1 files changed, 121 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/NfcOperationActivity.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/NfcOperationActivity.java
new file mode 100644
index 000000000..aa66053fa
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/NfcOperationActivity.java
@@ -0,0 +1,121 @@
+/**
+ * Copyright (c) 2013-2014 Philipp Jakubeit, Signe Rüsch, Dominik Schürmann
+ *
+ * Licensed under the Bouncy Castle License (MIT license). See LICENSE file for details.
+ */
+
+package org.sufficientlysecure.keychain.ui;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.WindowManager;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.remote.CryptoInputParcelCacheService;
+import org.sufficientlysecure.keychain.service.PassphraseCacheService;
+import org.sufficientlysecure.keychain.service.input.CryptoInputParcel;
+import org.sufficientlysecure.keychain.service.input.RequiredInputParcel;
+import org.sufficientlysecure.keychain.ui.base.BaseNfcActivity;
+import org.sufficientlysecure.keychain.util.Log;
+import org.sufficientlysecure.keychain.util.Preferences;
+
+import java.io.IOException;
+
+/**
+ * This class provides a communication interface to OpenPGP applications on ISO SmartCard compliant
+ * NFC devices.
+ * <p/>
+ * For the full specs, see http://g10code.com/docs/openpgp-card-2.0.pdf
+ */
+public class NfcOperationActivity extends BaseNfcActivity {
+
+    public static final String EXTRA_REQUIRED_INPUT = "required_input";
+
+    // passthrough for OpenPgpService
+    public static final String EXTRA_SERVICE_INTENT = "data";
+
+    public static final String RESULT_DATA = "result_data";
+
+    private RequiredInputParcel mRequiredInput;
+    private Intent mServiceIntent;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        Log.d(Constants.TAG, "NfcOperationActivity.onCreate");
+
+        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
+
+        Intent intent = getIntent();
+        Bundle data = intent.getExtras();
+
+        mRequiredInput = data.getParcelable(EXTRA_REQUIRED_INPUT);
+        mServiceIntent = data.getParcelable(EXTRA_SERVICE_INTENT);
+
+        // obtain passphrase for this subkey
+        obtainYubiKeyPin(RequiredInputParcel.createRequiredPassphrase(mRequiredInput));
+    }
+
+    @Override
+    protected void initLayout() {
+        setContentView(R.layout.nfc_activity);
+    }
+
+    @Override
+    protected void onNfcPerform() throws IOException {
+
+        CryptoInputParcel inputParcel = new CryptoInputParcel(mRequiredInput.mSignatureTime);
+
+        switch (mRequiredInput.mType) {
+            case NFC_DECRYPT: {
+                for (int i = 0; i < mRequiredInput.mInputHashes.length; i++) {
+                    byte[] hash = mRequiredInput.mInputHashes[i];
+                    byte[] decryptedSessionKey = nfcDecryptSessionKey(hash);
+                    inputParcel.addCryptoData(hash, decryptedSessionKey);
+                }
+                break;
+            }
+            case NFC_SIGN: {
+                for (int i = 0; i < mRequiredInput.mInputHashes.length; i++) {
+                    byte[] hash = mRequiredInput.mInputHashes[i];
+                    int algo = mRequiredInput.mSignAlgos[i];
+                    byte[] signedHash = nfcCalculateSignature(hash, algo);
+                    inputParcel.addCryptoData(hash, signedHash);
+                }
+                break;
+            }
+        }
+
+        if (mServiceIntent != null) {
+            CryptoInputParcelCacheService.addCryptoInputParcel(this, mServiceIntent, inputParcel);
+            setResult(RESULT_OK, mServiceIntent);
+        } else {
+            Intent result = new Intent();
+            result.putExtra(NfcOperationActivity.RESULT_DATA, inputParcel);
+            setResult(RESULT_OK, result);
+        }
+
+        finish();
+    }
+
+    @Override
+    public void handlePinError() {
+
+        // avoid a loop
+        Preferences prefs = Preferences.getPreferences(this);
+        if (prefs.useDefaultYubiKeyPin()) {
+            toast(getString(R.string.error_pin_nodefault));
+            setResult(RESULT_CANCELED);
+            finish();
+            return;
+        }
+
+        // clear (invalid) passphrase
+        PassphraseCacheService.clearCachedPassphrase(
+                this, mRequiredInput.getMasterKeyId(), mRequiredInput.getSubKeyId());
+
+        obtainYubiKeyPin(RequiredInputParcel.createRequiredPassphrase(mRequiredInput));
+    }
+
+}