(Swift) Extract XML string from a .p7m byte array (e.g. FATTURA ELETTRONICA, ITALY)

Swift example to extract the original XML from a .p7m (Signed-Data PKCS7 Format) provided as a byte array.

One use for this example is to extract the original XML from a Fattura Elettronica .p7m signature.

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    let fac = CkoFileAccess()!
    var p7mBytes: NSData
    p7mBytes = fac.readEntireFile("testData/p7m/fattura_signature.p7m")
    if fac.lastMethodSuccess != true {
        print("\(fac.lastErrorText!)")
        return
    }

    let crypt = CkoCrypt2()!

    var originalXml: String? = crypt.opaqueVerifyString(p7mBytes)
    if crypt.lastMethodSuccess != true {
        print("\(fac.lastErrorText!)")
        return
    }

    print("Original XML:")
    print("\(originalXml!)")

    print("Success!")

}