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vor 1 Jahr, 6 Monaten
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Beteiligte Autoren:
Ola, Allard, DerekM-2, Ruben Sanchez Peña, Irving

[WD19] How to build and sign an XML file?

Startbeitrag von Ola am 07.03.2016 09:40

Hi all,

I need to build and sign an XML file called Application Request and finally sending it to a bank using a webservice called CorporateFileService. This goes beyond my procedurally thinking brains, so I need help from xml/ws specialists to get started.

The necessary schema, certificate and WSDL files are available here:

Aditional documents are here:

And the detailed message descriptions (in English, despite the link text's language) are here:

To start with, I need to build an "ApplicationRequest" XML file like below, where ... (3 dots) dots indicates that a portion of the string has been cut away. I have all the data prepared, the content base 64 -coded and the certificate containing the provate key in a separate file, I just need to know how to insert them into an xml file like this:
(Note: have been replaced with [] to keep it readable, the smiley has replaced character pair ":" + "p")

[?xml version="1.0" encoding="UTF-8"?]
[ApplicationRequest xmlns="http://bxd.fi/xmldata/";]
[Content]PD94bWwgdmVy ... dW1lbnQ+[/Content]
[Signature xmlns="http://www.w3.org/2000/09/xmldsig#";]
[CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315#WithComments"/]
[SignatureMethod Algorithm="http://www.w3.org/2000/09/xmldsig#rsa-sha1"/]
[Reference URI=""]
[Transform Algorithm="http://www.w3.org/2000/09/xmldsig#enveloped-signature"/]
[DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/]
[SignatureValue]fOJ3EwA ... 4Kd0o=[/SignatureValue]
[X509Certificate]MIID+jCCAuKg ... BPkZp8OKo=[/X509Certificate]
[X509IssuerName],CN=Nordea role-certificates CA 01,O=Nordea Bank AB (publ),C=SE[/X509IssuerName]

The schema looks like this (middle part cut away):

[?xml version="1.0" encoding="UTF-8"?]
[!-- edited with XMLSpy v2009 (http://www.altova.com) by Petri Luoto (Nordea) --]
[xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; xmlns:bxd="http://bxd.fi/xmldata/"; xmlns:ds="http://www.w3.org/2000/09/xmldsig#"; targetNamespace="http://bxd.fi/xmldata/"; elementFormDefault="qualified" attributeFormDefault="unqualified"]
[xs:import namespace="http://www.w3.org/2000/09/xmldsig#"; schemaLocation="xmldsig-core-schema.xsd"/]
[xs:element name="ApplicationRequest"]
[xs:documentation]Wrapper for data. Used for transmitting data. Can be XML Digital Signed.[/xs:documentation]
[xs:element name="CustomerId" nillable="false"]
[xs:restriction base="xs:string"]
[xs:minLength value="1"/]
[xs:maxLength value="16"/]
[xs:element name="Command" nillable="false" minOccurs="0"]
[xs:restriction base="xs:string"]
[xs:maxLength value="32"/]
[xs:minLength value="1"/]
[xs:element name="Timestamp" type="xs:dateTime"/]
... (here many elements have been cut away) ...
[xs:element name="Content" type="xs:base64Binary" nillable="true" minOccurs="0"/]
[xs:element ref="ds:Signature" minOccurs="0"/]
[xs:simpleType name="EnvironmentCode"]
[xs:documentation]Production or Test[/xs:documentation]
[xs:restriction base="xs:NMTOKEN"]
[xs:pattern value="(PRODUCTION|TEST)"/]

So how do I code this?
I suppose I need to start with something like this:

xAppReq is xmlDocument [description="ApplicationRequest"]
xNode is xmlNode //Or dynamic?!?!?

How to continue?

Best regards

P.S. Fixed "smiled" character pair to ":" + "p" :-).
Added [?xml version="1.0" encoding="UTF-8"?] to Application request's beginning.


