Java tutorial
/* * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you under the Apache License, Version 2.0 (the * "License"); you may not use this file except in compliance * with the License. You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, * software distributed under the License is distributed on an * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY * KIND, either express or implied. See the License for the * specific language governing permissions and limitations * under the License. */ package com.doplgangr.secrecy.filesystem.encryption; import android.content.Context; import android.net.Uri; import com.doplgangr.secrecy.exceptions.SecrecyFileException; import com.doplgangr.secrecy.filesystem.CryptStateListener; import com.doplgangr.secrecy.filesystem.files.EncryptedFile; import com.doplgangr.secrecy.filesystem.files.EncryptedFileFactory; import com.doplgangr.secrecy.filesystem.Storage; import com.doplgangr.secrecy.Util; import com.ipaulpro.afilechooser.utils.FileUtils; import java.io.File; import java.io.FileFilter; import java.io.FileNotFoundException; import java.io.IOException; import java.io.Serializable; import java.security.InvalidKeyException; import java.util.Arrays; import java.util.List; import java.util.regex.Pattern; public class Vault implements Serializable { private final String name; private final String path; private final String passphrase; private Crypter crypter; public Boolean wrongPass = false; Vault(String name, String passphrase) { this.name = name; this.passphrase = passphrase; path = Storage.getRoot().getAbsolutePath() + '/' + name; // Dont load Crypter if vault is ECB vault if (isEcbVault()) { return; } try { crypter = new AES_CTR_Crypter(path, passphrase); } catch (InvalidKeyException e) { Util.log("Passphrase is wrong"); wrongPass = true; } } Vault(String name, String passphrase, Boolean istemp) { this.passphrase = passphrase; this.name = name; path = Storage.getRoot().getAbsolutePath() + '/' + name; // Dont load Crypter if vault is ECB vault if (isEcbVault()) { return; } try { crypter = new AES_CTR_Crypter(path, passphrase); } catch (InvalidKeyException e) { Util.log("Passphrase is wrong"); wrongPass = true; } //do not initialize now coz this is temp } public boolean isEcbVault() { File nomedia = new File(path + "/.nomedia"); File newVaultHeader = new File(path + "/.vault"); return (nomedia.exists() && !newVaultHeader.exists()); } public boolean updateFromECBVault(String passphrase) throws FileNotFoundException, InvalidKeyException, SecrecyFileException { @SuppressWarnings("deprecation") AES_ECB_Crypter ecb_crypter = new AES_ECB_Crypter(path, passphrase); Crypter newCrypter = new AES_CTR_Crypter(path, passphrase); List<File> files = getFileList(); for (File file : files) { EncryptedFile oldEncryptedFile = EncryptedFileFactory.getInstance().loadEncryptedFile(file, ecb_crypter, true); CryptStateListener listener = new CryptStateListener() { @Override public void updateProgress(int progress) { } @Override public void setMax(int max) { } @Override public void onFailed(int statCode) { } @Override public void Finished() { } }; File tempFile = oldEncryptedFile.readFile(listener); EncryptedFileFactory.getInstance().createNewEncryptedFile(tempFile, newCrypter, this); File oldThumbnail = new File(path + "/_thumb" + file.getName()); oldThumbnail.delete(); file.delete(); tempFile.delete(); } return true; } public void ecbUpdateFailed() { File vaultHeader = new File(path + "/.vault"); vaultHeader.delete(); } public String getPath() { return path; } private static boolean fileFilter(java.io.File file) { String regex = "^((?!_thumb|.thumb|.nomedia|.vault|.header).)*$"; //Filter out .nomedia, .thumb and .header String name = file.getName(); final Pattern p = Pattern.compile(regex); p.matcher(name).matches(); return p.matcher(name).matches(); } public String getName() { return name; } public void iterateAllFiles(onFileFoundListener listener) { List<File> files = getFileList(); for (File file : files) { try { listener.dothis(EncryptedFileFactory.getInstance().loadEncryptedFile(file, crypter, false)); } catch (FileNotFoundException e) { //Ignore } } } public EncryptedFile addFile(final Context context, final Uri uri) throws SecrecyFileException { Util.log("Vault: adding file ", uri); return EncryptedFileFactory.getInstance() .createNewEncryptedFile((new File(FileUtils.getPath(context, uri))), crypter, this); } public Boolean delete() { if (!wrongPass) try { org.apache.commons.io.FileUtils.deleteDirectory(new File(path)); } catch (IOException e) { e.printStackTrace(); } return !wrongPass; } public void deleteFile(EncryptedFile file) { crypter.deleteFile(file); } private List<File> getFileList() { File folder = new File(path); return Arrays.asList(folder.listFiles(new FileFilter() { @Override public boolean accept(java.io.File file) { return fileFilter(file); } })); } public Vault rename(String name) { if (wrongPass) return null; //bye File folder = new File(path); File newFolder = new File(folder.getParent(), name); if (folder.getAbsolutePath().equals(newFolder.getAbsolutePath())) return this; //same name, bye try { org.apache.commons.io.FileUtils.moveDirectory(folder, newFolder); } catch (IOException e) { return null; } return VaultHolder.getInstance().createAndRetrieveVault(name, passphrase); } public interface onFileFoundListener { void dothis(EncryptedFile encryptedFile); } public boolean changePassphrase(String oldPassphrase, String newPassphrase) { return crypter.changePassphrase(oldPassphrase, newPassphrase); } }