VRDPAUTH external on ubuntu hardy host

[Samuel Monsarrat]

VirtualBox 2.0.2.

I am unable to get the standard external vrdp authentication working on Ubuntu 8.04.

In the VB logs I get:

00:00:44.533 VRDP: Logon: kelisport06 (192.168.1.10) build 2600. User: [sam] Domain: [] Screen: 0
00:00:44.534 VRDPAUTH: User: [sam]. Domain: []. Authentication type: [External]
00:00:44.535 VRDPAUTH: ConsoleVRDPServer::Authenticate: loading external authentication library'VRDPAuth'
00:00:44.535 VRDPAUTH: Could not resolve import 'VRDPAuth2'. Error code: VERR_SYMBOL_NOT_FOUND
00:00:44.535 VRDPAUTH: Using entry point 'VRDPAuth'.
00:00:44.584 VRDPAUTH: external authentication module returned 'access denied'
00:00:44.584 VRDPAUTH: Access denied.

I exported:

export VRDP_AUTH_DEBUG_FILENAME=/tmp/vbox_auth.log

And tried again, /tmp/vbox_auth.log gave me:

u[sam], d[], p[8]
vrdpauth_pam_init: dlopen libpam.so failed
vrdpauth_pam_init failed 4

This looks like VRDPAuth.so is linking to a non existent lib, indeed on hardy /lib/libpam.so does NOT exist, only /lib/libpam.so.0, I then did :

$ sudo ln -s /lib/libpam.so.0 /lib/libpam.so

And tried again, this time /tmp/vbox_auth.log gave me:

u[sam], d[], p[8]
init ok
Using PAM service: login
start ok
conv: num 1 u[sam] p[8]
conv: 0 returning password [8]
auth ok
pam_acct_mgmt failed 9. Authentication service cannot retrieve authentication info
vrdpauth_pam_close completed

This is where I get stuck. it seems that VRDPAuth.so is NOT compatible with PAM on ubuntu 8.08 What is happening?