Question about authentication

[matteo]

Hello list,
suppose I want to authenticate a device capable of using PEAP with 
EAP-MS-CHAP v2 or EAP-GTC and TTLS with EAP-MS-CHAP v2 or MS-CHAPv2 and 
I have user password stored in LDAP (linux) with the crypt scheme and 
freeradius server 2.1.9.
Is there any mechanism to successfully authenticate the client? for 
example getting user password from ldap, and comparing with the one in 
the request packet (previously encrypted)?
Thanks in advance.
Matteo