I'm trying to setup EAP-PWD using FreeRADIUS 3.
However, I can't get it to work and documentation is virtually non-existent. Thus, I don't know whether the problem I'm running into is a misconfiguration or an actual bug.
Configuration
This is my configuration (at least the parts that are relevant):
mods-enabled/eap:
eap {
pwd {
#group = 19
server_id = example@example.com
# This has the same meaning as for TLS.
fragment_size = 1020
# The virtual server which determines the "known good" password for the user.
# Note that unlike TLS, only the "authorize" section is processed.
# EAP-PWD requests can be distinguished by having a User-Name, but no User-Password, CHAP-Password, EAP-Message, etc.
#virtual_server = "inner-tunnel"
}
I don't know what group = 19
is supposed to mean. (It's explained nowhere)
sites-enabled/default:
authorize {
filter_username
preprocess
# Look in an SQL database.
sql
#permit_only_eap
eap {
ok = return
}
logintime
}
authenticate {
# Allow EAP authentication.
eap
}
sites-enabled/inner-tunnel:
authorize {
eap {
ok = return
}
# Look in an SQL database.
sql
expiration
}
authenticate {
mschap
# Allow EAP authentication.
eap
}
Honestly, I don't understand if/why EAP-PWD needs a tunneled request anyway. I had it setup because I use PEAPv0/MS-CHAPv2 as well. I tried both virtual servers (default and inner-tunnel)
Problem
Well, the problem. I get authentication errors on the supplicant. This is what I see in the logs:
(2) eap: Peer sent method PWD (52)
(2) eap: EAP PWD (52)
(2) eap: Calling eap_pwd to process EAP data
(2) eap_pwd: Sending tunneled request
(2) eap_pwd: server default {
(2) # Executing section authorize from file /etc/freeradius/sites-enabled/default
(2) authorize {
(2) policy filter_username {
(2) if (!&User-Name) {
(2) if (!&User-Name) -> TRUE
(2) if (!&User-Name) {
(2) [noop] = noop
(2) } # if (!&User-Name) = noop
(2) if (&User-Name =~ / /) {
(2) ERROR: Failed retrieving values required to evaluate condition
(2) if (&User-Name =~ /@.*@/ ) {
(2) ERROR: Failed retrieving values required to evaluate condition
(2) if (&User-Name =~ /\.\./ ) {
(2) ERROR: Failed retrieving values required to evaluate condition
(2) if ((&User-Name =~ /@/) && (&User-Name !~ /@(.+)\.(.+)$/)) {
(2) ERROR: Failed retrieving values required to evaluate condition
(2) if (&User-Name =~ /\.$/) {
(2) ERROR: Failed retrieving values required to evaluate condition
(2) if (&User-Name =~ /@\./) {
(2) ERROR: Failed retrieving values required to evaluate condition
(2) } # policy filter_username = noop
(2) [preprocess] = ok
(2) sql: EXPAND %{User-Name}
(2) sql: -->
(2) sql: SQL-User-Name set to ''
rlm_sql (sql): Reserved connection (4)
(2) sql: EXPAND SELECT id, username, attribute, value, op FROM radcheck WHERE username = '%{SQL-User-Name}' ORDER BY id
(2) sql: --> SELECT id, username, attribute, value, op FROM radcheck WHERE username = '' ORDER BY id
(2) sql: Executing select query: SELECT id, username, attribute, value, op FROM radcheck WHERE username = '' ORDER BY id
(2) sql: EXPAND SELECT groupname FROM radusergroup WHERE username = '%{SQL-User-Name}' ORDER BY priority
(2) sql: --> SELECT groupname FROM radusergroup WHERE username = '' ORDER BY priority
(2) sql: Executing select query: SELECT groupname FROM radusergroup WHERE username = '' ORDER BY priority
(2) sql: User not found in any groups
rlm_sql (sql): Released connection (4)
(2) [sql] = notfound
(2) eap: No EAP-Message, not doing EAP
(2) [eap] = noop
(2) [logintime] = noop
(2) } # authorize = ok
(2) eap_pwd: } # server default
(2) eap_pwd: Got tunneled reply code 0
failed to find password for lars to do pwd authentication
(2) eap: ERROR: Failed continuing EAP PWD (52) session. EAP sub-module failed
(2) eap: Failed in EAP select
(2) [eap] = invalid
(2) } # authenticate = invalid
(2) Failed to authenticate the user
(2) Login incorrect (eap: Failed continuing EAP PWD (52) session. EAP sub-module failed): [lars] (from client LARS-RANNOCH port 4 cli 48-59-29-F6-BA-89)
The first authorize section (not shown in above log) went OK, but after that EAP-PWD seems to do another tunneled request. (why? I thought that was only necessary for PEAP and EAP-TTLS). In this case I had outcommented the "virtual-server"-line in the EAP config, so the request was handled by the default virtual server.
As can be seen, the User-Name attribute is empty (SQL-User-Name set to ''
), which results in the sql module not being able to fetch the correct record: failed to find password for lars to do pwd authentication
.
Is my configuration for EAP-PWD correct? What causes this error?