Themes: Check CRC of APK MANIFEST.MF at install

import java.util.concurrent.ExecutorService;

import java.util.concurrent.Executors;

import java.util.concurrent.TimeUnit;

import java.util.zip.ZipEntry;

import java.util.zip.ZipFile;

import libcore.io.ErrnoException;

import libcore.io.IoUtils;

            mPackageHashes.remove(p);

        }

        byte[] md5 = getFileMd5Sum(pkg.mPath);

        if (md5 == null) return 0;

        byte[] crc = getFileCrC(pkg.mPath);

        if (crc == null) return 0;

        p = new Pair(Arrays.hashCode(ByteBuffer.wrap(md5).put(IDMAP_HASH_VERSION).array()),

        p = new Pair(Arrays.hashCode(ByteBuffer.wrap(crc).put(IDMAP_HASH_VERSION).array()),

                System.currentTimeMillis());

        mPackageHashes.put(pkg.packageName, p);

        return p.first;

    }

    private byte[] getFileMd5Sum(String path) {

    private byte[] getFileCrC(String path) {

        try {

            MessageDigest md = MessageDigest.getInstance("MD5");

            DigestInputStream dis = new DigestInputStream(new FileInputStream(path), md);

            dis.close();

            return md.digest();

            ZipFile zfile = new ZipFile(path);

            ZipEntry entry = zfile.getEntry("META-INF/MANIFEST.MF");

            if (entry == null) {

                Log.e(TAG, "Unable to get MANIFEST.MF from " + path);

                return null;

            }

            long crc = entry.getCrc();

            if (crc == -1) Log.e(TAG, "Unable to get CRC for " + path);

            return ByteBuffer.allocate(8).putLong(crc).array();

        } catch (Exception e) {

        }

        return null;