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The FIPS 140-2 Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms certified to FIPS 140-2 level 1. This jar contains the debug version JCE provider and low-level API for the BC-FJA version 1.0.2.3, FIPS Certificate #3514. Please note the debug jar is not certified.

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package org.bouncycastle.crypto.general;

import org.bouncycastle.crypto.internal.AsymmetricCipherKeyPair;
import org.bouncycastle.crypto.internal.params.EcPrivateKeyParameters;
import org.bouncycastle.crypto.internal.params.EcPublicKeyParameters;

class DSTU4145KeyPairGenerator
    extends EcKeyPairGenerator
{
    public AsymmetricCipherKeyPair generateKeyPair()
    {
        AsymmetricCipherKeyPair pair = super.generateKeyPair();

        EcPublicKeyParameters pub = (EcPublicKeyParameters)pair.getPublic();
        EcPrivateKeyParameters priv = (EcPrivateKeyParameters)pair.getPrivate();

        pub = new EcPublicKeyParameters(pub.getQ().negate(), pub.getParameters());

        return new AsymmetricCipherKeyPair(pub, priv);
    }
}