Merge branch 'main' into guava-migration-do-less

.gitattributes

@@ -0,0 +1,13 @@
+/COPYING text
+/src/test/resources/org/owasp/html/* text eol=lf
+.gitattributes text
+.gitignore text
+*.html text
+*.java text
+*.js text
+*.json text
+*.md text
+*.sh text
+*.txt text
+*.xml text
+*.yml text

.github/workflows/maven.yml

@@ -0,0 +1,43 @@
+# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-maven
+
+name: Java CI with Maven
+
+on:
+  push:
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/maven.yml'
+  pull_request:
+    paths-ignore:
+      - '.github/workflows/*.yml'
+      - '!.github/workflows/maven.yml'
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    strategy:
+      matrix:
+        java: [ '11', '17', '21' ]
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up JDK ${{ matrix.Java }}
+      uses: actions/setup-java@v4
+      with:
+        java-version: ${{ matrix.Java }}
+        distribution: 'temurin'
+        cache: maven
+    - name: Build with Maven
+      run: mvn --batch-mode --errors --fail-at-end --show-version --update-snapshots verify
+    - name: Store artifact
+      if: ${{ matrix.Java == 11 }}
+      uses: actions/upload-artifact@v4
+      with:
+        name: jar-jdk${{ matrix.Java }}
+        path: target/*.jar
+        retention-days: 7

README.md

@@ -7,7 +7,7 @@ A fast and easy to configure HTML Sanitizer written in Java which lets
 you include HTML authored by third-parties in your web application while
 protecting against XSS.
 
-The existing dependencies are on guava and JSR 305.  The other jars
+The existing dependency is on JSR 305. The other jars
 are only needed by the test suite.  The JSR 305 dependency is a
 compile-only dependency, only needed for annotations.
 

RELEASE-checklist.sh

@@ -8,7 +8,6 @@ set -e
 
 
 # Make sure the build is ok via
-mvn -Dguava.version=27.0-jre -f aggregate clean verify                    javadoc:jar source:jar
 mvn                          -f aggregate clean verify jacoco:report site javadoc:jar source:jar
 mvn install
 mvn org.sonatype.ossindex.maven:ossindex-maven-plugin:audit -f aggregate

docs/getting_started.md

@@ -4,12 +4,11 @@
 
 If you are using Maven then follow the [maven](maven.md) directions to
 add a dependency.  Otherwise,
-[download prebuilt jars](https://search.maven.org/#artifactdetails%7Ccom.googlecode.owasp-java-html-sanitizer%7Cowasp-java-html-sanitizer%7C20180219.1%7Cjar)
+[download prebuilt jars](https://search.maven.org/artifact/com.googlecode.owasp-java-html-sanitizer/owasp-java-html-sanitizer/)
 or `git clone [email protected]:OWASP/java-html-sanitizer.git` and build
 the latest source.
 
-Unless maven is managing your CLASSPATH for you, you need to add both `owasp-java-html-sanitizer.jar` and the
-Guava JAR.
+Unless maven is managing your CLASSPATH for you, you need to add `owasp-java-html-sanitizer.jar`.
 
 Once you have your CLASSPATH set up correctly with the relevant JARs
 you should be able to add

parent/pom.xml

@@ -257,7 +257,7 @@ application while protecting against XSS.
       <dependency>
         <groupId>com.google.protobuf</groupId>
         <artifactId>protobuf-java</artifactId>
-        <version>3.9.1</version>
+        <version>3.16.3</version>
         <scope>provided</scope>
       </dependency>
       <dependency>

src/main/java/org/owasp/html/Encoding.java

@@ -43,6 +43,7 @@ public final class Encoding {
    * @return text/plain
    * @deprecated specify whether s is in an attribute value
    */
+  @Deprecated
   public static String decodeHtml(String s) {
     return decodeHtml(s, false);
   }

src/main/java/org/owasp/html/HtmlEntities.java

@@ -2309,6 +2309,7 @@ final class HtmlEntities {
    * @return The offset after the end of the decoded sequence in {@code html}.
    * @deprecated specify whether html is in an attribute value.
    */
+  @Deprecated
   public static int appendDecodedEntity(
      String html, int offset, int limit, StringBuilder sb) {
     return appendDecodedEntity(html, offset, limit, false, sb);

src/main/java/org/owasp/html/HtmlPolicyBuilder.java

@@ -33,7 +33,6 @@
 import java.util.HashMap;
 import java.util.HashSet;
 import java.util.LinkedHashMap;
-import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -966,12 +965,11 @@ public AttributeBuilder matching(
      */
     @SuppressWarnings("synthetic-access")
     public HtmlPolicyBuilder globally() {
-      if(attributeNames.get(0).equals("style")) {
-        return allowStyling();
-      } else {
-        return HtmlPolicyBuilder.this.allowAttributesGlobally(
-            policy, attributeNames);
+      if (attributeNames.contains("style")) {
+        allowStyling();
       }
+      return HtmlPolicyBuilder.this.allowAttributesGlobally(
+          policy, attributeNames);
     }
 
