1 files changed, 247 insertions, 3 deletions

diff --git a/spss.slinterface/src/at/gv/egovernment/moa/spss/slinterface/transformers/SL2MOA.java b/spss.slinterface/src/at/gv/egovernment/moa/spss/slinterface/transformers/SL2MOA.java
index 6c476e9ce..eec295bab 100644
--- a/spss.slinterface/src/at/gv/egovernment/moa/spss/slinterface/transformers/SL2MOA.java
+++ b/spss.slinterface/src/at/gv/egovernment/moa/spss/slinterface/transformers/SL2MOA.java
@@ -5,20 +5,49 @@
  */
 package at.gv.egovernment.moa.spss.slinterface.transformers;
 
+import java.io.InputStream;
+import java.net.URL;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.GregorianCalendar;
 import java.util.HashMap;
+import java.util.StringTokenizer;
 
+import javax.servlet.ServletException;
+
+import org.apache.log4j.Logger;
 import org.w3c.dom.Document;
 import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
 
 import at.gv.egovernment.moa.spss.slinterface.Constants;
+import at.gv.egovernment.moa.spss.slinterface.DOMUtils;
+import at.gv.egovernment.moa.spss.slinterface.XPathUtils;
 
 /**
- * @author Gregor Karlinger (mailto:gregor.karlinger@cio.gv.at) 
+ * @author Gregor Karlinger (mailto:gregor.karlinger@siemens.com) 
  */
 public class SL2MOA
 {
+  private static Logger logger_ = Logger.getLogger(Constants.LH_TRANSFORMERS_);
+
   /**
-   * Transforms an SL VerifyXMLSignatureRequest into a MOA VerifyXMLSignatureRequest.
+   * Transforms an SL <code>VerifyXMLSignatureRequest</code> into a MOA <code>VerifyXMLSignatureRequest
+   * </code> and makes the following additions to the resulting <code>VerifyXMLSignatureRequest</code>:
+   * <ul>
+   *   <li>Insertion of a <code>DateTime</code> element to MOA <code>VerifyXMLSignatureRequest</code>, if no
+   *     one exists and if no <code>etsi:SigningTime</code> element exists in the xml signature of the MOA 
+   *     VerifyXMLSinatureRequest</li> and if the creation time meta information could be extracted
+   *     successfully from the E-Recht XML document signed by the XML signature contained in the
+   *     MOA <code>VerifyXMLSignatureRequest</code> (see @link #extractXMLDocCreationTime(Element)).<li>
+   *     
+   *   <li>Addition of the <code>ReturnHashInputData</code> element indicating that MOA SP should return
+   *     the hash input data for each <code>dsig:Reference</code> of the XML signature.</li>
+   *     
+   *   <li>Addition of the obligatory <code>TrustProfileID</code> element indicating the trust profile
+   *     MOA ID should use for evaluating wheter the signer certificate used for creating the XML signature
+   *     contained in the MOA <code>VerifyXMLSignatureRequest</code> is trusted.</li>     
+   * </ul>  
    * 
    * @param slVerifyXMLSignatureRequest The SL VerifyXMLSignatureRequest to be transformed.
    * 
@@ -26,9 +55,11 @@ public class SL2MOA
    *         that <code>slVerifyXMLSignatureRequest</code> is modified into the moa request.   
    * 
    * @pre slVerifyXMLSignatureRequest is a valid instance of the SL Schema (version 1.2 or 1.1).
+   * 
+   * @throws ServletException if transforming the request fails for any reason.
    */
   public static Document toMoaVerifyXMLSignatureRequest(Document slVerifyXMLSignatureRequest, 
-    String trustProfileID)
+    String trustProfileID) throws ServletException
   {
     // Namespace to namespace prefix mapping
     HashMap prefixMap = new HashMap(4);
@@ -77,6 +108,29 @@ public class SL2MOA
     // Convert SL request into MOA request
     verifyRequestElem = Utils.transformDeep(verifyRequestElem, prefixMap, nsTransforms, nameTransforms);
 
+    // Add DateTime element to MOA VerifyXMLSignature request, if 
+    // - no one exists and 
+    // - no etsi:SigningTime element exists in the xml signature of the MOA VerifyXMLSinatureRequest
+    if (!dateTimeExists(verifyRequestElem) && !signingTimeExists(verifyRequestElem))
+    {
+      // Extract creation date meta information from E-Recht XML document for use in MOA VerifyXMLSignature request
+      String dateTimeStr = extractXMLDocCreationTime(verifyRequestElem);
+      
+      if (dateTimeStr != null)
+      {
+        //  Creation date meta information could be extracted successfully from E-Recht XML document 
+        Element dateTimeElem = slVerifyXMLSignatureRequest.createElementNS(
+          Constants.NSURI_MOA_12_, Constants.NSPRE_MOA_12_ + ":DateTime");
+        dateTimeElem.appendChild(slVerifyXMLSignatureRequest.createTextNode(dateTimeStr));
+        Element verifySignatureInfoElem = DOMUtils.getChildElem(verifyRequestElem, Constants.NSURI_MOA_12_, "VerifySignatureInfo");
+        verifyRequestElem.insertBefore(dateTimeElem, verifySignatureInfoElem);
+      }
+      else
+      {
+        logger_.warn("Could not extract creation date meta information from E-Recht XML document.");
+      }
+    }
+    
     // Add ReturnHashInputData element
     Element returnHashInputDataElem = slVerifyXMLSignatureRequest.createElementNS(
       Constants.NSURI_MOA_12_, Constants.NSPRE_MOA_12_ + ":ReturnHashInputData");
@@ -90,4 +144,194 @@ public class SL2MOA
     
