001/* 002 * ==================================================================== 003 * Licensed to the Apache Software Foundation (ASF) under one 004 * or more contributor license agreements. See the NOTICE file 005 * distributed with this work for additional information 006 * regarding copyright ownership. The ASF licenses this file 007 * to you under the Apache License, Version 2.0 (the 008 * "License"); you may not use this file except in compliance 009 * with the License. You may obtain a copy of the License at 010 * 011 * http://www.apache.org/licenses/LICENSE-2.0 012 * 013 * Unless required by applicable law or agreed to in writing, 014 * software distributed under the License is distributed on an 015 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 016 * KIND, either express or implied. See the License for the 017 * specific language governing permissions and limitations 018 * under the License. 019 * ==================================================================== 020 * 021 * This software consists of voluntary contributions made by many 022 * individuals on behalf of the Apache Software Foundation. For more 023 * information on the Apache Software Foundation, please see 024 * <http://www.apache.org/>. 025 * 026 */ 027package org.apache.http.impl.auth; 028 029import java.io.IOException; 030import java.io.OutputStream; 031import java.security.MessageDigest; 032 033class HttpEntityDigester extends OutputStream { 034 035 private final MessageDigest digester; 036 private boolean closed; 037 private byte[] digest; 038 039 HttpEntityDigester(final MessageDigest digester) { 040 super(); 041 this.digester = digester; 042 this.digester.reset(); 043 } 044 045 @Override 046 public void write(final int b) throws IOException { 047 if (this.closed) { 048 throw new IOException("Stream has been already closed"); 049 } 050 this.digester.update((byte) b); 051 } 052 053 @Override 054 public void write(final byte[] b, final int off, final int len) throws IOException { 055 if (this.closed) { 056 throw new IOException("Stream has been already closed"); 057 } 058 this.digester.update(b, off, len); 059 } 060 061 @Override 062 public void close() throws IOException { 063 if (this.closed) { 064 return; 065 } 066 this.closed = true; 067 this.digest = this.digester.digest(); 068 super.close(); 069 } 070 071 public byte[] getDigest() { 072 return this.digest; 073 } 074 075}