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	/*
	* Copyright (c) 1999, 2020, 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
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/


	package sun.security.ssl;

	import static sun.security.util.SecurityConstants.PROVIDER_VER;

	import java.security.*;

	/**
	* 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 abstract 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)";

	private static String fipsInfo =
	"Sun JSSE provider (FIPS mode, crypto provider ";

	// tri-valued flag:
	// null := no final decision made
	// false := data structures initialized in non-FIPS mode
	// true := data structures initialized in FIPS mode
	private static Boolean fips;

	// the FIPS certificate crypto provider that we use to perform all crypto
	// operations. null in non-FIPS mode
	static java.security.Provider cryptoProvider;

	protected static synchronized boolean isFIPS() {
	if (fips == null) {
	fips = false;
	}
	return fips;
	}

	// ensure we can use FIPS mode using the specified crypto provider.
	// enable FIPS mode if not already enabled.
	private static synchronized void ensureFIPS(java.security.Provider p) {
	if (fips == null) {
	fips = true;
	cryptoProvider = p;
	} else {
	if (fips == false) {
	throw new ProviderException
	("SunJSSE already initialized in non-FIPS mode");
	}
	if (cryptoProvider != p) {
	throw new ProviderException
	("SunJSSE already initialized with FIPS crypto provider "
	+ cryptoProvider);
	}
	}
	}

	// standard constructor
	protected SunJSSE() {
	super("SunJSSE", 1.8d, info);
	subclassCheck();
	if (Boolean.TRUE.equals(fips)) {
	throw new ProviderException
	("SunJSSE is already initialized in FIPS mode");
	}
	registerAlgorithms(false);
	}

	// preferred constructor to enable FIPS mode at runtime
	protected SunJSSE(java.security.Provider cryptoProvider){
	this(checkNull(cryptoProvider), cryptoProvider.getName());
	}

	// constructor to enable FIPS mode from java.security file
	protected SunJSSE(String cryptoProvider){
	this(null, checkNull(cryptoProvider));
	}

	private static <T> T checkNull(T t) {
	if (t == null) {
	throw new ProviderException("cryptoProvider must not be null");
	}
	return t;
	}

	private SunJSSE(java.security.Provider cryptoProvider,
	String providerName) {
	super("SunJSSE", PROVIDER_VER, fipsInfo + providerName + ")");
	subclassCheck();
	if (cryptoProvider == null) {
	// Calling Security.getProvider() will cause other providers to be
	// loaded. That is not good but unavoidable here.
	cryptoProvider = Security.getProvider(providerName);
	if (cryptoProvider == null) {
	throw new ProviderException
	("Crypto provider not installed: " + providerName);
	}
	}
	ensureFIPS(cryptoProvider);
	registerAlgorithms(true);
	}

	private void registerAlgorithms(final boolean isfips) {
	AccessController.doPrivileged(new PrivilegedAction<Object>() {
	@Override
	public Object run() {
	doRegister(isfips);
	return null;
	}
	});
	}

	private void doRegister(boolean isfips) {
	if (isfips == false) {
	put("KeyFactory.RSA",
	"sun.security.rsa.RSAKeyFactory$Legacy");
	put("Alg.Alias.KeyFactory.1.2.840.113549.1.1", "RSA");
	put("Alg.Alias.KeyFactory.OID.1.2.840.113549.1.1", "RSA");

	put("KeyPairGenerator.RSA",
	"sun.security.rsa.RSAKeyPairGenerator$Legacy");
	put("Alg.Alias.KeyPairGenerator.1.2.840.113549.1.1", "RSA");
	put("Alg.Alias.KeyPairGenerator.OID.1.2.840.113549.1.1", "RSA");

	put("Signature.MD2withRSA",
	"sun.security.rsa.RSASignature$MD2withRSA");
	put("Alg.Alias.Signature.1.2.840.113549.1.1.2", "MD2withRSA");
	put("Alg.Alias.Signature.OID.1.2.840.113549.1.1.2",
	"MD2withRSA");

	put("Signature.MD5withRSA",
	"sun.security.rsa.RSASignature$MD5withRSA");
	put("Alg.Alias.Signature.1.2.840.113549.1.1.4", "MD5withRSA");
	put("Alg.Alias.Signature.OID.1.2.840.113549.1.1.4",
	"MD5withRSA");

	put("Signature.SHA1withRSA",
	"sun.security.rsa.RSASignature$SHA1withRSA");
	put("Alg.Alias.Signature.1.2.840.113549.1.1.5", "SHA1withRSA");
	put("Alg.Alias.Signature.OID.1.2.840.113549.1.1.5",
	"SHA1withRSA");
	put("Alg.Alias.Signature.1.3.14.3.2.29", "SHA1withRSA");
	put("Alg.Alias.Signature.OID.1.3.14.3.2.29", "SHA1withRSA");

	}
	put("Signature.MD5andSHA1withRSA",
	"sun.security.ssl.RSASignature");

	put("KeyManagerFactory.SunX509",
	"sun.security.ssl.KeyManagerFactoryImpl$SunX509");
	put("KeyManagerFactory.NewSunX509",
	"sun.security.ssl.KeyManagerFactoryImpl$X509");
	put("Alg.Alias.KeyManagerFactory.PKIX", "NewSunX509");

	put("TrustManagerFactory.SunX509",
	"sun.security.ssl.TrustManagerFactoryImpl$SimpleFactory");
	put("TrustManagerFactory.PKIX",
	"sun.security.ssl.TrustManagerFactoryImpl$PKIXFactory");
	put("Alg.Alias.TrustManagerFactory.SunPKIX", "PKIX");
	put("Alg.Alias.TrustManagerFactory.X509", "PKIX");
	put("Alg.Alias.TrustManagerFactory.X.509", "PKIX");

	put("SSLContext.TLSv1",
	"sun.security.ssl.SSLContextImpl$TLS10Context");
	put("SSLContext.TLSv1.1",
	"sun.security.ssl.SSLContextImpl$TLS11Context");
	put("SSLContext.TLSv1.2",
	"sun.security.ssl.SSLContextImpl$TLS12Context");
	put("SSLContext.TLSv1.3",
	"sun.security.ssl.SSLContextImpl$TLS13Context");
	put("SSLContext.TLS",
	"sun.security.ssl.SSLContextImpl$TLSContext");
	if (isfips == false) {
	put("Alg.Alias.SSLContext.SSL", "TLS");
	put("Alg.Alias.SSLContext.SSLv3", "TLSv1");
	}

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

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

	private void subclassCheck() {
	if (getClass() != com.sun.net.ssl.internal.ssl.Provider.class) {
	throw new AssertionError("Illegal subclass: " + getClass());
	}
	}

	@Override
	protected final void finalize() throws Throwable {
	// empty
	super.finalize();
	}

	}

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