add remember passphrase and clearing it from settings

app/src/main/java/com/zeapo/pwdstore/UserPreference.kt

@@ -74,6 +74,11 @@ class UserPreference : AppCompatActivity() {
                 true
             }
 
+            findPreference("ssh_key_clear_passphrase").onPreferenceClickListener = Preference.OnPreferenceClickListener {
+                sharedPreferences.edit().putString("ssh_key_passphrase", null).apply()
+                it.isEnabled = false
+                true
+            }
 
             findPreference("git_server_info").onPreferenceClickListener = Preference.OnPreferenceClickListener {
                 val intent = Intent(callingActivity, GitActivity::class.java)
@@ -155,6 +160,7 @@ class UserPreference : AppCompatActivity() {
             findPreference("pref_select_external").summary = preferenceManager.sharedPreferences.getString("git_external_repo", getString(R.string.no_repo_selected))
             findPreference("ssh_see_key").isEnabled = sharedPreferences.getBoolean("use_generated_key", false)
             findPreference("git_delete_repo").isEnabled = !sharedPreferences.getBoolean("git_external", false)
+            findPreference("ssh_key_clear_passphrase").isEnabled = sharedPreferences.getString("ssh_key_passphrase", null)?.isNotEmpty() ?: false
             val keyPref = findPreference("openpgp_key_id_pref")
             val selectedKeys: Array<String> = ArrayList<String>(sharedPreferences.getStringSet("openpgp_key_ids_set", HashSet<String>())).toTypedArray()
             if (selectedKeys.isEmpty()) {

app/src/main/java/com/zeapo/pwdstore/git/GitOperation.java

@@ -1,11 +1,17 @@
 package com.zeapo.pwdstore.git;
 
+import android.annotation.SuppressLint;
 import android.app.Activity;
 import android.content.DialogInterface;
 import android.content.Intent;
+import android.content.SharedPreferences;
+import android.preference.PreferenceManager;
 import android.support.annotation.Nullable;
 import android.support.v7.app.AlertDialog;
 import android.text.InputType;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.widget.CheckBox;
 import android.widget.EditText;
 import android.widget.LinearLayout;
 
@@ -19,6 +25,7 @@ import com.zeapo.pwdstore.git.config.SshConfigSessionFactory;
 import com.zeapo.pwdstore.utils.PasswordRepository;
 
 import org.eclipse.jgit.api.GitCommand;
+import org.eclipse.jgit.diff.Edit;
 import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.transport.JschConfigSessionFactory;
 import org.eclipse.jgit.transport.SshSessionFactory;
@@ -140,10 +147,11 @@ public abstract class GitOperation {
                             }
                         }).show();
             } else {
-                final EditText passphrase = new EditText(callingActivity);
+                LayoutInflater layoutInflater = LayoutInflater.from(callingActivity.getApplicationContext());
-                passphrase.setHint("Passphrase");
+                @SuppressLint("InflateParams") final View dialogView = layoutInflater.inflate(R.layout.git_passphrase_layout, null);
-                passphrase.setWidth(LinearLayout.LayoutParams.MATCH_PARENT);
+                final EditText passphrase = (EditText) dialogView.findViewById(R.id.sshkey_passphrase);
-                passphrase.setInputType(InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
+                final SharedPreferences settings = PreferenceManager.getDefaultSharedPreferences(callingActivity.getApplicationContext());
+                final String sshKeyPassphrase = settings.getString("ssh_key_passphrase", null);
                 if (showError) {
                     passphrase.setError("Wrong passphrase");
                 }
@@ -152,16 +160,30 @@ public abstract class GitOperation {
                     final KeyPair keyPair = KeyPair.load(jsch, callingActivity.getFilesDir() + "/.ssh_key");
 
