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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 and up. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.crypto.digests;

import org.bouncycastle.util.Memoable;

/**
 * implementation of GOST R 34.11-2012 512-bit
 */
public class GOST3411_2012_512Digest
    extends GOST3411_2012Digest
{
    private final static byte[] IV = {
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
        0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
    };

    public GOST3411_2012_512Digest()
    {
        super(IV);
    }

    public GOST3411_2012_512Digest(GOST3411_2012_512Digest other)
    {
        super(IV);
        reset(other);
    }

    public String getAlgorithmName()
    {
        return "GOST3411-2012-512";
    }

    public int getDigestSize()
    {
        return 64;
    }

    public Memoable copy()
    {
        return new GOST3411_2012_512Digest(this);
    }
}