src/de/j32/avmfritz/LoginXML.java

   1 package de.j32.avmfritz;
   2
   3 import java.io.IOException;
   4 import java.io.InputStream;
   5 import java.io.UnsupportedEncodingException;
   6 import java.security.MessageDigest;
   7 import java.security.NoSuchAlgorithmException;
   8
   9 import javax.xml.bind.annotation.adapters.HexBinaryAdapter;
  10
  11 import org.w3c.dom.Document;
  12 import org.xml.sax.SAXException;
  13
  14 import de.j32.util.Util;
  15 import de.j32.util.XmlUtil;
  16
  17 public class LoginXML
  18 {
  19         Document xml_;
  20
  21         public LoginXML(InputStream is)
  22                 throws SAXException, IOException
  23         {
  24                 xml_ = XmlUtil.parse(is);
  25         }
  26
  27         public boolean iswriteaccess()
  28                 throws SAXException
  29         {
  30                 try {
  31                         return xml_.getElementsByTagName("iswriteaccess").item(0).getTextContent().equals("1");
  32                 }
  33                 catch (NullPointerException e) {
  34                         throw new SAXException();
  35                 }
  36         }
  37
  38         public String sid()
  39                 throws SAXException
  40         {
  41                 try {
  42                         return Util.nonnull(xml_.getElementsByTagName("SID").item(0).getTextContent());
  43                 }
  44                 catch (NullPointerException e) {
  45                         throw new SAXException();
  46                 }
  47         }
  48
  49         public String challenge()
  50                 throws SAXException
  51         {
  52                 try {
  53                         return Util.nonnull(xml_.getElementsByTagName("Challenge").item(0).getTextContent());
  54                 }
  55                 catch (NullPointerException e) {
  56                         throw new SAXException();
  57                 }
  58         }
  59
  60         public String response(String password)
  61                 throws SAXException
  62         {
  63                 try {
  64                         String c = challenge();
  65                         MessageDigest md = MessageDigest.getInstance("MD5");
  66                         md.update((c + "-" + password).getBytes("UTF-16LE"));
  67                         return c + "-" + new HexBinaryAdapter().marshal(md.digest()).toLowerCase();
  68                 } catch (NoSuchAlgorithmException e) {
  69                         throw new AssertionError("missing MD5 implementation");
  70                 } catch (UnsupportedEncodingException e) {
  71                         throw new AssertionError("missing UTF-16LE encoding");
  72                 }
  73         }
  74 }