CHAP password using perl

[Saeed Akhtar]

Hi all,
   I wrote a code in perl to calculate remaining time using my own database.
for authentication I used User-Password attribute. but then I tested it with
real NAS server and I realized that I haven't catered CHAP password. Now I
want to ask that if there any module which convert CHAP password to
user-password feild or there is any way to integrate CHAP password module in
perl code. Means I want to authenticate CHAP password through my own perl
code, how will I do it.
  I'll be thankful for any help
Regards,

Saeed Akhtar
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