org.bouncycastle.crypto.params.XDHUPublicParameters Maven / Gradle / Ivy
package org.bouncycastle.crypto.params;
import org.bouncycastle.crypto.CipherParameters;
/**
* Parameters holder for public unified static/ephemeral agreement using Edwards Curves.
*/
public class XDHUPublicParameters
implements CipherParameters
{
private AsymmetricKeyParameter staticPublicKey;
private AsymmetricKeyParameter ephemeralPublicKey;
public XDHUPublicParameters(
AsymmetricKeyParameter staticPublicKey,
AsymmetricKeyParameter ephemeralPublicKey)
{
if (staticPublicKey == null)
{
throw new NullPointerException("staticPublicKey cannot be null");
}
if (!(staticPublicKey instanceof X448PublicKeyParameters || staticPublicKey instanceof X25519PublicKeyParameters))
{
throw new IllegalArgumentException("only X25519 and X448 paramaters can be used");
}
if (ephemeralPublicKey == null)
{
throw new NullPointerException("ephemeralPublicKey cannot be null");
}
if (!staticPublicKey.getClass().isAssignableFrom(ephemeralPublicKey.getClass()))
{
throw new IllegalArgumentException("static and ephemeral public keys have different domain parameters");
}
this.staticPublicKey = staticPublicKey;
this.ephemeralPublicKey = ephemeralPublicKey;
}
public AsymmetricKeyParameter getStaticPublicKey()
{
return staticPublicKey;
}
public AsymmetricKeyParameter getEphemeralPublicKey()
{
return ephemeralPublicKey;
}
}