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(Swift 3,4,5...) Signed Zip as Base64 with XAdES-BESThis example is to help companies implement a solution for sending XAdES-BES to the Polish government for reporting purposes. Specifically: Przed podpisaniem deklaracja zbiorcza (PIT-11Z, PIT-8CZ, PIT-40Z, PIT-RZ) musi zostać The example demonstrates the following:
This example will also show the reverse:
func chilkatTest() { // This example assumes the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // Zip the PIT-11Z.xml to create PIT-11Z.zip (not as a .zip file, but in-memory). let sbXmlToZip = CkoStringBuilder()! var success: Bool = sbXmlToZip.loadFile("qa_data/xml/PIT-11Z.xml", charset: "utf-8") if success != true { print("Failed to load the XML to be zipped.") return } let zip = CkoZip()! // Initialize the zip object. No file is created in this call. // It should always return true. success = zip.newZip("PIT-11Z.zip") // Add the XML to be zipped. var entry: CkoZipEntry? = zip.append("PIT-11Z.xml", str: sbXmlToZip.getAsString()) entry = nil // Write the zip to a BinData object. let bdZip = CkoBinData()! zip.writeBd(bdZip) // The contents of the bdZip will be retrieved in base64 format when needed below.. let gen = CkoXmlDSigGen()! gen.sigLocation = "" gen.sigLocationMod = 0 gen.sigId = "Signature_2a8df7f8-b958-40cc-83f6-edb53b837347_19" gen.sigNamespacePrefix = "ds" gen.sigNamespaceUri = "http://www.w3.org/2000/09/xmldsig#" gen.sigValueId = "SignatureValue_2a8df7f8-b958-40cc-83f6-edb53b837347_52" gen.signedInfoId = "SignedInfo_2a8df7f8-b958-40cc-83f6-edb53b837347_41" gen.signedInfoCanonAlg = "C14N" gen.signedInfoDigestMethod = "sha1" // Set the KeyInfoId before adding references.. gen.keyInfoId = "KeyInfo_2a8df7f8-b958-40cc-83f6-edb53b837347_24" // Create an Object to be added to the Signature. let object1 = CkoXml()! object1.tag = "xades:QualifyingProperties" object1.addAttribute("xmlns:xades", value: "http://uri.etsi.org/01903/v1.3.2#") object1.addAttribute("Id", value: "QualifyingProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_43") object1.addAttribute("Target", value: "#Signature_2a8df7f8-b958-40cc-83f6-edb53b837347_19") object1.updateAttr(at: "xades:SignedProperties", autoCreate: true, attrName: "Id", attrValue: "SignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4e") object1.updateAttr(at: "xades:SignedProperties|xades:SignedSignatureProperties", autoCreate: true, attrName: "Id", attrValue: "SignedSignatureProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_0a") // Chilkat will replace the strings "TO BE GENERATED BY CHILKAT" with actual values when the signature is created. object1.updateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningTime", value: "TO BE GENERATED BY CHILKAT") // 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 object1.updateAttr(at: "xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestMethod", autoCreate: true, attrName: "Algorithm", attrValue: "http://www.w3.org/2000/09/xmldsig#sha1") object1.updateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:CertDigest|ds:DigestValue", value: "TO BE GENERATED BY CHILKAT") object1.updateChildContent("xades:SignedProperties|xades:SignedSignatureProperties|xades:SigningCertificateV2|xades:Cert|xades:IssuerSerialV2", value: "TO BE GENERATED BY CHILKAT") object1.updateAttr(at: "xades:SignedProperties|xades:SignedDataObjectProperties", autoCreate: true, attrName: "Id", attrValue: "SignedDataObjectProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4b") object1.updateAttr(at: "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat", autoCreate: true, attrName: "ObjectReference", attrValue: "#Reference1_2a8df7f8-b958-40cc-83f6-edb53b837347_27") object1.updateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:Description", value: "MIME-Version: 1.0\r\nContent-Type: application/zip\r\nContent-Transfer-Encoding: binary\r\nContent-Disposition: filename="PIT-11Z.zip"") object1.updateAttr(at: "xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Identifier", autoCreate: true, attrName: "Qualifier", attrValue: "OIDAsURI") object1.updateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Identifier", value: "http://www.certum.pl/OIDAsURI/signedFile/1.2.616.1.113527.3.1.1.3.1") object1.updateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:Description", value: "Opis formatu dokumentu oraz jego pelna nazwa") object1.updateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:ObjectIdentifier|xades:DocumentationReferences|xades:DocumentationReference", value: "http://www.certum.pl/OIDAsURI/signedFile.pdf") object1.updateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:DataObjectFormat|xades:MimeType", value: "application/zip") object1.updateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:CommitmentTypeIndication|xades:CommitmentTypeId|xades:Identifier", value: "http://uri.etsi.org/01903/v1.2.2#ProofOfApproval") object1.updateChildContent("xades:SignedProperties|xades:SignedDataObjectProperties|xades:CommitmentTypeIndication|xades:AllSignedDataObjects", value: "") object1.updateAttr(at: "xades:UnsignedProperties", autoCreate: true, attrName: "Id", attrValue: "UnsignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_55") // Emit XML in compact (single-line) format to avoid whitespace problems. object1.emitCompact = true gen.addObject("", content: object1.getXml(), mimeType: "", encoding: "") // Create an Object to be added to the Signature. // This is where we add the base64 representation of the PIT-11Z.zip gen.addObject("Object1_2a8df7f8-b958-40cc-83f6-edb53b837347", content: bdZip.getEncoded("base64"), mimeType: "", encoding: "http://www.w3.org/2000/09/xmldsig#base64") // -------- Reference 1 -------- gen.addObjectRef("Object1_2a8df7f8-b958-40cc-83f6-edb53b837347", digestMethod: "sha1", canonMethod: "C14N_WithComments", prefixList: "", refType: "") gen.setRefIdAttr("Object1_2a8df7f8-b958-40cc-83f6-edb53b837347", value: "Reference1_2a8df7f8-b958-40cc-83f6-edb53b837347_27") // -------- Reference 2 -------- gen.addObjectRef("SignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4e", digestMethod: "sha1", canonMethod: "", prefixList: "", refType: "http://uri.etsi.org/01903#SignedProperties") gen.setRefIdAttr("SignedProperties_2a8df7f8-b958-40cc-83f6-edb53b837347_4e", value: "SignedProperties-Reference_2a8df7f8-b958-40cc-83f6-edb53b837347_28") // Provide a certificate + private key. (PFX password is test123) let cert = CkoCert()! success = cert.loadPfxFile("qa_data/pfx/cert_test123.pfx", password: "test123") if success != true { print("\(cert.lastErrorText!)") return } gen.setX509Cert(cert, usePrivateKey: true) gen.keyInfoType = "X509Data" gen.x509Type = "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()! // The Polish government's XmlDSig implementation requires that we reproduce an attribute-sorting error. // (This is an error in the XML canonicalization that is not noticed when both the signature-creation code and signature-verification code use // the same XML canonicalization implementation w/ the bug.) gen.behaviors = "AttributeSortingBug,CompactSignedXml" // Sign the XML... success = gen.createXmlDSigSb(sbXml) if success != true { print("\(gen.lastErrorText!)") return } // ----------------------------------------------- // Save the signed XML to a file. success = sbXml.writeFile("qa_output/signedXml.xml", charset: "utf-8", emitBom: false) print("\(sbXml.getAsString()!)") // ---------------------------------------- // Verify the signature we just produced... let verifier = CkoXmlDSig()! success = verifier.loadSignatureSb(sbXml) if success != true { print("\(verifier.lastErrorText!)") return } var verified: Bool = verifier.verifySignature(true) if verified != true { print("\(verifier.lastErrorText!)") return } print("This signature was successfully verified.") // ------------------------------------ // Finally, let's extract the .zip from the signed XML, and then unzip the original PIT-11Z.xml from the in-memory zip. let xml = CkoXml()! xml.loadSb(sbXml, autoTrim: true) // The base64 image of the PIT-11Z.zip is in the 2nd ds:Object child of the ds:Signature (the ds:Signature is the root element of the signed XML). // (ds:Object[0] would be the 1st ds:Object child. Index 1 is the 2nd ds:Object child.) var strZipBase64: String? = xml.getChildContent("ds:Object[1]") bdZip.clear() bdZip.appendEncoded(strZipBase64, encoding: "base64") if bdZip.numBytes.intValue == 0 { print("Something went wrong.. we dont' have any data..") return } success = zip.openBd(bdZip) if success != true { print("\(zip.lastErrorText!)") return } // Get the 1st file in the zip, which should be the PIT-11Z.xml entry = zip.getEntryByIndex(0) if zip.lastMethodSuccess != true { print("Zip contains no files...") return } // Get the XML: var origXml: String? = entry!.unzip(toString: 0, srcCharset: "utf-8") print("Original XML extracted from base64 zip:") print("\(origXml!)") entry = nil } |
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