author | weijun |
Thu, 10 Oct 2019 17:36:38 +0300 | |
changeset 59240 | b3116877866f |
parent 54731 | 81de17a33575 |
permissions | -rw-r--r-- |
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/* |
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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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package com.sun.org.apache.xml.internal.security.transforms.implementations; |
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import java.io.IOException; |
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import java.io.OutputStream; |
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import javax.xml.parsers.ParserConfigurationException; |
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import com.sun.org.apache.xml.internal.security.c14n.CanonicalizationException; |
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import com.sun.org.apache.xml.internal.security.signature.XMLSignatureInput; |
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import com.sun.org.apache.xml.internal.security.transforms.Transform; |
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import com.sun.org.apache.xml.internal.security.transforms.TransformSpi; |
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import com.sun.org.apache.xml.internal.security.transforms.TransformationException; |
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import com.sun.org.apache.xml.internal.security.transforms.Transforms; |
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import com.sun.org.apache.xml.internal.security.utils.XMLUtils; |
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import org.w3c.dom.Document; |
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import org.w3c.dom.Element; |
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import org.w3c.dom.Node; |
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import org.w3c.dom.Text; |
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import org.xml.sax.SAXException; |
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import com.sun.org.apache.xml.internal.security.utils.JavaUtils; |
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/** |
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* Implements the {@code http://www.w3.org/2000/09/xmldsig#base64} decoding |
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* transform. |
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* |
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* <p>The normative specification for base64 decoding transforms is |
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* <A HREF="http://www.w3.org/TR/2001/CR-xmldsig-core-20010419/#ref-MIME">[MIME]</A>. |
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* The base64 Transform element has no content. The input |
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* is decoded by the algorithms. This transform is useful if an |
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* application needs to sign the raw data associated with the encoded |
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* content of an element. </p> |
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* |
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* <p>This transform requires an octet stream for input. |
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* If an XPath node-set (or sufficiently functional alternative) is |
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* given as input, then it is converted to an octet stream by |
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* performing operations LOGically equivalent to 1) applying an XPath |
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* transform with expression self::text(), then 2) taking the string-value |
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* of the node-set. Thus, if an XML element is identified by a barename |
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* XPointer in the Reference URI, and its content consists solely of base64 |
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* encoded character data, then this transform automatically strips away the |
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* start and end tags of the identified element and any of its descendant |
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* elements as well as any descendant comments and processing instructions. |
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* The output of this transform is an octet stream.</p> |
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* |
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*/ |
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public class TransformBase64Decode extends TransformSpi { |
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/** Field implementedTransformURI */ |
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public static final String implementedTransformURI = |
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Transforms.TRANSFORM_BASE64_DECODE; |
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/** |
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* Method engineGetURI |
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* |
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* {@inheritDoc} |
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*/ |
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protected String engineGetURI() { |
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return TransformBase64Decode.implementedTransformURI; |
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} |
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/** |
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* Method enginePerformTransform |
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* |
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* @param input |
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* @return {@link XMLSignatureInput} as the result of transformation |
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* {@inheritDoc} |
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* @throws CanonicalizationException |
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* @throws IOException |
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* @throws TransformationException |
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*/ |
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protected XMLSignatureInput enginePerformTransform( |
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XMLSignatureInput input, Transform transformObject |
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) throws IOException, CanonicalizationException, TransformationException { |
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return enginePerformTransform(input, null, transformObject); |
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} |
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protected XMLSignatureInput enginePerformTransform( |
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XMLSignatureInput input, OutputStream os, Transform transformObject |
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) throws IOException, CanonicalizationException, TransformationException { |
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if (input.isElement()) { |
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Node el = input.getSubNode(); |
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if (input.getSubNode().getNodeType() == Node.TEXT_NODE) { |
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el = el.getParentNode(); |
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} |
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StringBuilder sb = new StringBuilder(); |
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traverseElement((Element)el, sb); |
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if (os == null) { |
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byte[] decodedBytes = XMLUtils.decode(sb.toString()); |
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XMLSignatureInput output = new XMLSignatureInput(decodedBytes); |
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output.setSecureValidation(secureValidation); |
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return output; |
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} |
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byte[] bytes = XMLUtils.decode(sb.toString()); |
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os.write(bytes); |
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XMLSignatureInput output = new XMLSignatureInput((byte[])null); |
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output.setSecureValidation(secureValidation); |
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output.setOutputStream(os); |
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return output; |
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} |
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if (input.isOctetStream() || input.isNodeSet()) { |
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if (os == null) { |
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byte[] base64Bytes = input.getBytes(); |
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byte[] decodedBytes = XMLUtils.decode(base64Bytes); |
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XMLSignatureInput output = new XMLSignatureInput(decodedBytes); |
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output.setSecureValidation(secureValidation); |
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return output; |
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} |
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if (input.isByteArray() || input.isNodeSet()) { |
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byte[] bytes = XMLUtils.decode(input.getBytes()); |
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os.write(bytes); |
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} else { |
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byte[] inputBytes = JavaUtils.getBytesFromStream(input.getOctetStreamReal()); |
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byte[] bytes = XMLUtils.decode(inputBytes); |
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os.write(bytes); |
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} |
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XMLSignatureInput output = new XMLSignatureInput((byte[])null); |
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output.setSecureValidation(secureValidation); |
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output.setOutputStream(os); |
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return output; |
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} |
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try { |
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//Exceptional case there is current not text case testing this(Before it was a |
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//a common case). |
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Document doc = |
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XMLUtils.read(input.getOctetStream(), secureValidation); |
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Element rootNode = doc.getDocumentElement(); |
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StringBuilder sb = new StringBuilder(); |
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traverseElement(rootNode, sb); |
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byte[] decodedBytes = XMLUtils.decode(sb.toString()); |
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XMLSignatureInput output = new XMLSignatureInput(decodedBytes); |
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output.setSecureValidation(secureValidation); |
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return output; |
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} catch (ParserConfigurationException e) { |
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throw new TransformationException(e, "c14n.Canonicalizer.Exception"); |
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} catch (SAXException e) { |
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throw new TransformationException(e, "SAX exception"); |
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} |
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} |
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|
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void traverseElement(Element node, StringBuilder sb) { |
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Node sibling = node.getFirstChild(); |
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while (sibling != null) { |
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switch (sibling.getNodeType()) { |
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case Node.ELEMENT_NODE: |
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traverseElement((Element)sibling, sb); |
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break; |
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case Node.TEXT_NODE: |
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sb.append(((Text)sibling).getData()); |
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} |
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sibling = sibling.getNextSibling(); |
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} |
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} |
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} |