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Allowing HTML attributes with _ as the first character in the name (#355) #356

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Allowing HTML attributes with _ as the first character in the name (#355) #356

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4 changes: 3 additions & 1 deletion owasp-java-html-sanitizer/src/main/java/org/owasp/html/HtmlStreamRenderer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -393,9 +393,11 @@ static boolean isValidHtmlName(String name) {
if (i == 0 || i + 1 == n) { return false; }
break;
case '-':
case '_':
if (i == 0 || i + 1 == n) { return false; }
break;
case '_':
if (i + 1 == n) { return false; }
break;
default:
if (ch <= '9') {
if (i == 0 || ch < '0') { return false; }
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10 changes: 9 additions & 1 deletion owasp-java-html-sanitizer/src/test/java/org/owasp/html/HtmlSanitizerTest.java
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Original file line number Diff line number Diff line change
Expand Up @@ -195,6 +195,13 @@ public static final void testEmptyAndValuelessAttributes() {
sanitize("<input checked type=checkbox id=\"\" class=>"));
}

@Test
public final void testAllowedAttributes() {
assertEquals(
"<div __foo=\"__foo\" __bar=\"foo\" foo-bar=\"foo-bar\"></div>",
sanitize("<div __foo __bar=\"foo\" foo-bar></div>"));
}

@Test
public static final void testSgmlShortTags() {
// We make no attempt to correctly handle SGML short tags since they are
Expand Down Expand Up @@ -471,7 +478,8 @@ public void handle(String errorMessage) {
"ol", "p", "span", "ul", "noscript", "noframes", "noembed", "noxss")
// And these attributes.
.allowAttributes(
"dir", "checked", "class", "href", "id", "target", "title", "type")
"dir", "checked", "class", "href", "id", "target", "title", "type",
"__foo", "__bar", "foo-bar")
.globally()
// Cleanup IDs and CLASSes and prefix them with p- to move to a separate
// name-space.
Expand Down