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/**
 * 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
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package com.sun.org.apache.xml.internal.security.signature;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;

import javax.xml.XMLConstants;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;

import com.sun.org.apache.xml.internal.security.c14n.CanonicalizationException;
import com.sun.org.apache.xml.internal.security.c14n.implementations.CanonicalizerBase;
import com.sun.org.apache.xml.internal.security.c14n.implementations.Canonicalizer20010315OmitComments;
import com.sun.org.apache.xml.internal.security.c14n.implementations.Canonicalizer11_OmitComments;
import com.sun.org.apache.xml.internal.security.exceptions.XMLSecurityRuntimeException;
import com.sun.org.apache.xml.internal.security.utils.JavaUtils;
import com.sun.org.apache.xml.internal.security.utils.XMLUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Node;
import org.xml.sax.SAXException;


Class XMLSignatureInput

Author:Christian Geuer-Pollmann
$todo$ check whether an XMLSignatureInput can be _both_, octet stream _and_ node set?
/**
 * Class XMLSignatureInput
 *
 * @author Christian Geuer-Pollmann
 * $todo$ check whether an XMLSignatureInput can be _both_, octet stream _and_ node set?
 */
public class XMLSignatureInput {
    /*
     * The XMLSignature Input can be either:
     *   A byteArray like with/or without InputStream.
     *   Or a nodeSet like defined either:
     *       * as a collection of nodes
     *       * or as subnode excluding or not comments and excluding or
     *         not other nodes.
     */

    
Some InputStreams do not support the InputStream.reset method, so we read it in completely and work on our Proxy. 
/**
     * Some InputStreams do not support the {@link java.io.InputStream#reset}
     * method, so we read it in completely and work on our Proxy.
     */
    private InputStream inputOctetStreamProxy = null;
    
The original NodeSet for this XMLSignatureInput

/**
     * The original NodeSet for this XMLSignatureInput
     */
    private Set<Node> inputNodeSet = null;
    
The original Element

/**
     * The original Element
     */
    private Node subNode = null;
    
Exclude Node *for enveloped transformations*

/**
     * Exclude Node *for enveloped transformations*
     */
    private Node excludeNode = null;
    /**
     *
     */
    private boolean excludeComments = false;

    private boolean isNodeSet = false;
    
A cached bytes

/**
     * A cached bytes
     */
    private byte[] bytes = null;

    
Some Transforms may require explicit MIME type, charset (IANA registered
"character set"), or other such information concerning the data they are
receiving from an earlier Transform or the source data, although no
Transform algorithm specified in this document needs such explicit
information. Such data characteristics are provided as parameters to the
Transform algorithm and should be described in the specification for the
algorithm.

/**
     * Some Transforms may require explicit MIME type, charset (IANA registered
     * "character set"), or other such information concerning the data they are
     * receiving from an earlier Transform or the source data, although no
     * Transform algorithm specified in this document needs such explicit
     * information. Such data characteristics are provided as parameters to the
     * Transform algorithm and should be described in the specification for the
     * algorithm.
     */
    private String mimeType = null;

    
Field sourceURI

/**
     * Field sourceURI
     */
    private String sourceURI = null;

    
Node Filter list.

/**
     * Node Filter list.
     */
    private List<NodeFilter> nodeFilters = new ArrayList<NodeFilter>();

    private boolean needsToBeExpanded = false;
    private OutputStream outputStream = null;

    private DocumentBuilderFactory dfactory;

    
Construct a XMLSignatureInput from an octet array.


This is a comfort method, which internally converts the byte[] array into
an InputStream

NOTE: no defensive copy


Params:
  • inputOctets – an octet array which including XML document or node
/**
     * Construct a XMLSignatureInput from an octet array.
     * <p>
     * This is a comfort method, which internally converts the byte[] array into
     * an InputStream
     * <p>NOTE: no defensive copy</p>
     * @param inputOctets an octet array which including XML document or node
     */
    public XMLSignatureInput(byte[] inputOctets) {
        // NO defensive copy
        this.bytes = inputOctets;
    }

    
Constructs a XMLSignatureInput from an octet stream. The
stream is directly read.

