(Swift 3,4,5...) Create PKCS7 Signed File (.p7m)

Demonstrates how to sign a file to create a .p7m that contains both the file contents and the 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 crypt = CkoCrypt2()!

    let certStore = CkoCertStore()!

    // Load a PFX file into a certificate store object.
    var success: Bool = certStore.loadPfxFile("myPfx.pfx", password: "pfxPassword")
    if success != true {
        print("\(certStore.lastErrorText!)")
        return
    }

    // Get the certificate by subject common name.
    // This should be the cert within the PFX that also
    // has a private key (also stored within the PFX).
    var cert: CkoCert? = certStore.findCert(bySubjectCN: "myCert")
    if certStore.lastMethodSuccess == false {
        print("\(certStore.lastErrorText!)")
        return
    }

    // Tell the crypt object to use the certificate for signing:
    success = crypt.setSigning(cert)

    // Sign a file, producing a .p7m as output.
    // The input file is unchanged, the test.p7m contains the 
    // contents of the input file and the signature.
    var inFile: String? = "test.txt"
    var outFile: String? = "testp7m"
    success = crypt.createP7M(inFile, p7mPath: outFile)
    if success != true {
        print("\(crypt.lastErrorText!)")
        return
    }

    print("Success!")

}