Swift

Sign a File to Create a .p7m File (using a PFX)

See more Encryption Examples

_LANGUAGE_ example to sign a file creating a .p7m file as output. The .p7m contains the signed contents of the original file. It can be verified and restored by calling VerifyP7M. Swift

func chilkatTest() {
    var success: Bool = false

    // This example 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 signingCertSubject: String? = "Acme Inc"
    var pfxFilename: String? = "/Users/chilkat/testData/pfx/acme.pfx"
    var pfxPassword: String? = "test123"

    let certStore = CkoCertStore()!
    success = certStore.loadPfxFile(path: pfxFilename, password: pfxPassword)
    if success != true {
        print("\(certStore.lastErrorText!)")
        return
    }

    let jsonCN = CkoJsonObject()!
    jsonCN.updateString(jsonPath: "CN", value: signingCertSubject)

    let cert = CkoCert()!
    success = certStore.findCert(json: jsonCN, cert: cert)
    if success == false {
        print("Failed to find certificate by subject common name.")
        return
    }

    // Tell the crypt component to use this cert.
    success = crypt.setSigningCert(cert: cert)

    // We can sign any type of file, creating a .p7m as output:
    var inFile: String? = "/Users/chilkat/testData/pdf/sample.pdf"
    var outputFile: String? = "/Users/chilkat/testData/p7m/sample.pdf.p7m"
    success = crypt.createP7M(inPath: inFile, p7mPath: outputFile)
    if success == false {
        print("\(crypt.lastErrorText!)")
        return
    }

    // Verify and restore the original file:
    success = crypt.setVerifyCert(cert: cert)

    inFile = outputFile
    outputFile = "/Users/chilkat/testData/pdf/restored.pdf"

    success = crypt.verifyP7M(p7mPath: inFile, destPath: outputFile)
    if success == false {
        print("\(crypt.lastErrorText!)")
        return
    }

    print("Success!")

}