Decrypt S/MIME using a Certificate with Private Key Access

See more MIME Examples

Loads a CMS/PKCS #7 encrypted S/MIME message and decrypts it back to the original MIME content.

DecryptUsingCert takes a single certificate that already has access to its associated private key, for example a certificate loaded from a PFX.

The file paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.

func chilkatTest() {
    var success: Bool = false

    let mime = CkoMime()!
    success = mime.loadFile(path: "qa_data/encrypted.eml")
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    //  Decrypt using a certificate that already provides access to its private key (for example loaded
    //  from a PFX).  The only argument is the certificate.
    var pfxPassword: String? = "myPfxPassword"
    let cert = CkoCert()!
    success = cert.loadPfxFile(path: "qa_data/recipient.pfx", password: pfxPassword)
    if success == false {
        print("\(cert.lastErrorText!)")
        return
    }

    success = mime.decrypt(usingCert: cert)
    if success == false {
        print("\(mime.lastErrorText!)")
        return
    }

    var body: String? = mime.getBodyDecoded()
    if mime.lastMethodSuccess == false {
        print("\(mime.lastErrorText!)")
        return
    }

    print("\(body!)")

}