Develop Reference

How to get hash from XML for signing in java

I have to create an application which has XML data and creates Hash for signing and send the hash to an API to get the raw signature for XML and append signature for XML in Java How can I achieve this.
The same thing can be done in .Net by overriding SignedXml class like this
public class CustomSignedXml: SignedXml
{
public CustomSignedXml(XmlDocument xmlDoc) : base(xmlDoc)
{
}
public void ComputeSignature()
{
CryptoConfig.AddAlgorithm(typeof(RSAPKCS1SHA256SignatureDescription), "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256");
MethodInfo methodInfo = typeof(SignedXml).GetMethod("BuildDigestedReferences", BindingFlags.Instance | BindingFlags.NonPublic);
methodInfo.Invoke(this, null);
SignedInfo.SignatureMethod = "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256";
SignatureDescription signatureDescription = CryptoConfig.CreateFromName(SignedInfo.SignatureMethod) as SignatureDescription;
if (signatureDescription == null)
throw new CryptographicException("Cryptography_Xml_SignatureDescriptionNotCreated");
HashAlgorithm hashAlg = signatureDescription.CreateDigest();
if (hashAlg == null)
throw new CryptographicException("Cryptography_Xml_CreateHashAlgorithmFailed");
MethodInfo methodInfo2 = typeof(SignedXml).GetMethod("GetC14NDigest", BindingFlags.Instance | BindingFlags.NonPublic);
byte[] hashvalue = (byte[])methodInfo2.Invoke(this, new object[] { hashAlg });
var signature = GetSignatureFromServer(hashvalue);
m_signature.SignatureValue = signature;
}
}
And use CustomSignedXml class to sign using following meathod
public string GetSignedXml(string xmlDoc, X509Certificate2 PublicCertificate)
{
try
{
XmlDocument xmlDocumentToSign = new XmlDocument();
xmlDocumentToSign.LoadXml(xmlDoc);
CustomSignedXml signedXml = new CustomSignedXml(xmlDocumentToSign);
Reference reference = new Reference();
reference.Uri = "";
reference.AddTransform(new XmlDsigEnvelopedSignatureTransform());
reference.AddTransform(new XmlDsigExcC14NTransform());
reference.DigestMethod = "http://www.w3.org/2001/04/xmlenc#sha256";
signedXml.AddReference(reference);
signedXml.ComputeSignature();
KeyInfo keyInfo = new KeyInfo();
keyInfo.AddClause(GetKeyInfoData(PublicCertificate));
signedXml.KeyInfo = keyInfo;
var xmlDigitalSignature = signedXml.GetXml();
xmlDocumentToSign.DocumentElement.AppendChild(xmlDocumentToSign.ImportNode(xmlDigitalSignature, true));
return xmlDocumentToSign.OuterXml;
}
catch (Exception)
{
throw;
}
}
How can I do the same in JAVA

