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| 1 | +/* |
| 2 | + * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved. |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | + * |
| 5 | + * This code is free software; you can redistribute it and/or modify it |
| 6 | + * under the terms of the GNU General Public License version 2 only, as |
| 7 | + * published by the Free Software Foundation. Oracle designates this |
| 8 | + * particular file as subject to the "Classpath" exception as provided |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. |
| 10 | + * |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | + * accompanied this code). |
| 16 | + * |
| 17 | + * You should have received a copy of the GNU General Public License version |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | + * |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 22 | + * or visit www.oracle.com if you need additional information or have any |
| 23 | + * questions. |
| 24 | + */ |
| 25 | +package sun.security.validator; |
| 26 | + |
| 27 | +import java.security.cert.X509Certificate; |
| 28 | +import java.time.LocalDate; |
| 29 | +import java.time.Month; |
| 30 | +import java.time.ZoneOffset; |
| 31 | +import java.util.Arrays; |
| 32 | +import java.util.Collections; |
| 33 | +import java.util.Date; |
| 34 | +import java.util.HashSet; |
| 35 | +import java.util.Map; |
| 36 | +import java.util.Set; |
| 37 | + |
| 38 | +import sun.security.util.Debug; |
| 39 | +import sun.security.x509.X509CertImpl; |
| 40 | + |
| 41 | +/** |
| 42 | + * This class checks if Entrust issued TLS Server certificates should be |
| 43 | + * restricted. |
| 44 | + */ |
| 45 | +final class EntrustTLSPolicy { |
| 46 | + |
| 47 | + private static final Debug debug = Debug.getInstance("certpath"); |
| 48 | + |
| 49 | + // SHA-256 certificate fingerprints of distrusted roots |
| 50 | + private static final Set<String> FINGERPRINTS = |
| 51 | + Collections.unmodifiableSet(new HashSet<>(Arrays.asList( |
| 52 | + // cacerts alias: entrustevca |
| 53 | + // DN: CN=Entrust Root Certification Authority, |
| 54 | + // OU=(c) 2006 Entrust, Inc., |
| 55 | + // OU=www.entrust.net/CPS is incorporated by reference, |
| 56 | + // O=Entrust, Inc., C=US |
| 57 | + "73C176434F1BC6D5ADF45B0E76E727287C8DE57616C1E6E6141A2B2CBC7D8E4C", |
| 58 | + // cacerts alias: entrustrootcaec1 |
| 59 | + // DN: CN=Entrust Root Certification Authority - EC1, |
| 60 | + // OU=(c) 2012 Entrust, Inc. - for authorized use only, |
| 61 | + // OU=See www.entrust.net/legal-terms, O=Entrust, Inc., C=US |
| 62 | + "02ED0EB28C14DA45165C566791700D6451D7FB56F0B2AB1D3B8EB070E56EDFF5", |
| 63 | + // cacerts alias: entrustrootcag2 |
| 64 | + // DN: CN=Entrust Root Certification Authority - G2, |
| 65 | + // OU=(c) 2009 Entrust, Inc. - for authorized use only, |
| 66 | + // OU=See www.entrust.net/legal-terms, O=Entrust, Inc., C=US |
| 67 | + "43DF5774B03E7FEF5FE40D931A7BEDF1BB2E6B42738C4E6D3841103D3AA7F339", |
| 68 | + // cacerts alias: entrustrootcag4 |
| 69 | + // DN: CN=Entrust Root Certification Authority - G4 |
| 70 | + // OU=(c) 2015 Entrust, Inc. - for authorized use only, |
| 71 | + // OU=See www.entrust.net/legal-terms, O=Entrust, Inc., C=US, |
| 72 | + "DB3517D1F6732A2D5AB97C533EC70779EE3270A62FB4AC4238372460E6F01E88", |
| 73 | + // cacerts alias: entrust2048ca |
