(Swift 3,4,5...) Create CAdES-BES .p7m for FatturaPA XML Invoice

Demonstrates how to create a CAdES BES invoice.xml.p7m for the Italian FatturaPA exchange system.

Note: This example requires Chilkat v9.5.0.75.

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func chilkatTest() {
    // Note: Requires Chilkat v9.5.0.75 or greater.

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

    let crypt = CkoCrypt2()!

    // Use a digital certificate and private key from a PFX file (.pfx or .p12).
    var pfxPath: String? = "qa_data/pfx/cert_test123.pfx"
    var pfxPassword: String? = "test123"

    let cert = CkoCert()!
    var success: Bool = cert.loadPfxFile(pfxPath, password: pfxPassword)
    if success != true {
        print("\(cert.lastErrorText!)")
        return
    }

    // Provide the signing cert (with associated private key).
    success = crypt.setSigning(cert)
    if success != true {
        print("\(crypt.lastErrorText!)")
        return
    }

    // Indicate that SHA-256 should be used.
    crypt.hashAlgorithm = "sha256"

    // Specify the signed attributes to be included.
    // (This is what makes it CAdES-BES compliant.)
    let jsonSignedAttrs = CkoJsonObject()!
    jsonSignedAttrs.updateInt("contentType", value: 1)
    jsonSignedAttrs.updateInt("signingTime", value: 1)
    jsonSignedAttrs.updateInt("messageDigest", value: 1)
    jsonSignedAttrs.updateInt("signingCertificateV2", value: 1)
    crypt.signingAttributes = jsonSignedAttrs.emit()

    var inFile: String? = "qa_data/xml/IT01234567890_11002.xml"
    var sigFile: String? = "qa_output/IT01234567890_11002.xml.p7m"

    // Create the CAdES-BES signature, which contains the original data.
    success = crypt.createP7M(inFile, p7mPath: sigFile)
    if success == false {
        print("\(crypt.lastErrorText!)")
        return
    }

    print("Success.")

}