org.bouncycastle.crypto.params.SM2KeyExchangePublicParameters Maven / Gradle / Ivy
package org.bouncycastle.crypto.params;
import org.bouncycastle.crypto.CipherParameters;
/**
* Public parameters for an SM2 key exchange. In this case the ephemeralPublicKey provides the random point used in the algorithm.
*/
public class SM2KeyExchangePublicParameters
implements CipherParameters
{
private final ECPublicKeyParameters staticPublicKey;
private final ECPublicKeyParameters ephemeralPublicKey;
public SM2KeyExchangePublicParameters(
ECPublicKeyParameters staticPublicKey,
ECPublicKeyParameters ephemeralPublicKey)
{
if (staticPublicKey == null)
{
throw new NullPointerException("staticPublicKey cannot be null");
}
if (ephemeralPublicKey == null)
{
throw new NullPointerException("ephemeralPublicKey cannot be null");
}
if (!staticPublicKey.getParameters().equals(ephemeralPublicKey.getParameters()))
{
throw new IllegalArgumentException("Static and ephemeral public keys have different domain parameters");
}
this.staticPublicKey = staticPublicKey;
this.ephemeralPublicKey = ephemeralPublicKey;
}
public ECPublicKeyParameters getStaticPublicKey()
{
return staticPublicKey;
}
public ECPublicKeyParameters getEphemeralPublicKey()
{
return ephemeralPublicKey;
}
}