106 lines
3.4 KiB
Java
106 lines
3.4 KiB
Java
/*
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* Copyright (C) 2017 Schürmann & Breitmoser GbR
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.sufficientlysecure.keychain.daos;
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import java.io.ByteArrayOutputStream;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import android.content.Context;
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import okhttp3.internal.Util;
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class LocalPublicKeyStorage {
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private static final String FORMAT_STR_PUBLIC_KEY = "0x%016x.pub";
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private static final String PUBLIC_KEYS_DIR_NAME = "public_keys";
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private final File localPublicKeysDir;
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public static LocalPublicKeyStorage getInstance(Context context) {
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File localPublicKeysDir = new File(context.getFilesDir(), PUBLIC_KEYS_DIR_NAME);
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return new LocalPublicKeyStorage(localPublicKeysDir);
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}
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private LocalPublicKeyStorage(File localPublicKeysDir) {
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this.localPublicKeysDir = localPublicKeysDir;
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}
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private File getPublicKeyFile(long masterKeyId) throws IOException {
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if (!localPublicKeysDir.exists()) {
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localPublicKeysDir.mkdir();
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}
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if (!localPublicKeysDir.isDirectory()) {
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throw new IOException("Failed creating public key directory!");
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}
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String keyFilename = String.format(FORMAT_STR_PUBLIC_KEY, masterKeyId);
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return new File(localPublicKeysDir, keyFilename);
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}
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void writePublicKey(long masterKeyId, byte[] encoded) throws IOException {
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File publicKeyFile = getPublicKeyFile(masterKeyId);
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FileOutputStream fileOutputStream = new FileOutputStream(publicKeyFile);
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try {
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fileOutputStream.write(encoded);
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} finally {
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Util.closeQuietly(fileOutputStream);
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}
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}
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byte[] readPublicKey(long masterKeyId) throws IOException {
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File publicKeyFile = getPublicKeyFile(masterKeyId);
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try {
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FileInputStream fileInputStream = new FileInputStream(publicKeyFile);
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return readIntoByteArray(fileInputStream);
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} catch (FileNotFoundException e) {
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return null;
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}
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}
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private static byte[] readIntoByteArray(FileInputStream fileInputStream) throws IOException {
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ByteArrayOutputStream baos = new ByteArrayOutputStream();
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byte[] buf = new byte[128];
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int bytesRead;
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while ((bytesRead = fileInputStream.read(buf)) != -1) {
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baos.write(buf, 0, bytesRead);
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}
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return baos.toByteArray();
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}
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void deletePublicKey(long masterKeyId) throws IOException {
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File publicKeyFile = getPublicKeyFile(masterKeyId);
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if (publicKeyFile.exists()) {
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boolean deleteSuccess = publicKeyFile.delete();
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if (!deleteSuccess) {
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throw new IOException("File exists, but could not be deleted!");
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}
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}
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}
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}
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