| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.jclouds.crypto; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| |
| import javax.crypto.Mac; |
| |
| import com.google.common.annotations.Beta; |
| import com.google.common.io.ByteProcessor; |
| |
| /** |
| * functions for {@link Mac} |
| */ |
| @Beta |
| public class Macs { |
| |
| /** |
| * Computes and returns the MAC value for a supplied input stream. |
| * |
| * @param mac |
| * the mac object |
| * @return the result of {@link Mac#doFinal()} on {@link ByteProcessor#getResult()} |
| */ |
| public static ByteProcessor<byte[]> asByteProcessor(final Mac mac) { |
| checkNotNull(mac, "mac"); |
| return new ByteProcessor<byte[]>() { |
| public boolean processBytes(byte[] buf, int off, int len) { |
| mac.update(buf, off, len); |
| return true; |
| } |
| |
| public byte[] getResult() { |
| return mac.doFinal(); |
| } |
| }; |
| } |
| |
| } |