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package org.bouncycastle.jcajce.provider.symmetric;
import java.security.AlgorithmParameters;
import java.security.InvalidAlgorithmParameterException;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import javax.crypto.spec.IvParameterSpec;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.crypto.BufferedBlockCipher;
import org.bouncycastle.crypto.CipherKeyGenerator;
import org.bouncycastle.crypto.engines.GOST28147Engine;
import org.bouncycastle.crypto.macs.GOST28147Mac;
import org.bouncycastle.crypto.modes.CBCBlockCipher;
import org.bouncycastle.crypto.modes.GCFBBlockCipher;
import org.bouncycastle.jcajce.provider.config.ConfigurableProvider;
import org.bouncycastle.jcajce.provider.symmetric.util.BaseAlgorithmParameterGenerator;
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.symmetric.util.IvAlgorithmParameters;
import org.bouncycastle.jcajce.provider.util.AlgorithmProvider;
public final class GOST28147
{
private GOST28147()
{
}
public static class ECB
extends BaseBlockCipher
{
public ECB()
{
super(new GOST28147Engine());
}
}
public static class CBC
extends BaseBlockCipher
{
public CBC()
{
super(new CBCBlockCipher(new GOST28147Engine()), 64);
}
}
public static class GCFB
extends BaseBlockCipher
{
public GCFB()
{
super(new BufferedBlockCipher(new GCFBBlockCipher(new GOST28147Engine())), 64);
}
}
/**
* GOST28147
*/
public static class Mac
extends BaseMac
{
public Mac()
{
super(new GOST28147Mac());
}
}
public static class KeyGen
extends BaseKeyGenerator
{
public KeyGen()
{
this(256);
}
public KeyGen(int keySize)
{
super("GOST28147", keySize, new CipherKeyGenerator());
}
}
public static class AlgParamGen
extends BaseAlgorithmParameterGenerator
{
protected void engineInit(
AlgorithmParameterSpec genParamSpec,
SecureRandom random)
throws InvalidAlgorithmParameterException
{
throw new InvalidAlgorithmParameterException("No supported AlgorithmParameterSpec for GOST28147 parameter generation.");
}
protected AlgorithmParameters engineGenerateParameters()
{
byte[] iv = new byte[16];
if (random == null)
{
random = new SecureRandom();
}
random.nextBytes(iv);
AlgorithmParameters params;
try
{
params = createParametersInstance("GOST28147");
params.init(new IvParameterSpec(iv));
}
catch (Exception e)
{
throw new RuntimeException(e.getMessage());
}
return params;
}
}
public static class AlgParams
extends IvAlgorithmParameters
{
protected String engineToString()
{
return "GOST IV";
}
}
public static class Mappings
extends AlgorithmProvider
{
private static final String PREFIX = GOST28147.class.getName();
public Mappings()
{
}
public void configure(ConfigurableProvider provider)
{
provider.addAlgorithm("Cipher.GOST28147", PREFIX + "$ECB");
provider.addAlgorithm("Alg.Alias.Cipher.GOST", "GOST28147");
provider.addAlgorithm("Alg.Alias.Cipher.GOST-28147", "GOST28147");
provider.addAlgorithm("Cipher." + CryptoProObjectIdentifiers.gostR28147_gcfb, PREFIX + "$GCFB");
provider.addAlgorithm("KeyGenerator.GOST28147", PREFIX + "$KeyGen");
provider.addAlgorithm("Alg.Alias.KeyGenerator.GOST", "GOST28147");
provider.addAlgorithm("Alg.Alias.KeyGenerator.GOST-28147", "GOST28147");
provider.addAlgorithm("Alg.Alias.KeyGenerator." + CryptoProObjectIdentifiers.gostR28147_gcfb, "GOST28147");
provider.addAlgorithm("Mac.GOST28147MAC", PREFIX + "$Mac");
provider.addAlgorithm("Alg.Alias.Mac.GOST28147", "GOST28147MAC");
}
}
}
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