change edit key for empty private master keys

OpenPGP-Keychain/res/layout/edit_key_section.xml

@@ -41,6 +41,7 @@
             android:text="Section Name" />
 
         <ImageView
+            android:id="@+id/plusbutton"
             style="@style/PlusButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/helper/PgpMain.java

@@ -309,6 +309,31 @@ public class PgpMain {
         return secKeyRing;
     }
 
+    public static void changeSecretKeyPassphrase(Context context,
+            PGPSecretKeyRing keyRing, String oldPassPhrase, String newPassPhrase, 
+            ProgressDialogUpdater progress) throws IOException, PGPException, PGPException,
+            NoSuchProviderException {
+
+        updateProgress(progress, R.string.progress_buildingKey, 0, 100);
+        if (oldPassPhrase == null) {
+            oldPassPhrase = "";
+        }
+        if (newPassPhrase == null) {
+            newPassPhrase = "";
+        }
+
+        PGPSecretKeyRing newKeyRing = PGPSecretKeyRing.copyWithNewPassword(keyRing,
+            oldPassPhrase.toCharArray(), newPassPhrase.toCharArray(), keyRing.getSecretKey().getKeyEncryptionAlgorithm(),
+            new SecureRandom(), BOUNCY_CASTLE_PROVIDER_NAME);
+
+        updateProgress(progress, R.string.progress_savingKeyRing, 50, 100);
+
+        ProviderHelper.saveKeyRing(context, newKeyRing);
+
+        updateProgress(progress, R.string.progress_done, 100, 100);
+
+   }
+
     public static void buildSecretKey(Context context, ArrayList<String> userIds,
             ArrayList<PGPSecretKey> keys, ArrayList<Integer> keysUsages, long masterKeyId,
             String oldPassPhrase, String newPassPhrase, ProgressDialogUpdater progress)

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/provider/ProviderHelper.java

@@ -34,6 +34,7 @@ import org.sufficientlysecure.keychain.helper.PgpMain;
 import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings;
 import org.sufficientlysecure.keychain.provider.KeychainContract.Keys;
 import org.sufficientlysecure.keychain.provider.KeychainContract.UserIds;
+import org.sufficientlysecure.keychain.provider.KeychainDatabase.Tables;
 import org.sufficientlysecure.keychain.util.IterableIterator;
 import org.sufficientlysecure.keychain.util.Log;
 
@@ -494,6 +495,49 @@ public class ProviderHelper {
         return getMasterKeyId(context, queryUri, keyRingRowId);
     }
 
+    /**
+     * Get empty status of master key of keyring by its row id
+     * 
+     * @param context
+     * @param keyRingRowId
+     * @return
+     */
+    public static boolean getSecretMasterKeyCanSign(Context context, long keyRingRowId) {
+        Uri queryUri = KeyRings.buildSecretKeyRingsUri(String.valueOf(keyRingRowId));
+        return getMasterKeyCanSign(context, queryUri, keyRingRowId);
+    }
+
+    /**
+     * Private helper method to get master key private empty status of keyring by its row id
+     * 
+     * @param context
+     * @param queryUri
+     * @param keyRingRowId
+     * @return
+     */
+    private static boolean getMasterKeyCanSign(Context context, Uri queryUri, long keyRingRowId) {
+        String[] projection = new String[] { KeyRings.MASTER_KEY_ID, "(SELECT COUNT(sign_keys." + 
+            Keys._ID + ") FROM " + Tables.KEYS + " AS sign_keys WHERE sign_keys." + Keys.KEY_RING_ROW_ID + " = "
+            + KeychainDatabase.Tables.KEY_RINGS + "." + KeyRings._ID + " AND sign_keys."
+            + Keys.CAN_SIGN + " = '1' AND " + Keys.IS_MASTER_KEY + " = 1) AS sign",  };
+
+        ContentResolver cr = context.getContentResolver();
+        Cursor cursor = cr.query(queryUri, projection, null, null, null);
+
+        long masterKeyId = -1;
+        if (cursor != null && cursor.moveToFirst()) {
+            int masterKeyIdCol = cursor.getColumnIndex("sign");
+
+            masterKeyId = cursor.getLong(masterKeyIdCol);
+        }
+
+        if (cursor != null) {
+            cursor.close();
+        }
+
+        return (masterKeyId > 0);
+    }
+
     /**
      * Get master key id of keyring by its row id
      * 

