src/org/average/nfcauthcr/Check.java

   1 package org.average.nfcauthcr;
   2
   3 import android.app.Activity;
   4 import android.app.AlertDialog;
   5 import android.app.PendingIntent;
   6 import android.content.DialogInterface;
   7 import android.content.Intent;
   8 import android.content.IntentFilter;
   9 import android.nfc.NfcAdapter;
  10 import android.nfc.Tag;
  11 import android.nfc.TagLostException;
  12 import android.nfc.tech.IsoDep;
  13 import android.util.Log;
  14 import android.widget.Toast;
  15
  16 import org.average.nfcauthcr.YkNeo;
  17 import org.average.nfcauthcr.CRException;
  18
  19 public class Check extends Activity {
  20
  21         private final String TAG = getClass().getName();
  22
  23         private PendingIntent tagIntent;
  24
  25         @Override
  26         protected void onResume() {
  27                 super.onResume();
  28                 Log.v(TAG, "Starting the work");
  29
  30                 Intent intent = getIntent();
  31                 setResult(RESULT_CANCELED);
  32                 int slot = intent.getIntExtra("slot", -1);
  33                 if (slot > 0) {
  34                         enableDispatch(slot);
  35                 }
  36         }
  37
  38         @Override
  39         protected void onPause() {
  40                 super.onPause();
  41                 Log.v(TAG, "Finished the work");
  42
  43                 disableDispatch();
  44         }
  45
  46         public void onNewIntent(Intent intent) {
  47                 Log.v(TAG, "NFC Intent arrived");
  48                 int slot = intent.getIntExtra("slot", -1);
  49                 byte[] challenge = intent.getByteArrayExtra("challenge");
  50                 if (slot <= 0) return;
  51                 Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
  52                 if (tag == null) return;
  53                 IsoDep isoTag = IsoDep.get(tag);
  54                 try {
  55                         byte[] response = YkNeo.doChallengeYubiKey(
  56                                                 isoTag, slot, challenge);
  57                         Intent data = getIntent();
  58                         data.putExtra("response", response);
  59                         setResult(RESULT_OK, data);
  60                 } catch (CRException e) {
  61                         Log.v(TAG, e.getMessage());
  62                         Toast.makeText(this, e.getMessage(),
  63                                         Toast.LENGTH_LONG).show();
  64                 }
  65                 finish();
  66         }
  67
  68 /*
  69 <receiver android:name=".IsoDepReceiver"
  70           android:label="IsoDepReceiver">
  71      <intent-filter>
  72          <action android:name="android.nfc.action.TECH_DISCOVERED" />
  73      </intent-filter>
  74
  75      <meta-data android:name="android.nfc.action.TECH_DISCOVERED"
  76          android:resource="@xml/filter_nfc"
  77      />
  78  </receiver>
  79
  80 <resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
  81      <!-- capture anything using IsoDep -->
  82      <tech-list>
  83          <tech>android.nfc.tech.IsoDep</tech>
  84      </tech-list>
  85  </resources>
  86
  87 */
  88
  89         private void enableDispatch(int slot) {
  90                 Intent intent = getIntent();
  91                 intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
  92                 intent.putExtra("slot", slot);
  93                 tagIntent = PendingIntent.getActivity(this, 0, intent, 0);
  94                 IntentFilter iso =
  95                         new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);
  96                 NfcAdapter adapter = NfcAdapter.getDefaultAdapter(this);
  97                 if (adapter == null) {
  98                         Toast.makeText(this, R.string.no_nfc,
  99                                                 Toast.LENGTH_LONG).show();
 100                         finish();
 101                 }
 102                 if (! adapter.isEnabled()) {
 103                         Toast.makeText(this, R.string.nfc_disabled,
 104                                                 Toast.LENGTH_LONG).show();
 105                         finish();
 106                 }
 107                 adapter.enableForegroundDispatch(
 108                         this, tagIntent, new IntentFilter[] {iso},
 109                         new String[][] {new String[] {IsoDep.class.getName()}});
 110         }
 111
 112         private void disableDispatch() {
 113                 if (tagIntent != null) {
 114                         tagIntent.cancel();
 115                         tagIntent = null;
 116                 }
 117                 NfcAdapter adapter = NfcAdapter.getDefaultAdapter(this);
 118                 if (adapter != null) {
 119                         adapter.disableForegroundDispatch(this);
 120                 }
 121         }
 122 }