| /* |
| * Copyright (c) 2012, 2013, 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.util; |
| |
| import java.io.*; |
| import java.security.AccessController; |
| import java.security.MessageDigest; |
| import java.security.NoSuchAlgorithmException; |
| import java.security.PrivilegedAction; |
| import java.security.cert.X509Certificate; |
| import java.security.cert.CertificateException; |
| import java.util.*; |
| import sun.security.x509.X509CertImpl; |
| |
| /** |
| * A utility class to check if a certificate is untrusted. This is an internal |
| * mechanism that explicitly marks a certificate as untrusted, normally in the |
| * case that a certificate is known to be used for malicious reasons. |
| * |
| * <b>Attention</b>: This check is NOT meant to replace the standard PKI-defined |
| * validation check, neither is it used as an alternative to CRL. |
| */ |
| public final class UntrustedCertificates { |
| |
| private static final Debug debug = Debug.getInstance("certpath"); |
| private static final String ALGORITHM_KEY = "Algorithm"; |
| |
| private static final Properties props = new Properties(); |
| private static final String algorithm; |
| |
| static { |
| AccessController.doPrivileged(new PrivilegedAction<Void>() { |
| @Override |
| public Void run() { |
| File f = new File(System.getProperty("java.home"), |
| "lib/security/blacklisted.certs"); |
| try (FileInputStream fin = new FileInputStream(f)) { |
| props.load(fin); |
| // It's said that the fingerprint could contain colons |
| for (Map.Entry<Object,Object> e: props.entrySet()) { |
| e.setValue(stripColons(e.getValue())); |
| } |
| } catch (IOException fnfe) { |
| if (debug != null) { |
| debug.println("Error parsing blacklisted.certs"); |
| } |
| } |
| return null; |
| } |
| }); |
| algorithm = props.getProperty(ALGORITHM_KEY); |
| } |
| |
| private static String stripColons(Object input) { |
| String s = (String)input; |
| char[] letters = s.toCharArray(); |
| int pos = 0; |
| for (int i = 0; i < letters.length; i++) { |
| if (letters[i] != ':') { |
| if (i != pos) { |
| letters[pos] = letters[i]; |
| } |
| pos++; |
| } |
| } |
| if (pos == letters.length) return s; |
| else return new String(letters, 0, pos); |
| } |
| /** |
| * Checks if a certificate is untrusted. |
| * |
| * @param cert the certificate to check |
| * @return true if the certificate is untrusted. |
| */ |
| public static boolean isUntrusted(X509Certificate cert) { |
| if (algorithm == null) { |
| return false; |
| } |
| String key; |
| if (cert instanceof X509CertImpl) { |
| key = ((X509CertImpl)cert).getFingerprint(algorithm); |
| } else { |
| try { |
| key = new X509CertImpl(cert.getEncoded()).getFingerprint(algorithm); |
| } catch (CertificateException cee) { |
| return false; |
| } |
| } |
| return props.containsKey(key); |
| } |
| |
| private UntrustedCertificates() {} |
| } |