DIV STYLE=\"width: expression(alert('XSS'));\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<div></div>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for Image with break up expression
/// Example <!-- <IMG STYLE="xss:expr/*XSS*/ession(alert('XSS'))"> -->
/// </summary>
[Fact]
public void ImageStyleExpressionXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<IMG STYLE=\"xss:expr/*XSS*/ession(alert('XSS'))\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "<img>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for AnchorTag with break up expression
/// Example <!-- exp/*<A STYLE='no\xss:noxss("*//*");xss:ex/*XSS*//*/*/pression(alert("XSS"))'> -->
/// </summary>
[Fact]
public void AnchorTagStyleExpressionXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "exp/*<A STYLE='no\\xss:noxss(\"*//*\");xss:ex/*XSS*//*/*/pression(alert(\"XSS\"))'>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "exp/*<a></a>";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for BaseTag
/// Example <!-- <BASE HREF="javascript:alert('XSS');//"> -->
/// </summary>
[Fact]
public void BaseTagXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<BASE HREF=\"javascript:alert('XSS');//\">";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for EMBEDTag
/// Example <!-- <EMBED SRC="http://ha.ckers.org/xss.swf" AllowScriptAccess="always"></EMBED> -->
/// </summary>
[Fact]
public void EmbedTagXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<EMBED SRC=\"http://ha.ckers.org/xss.swf\" AllowScriptAccess=\"always\"></EMBED>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for EMBEDSVG
/// Example <!-- <EMBED SRC="data:image/svg+xml;base64,PHN2ZyB4bWxuczpzdmc9Imh0dH A6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcv MjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hs aW5rIiB2ZXJzaW9uPSIxLjAiIHg9IjAiIHk9IjAiIHdpZHRoPSIxOTQiIGhlaWdodD0iMjAw IiBpZD0ieHNzIj48c2NyaXB0IHR5cGU9InRleHQvZWNtYXNjcmlwdCI+YWxlcnQoIlh TUyIpOzwvc2NyaXB0Pjwvc3ZnPg==" type="image/svg+xml" AllowScriptAccess="always"></EMBED> -->
/// </summary>
[Fact]
public void EmbedSVGXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<EMBED SRC=\"data:image/svg+xml;base64,PHN2ZyB4bWxuczpzdmc9Imh0dH A6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcv MjAwMC9zdmciIHhtbG5zOnhsaW5rPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5L3hs aW5rIiB2ZXJzaW9uPSIxLjAiIHg9IjAiIHk9IjAiIHdpZHRoPSIxOTQiIGhlaWdodD0iMjAw IiBpZD0ieHNzIj48c2NyaXB0IHR5cGU9InRleHQvZWNtYXNjcmlwdCI+YWxlcnQoIlh TUyIpOzwvc2NyaXB0Pjwvc3ZnPg==\" type=\"image/svg+xml\" AllowScriptAccess=\"always\"></EMBED>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>
/// A test for XML namespace
/// Example <!-- <HTML xmlns:xss> <?import namespace="xss" implementation="http://ha.ckers.org/xss.htc"> <xss:xss>XSS</xss:xss></HTML> -->
/// </summary>
[Fact]
public void XmlNamespaceXSSTest()
{
// Arrange
var sanitizer = Sanitizer;
// Act
string htmlFragment = "<HTML xmlns:xss><?import namespace=\"xss\" implementation=\"http://ha.ckers.org/xss.htc\"><xss:xss>XSS</xss:xss></HTML>";
string actual = sanitizer.Sanitize(htmlFragment);
// Assert
string expected = "";
Assert.Equal(expected, actual, ignoreCase: true);
}
/// <summary>