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/*
* Copyright © 2018 Samuel Holland <samuel@sholland.org>
* Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
* SPDX-License-Identifier: GPL-2.0-or-later
*/
package com.wireguard.android.configStore;
import android.content.Context;
import android.util.Log;
import com.wireguard.android.Application.ApplicationContext;
import com.wireguard.config.Config;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.util.Set;
import java9.util.stream.Collectors;
import java9.util.stream.Stream;
/**
* Configuration store that uses a {@code wg-quick}-style file for each configured tunnel.
*/
public final class FileConfigStore implements ConfigStore {
private static final String TAG = "WireGuard/" + FileConfigStore.class.getSimpleName();
private final Context context;
public FileConfigStore(@ApplicationContext final Context context) {
this.context = context;
}
@Override
public Config create(final String name, final Config config) throws IOException {
Log.d(TAG, "Creating configuration for tunnel " + name);
final File file = fileFor(name);
if (!file.createNewFile())
throw new IOException("Configuration file " + file.getName() + " already exists");
try (FileOutputStream stream = new FileOutputStream(file, false)) {
stream.write(config.toString().getBytes(StandardCharsets.UTF_8));
}
return config;
}
@Override
public void delete(final String name) throws IOException {
Log.d(TAG, "Deleting configuration for tunnel " + name);
final File file = fileFor(name);
if (!file.delete())
throw new IOException("Cannot delete configuration file " + file.getName());
}
@Override
public Set<String> enumerate() {
return Stream.of(context.fileList())
.filter(name -> name.endsWith(".conf"))
.map(name -> name.substring(0, name.length() - ".conf".length()))
.collect(Collectors.toUnmodifiableSet());
}
private File fileFor(final String name) {
return new File(context.getFilesDir(), name + ".conf");
}
@Override
public Config load(final String name) throws IOException {
try (FileInputStream stream = new FileInputStream(fileFor(name))) {
return Config.from(stream);
}
}
@Override
public void rename(final String name, final String replacement) throws IOException {
Log.d(TAG, "Renaming configuration for tunnel " + name + " to " + replacement);
final File file = fileFor(name);
final File replacementFile = fileFor(replacement);
if (!replacementFile.createNewFile())
throw new IOException("Configuration for " + replacement + " already exists");
if (!file.renameTo(replacementFile)) {
if (!replacementFile.delete())
Log.w(TAG, "Couldn't delete marker file for new name " + replacement);
throw new IOException("Cannot rename configuration file " + file.getName());
}
}
@Override
public Config save(final String name, final Config config) throws IOException {
Log.d(TAG, "Saving configuration for tunnel " + name);
final File file = fileFor(name);
if (!file.isFile())
throw new FileNotFoundException("Configuration file " + file.getName() + " not found");
try (FileOutputStream stream = new FileOutputStream(file, false)) {
stream.write(config.toString().getBytes(StandardCharsets.UTF_8));
}
return config;
}
}
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