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/*
* Copyright © 2017-2018 WireGuard LLC. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
package com.wireguard.android.util;
import android.content.Context;
import android.os.Build;
import android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
public final class SharedLibraryLoader {
private static final String TAG = "WireGuard/" + SharedLibraryLoader.class.getSimpleName();
private SharedLibraryLoader() {
}
public static void loadSharedLibrary(final Context context, final String libName) {
Throwable noAbiException;
try {
System.loadLibrary(libName);
return;
} catch (final UnsatisfiedLinkError e) {
Log.d(TAG, "Failed to load library normally, so attempting to extract from apk", e);
noAbiException = e;
}
final ZipFile zipFile;
try {
zipFile = new ZipFile(new File(context.getApplicationInfo().sourceDir), ZipFile.OPEN_READ);
} catch (final IOException e) {
throw new RuntimeException(e);
}
final String mappedLibName = System.mapLibraryName(libName);
final byte[] buffer = new byte[1024 * 32];
for (final String abi : Build.SUPPORTED_ABIS) {
final String libZipPath = "lib" + File.separatorChar + abi + File.separatorChar + mappedLibName;
final ZipEntry zipEntry = zipFile.getEntry(libZipPath);
if (zipEntry == null)
continue;
File f = null;
try {
f = File.createTempFile("lib", ".so", context.getCacheDir());
Log.d(TAG, "Extracting apk:/" + libZipPath + " to " + f.getAbsolutePath() + " and loading");
try (final FileOutputStream out = new FileOutputStream(f);
final InputStream in = zipFile.getInputStream(zipEntry)) {
int len;
while ((len = in.read(buffer)) != -1) {
out.write(buffer, 0, len);
}
}
System.load(f.getAbsolutePath());
return;
} catch (final Exception e) {
Log.d(TAG, "Failed to load library apk:/" + libZipPath, e);
noAbiException = e;
} finally {
if (f != null)
// noinspection ResultOfMethodCallIgnored
f.delete();
}
}
if (noAbiException instanceof RuntimeException)
throw (RuntimeException) noAbiException;
throw new RuntimeException(noAbiException);
}
}
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