Params:
  • inputOctetStream – 
/**
     * Constructs a <code>XMLSignatureInput</code> from an octet stream. The
     * stream is directly read.
     *
     * @param inputOctetStream
     */
    public XMLSignatureInput(InputStream inputOctetStream)  {
        this.inputOctetStreamProxy = inputOctetStream;
    }

    
Construct a XMLSignatureInput from a subtree rooted by rootNode. This
method included the node and all his descendants in the output.

Params:
  • rootNode – 
/**
     * Construct a XMLSignatureInput from a subtree rooted by rootNode. This
     * method included the node and <I>all</I> his descendants in the output.
     *
     * @param rootNode
     */
    public XMLSignatureInput(Node rootNode) {
        this.subNode = rootNode;
    }

    
Constructor XMLSignatureInput

Params:
  • inputNodeSet – 
/**
     * Constructor XMLSignatureInput
     *
     * @param inputNodeSet
     */
    public XMLSignatureInput(Set<Node> inputNodeSet) {
        this.inputNodeSet = inputNodeSet;
    }

    
Check if the structure needs to be expanded.

Returns:true if so.
/**
     * Check if the structure needs to be expanded.
     * @return true if so.
     */
    public boolean isNeedsToBeExpanded() {
        return needsToBeExpanded;
    }

    
Set if the structure needs to be expanded.

Params:
  • needsToBeExpanded – true if so.
/**
     * Set if the structure needs to be expanded.
     * @param needsToBeExpanded true if so.
     */
    public void setNeedsToBeExpanded(boolean needsToBeExpanded) {
        this.needsToBeExpanded = needsToBeExpanded;
    }

    
Returns the node set from input which was specified as the parameter of XMLSignatureInput constructor 
Throws:
Returns:the node set
/**
     * Returns the node set from input which was specified as the parameter of
     * {@link XMLSignatureInput} constructor
     *
     * @return the node set
     * @throws SAXException
     * @throws IOException
     * @throws ParserConfigurationException
     * @throws CanonicalizationException
     */
    public Set<Node> getNodeSet() throws CanonicalizationException, ParserConfigurationException,
        IOException, SAXException {
        return getNodeSet(false);
    }

    
Get the Input NodeSet.

Returns:the Input NodeSet.
/**
     * Get the Input NodeSet.
     * @return the Input NodeSet.
     */
    public Set<Node> getInputNodeSet() {
        return inputNodeSet;
    }

    
Returns the node set from input which was specified as the parameter of XMLSignatureInput constructor 
Params:
  • circumvent – 
Throws:
Returns:the node set
/**
     * Returns the node set from input which was specified as the parameter of
     * {@link XMLSignatureInput} constructor
     * @param circumvent
     *
     * @return the node set
     * @throws SAXException
     * @throws IOException
     * @throws ParserConfigurationException
     * @throws CanonicalizationException
     */
    public Set<Node> getNodeSet(boolean circumvent) throws ParserConfigurationException,
        IOException, SAXException, CanonicalizationException {
        if (inputNodeSet != null) {
            return inputNodeSet;
        }
        if (inputOctetStreamProxy == null && subNode != null) {
            if (circumvent) {
                XMLUtils.circumventBug2650(XMLUtils.getOwnerDocument(subNode));
            }
            inputNodeSet = new LinkedHashSet<Node>();
            XMLUtils.getSet(subNode, inputNodeSet, excludeNode, excludeComments);
            return inputNodeSet;
        } else if (isOctetStream()) {
            convertToNodes();
            Set<Node> result = new LinkedHashSet<Node>();
            XMLUtils.getSet(subNode, result, null, false);
            return result;
        }

        throw new RuntimeException("getNodeSet() called but no input data present");
    }

