Examples with Adler32 java.util.zip.Adler32 used on opensource projects

Example 6 with Adler32

use of java.util.zip.Adler32 in project atlas by alibaba.

the class DexFile method calcChecksum.

/**
     * Calculates the checksum for the {@code .dex} file in the
     * given array, and modify the array to contain it.
     *
     * @param bytes {@code non-null;} the bytes of the file
     */
private static void calcChecksum(byte[] bytes) {
    Adler32 a32 = new Adler32();
    a32.update(bytes, 12, bytes.length - 12);
    int sum = (int) a32.getValue();
    bytes[8] = (byte) sum;
    bytes[9] = (byte) (sum >> 8);
    bytes[10] = (byte) (sum >> 16);
    bytes[11] = (byte) (sum >> 24);
}

Example 7 with Adler32

use of java.util.zip.Adler32 in project atlas by alibaba.

the class Dex method computeChecksum.

/**
     * Returns the checksum of all but the first 12 bytes of {@code dex}.
     */
public int computeChecksum() throws IOException {
    Adler32 adler32 = new Adler32();
    byte[] buffer = new byte[8192];
    // positioned ByteBuffers aren't thread safe
    ByteBuffer data = this.data.duplicate();
    data.limit(data.capacity());
    data.position(CHECKSUM_OFFSET + SizeOf.CHECKSUM);
    while (data.hasRemaining()) {
        int count = Math.min(buffer.length, data.remaining());
        data.get(buffer, 0, count);
        adler32.update(buffer, 0, count);
    }
    return (int) adler32.getValue();
}

Example 8 with Adler32

use of java.util.zip.Adler32 in project dex2jar by pxb1988.

the class DexFileWriter method updateChecksum.

public static void updateChecksum(ByteBuffer buffer, int size) {
    byte[] data = buffer.array();
    MessageDigest digest;
    try {
        digest = MessageDigest.getInstance("SHA-1");
    } catch (NoSuchAlgorithmException e) {
        throw new AssertionError();
    }
    digest.update(data, 32, size - 32);
    byte[] sha1 = digest.digest();
    System.arraycopy(sha1, 0, data, 12, sha1.length);
    Adler32 adler32 = new Adler32();
    adler32.update(data, 12, size - 12);
    int v = (int) adler32.getValue();
    buffer.position(8);
    buffer.putInt(v);
}

Example 9 with Adler32

use of java.util.zip.Adler32 in project ratpack by ratpack.

the class Adler32Checksummer method apply.

/**
   * Algorythm implementation.
   *
   * @param is {@code InputStream} of file to calculate checksum
   * @return checksum string
   */
@Override
public String apply(InputStream is) throws Exception {
    byte[] buffer = new byte[BUFFER_SIZE];
    Checksum checksum = new Adler32();
    int read = is.read(buffer, 0, BUFFER_SIZE);
    while (read != -1) {
        checksum.update(buffer, 0, read);
        read = is.read(buffer, 0, BUFFER_SIZE);
    }
    return Long.toHexString(checksum.getValue());
}

Example 10 with Adler32

use of java.util.zip.Adler32 in project exhibitor by soabase.

the class ZooKeeperLogParser method parse.

public void parse(LogEntryReceiver receiver) throws Exception {
    if (!validHeader) {
        throw new Exception("Invalid magic number for");
    }
    while (true) {
        long crcValue;
        byte[] bytes;
        try {
            crcValue = logStream.readLong("crcvalue");
            bytes = logStream.readBuffer("txnEntry");
        } catch (EOFException e) {
            break;
        }
        if (bytes.length == 0) {
            // empty transaction
            break;
        }
        Checksum crc = new Adler32();
        crc.update(bytes, 0, bytes.length);
        if (crcValue != crc.getValue()) {
            throw new IOException("CRC doesn't match " + crcValue + " vs " + crc.getValue());
        }
        InputArchive iab = BinaryInputArchive.getArchive(new ByteArrayInputStream(bytes));
        TxnHeader hdr = new TxnHeader();
        Record record = useOldDeserializeMethod ? (Record) deserializeTxnMethod.invoke(null, iab, hdr) : (Record) deserializeTxnMethod.invoke(null, bytes, hdr);
        if (logStream.readByte("EOR") != 'B') {
            // partial transaction
            break;
        }
        receiver.receiveEntry(hdr, record);
    }
}