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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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import jdk.test.lib.Asserts;
import sun.security.util.InternalPrivateKey;

import java.security.*;
import java.security.spec.ECGenParameterSpec;
import java.util.Arrays;
import java.util.List;

/*
 * @test
 * @bug 8305310
 * @library /test/lib
 * @summary Calculate PublicKey from PrivateKey
 * @modules java.base/sun.security.util
 */
public class Correctness {
    public static void main(String[] args) throws Exception {
        for (String alg : List.of("secp256r1", "secp384r1", "secp521r1",
                "X25519", "X448")) {
            KeyPairGenerator g;
            if (alg.startsWith("X")) {
                g = KeyPairGenerator.getInstance(alg);
            } else {
                g = KeyPairGenerator.getInstance("EC");
                g.initialize(new ECGenParameterSpec(alg));
            }
            KeyPair kp = g.generateKeyPair();
            PublicKey p1 = kp.getPublic();
            PrivateKey s1 = kp.getPrivate();

            if (s1 instanceof InternalPrivateKey ipk) {
                PublicKey p2 = ipk.calculatePublicKey();
                Asserts.assertTrue(Arrays.equals(p2.getEncoded(), p1.getEncoded()));
                Asserts.assertEQ(p2.getAlgorithm(), p1.getAlgorithm());
                Asserts.assertEQ(p2.getFormat(), p1.getFormat());
            } else {
                throw new RuntimeException("Not an InternalPrivateKey: "
                        + s1.getClass());
            }
        }
    }
}