    
Returns the Octet stream(byte Stream) from input which was specified as the parameter of XMLSignatureInput constructor 
Throws:
Returns:the Octet stream(byte Stream) from input which was specified as the parameter of XMLSignatureInput constructor
/**
     * Returns the Octet stream(byte Stream) from input which was specified as
     * the parameter of {@link XMLSignatureInput} constructor
     *
     * @return the Octet stream(byte Stream) from input which was specified as
     * the parameter of {@link XMLSignatureInput} constructor
     * @throws IOException
     */
    public InputStream getOctetStream() throws IOException  {
        if (inputOctetStreamProxy != null) {
            return inputOctetStreamProxy;
        }

        if (bytes != null) {
            inputOctetStreamProxy = new ByteArrayInputStream(bytes);
            return inputOctetStreamProxy;
        }

        return null;
    }

    
Returns:real octet stream
/**
     * @return real octet stream
     */
    public InputStream getOctetStreamReal() {
        return inputOctetStreamProxy;
    }

    
Returns the byte array from input which was specified as the parameter of XMLSignatureInput constructor 
Throws:
Returns:the byte[] from input which was specified as the parameter of XMLSignatureInput constructor
/**
     * Returns the byte array from input which was specified as the parameter of
     * {@link XMLSignatureInput} constructor
     *
     * @return the byte[] from input which was specified as the parameter of
     * {@link XMLSignatureInput} constructor
     *
     * @throws CanonicalizationException
     * @throws IOException
     */
    public byte[] getBytes() throws IOException, CanonicalizationException {
        byte[] inputBytes = getBytesFromInputStream();
        if (inputBytes != null) {
            return inputBytes;
        }
        Canonicalizer20010315OmitComments c14nizer = new Canonicalizer20010315OmitComments();
        bytes = c14nizer.engineCanonicalize(this);
        return bytes;
    }

    
Determines if the object has been set up with a Node set

Returns:true if the object has been set up with a Node set
/**
     * Determines if the object has been set up with a Node set
     *
     * @return true if the object has been set up with a Node set
     */
    public boolean isNodeSet() {
        return ((inputOctetStreamProxy == null
            && inputNodeSet != null) || isNodeSet);
    }

    
Determines if the object has been set up with an Element

Returns:true if the object has been set up with an Element
/**
     * Determines if the object has been set up with an Element
     *
     * @return true if the object has been set up with an Element
     */
    public boolean isElement() {
        return (inputOctetStreamProxy == null && subNode != null
            && inputNodeSet == null && !isNodeSet);
    }

    
Determines if the object has been set up with an octet stream

Returns:true if the object has been set up with an octet stream
/**
     * Determines if the object has been set up with an octet stream
     *
     * @return true if the object has been set up with an octet stream
     */
    public boolean isOctetStream() {
        return ((inputOctetStreamProxy != null || bytes != null)
          && (inputNodeSet == null && subNode == null));
    }

    
Determines if setOutputStream has been called with a non-null OutputStream. 
Returns:true if setOutputStream has been called with a non-null OutputStream
/**
     * Determines if {@link #setOutputStream} has been called with a
     * non-null OutputStream.
     *
     * @return true if {@link #setOutputStream} has been called with a
     * non-null OutputStream
     */
    public boolean isOutputStreamSet() {
        return outputStream != null;
    }

    
Determines if the object has been set up with a ByteArray

Returns:true is the object has been set up with an octet stream
/**
     * Determines if the object has been set up with a ByteArray
     *
     * @return true is the object has been set up with an octet stream
     */
    public boolean isByteArray() {
        return (bytes != null && (this.inputNodeSet == null && subNode == null));
    }

    
Is the object correctly set up?

