Addd manage private keys

app/src/main/java/eu/faircode/email/FragmentOptionsPrivacy.java

@@ -23,9 +23,11 @@ import android.app.Dialog;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.SharedPreferences;
+import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.os.Bundle;
 import android.os.Handler;
+import android.provider.Settings;
 import android.security.KeyChain;
 import android.text.TextUtils;
 import android.view.KeyEvent;
@@ -74,6 +76,7 @@ public class FragmentOptionsPrivacy extends FragmentBase implements SharedPrefer
     private Spinner spBiometricsTimeout;
     private Button btnManageCertificates;
     private Button btnImportKey;
+    private Button btnManageKeys;
     private TextView tvKeySize;
 
     private List<String> openPgpProvider = new ArrayList<>();
@@ -91,6 +94,7 @@ public class FragmentOptionsPrivacy extends FragmentBase implements SharedPrefer
         setSubtitle(R.string.title_setup);
         setHasOptionsMenu(true);
 
+        PackageManager pm = getContext().getPackageManager();
         View view = inflater.inflate(R.layout.fragment_options_privacy, container, false);
 
         // Get controls
@@ -108,10 +112,11 @@ public class FragmentOptionsPrivacy extends FragmentBase implements SharedPrefer
         spBiometricsTimeout = view.findViewById(R.id.spBiometricsTimeout);
         btnManageCertificates = view.findViewById(R.id.btnManageCertificates);
         btnImportKey = view.findViewById(R.id.btnImportKey);
+        btnManageKeys = view.findViewById(R.id.btnManageKeys);
         tvKeySize = view.findViewById(R.id.tvKeySize);
 
         Intent intent = new Intent(OpenPgpApi.SERVICE_INTENT_2);
-        List<ResolveInfo> ris = getContext().getPackageManager().queryIntentServices(intent, 0);
+        List<ResolveInfo> ris = pm.queryIntentServices(intent, 0);
         for (ResolveInfo ri : ris)
             if (ri.serviceInfo != null)
                 openPgpProvider.add(ri.serviceInfo.packageName);
@@ -254,7 +259,7 @@ public class FragmentOptionsPrivacy extends FragmentBase implements SharedPrefer
         });
 
         final Intent importKey = KeyChain.createInstallIntent();
-        btnImportKey.setEnabled(importKey.resolveActivity(getContext().getPackageManager()) != null);
+        btnImportKey.setEnabled(importKey.resolveActivity(pm) != null);
         btnImportKey.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
@@ -262,6 +267,15 @@ public class FragmentOptionsPrivacy extends FragmentBase implements SharedPrefer
             }
         });
 
+        final Intent security = new Intent(Settings.ACTION_SECURITY_SETTINGS);
+        btnImportKey.setEnabled(security.resolveActivity(pm) != null);
+        btnManageKeys.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                startActivity(security);
+            }
+        });
+
         try {
             int maxKeySize = javax.crypto.Cipher.getMaxAllowedKeyLength("AES");
             tvKeySize.setText(getString(R.string.title_advanced_aes_key_size, maxKeySize));

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

@@ -253,6 +253,18 @@
             app:layout_constraintStart_toStartOf="parent"
             app:layout_constraintTop_toBottomOf="@id/btnManageCertificates" />
 
+        <Button
+            android:id="@+id/btnManageKeys"
+            style="?android:attr/buttonStyleSmall"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:layout_marginTop="12dp"
+            android:minWidth="0dp"
+            android:minHeight="0dp"
+            android:text="@string/title_advanced_manage_keys"
+            app:layout_constraintStart_toStartOf="parent"
+            app:layout_constraintTop_toBottomOf="@id/btnImportKey" />
+
         <TextView
             android:id="@+id/tvKeySize"
             android:layout_width="0dp"
@@ -261,6 +273,6 @@
             android:textAppearance="@style/TextAppearance.AppCompat.Small"
             app:layout_constraintEnd_toEndOf="parent"
             app:layout_constraintStart_toStartOf="parent"
-            app:layout_constraintTop_toBottomOf="@id/btnImportKey" />
+            app:layout_constraintTop_toBottomOf="@id/btnManageKeys" />
     </androidx.constraintlayout.widget.ConstraintLayout>
 </ScrollView>

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

@@ -340,6 +340,7 @@
     <string name="title_advanced_biometrics_timeout">Biometric authentication timeout</string>
     <string name="title_advanced_manage_certificates">Manage public keys</string>
     <string name="title_advanced_import_key">Import private key</string>
+    <string name="title_advanced_manage_keys">Manage private keys</string>
     <string name="title_advanced_aes_key_size" translatable="false">Max AES key size: %1$d</string>
 
     <string name="title_advanced_english">Force English language</string>