     /**
@@ -1040,6 +1038,7 @@ public String apply(String elementName, List<String> attrs) {
             relValue = DEFAULT_RELS_ON_TARGETTED_LINKS_STR;
           } else {
             StringBuilder sb = new StringBuilder();
+            Set<String> present = new HashSet<String>();
             if (relIndex >= 0) {
               // Preserve values that are not explicitly skipped.
               String rels = attrs.get(relIndex);
@@ -1050,25 +1049,34 @@ public String apply(String elementName, List<String> attrs) {
                     if (skip.isEmpty()
                         || !skip.contains(
                             Strings.toLowerCase(rels.substring(left, i)))) {
-                      sb.append(rels, left, i).append(' ');
+                      String rel = rels.substring(left, i);
+                      present.add(rel);
+                      sb.append(rel).append(' ');
                     }
                   }
                   left = i + 1;
                 }
               }
             }
             for (String s : extra) {
-              sb.append(s).append(' ');
+              if (!present.contains(s)) {
+                sb.append(s).append(' ');
+                present.add(s);
+              }
             }
             if (hasTarget) {
               for (String s : whenTargetPresent) {
-                sb.append(s).append(' ');
+                if (!present.contains(s)) {
+                  sb.append(s).append(' ');
+                  present.add(s);
+                }
               }
             }
             int sblen = sb.length();
             if (sblen == 0) {
               relValue = "";
             } else {
+              // Trim last space.
               relValue = sb.substring(0, sb.length() - 1);
             }
           }

src/main/java/org/owasp/html/HtmlStreamRenderer.java

@@ -33,6 +33,7 @@
 import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
+import java.util.Set;
 
 import javax.annotation.WillCloseWhenClosed;
 import javax.annotation.concurrent.NotThreadSafe;
@@ -57,6 +58,8 @@ public class HtmlStreamRenderer implements HtmlStreamEventReceiver {
   private StringBuilder pendingUnescaped;
   private HtmlTextEscapingMode escapingMode = HtmlTextEscapingMode.PCDATA;
   private boolean open;
+  /** The count of {@link #foreignContentRootElementNames} opened and not subsequently closed. */
+  private int foreignContentDepth = 0;
 
   /**
    * Factory.
@@ -168,7 +171,25 @@ private void writeOpenTag(
       return;
     }
 
-    escapingMode = HtmlTextEscapingMode.getModeForTag(elementName);
+    if (foreignContentRootElementNames.contains(elementName)) {
+      foreignContentDepth += 1;
+    }
+
+    HtmlTextEscapingMode tentativeEscapingMode = HtmlTextEscapingMode.getModeForTag(elementName);
+    if (foreignContentDepth == 0) {
+      escapingMode = tentativeEscapingMode;
+    } else {
+      switch (tentativeEscapingMode) {
+        case PCDATA:
+        case VOID:
+          escapingMode = tentativeEscapingMode;
+          break;
+        default: // escape special characters but do not allow tags
+          escapingMode = HtmlTextEscapingMode.RCDATA;
+          break;
+      }
+    }
+
 
     switch (escapingMode) {
       case CDATA_SOMETIMES:
@@ -240,6 +261,10 @@ private final void writeCloseTag(String uncanonElementName)
       return;
     }
 
+    if (foreignContentDepth != 0 && foreignContentRootElementNames.contains(elementName)) {
+      foreignContentDepth -= 1;
+    }
+
     if (pendingUnescaped != null) {
       if (!lastTagOpened.equals(elementName)) {
         error("Tag content cannot appear inside CDATA element", elementName);
@@ -436,4 +461,6 @@ public void close() throws IOException {
   private static boolean isTagEnd(char ch) {
     return ch < 63 && 0 != (TAG_ENDS & (1L << ch));
   }
+
+  private static final Set<String> foreignContentRootElementNames = Set.of("svg", "math");
 }

src/test/java/org/owasp/html/Benchmark.java

@@ -58,7 +58,7 @@ public class Benchmark {
    * specifies a benchmark to run and unspecified ones are not run.
    */
   public static void main(String[] args) throws Exception {
-    String html = Files.readString(new File(args[0]).toPath(), StandardCharsets.UTF_8);
+    String html = new String(Files.readAllBytes(new File(args[0]).toPath()), StandardCharsets.UTF_8);
 
     boolean timeLibhtmlparser = true;
     boolean timeSanitize = true;

src/test/java/org/owasp/html/CssSchemaTest.java

@@ -55,6 +55,9 @@ public static final void testDangerousProperties() {
           // Prefix corner cases.
           "-",
           "-moz-",
+          "-ms-",
+          "-o-",
+          "-webkit-",
         }) {
       assertSame(key, CssSchema.DISALLOWED, CssSchema.DEFAULT.forKey(key));
     }

src/test/java/org/owasp/html/HtmlLexerTest.java

@@ -45,12 +45,12 @@ public class HtmlLexerTest extends TestCase {
   @Test
   public final void testHtmlLexer() throws Exception {
     // Do the lexing.
-    String input = new String(Files.readString(Paths.get(getClass().getResource("htmllexerinput1.html").toURI()), StandardCharsets.UTF_8));
+    String input = new String(Files.readAllBytes(Paths.get(getClass().getResource("htmllexerinput1.html").toURI())), StandardCharsets.UTF_8);
     StringBuilder actual = new StringBuilder();
     lex(input, actual);
 
     // Get the golden.
-    String golden = new String(Files.readString(Paths.get(getClass().getResource("htmllexergolden1.txt").toURI()), StandardCharsets.UTF_8));
+    String golden = new String(Files.readAllBytes(Paths.get(getClass().getResource("htmllexergolden1.txt").toURI())), StandardCharsets.UTF_8);
 
     // Compare.
     assertEquals(golden, actual.toString());