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(Visual FoxPro) XML-DSig Add Object Reference with Transforms Specified Explicitly

Demonstrates how to use the new AddObjectRef2 method to explicitly specify the XML Transforms fragment.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL lnSuccess
LOCAL loXmlToSign
LOCAL loGen
LOCAL loObject1
LOCAL loXml1
LOCAL loXml2
LOCAL loCert
LOCAL loSbXml
LOCAL loVerifier
LOCAL lnNumSigs
LOCAL lnVerifyIdx
LOCAL lnVerified

* This example requires the Chilkat API to have been previously unlocked.
* See Global Unlock Sample for sample code.

lnSuccess = 1

* Build the following XML to be signed:

* <?xml version="1.0" encoding="utf-8"?>
* <InitUpload xmlns="http://e-dokumenty.mf.gov.pl">
*     <DocumentType>JPK</DocumentType>
*     <Version>01.02.01.20160617</Version>
*     <EncryptionKey algorithm="RSA" encoding="Base64" mode="ECB" padding="PKCS#1">xxxx</EncryptionKey>
*     <DocumentList>
*         <Document>
*             <FormCode schemaVersion="1-1" systemCode="JPK_VAT (3)">JPK_VAT</FormCode>
*             <FileName>JPK_VAT_3_v1-1_20181201.xml</FileName>
*             <ContentLength>8736</ContentLength>
*             <HashValue algorithm="SHA-256" encoding="Base64">JEDI1pItwh6dj/Xx1uts/x61qnjZ4DLHpkZMhmf1oKQ=</HashValue>
*             <FileSignatureList filesNumber="1">
*                 <Packaging>
*                     <SplitZip mode="zip" type="split"/>
*                 </Packaging>
*                 <Encryption>
*                     <AES block="16" mode="CBC" padding="PKCS#7" size="256">
*                         <IV bytes="16" encoding="Base64">z64oN9zXHt1+S3XACRSCYw==</IV>
*                     </AES>
*                 </Encryption>
*                 <FileSignature>
*                     <OrdinalNumber>1</OrdinalNumber>
*                     <FileName>JPK_VAT_3_v1-1_20181201-000.xml.zip.aes</FileName>
*                     <ContentLength>16</ContentLength>
*                     <HashValue algorithm="MD5" encoding="Base64">5MX0q1935fvMjLFV7E1yDw==</HashValue>
*                 </FileSignature>
*             </FileSignatureList>
*         </Document>
*     </DocumentList>
* </InitUpload>

* Use this online tool to generate code from sample XML: 
* Generate Code to Create XML

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Xml')
loXmlToSign = CreateObject('Chilkat.Xml')
loXmlToSign.Tag = "InitUpload"
loXmlToSign.AddAttribute("xmlns","http://e-dokumenty.mf.gov.pl")
loXmlToSign.UpdateChildContent("DocumentType","JPK")
loXmlToSign.UpdateChildContent("Version","01.02.01.20160617")
loXmlToSign.UpdateAttrAt("EncryptionKey",1,"algorithm","RSA")
loXmlToSign.UpdateAttrAt("EncryptionKey",1,"encoding","Base64")
loXmlToSign.UpdateAttrAt("EncryptionKey",1,"mode","ECB")
loXmlToSign.UpdateAttrAt("EncryptionKey",1,"padding","PKCS#1")
loXmlToSign.UpdateChildContent("EncryptionKey","xxxx")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FormCode",1,"schemaVersion","1-1")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FormCode",1,"systemCode","JPK_VAT (3)")
loXmlToSign.UpdateChildContent("DocumentList|Document|FormCode","JPK_VAT")
loXmlToSign.UpdateChildContent("DocumentList|Document|FileName","JPK_VAT_3_v1-1_20181201.xml")
loXmlToSign.UpdateChildContent("DocumentList|Document|ContentLength","8736")
loXmlToSign.UpdateAttrAt("DocumentList|Document|HashValue",1,"algorithm","SHA-256")
loXmlToSign.UpdateAttrAt("DocumentList|Document|HashValue",1,"encoding","Base64")
loXmlToSign.UpdateChildContent("DocumentList|Document|HashValue","JEDI1pItwh6dj/Xx1uts/x61qnjZ4DLHpkZMhmf1oKQ=")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList",1,"filesNumber","1")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Packaging|SplitZip",1,"mode","zip")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Packaging|SplitZip",1,"type","split")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",1,"block","16")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",1,"mode","CBC")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",1,"padding","PKCS#7")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES",1,"size","256")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES|IV",1,"bytes","16")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|Encryption|AES|IV",1,"encoding","Base64")
loXmlToSign.UpdateChildContent("DocumentList|Document|FileSignatureList|Encryption|AES|IV","z64oN9zXHt1+S3XACRSCYw==")
loXmlToSign.UpdateChildContent("DocumentList|Document|FileSignatureList|FileSignature|OrdinalNumber","1")
loXmlToSign.UpdateChildContent("DocumentList|Document|FileSignatureList|FileSignature|FileName","JPK_VAT_3_v1-1_20181201-000.xml.zip.aes")
loXmlToSign.UpdateChildContent("DocumentList|Document|FileSignatureList|FileSignature|ContentLength","16")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|FileSignature|HashValue",1,"algorithm","MD5")
loXmlToSign.UpdateAttrAt("DocumentList|Document|FileSignatureList|FileSignature|HashValue",1,"encoding","Base64")
loXmlToSign.UpdateChildContent("DocumentList|Document|FileSignatureList|FileSignature|HashValue","5MX0q1935fvMjLFV7E1yDw==")