                     if (keyPair.isEncrypted()) {
+                        if (sshKeyPassphrase != null && !sshKeyPassphrase.isEmpty()) {
+                            if (keyPair.decrypt(sshKeyPassphrase)) {
+                                // Authenticate using the ssh-key and then execute the command
+                                setAuthentication(sshKey, username, sshKeyPassphrase).execute();
+                            } else {
+                                // call back the method
+                                executeAfterAuthentication(connectionMode, username, sshKey, true);
+                            }
+                        } else {
                             new AlertDialog.Builder(callingActivity)
                                     .setTitle(callingActivity.getResources().getString(R.string.passphrase_dialog_title))
                                     .setMessage(callingActivity.getResources().getString(R.string.passphrase_dialog_text))
-                                .setView(passphrase)
+                                    .setView(dialogView)
                                     .setPositiveButton(callingActivity.getResources().getString(R.string.dialog_ok), new DialogInterface.OnClickListener() {
                                         public void onClick(DialogInterface dialog, int whichButton) {
                                             if (keyPair.decrypt(passphrase.getText().toString())) {
+                                                boolean rememberPassphrase = ((CheckBox) dialogView.findViewById(R.id.sshkey_remember_passphrase)).isChecked();
+                                                if (rememberPassphrase) {
+                                                    settings.edit().putString("ssh_key_passphrase", passphrase.getText().toString()).apply();
+                                                }
                                                 // Authenticate using the ssh-key and then execute the command
                                                 setAuthentication(sshKey, username, passphrase.getText().toString()).execute();
                                             } else {
+                                                settings.edit().putString("ssh_key_passphrase", null).apply();
                                                 // call back the method
                                                 executeAfterAuthentication(connectionMode, username, sshKey, true);
                                             }
@@ -171,6 +193,7 @@ public abstract class GitOperation {
                                     // Do nothing.
                                 }
                             }).show();
+                        }
                     } else {
                         setAuthentication(sshKey, username, "").execute();
                     }

app/src/main/res/layout/git_passphrase_layout.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/linearLayout"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent">
+
+    <EditText
+        android:id="@+id/sshkey_passphrase"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="16dp"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="8dp"
+        android:ems="10"
+        android:inputType="textPassword"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <CheckBox
+        android:id="@+id/sshkey_remember_passphrase"
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_marginEnd="16dp"
+        android:layout_marginRight="16dp"
+        android:layout_marginStart="16dp"
+        android:layout_marginTop="8dp"
+        android:text="Remember until the application is closed"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/sshkey_passphrase" />
+</android.support.constraint.ConstraintLayout>

app/src/main/res/values/strings.xml

@@ -46,7 +46,7 @@
     <string name="ssh_preferences_dialog_import">Import</string>
     <string name="ssh_preferences_dialog_generate">Generate</string>
     <string name="passphrase_dialog_title">Authenticate</string>
-    <string name="passphrase_dialog_text">Please provide the passphrase for your SSH key. Leave it empty if there is no passphrase.</string>
+    <string name="passphrase_dialog_text">Please provide the passphrase for your SSH key</string>
     <string name="password_dialog_text">Please provide the password for this repository</string>
 
     <!-- Clone fragment -->
@@ -208,4 +208,5 @@
     <string name="git_push_generic_error">Push was rejected by remote, reason:</string>
     <string name="git_push_other_error">Remote rejected non-fast-forward push. Check receive.denyNonFastForwards variable in config file of destination repository.</string>
     <string name="jgit_error_push_dialog_text">Error occurred during the push operation:</string>
+    <string name="ssh_key_clear_passphrase">Clear ssh-key saved passphrase</string>
 </resources>

app/src/main/res/xml/preference.xml

@@ -13,6 +13,9 @@
         <Preference
             android:key="ssh_keygen"
             android:title="@string/pref_ssh_keygen_title" />
+        <Preference
+            android:key="ssh_key_clear_passphrase"
+            android:title="@string/ssh_key_clear_passphrase" />
         <Preference
             android:key="ssh_see_key"
             android:title="@string/pref_ssh_see_key_title" />