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Commit 38a2d474 authored by Markus Quaritsch's avatar Markus Quaritsch
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Merge pull request #446 in VECTO/vecto-sim from ~EMQUARIMA/vecto-sim:develop to develop 

* commit '375b7d6c':
  formatting
parents f18f0b55 375b7d6c
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VectoCommon/VectoHashing/VectoHash.cs
+ 260
− 260
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......@@ -29,264 +29,264 @@
* Martin Rexeis, rexeis@ivt.tugraz.at, IVT, Graz University of Technology
*/
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Xml;
using System.Xml.Linq;
using TUGraz.VectoCommon.Resources;
using TUGraz.VectoCommon.Utils;
using TUGraz.VectoHashing.Impl;
using TUGraz.VectoHashing.Util;
namespace TUGraz.VectoHashing
{
public class VectoHash : IVectoHash
{
protected XmlDocument Document;
public static VectoHash Load(string filename)
{
var doc = new XmlDocument();
XmlTextReader reader = null;
try {
reader = new XmlTextReader(filename);
doc.Load(reader);
} catch (Exception e) {
throw new Exception("failed to read XML document", e);
} finally {
if (reader != null) {
reader.Close();
}
}
return new VectoHash(doc);
}
public static VectoHash Load(Stream stream)
{
var doc = new XmlDocument();
try {
doc.Load(new XmlTextReader(stream));
} catch (Exception e) {
throw new Exception("failed to read XML document", e);
}
return new VectoHash(doc);
}
public static VectoHash Load(XmlDocument doc)
{
return new VectoHash(doc);
}
protected VectoHash(XmlDocument doc)
{
Document = doc;
}
public IList<VectoComponents> GetContainigComponents()
{
var retVal = new List<VectoComponents>();
foreach (var component in EnumHelper.GetValues<VectoComponents>()) {
var count =
Document.SelectNodes(string.Format("//*[local-name()='{0}']//*[local-name()='{1}']",
XMLNames.VectoInputDeclaration,component.XMLElementName())).Count;
for (var i = 0; i < count; i++) {
retVal.Add(component);
}
}
return retVal;
}
public XElement ComputeXmlHash()
{
var nodes = Document.SelectNodes(GetComponentQueryString());
if (nodes == null || nodes.Count == 0) {
throw new Exception("No component found");
}
var componentId = nodes[0].Attributes[XMLNames.Component_ID_Attr].Value;
var hash = DoComputeHash(nodes[0]);
return hash.ToXDocument().Root;
}
public string ComputeHash()
{
var nodes = Document.SelectNodes(GetComponentQueryString());
if (nodes == null || nodes.Count == 0) {
throw new Exception("No component found");
}
var componentId = nodes[0].Attributes[XMLNames.Component_ID_Attr].Value;
return GetHashValueFromSig(DoComputeHash(nodes[0]), componentId);
}
public string ComputeHash(VectoComponents component, int index = 0)
{
var nodes = Document.SelectNodes(GetComponentQueryString(component));
if (nodes == null || nodes.Count == 0) {
throw new Exception(string.Format("Component {0} not found", component.XMLElementName()));
}
if (index >= nodes.Count) {
throw new Exception(string.Format("index exceeds number of components found! index: {0}, #components: {1}", index,
nodes.Count));
}
var componentId = nodes[index].Attributes[XMLNames.Component_ID_Attr].Value;
return GetHashValueFromSig(DoComputeHash(nodes[index]), componentId);
}
private static XmlDocument DoComputeHash(XmlNode dataNode)
{
var parent = dataNode.ParentNode;
if (parent == null) {
throw new Exception("Invalid structure of input XML!");
}
var newDoc = new XmlDocument();
var node = newDoc.CreateElement("Dummy");
newDoc.AppendChild(node);
var newNode = newDoc.ImportNode(parent, true);
node.AppendChild(newNode);
var componentId = dataNode.Attributes[XMLNames.Component_ID_Attr].Value;
return XMLHashProvider.ComputeHash(newDoc, componentId);
}
public XDocument AddHash()
{
if (Document.DocumentElement == null) {
throw new Exception("invalid input document");
}
IList<VectoComponents> components;
if (Document.DocumentElement.LocalName.Equals(XMLNames.VectoInputDeclaration)) {
components = GetContainigComponents();
if (components.Contains(VectoComponents.Vehicle)) {
