Rename folder structure from OpenPGP Keychain to OpenKeychain

6 files changed, 710 insertions, 0 deletions

diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ActionBarHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ActionBarHelper.java
new file mode 100644
index 000000000..a26df556d
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ActionBarHelper.java
@@ -0,0 +1,120 @@
+/*
+ * Copyright (C) 2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.helper;
+
+import android.app.Activity;
+import android.support.v7.app.ActionBar;
+import android.support.v7.app.ActionBarActivity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.View.OnClickListener;
+import android.view.ViewGroup;
+import android.widget.TextView;
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.util.Log;
+
+public class ActionBarHelper {
+
+    /**
+     * Set actionbar without home button if called from another app
+     *
+     * @param activity
+     */
+    public static void setBackButton(ActionBarActivity activity) {
+        final ActionBar actionBar = activity.getSupportActionBar();
+        Log.d(Constants.TAG, "calling package (only set when using startActivityForResult)="
+                + activity.getCallingPackage());
+        if (activity.getCallingPackage() != null
+                && activity.getCallingPackage().equals(Constants.PACKAGE_NAME)) {
+            actionBar.setDisplayHomeAsUpEnabled(true);
+            actionBar.setHomeButtonEnabled(true);
+        } else {
+            actionBar.setDisplayHomeAsUpEnabled(false);
+            actionBar.setHomeButtonEnabled(false);
+        }
+    }
+
+    /**
+     * Sets custom view on ActionBar for Done/Cancel activities
+     *
+     * @param actionBar
+     * @param firstText
+     * @param firstDrawableId
+     * @param firstOnClickListener
+     * @param secondText
+     * @param secondDrawableId
+     * @param secondOnClickListener
+     */
+    public static void setTwoButtonView(ActionBar actionBar,
+                                int firstText, int firstDrawableId, OnClickListener firstOnClickListener,
+                                int secondText, int secondDrawableId, OnClickListener secondOnClickListener) {
+
+        // Inflate the custom action bar view
+        final LayoutInflater inflater = (LayoutInflater) actionBar.getThemedContext()
+                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
+        final View customActionBarView = inflater.inflate(
+                R.layout.actionbar_custom_view_done_cancel, null);
+
+        TextView firstTextView = ((TextView) customActionBarView.findViewById(R.id.actionbar_done_text));
+        firstTextView.setText(firstText);
+        firstTextView.setCompoundDrawablesWithIntrinsicBounds(firstDrawableId, 0, 0, 0);
+        customActionBarView.findViewById(R.id.actionbar_done).setOnClickListener(
+                firstOnClickListener);
+        TextView secondTextView = ((TextView) customActionBarView.findViewById(R.id.actionbar_cancel_text));
+        secondTextView.setText(secondText);
+        secondTextView.setCompoundDrawablesWithIntrinsicBounds(secondDrawableId, 0, 0, 0);
+        customActionBarView.findViewById(R.id.actionbar_cancel).setOnClickListener(
+                secondOnClickListener);
+
+        // Show the custom action bar view and hide the normal Home icon and title.
+        actionBar.setDisplayShowTitleEnabled(false);
+        actionBar.setDisplayShowHomeEnabled(false);
+        actionBar.setDisplayShowCustomEnabled(true);
+        actionBar.setCustomView(customActionBarView, new ActionBar.LayoutParams(
+                ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.MATCH_PARENT));
+    }
+
+    /**
+     * Sets custom view on ActionBar for Done activities
+     *
+     * @param actionBar
+     * @param firstText
+     * @param firstOnClickListener
+     */
+    public static void setOneButtonView(ActionBar actionBar, int firstText, int firstDrawableId,
+                                        OnClickListener firstOnClickListener) {
+        // Inflate a "Done" custom action bar view to serve as the "Up" affordance.
+        final LayoutInflater inflater = (LayoutInflater) actionBar.getThemedContext()
+                .getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
+        final View customActionBarView = inflater
+                .inflate(R.layout.actionbar_custom_view_done, null);
+
+        TextView firstTextView = ((TextView) customActionBarView.findViewById(R.id.actionbar_done_text));
+        firstTextView.setText(firstText);
+        firstTextView.setCompoundDrawablesWithIntrinsicBounds(firstDrawableId, 0, 0, 0);
+        customActionBarView.findViewById(R.id.actionbar_done).setOnClickListener(
+                firstOnClickListener);
+
+        // Show the custom action bar view and hide the normal Home icon and title.
