| /** |
| * 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.apache.xml.security.stax.impl.util; |
| |
| import java.io.OutputStream; |
| import java.security.MessageDigest; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * A Streaming based message-digest implementation |
| * |
| */ |
| public class DigestOutputStream extends OutputStream { |
| |
| protected static final transient Logger LOG = LoggerFactory.getLogger(DigestOutputStream.class); |
| protected static final transient boolean isDebugEnabled = LOG.isDebugEnabled(); |
| |
| private final MessageDigest messageDigest; |
| private StringBuilder stringBuilder; |
| |
| public DigestOutputStream(MessageDigest messageDigest) { |
| this.messageDigest = messageDigest; |
| if (isDebugEnabled) { |
| stringBuilder = new StringBuilder(); |
| } |
| } |
| |
| @Override |
| public void write(byte[] arg0) { |
| write(arg0, 0, arg0.length); |
| } |
| |
| @Override |
| public void write(int arg0) { |
| byte asByte = (byte) arg0; |
| messageDigest.update(asByte); |
| if (isDebugEnabled) { |
| stringBuilder.append((char)asByte); |
| } |
| } |
| |
| @Override |
| public void write(byte[] arg0, int arg1, int arg2) { |
| messageDigest.update(arg0, arg1, arg2); |
| if (isDebugEnabled) { |
| stringBuilder.append(new String(arg0, arg1, arg2, java.nio.charset.StandardCharsets.UTF_8)); |
| } |
| } |
| |
| public byte[] getDigestValue() { |
| if (isDebugEnabled) { |
| LOG.debug("Pre Digest: "); |
| LOG.debug(stringBuilder.toString()); |
| LOG.debug("End pre Digest "); |
| stringBuilder = new StringBuilder(); |
| } |
| return messageDigest.digest(); |
| } |
| } |