126 lines
3.5 KiB
Java
126 lines
3.5 KiB
Java
/*
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* reserved comment block
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* DO NOT REMOVE OR ALTER!
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*/
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/**
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing,
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* software distributed under the License is distributed on an
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* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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* KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations
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* under the License.
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*/
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/*
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* Copyright (c) 2005, 2018, Oracle and/or its affiliates. All rights reserved.
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*/
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/*
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* $Id: DigesterOutputStream.java, v 1.5 2005/12/20 20:02:39 mullan Exp $
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*/
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package org.jcp.xml.dsig.internal;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.OutputStream;
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import java.security.MessageDigest;
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import com.sun.org.apache.xml.internal.security.utils.UnsyncByteArrayOutputStream;
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/**
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* This class has been modified slightly to use java.security.MessageDigest
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* objects as input, rather than
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* com.sun.org.apache.xml.internal.security.algorithms.MessageDigestAlgorithm objects.
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* It also optionally caches the input bytes.
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*
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*/
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public class DigesterOutputStream extends OutputStream {
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private static final com.sun.org.slf4j.internal.Logger LOG =
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com.sun.org.slf4j.internal.LoggerFactory.getLogger(DigesterOutputStream.class);
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private final boolean buffer;
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private UnsyncByteArrayOutputStream bos;
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private final MessageDigest md;
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/**
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* Creates a DigesterOutputStream.
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*
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* @param md the MessageDigest
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*/
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public DigesterOutputStream(MessageDigest md) {
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this(md, false);
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}
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/**
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* Creates a DigesterOutputStream.
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*
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* @param md the MessageDigest
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* @param buffer if true, caches the input bytes
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*/
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public DigesterOutputStream(MessageDigest md, boolean buffer) {
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this.md = md;
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this.buffer = buffer;
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if (buffer) {
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bos = new UnsyncByteArrayOutputStream();
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}
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}
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public void write(int input) {
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if (buffer) {
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bos.write(input);
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}
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md.update((byte)input);
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}
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@Override
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public void write(byte[] input, int offset, int len) {
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if (buffer) {
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bos.write(input, offset, len);
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}
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if (LOG.isDebugEnabled()) {
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LOG.debug("Pre-digested input:");
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StringBuilder sb = new StringBuilder(len);
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for (int i = offset; i < (offset + len); i++) {
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sb.append((char)input[i]);
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}
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LOG.debug(sb.toString());
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}
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md.update(input, offset, len);
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}
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/**
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* @return the digest value
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*/
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public byte[] getDigestValue() {
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return md.digest();
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}
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/**
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* @return an input stream containing the cached bytes, or
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* null if not cached
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*/
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public InputStream getInputStream() {
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if (buffer) {
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return new ByteArrayInputStream(bos.toByteArray());
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} else {
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return null;
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}
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}
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@Override
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public void close() throws IOException {
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if (buffer) {
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bos.close();
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}
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}
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}
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