+        actionBar.setDisplayShowTitleEnabled(false);
+        actionBar.setDisplayShowHomeEnabled(false);
+        actionBar.setDisplayShowCustomEnabled(true);
+        actionBar.setCustomView(customActionBarView);
+    }
+}
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ContactHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ContactHelper.java
new file mode 100644
index 000000000..f8ed21816
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ContactHelper.java
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.sufficientlysecure.keychain.helper;
+
+import android.accounts.Account;
+import android.accounts.AccountManager;
+import android.content.Context;
+import android.util.Patterns;
+
+import java.util.ArrayList;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Set;
+
+public class ContactHelper {
+
+    public static final List<String> getMailAccounts(Context context) {
+        final Account[] accounts = AccountManager.get(context).getAccounts();
+        final Set<String> emailSet = new HashSet<String>();
+        for (Account account : accounts) {
+            if (Patterns.EMAIL_ADDRESS.matcher(account.name).matches()) {
+                emailSet.add(account.name);
+            }
+        }
+        return new ArrayList<String>(emailSet);
+    }
+}
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ExportHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ExportHelper.java
new file mode 100644
index 000000000..810f22d8e
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/ExportHelper.java
@@ -0,0 +1,177 @@
+/*
+ * Copyright (C) 2014 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.sufficientlysecure.keychain.helper;
+
+import android.app.ProgressDialog;
+import android.content.DialogInterface;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Bundle;
+import android.os.Handler;
+import android.os.Message;
+import android.os.Messenger;
+import android.support.v7.app.ActionBarActivity;
+import android.widget.Toast;
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.Id;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.compatibility.DialogFragmentWorkaround;
+import org.sufficientlysecure.keychain.provider.ProviderHelper;
+import org.sufficientlysecure.keychain.service.KeychainIntentService;
+import org.sufficientlysecure.keychain.service.KeychainIntentServiceHandler;
+import org.sufficientlysecure.keychain.ui.dialog.DeleteKeyDialogFragment;
+import org.sufficientlysecure.keychain.ui.dialog.FileDialogFragment;
+import org.sufficientlysecure.keychain.util.Log;
+
+public class ExportHelper {
+    protected FileDialogFragment mFileDialog;
+    protected String mExportFilename;
+
+    ActionBarActivity mActivity;
+
+    public ExportHelper(ActionBarActivity activity) {
+        super();
+        this.mActivity = activity;
+    }
+
+    public void deleteKey(Uri dataUri, Handler deleteHandler) {
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(deleteHandler);
+        long masterKeyId = ProviderHelper.getMasterKeyId(mActivity, dataUri);
+
+        DeleteKeyDialogFragment deleteKeyDialog = DeleteKeyDialogFragment.newInstance(messenger,
+                new long[]{ masterKeyId });
+        deleteKeyDialog.show(mActivity.getSupportFragmentManager(), "deleteKeyDialog");
+    }
+
+    /**
+     * Show dialog where to export keys
+     */
+    public void showExportKeysDialog(final long[] masterKeyIds, final String exportFilename,
+                                     final boolean showSecretCheckbox) {
+        mExportFilename = exportFilename;
+
+        // Message is received after file is selected
+        Handler returnHandler = new Handler() {
+            @Override
+            public void handleMessage(Message message) {
+                if (message.what == FileDialogFragment.MESSAGE_OKAY) {
+                    Bundle data = message.getData();
+                    mExportFilename = data.getString(FileDialogFragment.MESSAGE_DATA_FILENAME);
+
+                    exportKeys(masterKeyIds, data.getBoolean(FileDialogFragment.MESSAGE_DATA_CHECKED));
+                }
+            }
+        };
+
+        // Create a new Messenger for the communication back
+        final Messenger messenger = new Messenger(returnHandler);
+
+        DialogFragmentWorkaround.INTERFACE.runnableRunDelayed(new Runnable() {
+            public void run() {
+                String title = null;
+                if (masterKeyIds == null) {
+                    // export all keys
+                    title = mActivity.getString(R.string.title_export_keys);
+                } else {
+                    // export only key specified at data uri
+                    title = mActivity.getString(R.string.title_export_key);
+                }
+
+                String message = mActivity.getString(R.string.specify_file_to_export_to);
+                String checkMsg = showSecretCheckbox ?
