1 /*
2 * ====================================================================
3 * Licensed to the Apache Software Foundation (ASF) under one
4 * or more contributor license agreements. See the NOTICE file
5 * distributed with this work for additional information
6 * regarding copyright ownership. The ASF licenses this file
7 * to you under the Apache License, Version 2.0 (the
8 * "License"); you may not use this file except in compliance
9 * with the License. You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing,
14 * software distributed under the License is distributed on an
15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
16 * KIND, either express or implied. See the License for the
17 * specific language governing permissions and limitations
18 * under the License.
19 * ====================================================================
20 *
21 * This software consists of voluntary contributions made by many
22 * individuals on behalf of the Apache Software Foundation. For more
23 * information on the Apache Software Foundation, please see
24 * <http://www.apache.org/>.
25 *
26 */
27 package org.apache.http.impl.auth;
28
29 import java.io.IOException;
30 import java.io.OutputStream;
31 import java.security.MessageDigest;
32
33 class HttpEntityDigester extends OutputStream {
34
35 private final MessageDigest digester;
36 private boolean closed;
37 private byte[] digest;
38
39 HttpEntityDigester(final MessageDigest digester) {
40 super();
41 this.digester = digester;
42 this.digester.reset();
43 }
44
45 @Override
46 public void write(final int b) throws IOException {
47 if (this.closed) {
48 throw new IOException("Stream has been already closed");
49 }
50 this.digester.update((byte) b);
51 }
52
53 @Override
54 public void write(final byte[] b, final int off, final int len) throws IOException {
55 if (this.closed) {
56 throw new IOException("Stream has been already closed");
57 }
58 this.digester.update(b, off, len);
59 }
60
61 @Override
62 public void close() throws IOException {
63 if (this.closed) {
64 return;
65 }
66 this.closed = true;
67 this.digest = this.digester.digest();
68 super.close();
69 }
70
71 public byte[] getDigest() {
72 return this.digest;
73 }
74
75 }