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	/*
	* Copyright (c) 2018, 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
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/
	package sun.security.validator;

	import java.security.cert.X509Certificate;
	import java.time.LocalDate;
	import java.time.Month;
	import java.time.ZoneOffset;
	import java.util.Arrays;
	import java.util.Date;
	import java.util.HashMap;
	import java.util.HashSet;
	import java.util.Map;
	import java.util.Set;

	import sun.security.x509.X509CertImpl;

	/**
	* This class checks if Symantec issued TLS Server certificates should be
	* restricted.
	*/
	final class SymantecTLSPolicy {
	private static final LocalDate DECEMBER_31_2019 =
	LocalDate.of(2019, Month.DECEMBER, 31);
	// SHA-256 certificate fingerprints of subCAs with later distrust dates
	private static final Map<String, LocalDate> EXEMPT_SUBCAS = new HashMap();
	static {
	// Subject DN: C=US, O=Apple Inc., OU=Certification Authority,
	// CN=Apple IST CA 2 - G1
	// Issuer DN: CN=GeoTrust Global CA, O=GeoTrust Inc., C=US
	EXEMPT_SUBCAS.put("AC2B922ECFD5E01711772FEA8ED372DE9D1E2245FCE3F57A9CDBEC77296A424B",
	DECEMBER_31_2019);


	// Subject DN: C=US, O=Apple Inc., OU=Certification Authority,
	// CN=Apple IST CA 8 - G1
	// Issuer DN: CN=GeoTrust Primary Certification Authority - G2,
	// OU=(c) 2007 GeoTrust Inc. - For authorized use only,
	// O=GeoTrust Inc., C=US
	EXEMPT_SUBCAS.put("A4FE7C7F15155F3F0AEF7AAA83CF6E06DEB97CA3F909DF920AC1490882D488ED",
	DECEMBER_31_2019);
	}

	// SHA-256 certificate fingerprints of distrusted roots
	private static final Set<String> FINGERPRINTS = new HashSet<>(Arrays.asList(
	// cacerts alias: geotrustglobalca
	// DN: CN=GeoTrust Global CA, O=GeoTrust Inc., C=US
	"FF856A2D251DCD88D36656F450126798CFABAADE40799C722DE4D2B5DB36A73A",
	// cacerts alias: geotrustprimaryca
	// DN: CN=GeoTrust Primary Certification Authority,
	// O=GeoTrust Inc., C=US
	"37D51006C512EAAB626421F1EC8C92013FC5F82AE98EE533EB4619B8DEB4D06C",
	// cacerts alias: geotrustprimarycag2
	// DN: CN=GeoTrust Primary Certification Authority - G2,
	// OU=(c) 2007 GeoTrust Inc. - For authorized use only,
	// O=GeoTrust Inc., C=US
	"5EDB7AC43B82A06A8761E8D7BE4979EBF2611F7DD79BF91C1C6B566A219ED766",
	// cacerts alias: geotrustprimarycag3
	// DN: CN=GeoTrust Primary Certification Authority - G3,
	// OU=(c) 2008 GeoTrust Inc. - For authorized use only,
	// O=GeoTrust Inc., C=US
	"B478B812250DF878635C2AA7EC7D155EAA625EE82916E2CD294361886CD1FBD4",
	// cacerts alias: geotrustuniversalca
	// DN: CN=GeoTrust Universal CA, O=GeoTrust Inc., C=US
	"A0459B9F63B22559F5FA5D4C6DB3F9F72FF19342033578F073BF1D1B46CBB912",
	// cacerts alias: thawteprimaryrootca
	// DN: CN=thawte Primary Root CA,
	// OU="(c) 2006 thawte, Inc. - For authorized use only",
	// OU=Certification Services Division, O="thawte, Inc.", C=US
	"8D722F81A9C113C0791DF136A2966DB26C950A971DB46B4199F4EA54B78BFB9F",
	// cacerts alias: thawteprimaryrootcag2
	// DN: CN=thawte Primary Root CA - G2,
	// OU="(c) 2007 thawte, Inc. - For authorized use only",
	// O="thawte, Inc.", C=US
	"A4310D50AF18A6447190372A86AFAF8B951FFB431D837F1E5688B45971ED1557",
	// cacerts alias: thawteprimaryrootcag3
	// DN: CN=thawte Primary Root CA - G3,
	// OU="(c) 2008 thawte, Inc. - For authorized use only",
	// OU=Certification Services Division, O="thawte, Inc.", C=US
	"4B03F45807AD70F21BFC2CAE71C9FDE4604C064CF5FFB686BAE5DBAAD7FDD34C",
	// cacerts alias: thawtepremiumserverca
	// DN: EMAILADDRESS=premium-server@thawte.com,
	// CN=Thawte Premium Server CA, OU=Certification Services Division,
	// O=Thawte Consulting cc, L=Cape Town, ST=Western Cape, C=ZA
	"3F9F27D583204B9E09C8A3D2066C4B57D3A2479C3693650880505698105DBCE9",
	// cacerts alias: verisignclass2g2ca
	// DN: OU=VeriSign Trust Network,
	// OU="(c) 1998 VeriSign, Inc. - For authorized use only",
	// OU=Class 2 Public Primary Certification Authority - G2,
	// O="VeriSign, Inc.", C=US
	"3A43E220FE7F3EA9653D1E21742EAC2B75C20FD8980305BC502CAF8C2D9B41A1",
	// cacerts alias: verisignclass3ca
	// DN: OU=Class 3 Public Primary Certification Authority,
	// O="VeriSign, Inc.", C=US
	"A4B6B3996FC2F306B3FD8681BD63413D8C5009CC4FA329C2CCF0E2FA1B140305",
	// cacerts alias: verisignclass3g2ca
	// DN: OU=VeriSign Trust Network,
	// OU="(c) 1998 VeriSign, Inc. - For authorized use only",
	// OU=Class 3 Public Primary Certification Authority - G2,
	// O="VeriSign, Inc.", C=US
	"83CE3C1229688A593D485F81973C0F9195431EDA37CC5E36430E79C7A888638B",
	// cacerts alias: verisignclass3g3ca
	// DN: CN=VeriSign Class 3 Public Primary Certification Authority - G3,
	// OU="(c) 1999 VeriSign, Inc. - For authorized use only",
	// OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US
	"EB04CF5EB1F39AFA762F2BB120F296CBA520C1B97DB1589565B81CB9A17B7244",
	// cacerts alias: verisignclass3g4ca
	// DN: CN=VeriSign Class 3 Public Primary Certification Authority - G4,
	// OU="(c) 2007 VeriSign, Inc. - For authorized use only",
	// OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US
	"69DDD7EA90BB57C93E135DC85EA6FCD5480B603239BDC454FC758B2A26CF7F79",
	// cacerts alias: verisignclass3g5ca
	// DN: CN=VeriSign Class 3 Public Primary Certification Authority - G5,
	// OU="(c) 2006 VeriSign, Inc. - For authorized use only",
	// OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US
	"9ACFAB7E43C8D880D06B262A94DEEEE4B4659989C3D0CAF19BAF6405E41AB7DF",
	// cacerts alias: verisignuniversalrootca
	// DN: CN=VeriSign Universal Root Certification Authority,
	// OU="(c) 2008 VeriSign, Inc. - For authorized use only",
	// OU=VeriSign Trust Network, O="VeriSign, Inc.", C=US
	"2399561127A57125DE8CEFEA610DDF2FA078B5C8067F4E828290BFB860E84B3C"
	));

