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The FIPS 140-2 Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms certified to FIPS 140-2 level 1. This jar contains the debug version JCE provider and low-level API for the BC-FJA version 1.0.2.3, FIPS Certificate #3514. Please note the debug jar is not certified.

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package org.bouncycastle.crypto.general;

import org.bouncycastle.util.Memoable;

/**
 * implementation of GOST R 34.11-2012 256-bit
 */
final class GOST3411_2012_256Digest
    extends GOST3411_2012Digest
{
    private final static byte[] IV = {
        0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
        0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
        0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
        0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
        0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
        0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
        0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01,
        0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01
    };

    public GOST3411_2012_256Digest()
    {
        super(IV);
    }

    public GOST3411_2012_256Digest(GOST3411_2012_256Digest other)
    {
        super(IV);
        reset(other);
    }

    public String getAlgorithmName()
    {
        return "GOST3411-2012-256";
    }

    public int getDigestSize()
    {
        return 32;
    }

    public int doFinal(byte[] out, int outOff)
    {
        byte[] result = new byte[64];
        super.doFinal(result, 0);

        System.arraycopy(result, 32, out, outOff, 32);

        return 32;
    }

    public Memoable copy()
    {
        return new GOST3411_2012_256Digest(this);
    }
}