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+// Copyright 2022 Code Intelligence GmbH
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package com.example;
+
+import com.code_intelligence.jazzer.api.FuzzedDataProvider;
+import java.io.*;
+import javax.xml.parsers.*;
+import javax.xml.xpath.*;
+import org.w3c.dom.Document;
+import org.xml.sax.*;
+
+public class XPathInjection {
+ static Document doc = null;
+ static XPath xpath = null;
+
+ public static void fuzzerInitialize() throws Exception {
+ String xmlFile = "<user name=\"user\" pass=\"pass\"></user>";
+
+ DocumentBuilderFactory domFactory = DocumentBuilderFactory.newInstance();
+ domFactory.setNamespaceAware(true);
+ DocumentBuilder builder = domFactory.newDocumentBuilder();
+ doc = builder.parse(new InputSource(new StringReader(xmlFile)));
+
+ XPathFactory xpathFactory = XPathFactory.newInstance();
+ xpath = xpathFactory.newXPath();
+ }
+
+ public static void unsafeEval(String user, String pass) {
+ if (user != null && pass != null) {
+ String expression = "/user[@name='" + user + "' and @pass='" + pass + "']";
+ try {
+ xpath.evaluate(expression, doc, XPathConstants.BOOLEAN);
+ } catch (XPathExpressionException e) {
+ }
+ }
+ }
+
+ public static void fuzzerTestOneInput(FuzzedDataProvider data) {
+ unsafeEval(data.consumeString(20), data.consumeRemainingAsString());
+ }
+}