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.XmlDSigGen')
loGen = CreateObject('Chilkat.XmlDSigGen')

loGen.SigLocation = "InitUpload"
loGen.SigLocationMod = 0
loGen.SigId = "id-1234"
loGen.SigNamespacePrefix = "ds"
loGen.SigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
loGen.SignedInfoCanonAlg = "EXCL_C14N"
loGen.SignedInfoDigestMethod = "sha256"

* Create an Object to be added to the Signature.

* <xades:QualifyingProperties Target="#id-1234" xmlns:xades="http://uri.etsi.org/01903/v1.3.2#">
*     <xades:SignedProperties Id="xades-id-1234">
*         <xades:SignedSignatureProperties>
*             <xades:SigningTime>TO BE GENERATED BY CHILKAT</xades:SigningTime>
*             <xades:SigningCertificate>
*                 <xades:Cert>
*                     <xades:CertDigest>
*                         <ds:DigestMethod Algorithm="http://www.w3.org/2000/09/xmldsig#sha1"/>
*                         <ds:DigestValue>TO BE GENERATED BY CHILKAT</ds:DigestValue>
*                     </xades:CertDigest>
*                     <xades:IssuerSerial>
*                         <ds:X509IssuerName>TO BE GENERATED BY CHILKAT</ds:X509IssuerName>
*                         <ds:X509SerialNumber>TO BE GENERATED BY CHILKAT</ds:X509SerialNumber>
*                     </xades:IssuerSerial>
*                 </xades:Cert>
*             </xades:SigningCertificate>
*         </xades:SignedSignatureProperties>
*         <xades:SignedDataObjectProperties>
*             <xades:DataObjectFormat ObjectReference="#r-id-1">
*                 <xades:MimeType>text/xml</xades:MimeType>
*             </xades:DataObjectFormat>
*         </xades:SignedDataObjectProperties>
*     </xades:SignedProperties>
* </xades:QualifyingProperties>

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Xml')
loObject1 = CreateObject('Chilkat.Xml')
loObject1.Tag = "xades:QualifyingProperties"
loObject1.AddAttribute("Target","#id-1234")
loObject1.AddAttribute("xmlns:xades","http://uri.etsi.org/01903/v1.3.2#")
loObject1.UpdateAttrAt("xades:SignedProperties",1,"Id","xades-id-1234")
* Note: It may be that http://www.w3.org/2001/04/xmlenc#sha256 is needed in the following line instead of http://www.w3.org/2000/09/xmldsig#sha1
loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime","TO BE GENERATED BY CHILKAT")
loObject1.UpdateAttrAt("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestMethod",1,"Algorithm","http://www.w3.org/2000/09/xmldsig#sha1")
loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:CertDigest|ds:DigestValue","TO BE GENERATED BY CHILKAT")
loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509IssuerName","TO BE GENERATED BY CHILKAT")
loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificate|xades:Cert|xades:IssuerSerial|ds:X509SerialNumber","TO BE GENERATED BY CHILKAT")
loObject1.UpdateAttrAt("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat",1,"ObjectReference","#r-id-1")
loObject1.UpdateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:MimeType","text/xml")

loGen.AddObject("",loObject1.GetXml(),"","")

* -------- Reference 1 --------
* Build the following Transforms fragment:

