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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.8 and up. Note: this package includes the NTRU encryption algorithms.
package org.bouncycastle.pqc.jcajce.provider.frodo;
import java.security.InvalidAlgorithmParameterException;
import java.security.KeyPair;
import java.security.SecureRandom;
import java.security.spec.AlgorithmParameterSpec;
import java.util.HashMap;
import java.util.Map;
import org.bouncycastle.crypto.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.CryptoServicesRegistrar;
import org.bouncycastle.pqc.crypto.frodo.FrodoKeyGenerationParameters;
import org.bouncycastle.pqc.crypto.frodo.FrodoKeyPairGenerator;
import org.bouncycastle.pqc.crypto.frodo.FrodoParameters;
import org.bouncycastle.pqc.crypto.frodo.FrodoPrivateKeyParameters;
import org.bouncycastle.pqc.crypto.frodo.FrodoPublicKeyParameters;
import org.bouncycastle.pqc.jcajce.provider.util.SpecUtil;
import org.bouncycastle.pqc.jcajce.spec.FrodoParameterSpec;
public class FrodoKeyPairGeneratorSpi
extends java.security.KeyPairGenerator
{
private static Map parameters = new HashMap();
static
{
parameters.put(FrodoParameterSpec.frodokem19888r3.getName(), FrodoParameters.frodokem19888r3);
parameters.put(FrodoParameterSpec.frodokem19888shaker3.getName(), FrodoParameters.frodokem19888shaker3);
parameters.put(FrodoParameterSpec.frodokem31296r3.getName(), FrodoParameters.frodokem31296r3);
parameters.put(FrodoParameterSpec.frodokem31296shaker3.getName(), FrodoParameters.frodokem31296shaker3);
parameters.put(FrodoParameterSpec.frodokem43088r3.getName(), FrodoParameters.frodokem43088r3);
parameters.put(FrodoParameterSpec.frodokem43088shaker3.getName(), FrodoParameters.frodokem43088shaker3);
}
FrodoKeyGenerationParameters param;
FrodoKeyPairGenerator engine = new FrodoKeyPairGenerator();
SecureRandom random = CryptoServicesRegistrar.getSecureRandom();
boolean initialised = false;
public FrodoKeyPairGeneratorSpi()
{
super("Frodo");
}
public void initialize(
int strength,
SecureRandom random)
{
throw new IllegalArgumentException("use AlgorithmParameterSpec");
}
public void initialize(
AlgorithmParameterSpec params,
SecureRandom random)
throws InvalidAlgorithmParameterException
{
if (!(params instanceof FrodoParameterSpec))
{
throw new InvalidAlgorithmParameterException("parameter object not a FrodoParameterSpec");
}
param = new FrodoKeyGenerationParameters(random, (FrodoParameters)parameters.get(getNameFromParams(params)));
engine.init(param);
initialised = true;
}
private static String getNameFromParams(AlgorithmParameterSpec paramSpec)
throws InvalidAlgorithmParameterException
{
if (paramSpec instanceof FrodoParameterSpec)
{
FrodoParameterSpec frodoParams = (FrodoParameterSpec)paramSpec;
return frodoParams.getName();
}
else
{
return SpecUtil.getNameFrom(paramSpec);
}
}
public KeyPair generateKeyPair()
{
if (!initialised)
{
param = new FrodoKeyGenerationParameters(random, FrodoParameters.frodokem43088shaker3);
engine.init(param);
initialised = true;
}
AsymmetricCipherKeyPair pair = engine.generateKeyPair();
FrodoPublicKeyParameters pub = (FrodoPublicKeyParameters)pair.getPublic();
FrodoPrivateKeyParameters priv = (FrodoPrivateKeyParameters)pair.getPrivate();
return new KeyPair(new BCFrodoPublicKey(pub), new BCFrodoPrivateKey(priv));
}
}