Swift
Swift
XML Signature Multiple External References
See more XML Digital Signatures Examples
Demonstrates how to add multiple external references to an XML digital signature.Chilkat Swift Downloads
func chilkatTest() {
var success: Bool = false
// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.
// This example creates the following signed XML with multiple external references:
// <?xml version="1.0" encoding="UTF-8"?>
// <ds:Signature xmlns:ds="http://www.w3.org/2000/09/xmldsig#" Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4">
// <ds:SignedInfo>
// <ds:CanonicalizationMethod Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
// <ds:SignatureMethod Algorithm="http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"/>
// <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0" URI="https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456">
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1" URI="https://isus.ezdrowie.gov.pl/fhir/Encounter/124/_history/22">
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2" URI="https://isus.ezdrowie.gov.pl/fhir/Condition/125/_history/1">
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// <ds:Reference Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3" URI="https://isus.ezdrowie.gov.pl/fhir/Procedure/126/_history/1">
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// <ds:Reference Type="http://uri.etsi.org/01903#SignedProperties" URI="#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops">
// <ds:Transforms>
// <ds:Transform Algorithm="http://www.w3.org/TR/2001/REC-xml-c14n-20010315"/>
// </ds:Transforms>
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </ds:Reference>
// </ds:SignedInfo>
// <ds:SignatureValue Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue">...</ds:SignatureValue>
// <ds:KeyInfo>
// <ds:X509Data>
// <ds:X509Certificate>...</ds:X509Certificate>
// <ds:X509SubjectName>...</ds:X509SubjectName>
// <ds:X509IssuerSerial>
// <ds:X509IssuerName>...</ds:X509IssuerName>
// <ds:X509SerialNumber>...</ds:X509SerialNumber>
// </ds:X509IssuerSerial>
// </ds:X509Data>
// </ds:KeyInfo>
// <ds:Object>
// <xades:QualifyingProperties xmlns:xades="http://uri.etsi.org/01903/v1.3.2#" xmlns:xades141="http://uri.etsi.org/01903/v1.4.1#" Target="#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4">
// <xades:SignedProperties Id="xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops">
// <xades:SignedSignatureProperties>
// <xades:SigningTime>2021-06-02T07:10:13.306+02:00</xades:SigningTime>
// <xades:SigningCertificate>
// <xades:Cert>
// <xades:CertDigest>
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </xades:CertDigest>
// <xades:IssuerSerial>
// <ds:X509IssuerName>...</ds:X509IssuerName>
// <ds:X509SerialNumber>...</ds:X509SerialNumber>
// </xades:IssuerSerial>
// </xades:Cert>
// <xades:Cert>
// <xades:CertDigest>
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </xades:CertDigest>
// <xades:IssuerSerial>
// <ds:X509IssuerName>...</ds:X509IssuerName>
// <ds:X509SerialNumber>...</ds:X509SerialNumber>
// </xades:IssuerSerial>
// </xades:Cert>
// <xades:Cert>
// <xades:CertDigest>
// <ds:DigestMethod Algorithm="http://www.w3.org/2001/04/xmlenc#sha256"/>
// <ds:DigestValue>...</ds:DigestValue>
// </xades:CertDigest>
// <xades:IssuerSerial>
// <ds:X509IssuerName>...</ds:X509IssuerName>
// <ds:X509SerialNumber>...</ds:X509SerialNumber>
// </xades:IssuerSerial>
// </xades:Cert>
// </xades:SigningCertificate>
// </xades:SignedSignatureProperties>
// </xades:SignedProperties>
// </xades:QualifyingProperties>
// </ds:Object>
// </ds:Signature>
//
success = true
let gen = CkoXmlDSigGen()!
gen.sigLocation = ""
gen.sigLocationMod = 0
// Note: ID's simply need to be unique values in the signed XML document. They don't necessarily need to be GUID/UUID formatted.
gen.sigId = "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4"
gen.sigNamespacePrefix = "ds"
gen.sigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#"
gen.sigValueId = "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-sigvalue"
gen.signedInfoCanonAlg = "C14N"
gen.signedInfoDigestMethod = "sha256"
// Create an Object to be added to the Signature.
let object1 = CkoXml()!
object1.tag = "xades:QualifyingProperties"
object1.addAttribute(name: "xmlns:xades", value: "http://uri.etsi.org/01903/v1.3.2#")
object1.addAttribute(name: "xmlns:xades141", value: "http://uri.etsi.org/01903/v1.4.1#")
object1.addAttribute(name: "Target", value: "#xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4")
object1.updateAttrAt(tagPath: "xades:SignedProperties", autoCreate: true, attrName: "Id", attrValue: "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops")
object1.updateChildContent(tagPath: "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime", value: "TO BE GENERATED BY CHILKAT")
// This assumes there are 3 certs in the certificate chain: The signing certificate, an intermediate root, and the root CA.
