1 /* 2 * Copyright (c) 2014, 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 8036970 27 * @summary Ensure that Cipher object is still usable after SBE. 28 * @author Valerie Peng 29 */ 30 31 import java.security.*; 32 import javax.crypto.*; 33 import javax.crypto.spec.*; 34 import java.math.*; 35 36 import java.util.*; 37 38 public class TestGCMWithSBE extends UcryptoTest { 39 40 private static final byte[] PT = new byte[32]; 41 private static final byte[] ONE_BYTE = new byte[1]; 42 43 public static void main(String[] args) throws Exception { 44 main(new TestGCMWithSBE(), null); 45 } 46 47 public void doTest(Provider p) throws Exception { 48 Cipher c; 49 try { 50 c = Cipher.getInstance("AES/GCM/NoPadding", p); 51 } catch (NoSuchAlgorithmException nsae) { 52 System.out.println("Skipping Test due to No GCM support"); 53 return; 54 } 55 56 SecretKey key = new SecretKeySpec(new byte[16], "AES"); 57 c.init(Cipher.ENCRYPT_MODE, key); 58 59 // test SBE with update calls 60 byte[] ct1 = null; 61 try { 62 c.update(PT, 0, PT.length, ONE_BYTE); 63 } catch (ShortBufferException sbe) { 64 // retry should work 65 ct1 = c.update(PT, 0, PT.length); 66 } 67 68 byte[] ct2PlusTag = null; 69 // test SBE with doFinal calls 70 try { 71 c.doFinal(ONE_BYTE, 0); 72 } catch (ShortBufferException sbe) { 73 // retry should work 74 ct2PlusTag = c.doFinal(); 75 } 76 77 // Validate the retrieved parameters against the IV and tag length. 78 AlgorithmParameters params = c.getParameters(); 79 if (params == null) { 80 throw new Exception("getParameters() should not return null"); 81 } 82 GCMParameterSpec spec = params.getParameterSpec(GCMParameterSpec.class); 83 if (spec.getTLen() != (ct1.length + ct2PlusTag.length - PT.length)*8) { 84 throw new Exception("Parameters contains incorrect TLen value"); 85 } 86 if (!Arrays.equals(spec.getIV(), c.getIV())) { 87 throw new Exception("Parameters contains incorrect IV value"); 88 } 89 90 // Should be ok to use the same key+iv for decryption 91 c.init(Cipher.DECRYPT_MODE, key, params); 92 byte[] pt1 = c.update(ct1); 93 if (pt1 != null && pt1.length != 0) { 94 throw new Exception("Recovered text should not be returned " 95 + "to caller before tag verification"); 96 } 97 98 byte[] pt2 = null; 99 try { 100 c.doFinal(ct2PlusTag, 0, ct2PlusTag.length, ONE_BYTE); 101 } catch (ShortBufferException sbe) { 102 // retry should work 103 pt2 = c.doFinal(ct2PlusTag); 104 } 105 if (!Arrays.equals(pt2, PT)) { 106 throw new Exception("decryption result mismatch"); 107 } 108 109 System.out.println("Test Passed!"); 110 } 111 } 112