75 lines
2.6 KiB
Java
75 lines
2.6 KiB
Java
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/*
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* Copyright © 2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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package com.wireguard.android.util;
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import android.content.Context;
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import android.os.Build;
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import android.util.Log;
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import java.io.File;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.zip.ZipFile;
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import java.util.zip.ZipEntry;
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public final class SharedLibraryLoader {
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private static final String TAG = "WireGuard/" + SharedLibraryLoader.class.getSimpleName();
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private SharedLibraryLoader() {
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}
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public static final void loadSharedLibrary(final Context context, final String libName) {
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Throwable noAbiException;
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try {
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System.loadLibrary(libName);
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return;
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} catch (UnsatisfiedLinkError e) {
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Log.d(TAG, "Failed to load library normally, so attempting to extract from apk", e);
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noAbiException = e;
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}
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final ZipFile zipFile;
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try {
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zipFile = new ZipFile(new File(context.getApplicationInfo().sourceDir), ZipFile.OPEN_READ);
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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final String mappedLibName = System.mapLibraryName(libName);
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byte buffer[] = new byte[1024 * 32];
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for (final String abi : Build.SUPPORTED_ABIS) {
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final String libZipPath = "lib" + File.separatorChar + abi + File.separatorChar + mappedLibName;
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final ZipEntry zipEntry = zipFile.getEntry(libZipPath);
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if (zipEntry == null)
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continue;
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File f = null;
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try {
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f = File.createTempFile("lib", ".so", context.getCacheDir());
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Log.d(TAG, "Extracting apk:/" + libZipPath + " to " + f.getAbsolutePath() + " and loading");
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FileOutputStream out = new FileOutputStream(f);
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InputStream in = zipFile.getInputStream(zipEntry);
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int len;
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while ((len = in.read(buffer)) != -1) {
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out.write(buffer, 0, len);
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}
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out.close();
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System.load(f.getAbsolutePath());
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return;
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} catch (Exception e) {
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Log.d(TAG, "Failed to load library apk:/" + libZipPath, e);
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noAbiException = e;
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} finally {
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if (f != null)
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f.delete();
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}
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}
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if (noAbiException instanceof RuntimeException)
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throw (RuntimeException) noAbiException;
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throw new RuntimeException(noAbiException);
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}
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}
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