io.gatling.recorder.internal.bouncycastle.pqc.crypto.hqc.HQCKEMGenerator Maven / Gradle / Ivy
package io.gatling.recorder.internal.bouncycastle.pqc.crypto.hqc;
import java.security.SecureRandom;
import io.gatling.recorder.internal.bouncycastle.crypto.EncapsulatedSecretGenerator;
import io.gatling.recorder.internal.bouncycastle.crypto.SecretWithEncapsulation;
import io.gatling.recorder.internal.bouncycastle.crypto.params.AsymmetricKeyParameter;
import io.gatling.recorder.internal.bouncycastle.pqc.crypto.util.SecretWithEncapsulationImpl;
import io.gatling.recorder.internal.bouncycastle.util.Arrays;
public class HQCKEMGenerator
implements EncapsulatedSecretGenerator
{
private final SecureRandom sr;
public HQCKEMGenerator(SecureRandom random)
{
this.sr = random;
}
public SecretWithEncapsulation generateEncapsulated(AsymmetricKeyParameter recipientKey)
{
HQCPublicKeyParameters key = (HQCPublicKeyParameters)recipientKey;
HQCEngine engine = key.getParameters().getEngine();
byte[] K = new byte[key.getParameters().getSHA512_BYTES()];
byte[] u = new byte[key.getParameters().getN_BYTES()];
byte[] v = new byte[key.getParameters().getN1N2_BYTES()];
byte[] d = new byte[key.getParameters().getSHA512_BYTES()];
byte[] salt = new byte[key.getParameters().getSALT_SIZE_BYTES()];
byte[] pk = key.getPublicKey();
byte[] seed = new byte[48];
sr.nextBytes(seed);
engine.encaps(u, v, K, d, pk, seed, salt);
byte[] cipherText = Arrays.concatenate(u, v, d, salt);
return new SecretWithEncapsulationImpl(Arrays.copyOfRange(K, 0, key.getParameters().getK()), cipherText);
}
}