How to Print String object Line by Line

I have the following code to convert text file to xml.:-
**
public static void main (String args[]) {
new ToXML().doit();
}
public void doit () {
try{
in = new BufferedReader(new FileReader("D:/sample.txt"));
out = new StreamResult("D:/data.xml");
initXML();
String str;
while ((str = in.readLine()) != null)
{
process(str);
}
in.close();
writeXML();
}
catch (Exception e) { e.printStackTrace(); }
}
public void initXML() throws ParserConfigurationException{
DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = factory.newDocumentBuilder();
DOMImplementation impl = builder.getDOMImplementation();
xmldoc = impl.createDocument(null, "AIRLINE_INFO", null);
root = xmldoc.getDocumentElement();
}
public void process(String s) {
String elements = s;
Element e1 = xmldoc.createElement("Supplier_Name");
Node n1 = xmldoc.createTextNode(elements);
e1.appendChild(n1);
Element e2 = xmldoc.createElement("E-Mail_Address");
Node n2 = xmldoc.createTextNode(elements);
e2.appendChild(n2);
e0.appendChild(e1);
e0.appendChild(e2);
root.appendChild(e0);
}
public void writeXML() throws TransformerConfigurationException,
TransformerException {
DOMSource domSource = new DOMSource(xmldoc);
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.METHOD, "xml");
transformer.setOutputProperty(OutputKeys.ENCODING,"ISO-8859-1");
transformer.setOutputProperty
("{http://xml.apache.org/xslt}indent-amount", "4");
transformer.setOutputProperty(OutputKeys.INDENT, "yes");
transformer.transform(domSource, out);
}
}
**
The output which is Expected is:
**
<AIRLINE_INFO>
<AIRTICKET>
<Supplier_Name>SpiceJet Ltd, 319, Udyog Vihar, Phase IV, Gurgaon - 122016 Haryana, India</Supplier_Name>
<E-Mail_Address>E-Mail: custrelations#spicejet.com</E-Mail_Address>
</AIRTICKET>
</AIRLINE_INFO>
**
But Currently While Excuting the code i am getting the following output
**
<AIRLINE_INFO>
<AIRTICKET>
<Supplier_Name>SpiceJet Ltd, 319, Udyog Vihar, Phase IV, Gurgaon - 122016 Haryana, India</Supplier_Name>
<E-Mail_Address>SpiceJet Ltd, 319, Udyog Vihar, Phase IV, Gurgaon - 122016 Haryana, India</E-Mail_Address>
</AIRTICKET>
<AIRTICKET>
<Supplier_Name>E-Mail: custrelations#spicejet.com</Supplier_Name>
<E-Mail_Address>E-Mail: custrelations#spicejet.com</E-Mail_Address>
</AIRTICKET>
</AIRLINE_INFO>
**
Please help how can i break the object in order to achieve the Expected output.

You use two times the same string for the text nodes here:
String elements = s;
Element e1 = xmldoc.createElement("Supplier_Name");
Node n1 = xmldoc.createTextNode(elements);
e1.appendChild(n1);
Element e2 = xmldoc.createElement("E-Mail_Address");
Node n2 = xmldoc.createTextNode(elements);
e2.appendChild(n2);
To fix that, you need to read two lines, and then create one air ticket node with that information.

doc.createElement() forgot the opening "<"

I was working on a Java Application and I have to map lots of data then generate an XML output.
All the output Looks good, except this 1 random element. As you can see in the image below all the "Value" tags look good, except the 1 highlighted.
http://i.stack.imgur.com/3TgIG.png
Code used to generate XML:
private void generateXML() {
try {
DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
doc = docBuilder.newDocument();
//Add Root Element
