1/* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18/** 19 * @author Vera Y. Petrashkova 20 */ 21 22package org.apache.harmony.crypto.tests.support; 23 24import java.security.InvalidAlgorithmParameterException; 25import java.security.InvalidKeyException; 26import java.security.Key; 27import java.security.spec.AlgorithmParameterSpec; 28 29import javax.crypto.MacSpi; 30import javax.crypto.spec.SecretKeySpec; 31 32/** 33 * Additional class for verification of MacGeneratorSpi and MacSpi 34 */ 35 36public class MyMacSpi extends MacSpi { 37 38 private int length = 0; 39 40 @Override 41 protected int engineGetMacLength() { 42 return length; 43 } 44 45 @Override 46 protected void engineInit(Key key, AlgorithmParameterSpec params) 47 throws InvalidKeyException, InvalidAlgorithmParameterException { 48 if (params == null) { 49 if (!(key instanceof SecretKeySpec)) { 50 throw new IllegalArgumentException("params is null and key is SecretKeySpec"); 51 } 52 } 53 } 54 55 @Override 56 protected void engineUpdate(byte input) { 57 } 58 59 @Override 60 protected void engineUpdate(byte[] input, int offset, int len) { 61 if (offset >= 0 && len >= 0) { 62 length = len; 63 } 64 } 65 66 @Override 67 protected byte[] engineDoFinal() { 68 return new byte[length]; 69 } 70 71 @Override 72 protected void engineReset() { 73 length++; 74 } 75}