/*

 * Copyright (c) 2006, 2007, 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

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 */

/**

 * @test

 * @bug 6405536 6414980

 * @summary Make sure that we can parse certificates using various named curves

 *   and verify their signatures

 * @author Andreas Sterbenz

 * @library ..

 */

import java.io.*;

import java.util.*;

import java.security.cert.*;

import java.security.*;

import java.security.interfaces.*;

import javax.security.auth.x500.X500Principal;

public class ReadCertificates extends PKCS11Test {

    private static CertificateFactory factory;

    private static SecureRandom random;

    private static Collection<X509Certificate> readCertificates(File file) throws Exception {

        System.out.println("Loading " + file.getName() + "...");

        InputStream in = new FileInputStream(file);

        Collection<X509Certificate> certs = (Collection<X509Certificate>)factory.generateCertificates(in);

        in.close();

        return certs;

    }

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

        main(new ReadCertificates());

    }

    public void main(Provider p) throws Exception {

        if (p.getService("Signature", "SHA1withECDSA") == null) {

            System.out.println("Provider does not support ECDSA, skipping...");

            return;

        }

        Security.insertProviderAt(p, 1);

        random = new SecureRandom();

        factory = CertificateFactory.getInstance("X.509");

        try {

            // clear certificate cache in from a previous run with a different

            // provider (undocumented hack for the Sun provider)

            factory.generateCertificate(null);

        } catch (CertificateException e) {

            // ignore

        }

        Map<X500Principal,X509Certificate> certs = new LinkedHashMap<X500Principal,X509Certificate>();

        File dir = new File(BASE, "certs");

        File closedDir = new File(CLOSED_BASE, "certs");

        File[] files = concat(dir.listFiles(), closedDir.listFiles());

        Arrays.sort(files);

        for (File file : files) {

            if (file.isFile() == false) {

                continue;

            }

            Collection<X509Certificate> certList = readCertificates(file);

            for (X509Certificate cert : certList) {

                X509Certificate old = certs.put(cert.getSubjectX500Principal(), cert);

                if (old != null) {

                    System.out.println("Duplicate subject:");

                    System.out.println("Old Certificate: " + old);

                    System.out.println("New Certificate: " + cert);

                    throw new Exception(file.getPath());

                }

            }

        }

        System.out.println("OK: " + certs.size() + " certificates.");

        for (X509Certificate cert : certs.values()) {

            X509Certificate issuer = certs.get(cert.getIssuerX500Principal());

            System.out.println("Verifying " + cert.getSubjectX500Principal() + "...");

            PublicKey key = issuer.getPublicKey();

            // First try the provider under test (if it does not support the

            // necessary algorithm then try any registered provider).

            try {

                cert.verify(key, p.getName());

            } catch (NoSuchAlgorithmException e) {

                System.out.println("Warning: " + e.getMessage() +

                ". Trying another provider...");

                cert.verify(key);

            }

        }

        // try some random invalid signatures to make sure we get the correct

        // error

        System.out.println("Checking incorrect signatures...");

        List<X509Certificate> certList = new ArrayList<X509Certificate>(certs.values());

        for (int i = 0; i < 20; i++) {

            X509Certificate cert, signer;

            do {

                cert = getRandomCert(certList);

                signer = getRandomCert(certList);

            } while (cert.getIssuerX500Principal().equals(signer.getSubjectX500Principal()));

            try {

                cert.verify(signer.getPublicKey());

                throw new Exception("Verified invalid signature");

            } catch (SignatureException e) {

                System.out.println("OK: " + e);

            } catch (InvalidKeyException e) {

                System.out.println("OK: " + e);

            }

        }

        Security.removeProvider(p.getName());

        System.out.println("OK");

    }

    private static X509Certificate getRandomCert(List<X509Certificate> certs) {

        int n = random.nextInt(certs.size());

        return certs.get(n);

    }

}