Java tutorial
/* * Copyright (C) 2014 Dominik Schrmann <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.content.Intent; import android.nfc.NfcAdapter; import android.os.Bundle; import android.support.annotation.Nullable; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v4.app.TaskStackBuilder; import org.sufficientlysecure.keychain.R; import org.sufficientlysecure.keychain.pgp.exception.PgpKeyNotFoundException; import org.sufficientlysecure.keychain.provider.CachedPublicKeyRing; import org.sufficientlysecure.keychain.provider.KeychainContract.KeyRings; import org.sufficientlysecure.keychain.provider.ProviderHelper; import org.sufficientlysecure.keychain.securitytoken.KeyFormat; import org.sufficientlysecure.keychain.ui.base.BaseSecurityTokenActivity; import org.sufficientlysecure.keychain.ui.util.KeyFormattingUtils; import org.sufficientlysecure.keychain.util.Passphrase; import org.sufficientlysecure.keychain.util.Preferences; import java.io.IOException; import java.util.ArrayList; public class CreateKeyActivity extends BaseSecurityTokenActivity { public static final String EXTRA_NAME = "name"; public static final String EXTRA_EMAIL = "email"; public static final String EXTRA_FIRST_TIME = "first_time"; public static final String EXTRA_ADDITIONAL_EMAILS = "additional_emails"; public static final String EXTRA_PASSPHRASE = "passphrase"; public static final String EXTRA_CREATE_SECURITY_TOKEN = "create_yubi_key"; public static final String EXTRA_SECURITY_TOKEN_PIN = "yubi_key_pin"; public static final String EXTRA_SECURITY_TOKEN_ADMIN_PIN = "yubi_key_admin_pin"; public static final String EXTRA_SECURITY_TOKEN_USER_ID = "nfc_user_id"; public static final String EXTRA_SECURITY_TOKEN_AID = "nfc_aid"; public static final String EXTRA_SECURITY_FINGERPRINTS = "nfc_fingerprints"; public static final String FRAGMENT_TAG = "currentFragment"; String mName; String mEmail; ArrayList<String> mAdditionalEmails; Passphrase mPassphrase; boolean mFirstTime; boolean mCreateSecurityToken; Passphrase mSecurityTokenPin; Passphrase mSecurityTokenAdminPin; KeyFormat mSecurityTokenSign; KeyFormat mSecurityTokenDec; KeyFormat mSecurityTokenAuth; Fragment mCurrentFragment; byte[] mScannedFingerprints; byte[] mSecurityTokenAid; String mSecurityTokenUserId; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // React on NDEF_DISCOVERED from Manifest // NOTE: ACTION_NDEF_DISCOVERED and not ACTION_TAG_DISCOVERED like in BaseNfcActivity if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) { mNfcTagDispatcher.interceptIntent(getIntent()); setTitle(R.string.title_manage_my_keys); // done return; } // Check whether we're recreating a previously destroyed instance if (savedInstanceState != null) { // Restore value of members from saved state mName = savedInstanceState.getString(EXTRA_NAME); mEmail = savedInstanceState.getString(EXTRA_EMAIL); mAdditionalEmails = savedInstanceState.getStringArrayList(EXTRA_ADDITIONAL_EMAILS); mPassphrase = savedInstanceState.getParcelable(EXTRA_PASSPHRASE); mFirstTime = savedInstanceState.getBoolean(EXTRA_FIRST_TIME); mCreateSecurityToken = savedInstanceState.getBoolean(EXTRA_CREATE_SECURITY_TOKEN); mSecurityTokenAid = savedInstanceState.getByteArray(EXTRA_SECURITY_TOKEN_AID); mSecurityTokenPin = savedInstanceState.getParcelable(EXTRA_SECURITY_TOKEN_PIN); mSecurityTokenAdminPin = savedInstanceState.getParcelable(EXTRA_SECURITY_TOKEN_ADMIN_PIN); mCurrentFragment = getSupportFragmentManager().findFragmentByTag(FRAGMENT_TAG); } else { Intent intent = getIntent(); // Initialize members with default values for a new instance mName = intent.getStringExtra(EXTRA_NAME); mEmail = intent.getStringExtra(EXTRA_EMAIL); mFirstTime = intent.getBooleanExtra(EXTRA_FIRST_TIME, false); mCreateSecurityToken = intent.getBooleanExtra(EXTRA_CREATE_SECURITY_TOKEN, false); if (intent.hasExtra(EXTRA_SECURITY_FINGERPRINTS)) { byte[] nfcFingerprints = intent.getByteArrayExtra(EXTRA_SECURITY_FINGERPRINTS); String nfcUserId = intent.getStringExtra(EXTRA_SECURITY_TOKEN_USER_ID); byte[] nfcAid = intent.getByteArrayExtra(EXTRA_SECURITY_TOKEN_AID); if (containsKeys(nfcFingerprints)) { Fragment frag = CreateSecurityTokenImportResetFragment.newInstance(nfcFingerprints, nfcAid, nfcUserId); loadFragment(frag, FragAction.START); setTitle(R.string.title_import_keys); } else { Fragment frag = CreateSecurityTokenBlankFragment.newInstance(nfcAid); loadFragment(frag, FragAction.START); setTitle(R.string.title_manage_my_keys); } // done return; } // normal key creation CreateKeyStartFragment frag = CreateKeyStartFragment.newInstance(); loadFragment(frag, FragAction.START); } if (mFirstTime) { setTitle(R.string.app_name); mToolbar.setNavigationIcon(null); mToolbar.setNavigationOnClickListener(null); } else { setTitle(R.string.title_manage_my_keys); } } @Override protected void doSecurityTokenInBackground() throws IOException { if (mCurrentFragment instanceof SecurityTokenListenerFragment) { ((SecurityTokenListenerFragment) mCurrentFragment).doSecurityTokenInBackground(); return; } mScannedFingerprints = mSecurityTokenHelper.getFingerprints(); mSecurityTokenAid = mSecurityTokenHelper.getAid(); mSecurityTokenUserId = mSecurityTokenHelper.getUserId(); } @Override protected void onSecurityTokenPostExecute() { if (mCurrentFragment instanceof SecurityTokenListenerFragment) { ((SecurityTokenListenerFragment) mCurrentFragment).onSecurityTokenPostExecute(); return; } // We don't want get back to wait activity mainly because it looks weird with otg token if (mCurrentFragment instanceof CreateSecurityTokenWaitFragment) { // hack from http://stackoverflow.com/a/11253987 CreateSecurityTokenWaitFragment.sDisableFragmentAnimations = true; getSupportFragmentManager().popBackStackImmediate(null, FragmentManager.POP_BACK_STACK_INCLUSIVE); CreateSecurityTokenWaitFragment.sDisableFragmentAnimations = false; } if (containsKeys(mScannedFingerprints)) { try { long masterKeyId = KeyFormattingUtils.getKeyIdFromFingerprint(mScannedFingerprints); CachedPublicKeyRing ring = new ProviderHelper(this).getCachedPublicKeyRing(masterKeyId); ring.getMasterKeyId(); Intent intent = new Intent(this, ViewKeyActivity.class); intent.setData(KeyRings.buildGenericKeyRingUri(masterKeyId)); intent.putExtra(ViewKeyActivity.EXTRA_SECURITY_TOKEN_AID, mSecurityTokenAid); intent.putExtra(ViewKeyActivity.EXTRA_SECURITY_TOKEN_USER_ID, mSecurityTokenUserId); intent.putExtra(ViewKeyActivity.EXTRA_SECURITY_TOKEN_FINGERPRINTS, mScannedFingerprints); startActivity(intent); finish(); } catch (PgpKeyNotFoundException e) { Fragment frag = CreateSecurityTokenImportResetFragment.newInstance(mScannedFingerprints, mSecurityTokenAid, mSecurityTokenUserId); loadFragment(frag, FragAction.TO_RIGHT); } } else { Fragment frag = CreateSecurityTokenBlankFragment.newInstance(mSecurityTokenAid); loadFragment(frag, FragAction.TO_RIGHT); } } private boolean containsKeys(byte[] scannedFingerprints) { if (scannedFingerprints == null) { return false; } // If all fingerprint bytes are 0, the card contains no keys. for (byte b : scannedFingerprints) { if (b != 0) { return true; } } return false; } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putString(EXTRA_NAME, mName); outState.putString(EXTRA_EMAIL, mEmail); outState.putStringArrayList(EXTRA_ADDITIONAL_EMAILS, mAdditionalEmails); outState.putParcelable(EXTRA_PASSPHRASE, mPassphrase); outState.putBoolean(EXTRA_FIRST_TIME, mFirstTime); outState.putBoolean(EXTRA_CREATE_SECURITY_TOKEN, mCreateSecurityToken); outState.putByteArray(EXTRA_SECURITY_TOKEN_AID, mSecurityTokenAid); outState.putParcelable(EXTRA_SECURITY_TOKEN_PIN, mSecurityTokenPin); outState.putParcelable(EXTRA_SECURITY_TOKEN_ADMIN_PIN, mSecurityTokenAdminPin); } @Override protected void initLayout() { setContentView(R.layout.create_key_activity); } public enum FragAction { START, TO_RIGHT, TO_LEFT } public void loadFragment(Fragment fragment, FragAction action) { mCurrentFragment = fragment; // Add the fragment to the 'fragment_container' FrameLayout FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); switch (action) { case START: transaction.setCustomAnimations(0, 0); transaction.replace(R.id.create_key_fragment_container, fragment, FRAGMENT_TAG).commit(); break; case TO_LEFT: getSupportFragmentManager().popBackStackImmediate(); break; case TO_RIGHT: transaction.setCustomAnimations(R.anim.frag_slide_in_from_right, R.anim.frag_slide_out_to_left, R.anim.frag_slide_in_from_left, R.anim.frag_slide_out_to_right); transaction.addToBackStack(null); transaction.replace(R.id.create_key_fragment_container, fragment, FRAGMENT_TAG).commit(); break; } // do it immediately! getSupportFragmentManager().executePendingTransactions(); } interface SecurityTokenListenerFragment { void doSecurityTokenInBackground() throws IOException; void onSecurityTokenPostExecute(); } @Override public void finish() { finishWithFirstTimeHandling(null); } public void finishWithFirstTimeHandling(@Nullable Intent intentToLaunch) { if (mFirstTime) { Preferences prefs = Preferences.getPreferences(this); prefs.setFirstTime(false); TaskStackBuilder taskStackBuilder = TaskStackBuilder.create(this); Intent mainActivityIntent = new Intent(this, MainActivity.class); taskStackBuilder.addNextIntent(mainActivityIntent); if (intentToLaunch != null) { taskStackBuilder.addNextIntent(intentToLaunch); } taskStackBuilder.startActivities(); } else if (intentToLaunch != null) { startActivity(intentToLaunch); } super.finish(); } }