| /* |
| * Copyright (c) 2004, 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.krb5.internal.crypto; |
| |
| import sun.security.krb5.KrbCryptoException; |
| import sun.security.krb5.internal.*; |
| import java.security.GeneralSecurityException; |
| import sun.security.krb5.EncryptedData; |
| import sun.security.krb5.Checksum; |
| |
| /* |
| * This class encapsulates the encryption type for AES256 |
| * |
| * @author Seema Malkani |
| */ |
| |
| public final class Aes256CtsHmacSha1EType extends EType { |
| |
| public int eType() { |
| return EncryptedData.ETYPE_AES256_CTS_HMAC_SHA1_96; |
| } |
| |
| public int minimumPadSize() { |
| return 0; |
| } |
| |
| public int confounderSize() { |
| return blockSize(); |
| } |
| |
| public int checksumType() { |
| return Checksum.CKSUMTYPE_HMAC_SHA1_96_AES256; |
| } |
| |
| public int checksumSize() { |
| return Aes256.getChecksumLength(); |
| } |
| |
| public int blockSize() { |
| return 16; |
| } |
| |
| public int keyType() { |
| return Krb5.KEYTYPE_AES; |
| } |
| |
| public int keySize() { |
| return 32; // bytes |
| } |
| |
| public byte[] encrypt(byte[] data, byte[] key, int usage) |
| throws KrbCryptoException { |
| byte[] ivec = new byte[blockSize()]; |
| return encrypt(data, key, ivec, usage); |
| } |
| |
| public byte[] encrypt(byte[] data, byte[] key, byte[] ivec, int usage) |
| throws KrbCryptoException { |
| try { |
| return Aes256.encrypt(key, usage, ivec, data, 0, data.length); |
| } catch (GeneralSecurityException e) { |
| KrbCryptoException ke = new KrbCryptoException(e.getMessage()); |
| ke.initCause(e); |
| throw ke; |
| } |
| } |
| |
| public byte[] decrypt(byte[] cipher, byte[] key, int usage) |
| throws KrbApErrException, KrbCryptoException { |
| byte[] ivec = new byte[blockSize()]; |
| return decrypt(cipher, key, ivec, usage); |
| } |
| |
| public byte[] decrypt(byte[] cipher, byte[] key, byte[] ivec, int usage) |
| throws KrbApErrException, KrbCryptoException { |
| try { |
| return Aes256.decrypt(key, usage, ivec, cipher, 0, cipher.length); |
| } catch (GeneralSecurityException e) { |
| KrbCryptoException ke = new KrbCryptoException(e.getMessage()); |
| ke.initCause(e); |
| throw ke; |
| } |
| } |
| |
| // Override default, because our decrypted data does not return confounder |
| // Should eventually get rid of EType.decryptedData and |
| // EncryptedData.decryptedData altogether |
| public byte[] decryptedData(byte[] data) { |
| return data; |
| } |
| } |