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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.jcajce.provider.symmetric;

import org.bouncycastle.crypto.BufferedBlockCipher;
import org.bouncycastle.crypto.CipherKeyGenerator;
import org.bouncycastle.crypto.engines.GOST3412_2015Engine;
import org.bouncycastle.crypto.macs.CMac;
import org.bouncycastle.crypto.modes.G3413CBCBlockCipher;
import org.bouncycastle.crypto.modes.G3413CFBBlockCipher;
import org.bouncycastle.crypto.modes.G3413CTRBlockCipher;
import org.bouncycastle.crypto.modes.G3413OFBBlockCipher;
import org.bouncycastle.jcajce.provider.config.ConfigurableProvider;
import org.bouncycastle.jcajce.provider.symmetric.util.BaseBlockCipher;
import org.bouncycastle.jcajce.provider.symmetric.util.BaseKeyGenerator;
import org.bouncycastle.jcajce.provider.symmetric.util.BaseMac;
import org.bouncycastle.jcajce.provider.util.AlgorithmProvider;


public class GOST3412_2015
{
    public static class ECB
        extends BaseBlockCipher
    {
        public ECB()
        {
            super(new GOST3412_2015Engine());
        }
    }

    public static class CBC
        extends BaseBlockCipher
    {
        public CBC()
        {
            super(new G3413CBCBlockCipher(new GOST3412_2015Engine()), false, 128);
        }
    }

    public static class GCFB
        extends BaseBlockCipher
    {
        public GCFB()
        {
            super(new BufferedBlockCipher(new G3413CFBBlockCipher(new GOST3412_2015Engine())), false, 128);
        }
    }

    public static class GCFB8
        extends BaseBlockCipher
    {
        public GCFB8()
        {
            super(new BufferedBlockCipher(new G3413CFBBlockCipher(new GOST3412_2015Engine(), 8)), false, 128);
        }
    }

    public static class OFB
        extends BaseBlockCipher
    {
        public OFB()
        {
            super(new BufferedBlockCipher(new G3413OFBBlockCipher(new GOST3412_2015Engine())), false, 128);
        }

    }

    public static class CTR
        extends BaseBlockCipher
    {
        public CTR()
        {
            super(new BufferedBlockCipher(new G3413CTRBlockCipher(new GOST3412_2015Engine())), true,64);
        }

    }

    /**
     * GOST3412 2015 CMAC( OMAC1)
     */
    public static class Mac
        extends BaseMac
    {
        public Mac()
        {
            super(new CMac(new GOST3412_2015Engine()));
        }
    }


    public static class KeyGen
        extends BaseKeyGenerator
    {
        public KeyGen()
        {
            this(256);
        }

        public KeyGen(int keySize)
        {
            super("GOST3412-2015", keySize, new CipherKeyGenerator());
        }
    }

    public static class Mappings
        extends AlgorithmProvider
    {
        private static final String PREFIX = GOST3412_2015.class.getName();

        public Mappings()
        {
        }

        public void configure(ConfigurableProvider provider)
        {
            provider.addAlgorithm("Cipher.GOST3412-2015", PREFIX + "$ECB");
            provider.addAlgorithm("Cipher.GOST3412-2015/CFB", PREFIX + "$GCFB");
            provider.addAlgorithm("Cipher.GOST3412-2015/CFB8", PREFIX + "$GCFB8");
            provider.addAlgorithm("Cipher.GOST3412-2015/OFB", PREFIX + "$OFB");
            provider.addAlgorithm("Cipher.GOST3412-2015/CBC", PREFIX + "$CBC");
            provider.addAlgorithm("Cipher.GOST3412-2015/CTR", PREFIX + "$CTR");

            provider.addAlgorithm("KeyGenerator.GOST3412-2015", PREFIX + "$KeyGen");;

            provider.addAlgorithm("Mac.GOST3412MAC", PREFIX + "$Mac");
            provider.addAlgorithm("Alg.Alias.Mac.GOST3412-2015", "GOST3412MAC");
        }
    }


}