Element rootElement = doc.createElement("Request");
rootElement.setAttribute("request_id", requestID);
doc.appendChild(rootElement);
//Add Experiment Element
Element experimentElement = doc.createElement("Experiment");
experimentElement.setAttribute("name", mappedData.getFileName()); //Change to experiment name
experimentElement.setAttribute("insert_method", "Insert");
experimentElement.setAttribute("notebook", "BioELN");
experimentElement.setAttribute("researcher", webFormPostData.get("Researchers")[0]);
experimentElement.setAttribute("project", getExcelTypeData.get("project"));
experimentElement.setAttribute("comments", webFormPostData.get("comments")[0]);
experimentElement.setAttribute("expt_date", getCurrentDate());
experimentElement.setAttribute("protocol_name", getExcelTypeData.get("protocolName"));
experimentElement.setAttribute("protocol_version", getExcelTypeData.get("protocolVersion"));
rootElement.appendChild(experimentElement);
//Add Data to Experiment
List<Element> experimentDataElements = generateExperimentDataElements();
for(Element dataElement : experimentDataElements) {
experimentElement.appendChild(dataElement);
}
Element attachmentElement = doc.createElement("Attachment");
attachmentElement.setAttribute("filename", mappedData.getFilePath());
experimentElement.appendChild(attachmentElement);
} catch(Exception e) {
logger.log("Error: " + e);
e.printStackTrace();
}
}
private List<Element> generateExperimentDataElements() {
//Loop through output_mapping mapped data and see if values are found in the mappedData.getMappedData();
List<Element> dataElements = new ArrayList<Element>();
for(int i=0; i < mappedData.getMappedData().size(); i++) { //Cycle Through all Mapped Data Rows
for(Map.Entry<String, Map<String, String>> entry : outputMappedFields.entrySet()) { //Get Required Fields
Element itemElement, valueElement, dataElement;
String mappedVarName = entry.getKey();
String vName = entry.getValue().get("variableName");
String variableType = entry.getValue().get("variableType");
itemElement = doc.createElement("VGItem");
itemElement.setAttribute("row_id", String.valueOf(i+1));
itemElement.setAttribute("table_name", "Results");
itemElement.setAttribute("variable_name", vName);
itemElement.setAttribute("parent_table_name", "Plate");
itemElement.setAttribute("parent_row_id", "plate");
valueElement = doc.createElement("Value");
dataElement = doc.createElement(variableType+"_value");
if(mappedData.getMappedData().get(i).containsKey(mappedVarName)) {
dataElement.setTextContent(mappedData.getMappedData().get(i).get(mappedVarName)); //Get field from Mapped Data
}
valueElement.appendChild(dataElement);
itemElement.appendChild(valueElement);
dataElements.add(itemElement);
}
}
return dataElements;
}
#Override
public String toString() {
try {
TransformerFactory tf = TransformerFactory.newInstance();
Transformer transformer = tf.newTransformer();
transformer.setOutputProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
StringWriter writer = new StringWriter();
transformer.transform(new DOMSource(doc), new StreamResult(writer));
String output = "<?xml version=\"1.0\" encoding=\"UTF-8\"?>" + writer.getBuffer().toString().replaceAll("\n|\r", "");
return output;
} catch (Exception e) {
e.printStackTrace();
}
return "";
}
XML FILE: http://paste.strictfp.com/38339