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/service/KeychainIntentService.java

@@ -123,6 +123,7 @@ public class KeychainIntentService extends IntentService implements ProgressDial
     public static final String SAVE_KEYRING_KEYS = "keys";
     public static final String SAVE_KEYRING_KEYS_USAGES = "keysUsages";
     public static final String SAVE_KEYRING_MASTER_KEY_ID = "masterKeyId";
+    public static final String SAVE_KEYRING_CAN_SIGN = "can_sign";
 
     // generate key
     public static final String GENERATE_KEY_ALGORITHM = "algorithm";
@@ -523,6 +524,12 @@ public class KeychainIntentService extends IntentService implements ProgressDial
                 /* Input */
                 String oldPassPhrase = data.getString(SAVE_KEYRING_CURRENT_PASSPHRASE);
                 String newPassPhrase = data.getString(SAVE_KEYRING_NEW_PASSPHRASE);
+                boolean canSign = true;
+
+                if (data.containsKey(SAVE_KEYRING_CAN_SIGN)) {
+                    canSign = data.getBoolean(SAVE_KEYRING_CAN_SIGN);
+                }
+
                 if (newPassPhrase == null) {
                     newPassPhrase = oldPassPhrase;
                 }
@@ -533,8 +540,13 @@ public class KeychainIntentService extends IntentService implements ProgressDial
                 long masterKeyId = data.getLong(SAVE_KEYRING_MASTER_KEY_ID);
 
                 /* Operation */
+                if (!canSign) { //library fails, fix later
+                    //PgpMain.changeSecretKeyPassphrase(this, ProviderHelper.getPGPSecretKeyRingByKeyId(this, masterKeyId), 
+                    //oldPassPhrase, newPassPhrase, this);
+                } else {
                     PgpMain.buildSecretKey(this, userIds, keys, keysUsages, masterKeyId, oldPassPhrase,
                         newPassPhrase, this);
+                }
                 PassphraseCacheService.addCachedPassphrase(this, masterKeyId, newPassPhrase);
 
                 /* Output */

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/EditKeyActivity.java

@@ -75,6 +75,7 @@ public class EditKeyActivity extends SherlockFragmentActivity {
     public static final String EXTRA_NO_PASSPHRASE = "noPassphrase";
     public static final String EXTRA_GENERATE_DEFAULT_KEYS = "generateDefaultKeys";
     public static final String EXTRA_MASTER_KEY_ID = "masterKeyId";
+    public static final String EXTRA_MASTER_CAN_SIGN = "masterCanSign";
 
     // results when saving key
     public static final String RESULT_EXTRA_MASTER_KEY_ID = "masterKeyId";
@@ -97,6 +98,7 @@ public class EditKeyActivity extends SherlockFragmentActivity {
     Vector<String> mUserIds;
     Vector<PGPSecretKey> mKeys;
     Vector<Integer> mKeysUsages;
+    boolean masterCanSign = true;
 
     // will be set to false to build layout later in handler
     private boolean mBuildLayout = true;
@@ -192,6 +194,13 @@ public class EditKeyActivity extends SherlockFragmentActivity {
             }
         });
 
+        //disable key passhphrase changing with empty private keys for no
+        //library fails, fix later
+        if (!masterCanSign) {
+            mChangePassPhrase.setEnabled(false);
+            mNoPassphrase.setEnabled(false);
+        }
+
         if (mBuildLayout) {
             buildLayout();
         }
@@ -317,6 +326,9 @@ public class EditKeyActivity extends SherlockFragmentActivity {
         }
 
         if (extras != null) {
+            if (extras.containsKey(EXTRA_MASTER_CAN_SIGN)) {
+                masterCanSign = extras.getBoolean(EXTRA_MASTER_CAN_SIGN);
+            }
             if (extras.containsKey(EXTRA_MASTER_KEY_ID)) {
                 long masterKeyId = extras.getLong(EXTRA_MASTER_KEY_ID);
 
