title: Unable to create SAML Response from string in java
body: <p>I've implemented a SAML2 SSO integration with Spring security, and now I'm trying to create a <code>SAMLObject</code> Response from a <code>string()</code> for testing and creating a more robust and safe integration. I've been following multiple projects on Github:</p>
  
  <ol>
  <li><a href="https://github.com/jrowny/java-saml/blob/master/src/com/onelogin/saml/Response.java" rel="nofollow noreferrer">https://github.com/jrowny/java-saml/blob/master/src/com/onelogin/saml/Response.java</a> </li>
  <li><a href="https://github.com/oaeproject/SAMLParser/blob/master/src/main/java/org/sakaiproject/SAMLParser/SAMLParser.java" rel="nofollow noreferrer">https://github.com/oaeproject/SAMLParser/blob/master/src/main/java/org/sakaiproject/SAMLParser/SAMLParser.java</a></li>
  </ol>
  
  <p>and I've came up with this code:</p>
  
  <pre><code>public static XMLObject stringToSAMLResponse(String samlResponse) throws Exception {
      BasicParserPool parser = new BasicParserPool();
      parser.setNamespaceAware(true);
  
      StringReader reader = new StringReader(samlResponse);
  
      Document doc = parser.parse(reader);
      Element samlElement = doc.getDocumentElement();
  
      UnmarshallerFactory unmarshallerFactory = Configuration.getUnmarshallerFactory();
      Unmarshaller unmarshaller = unmarshallerFactory.getUnmarshaller(samlElement);
      if (unmarshaller == null) {
          throw new Exception("Failed to unmarshal");
      }
      return unmarshaller.unmarshall(samlElement);
  }
  </code></pre>
  
  <p>Unfortunately, this method just doesn't work, I'm getting the following stack trace:</p>
  
  <pre><code>java.lang.Exception: Failed to unmarshal
      at com.clarisite.clingine.clinginewebinterface.security.SAMLUtils.stringToSAMLResponse(SAMLUtils.java:27)
      at com.clarisite.clingine.clinginewebinterface.security.SAMLUtilsTest.samlResponseStringToResponseTest(SAMLUtilsTest.java:22)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:498)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
      at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
      at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
      at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
      at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
      at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
      at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70
  </code></pre>
  
  <p>The String I'm trying to parse is something like this:
  <code>https://www.samltool.com/generic_sso_res.php</code></p>