	// Any TLS Server certificate that is anchored by one of the Symantec
	// roots above and is issued after this date will be distrusted.
	private static final LocalDate APRIL_16_2019 =
	LocalDate.of(2019, Month.APRIL, 16);

	/**
	* This method assumes the eeCert is a TLS Server Cert and chains back to
	* the anchor.
	*
	* @param chain the end-entity's certificate chain. The end entity cert
	* is at index 0, the trust anchor at index n-1.
	* @throws ValidatorException if the certificate is distrusted
	*/
	static void checkDistrust(X509Certificate[] chain)
	throws ValidatorException {
	X509Certificate anchor = chain[chain.length-1];
	if (FINGERPRINTS.contains(fingerprint(anchor))) {
	Date notBefore = chain[0].getNotBefore();
	LocalDate ldNotBefore = notBefore.toInstant().atZone(ZoneOffset.UTC).toLocalDate();

	// check if chain goes through one of the subCAs
	if (chain.length > 2) {
	X509Certificate subCA = chain[chain.length - 2];
	LocalDate distrustDate = EXEMPT_SUBCAS.get(fingerprint(subCA));
	if (distrustDate != null) {
	// reject if certificate is issued after specified date
	checkNotBefore(ldNotBefore, distrustDate, anchor);
	return; // success
	}
	}
	// reject if certificate is issued after April 16, 2019
	checkNotBefore(ldNotBefore, APRIL_16_2019, anchor);
	}
	}

	private static String fingerprint(X509Certificate cert) {
	return (cert instanceof X509CertImpl)
	? ((X509CertImpl)cert).getFingerprint("SHA-256")
	: X509CertImpl.getFingerprint("SHA-256", cert);
	}

	private static void checkNotBefore(LocalDate notBeforeDate,
	LocalDate distrustDate, X509Certificate anchor)
	throws ValidatorException {
	if (notBeforeDate.isAfter(distrustDate)) {
	throw new ValidatorException
	("TLS Server certificate issued after " + distrustDate +
	" and anchored by a distrusted legacy Symantec root CA: "
	+ anchor.getSubjectX500Principal(),
	ValidatorException.T_UNTRUSTED_CERT, anchor);
	}
	}
	private SymantecTLSPolicy() {}
	}

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