Swift

Check if a MIME Tree Contains Signed Parts

Demonstrates the Chilkat Mime.ContainsSignedParts method, which returns whether the currently visible MIME tree contains a complete detached or opaque CMS/PKCS #7 signed entity. 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: Where IsSigned asks whether the top entity is a signature wrapper, this scans the whole tree for a signed part nested anywhere inside — useful when signing is applied to a sub-part rather than the outermost entity. It is the discovery step before deciding whether verification is needed.

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Swift


func chilkatTest() {
    var success: Bool = false

    //  Demonstrates the Mime.ContainsSignedParts method, which returns whether the MIME tree contains a complete CMS/PKCS #7 signed entity.  It takes no arguments.

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

    if mime.containsSignedParts() {
        print("The message tree contains a signed part.")
    }
    else {
        print("The message tree contains no signed part.")
    }


}