/*

 * Copyright (c) 2003, 2016, Oracle and/or its affiliates. All rights reserved.

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

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * 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

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

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

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @bug 4856968 7054918 8130181

 * @library ../testlibrary

 * @summary make sure getInstance() works correctly, including failover

 *   and delayed provider selection for Signatures

 * @author Andreas Sterbenz

 */

import java.util.*;

import java.security.*;

import java.security.cert.*;

public class GetInstance {

    private static void same(Provider p1, Provider p2) throws Exception {

        if (p1 != p2) {

            throw new Exception("Wrong provider");

        }

    }

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

        ProvidersSnapshot snapshot = ProvidersSnapshot.create();

        try {

            main0(args);

        } finally {

            snapshot.restore();

        }

    }

    public static void main0(String[] args) throws Exception {

        long start = System.currentTimeMillis();

        Provider foo = new FooProvider();

        Provider bar = new BarProvider();

        Provider baz = new BazProvider();

        Security.addProvider(foo);

        Security.addProvider(bar);

        Security.addProvider(baz);

        System.out.println("Testing MessageDigest.getInstance()...");

        MessageDigest m;

        m = MessageDigest.getInstance("foo");

        m = MessageDigest.getInstance("foo", "foo");

        m = MessageDigest.getInstance("foo", foo);

        System.out.println("Testing Signature.getInstance() for SPI...");

        Signature sig;

        PrivateKey privateKey = new FooPrivateKey();

        sig = Signature.getInstance("foo");

        same(foo, sig.getProvider());

        sig = Signature.getInstance("foo");

        sig.initSign(privateKey);

        same(foo, sig.getProvider());

        sig = Signature.getInstance("foo", "foo");

        sig.initSign(privateKey);

        same(foo, sig.getProvider());

        sig = Signature.getInstance("foo", foo);

        sig.initSign(privateKey);

        same(foo, sig.getProvider());

        System.out.println("Testing Signature.getInstance() for Signature...");

        sig = Signature.getInstance("fuu");

        same(foo, sig.getProvider());

        sig = Signature.getInstance("fuu");

        sig.initSign(privateKey);

        same(foo, sig.getProvider());

        sig = Signature.getInstance("fuu", "foo");

        sig.initSign(privateKey);

        same(foo, sig.getProvider());

        sig = Signature.getInstance("fuu", foo);

        sig.initSign(privateKey);

        same(foo, sig.getProvider());

        System.out.println("Testing CertStore.getInstance()...");

        CertStoreParameters params = new CollectionCertStoreParameters(Collections.EMPTY_LIST);

        CertStore cs;

        cs = CertStore.getInstance("foo", params);

        cs = CertStore.getInstance("foo", params, "foo");

        cs = CertStore.getInstance("foo", params, foo);

        System.out.println("Testing failover...");

        m = MessageDigest.getInstance("bar");

        same(m.getProvider(), baz);

        sig = Signature.getInstance("bar");

        same(sig.getProvider(), baz);

        cs = CertStore.getInstance("bar", params);

        same(cs.getProvider(), baz);

        System.out.println("Testing Signature delayed provider selection...");

        sig = Signature.getInstance("baz");

        sig.initVerify(new FooPublicKey());

        same(sig.getProvider(), baz);

        Provider.Service s = foo.getService("CertStore", "foo");

        s.newInstance(null);

        s.newInstance(params);

        try {

            s.newInstance(0);

            throw new Exception("call should not succeed");

        } catch (NoSuchAlgorithmException e) {

            e.printStackTrace();

            Throwable cause = e.getCause();

            if (cause instanceof InvalidParameterException == false) {

                throw new Exception("incorrect exception");

            }

        }

        long stop = System.currentTimeMillis();

        System.out.println("Done (" + (stop - start) + " ms).");

    }

    public static class FooProvider extends Provider {

        FooProvider() {

            super("foo", "1.0", "none");

            put("MessageDigest.foo", "GetInstance$FooDigest");

            put("CertStore.foo",     "GetInstance$FooStore");

            put("Signature.foo",     "GetInstance$FooSignatureSpi");

            put("Signature.fuu",     "GetInstance$BazSignature");

