| /* |
| * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| * @test |
| * @bug 8014374 |
| * @summary Ensure that same key+iv can't be repeatedly used for encryption. |
| * @author Valerie Peng |
| */ |
| |
| import java.security.*; |
| import javax.crypto.*; |
| import javax.crypto.spec.*; |
| import java.math.*; |
| import com.sun.crypto.provider.*; |
| |
| import java.util.*; |
| |
| public class TestGCMKeyAndIvCheck extends UcryptoTest { |
| |
| private static final byte[] AAD = new byte[5]; |
| private static final byte[] PT = new byte[33]; |
| |
| private static void checkISE(Cipher c) throws Exception { |
| // Subsequent encryptions should fail |
| try { |
| c.updateAAD(AAD); |
| throw new Exception("Should throw ISE for updateAAD()"); |
| } catch (IllegalStateException ise) { |
| // expected |
| } |
| |
| try { |
| c.update(PT); |
| throw new Exception("Should throw ISE for update()"); |
| } catch (IllegalStateException ise) { |
| // expected |
| } |
| try { |
| c.doFinal(PT); |
| throw new Exception("Should throw ISE for doFinal()"); |
| } catch (IllegalStateException ise) { |
| // expected |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| main(new TestGCMKeyAndIvCheck(), null); |
| } |
| |
| public void doTest(Provider p) throws Exception { |
| Cipher c; |
| try { |
| c = Cipher.getInstance("AES/GCM/NoPadding", p); |
| } catch (NoSuchAlgorithmException nsae) { |
| System.out.println("Skipping Test due to No GCM support"); |
| return; |
| } |
| |
| SecretKey key = new SecretKeySpec(new byte[16], "AES"); |
| // First try parameter-less init. |
| c.init(Cipher.ENCRYPT_MODE, key); |
| c.updateAAD(AAD); |
| byte[] ctPlusTag = c.doFinal(PT); |
| |
| // subsequent encryption should fail unless re-init w/ different key+iv |
| checkISE(c); |
| |
| // Validate the retrieved parameters against the IV and tag length. |
| AlgorithmParameters params = c.getParameters(); |
| if (params == null) { |
| throw new Exception("getParameters() should not return null"); |
| } |
| GCMParameterSpec spec = params.getParameterSpec(GCMParameterSpec.class); |
| if (spec.getTLen() != (ctPlusTag.length - PT.length)*8) { |
| throw new Exception("Parameters contains incorrect TLen value"); |
| } |
| if (!Arrays.equals(spec.getIV(), c.getIV())) { |
| throw new Exception("Parameters contains incorrect IV value"); |
| } |
| |
| // Should be ok to use the same key+iv for decryption |
| c.init(Cipher.DECRYPT_MODE, key, params); |
| c.updateAAD(AAD); |
| byte[] recovered = c.doFinal(ctPlusTag); |
| if (!Arrays.equals(recovered, PT)) { |
| throw new Exception("decryption result mismatch"); |
| } |
| |
| // Now try to encrypt again using the same key+iv; should fail also |
| try { |
| c.init(Cipher.ENCRYPT_MODE, key, params); |
| throw new Exception("Should throw exception when same key+iv is used"); |
| } catch (InvalidAlgorithmParameterException iape) { |
| // expected |
| } |
| |
| // Now try to encrypt again using parameter-less init; should work |
| c.init(Cipher.ENCRYPT_MODE, key); |
| c.doFinal(PT); |
| |
| // make sure a different iv is used |
| byte[] iv = c.getIV(); |
| if (Arrays.equals(spec.getIV(), iv)) { |
| throw new Exception("IV should be different now"); |
| } |
| |
| // Now try to encrypt again using a different parameter; should work |
| c.init(Cipher.ENCRYPT_MODE, key, new GCMParameterSpec(128, new byte[30])); |
| c.updateAAD(AAD); |
| c.doFinal(PT); |
| // subsequent encryption should fail unless re-init w/ different key+iv |
| checkISE(c); |
| |
| // Now try decryption twice in a row; no re-init required and |
| // same parameters is used. |
| c.init(Cipher.DECRYPT_MODE, key, params); |
| c.updateAAD(AAD); |
| recovered = c.doFinal(ctPlusTag); |
| |
| c.updateAAD(AAD); |
| recovered = c.doFinal(ctPlusTag); |
| if (!Arrays.equals(recovered, PT)) { |
| throw new Exception("decryption result mismatch"); |
| } |
| |
| // Now try decryption again and re-init using the same parameters |
| c.init(Cipher.DECRYPT_MODE, key, params); |
| c.updateAAD(AAD); |
| recovered = c.doFinal(ctPlusTag); |
| |
| // init to decrypt w/o parameters; should fail with IKE as |
| // javadoc specified |
| try { |
| c.init(Cipher.DECRYPT_MODE, key); |
| throw new Exception("Should throw IKE for dec w/o params"); |
| } catch (InvalidKeyException ike) { |
| // expected |
| } |
| |
| // Lastly, try encryption AND decryption w/ wrong type of parameters, |
| // e.g. IvParameterSpec |
| try { |
| c.init(Cipher.ENCRYPT_MODE, key, new IvParameterSpec(iv)); |
| throw new Exception("Should throw IAPE"); |
| } catch (InvalidAlgorithmParameterException iape) { |
| // expected |
| } |
| try { |
| c.init(Cipher.DECRYPT_MODE, key, new IvParameterSpec(iv)); |
| throw new Exception("Should throw IAPE"); |
| } catch (InvalidAlgorithmParameterException iape) { |
| // expected |
| } |
| |
| System.out.println("Test Passed!"); |
| } |
| } |
| |