author | ascarpino |
Wed, 08 Feb 2017 12:08:28 -0800 | |
changeset 43701 | fe8c324ba97c |
parent 32649 | 2ee9017c7597 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2002, 2007, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package sun.security.ssl; |
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import java.security.*; |
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/** |
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* The "KeyManager" for ephemeral RSA keys. Ephemeral DH and ECDH keys |
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* are handled by the DHCrypt and ECDHCrypt classes, respectively. |
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* |
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* @author Andreas Sterbenz |
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*/ |
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final class EphemeralKeyManager { |
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// indices for the keys array below |
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8136583: Core libraries should use blessed modifier order
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private static final int INDEX_RSA512 = 0; |
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private static final int INDEX_RSA1024 = 1; |
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/* |
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* Current cached RSA KeyPairs. Elements are never null. |
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e576535359cc
8067377: My hobby: caning, then then canning, the the can-can
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* Indexed via the constants above. |
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*/ |
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private final EphemeralKeyPair[] keys = new EphemeralKeyPair[] { |
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new EphemeralKeyPair(null), |
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new EphemeralKeyPair(null), |
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}; |
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EphemeralKeyManager() { |
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// empty |
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} |
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/* |
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* Get a temporary RSA KeyPair. |
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*/ |
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KeyPair getRSAKeyPair(boolean export, SecureRandom random) { |
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int length, index; |
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if (export) { |
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length = 512; |
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index = INDEX_RSA512; |
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} else { |
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length = 1024; |
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index = INDEX_RSA1024; |
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} |
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synchronized (keys) { |
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KeyPair kp = keys[index].getKeyPair(); |
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if (kp == null) { |
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try { |
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KeyPairGenerator kgen = JsseJce.getKeyPairGenerator("RSA"); |
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kgen.initialize(length, random); |
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keys[index] = new EphemeralKeyPair(kgen.genKeyPair()); |
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kp = keys[index].getKeyPair(); |
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} catch (Exception e) { |
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// ignore |
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} |
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} |
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return kp; |
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} |
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} |
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/** |
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* Inner class to handle storage of ephemeral KeyPairs. |
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*/ |
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private static class EphemeralKeyPair { |
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// maximum number of times a KeyPair is used |
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private static final int MAX_USE = 200; |
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// maximum time interval in which the keypair is used (1 hour in ms) |
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private static final long USE_INTERVAL = 3600*1000; |
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private KeyPair keyPair; |
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private int uses; |
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private long expirationTime; |
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private EphemeralKeyPair(KeyPair keyPair) { |
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this.keyPair = keyPair; |
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expirationTime = System.currentTimeMillis() + USE_INTERVAL; |
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} |
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/* |
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* Check if the KeyPair can still be used. |
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*/ |
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private boolean isValid() { |
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return (keyPair != null) && (uses < MAX_USE) |
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&& (System.currentTimeMillis() < expirationTime); |
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} |
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/* |
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* Return the KeyPair or null if it is invalid. |
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*/ |
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private KeyPair getKeyPair() { |
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if (isValid() == false) { |
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keyPair = null; |
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return null; |
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} |
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uses++; |
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return keyPair; |
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} |
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} |
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} |