            // throws InvalidKeyException, skipped in delayed provider selection

            put("Signature.baz",     "GetInstance$BazSignatureSpi");

        }

    }

    public static class BarProvider extends Provider {

        BarProvider() {

            super("bar", "1.0", "none");

            // all entries invalid for failover

            put("MessageDigest.bar", "GetInstance$FooKey");

            put("Signature.bar",     "GetInstance$FooKey");

            put("Certstore.bar",     "GetInstance$FooKey");

            // not an SPI, skipped in delayed provider selection

            put("Signature.baz",     "GetInstance$BazSignature");

        }

    }

    public static class BazProvider extends Provider {

        BazProvider() {

            super("baz", "1.0", "none");

            put("MessageDigest.bar", "GetInstance$FooDigest");

            put("CertStore.bar",     "GetInstance$FooStore");

            put("Signature.bar",     "GetInstance$FooSignatureSpi");

            put("Signature.baz",     "GetInstance$FooSignatureSpi");

        }

    }

    public static class FooDigest extends MessageDigestSpi {

        public byte[] engineDigest() { return new byte[0]; }

        public void engineReset() {}

        public void engineUpdate(byte input) {}

        public void engineUpdate(byte[] b, int ofs, int len) {}

    }

    public static class FooStore extends CertStoreSpi {

        public FooStore(CertStoreParameters params) throws InvalidAlgorithmParameterException { super(params); }

        public Collection engineGetCertificates(CertSelector sel) { return Collections.EMPTY_LIST; }

        public Collection engineGetCRLs(CRLSelector sel) { return Collections.EMPTY_LIST; }

    }

    public static class BaseSignatureSpi extends SignatureSpi {

        protected void engineInitVerify(PublicKey publicKey) throws InvalidKeyException {

        }

        protected void engineInitSign(PrivateKey privateKey) throws InvalidKeyException {

        }

        protected void engineUpdate(byte b) throws SignatureException { }

        protected void engineUpdate(byte[] b, int off, int len) throws SignatureException { }

        protected byte[] engineSign() throws SignatureException {

            return new byte[0];

        }

        protected boolean engineVerify(byte[] sigBytes) throws SignatureException {

            return false;

        }

        protected void engineSetParameter(String param, Object value) throws InvalidParameterException {

        }

        protected Object engineGetParameter(String param) throws InvalidParameterException {

            return null;

        }

    }

    public static class BaseSignature extends Signature {

        BaseSignature(String s) {

            super(s);

        }

        protected void engineInitVerify(PublicKey publicKey) throws InvalidKeyException {

            //

        }

        protected void engineInitSign(PrivateKey privateKey) throws InvalidKeyException { }

        protected void engineUpdate(byte b) throws SignatureException { }

        protected void engineUpdate(byte[] b, int off, int len) throws SignatureException { }

        protected byte[] engineSign() throws SignatureException {

            return new byte[0];

        }

        protected boolean engineVerify(byte[] sigBytes) throws SignatureException {

            return false;

        }

        protected void engineSetParameter(String param, Object value) throws InvalidParameterException {

        }

        protected Object engineGetParameter(String param) throws InvalidParameterException {

            return null;

        }

    }

    public static abstract class FooKey implements Key {

        public String getFormat() { return null; }

        public byte[] getEncoded() { return null; }

        public String getAlgorithm() { return "foo"; }

    }

    public static class FooPrivateKey extends FooKey implements PrivateKey { }

    public static class FooPublicKey extends FooKey implements PublicKey { }

    public static class FooSignatureSpi extends BaseSignatureSpi {

        public FooSignatureSpi() {

            super();

            System.out.println("FooSignatureSpi constructor");

        }

    }

    public static class BazSignatureSpi extends BaseSignatureSpi {

        public BazSignatureSpi() {

            super();

            System.out.println("BazSignatureSpi constructor");

        }

        protected void engineInitVerify(PublicKey publicKey) throws InvalidKeyException {

            throw new InvalidKeyException("verify not supported");

        }

    }

    public static class BazSignature extends BaseSignature {

        public BazSignature() {

            super("baz");

            System.out.println("BazSignature constructor");

        }

    }

}