Swift

Check if a MIME Entity is Encrypted (S/MIME)

Demonstrates the Chilkat Mime.IsEncrypted method, which returns whether the entity is a CMS/PKCS #7 encrypted S/MIME wrapper. It takes no arguments.

Note: The file path is relative to the application's current working directory. Absolute paths may also be used. Supply the path to your own file.

Background: This tells you a message is encrypted and must be decrypted before its real content is available — the trigger for supplying a recipient certificate and private key to Decrypt. Reading the body without decrypting first would just yield the opaque PKCS #7 blob.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the Mime.IsEncrypted method, which returns whether the entity is a CMS/PKCS #7 encrypted S/MIME wrapper.  It takes no arguments.

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

    if mime.isEncrypted() {
        print("This is an encrypted S/MIME message.")
    }
    else {
        print("This is not an encrypted S/MIME message.")
    }


}