[Openswan Users] Implementing proprietary cipher in Openswan

[Mihajlo Cvetanović]

I would like to implement my own proprietary cipher, so I guess the most 
apropriate method is to implement it into something called CryptoApi (of 
which I don't know anything about at the moment). Could somebody give me 
some useful hints & links to get me started? I would need help both on 
CryptoApi implementation, and integration with Openswan. I'm working 
with FC5 2.6.15, ipsec 2.4.5 (klips). Thanks in advance.