src/org/average/nfcauthcr/NfcCRdispatch.java

   1 package org.average.nfcauthcr;
   2
   3 import android.app.Activity;
   4 import android.app.PendingIntent;
   5 import android.content.Intent;
   6 import android.content.IntentFilter;
   7 import android.nfc.NfcAdapter;
   8 import android.nfc.Tag;
   9 import android.nfc.TagLostException;
  10 import android.nfc.tech.IsoDep;
  11 import android.util.Log;
  12 import android.widget.Toast;
  13
  14 import org.average.nfcauthcr.YkNeo;
  15 import org.average.nfcauthcr.CRException;
  16
  17 public class NfcCRdispatch {
  18
  19         private final String TAG = getClass().getName();
  20
  21         private Activity activity = null;
  22         private PendingIntent tagIntent = null;
  23         private byte[] challenge;
  24
  25         NfcCRdispatch(Activity activity) {
  26                 Log.v(TAG, "new NfcCRdispatch, activity=" + activity);
  27                 this.activity = activity;
  28         }
  29
  30         public byte[] onNewIntent(Intent intent) {
  31                 Log.v(TAG, "NFC Intent arrived");
  32                 Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
  33                 if (tag == null) return null;
  34                 IsoDep isoTag = IsoDep.get(tag);
  35                 try {
  36                         int slot = intent.getIntExtra("yubikey_neo_slot", -1);
  37                         return YkNeo.doChalResp(isoTag, slot, challenge);
  38                 } catch (CRException e) {
  39                         Log.v(TAG, e.getMessage());
  40                         Toast.makeText(activity, e.getMessage(),
  41                                         Toast.LENGTH_LONG).show();
  42                         return null;
  43                 }
  44         }
  45
  46         public void onResume(byte[] challenge) {
  47                 this.challenge = challenge;
  48                 Intent intent = activity.getIntent();
  49                 intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
  50                 tagIntent = PendingIntent.getActivity(activity, 0, intent, 0);
  51                 IntentFilter iso =
  52                         new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);
  53                 String[] techs =
  54                         new String[] {IsoDep.class.getName()};
  55                 NfcAdapter adapter = NfcAdapter.getDefaultAdapter(activity);
  56                 if (adapter == null) {
  57                         Toast.makeText(activity, R.string.no_nfc,
  58                                                 Toast.LENGTH_LONG).show();
  59                         return;
  60                 }
  61                 if (!adapter.isEnabled()) {
  62                         Toast.makeText(activity, R.string.nfc_disabled,
  63                                                 Toast.LENGTH_LONG).show();
  64                         return;
  65                 }
  66                 adapter.enableForegroundDispatch(activity, tagIntent,
  67                                         new IntentFilter[] {iso},
  68                                         new String[][] {techs});
  69         }
  70
  71         public void onPause() {
  72                 if (tagIntent != null) {
  73                         tagIntent.cancel();
  74                         tagIntent = null;
  75                 }
  76                 NfcAdapter adapter = NfcAdapter.getDefaultAdapter(activity);
  77                 if (adapter != null) {
  78                         adapter.disableForegroundDispatch(activity);
  79                 }
  80         }
  81 }