     return slVerifyXMLSignatureRequest;
   }
+  
+  /**
+   * Extracts the creation time meta information from the E-Recht XML document that is referenced by
+   * the XML signature contained in the specified MOA <code>VerifyXMLSignatureRequest</code>. 
+   * 
+   * @param verifyRequestElem The MOA <code>VerifyXMLSignatureRequest</code>. It is assumed that the
+   *                          request contains an XML signature which signs a E-Recht XML document 
+   *                          (referring to the E-Recht XML document and transforming it to a corresponding
+   *                          XHTML representation respectively). The E-Recht XML document is assumed to
+   *                          have a root element with the name <code>erechtdok</code> in the namespace 
+   *                          <code>http://www.bka.gv.at</code>. The creation time meta information is
+   *                          assumed to be contained in the attribute <code>h-created</code> of the root
+   *                          element. The value of the attribute <code>h-created</code> is assumed to have
+   *                          the format <code>dd. MMMMM yyyy, hh:mm:ss</code> where MMMMM denotes the month
+   *                          in German prose (see @link #convertMonth(String)).
+   *                         
+   * @return the extracted creation time meta information, or <code>null</code>, if the extraction fails for
+   *         any reason.
+   */
+  private static String extractXMLDocCreationTime(Element verifyRequestElem)
+  {
+
+    // Get E-Recht XML document using location information in  MOA VerifyXMLSignature request
+    String nSPrefixes = Constants.NSPRE_MOA_12_ + " " + Constants.NSURI_MOA_12_;
+    String xPathXMLDocumentLocContent = 
+      "//" + Constants.NSPRE_MOA_12_ + ":SupplementProfile" + 
+      "/" + Constants.NSPRE_MOA_12_ + ":Content[@Reference=\"dokument.xml\"]" +
+      "/" + Constants.NSPRE_MOA_12_ + ":LocRefContent";
+    Document xmlDocument = null;
+    try 
+    {
+      XPathUtils utils = new XPathUtils();
+      utils.setupContext(xPathXMLDocumentLocContent, verifyRequestElem, nSPrefixes);
+      NodeList resultNL = utils.selectNodeSet(verifyRequestElem);
+      
+      if (resultNL == null || resultNL.getLength() < 1)
+      {
+        logger_.warn("LocRefContent element for E-Recht XML document not found in MOA VerifyXMLSignatureRequest.");
+        return null;
+      }
+      
+      URL locRefURL = new URL(DOMUtils.getText((Element) resultNL.item(0)));
+      InputStream locRefURLIS = locRefURL.openStream();
+      xmlDocument = DOMUtils.parseWellFormed(locRefURLIS);
+    } 
+    catch (Exception e) 
+    {
+      String message = "An error occurred while trying to load E-Recht XML document:";
+      logger_.warn(message, e);
+      return null;
+    }
+    
+    // Extract attribute "h-created" from E-Recht XML document root element
+    String hCreated = xmlDocument.getDocumentElement().getAttributeNS(null, "h-created");
+    if (hCreated == null || "".equals(hCreated))
+    {
+      logger_.warn("Attribute \"h-created\" not found in E-Recht XML document root element.");
+      return null;
+    }
+    
+    // Convert attribute "h-created" into a java date ("h-created" has formats like "10. März 2006, 11:15:09")
+    try 
+    {
+      String dateStr = hCreated.substring(0, hCreated.indexOf(',')).trim();
+      String timeStr = hCreated.substring(hCreated.indexOf(',') + 1).trim();
+
+      StringTokenizer tokenizer = new StringTokenizer(dateStr, " ");
+      String dateDayStr = tokenizer.nextToken();
+      int dateDay = Integer.parseInt(dateDayStr.substring(0, dateDayStr.indexOf('.')));
+      String dateMonthAlphaStr = tokenizer.nextToken();
+      int dateMonthNum = convertMonth(dateMonthAlphaStr);
+      int dateYear = Integer.parseInt(tokenizer.nextToken());
+      
+      tokenizer = new StringTokenizer(timeStr, ":");
+      int timeHours = Integer.parseInt(tokenizer.nextToken());
+      int timeMins = Integer.parseInt(tokenizer.nextToken());
+      int timeSecs = Integer.parseInt(tokenizer.nextToken());
+      
+      GregorianCalendar calendar = new GregorianCalendar(dateYear, dateMonthNum, dateDay, timeHours, timeMins, timeSecs);
+      SimpleDateFormat dF = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss");
+      return dF.format(calendar.getTime());
+    } 
+    catch (Throwable t) 
+    {
+      logger_.warn("Attribute \"h-created\" in E-Recht XML document root element has unexpected format: " + hCreated);
+      return null;
+    }
+  }
+
+  /**
+   * Converts the specified month name into a numeric representation as specified in @link Calendar, e.g. 
