| /* |
| * reserved comment block |
| * DO NOT REMOVE OR ALTER! |
| */ |
| /* |
| * Copyright 2005 The Apache Software Foundation. |
| * |
| * Licensed 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. |
| * |
| */ |
| /* |
| * Copyright (c) 2005, 2008, Oracle and/or its affiliates. All rights reserved. |
| */ |
| /* |
| * $Id: DOMExcC14NMethod.java,v 1.2 2008/07/24 15:20:32 mullan Exp $ |
| */ |
| package org.jcp.xml.dsig.internal.dom; |
| |
| import javax.xml.crypto.*; |
| import javax.xml.crypto.dsig.*; |
| import javax.xml.crypto.dsig.spec.C14NMethodParameterSpec; |
| import javax.xml.crypto.dsig.spec.ExcC14NParameterSpec; |
| import javax.xml.crypto.dsig.spec.TransformParameterSpec; |
| |
| import java.security.InvalidAlgorithmParameterException; |
| import java.security.spec.AlgorithmParameterSpec; |
| import java.util.*; |
| import org.w3c.dom.Element; |
| |
| import com.sun.org.apache.xml.internal.security.c14n.Canonicalizer; |
| import com.sun.org.apache.xml.internal.security.c14n.InvalidCanonicalizerException; |
| |
| /** |
| * DOM-based implementation of CanonicalizationMethod for Exclusive |
| * Canonical XML algorithm (with or without comments). |
| * Uses Apache XML-Sec Canonicalizer. |
| * |
| * @author Sean Mullan |
| */ |
| public final class DOMExcC14NMethod extends ApacheCanonicalizer { |
| |
| public void init(TransformParameterSpec params) |
| throws InvalidAlgorithmParameterException { |
| if (params != null) { |
| if (!(params instanceof ExcC14NParameterSpec)) { |
| throw new InvalidAlgorithmParameterException |
| ("params must be of type ExcC14NParameterSpec"); |
| } |
| this.params = (C14NMethodParameterSpec) params; |
| } |
| } |
| |
| public void init(XMLStructure parent, XMLCryptoContext context) |
| throws InvalidAlgorithmParameterException { |
| super.init(parent, context); |
| Element paramsElem = DOMUtils.getFirstChildElement(transformElem); |
| if (paramsElem == null) { |
| this.params = null; |
| this.inclusiveNamespaces = null; |
| return; |
| } |
| unmarshalParams(paramsElem); |
| } |
| |
| private void unmarshalParams(Element paramsElem) { |
| String prefixListAttr = paramsElem.getAttributeNS(null, "PrefixList"); |
| this.inclusiveNamespaces = prefixListAttr; |
| int begin = 0; |
| int end = prefixListAttr.indexOf(' '); |
| List prefixList = new ArrayList(); |
| while (end != -1) { |
| prefixList.add(prefixListAttr.substring(begin, end)); |
| begin = end + 1; |
| end = prefixListAttr.indexOf(' ', begin); |
| } |
| if (begin <= prefixListAttr.length()) { |
| prefixList.add(prefixListAttr.substring(begin)); |
| } |
| this.params = new ExcC14NParameterSpec(prefixList); |
| } |
| |
| public void marshalParams(XMLStructure parent, XMLCryptoContext context) |
| throws MarshalException { |
| |
| super.marshalParams(parent, context); |
| AlgorithmParameterSpec spec = getParameterSpec(); |
| if (spec == null) { |
| return; |
| } |
| |
| String prefix = |
| DOMUtils.getNSPrefix(context, CanonicalizationMethod.EXCLUSIVE); |
| Element excElem = DOMUtils.createElement |
| (ownerDoc, "InclusiveNamespaces", |
| CanonicalizationMethod.EXCLUSIVE, prefix); |
| if (prefix == null || prefix.length() == 0) { |
| excElem.setAttributeNS("http://www.w3.org/2000/xmlns/", "xmlns", |
| CanonicalizationMethod.EXCLUSIVE); |
| } else { |
| excElem.setAttributeNS("http://www.w3.org/2000/xmlns/", |
| "xmlns:" + prefix, CanonicalizationMethod.EXCLUSIVE); |
| } |
| |
| ExcC14NParameterSpec params = (ExcC14NParameterSpec) spec; |
| StringBuffer prefixListAttr = new StringBuffer(""); |
| List prefixList = params.getPrefixList(); |
| for (int i = 0, size = prefixList.size(); i < size; i++) { |
| prefixListAttr.append((String) prefixList.get(i)); |
| if (i < size - 1) { |
| prefixListAttr.append(" "); |
| } |
| } |
| DOMUtils.setAttribute(excElem, "PrefixList", prefixListAttr.toString()); |
| this.inclusiveNamespaces = prefixListAttr.toString(); |
| transformElem.appendChild(excElem); |
| } |
| |
| public String getParamsNSURI() { |
| return CanonicalizationMethod.EXCLUSIVE; |
| } |
| |
| public Data transform(Data data, XMLCryptoContext xc) |
| throws TransformException { |
| |
| // ignore comments if dereferencing same-document URI that require |
| // you to omit comments, even if the Transform says otherwise - |
| // this is to be compliant with section 4.3.3.3 of W3C Rec. |
| if (data instanceof DOMSubTreeData) { |
| DOMSubTreeData subTree = (DOMSubTreeData) data; |
| if (subTree.excludeComments()) { |
| try { |
| apacheCanonicalizer = Canonicalizer.getInstance |
| (CanonicalizationMethod.EXCLUSIVE); |
| } catch (InvalidCanonicalizerException ice) { |
| throw new TransformException |
| ("Couldn't find Canonicalizer for: " + |
| CanonicalizationMethod.EXCLUSIVE + ": " + |
| ice.getMessage(), ice); |
| } |
| } |
| } |
| |
| return canonicalize(data, xc); |
| } |
| } |