1 files changed, 213 insertions, 0 deletions
diff --git a/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateSecurityTokenPinFragment.java b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateSecurityTokenPinFragment.java
new file mode 100644
index 000000000..45cf7a665
--- /dev/null
+++ b/OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/CreateSecurityTokenPinFragment.java
@@ -0,0 +1,213 @@
+/*
+ * Copyright (C) 2015 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.ui;
+
+import android.app.Activity;
+import android.content.Context;
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.support.v4.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.view.inputmethod.InputMethodManager;
+import android.widget.EditText;
+import android.widget.TextView;
+
+import org.sufficientlysecure.keychain.R;
+import org.sufficientlysecure.keychain.ui.CreateKeyActivity.FragAction;
+import org.sufficientlysecure.keychain.util.Passphrase;
+
+import java.security.SecureRandom;
+import java.util.Arrays;
+import java.util.HashSet;
+
+public class CreateSecurityTokenPinFragment extends Fragment {
+
+    // view
+    CreateKeyActivity mCreateKeyActivity;
+    EditText mPin;
+    EditText mPinRepeat;
+    TextView mAdminPin;
+    View mBackButton;
+    View mNextButton;
+
+    private static HashSet<String> sPinBlacklist = new HashSet<>(Arrays.asList(
+            "000000",
+            "111111",
+            "222222",
+            "333333",
+            "444444",
+            "555555",
+            "666666",
+            "777777",
+            "888888",
+            "999999",
+            "123456",
+            "XXXXXX"
+    ));
+
+    /**
+     * Creates new instance of this fragment
+     */
+    public static CreateSecurityTokenPinFragment newInstance() {
+        CreateSecurityTokenPinFragment frag = new CreateSecurityTokenPinFragment();
+
+        Bundle args = new Bundle();
+        frag.setArguments(args);
+
+        return frag;
+    }
+
+    /**
+     * Checks if text of given EditText is not empty. If it is empty an error is
+     * set and the EditText gets the focus.
+     *
+     * @return true if EditText is not empty
+     */
+    private static boolean isEditTextNotEmpty(Context context, EditText editText) {
+        boolean output = true;
+        if (editText.getText().length() == 0) {
+            editText.setError(context.getString(R.string.create_key_empty));
+            editText.requestFocus();
+            output = false;
+        } else {
+            editText.setError(null);
+        }
+
+        return output;
+    }
+
+    private static boolean areEditTextsEqual(EditText editText1, EditText editText2) {
+        Passphrase p1 = new Passphrase(editText1);
+        Passphrase p2 = new Passphrase(editText2);
+        return (p1.equals(p2));
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.create_yubi_key_pin_fragment, container, false);
+
+        mPin = (EditText) view.findViewById(R.id.create_yubi_key_pin);
+        mPinRepeat = (EditText) view.findViewById(R.id.create_yubi_key_pin_repeat);
+        mAdminPin = (TextView) view.findViewById(R.id.create_yubi_key_admin_pin);
+        mBackButton = view.findViewById(R.id.create_key_back_button);
+        mNextButton = view.findViewById(R.id.create_key_next_button);
+
+        if (mCreateKeyActivity.mSecurityTokenPin == null) {
+            new AsyncTask<Void, Void, Passphrase>() {
+                @Override
+                protected Passphrase doInBackground(Void... unused) {
+                    SecureRandom secureRandom = new SecureRandom();
+                    // min = 8, we choose 8
+                    String adminPin = "" + secureRandom.nextInt(9)
+                            + secureRandom.nextInt(9)
+                            + secureRandom.nextInt(9)
+                            + secureRandom.nextInt(9)
+                            + secureRandom.nextInt(9)
+                            + secureRandom.nextInt(9)
+                            + secureRandom.nextInt(9)
+                            + secureRandom.nextInt(9);
+
+                    return new Passphrase(adminPin);
+                }
+
+                @Override
+                protected void onPostExecute(Passphrase adminPin) {
+                    mCreateKeyActivity.mSecurityTokenAdminPin = adminPin;
+
+                    mAdminPin.setText(mCreateKeyActivity.mSecurityTokenAdminPin.toStringUnsafe());
+                }
+            }.execute();
+        } else {
+            mAdminPin.setText(mCreateKeyActivity.mSecurityTokenAdminPin.toStringUnsafe());
+        }
+
+        mPin.requestFocus();
+        mBackButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                back();
+            }
+        });
+        mNextButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                nextClicked();
+            }
+        });
+
+        return view;
+    }
+
+    @Override
+    public void onAttach(Activity activity) {
+        super.onAttach(activity);
+        mCreateKeyActivity = (CreateKeyActivity) getActivity();
+    }
+
+    private void back() {
+        hideKeyboard();
+        mCreateKeyActivity.loadFragment(null, FragAction.TO_LEFT);
+    }
+
+    private void nextClicked() {
+        if (isEditTextNotEmpty(getActivity(), mPin)) {
+
+            if (!areEditTextsEqual(mPin, mPinRepeat)) {
+                mPinRepeat.setError(getString(R.string.create_key_passphrases_not_equal));
+                mPinRepeat.requestFocus();
+                return;
+            }
+
+            if (mPin.getText().toString().length() < 6) {
+                mPin.setError(getString(R.string.create_key_yubi_key_pin_too_short));
+                mPin.requestFocus();
+                return;
+            }
+
+            if (sPinBlacklist.contains(mPin.getText().toString())) {
+                mPin.setError(getString(R.string.create_key_yubi_key_pin_insecure));
+                mPin.requestFocus();
+                return;
+            }
+
+            mCreateKeyActivity.mSecurityTokenPin = new Passphrase(mPin.getText().toString());
+
+            CreateKeyFinalFragment frag = CreateKeyFinalFragment.newInstance();
+            hideKeyboard();
+            mCreateKeyActivity.loadFragment(frag, FragAction.TO_RIGHT);
+        }
+    }
+
+    private void hideKeyboard() {
+        if (getActivity() == null) {
+            return;
+        }
+        InputMethodManager inputManager = (InputMethodManager) getActivity()
+                .getSystemService(Context.INPUT_METHOD_SERVICE);
+
+        // check if no view has focus
+        View v = getActivity().getCurrentFocus();
+        if (v == null)
+            return;
+
+        inputManager.hideSoftInputFromWindow(v.getWindowToken(), 0);
+    }
+
+}