From 4c0d0c287d5aaff00b801bb76a0a926367339677 Mon Sep 17 00:00:00 2001
From: mbalao <unknown>
Date: Mon, 26 Aug 2019 13:57:51 -0400
Subject: 8227758: More valid PKIX processing Reviewed-by: andrew

---
 .../sun/security/validator/PKIXValidator.java      | 44 +++++++++++-----------
 1 file changed, 23 insertions(+), 21 deletions(-)

(limited to 'src/share/classes/sun/security')

diff --git a/src/share/classes/sun/security/validator/PKIXValidator.java b/src/share/classes/sun/security/validator/PKIXValidator.java
index 9be502626e..f46017dd81 100644
--- a/src/share/classes/sun/security/validator/PKIXValidator.java
+++ b/src/share/classes/sun/security/validator/PKIXValidator.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2002, 2017, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2002, 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
@@ -209,6 +209,7 @@ public final class PKIXValidator extends Validator {
                 ("null or zero-length certificate chain");
         }
 
+
         // Use PKIXExtendedParameters for timestamp and variant additions
         PKIXBuilderParameters pkixParameters = null;
         try {
@@ -234,29 +235,30 @@ public final class PKIXValidator extends Validator {
             for (int i = 0; i < chain.length; i++) {
                 X509Certificate cert = chain[i];
                 X500Principal dn = cert.getSubjectX500Principal();
-                if (i != 0 &&
-                    !dn.equals(prevIssuer)) {
-                    // chain is not ordered correctly, call builder instead
-                    return doBuild(chain, otherCerts, pkixParameters);
-                }
 
-                // Check if chain[i] is already trusted. It may be inside
-                // trustedCerts, or has the same dn and public key as a cert
-                // inside trustedCerts. The latter happens when a CA has
-                // updated its cert with a stronger signature algorithm in JRE
-                // but the weak one is still in circulation.
-
-                if (trustedCerts.contains(cert) ||          // trusted cert
-                        (trustedSubjects.containsKey(dn) && // replacing ...
-                         trustedSubjects.get(dn).contains(  // ... weak cert
-                            cert.getPublicKey()))) {
-                    if (i == 0) {
+                if (i == 0) {
+                    if (trustedCerts.contains(cert)) {
                         return new X509Certificate[] {chain[0]};
                     }
-                    // Remove and call validator on partial chain [0 .. i-1]
-                    X509Certificate[] newChain = new X509Certificate[i];
-                    System.arraycopy(chain, 0, newChain, 0, i);
-                    return doValidate(newChain, pkixParameters);
+                } else {
+                    if (!dn.equals(prevIssuer)) {
+                        // chain is not ordered correctly, call builder instead
+                        return doBuild(chain, otherCerts, pkixParameters);
+                    }
+                    // Check if chain[i] is already trusted. It may be inside
+                    // trustedCerts, or has the same dn and public key as a cert
+                    // inside trustedCerts. The latter happens when a CA has
+                    // updated its cert with a stronger signature algorithm in JRE
+                    // but the weak one is still in circulation.
+                    if (trustedCerts.contains(cert) ||          // trusted cert
+                            (trustedSubjects.containsKey(dn) && // replacing ...
+                             trustedSubjects.get(dn).contains(  // ... weak cert
+                                cert.getPublicKey()))) {
+                        // Remove and call validator on partial chain [0 .. i-1]
+                        X509Certificate[] newChain = new X509Certificate[i];
+                        System.arraycopy(chain, 0, newChain, 0, i);
+                        return doValidate(newChain, pkixParameters);
+                    }
                 }
                 prevIssuer = cert.getIssuerX500Principal();
             }
-- 
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