/*
 * Created on 27.11.2003
 *
 * (c) Stabsstelle IKT-Strategie des Bundes
 */
package at.gv.egovernment.moa.spss.slinterface.beans;

import iaik.asn1.ObjectID;
import iaik.asn1.structures.Name;
import iaik.utils.RFC2253NameParser;
import iaik.utils.RFC2253NameParserException;

import org.w3c.dom.Document;
import org.w3c.dom.Element;

import at.gv.egovernment.moa.spss.slinterface.Constants;
import at.gv.egovernment.moa.spss.slinterface.DOMUtils;

/**
 * @author Gregor Karlinger (mailto:gregor.karlinger@cio.gv.at) 
 */
public class SignerInfoBean
{
  private static final String SIGNERINFO_ELEM_ = "SignerInfo";
  private static final String X509DATA_ELEM_ = "X509Data";
  private static final String X509SUBJNAME_ELEM_ = "X509SubjectName";
  private static final String X509ISSUERSERIAL_ELEM_ = "X509IssuerSerial";
  private static final String SERIAL_ELEM_ = "X509SerialNumber";
  private static final String ISSUER_ELEM_ = "X509IssuerName";
  private static final String QUALCERT_ELEM_ = "QualifiedCertificate";

  private Element signerInfoElem_;
  
  private String subjectNameItemSel_;
  private String issuerNameItemSel_;

  /* ---------------------------------------------------------------------------------------------------- */

  public SignerInfoBean(Document slResponseDoc)
  {
    Element verifyXMLResponseElem = slResponseDoc.getDocumentElement();
    signerInfoElem_ = DOMUtils.getChildElem(
      verifyXMLResponseElem, Constants.NSURI_SL_11_, SIGNERINFO_ELEM_);
      
    subjectNameItemSel_ = "2.5.4.3";  
    issuerNameItemSel_ = "2.5.4.3";  
  }

  /* ---------------------------------------------------------------------------------------------------- */

  public void setSubjectNameItemSel(String selector)
  {
    subjectNameItemSel_ = selector;
  }

  /* ---------------------------------------------------------------------------------------------------- */
  
  public String getSubjectNameItem()
  {
    Element x509DataElem = DOMUtils.getChildElem(signerInfoElem_, Constants.NSURI_DSIG_, X509DATA_ELEM_);
    String subjectNameStr = DOMUtils.getChildText(x509DataElem, Constants.NSURI_DSIG_, X509SUBJNAME_ELEM_);
    if (subjectNameStr == null) return null;
    return getRDN(subjectNameStr, subjectNameItemSel_);
  }

  /* ---------------------------------------------------------------------------------------------------- */

  public String getSerial()
  {
    Element x509DataElem = DOMUtils.getChildElem(signerInfoElem_, Constants.NSURI_DSIG_, X509DATA_ELEM_);
    Element iSElem = DOMUtils.getChildElem(x509DataElem, Constants.NSURI_DSIG_, X509ISSUERSERIAL_ELEM_);
    return DOMUtils.getChildText(iSElem, Constants.NSURI_DSIG_, SERIAL_ELEM_); 
  }

  /* ---------------------------------------------------------------------------------------------------- */

  public void setIssuerNameItemSel(String selector)
  {
    issuerNameItemSel_ = selector; 
  }
  
  /* ---------------------------------------------------------------------------------------------------- */
  
  public String getIssuerNameItem()
  {
    Element x509DataElem = DOMUtils.getChildElem(signerInfoElem_, Constants.NSURI_DSIG_, X509DATA_ELEM_);
    Element iSElem = DOMUtils.getChildElem(x509DataElem, Constants.NSURI_DSIG_, X509ISSUERSERIAL_ELEM_);
    String issuerNameStr = DOMUtils.getChildText(iSElem, Constants.NSURI_DSIG_, ISSUER_ELEM_);
    if (issuerNameStr == null) return null;
    return getRDN(issuerNameStr, issuerNameItemSel_);
  }

  /* ---------------------------------------------------------------------------------------------------- */

  public boolean getIsQualified()
  {
    Element x509DataElem = DOMUtils.getChildElem(signerInfoElem_, Constants.NSURI_DSIG_, X509DATA_ELEM_);
    Element qCElem = DOMUtils.getChildElem(x509DataElem, Constants.NSURI_SL_11_, QUALCERT_ELEM_);
    return (qCElem != null);
  }
  
  /* ---------------------------------------------------------------------------------------------------- */

  private String getRDN(String nameStr, String oidStr)
  {
    try
    {
      RFC2253NameParser nameParser = new RFC2253NameParser(nameStr);
      Name name = nameParser.parse();
      ObjectID oid = ObjectID.getObjectID(oidStr);
      if (oid == null) return null;
      String[] rdns = name.getRDNs(oid);
      if (rdns == null) return null;
      StringBuffer rdnsStr = new StringBuffer();
      for (int i = 0; i < rdns.length; i++)
      {
        if (i > 0) rdnsStr.append(", ");
        rdnsStr.append(rdns[i]);
      }
      return rdnsStr.toString();
    }
    catch (RFC2253NameParserException e)
    {
      return null;
    }
  }
}