| 74 | + // DN: CN=Entrust.net Certification Authority (2048), |
| 75 | + // OU=(c) 1999 Entrust.net Limited, |
| 76 | + // OU=www.entrust.net/CPS_2048 incorp. by ref. (limits liab.), |
| 77 | + // O=Entrust.net |
| 78 | + "6DC47172E01CBCB0BF62580D895FE2B8AC9AD4F873801E0C10B9C837D21EB177", |
| 79 | + // cacerts alias: affirmtrustcommercialca |
| 80 | + // DN: CN=AffirmTrust Commercial, O=AffirmTrust, C=US |
| 81 | + "0376AB1D54C5F9803CE4B2E201A0EE7EEF7B57B636E8A93C9B8D4860C96F5FA7", |
| 82 | + // cacerts alias: affirmtrustnetworkingca |
| 83 | + // DN: CN=AffirmTrust Networking, O=AffirmTrust, C=US |
| 84 | + "0A81EC5A929777F145904AF38D5D509F66B5E2C58FCDB531058B0E17F3F0B41B", |
| 85 | + // cacerts alias: affirmtrustpremiumca |
| 86 | + // DN: CN=AffirmTrust Premium, O=AffirmTrust, C=US |
| 87 | + "70A73F7F376B60074248904534B11482D5BF0E698ECC498DF52577EBF2E93B9A", |
| 88 | + // cacerts alias: affirmtrustpremiumeccca |
| 89 | + // DN: CN=AffirmTrust Premium ECC, O=AffirmTrust, C=US |
| 90 | + "BD71FDF6DA97E4CF62D1647ADD2581B07D79ADF8397EB4ECBA9C5E8488821423" |
| 91 | + ))); |
| 92 | + |
| 93 | + // Any TLS Server certificate that is anchored by one of the Entrust |
| 94 | + // roots above and is issued after this date will be distrusted. |
| 95 | + private static final LocalDate OCTOBER_31_2024 = |
| 96 | + LocalDate.of(2024, Month.OCTOBER, 31); |
| 97 | + |
| 98 | + /** |
| 99 | + * This method assumes the eeCert is a TLS Server Cert and chains back to |
| 100 | + * the anchor. |
| 101 | + * |
| 102 | + * @param chain the end-entity's certificate chain. The end entity cert |
| 103 | + * is at index 0, the trust anchor at index n-1. |
| 104 | + * @throws ValidatorException if the certificate is distrusted |
| 105 | + */ |
| 106 | + static void checkDistrust(X509Certificate[] chain) |
| 107 | + throws ValidatorException { |
| 108 | + X509Certificate anchor = chain[chain.length-1]; |
| 109 | + String fp = fingerprint(anchor); |
| 110 | + if (fp == null) { |
| 111 | + throw new ValidatorException("Cannot generate fingerprint for " |
| 112 | + + "trust anchor of TLS server certificate"); |
| 113 | + } |
| 114 | + if (FINGERPRINTS.contains(fp)) { |
| 115 | + Date notBefore = chain[0].getNotBefore(); |
| 116 | + LocalDate ldNotBefore = notBefore.toInstant() |
| 117 | + .atZone(ZoneOffset.UTC).toLocalDate(); |
| 118 | + // reject if certificate is issued after October 31, 2024 |
| 119 | + checkNotBefore(ldNotBefore, OCTOBER_31_2024, anchor); |
| 120 | + } |
| 121 | + } |
| 122 | + |
| 123 | + private static String fingerprint(X509Certificate cert) { |
| 124 | + return X509CertImpl.getFingerprint("SHA-256", cert); |
| 125 | + } |
| 126 | + |
| 127 | + private static void checkNotBefore(LocalDate notBeforeDate, |
| 128 | + LocalDate distrustDate, X509Certificate anchor) |
| 129 | + throws ValidatorException { |
| 130 | + if (notBeforeDate.isAfter(distrustDate)) { |
| 131 | + throw new ValidatorException |
| 132 | + ("TLS Server certificate issued after " + distrustDate + |
| 133 | + " and anchored by a distrusted legacy Entrust root CA: " |
| 134 | + + anchor.getSubjectX500Principal(), |
| 135 | + ValidatorException.T_UNTRUSTED_CERT, anchor); |
| 136 | + } |
| 137 | + } |
| 138 | + |
| 139 | + private EntrustTLSPolicy() {} |
| 140 | +} |
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