Returns:true if the object has been set up correctly
/**
     * Is the object correctly set up?
     *
     * @return true if the object has been set up correctly
     */
    public boolean isInitialized() {
        return isOctetStream() || isNodeSet();
    }

    
Returns mimeType

Returns:mimeType
/**
     * Returns mimeType
     *
     * @return mimeType
     */
    public String getMIMEType() {
        return mimeType;
    }

    
Sets mimeType

Params:
  • mimeType – 
/**
     * Sets mimeType
     *
     * @param mimeType
     */
    public void setMIMEType(String mimeType) {
        this.mimeType = mimeType;
    }

    
Return SourceURI

Returns:SourceURI
/**
     * Return SourceURI
     *
     * @return SourceURI
     */
    public String getSourceURI() {
        return sourceURI;
    }

    
Sets SourceURI

Params:
  • sourceURI – 
/**
     * Sets SourceURI
     *
     * @param sourceURI
     */
    public void setSourceURI(String sourceURI) {
        this.sourceURI = sourceURI;
    }

    
Method toString

@inheritDoc
/**
     * Method toString
     * @inheritDoc
     */
    public String toString() {
        if (isNodeSet()) {
            return "XMLSignatureInput/NodeSet/" + inputNodeSet.size()
                   + " nodes/" + getSourceURI();
        }
        if (isElement()) {
            return "XMLSignatureInput/Element/" + subNode
                + " exclude "+ excludeNode + " comments:"
                + excludeComments +"/" + getSourceURI();
        }
        try {
            return "XMLSignatureInput/OctetStream/" + getBytes().length
                   + " octets/" + getSourceURI();
        } catch (IOException iex) {
            return "XMLSignatureInput/OctetStream//" + getSourceURI();
        } catch (CanonicalizationException cex) {
            return "XMLSignatureInput/OctetStream//" + getSourceURI();
        }
    }

    
Method getHTMLRepresentation

Throws:
  • XMLSignatureException – 
Returns:The HTML representation for this XMLSignature
/**
     * Method getHTMLRepresentation
     *
     * @throws XMLSignatureException
     * @return The HTML representation for this XMLSignature
     */
    public String getHTMLRepresentation() throws XMLSignatureException {
        XMLSignatureInputDebugger db = new XMLSignatureInputDebugger(this);
        return db.getHTMLRepresentation();
    }

    
Method getHTMLRepresentation

Params:
  • inclusiveNamespaces – 
Throws:
Returns:The HTML representation for this XMLSignature
/**
     * Method getHTMLRepresentation
     *
     * @param inclusiveNamespaces
     * @throws XMLSignatureException
     * @return The HTML representation for this XMLSignature
     */
    public String getHTMLRepresentation(Set<String> inclusiveNamespaces)
       throws XMLSignatureException {
        XMLSignatureInputDebugger db =
            new XMLSignatureInputDebugger(this, inclusiveNamespaces);
        return db.getHTMLRepresentation();
    }

    
Gets the exclude node of this XMLSignatureInput

Returns:Returns the excludeNode.
/**
     * Gets the exclude node of this XMLSignatureInput
     * @return Returns the excludeNode.
     */
    public Node getExcludeNode() {
        return excludeNode;
    }

    
Sets the exclude node of this XMLSignatureInput

Params:
  • excludeNode – The excludeNode to set.
/**
     * Sets the exclude node of this XMLSignatureInput
     * @param excludeNode The excludeNode to set.
     */
    public void setExcludeNode(Node excludeNode) {
        this.excludeNode = excludeNode;
    }

    
Gets the node of this XMLSignatureInput

Returns:The excludeNode set.
/**
     * Gets the node of this XMLSignatureInput
     * @return The excludeNode set.
     */
    public Node getSubNode() {
        return subNode;
    }

    
Returns:Returns the excludeComments.
/**
     * @return Returns the excludeComments.
     */
    public boolean isExcludeComments() {
        return excludeComments;
    }

