J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2005 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package sun.security.krb5.internal.crypto; |
| 27 | |
| 28 | import sun.security.krb5.EncryptedData; |
| 29 | import sun.security.krb5.internal.crypto.dk.ArcFourCrypto; |
| 30 | import sun.security.krb5.KrbCryptoException; |
| 31 | import java.security.GeneralSecurityException; |
| 32 | |
| 33 | /** |
| 34 | * Class with static methods for doing RC4-HMAC operations. |
| 35 | * |
| 36 | * @author Seema Malkani |
| 37 | */ |
| 38 | |
| 39 | public 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 | }; |