author | weijun |
Mon, 22 Jan 2018 12:00:41 +0800 | |
changeset 48651 | 67abfee27e69 |
permissions | -rw-r--r-- |
48651
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/* |
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* Copyright (c) 2017, 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.krb5.internal.crypto; |
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import sun.security.krb5.Checksum; |
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import sun.security.krb5.KrbCryptoException; |
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import sun.security.krb5.internal.*; |
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import java.security.GeneralSecurityException; |
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/* |
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* This class encapsulates the checksum type for aes256-cts-sha384 |
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*/ |
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public class HmacSha2Aes256CksumType extends CksumType { |
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public HmacSha2Aes256CksumType() { |
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} |
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public int confounderSize() { |
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return 16; |
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} |
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public int cksumType() { |
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return Checksum.CKSUMTYPE_HMAC_SHA384_192_AES256; |
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} |
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public boolean isSafe() { |
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return true; |
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} |
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public int cksumSize() { |
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return 24; // bytes |
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} |
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public int keyType() { |
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return Krb5.KEYTYPE_AES; |
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} |
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public int keySize() { |
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return 32; // bytes |
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} |
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public byte[] calculateChecksum(byte[] data, int size) { |
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return null; |
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} |
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/** |
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* Calculates keyed checksum. |
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* @param data the data used to generate the checksum. |
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* @param size length of the data. |
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* @param key the key used to encrypt the checksum. |
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* @return keyed checksum. |
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*/ |
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public byte[] calculateKeyedChecksum(byte[] data, int size, byte[] key, |
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int usage) throws KrbCryptoException { |
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try { |
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return Aes256Sha2.calculateChecksum(key, usage, data, 0, size); |
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} catch (GeneralSecurityException e) { |
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KrbCryptoException ke = new KrbCryptoException(e.getMessage()); |
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ke.initCause(e); |
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throw ke; |
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} |
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} |
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/** |
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* Verifies keyed checksum. |
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* @param data the data. |
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* @param size the length of data. |
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* @param key the key used to encrypt the checksum. |
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* @param checksum the checksum. |
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* @return true if verification is successful. |
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*/ |
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public boolean verifyKeyedChecksum(byte[] data, int size, |
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byte[] key, byte[] checksum, int usage) throws KrbCryptoException { |
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|
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try { |
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byte[] newCksum = Aes256Sha2.calculateChecksum(key, usage, data, |
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0, size); |
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return isChecksumEqual(checksum, newCksum); |
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} catch (GeneralSecurityException e) { |
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KrbCryptoException ke = new KrbCryptoException(e.getMessage()); |
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ke.initCause(e); |
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throw ke; |
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} |
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} |
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} |