Need an AS2 (Applicability Standard 2) Message Sender and Receiver for EDI (electronic data interchange) transactions. Must be C#; Code must be Visible/I.e no custom dlls only registered Nuget packages. Will use in Web Application. Must be able to Send, Receive Encrypted and Signed Messages and MDN.
Specifically, I need help with the encryption/decryption and signing components. Given a Public Key/Certificate, need help decrypting the message.