+                        mActivity.getString(R.string.also_export_secret_keys) : null;
+
+                mFileDialog = FileDialogFragment.newInstance(messenger, title, message,
+                        exportFilename, checkMsg);
+
+                mFileDialog.show(mActivity.getSupportFragmentManager(), "fileDialog");
+            }
+        });
+    }
+
+    /**
+     * Export keys
+     */
+    public void exportKeys(long[] masterKeyIds, boolean exportSecret) {
+        Log.d(Constants.TAG, "exportKeys started");
+
+        // Send all information needed to service to export key in other thread
+        final Intent intent = new Intent(mActivity, KeychainIntentService.class);
+
+        intent.setAction(KeychainIntentService.ACTION_EXPORT_KEYRING);
+
+        // fill values for this action
+        Bundle data = new Bundle();
+
+        data.putString(KeychainIntentService.EXPORT_FILENAME, mExportFilename);
+        data.putBoolean(KeychainIntentService.EXPORT_SECRET, exportSecret);
+
+        if (masterKeyIds == null) {
+            data.putBoolean(KeychainIntentService.EXPORT_ALL, true);
+        } else {
+            data.putLongArray(KeychainIntentService.EXPORT_KEY_RING_MASTER_KEY_ID, masterKeyIds);
+        }
+
+        intent.putExtra(KeychainIntentService.EXTRA_DATA, data);
+
+        // Message is received after exporting is done in KeychainIntentService
+        KeychainIntentServiceHandler exportHandler = new KeychainIntentServiceHandler(mActivity,
+                mActivity.getString(R.string.progress_exporting),
+                ProgressDialog.STYLE_HORIZONTAL,
+                true,
+                new DialogInterface.OnCancelListener() {
+                                @Override
+                                public void onCancel(DialogInterface dialogInterface) {
+                                    mActivity.stopService(intent);
+                                }
+        }) {
+            public void handleMessage(Message message) {
+                // handle messages by standard KeychainIntentServiceHandler first
+                super.handleMessage(message);
+
+                if (message.arg1 == KeychainIntentServiceHandler.MESSAGE_OKAY) {
+                    // get returned data bundle
+                    Bundle returnData = message.getData();
+
+                    int exported = returnData.getInt(KeychainIntentService.RESULT_EXPORT);
+                    String toastMessage;
+                    if (exported == 1) {
+                        toastMessage = mActivity.getString(R.string.key_exported);
+                    } else if (exported > 0) {
+                        toastMessage = mActivity.getString(R.string.keys_exported, exported);
+                    } else {
+                        toastMessage = mActivity.getString(R.string.no_keys_exported);
+                    }
+                    Toast.makeText(mActivity, toastMessage, Toast.LENGTH_SHORT).show();
+
+                }
+            }
+        };
+
+        // Create a new Messenger for the communication back
+        Messenger messenger = new Messenger(exportHandler);
+        intent.putExtra(KeychainIntentService.EXTRA_MESSENGER, messenger);
+
+        // show progress dialog
+        exportHandler.showProgressDialog(mActivity);
+
+        // start service with intent
+        mActivity.startService(intent);
+    }
+
+}
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/FileHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/FileHelper.java
new file mode 100644
index 000000000..d24aeca52
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/FileHelper.java
@@ -0,0 +1,131 @@
+/*
+ * Copyright (C) 2012-2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.helper;
+
+import android.app.Activity;
+import android.content.ActivityNotFoundException;
+import android.content.Context;
+import android.content.Intent;
+import android.database.Cursor;
+import android.net.Uri;
+import android.os.Environment;
+import android.support.v4.app.Fragment;
+import android.widget.Toast;
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.util.Log;
+
+public class FileHelper {
+
+    /**
+     * Checks if external storage is mounted if file is located on external storage
+     *
+     * @param file
+     * @return true if storage is mounted
+     */
+    public static boolean isStorageMounted(String file) {
+        if (file.startsWith(Environment.getExternalStorageDirectory().getAbsolutePath())) {
+            if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
+    /**
+     * Opens the preferred installed file manager on Android and shows a toast if no manager is
+     * installed.
+     *
+     * @param activity
+     * @param filename    default selected file, not supported by all file managers
+     * @param mimeType    can be text/plain for example
+     * @param requestCode requestCode used to identify the result coming back from file manager to
+     *                    onActivityResult() in your activity
+     */
+    public static void openFile(Activity activity, String filename, String mimeType, int requestCode) {
+        Intent intent = buildFileIntent(filename, mimeType);
+
+        try {
+            activity.startActivityForResult(intent, requestCode);
+        } catch (ActivityNotFoundException e) {
+            // No compatible file manager was found.
+            Toast.makeText(activity, R.string.no_filemanager_installed, Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    public static void openFile(Fragment fragment, String filename, String mimeType, int requestCode) {
+        Intent intent = buildFileIntent(filename, mimeType);
+
+        try {
+            fragment.startActivityForResult(intent, requestCode);
+        } catch (ActivityNotFoundException e) {
+            // No compatible file manager was found.
