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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

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 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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 *

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 */

/**

 * @test

 * @bug 8146293 

 * @summary Test RSASSA-PSS Key related support such as KeyPairGenerator

 * and KeyFactory of the SunRsaSign provider

 */

import java.io.*;

import java.util.*;

import java.math.BigInteger;

import java.security.*;

import java.security.interfaces.*;

import java.security.spec.*;

public class TestPSSKeySupport {

    private static final String ALGO = "RSASSA-PSS";

    /**

     * Test that key1 (reference key) and key2 (key to be tested) are

     * equivalent

     */

    private static void testKey(Key key1, Key key2) throws Exception {

        if (key2.getAlgorithm().equals(ALGO) == false) {

            throw new Exception("Algorithm not " + ALGO);

        }

        if (key1 instanceof PublicKey) {

            if (key2.getFormat().equals("X.509") == false) {

                throw new Exception("Format not X.509");

            }

        } else if (key1 instanceof PrivateKey) {

            if (key2.getFormat().equals("PKCS#8") == false) {

                throw new Exception("Format not PKCS#8");

            }

        }

        if (key1.equals(key2) == false) {

            throw new Exception("Keys not equal");

        }

        if (Arrays.equals(key1.getEncoded(), key2.getEncoded()) == false) {

            throw new Exception("Encodings not equal");

        }

    }

    private static void testPublic(KeyFactory kf, PublicKey key) throws Exception {

        System.out.println("Testing public key...");

        PublicKey key2 = (PublicKey)kf.translateKey(key);

        KeySpec rsaSpec = kf.getKeySpec(key, RSAPublicKeySpec.class);

        PublicKey key3 = kf.generatePublic(rsaSpec);

        KeySpec x509Spec = kf.getKeySpec(key, X509EncodedKeySpec.class);

        PublicKey key4 = kf.generatePublic(x509Spec);

        KeySpec x509Spec2 = new X509EncodedKeySpec(key.getEncoded());

        PublicKey key5 = kf.generatePublic(x509Spec2);

        testKey(key, key);

        testKey(key, key2);

        testKey(key, key3);

        testKey(key, key4);

        testKey(key, key5);

    }

    private static void testPrivate(KeyFactory kf, PrivateKey key) throws Exception {

        System.out.println("Testing private key...");

        PrivateKey key2 = (PrivateKey)kf.translateKey(key);

        KeySpec rsaSpec = kf.getKeySpec(key, RSAPrivateCrtKeySpec.class);

        PrivateKey key3 = kf.generatePrivate(rsaSpec);

        KeySpec pkcs8Spec = kf.getKeySpec(key, PKCS8EncodedKeySpec.class);

        PrivateKey key4 = kf.generatePrivate(pkcs8Spec);

        KeySpec pkcs8Spec2 = new PKCS8EncodedKeySpec(key.getEncoded());

        PrivateKey key5 = kf.generatePrivate(pkcs8Spec2);

        testKey(key, key);

        testKey(key, key2);

        testKey(key, key3);

        testKey(key, key4);

        testKey(key, key5);

        KeySpec rsaSpec2 = kf.getKeySpec(key, RSAPrivateKeySpec.class);

        PrivateKey key6 = kf.generatePrivate(rsaSpec2);

        RSAPrivateKey rsaKey = (RSAPrivateKey)key;

        KeySpec rsaSpec3 = new RSAPrivateKeySpec(rsaKey.getModulus(),

            rsaKey.getPrivateExponent(), rsaKey.getParams());

        PrivateKey key7 = kf.generatePrivate(rsaSpec3);

        testKey(key6, key6);

        testKey(key6, key7);

    }

    private static void test(KeyFactory kf, Key key) throws Exception {

        if (key.getAlgorithm().equals(ALGO) == false) {

            throw new Exception("Error: key algo should be " + ALGO);

        }

        if (key instanceof PublicKey) {

            testPublic(kf, (PublicKey)key);

        } else if (key instanceof PrivateKey) {

            testPrivate(kf, (PrivateKey)key);

        }

    }

    private static void checkKeyPair(KeyPair kp) throws Exception {

        PublicKey pubKey = kp.getPublic();

        if (!(pubKey instanceof RSAPublicKey)) {

            throw new Exception("Error: public key should be RSAPublicKey");

        }

        PrivateKey privKey = kp.getPrivate();

        if (!(privKey instanceof RSAPrivateKey)) {

            throw new Exception("Error: private key should be RSAPrivateKey");

        }

    }

    public static void main(String[] args) throws Exception {

        KeyPairGenerator kpg =

            KeyPairGenerator.getInstance(ALGO, "SunRsaSign");

        // Algorithm-Independent Initialization

        kpg.initialize(2048);

        KeyPair kp = kpg.generateKeyPair();

        checkKeyPair(kp);

        BigInteger pubExp = ((RSAPublicKey)kp.getPublic()).getPublicExponent();

        // Algorithm-specific Initialization

        PSSParameterSpec params = new PSSParameterSpec("SHA-256", "MGF1", 

            MGF1ParameterSpec.SHA256, 32, 1);

        kpg.initialize(new RSAKeyGenParameterSpec(2048, pubExp, params));

        KeyPair kp2 = kpg.generateKeyPair();

        checkKeyPair(kp2);

        KeyFactory kf = KeyFactory.getInstance(ALGO, "SunRsaSign");

        test(kf, kp.getPublic());

        test(kf, kp.getPrivate());

    }

}