@@ -394,10 +406,12 @@ public class EditKeyActivity extends SherlockFragmentActivity {
         LinearLayout container = (LinearLayout) findViewById(R.id.edit_key_container);
         mUserIdsView = (SectionView) inflater.inflate(R.layout.edit_key_section, container, false);
         mUserIdsView.setType(Id.type.user_id);
+        mUserIdsView.setCanEdit(masterCanSign);
         mUserIdsView.setUserIds(mUserIds);
         container.addView(mUserIdsView);
         mKeysView = (SectionView) inflater.inflate(R.layout.edit_key_section, container, false);
         mKeysView.setType(Id.type.key);
+        mKeysView.setCanEdit(masterCanSign);
         mKeysView.setKeys(mKeys, mKeysUsages);
         container.addView(mKeysView);
 
@@ -447,6 +461,7 @@ public class EditKeyActivity extends SherlockFragmentActivity {
             data.putIntegerArrayList(KeychainIntentService.SAVE_KEYRING_KEYS_USAGES,
                     getKeysUsages(mKeysView));
             data.putLong(KeychainIntentService.SAVE_KEYRING_MASTER_KEY_ID, getMasterKeyId());
+            data.putBoolean(KeychainIntentService.SAVE_KEYRING_CAN_SIGN, masterCanSign);
 
             intent.putExtra(KeychainIntentService.EXTRA_DATA, data);
 

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/KeyListSecretActivity.java

@@ -70,18 +70,19 @@ public class KeyListSecretActivity extends KeyListActivity {
         }
     }
 
-    public void checkPassPhraseAndEdit(long masterKeyId) {
+    public void checkPassPhraseAndEdit(long masterKeyId, boolean masterCanSign) {
         String passPhrase = PassphraseCacheService.getCachedPassphrase(this, masterKeyId);
         if (passPhrase == null) {
-            showPassphraseDialog(masterKeyId);
+            showPassphraseDialog(masterKeyId, masterCanSign);
         } else {
             PgpMain.setEditPassPhrase(passPhrase);
-            editKey(masterKeyId);
+            editKey(masterKeyId, masterCanSign);
         }
     }
 
-    private void showPassphraseDialog(final long masterKeyId) {
+    private void showPassphraseDialog(final long masterKeyId, boolean masterCanSign) {
         // Message is received after passphrase is cached
+        final boolean mCanSign = masterCanSign;
         Handler returnHandler = new Handler() {
             @Override
             public void handleMessage(Message message) {
@@ -89,7 +90,7 @@ public class KeyListSecretActivity extends KeyListActivity {
                     String passPhrase = PassphraseCacheService.getCachedPassphrase(
                             KeyListSecretActivity.this, masterKeyId);
                     PgpMain.setEditPassPhrase(passPhrase);
-                    editKey(masterKeyId);
+                    editKey(masterKeyId, mCanSign);
                 }
             }
         };
@@ -115,9 +116,10 @@ public class KeyListSecretActivity extends KeyListActivity {
         startActivityForResult(intent, 0);
     }
 
-    private void editKey(long masterKeyId) {
+    private void editKey(long masterKeyId, boolean masterCanSign) {
         Intent intent = new Intent(EditKeyActivity.ACTION_EDIT_KEY);
         intent.putExtra(EditKeyActivity.EXTRA_MASTER_KEY_ID, masterKeyId);
+        intent.putExtra(EditKeyActivity.EXTRA_MASTER_CAN_SIGN, masterCanSign);
         startActivityForResult(intent, 0);
     }
 

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/KeyListSecretFragment.java

@@ -91,9 +91,11 @@ public class KeyListSecretFragment extends KeyListFragment implements
         long masterKeyId = ProviderHelper
                 .getSecretMasterKeyId(mKeyListSecretActivity, keyRingRowId);
 