+            Toast.makeText(fragment.getActivity(), R.string.no_filemanager_installed,
+                    Toast.LENGTH_SHORT).show();
+        }
+    }
+
+    private static Intent buildFileIntent(String filename, String mimeType) {
+        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+        intent.addCategory(Intent.CATEGORY_OPENABLE);
+
+        intent.setData(Uri.parse("file://" + filename));
+        intent.setType(mimeType);
+
+        return intent;
+    }
+
+    /**
+     * Get a file path from a Uri.
+     * <p/>
+     * from https://github.com/iPaulPro/aFileChooser/blob/master/aFileChooser/src/com/ipaulpro/
+     * afilechooser/utils/FileUtils.java
+     *
+     * @param context
+     * @param uri
+     * @return
+     * @author paulburke
+     */
+    public static String getPath(Context context, Uri uri) {
+        Log.d(Constants.TAG + " File -",
+                "Authority: " + uri.getAuthority() + ", Fragment: " + uri.getFragment()
+                        + ", Port: " + uri.getPort() + ", Query: " + uri.getQuery() + ", Scheme: "
+                        + uri.getScheme() + ", Host: " + uri.getHost() + ", Segments: "
+                        + uri.getPathSegments().toString());
+
+        if ("content".equalsIgnoreCase(uri.getScheme())) {
+            String[] projection = {"_data"};
+            Cursor cursor = null;
+
+            try {
+                cursor = context.getContentResolver().query(uri, projection, null, null, null);
+                int columnIndex = cursor.getColumnIndexOrThrow("_data");
+                if (cursor.moveToFirst()) {
+                    return cursor.getString(columnIndex);
+                }
+            } catch (Exception e) {
+                // Eat it
+            }
+        } else if ("file".equalsIgnoreCase(uri.getScheme())) {
+            return uri.getPath();
+        }
+
+        return null;
+    }
+}
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java
new file mode 100644
index 000000000..b31a889f0
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/OtherHelper.java
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2012-2013 Dominik Schürmann <dominik@dominikschuermann.de>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package org.sufficientlysecure.keychain.helper;
+
+import android.os.Bundle;
+import android.text.SpannableStringBuilder;
+import android.text.Spanned;
+
+import android.text.style.StrikethroughSpan;
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.util.Log;
+
+import java.util.Iterator;
+import java.util.Set;
+
+public class OtherHelper {
+
+    /**
+     * Logs bundle content to debug for inspecting the content
+     *
+     * @param bundle
+     * @param bundleName
+     */
+    public static void logDebugBundle(Bundle bundle, String bundleName) {
+        if (Constants.DEBUG) {
+            if (bundle != null) {
+                Set<String> ks = bundle.keySet();
+                Iterator<String> iterator = ks.iterator();
+
+                Log.d(Constants.TAG, "Bundle " + bundleName + ":");
+                Log.d(Constants.TAG, "------------------------------");
+                while (iterator.hasNext()) {
+                    String key = iterator.next();
+                    Object value = bundle.get(key);
+
+                    if (value != null) {
+                        Log.d(Constants.TAG, key + " : " + value.toString());
+                    } else {
+                        Log.d(Constants.TAG, key + " : null");
+                    }
+                }
+                Log.d(Constants.TAG, "------------------------------");
+            } else {
+                Log.d(Constants.TAG, "Bundle " + bundleName + ": null");
+            }
+        }
+    }
+
+    public static SpannableStringBuilder strikeOutText(CharSequence text) {
+        SpannableStringBuilder sb = new SpannableStringBuilder(text);
+        sb.setSpan(new StrikethroughSpan(), 0, text.length(), Spanned.SPAN_INCLUSIVE_INCLUSIVE);
+        return sb;
+    }
+
+}
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/Preferences.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/Preferences.java
new file mode 100644
index 000000000..ca5555fea
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/helper/Preferences.java
@@ -0,0 +1,171 @@
+/*
+ * Copyright (C) 2012 Dominik Schürmann <dominik@dominikschuermann.de>
+ * Copyright (C) 2010 Thialfihar <thi@thialfihar.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.sufficientlysecure.keychain.helper;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import org.spongycastle.bcpg.HashAlgorithmTags;
+import org.spongycastle.openpgp.PGPEncryptedData;
+import org.sufficientlysecure.keychain.Constants;
+import org.sufficientlysecure.keychain.Id;
