Example usage for com.google.common.io LittleEndianDataOutputStream writeShort

Introduction

In this page you can find the example usage for com.google.common.io LittleEndianDataOutputStream writeShort.

Prototype

@Override
public void writeShort(int v) throws IOException 

Source Link

Document

Writes a short as specified by DataOutputStream#writeShort(int) , except using little-endian byte order.

Usage

From source file:org.linguafranca.pwdb.kdbx.stream_3_1.KdbxSerializer.java

/**
 * Write a KdbxHeader to the output stream supplied. The header is updated with the
 * message digest of the written stream.
 * @param kdbxHeader the header to write and update
 * @param outputStream the output stream
 * @throws IOException on error//from w  ww . ja va  2 s.c  om
 */
public static void writeKdbxHeader(KdbxHeader kdbxHeader, OutputStream outputStream) throws IOException {
    MessageDigest messageDigest = Encryption.getMessageDigestInstance();
    DigestOutputStream digestOutputStream = new DigestOutputStream(outputStream, messageDigest);
    LittleEndianDataOutputStream ledos = new LittleEndianDataOutputStream(digestOutputStream);

    // write the magic number
    ledos.writeInt(SIG1);
    ledos.writeInt(SIG2);
    // write a file version
    ledos.writeInt(FILE_VERSION_32);

    ledos.writeByte(HeaderType.CIPHER_ID);
    ledos.writeShort(16);
    byte[] b = new byte[16];
    ByteBuffer bb = ByteBuffer.wrap(b);
    bb.putLong(kdbxHeader.getCipherUuid().getMostSignificantBits());
    bb.putLong(8, kdbxHeader.getCipherUuid().getLeastSignificantBits());
    ledos.write(b);

    ledos.writeByte(HeaderType.COMPRESSION_FLAGS);
    ledos.writeShort(4);
    ledos.writeInt(kdbxHeader.getCompressionFlags().ordinal());

    ledos.writeByte(HeaderType.MASTER_SEED);
    ledos.writeShort(kdbxHeader.getMasterSeed().length);
    ledos.write(kdbxHeader.getMasterSeed());

    ledos.writeByte(HeaderType.TRANSFORM_SEED);
    ledos.writeShort(kdbxHeader.getTransformSeed().length);
    ledos.write(kdbxHeader.getTransformSeed());

    ledos.writeByte(HeaderType.TRANSFORM_ROUNDS);
    ledos.writeShort(8);
    ledos.writeLong(kdbxHeader.getTransformRounds());

    ledos.writeByte(HeaderType.ENCRYPTION_IV);
    ledos.writeShort(kdbxHeader.getEncryptionIv().length);
    ledos.write(kdbxHeader.getEncryptionIv());

    ledos.writeByte(HeaderType.PROTECTED_STREAM_KEY);
    ledos.writeShort(kdbxHeader.getProtectedStreamKey().length);
    ledos.write(kdbxHeader.getProtectedStreamKey());

    ledos.writeByte(HeaderType.STREAM_START_BYTES);
    ledos.writeShort(kdbxHeader.getStreamStartBytes().length);
    ledos.write(kdbxHeader.getStreamStartBytes());

    ledos.writeByte(HeaderType.INNER_RANDOM_STREAM_ID);
    ledos.writeShort(4);
    ledos.writeInt(kdbxHeader.getProtectedStreamAlgorithm().ordinal());

    ledos.writeByte(HeaderType.END);
    ledos.writeShort(0);

    MessageDigest digest = digestOutputStream.getMessageDigest();
    kdbxHeader.setHeaderHash(digest.digest());
}

---