Reading and writing an xml in java

I am reading an XML file using Stax parser and writing it using DOM in java. I am not getting desired XML output. I read following XML file
<config>
<Sensor1>
<name>abc</name>
<range>100</range>
</Sensor1>
<sensor2>
<name>xyz</name>
<range>100</range>
</sensor2>
</config>
I parse the above XML file using Stax parser as follows
public void readConfig(String configFile) {
boolean sensor1 = false;
boolean sensor2 = false;
try
{
XMLInputFactory inputFactory = XMLInputFactory.newInstance();
InputStream in = new FileInputStream(configFile);
XMLEventReader eventReader = inputFactory.createXMLEventReader(in);
// Read the XML document
while (eventReader.hasNext()) {
XMLEvent event = eventReader.nextEvent();
if (event.isStartElement()) {
StartElement startElement = event.asStartElement();
if (startElement.getName().getLocalPart() == (sensor1)) {
sensor1 = true;
Sensor1 Obj1 = new Sensor1();
}
if (startElement.getName().getLocalPart() == (sensor2)) {
sensor2 = true;
Sensor2 Obj2 = new Sensor2();
}
if (sensor1) {
if (event.asStartElement().getName().getLocalPart().equals(name)) {
event = eventReader.nextEvent();
Obj1.set_Sensor_Name(event.asCharacters().getData());
continue;
}
if (event.asStartElement().getName().getLocalPart().equals(range)) {
event = eventReader.nextEvent();
Obj1.set_Sensor_Range(event.asCharacters().getData());
continue;
}
}
if (sensor2) {
if (event.asStartElement().getName().getLocalPart().equals(name)) {
event = eventReader.nextEvent();
Obj2.set_Sensor_Name(event.asCharacters().getData());
continue;
}
if (event.asStartElement().getName().getLocalPart().equals(range)) {
event = eventReader.nextEvent();
Obj1.set_Sensor_Range(event.asCharacters().getData());
continue;
}
}
if (event.isEndElement()) {
EndElement endElement = event.asEndElement();
if (endElement.getName().getLocalPart() == (sensor1)) {
sensor1.addToArray();
}
if (endElement.getName().getLocalPart() == (sensor2)) {
sensor2.addToArray();
}
}
}
In "Sensor1" and "Sensor2" class I am adding extra information depending on some condition.
class Sensor1 {
public ArrayList<Object> list = new ArrayList<Object>();
String name;
double range;
public void set_Sensor_Name(String name) {
this.name = name;
}
public void set_Sensor_Range(double range) {
this.range = range;
}
public void addToArray(){
double distance =50;
if(distance<range){
list.add("TITANIC");
list.add(123456);
}
WriteFile fileObj = new WriteFile();
fileObj.writeXMlFile(list);
}
}
This is the class to write the XML
public class WriteFile {
public void writeXmlFile(ArrayList<Object> list) {
try {
DocumentBuilderFactory dFact = DocumentBuilderFactory.newInstance();
DocumentBuilder build = dFact.newDocumentBuilder();
Document doc = build.newDocument();
Element root = doc.createElement("SensorTracks");
doc.appendChild(root);
Element sensorInfo = doc.createElement("SensorDetails");
root.appendChild(sensorInfo);
Element vesselInfo = doc.createElement("VesselDetails");
root.appendChild(vesselInfo);
for(int i=0; i<list.size(); i +=4 ) {
Element name = doc.createElement("SensorName");
name.appendChild(doc.createTextNode(String.valueOf(list.get(i))));
sensorInfo.appendChild(name);
Element range = doc.createElement("SensorRange");
name.appendChild(doc.createTextNode(String.valueOf(list.get(i+1))));
sensorInfo.appendChild(range);
Element mmi = doc.createElement("shipname");
mmi.appendChild(doc.createTextNode(String.valueOf(list.get(i+2))));
vesselInfo.appendChild(mmi);
Element license = doc.createElement("license");
license.appendChild(doc.createTextNode(String.valueOf(list.get(i+3))));
vesselInfo.appendChild(license);
}
// Save the document to the disk file
TransformerFactory tranFactory = TransformerFactory.newInstance();
Transformer aTransformer = tranFactory.newTransformer();
// format the XML nicely
aTransformer.setOutputProperty(OutputKeys.ENCODING, "ISO-8859-1");
aTransformer.setOutputProperty(
"{http://xml.apache.org/xslt}indent-amount", "4");
aTransformer.setOutputProperty(OutputKeys.INDENT, "yes");
DOMSource source = new DOMSource(doc);
try {
FileWriter fos = new FileWriter("/home/ros.xml");
StreamResult result = new StreamResult(fos);
aTransformer.transform(source, result);
} catch (IOException e) {
e.printStackTrace();
}
} catch (TransformerException ex) {
System.out.println("Error outputting document");
} catch (ParserConfigurationException ex) {
System.out.println("Error building document");
}
When I execute, I get following XML
<SensorTracks>
<sensorDetails>
<SensorName>xyz</SensorName>
<SensorRange>100</SensorRange>
</sensorDetails>
<VesselDetails>
<shipname>TITANIC</shipname>
<license>123456</license>
</vesselDetails>
MY FINAL OUTPUT MUST BE
<config>
<SensorTracks>
<sensorDetails>
<SensorName>xyz</SensorName>
<SensorRange>100</SensorRange>
<SensorName>abc</SensorName>
<SensorRange>100</SensorRange>
</sensorDetails>
<VesselDetails>
<shipname>TITANIC</shipname>
<license>123456</license>
</vesselDetails>
What wrong thing I am I doing in my code ?? Any help is appreciated. Thanks in advance

I am answering my own question again. The problem is very simple. To get the desired output as mention above. just make the following changes to "WriteFile" class.
FileWriter fos = new FileWriter("/home/ros.xml" ,true);
Finally, I am learning Java :)

Frankly speaking the example looks cumbersome. Do you consider to use apache digester of jaxb?
http://commons.apache.org/digester/
http://www.oracle.com/technetwork/articles/javase/index-140168.html