+   * @link Calendar#JANUARY.
+   *  
+   * @param dateMonthAlphaStr The specified month name; must be one of <code>Jänner</code>, <code>Januar</code>,
+   *                          <code>Februar</code>, <code>Feber</code>, <code>März</code>, <code>April</code>,
+   *                          <code>Mai</code>, <code>Juni</code>, <code>Juli</code>, <code>August</code>,
+   *                          <code>September</code>, <code>Oktober</code>, <code>November</code>, or
+   *                          <code>Dezember</code>.
+   *                          
+   * @return the numeric representation of the specified month.
+   * 
+   * @throws Exception if <code>dateMonthAlphaStr</code> contains an invalid month name.
+   */  
+  private static int convertMonth(String dateMonthAlphaStr) throws Exception
+  {
+    if ("Jänner".equalsIgnoreCase(dateMonthAlphaStr) || "Januar".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.JANUARY;
+    if ("Februar".equalsIgnoreCase(dateMonthAlphaStr) || "Feber".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.FEBRUARY;
+    if ("März".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.MARCH;
+    if ("April".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.APRIL;
+    if ("Mai".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.MAY;
+    if ("Juni".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.JUNE;
+    if ("Juli".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.JULY;
+    if ("August".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.AUGUST;
+    if ("September".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.SEPTEMBER;
+    if ("Oktober".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.OCTOBER;
+    if ("November".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.NOVEMBER;
+    if ("Dezember".equalsIgnoreCase(dateMonthAlphaStr)) return Calendar.DECEMBER;
+    
+    String message = "Invalid month identifier found in attribute \"h-created\":" + dateMonthAlphaStr;
+    logger_.warn(message);
+    throw new Exception(message);
+  }
+
+  /**
+   * Checks wheter a <code>DateTime</code> element exists in the specified MOA <code>
+   * VerifyXMLSignatureRequest</code>.
+   * 
+   * @param moaVerifyXMLSignatureRequest The MOA <code>VerifyXMLSingatureRequest</code>.
+   * 
+   * @return <code>true</code> if the element exists, <code>false</code> otherwhise.
+   * 
+   * @throws ServletException if the check fails for any reason.
+   */
+  private static boolean dateTimeExists(Element moaVerifyXMLSignatureRequest) throws ServletException
+  {
+    String nSPrefixes = Constants.NSPRE_MOA_12_ + " " + Constants.NSURI_MOA_12_;
+    String xPathDateTime = "//" + Constants.NSPRE_MOA_12_ + ":DateTime";
+    
+    NodeList resultNL;
+    try 
+    {
+      XPathUtils utils = new XPathUtils();
+      utils.setupContext(xPathDateTime, moaVerifyXMLSignatureRequest, nSPrefixes);
+      resultNL = utils.selectNodeSet(moaVerifyXMLSignatureRequest);
+    } 
+    catch (Exception e) 
+    {
+      String message = "An error occurred while checking for DateTime element in MOA VerifyXMLSignatureRequest:";
+      logger_.error(message, e);
+      throw new ServletException(message, e);
+    }
+
+    if (resultNL == null) return false;
+    if (resultNL.getLength() < 1) return false;
+    return true;
+  }
+  
+  /**
+   * Checks whether an <code>etsi:SigningTime</code> signed attribute exists as part of the XML signature
+   * contained in the specified MOA <code>VerifyXMLSingatureRequest</code>.
+   * 
+   * @param moaVerifyXMLSignatureRequest The MOA <code>VerifyXMLSingatureRequest</code>.
+   *  
+   * @return <code>true</code>, if the attribute exists, <code>false</code> otherwhise.
+   * 
+   * @throws ServletException if the check fails for any reason.
+   */
+  private static boolean signingTimeExists(Element moaVerifyXMLSignatureRequest) throws ServletException
+  {
+    String nSPrefixes = Constants.NSPRE_ETSI_ + " " + Constants.NSURI_ETSI_;
+    String xPathDateTime = "//" + Constants.NSPRE_ETSI_ + ":SigningTime";
+    
+    NodeList resultNL;
+    try 
+    {
+      XPathUtils utils = new XPathUtils();
+      utils.setupContext(xPathDateTime, moaVerifyXMLSignatureRequest, nSPrefixes);
+      resultNL = utils.selectNodeSet(moaVerifyXMLSignatureRequest);
+    } 
+    catch (Exception e) 
+    {
+      String message = "An error occurred while checking for " + Constants.NSPRE_ETSI_ + ":SigningTime element in XML signature in MOA VerifyXMLSignatureRequest:";
+      logger_.error(message, e);
+      throw new ServletException(message, e);
+    }
+
+    if (resultNL == null) return false;
+    if (resultNL.getLength() < 1) return false;
+    return true;
+  }
 }