1 /* 2 * Copyright (c) 2018, 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. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.security.*; 25 26 class DigestBase extends MessageDigestSpi { 27 28 private MessageDigest digest = null; 29 30 public DigestBase(String alg, String provider) throws Exception { 31 digest = MessageDigest.getInstance(alg, provider); 32 } 33 34 @Override 35 protected void engineUpdate(byte input) { 36 digest.update(input); 37 } 38 39 @Override 40 protected void engineUpdate(byte[] input, int offset, int len) { 41 digest.update(input, offset, len); 42 } 43 44 @Override 45 protected byte[] engineDigest() { 46 return digest.digest(); 47 } 48 49 @Override 50 protected void engineReset() { 51 digest.reset(); 52 } 53 54 @Override 55 protected int engineGetDigestLength() { 56 return digest.getDigestLength(); 57 } 58 59 public static final class MD5 extends DigestBase { 60 public MD5() throws Exception { 61 super("MD5", "SUN"); 62 } 63 } 64 65 public static final class SHA extends DigestBase { 66 public SHA() throws Exception { 67 super("SHA", "SUN"); 68 } 69 } 70 71 public static final class SHA256 extends DigestBase { 72 public SHA256() throws Exception { 73 super("SHA-256", "SUN"); 74 } 75 } 76 }