com.distrimind.bouncycastle.pqc.legacy.crypto.sike.SIKEKeyPairGenerator Maven / Gradle / Ivy
package com.distrimind.bouncycastle.pqc.legacy.crypto.sike;
import java.security.SecureRandom;
import com.distrimind.bouncycastle.crypto.AsymmetricCipherKeyPair;
import com.distrimind.bouncycastle.crypto.AsymmetricCipherKeyPairGenerator;
import com.distrimind.bouncycastle.crypto.CryptoServicePurpose;
import com.distrimind.bouncycastle.crypto.CryptoServicesRegistrar;
import com.distrimind.bouncycastle.crypto.KeyGenerationParameters;
import com.distrimind.bouncycastle.crypto.constraints.DefaultServiceProperties;
public class SIKEKeyPairGenerator
implements AsymmetricCipherKeyPairGenerator
{
private SIKEKeyGenerationParameters sikeParams;
private SecureRandom random;
private void initialize(KeyGenerationParameters param)
{
this.sikeParams = (SIKEKeyGenerationParameters) param;
this.random = param.getRandom();
}
private AsymmetricCipherKeyPair genKeyPair()
{
// -DM System.err.println
System.err.println("WARNING: the SIKE algorithm is only for research purposes, insecure");
CryptoServicesRegistrar.checkConstraints(new DefaultServiceProperties("SIKEKeyGen", 0, sikeParams.getParameters(), CryptoServicePurpose.KEYGEN));
SIKEEngine engine = sikeParams.getParameters().getEngine();
byte[] sk = new byte[engine.getPrivateKeySize()];
byte[] pk = new byte[engine.getPublicKeySize()];
engine.crypto_kem_keypair(pk, sk, random);
SIKEPublicKeyParameters pubKey = new SIKEPublicKeyParameters(sikeParams.getParameters(), pk);
SIKEPrivateKeyParameters privKey = new SIKEPrivateKeyParameters(sikeParams.getParameters(), sk);
return new AsymmetricCipherKeyPair(pubKey, privKey);
}
public void init(KeyGenerationParameters param)
{
this.initialize(param);
}
public AsymmetricCipherKeyPair generateKeyPair()
{
return genKeyPair();
}
}