xml parsing+Java ME

I am editing my qestion to make clear idea about the string name resfile_name and result
I want to do xml parsing.where i am passing some parameter to url ane it gives me responce in xml format which i take it in string name result now i want to parse that string(xml data).
i am using the follwing below code:-
SAXParserFactory factory = SAXParserFactory.newInstance();
SAXParser saxParser = factory.newSAXParser();
vector = new Vector();
vector.addElement(new KeyPair("ParentID", "10000186"));
String result = Constants.callSoap("GetChildList", vector);
InputStream is = new ByteArrayInputStream(result.getBytes("UTF-8"));
Reader reader = new InputStreamReader(in);
XmlParser parser = new XmlParser(reader);
ParseEvent pe = null;
Reader reader = new InputStreamReader(in);
XmlParser parser = new XmlParser(reader);
ParseEvent pe = null;
parser.skip();
parser.read(Xml.START_TAG, null, "GetChildListResult");
parser.skip();
parser.read(Xml.START_TAG, null, "CustomChildList");
boolean trucking = true;
boolean first = true;
while (trucking) {
pe = parser.read();
if (pe.getType() == Xml.START_TAG) {
String name = pe.getName();
System.out.println("nAME=="+name);
if (name.equals("ChildID")) {
String title, link, description;
title = link = description = null;
while ((pe.getType() != Xml.END_TAG) ||
(pe.getName().equals(name) == false)) {
pe = parser.read();
if (pe.getType() == Xml.START_TAG &&
pe.getName().equals("ChildName")) {
pe = parser.read();
title = pe.getText();
}
else if (pe.getType() == Xml.START_TAG &&
pe.getName().equals("IMEINumber")) {
pe = parser.read();
link = pe.getText();
}
else if (pe.getType() == Xml.START_TAG &&
pe.getName().equals("ChildStatus")) {
pe = parser.read();
description = pe.getText();
}
}
}
else {
while ((pe.getType() != Xml.END_TAG) ||
(pe.getName().equals(name) == false))
pe = parser.read();
}
}
if (pe.getType() == Xml.END_TAG &&
pe.getName().equals("GetChildListResult"))
trucking = false;
}
the Constants.callSoap("GetChildList", vector); calls the callsoap method in constants which has code:--
public static String callSoap(String method, Vector vector) {
String result = null;
Constants.log("callSoap");
try {
SoapObject request = new SoapObject(NAMESPACE, method);
if (vector != null) {
for (int i = 0; i < vector.size(); i++) {
KeyPair keyPair = (KeyPair) vector.elementAt(i);
request.addProperty(keyPair.getKey(), keyPair.getValue());
}
}
Constants.log("callSoap2");
Element[] header = new Element[1];
header[0] = new Element().createElement(NAMESPACE, "AuthSoapHd");
Element username = new Element().createElement(NAMESPACE, "strUserName");
username.addChild(Node.TEXT, "*****");
header[0].addChild(Node.ELEMENT, username);
Element password = new Element().createElement(NAMESPACE, "strPassword");
password.addChild(Node.TEXT, "******");
header[0].addChild(Node.ELEMENT, password);
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.dotNet = true;
envelope.headerOut = header;
envelope.setOutputSoapObject(request);
Constants.log("callSoap3");
HttpTransport transport = new HttpTransport("http://***.***.*.***/ChildTrackerService/ChildTrackerService.asmx?wsdl");
//log("Log:transport");
transport.setXmlVersionTag("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
//log("Log:transport1");
try {
transport.call("http://tempuri.org/" + method, envelope);
//log("Log:transport:call");
result = (envelope.getResponse()).toString();
} catch (Exception e) {
System.out.println("exception of IP==" + e);
}
} catch (Exception e) {
log("Exception CallSoap:" + e.toString());
}
return result;
}
And the class keypair contain:-
public KeyPair(String key, String value) {
this.key = key;
this.value = value;
}
public String getKey() {
return key;
}
public String getValue() {
return value;
}
The string reult has --
result==anyType{CustomChildList=anyType{ChildID=452; ChildName=Local; IMEINumber=958694; ChildStatus=Free; ExpiryDate=2011-05-26T16:22:21.29; RemainigDays=1; SOS=1; }; CustomChildList=anyType{ChildID=502; ChildName=testing; IMEINumber=123456; ChildStatus=anyType{}; ExpiryDate=null; RemainigDays=0; SOS=1; }; CustomChildList=anyType{ChildID=523; ChildName=abc; IMEINumber=124124; ChildStatus=anyType{}; ExpiryDate=null; RemainigDays=0; SOS=1; }; }
the actual response is like this:--
452
Local
958694
Free
2011-05-26T16:22:21.29
1
1
502
testing
123456
0
1
523
abc
124124
0
1

Following code will look for resources in classpath with the name passed in argument and you are passing whole XML so NPE is obvious.
this.getClass().getResourceAsStream(resfile_name)
You better get the inputStream from URL , as shown in below broken snippet and move ahead
HttpConnection hc = null;
try {
hc = (HttpConnection)Connector.open(url);
parse(hc.openInputStream());
See
Parsing XML in java-me