+
+import java.util.Vector;
+
+/**
+ * Singleton Implementation of a Preference Helper
+ */
+public class Preferences {
+    private static Preferences sPreferences;
+    private SharedPreferences mSharedPreferences;
+
+    public static synchronized Preferences getPreferences(Context context) {
+        return getPreferences(context, false);
+    }
+
+    public static synchronized Preferences getPreferences(Context context, boolean forceNew) {
+        if (sPreferences == null || forceNew) {
+            sPreferences = new Preferences(context);
+        }
+        return sPreferences;
+    }
+
+    private Preferences(Context context) {
+        mSharedPreferences = context.getSharedPreferences("APG.main", Context.MODE_PRIVATE);
+    }
+
+    public String getLanguage() {
+        return mSharedPreferences.getString(Constants.Pref.LANGUAGE, "");
+    }
+
+    public void setLanguage(String value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putString(Constants.Pref.LANGUAGE, value);
+        editor.commit();
+    }
+
+    public long getPassphraseCacheTtl() {
+        int ttl = mSharedPreferences.getInt(Constants.Pref.PASSPHRASE_CACHE_TTL, 180);
+        // fix the value if it was set to "never" in previous versions, which currently is not
+        // supported
+        if (ttl == 0) {
+            ttl = 180;
+        }
+        return (long) ttl;
+    }
+
+    public void setPassphraseCacheTtl(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.Pref.PASSPHRASE_CACHE_TTL, value);
+        editor.commit();
+    }
+
+    public int getDefaultEncryptionAlgorithm() {
+        return mSharedPreferences.getInt(Constants.Pref.DEFAULT_ENCRYPTION_ALGORITHM,
+                PGPEncryptedData.AES_256);
+    }
+
+    public void setDefaultEncryptionAlgorithm(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.Pref.DEFAULT_ENCRYPTION_ALGORITHM, value);
+        editor.commit();
+    }
+
+    public int getDefaultHashAlgorithm() {
+        return mSharedPreferences.getInt(Constants.Pref.DEFAULT_HASH_ALGORITHM,
+                HashAlgorithmTags.SHA512);
+    }
+
+    public void setDefaultHashAlgorithm(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.Pref.DEFAULT_HASH_ALGORITHM, value);
+        editor.commit();
+    }
+
+    public int getDefaultMessageCompression() {
+        return mSharedPreferences.getInt(Constants.Pref.DEFAULT_MESSAGE_COMPRESSION,
+                Id.choice.compression.zlib);
+    }
+
+    public void setDefaultMessageCompression(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.Pref.DEFAULT_MESSAGE_COMPRESSION, value);
+        editor.commit();
+    }
+
+    public int getDefaultFileCompression() {
+        return mSharedPreferences.getInt(Constants.Pref.DEFAULT_FILE_COMPRESSION,
+                Id.choice.compression.none);
+    }
+
+    public void setDefaultFileCompression(int value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putInt(Constants.Pref.DEFAULT_FILE_COMPRESSION, value);
+        editor.commit();
+    }
+
+    public boolean getDefaultAsciiArmor() {
+        return mSharedPreferences.getBoolean(Constants.Pref.DEFAULT_ASCII_ARMOR, false);
+    }
+
+    public void setDefaultAsciiArmor(boolean value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putBoolean(Constants.Pref.DEFAULT_ASCII_ARMOR, value);
+        editor.commit();
+    }
+
+    public boolean getForceV3Signatures() {
+        return mSharedPreferences.getBoolean(Constants.Pref.FORCE_V3_SIGNATURES, false);
+    }
+
+    public void setForceV3Signatures(boolean value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        editor.putBoolean(Constants.Pref.FORCE_V3_SIGNATURES, value);
+        editor.commit();
+    }
+
+    public String[] getKeyServers() {
+        String rawData = mSharedPreferences.getString(Constants.Pref.KEY_SERVERS,
+                Constants.Defaults.KEY_SERVERS);
+        Vector<String> servers = new Vector<String>();
+        String chunks[] = rawData.split(",");
+        for (String c : chunks) {
+            String tmp = c.trim();
+            if (tmp.length() > 0) {
+                servers.add(tmp);
+            }
+        }
+        return servers.toArray(chunks);
+    }
+
+    public void setKeyServers(String[] value) {
+        SharedPreferences.Editor editor = mSharedPreferences.edit();
+        String rawData = "";
+        for (String v : value) {
+            String tmp = v.trim();
+            if (tmp.length() == 0) {
+                continue;
+            }
+            if (!"".equals(rawData)) {
+                rawData += ",";
+            }
+            rawData += tmp;
+        }
+        editor.putString(Constants.Pref.KEY_SERVERS, rawData);
+        editor.commit();
+    }
+}