In example.pl perl script $RAD_REQUEST{'User-Name'} returns the username of the EAP request message. How can I get the password of the
EAP request? $RAD_REQUEST{'User-Password'} won't return the password.

[<Tim>] You can’t. RADIUS Access-Request packets that use EAP do not send the password to the RADIUS server. The only attributes you can access are the ones sent in the RADIUS request, which are listed below in the debug output.

rad_recv: Access-Request packet from host 24.26.79.31 port 50168, id=207, length=185
        User-Name = "test"
        NAS-IP-Address = 10.0.0.31
        NAS-Identifier = "belair"
        NAS-Port = 0
        Called-Station-Id = "00-0D-67-12-15-80:SSO_BelAir-PMIP-8021x"
        Calling-Station-Id = "00-26-4A-FC-EB-B2"
        Framed-MTU = 1400
        NAS-Port-Type = Wireless-802.11
        Connect-Info = "CONNECT 11Mbps 802.11b"
        EAP-Message = 0x020100060319
        State = 0xce81437fce8047c9464d6ff62d386d00
        Message-Authenticator = 0x5feafac09a6cce51d36958efc628f397