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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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/*
 * @test
 * @bug 8331008
 * @library /test/lib
 * @run testng KDFDelayedProviderSyncTest
 * @summary multi-threading test for KDF
 * @enablePreview
 */

import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

import javax.crypto.KDF;
import javax.crypto.SecretKey;
import javax.crypto.spec.HKDFParameterSpec;
import java.math.BigInteger;
import java.security.InvalidAlgorithmParameterException;
import java.security.NoSuchAlgorithmException;
import java.security.spec.AlgorithmParameterSpec;
import java.util.HexFormat;

public class KDFDelayedProviderSyncTest {
    KDF kdfUnderTest;
    byte[] ikm = new BigInteger("0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b0b",
                                16).toByteArray();
    byte[] salt = new BigInteger("000102030405060708090a0b0c",
                                 16).toByteArray();
    byte[] info = new BigInteger("f0f1f2f3f4f5f6f7f8f9", 16).toByteArray();
    AlgorithmParameterSpec derivationSpec =
        HKDFParameterSpec.ofExtract().addIKM(ikm).addSalt(salt).thenExpand(
            info, 42);
    String expectedResult =
        "666b33562ebc5e2f041774192e0534efca06f82a5fca17ec8c6ae1b9f5466adba1d77d06480567ddd2d1";

    @BeforeClass
    public void setUp() throws NoSuchAlgorithmException {
        kdfUnderTest = KDF.getInstance("HKDF-SHA256");
    }

    @Test(threadPoolSize = 50, invocationCount = 100)
    public void testDerive()
        throws InvalidAlgorithmParameterException, NoSuchAlgorithmException {
        SecretKey result = kdfUnderTest.deriveKey("Generic", derivationSpec);
        assert (HexFormat.of().formatHex(result.getEncoded()).equals(
            expectedResult));

        byte[] resultData = kdfUnderTest.deriveData(derivationSpec);
        assert (HexFormat.of().formatHex(resultData).equals(expectedResult));
    }
}