/*
 * Copyright (c) 1999, 2019, 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.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * 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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 * questions.
 */

package sun.security.ssl;

import java.security.*;
import java.util.*;
import sun.security.rsa.SunRsaSignEntries;
import static sun.security.util.SecurityConstants.PROVIDER_VER;
import static sun.security.provider.SunEntries.createAliases;

/**
 * The JSSE provider.
 *
 * The RSA implementation has been removed from JSSE, but we still need to
 * register the same algorithms for compatibility. We just point to the RSA
 * implementation in the SunRsaSign provider. This works because all classes
 * are in the bootclasspath and therefore loaded by the same classloader.
 *
 * SunJSSE now supports an experimental FIPS compliant mode when used with an
 * appropriate FIPS certified crypto provider. In FIPS mode, we:
 *  . allow only TLS 1.0 or later
 *  . allow only FIPS approved ciphersuites
 *  . perform all crypto in the FIPS crypto provider
 *
 * It is currently not possible to use both FIPS compliant SunJSSE and
 * standard JSSE at the same time because of the various static data structures
 * we use.
 *
 * However, we do want to allow FIPS mode to be enabled at runtime and without
 * editing the java.security file. That means we need to allow
 * Security.removeProvider("SunJSSE") to work, which creates an instance of
 * this class in non-FIPS mode. That is why we delay the selection of the mode
 * as long as possible. This is until we open an SSL/TLS connection and the
 * data structures need to be initialized or until SunJSSE is initialized in
 * FIPS mode.
 *
 */
public class SunJSSE extends java.security.Provider {

    private static final long serialVersionUID = 3231825739635378733L;

    private static String info = "Sun JSSE provider" +
        "(PKCS12, SunX509/PKIX key/trust factories, " +
        "SSLv3/TLSv1/TLSv1.1/TLSv1.2/TLSv1.3/DTLSv1.0/DTLSv1.2)";

    public SunJSSE() {
        super("SunJSSE", PROVIDER_VER, info);
        registerAlgorithms();
    }

    private void registerAlgorithms() {
        AccessController.doPrivileged((PrivilegedAction<Void>) () -> {
            doRegister();
            return null;
        });
    }

    private void ps(String type, String algo, String cn,
            List<String> aliases, HashMap<String, String> attrs) {
        putService(new Provider.Service(this, type, algo, cn, aliases, attrs));
    }

    private void doRegister() {
        Iterator<Provider.Service> rsaIter =
            new SunRsaSignEntries(this).iterator();
        while (rsaIter.hasNext()) {
            putService(rsaIter.next());
        }

        ps("Signature", "MD5andSHA1withRSA",
            "sun.security.ssl.RSASignature", null, null);

        ps("KeyManagerFactory", "SunX509",
            "sun.security.ssl.KeyManagerFactoryImpl$SunX509", null, null);
        ps("KeyManagerFactory", "NewSunX509",
            "sun.security.ssl.KeyManagerFactoryImpl$X509",
            createAliases("PKIX"), null);

        ps("TrustManagerFactory", "SunX509",
            "sun.security.ssl.TrustManagerFactoryImpl$SimpleFactory",
            null, null);
        ps("TrustManagerFactory", "PKIX",
            "sun.security.ssl.TrustManagerFactoryImpl$PKIXFactory",
            createAliases("SunPKIX", "X509", "X.509"), null);

        ps("SSLContext", "TLSv1",
            "sun.security.ssl.SSLContextImpl$TLS10Context",
            createAliases("SSLv3"), null);
        ps("SSLContext", "TLSv1.1",
            "sun.security.ssl.SSLContextImpl$TLS11Context", null, null);
        ps("SSLContext", "TLSv1.2",
            "sun.security.ssl.SSLContextImpl$TLS12Context", null, null);
        ps("SSLContext", "TLSv1.3",
            "sun.security.ssl.SSLContextImpl$TLS13Context", null, null);
        ps("SSLContext", "TLS",
            "sun.security.ssl.SSLContextImpl$TLSContext",
            createAliases("SSL"), null);

        ps("SSLContext", "DTLSv1.0",
            "sun.security.ssl.SSLContextImpl$DTLS10Context", null, null);
        ps("SSLContext", "DTLSv1.2",
            "sun.security.ssl.SSLContextImpl$DTLS12Context", null, null);
        ps("SSLContext", "DTLS",
            "sun.security.ssl.SSLContextImpl$DTLSContext", null, null);

        ps("SSLContext", "Default",
            "sun.security.ssl.SSLContextImpl$DefaultSSLContext", null, null);

        /*
         * KeyStore
         */
        ps("KeyStore", "PKCS12",
            "sun.security.pkcs12.PKCS12KeyStore", null, null);
    }
}