throw new Exception("adding hash for Vehicle is not supported");
}
if (components.Count > 1) {
throw new Exception("input must not contain multiple components!");
}
if (components.Count == 0) {
throw new Exception("input does not contain a known component!");
}
} else if (Document.DocumentElement.LocalName.Equals("VectoOutput")) {
components = new List<VectoComponents>() { VectoComponents.VectoOutput };
} else if (Document.DocumentElement.LocalName.Equals("VectoCustomerInformation")) {
components = new List<VectoComponents>() { VectoComponents.VectoCustomerInformation };
}else {
throw new Exception("unknown document structure! neither input data nor output data format");
}
var query = string.Format("//*[local-name()='{0}']/*[local-name()='Data']", components[0].XMLElementName());
var node = Document.SelectSingleNode(query);
if (node == null) {
throw new Exception(string.Format("'Data' element for component '{0}' not found!", components[0].XMLElementName()));
}
query = string.Format("//*[local-name()='{0}']/*[local-name()='Signature']", components[0].XMLElementName());
var sigNodes = Document.SelectNodes(query);
if (sigNodes != null && sigNodes.Count > 0) {
throw new Exception("input data already contains a signature element");
}
var attributes = node.Attributes;
var id = components[0].HashIdPrefix() + Guid.NewGuid().ToString("n").Substring(0, 20);
var idSet = false;
if (attributes != null && attributes[XMLNames.Component_ID_Attr] != null) {
attributes[XMLNames.Component_ID_Attr].Value = id;
idSet = true;
}
if (!idSet) {
var attr = Document.CreateAttribute(XMLNames.Component_ID_Attr);
attr.Value = id;
if (node.Attributes == null) {
throw new Exception("failed to add 'id' attribute");
}
node.Attributes.Append(attr);
}
var hash = XMLHashProvider.ComputeHash(Document, id);
var sig = Document.CreateElement(XMLNames.DI_Signature, node.NamespaceURI);
if (node.ParentNode == null || hash.DocumentElement == null) {
throw new Exception("Invalid format of document and/or created hash");
}
sig.AppendChild(Document.ImportNode(hash.DocumentElement, true));
node.ParentNode.AppendChild(sig);
return Document.ToXDocument();
}
public string ReadHash()
{
var nodes = Document.SelectNodes(GetComponentQueryString());
if (nodes == null || nodes.Count == 0) {
throw new Exception("No component found");
}
return ReadHashValue(nodes[0]);
}
public string ReadHash(VectoComponents component, int index = 0)
{
var nodes = Document.SelectNodes(GetComponentQueryString(component));
if (nodes == null || nodes.Count == 0) {
throw new Exception(string.Format("Component {0} not found", component.XMLElementName()));
}
if (index >= nodes.Count) {
throw new Exception(string.Format("index exceeds number of components found! index: {0}, #components: {1}", index,
nodes.Count));
}
return ReadHashValue(nodes[index]);
}
public bool ValidateHash()
{
return ReadHash().Equals(ComputeHash(), StringComparison.Ordinal);
}
public bool ValidateHash(VectoComponents component, int index = 0)
{
return StructuralComparisons.StructuralEqualityComparer.Equals(ReadHash(component, index),
ComputeHash(component, index));
}
private static string GetComponentQueryString(VectoComponents? component = null)
{
if (component == null) {
return "(//*[@id])[1]";
}
return component == VectoComponents.Vehicle
? string.Format("//*[local-name()='{0}']", component.Value.XMLElementName())
: string.Format("//*[local-name()='{0}']/*[local-name()='Data']", component.Value.XMLElementName());
}
private static string GetHashValueFromSig(XmlDocument hashed, string elementId)
{
var nodes = hashed.SelectNodes("//*[@URI='#" + elementId + "']/*[local-name() = 'DigestValue']");
if (nodes == null || nodes.Count == 0) {
return null;
}
if (nodes.Count > 1) {
throw new Exception("Multiple DigestValue elements found!");
}
return nodes[0].InnerText;
}
private static string ReadHashValue(XmlNode dataNode)
{
var parent = dataNode.ParentNode;
if (parent == null) {
throw new Exception("Invalid structure of input XML!");
}
var elementToHash = dataNode.Attributes[XMLNames.Component_ID_Attr].Value;