Hi again,

I think I got over the first treshold, and my code now looks like this:

xAppReq is xmlDocument
xNode is xmlNode

xNode..Name = "ApplicationRequest" //But how to add the attribute
//to this first node?

xAppReq.ApplicationRequest[1].CustomerId = wCustomerId
xAppReq.ApplicationRequest[1].Timestamp = wTimeStamp
xAppReq.ApplicationRequest[1].Environment = wEnvironment
xAppReq.ApplicationRequest[1].TargetId = wTargetId
xAppReq.ApplicationRequest[1].Compression = "false"
xAppReq.ApplicationRequest[1].AmountTotal = C_Sum
xAppReq.ApplicationRequest[1].TransactionCount = C_Counter
xAppReq.ApplicationRequest[1].SoftwareId = wSoftwareId
xAppReq.ApplicationRequest[1].FileType = "pain.001.001.02"
xAppReq.ApplicationRequest[1].Content = XFileInString64

...and next the signature. Any hints on it?
Am I on the right track?

best regards

von Ola - am 07.03.2016 22:20

I used the namespace for the ubl stuff ( xml invoicing )

Maybe this helps:

sPath_Pdf is string
sPath is string
xmlfact is xmlDocument ,description="UBL-Invoice"
//xmlfact = XMLOpen("UBL-Invoice.xml")
xmlfact..Encoding = "UTF-8"
nNamespace1 is xmlNamespace
nNamespace2 is xmlNamespace
nNamespace3 is xmlNamespace
nNamespace4 is xmlNamespace
nNode is dynamic xmlNode
nNode = xmlfact.Invoice

nNamespace4..URI = "urn:oasis:names:specification:ubl:schema:xsd:Invoice-2" //1
nNamespace3..URI = "urn:oasis:names:specification:ubl:schema:xsd:CommonAggregateComponents-2" //2
nNamespace3..Name = "cac" //2
nNamespace2..Name = "cbc"
nNamespace2..URI = "urn:oasis:names:specification:ubl:schema:xsd:CommonBasicComponents-2"//3
nNamespace1..Name = "xsi"
nNamespace1..URI = "http://www.w3.org/2001/XMLSchema-instance";

Add(nNode..NamespaceDeclared, nNamespace4)
Add(nNode..NamespaceDeclared, nNamespace3)
Add(nNode..NamespaceDeclared, nNamespace2)
Add(nNode..NamespaceDeclared, nNamespace1)

nNode:schemaLocation..Value = "urn:oasis:names:specification:ubl:schema:xsd:Invoice-2 http://docs.oasis-open.org/ubl/os-UBL-2.1/xsd/maindoc/UBL-Invoice-2.1.xsd";
nNode:schemaLocation..Namespace = nNamespace1



von Allard - am 08.03.2016 07:29
Thanks Allard,

I'll try using the namespace to add the attribute.

Best regards

von Ola - am 08.03.2016 10:56
Namespace did the trick of adding the attribute to the first node, but it caused also a problem:

xAppReq is xmlDocument
xNamespace is xmlNamespace
xNode is dynamic xmlNode
xNode = xAppReq.ApplicationRequest
//xNamespace..Name = "xmlns" //This validates, but creates a double entry like this:
//[ApplicationRequest xmlns="http://bxd.fi/xmldata/"; xmlns:xmlns="http://bxd.fi/xmldata/";]
xNamespace..URI = "http://bxd.fi/xmldata/"; //"xmlns=" is added automatically in front of URI!

The Add generates a Weird error, although the file looks perfectly good and the file validates when saving it!
'Add' function, syntax 1
The '' namespace is already defined in this node.
Two namespaces with the same name cannot exist within the same node.
Error code: 40039
Level: non-fatal error (EL_ONRETURN)
This error does not pop-up itself, but it is launched,
if the process is interrupted for any reason, like manual cancellation.
- this is obviously caused because I took ouit the xNamespace..Name = "xmlns" line,
which caused a double entry
- so how should i handle the xNamespace..Name = "xmlns" line ???

How can I kill this error (or add the attribute "correctly")?

Best regards

von Ola - am 09.03.2016 10:31
Hi. If you use a XSD file you don't need assign the namespace. Windev add it when you check and save the xml.

Linea is xmlDocument, description="XSD file name" // imported in project

// Add here your nodes with the XSD order

Linea.Node Name = Node Value

IF XMLValidDocument(Linea) = True THEN
XMLSave(Linea, fExeDir() + "\XML_Temp\File.xml")
IF ErrorOccurred = True THEN
Error("Unable to save the XML document", ErrorInfo())
Info("OK", fExeDir() + "\XML_Temp\File.xml")
Error("The XML document is invalid", ErrorInfo())

When you Save the XML then Windev apply the XSD format to XML resultant and check the correct XML content.


