0N/A/*
2362N/A * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
2362N/A * published by the Free Software Foundation. Oracle designates this
0N/A * particular file as subject to the "Classpath" exception as provided
2362N/A * by Oracle in the LICENSE file that accompanied this code.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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0N/A */
0N/A
0N/Apackage sun.security.krb5.internal.crypto;
0N/A
0N/Aimport sun.security.krb5.Checksum;
0N/Aimport sun.security.krb5.KrbCryptoException;
0N/Aimport sun.security.krb5.internal.*;
0N/Aimport javax.crypto.spec.DESKeySpec;
0N/Aimport java.security.InvalidKeyException;
0N/Aimport java.security.GeneralSecurityException;
0N/A
0N/A/**
0N/A * This class encapsulates the checksum type for HMAC RC4
0N/A *
0N/A * @author Seema Malkani
0N/A */
0N/A
0N/Apublic class HmacMd5ArcFourCksumType extends CksumType {
0N/A
0N/A public HmacMd5ArcFourCksumType() {
0N/A }
0N/A
0N/A public int confounderSize() {
0N/A return 8;
0N/A }
0N/A
0N/A public int cksumType() {
0N/A return Checksum.CKSUMTYPE_HMAC_MD5_ARCFOUR;
0N/A }
0N/A
0N/A public boolean isSafe() {
0N/A return true;
0N/A }
0N/A
0N/A public int cksumSize() {
0N/A return 16; // bytes
0N/A }
0N/A
0N/A public int keyType() {
0N/A return Krb5.KEYTYPE_ARCFOUR_HMAC;
0N/A }
0N/A
0N/A public int keySize() {
0N/A return 16; // bytes
0N/A }
0N/A
0N/A public byte[] calculateChecksum(byte[] data, int size) {
0N/A return null;
0N/A }
0N/A
0N/A /**
0N/A * Calculates keyed checksum.
0N/A * @param data the data used to generate the checksum.
0N/A * @param size length of the data.
0N/A * @param key the key used to encrypt the checksum.
0N/A * @return keyed checksum.
0N/A */
0N/A public byte[] calculateKeyedChecksum(byte[] data, int size, byte[] key,
0N/A int usage) throws KrbCryptoException {
0N/A
0N/A try {
0N/A return ArcFourHmac.calculateChecksum(key, usage, data, 0, size);
0N/A } catch (GeneralSecurityException e) {
0N/A KrbCryptoException ke = new KrbCryptoException(e.getMessage());
0N/A ke.initCause(e);
0N/A throw ke;
0N/A }
0N/A }
0N/A
0N/A /**
0N/A * Verifies keyed checksum.
0N/A * @param data the data.
0N/A * @param size the length of data.
0N/A * @param key the key used to encrypt the checksum.
0N/A * @param checksum
0N/A * @return true if verification is successful.
0N/A */
0N/A public boolean verifyKeyedChecksum(byte[] data, int size,
0N/A byte[] key, byte[] checksum, int usage) throws KrbCryptoException {
0N/A
0N/A try {
0N/A byte[] newCksum = ArcFourHmac.calculateChecksum(key, usage,
0N/A data, 0, size);
0N/A
0N/A return isChecksumEqual(checksum, newCksum);
0N/A } catch (GeneralSecurityException e) {
0N/A KrbCryptoException ke = new KrbCryptoException(e.getMessage());
0N/A ke.initCause(e);
0N/A throw ke;
0N/A }
0N/A }
0N/A}