How to escape values in radclient?

[rany]

Hi,

I am planning on using radclient in a quick authentication script until 
I could fix an authentication library. I thought of using radclient in a 
shell script for the authentication task as it seemed fairly simple, 
however I wasn't able to figure out how to escape values that are set by 
the user; namely User-Name and User-Password.

I tried checking the manual page but I haven't had any luck with that. 
It doesn't seem to have been mentioned, but I'm fairly sure this 
scenario was considered.

TIA,
rany