var nodes = parent.SelectNodes(".//*[@URI='#" + elementToHash + "']/*[local-name() = 'DigestValue']");
if (nodes == null || nodes.Count == 0) {
return null;
}
if (nodes.Count > 1) {
throw new Exception("Multiple DigestValue elements found!");
}
return nodes[0].InnerText;
}
}
using System;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Xml;
using System.Xml.Linq;
using TUGraz.VectoCommon.Resources;
using TUGraz.VectoCommon.Utils;
using TUGraz.VectoHashing.Impl;
using TUGraz.VectoHashing.Util;
namespace TUGraz.VectoHashing
{
public class VectoHash : IVectoHash
{
protected XmlDocument Document;
public static VectoHash Load(string filename)
{
var doc = new XmlDocument();
XmlTextReader reader = null;
try {
reader = new XmlTextReader(filename);
doc.Load(reader);
} catch (Exception e) {
throw new Exception("failed to read XML document", e);
} finally {
if (reader != null) {
reader.Close();
}
}
return new VectoHash(doc);
}
public static VectoHash Load(Stream stream)
{
var doc = new XmlDocument();
try {
doc.Load(new XmlTextReader(stream));
} catch (Exception e) {
throw new Exception("failed to read XML document", e);
}
return new VectoHash(doc);
}
public static VectoHash Load(XmlDocument doc)
{
return new VectoHash(doc);
}
protected VectoHash(XmlDocument doc)
{
Document = doc;
}
public IList<VectoComponents> GetContainigComponents()
{
var retVal = new List<VectoComponents>();
foreach (var component in EnumHelper.GetValues<VectoComponents>()) {
var count =
Document.SelectNodes(string.Format("//*[local-name()='{0}']//*[local-name()='{1}']",
XMLNames.VectoInputDeclaration, component.XMLElementName())).Count;
for (var i = 0; i < count; i++) {
retVal.Add(component);
}
}
return retVal;
}
public XElement ComputeXmlHash()
{
var nodes = Document.SelectNodes(GetComponentQueryString());
if (nodes == null || nodes.Count == 0) {
throw new Exception("No component found");
}
var componentId = nodes[0].Attributes[XMLNames.Component_ID_Attr].Value;
var hash = DoComputeHash(nodes[0]);
return hash.ToXDocument().Root;
}
public string ComputeHash()
{
var nodes = Document.SelectNodes(GetComponentQueryString());
if (nodes == null || nodes.Count == 0) {
throw new Exception("No component found");
}
var componentId = nodes[0].Attributes[XMLNames.Component_ID_Attr].Value;
return GetHashValueFromSig(DoComputeHash(nodes[0]), componentId);
}
public string ComputeHash(VectoComponents component, int index = 0)
{
var nodes = Document.SelectNodes(GetComponentQueryString(component));
if (nodes == null || nodes.Count == 0) {
throw new Exception(string.Format("Component {0} not found", component.XMLElementName()));
}
if (index >= nodes.Count) {
throw new Exception(string.Format("index exceeds number of components found! index: {0}, #components: {1}", index,
nodes.Count));
}
var componentId = nodes[index].Attributes[XMLNames.Component_ID_Attr].Value;
return GetHashValueFromSig(DoComputeHash(nodes[index]), componentId);
}
private static XmlDocument DoComputeHash(XmlNode dataNode)
{
var parent = dataNode.ParentNode;
if (parent == null) {
throw new Exception("Invalid structure of input XML!");
}
var newDoc = new XmlDocument();
var node = newDoc.CreateElement("Dummy");
newDoc.AppendChild(node);
var newNode = newDoc.ImportNode(parent, true);
node.AppendChild(newNode);
var componentId = dataNode.Attributes[XMLNames.Component_ID_Attr].Value;
return XMLHashProvider.ComputeHash(newDoc, componentId);
}
public XDocument AddHash()
{
if (Document.DocumentElement == null) {
throw new Exception("invalid input document");
}
IList<VectoComponents> components;
if (Document.DocumentElement.LocalName.Equals(XMLNames.VectoInputDeclaration)) {
components = GetContainigComponents();
if (components.Contains(VectoComponents.Vehicle)) {
throw new Exception("adding hash for Vehicle is not supported");
}
if (components.Count > 1) {
throw new Exception("input must not contain multiple components!");
}
if (components.Count == 0) {
throw new Exception("input does not contain a known component!");
}
} else if (Document.DocumentElement.LocalName.Equals("VectoOutput")) {
