X-Git-Url: http://www.average.org/gitweb/?p=YkNeoCR.git;a=blobdiff_plain;f=src%2Forg%2Faverage%2Fnfcauthcr%2FCheck.java;fp=src%2Forg%2Faverage%2Fnfcauthcr%2FCheck.java;h=c3738f7fc4f80dbe2c799925d522beaa0ea62153;hp=0000000000000000000000000000000000000000;hb=a0d60dab1717e69b6d853eb91d0065fe378e3c28;hpb=bdfe828f712fa2a187a424923c6594f12e965a5d

diff --git a/src/org/average/nfcauthcr/Check.java b/src/org/average/nfcauthcr/Check.java
new file mode 100644
index 0000000..c3738f7
--- /dev/null
+++ b/src/org/average/nfcauthcr/Check.java
@@ -0,0 +1,122 @@
+package org.average.nfcauthcr;
+
+import android.app.Activity;
+import android.app.AlertDialog;
+import android.app.PendingIntent;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.content.IntentFilter;
+import android.nfc.NfcAdapter;
+import android.nfc.Tag;
+import android.nfc.TagLostException;
+import android.nfc.tech.IsoDep;
+import android.util.Log;
+import android.widget.Toast;
+
+import org.average.nfcauthcr.YkNeo;
+
+public class Check extends Activity {
+
+	private final String TAG = getClass().getName();
+
+	private AlertDialog swipeDialog;
+	private PendingIntent tagIntent;
+
+	@Override
+	protected void onResume() {
+		super.onResume();
+		Log.v(TAG, "Starting the work");
+
+		Intent intent = getIntent();
+		setResult(RESULT_CANCELED);
+		if (swipeDialog != null) {
+			swipeDialog.dismiss();
+			swipeDialog = null;
+		}
+		int slot = intent.getIntExtra("slot", -1);
+		if (slot > 0) {
+			swipeDialog = makeDialog();
+			swipeDialog.show();
+			enableDispatch(slot);
+		}
+	}
+
+	@Override
+	protected void onPause() {
+		super.onPause();
+		Log.v(TAG, "Finished the work");
+
+		if(swipeDialog != null) {
+			swipeDialog.dismiss();
+			swipeDialog = null;
+		}
+		disableDispatch();
+	}
+
+	public void onNewIntent(Intent intent) {
+		Log.v(TAG, "NFC Intent arrived");
+		int slot = intent.getIntExtra("slot", -1);
+		byte[] challenge = intent.getByteArrayExtra("challenge");
+		if (slot <= 0) return;
+		Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
+		if (tag == null) return;
+		IsoDep isoTag = IsoDep.get(tag);
+		byte[] response = YkNeo.doChallengeYubiKey(
+						isoTag, slot, challenge);
+		if (response != null) {
+			Intent data = getIntent();
+			data.putExtra("response", response);
+			setResult(RESULT_OK, data);
+		}
+		finish();
+	}
+
+	private AlertDialog makeDialog() {
+		AlertDialog.Builder builder = new AlertDialog.Builder(this);
+		builder.setTitle(R.string.challenging);
+		builder.setMessage(R.string.swipe);
+		builder.setOnCancelListener(
+				new DialogInterface.OnCancelListener() {
+			public void onCancel(DialogInterface dialog) {
+				finish();
+			}
+		});
+		return builder.create();
+	}
+
+	private void enableDispatch(int slot) {
+		Intent intent = getIntent();
+		intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
+		intent.putExtra("slot", slot);
+		tagIntent = PendingIntent.getActivity(this, 0, intent, 0);
+		IntentFilter iso =
+			new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);
+		NfcAdapter adapter = NfcAdapter.getDefaultAdapter(this);
+		if (adapter == null) {
+			Toast.makeText(this, R.string.no_nfc,
+						Toast.LENGTH_LONG).show();
+			finish();
+			return;
+		}
+		if (! adapter.isEnabled()) {
+			Toast.makeText(this, R.string.nfc_disabled,
+						Toast.LENGTH_LONG).show();
+			finish();
+			return;
+		}
+		adapter.enableForegroundDispatch(
+			this, tagIntent, new IntentFilter[] {iso},
+			new String[][] {new String[] {IsoDep.class.getName()}});
+	}
+
+	private void disableDispatch() {
+		if (tagIntent != null) {
+			tagIntent.cancel();
+			tagIntent = null;
+		}
+		NfcAdapter adapter = NfcAdapter.getDefaultAdapter(this);
+		if (adapter != null) {
+			adapter.disableForegroundDispatch(this);
+		}
+	}
+}