* <ds:Transforms>
*     <ds:Transform Algorithm="http://www.w3.org/TR/1999/REC-xpath-19991116">
*         <ds:XPath>not(ancestor-or-self::ds:Signature)</ds:XPath>
*     </ds:Transform>
*     <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
* </ds:Transforms>

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Xml')
loXml1 = CreateObject('Chilkat.Xml')
loXml1.Tag = "ds:Transforms"
loXml1.UpdateAttrAt("ds:Transform",1,"Algorithm","http://www.w3.org/TR/1999/REC-xpath-19991116")
loXml1.UpdateChildContent("ds:Transform|ds:XPath","not(ancestor-or-self::ds:Signature)")
loXml1.UpdateAttrAt("ds:Transform[1]",1,"Algorithm","http://www.w3.org/2001/10/xml-exc-c14n#")

loGen.AddSameDocRef2("","sha256",loXml1,"")
loGen.SetRefIdAttr("","r-id-1")

* -------- Reference 2 --------
* Build the following Transforms fragment:

* <ds:Transforms>
*     <ds:Transform Algorithm="http://www.w3.org/2001/10/xml-exc-c14n#"/>
* </ds:Transforms>

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Xml')
loXml2 = CreateObject('Chilkat.Xml')
loXml2.Tag = "ds:Transforms"
loXml2.UpdateAttrAt("ds:Transform",1,"Algorithm","http://www.w3.org/2001/10/xml-exc-c14n#")

loGen.AddObjectRef2("xades-id-1234","sha256",loXml2,"http://uri.etsi.org/01903#SignedProperties")

* Provide a certificate + private key. (PFX password is test123)
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Cert')
loCert = CreateObject('Chilkat.Cert')
lnSuccess = loCert.LoadPfxFile("qa_data/pfx/cert_test123.pfx","test123")
IF (lnSuccess <> 1) THEN
    ? loCert.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loObject1
    RELEASE loXml1
    RELEASE loXml2
    RELEASE loCert
    CANCEL
ENDIF

loGen.SetX509Cert(loCert,1)

loGen.KeyInfoType = "X509Data"
loGen.X509Type = "Certificate"

* Load XML to be signed...
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.StringBuilder')
loSbXml = CreateObject('Chilkat.StringBuilder')
loXmlToSign.GetXmlSb(loSbXml)

loGen.Behaviors = "IndentedSignature"

* Sign the XML...
lnSuccess = loGen.CreateXmlDSigSb(loSbXml)
IF (lnSuccess <> 1) THEN
    ? loGen.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loObject1
    RELEASE loXml1
    RELEASE loXml2
    RELEASE loCert
    RELEASE loSbXml
    CANCEL
ENDIF

* -----------------------------------------------

* Save the signed XML to a file.
lnSuccess = loSbXml.WriteFile("qa_output/signedXml.xml","utf-8",0)

? loSbXml.GetAsString()

* ----------------------------------------
* Verify the signatures we just produced...
* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.XmlDSig')
loVerifier = CreateObject('Chilkat.XmlDSig')
lnSuccess = loVerifier.LoadSignatureSb(loSbXml)
IF (lnSuccess <> 1) THEN
    ? loVerifier.LastErrorText
    RELEASE loXmlToSign
    RELEASE loGen
    RELEASE loObject1
    RELEASE loXml1
    RELEASE loXml2
    RELEASE loCert
    RELEASE loSbXml
    RELEASE loVerifier
    CANCEL
ENDIF

lnNumSigs = loVerifier.NumSignatures
lnVerifyIdx = 0
DO WHILE lnVerifyIdx < lnNumSigs
    loVerifier.Selector = lnVerifyIdx
    lnVerified = loVerifier.VerifySignature(1)
    IF (lnVerified <> 1) THEN
        ? loVerifier.LastErrorText
        RELEASE loXmlToSign
        RELEASE loGen
        RELEASE loObject1
        RELEASE loXml1
        RELEASE loXml2
        RELEASE loCert
        RELEASE loSbXml
        RELEASE loVerifier
        CANCEL
    ENDIF

    lnVerifyIdx = lnVerifyIdx + 1
ENDDO
? "All signatures were successfully verified."

RELEASE loXmlToSign
RELEASE loGen
RELEASE loObject1
RELEASE loXml1
RELEASE loXml2
RELEASE loCert
RELEASE loSbXml
RELEASE loVerifier
 

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