von Ruben Sanchez Peña - am 09.03.2016 11:52
Hi Ruben,

Thank you very much; it works like you said. I tried this also earlier, but then it didn't work -- possibly because then there was some other problems with the code.
But now the attribute is there, and the xml building code now looks like this:

xAppReq is xmlDocument, description="ApplicationRequest" //Imported WSDL
xNode is dynamic xmlNode
xNode = xAppReq.ApplicationRequest
xAppReq.ApplicationRequest[1].CustomerId = wCustomerId
xAppReq.ApplicationRequest[1].Timestamp = wTimeStamp
xAppReq.ApplicationRequest[1].Environment = wEnvironment
xAppReq.ApplicationRequest[1].TargetId = wTargetId
xAppReq.ApplicationRequest[1].Compression = "false"
xAppReq.ApplicationRequest[1].AmountTotal = C_Sum
xAppReq.ApplicationRequest[1].TransactionCount = C_Counter
xAppReq.ApplicationRequest[1].SoftwareId = wSoftwareId
xAppReq.ApplicationRequest[1].FileType = "pain.001.001.02"
xAppReq.ApplicationRequest[1].Content = XFileInString64 //Base 64 -coded "payload"

So far this is good. The file validates without hick-ups and the correct dota seems to be in correct places.

The next step is the signing. According to documents: "Digitally sign (Enveloped -type) the whole "Application Request" with the Private Key of the Signing Certificate."

I am trying to initialize the signature with a code piece mainly copied from WD help example:

MySignature is xmlSignature
MySignature..AlgorithmNormalization = atC14NExclusive //What is this?
MySignature..AlgorithmSignature = asRSA_SHA_160 //Obviously same as the RSA SHA-1 required by Nordea
// Key file OR certificate retrieved by the certificate functions:
MySignature..Key = wWsPrivCertFile //File name with full path of the private certificate file
MySignature..KeyPassword = wPassword //Password for testing = "WSNDEA1234"
MySignature..KeyFileType = tfcPKCS12 //certificate file has ".p12" extension
MySignature..Reference[1]..AlgorithmHash = HA_SHA_160
MySignature..Reference[1]..URI = "#xpointer(/)" //in WD sample: "#" + id - wonder what this is.
//is it OK to just add verbatim the "#xpointer(/)", like in the example file?
MySignature..Reference[1]..Transformation[1] = atEnveloped //Type of signatue
MySignature..Reference[1]..Transformation[2] = atC14NExclusive //What is this?
x509 is xmlSignatureInformationKeyX509
x509..WithCertificate = True
MySignature..KeyInformation[1] = x509

This probably is not yet fully correct, but at this point I am just trying to get some kind of,/any kind of signature into the document.

So how should I add these signature elements to the document? The next node, with these kinds of child elements is "Signature".
The first message in this thread shows how the signature section looks like in the sample file and the schema.

best regards

von Ola - am 09.03.2016 16:26
Has anyone been successfull signing an XML?

von Irving - am 20.12.2016 16:27
Hi All

Irving's question - has anyone been successful (i.e. does this work in WinDev 22).

Ola - were you able to complete that signed xml job in WinDev?


von DerekM-2 - am 10.09.2017 10:44
Hi all interested,

I had to interrupt my XML development due to the many problems I encountered when upgrading from WD19 to 21, and then I was faced with more important development tasks. I hope to be able to concentrate on this again later this year.

However, I was instructed that XML signing is NOT possible with WD as such, but it can be done with WD using .NET Framework v2.0 components:
and system.xml.dll.

There is a French language LST 103 publication with an example on how to do this ("SIGNER DES DOCUMENTS XML AVEC WINDEV (EXEMPLE D’UTILISATION DE .NET)").
It requires the use of WD (min.) version 20, or, some workaround coding, if using an earlier version.

Note that there seems to be different signing standards, and I cannot be sure whether the sample would be compatible with my (or your) needs.

Best regards

von Ola - am 11.09.2017 12:56
Hi all , Irving

I was able to create UBL invoising etc . all XML with a complex xsd that windev couldnot handle. ( nested xsd structure ) Using namspace it works like a charm.

I also was able to create audit file xml file ( in Holland for exporting complete acccounting systems ) I was able to create them and also read from them.

I use it now to make complete backup resptore of everything in the system. So for me It works I t could all be done with just windev ( version 21)


von Allard - am 12.09.2017 11:07
Hi Allard,

Can you tell how you do the signature of XML files, and the identification of signed XML files, either simple or complex, with WD only?

Best regards

von Ola - am 12.09.2017 20:03

Took a quick look at what the specific signing is :xcool:

The problem as I see it is not the adding of the signature to the xml. It is the calculation of the signature where the difficult part lays.

Adding a signature is adding the tags etc as described :
" link "

The xml part:
You canuse and xsd. If no xsd you can still use an xml file and import that ( so you can use intellisence for the nodes )


von Allard - am 13.09.2017 08:52
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