1/* 2 * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26package sun.security.krb5.internal.crypto; 27 28import sun.security.krb5.EncryptedData; 29import sun.security.krb5.internal.crypto.dk.ArcFourCrypto; 30import sun.security.krb5.KrbCryptoException; 31import java.security.GeneralSecurityException; 32 33/** 34 * Class with static methods for doing RC4-HMAC operations. 35 * 36 * @author Seema Malkani 37 */ 38 39public class ArcFourHmac { 40 private static final ArcFourCrypto CRYPTO = new ArcFourCrypto(128); 41 42 private ArcFourHmac() { 43 } 44 45 public static byte[] stringToKey(char[] password) 46 throws GeneralSecurityException { 47 return CRYPTO.stringToKey(password); 48 } 49 50 // in bytes 51 public static int getChecksumLength() { 52 return CRYPTO.getChecksumLength(); 53 } 54 55 public static byte[] calculateChecksum(byte[] baseKey, int usage, 56 byte[] input, int start, int len) throws GeneralSecurityException { 57 return CRYPTO.calculateChecksum(baseKey, usage, input, start, len); 58 } 59 60 /* Encrypt Sequence Number */ 61 public static byte[] encryptSeq(byte[] baseKey, int usage, 62 byte[] checksum, byte[] plaintext, int start, int len) 63 throws GeneralSecurityException, KrbCryptoException { 64 return CRYPTO.encryptSeq(baseKey, usage, checksum, plaintext, start, len); 65 } 66 67 /* Decrypt Sequence Number */ 68 public static byte[] decryptSeq(byte[] baseKey, int usage, byte[] checksum, 69 byte[] ciphertext, int start, int len) 70 throws GeneralSecurityException, KrbCryptoException { 71 return CRYPTO.decryptSeq(baseKey, usage, checksum, ciphertext, start, len); 72 } 73 74 public static byte[] encrypt(byte[] baseKey, int usage, 75 byte[] ivec, byte[] plaintext, int start, int len) 76 throws GeneralSecurityException, KrbCryptoException { 77 return CRYPTO.encrypt(baseKey, usage, ivec, null /* new_ivec */, 78 plaintext, start, len); 79 } 80 81 /* Encrypt plaintext; do not add confounder, or checksum */ 82 public static byte[] encryptRaw(byte[] baseKey, int usage, 83 byte[] seqNum, byte[] plaintext, int start, int len) 84 throws GeneralSecurityException, KrbCryptoException { 85 return CRYPTO.encryptRaw(baseKey, usage, seqNum, plaintext, start, len); 86 } 87 88 public static byte[] decrypt(byte[] baseKey, int usage, byte[] ivec, 89 byte[] ciphertext, int start, int len) 90 throws GeneralSecurityException { 91 return CRYPTO.decrypt(baseKey, usage, ivec, ciphertext, start, len); 92 } 93 94 /* Decrypt ciphertext; do not remove confounder, or check checksum */ 95 public static byte[] decryptRaw(byte[] baseKey, int usage, byte[] ivec, 96 byte[] ciphertext, int start, int len, byte[] seqNum) 97 throws GeneralSecurityException { 98 return CRYPTO.decryptRaw(baseKey, usage, ivec, ciphertext, start, len, seqNum); 99 } 100}; 101