1 /* 2 * Copyright (c) 2003, 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 /** 25 * @test 26 * @bug 4856966 27 * @summary Test the MessageDigest.update(ByteBuffer) method 28 * @author Andreas Sterbenz 29 * @library .. 30 * @key randomness 31 */ 32 33 import java.util.*; 34 import java.nio.*; 35 36 import java.security.*; 37 38 public class ByteBuffers extends PKCS11Test { 39 40 public static void main(String[] args) throws Exception { 41 main(new ByteBuffers()); 42 } 43 44 public void main(Provider p) throws Exception { 45 if (p.getService("MessageDigest", "MD5") == null) { 46 System.out.println("Provider does not support MD5, skipping"); 47 return; 48 } 49 50 Random random = new Random(); 51 int n = 10 * 1024; 52 byte[] t = new byte[n]; 53 random.nextBytes(t); 54 55 MessageDigest md = MessageDigest.getInstance("MD5", p); 56 byte[] d1 = md.digest(t); 57 58 // test 1: ByteBuffer with an accessible backing array 59 ByteBuffer b1 = ByteBuffer.allocate(n + 256); 60 b1.position(random.nextInt(256)); 61 b1.limit(b1.position() + n); 62 ByteBuffer b2 = b1.slice(); 63 b2.put(t); 64 b2.clear(); 65 byte[] d2 = digest(md, b2, random); 66 if (Arrays.equals(d1, d2) == false) { 67 throw new Exception("Test 1 failed"); 68 } 69 70 // test 2: direct ByteBuffer 71 ByteBuffer b3 = ByteBuffer.allocateDirect(t.length); 72 b3.put(t); 73 b3.clear(); 74 byte[] d3 = digest(md, b3, random); 75 if (Arrays.equals(d1, d2) == false) { 76 throw new Exception("Test 2 failed"); 77 } 78 79 // test 3: ByteBuffer without an accessible backing array 80 b2.clear(); 81 ByteBuffer b4 = b2.asReadOnlyBuffer(); 82 byte[] d4 = digest(md, b4, random); 83 if (Arrays.equals(d1, d2) == false) { 84 throw new Exception("Test 3 failed"); 85 } 86 System.out.println("All tests passed"); 87 } 88 89 private static byte[] digest(MessageDigest md, ByteBuffer b, Random random) throws Exception { 90 int lim = b.limit(); 91 b.limit(random.nextInt(lim)); 92 md.update(b); 93 if (b.hasRemaining()) { 94 throw new Exception("Buffer not consumed"); 95 } 96 b.limit(lim); 97 md.update(b); 98 if (b.hasRemaining()) { 99 throw new Exception("Buffer not consumed"); 100 } 101 return md.digest(); 102 } 103 }