components = new List<VectoComponents>() { VectoComponents.VectoOutput };
} else if (Document.DocumentElement.LocalName.Equals("VectoCustomerInformation")) {
components = new List<VectoComponents>() { VectoComponents.VectoCustomerInformation };
} else {
throw new Exception("unknown document structure! neither input data nor output data format");
}
var query = string.Format("//*[local-name()='{0}']/*[local-name()='Data']", components[0].XMLElementName());
var node = Document.SelectSingleNode(query);
if (node == null) {
throw new Exception(string.Format("'Data' element for component '{0}' not found!", components[0].XMLElementName()));
}
query = string.Format("//*[local-name()='{0}']/*[local-name()='Signature']", components[0].XMLElementName());
var sigNodes = Document.SelectNodes(query);
if (sigNodes != null && sigNodes.Count > 0) {
throw new Exception("input data already contains a signature element");
}
var attributes = node.Attributes;
var id = components[0].HashIdPrefix() + Guid.NewGuid().ToString("n").Substring(0, 20);
var idSet = false;
if (attributes != null && attributes[XMLNames.Component_ID_Attr] != null) {
attributes[XMLNames.Component_ID_Attr].Value = id;
idSet = true;
}
if (!idSet) {
var attr = Document.CreateAttribute(XMLNames.Component_ID_Attr);
attr.Value = id;
if (node.Attributes == null) {
throw new Exception("failed to add 'id' attribute");
}
node.Attributes.Append(attr);
}
var hash = XMLHashProvider.ComputeHash(Document, id);
var sig = Document.CreateElement(XMLNames.DI_Signature, node.NamespaceURI);
if (node.ParentNode == null || hash.DocumentElement == null) {
throw new Exception("Invalid format of document and/or created hash");
}
sig.AppendChild(Document.ImportNode(hash.DocumentElement, true));
node.ParentNode.AppendChild(sig);
return Document.ToXDocument();
}
public string ReadHash()
{
var nodes = Document.SelectNodes(GetComponentQueryString());
if (nodes == null || nodes.Count == 0) {
throw new Exception("No component found");
}
return ReadHashValue(nodes[0]);
}
public string ReadHash(VectoComponents component, int index = 0)
{
var nodes = Document.SelectNodes(GetComponentQueryString(component));
if (nodes == null || nodes.Count == 0) {
throw new Exception(string.Format("Component {0} not found", component.XMLElementName()));
}
if (index >= nodes.Count) {
throw new Exception(string.Format("index exceeds number of components found! index: {0}, #components: {1}", index,
nodes.Count));
}
return ReadHashValue(nodes[index]);
}
public bool ValidateHash()
{
return ReadHash().Equals(ComputeHash(), StringComparison.Ordinal);
}
public bool ValidateHash(VectoComponents component, int index = 0)
{
return StructuralComparisons.StructuralEqualityComparer.Equals(ReadHash(component, index),
ComputeHash(component, index));
}
private static string GetComponentQueryString(VectoComponents? component = null)
{
if (component == null) {
return "(//*[@id])[1]";
}
return component == VectoComponents.Vehicle
? string.Format("//*[local-name()='{0}']", component.Value.XMLElementName())
: string.Format("//*[local-name()='{0}']/*[local-name()='Data']", component.Value.XMLElementName());
}
private static string GetHashValueFromSig(XmlDocument hashed, string elementId)
{
var nodes = hashed.SelectNodes("//*[@URI='#" + elementId + "']/*[local-name() = 'DigestValue']");
if (nodes == null || nodes.Count == 0) {
return null;
}
if (nodes.Count > 1) {
throw new Exception("Multiple DigestValue elements found!");
}
return nodes[0].InnerText;
}
private static string ReadHashValue(XmlNode dataNode)
{
var parent = dataNode.ParentNode;
if (parent == null) {
throw new Exception("Invalid structure of input XML!");
}
var elementToHash = dataNode.Attributes[XMLNames.Component_ID_Attr].Value;
var nodes = parent.SelectNodes(".//*[@URI='#" + elementToHash + "']/*[local-name() = 'DigestValue']");
if (nodes == null || nodes.Count == 0) {
return null;
}
if (nodes.Count > 1) {
throw new Exception("Multiple DigestValue elements found!");
}
return nodes[0].InnerText;
}
}
}
\ No newline at end of file
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