// Remove the lines with "Cert[2]" if there is no intermediate root...
object1.updateAttrAt(tagPath: "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod", autoCreate: true, attrName: "Algorithm", attrValue: "http://www.w3.org/2001/04/xmlenc#sha256")
object1.updateChildContent(tagPath: "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue", value: "TO BE GENERATED BY CHILKAT")
object1.updateChildContent(tagPath: "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2", value: "TO BE GENERATED BY CHILKAT")
gen.add(id: "", content: object1.getXml(), mimeType: "", encoding: "")
let http = CkoHttp()!
let bd = CkoBinData()!
var url: String? = "https://isus.ezdrowie.gov.pl/fhir/Patient/123/_history/456"
success = http.quickGetBd(url: url, binData: bd)
if success != true {
print("\(http.lastErrorText!)")
return
}
// -------- Reference 1 --------
gen.addExternalBinaryRef(uri: url, content: bd, digestMethod: "sha256", refType: "")
gen.setRefIdAttr(uri_or_id: url, value: "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref0")
// -------- Reference 2 --------
bd.clear()
url = "https://isus.ezdrowie.gov.pl/fhir/Encounter/789/_history/1"
success = http.quickGetBd(url: url, binData: bd)
if success != true {
print("\(http.lastErrorText!)")
return
}
gen.addExternalBinaryRef(uri: url, content: bd, digestMethod: "sha256", refType: "")
gen.setRefIdAttr(uri_or_id: url, value: "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref1")
// -------- Reference 3 --------
bd.clear()
url = "https://isus.ezdrowie.gov.pl/fhir/Condition/123456/_history/1"
success = http.quickGetBd(url: url, binData: bd)
if success != true {
print("\(http.lastErrorText!)")
return
}
gen.addExternalBinaryRef(uri: url, content: bd, digestMethod: "sha256", refType: "")
gen.setRefIdAttr(uri_or_id: url, value: "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref2")
// -------- Reference 4 --------
bd.clear()
url = "https://isus.ezdrowie.gov.pl/fhir/Procedure/123456/_history/1"
success = http.quickGetBd(url: url, binData: bd)
if success != true {
print("\(http.lastErrorText!)")
return
}
gen.addExternalBinaryRef(uri: url, content: bd, digestMethod: "sha256", refType: "")
gen.setRefIdAttr(uri_or_id: url, value: "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-ref3")
// -------- Reference 5 --------
gen.addObjectRef(id: "xmldsig-2dde88a8-def0-43e4-8570-b031015a46b4-signedprops", digestMethod: "sha256", canonMethod: "C14N", prefixList: "", refType: "http://uri.etsi.org/01903#SignedProperties")
// Provide a certificate + private key. (PFX password is test123)
let cert = CkoCert()!
success = cert.loadPfxFile(path: "qa_data/pfx/cert_test123.pfx", password: "test123")
if success != true {
print("\(cert.lastErrorText!)")
return
}
gen.setX509Cert(cert: cert, usePrivateKey: true)
gen.keyInfoType = "X509Data"
gen.x509Type = "IssuerSerial,SubjectName,Certificate"
// This will be an enveloping signature where the Signature element
// is the XML document root, the signed data is contained within Object
// tag(s) within the Signature.
// Therefore, pass an empty sbXml to CreateXmlDsigSb.
let sbXml = CkoStringBuilder()!
gen.behaviors = "IndentedSignature"
// Sign the XML...
success = gen.createXmlDSigSb(sbXml: sbXml)
if success != true {
print("\(gen.lastErrorText!)")
return
}
// -----------------------------------------------
// Save the signed XML to a file.
success = sbXml.writeFile(path: "qa_output/signedXml.xml", charset: "utf-8", emitBom: false)
print("\(sbXml.getAsString()!)")
// ----------------------------------------
// Verify the signature we just produced...
let verifier = CkoXmlDSig()!
success = verifier.loadSignatureSb(sbXmlSig: sbXml)
if success != true {
print("\(verifier.lastErrorText!)")
return
}
var verified: Bool = verifier.verifySignature(verifyReferenceDigests: true)
if verified != true {
print("\(verifier.lastErrorText!)")
return
}
print("This signature was successfully verified.")
}