External Authentication - Intranet

[cisco7970]

Hi,

Before I purchase vbulletin software, I would like to check with you guys to see if this product will meet my requirements. Our company has an intranet and I would like to minimize the user management administrator. Vbulletin will be sitting on public IP address. I would like to create a SSO process integrated to our intranet.

Actually what I would like to do is;

- I will install PGP on the server where vbulletin will be installed.
- Our Intranet will have a link to the vbulletin forum.
- Intranet server will encrypt a value with my public key and send this info to Vbulletin forum server.
- Vbulletin server will decrypt this with its private key and authenticate the user into the forum.
- If a user will go directly to the Vbulletin forum website, they will not be able to login. The only way will be passing through our Intranet.

May I accomplish this with Vbulletin or the source-codes are kind of locked which I cannot modify and play?

Thank you for letting me know,