Crypto Provider implementation start

2013-05-28 15:10:36 +02:00
parent 8c537d3367
commit b221c0c905
23 changed files with 1492 additions and 86 deletions
--- a/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/crypto_provider/CryptoActivity.java
+++ b/OpenPGP-Keychain/src/org/sufficientlysecure/keychain/crypto_provider/CryptoActivity.java
@@ -0,0 +1,92 @@
+package org.sufficientlysecure.keychain.crypto_provider;
+
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.Id;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.helper.PgpMain;
+import org.sufficientlysecure.keychain.provider.ProviderHelper;
+import org.sufficientlysecure.keychain.ui.dialog.PassphraseDialogFragment;
+import org.sufficientlysecure.keychain.util.Log;
+
+import com.actionbarsherlock.app.SherlockFragmentActivity;
+
+import android.app.Activity;
+import android.content.Intent;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Messenger;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.widget.Button;
+
+public class CryptoActivity extends SherlockFragmentActivity {
+
+    public static final String ACTION_CACHE_PASSPHRASE = "org.sufficientlysecure.keychain.CRYPTO_CACHE_PASSPHRASE";
+
+    public static final String EXTRA_SECRET_KEY_ID = "secret_key_id";
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        handleActions(getIntent());
+    }
+
+    protected void handleActions(Intent intent) {
+
+        // TODO: Important: Check if calling package is in list!
+
+        String action = intent.getAction();
+        Bundle extras = intent.getExtras();
+
+        if (extras == null) {
+            extras = new Bundle();
+        }
+
+        /**
+         * com.android.crypto actions
+         */
+        if (ACTION_CACHE_PASSPHRASE.equals(action)) {
+            long secretKeyId = extras.getLong(EXTRA_SECRET_KEY_ID);
+
+            showPassphraseDialog(secretKeyId);
+        } else {
+            Log.e(Constants.TAG, "Wrong action!");
+            setResult(RESULT_CANCELED);
+            finish();
+        }
+    }
+
+    /**
+     * Shows passphrase dialog to cache a new passphrase the user enters for using it later for
+     * encryption. Based on mSecretKeyId it asks for a passphrase to open a private key or it asks
+     * for a symmetric passphrase
+     */
+    private void showPassphraseDialog(long secretKeyId) {
+        // Message is received after passphrase is cached
+        Handler returnHandler = new Handler() {
+            @Override
+            public void handleMessage(Message message) {
+                if (message.what == PassphraseDialogFragment.MESSAGE_OKAY) {
+                    setResult(RESULT_OK);
+                    finish();
+                }
+            }
+        };
+
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(returnHandler);
+
+        try {
+            PassphraseDialogFragment passphraseDialog = PassphraseDialogFragment.newInstance(this,
+                    messenger, secretKeyId);
+
+            passphraseDialog.show(getSupportFragmentManager(), "passphraseDialog");
+        } catch (PgpMain.PgpGeneralException e) {
+            Log.d(Constants.TAG, "No passphrase for this secret key, encrypt directly!");
+            // send message to handler to start encryption directly
+            returnHandler.sendEmptyMessage(PassphraseDialogFragment.MESSAGE_OKAY);
+        }
+    }
+}