+        boolean masterCanSign = ProviderHelper.getSecretMasterKeyCanSign(mKeyListSecretActivity, keyRingRowId);
+
         switch (item.getItemId()) {
         case Id.menu.edit:
-            mKeyListSecretActivity.checkPassPhraseAndEdit(masterKeyId);
+            mKeyListSecretActivity.checkPassPhraseAndEdit(masterKeyId, masterCanSign);
 
             return true;
 

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/widget/KeyEditor.java

@@ -125,6 +125,14 @@ public class KeyEditor extends LinearLayout implements Editor, OnClickListener {
         super.onFinishInflate();
     }
 
+    public void setCanEdit(boolean bCanEdit) {
+        if (!bCanEdit) {
+            mDeleteButton.setVisibility(View.INVISIBLE);
+            mUsage.setEnabled(false);
+            mExpiryDateButton.setEnabled(false);
+        }
+    }
+
     public void setValue(PGPSecretKey key, boolean isMasterKey, int usage) {
         mKey = key;
 

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/widget/SectionView.java

@@ -45,6 +45,7 @@ import android.view.View.OnClickListener;
 import android.view.ViewGroup;
 import android.widget.ArrayAdapter;
 import android.widget.EditText;
+import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.Spinner;
 import android.widget.TextView;
@@ -55,12 +56,14 @@ import java.util.Vector;
 public class SectionView extends LinearLayout implements OnClickListener, EditorListener {
     private LayoutInflater mInflater;
     private View mAdd;
+    private ImageView mPlusButton;
     private ViewGroup mEditors;
     private TextView mTitle;
     private int mType = 0;
 
     private Choice mNewKeyAlgorithmChoice;
     private int mNewKeySize;
+    private boolean canEdit = true;
 
     private SherlockFragmentActivity mActivity;
 
@@ -99,6 +102,14 @@ public class SectionView extends LinearLayout implements OnClickListener, Editor
         }
     }
 
+    public void setCanEdit(boolean bCanEdit) {
+         canEdit = bCanEdit;
+         mPlusButton = (ImageView)findViewById(R.id.plusbutton);
+         if (!canEdit) {
+             mPlusButton.setVisibility(View.INVISIBLE);
+         }
+    }
+
     /** {@inheritDoc} */
     @Override
     protected void onFinishInflate() {
@@ -129,6 +140,7 @@ public class SectionView extends LinearLayout implements OnClickListener, Editor
 
     /** {@inheritDoc} */
     public void onClick(View v) {
+        if (canEdit) {
         switch (mType) {
         case Id.type.user_id: {
             UserIdEditor view = (UserIdEditor) mInflater.inflate(R.layout.edit_key_user_id_item,
@@ -206,6 +218,7 @@ public class SectionView extends LinearLayout implements OnClickListener, Editor
         }
         this.updateEditorsVisible();
         }
+    }
 
     public void setUserIds(Vector<String> list) {
         if (mType != Id.type.user_id) {
@@ -221,6 +234,7 @@ public class SectionView extends LinearLayout implements OnClickListener, Editor
             if (mEditors.getChildCount() == 0) {
                 view.setIsMainUserId(true);
             }
+            view.setCanEdit(canEdit);
             mEditors.addView(view);
         }
 
@@ -241,6 +255,7 @@ public class SectionView extends LinearLayout implements OnClickListener, Editor
             view.setEditorListener(this);
             boolean isMasterKey = (mEditors.getChildCount() == 0);
             view.setValue(list.get(i), isMasterKey, usages.get(i));
+            view.setCanEdit(canEdit);
             mEditors.addView(view);
         }
 

OpenPGP-Keychain/src/org/sufficientlysecure/keychain/ui/widget/UserIdEditor.java

@@ -56,6 +56,16 @@ public class UserIdEditor extends LinearLayout implements Editor, OnClickListene
         }
     }
 
+    public void setCanEdit(boolean bCanEdit) {
+        if (!bCanEdit) {
+            mDeleteButton.setVisibility(View.INVISIBLE);
+            mName.setEnabled(false);
+            mIsMainUserId.setEnabled(false);
+            mEmail.setEnabled(false);
+            mComment.setEnabled(false);
+        }
+    }
+
     public static class NoEmailException extends Exception {
         static final long serialVersionUID = 0xf812773344L;