    
Params:
  • excludeComments – The excludeComments to set.
/**
     * @param excludeComments The excludeComments to set.
     */
    public void setExcludeComments(boolean excludeComments) {
        this.excludeComments = excludeComments;
    }

    
Params:
  • diOs – 
Throws:
/**
     * @param diOs
     * @throws IOException
     * @throws CanonicalizationException
     */
    public void updateOutputStream(OutputStream diOs)
        throws CanonicalizationException, IOException {
        updateOutputStream(diOs, false);
    }

    public void updateOutputStream(OutputStream diOs, boolean c14n11)
        throws CanonicalizationException, IOException {
        if (diOs == outputStream) {
            return;
        }
        if (bytes != null) {
            diOs.write(bytes);
        } else if (inputOctetStreamProxy == null) {
            CanonicalizerBase c14nizer = null;
            if (c14n11) {
                c14nizer = new Canonicalizer11_OmitComments();
            } else {
                c14nizer = new Canonicalizer20010315OmitComments();
            }
            c14nizer.setWriter(diOs);
            c14nizer.engineCanonicalize(this);
        } else {
            byte[] buffer = new byte[4 * 1024];
            int bytesread = 0;
            try {
                while ((bytesread = inputOctetStreamProxy.read(buffer)) != -1) {
                    diOs.write(buffer, 0, bytesread);
                }
            } catch (IOException ex) {
                inputOctetStreamProxy.close();
                throw ex;
            }
        }
    }

    
Params:
  • os – 
/**
     * @param os
     */
    public void setOutputStream(OutputStream os) {
        outputStream = os;
    }

    private byte[] getBytesFromInputStream() throws IOException {
        if (bytes != null) {
            return bytes;
        }
        if (inputOctetStreamProxy == null) {
            return null;
        }
        try {
            bytes = JavaUtils.getBytesFromStream(inputOctetStreamProxy);
        } finally {
            inputOctetStreamProxy.close();
        }
        return bytes;
    }

    
Params:
  • filter – 
/**
     * @param filter
     */
    public void addNodeFilter(NodeFilter filter) {
        if (isOctetStream()) {
            try {
                convertToNodes();
            } catch (Exception e) {
                throw new XMLSecurityRuntimeException(
                    "signature.XMLSignatureInput.nodesetReference", e
                );
            }
        }
        nodeFilters.add(filter);
    }

    
Returns:the node filters
/**
     * @return the node filters
     */
    public List<NodeFilter> getNodeFilters() {
        return nodeFilters;
    }

    
Params:
  • b – 
/**
     * @param b
     */
    public void setNodeSet(boolean b) {
        isNodeSet = b;
    }

    void convertToNodes() throws CanonicalizationException,
        ParserConfigurationException, IOException, SAXException {
        if (dfactory == null) {
            dfactory = DocumentBuilderFactory.newInstance();
            dfactory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, Boolean.TRUE);
            dfactory.setValidating(false);
            dfactory.setNamespaceAware(true);
        }
        DocumentBuilder db = dfactory.newDocumentBuilder();
        // select all nodes, also the comments.
        try {
            db.setErrorHandler(new com.sun.org.apache.xml.internal.security.utils.IgnoreAllErrorHandler());

            Document doc = db.parse(this.getOctetStream());
            this.subNode = doc;
        } catch (SAXException ex) {
            // if a not-wellformed nodeset exists, put a container around it...
            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            baos.write("<container>".getBytes("UTF-8"));
            baos.write(this.getBytes());
            baos.write("</container>".getBytes("UTF-8"));

            byte result[] = baos.toByteArray();
            Document document = db.parse(new ByteArrayInputStream(result));
            this.subNode = document.getDocumentElement().getFirstChild().getFirstChild();
        } finally {
            if (this.inputOctetStreamProxy != null) {
                this.inputOctetStreamProxy.close();
            }
            this.inputOctetStreamProxy = null;
            this.bytes = null;
        }
    }

}