OpenCDK (Open Crypto Development Kit) provides basic parts of the OpenPGP message format. The aim of the library is *not* to replace any available OpenPGP version. There will be no real support for key management (sign, revoke, alter preferences, ...) and some other parts are only rudimentary available. The main purpose is to handle and understand OpenPGP packets and to use basic operations. For example to encrypt/decrypt or to sign/verify and packet routines.