我正在尝试使用 FreeRADIUS 3 设置 EAP-PWD。
但是，我无法让它工作，而且文档几乎不存在。因此，我不知道我遇到的问题是配置错误还是实际错误。
配置
这是我的配置（至少是相关的部分）：
mods-enabled/eap：
eap {
pwd {
#group = 19
server_id = [email protected]
# 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"
}
我不知道这group = 19是什么意思。（没有任何地方解释）
站点启用/默认：
authorize {
filter_username
preprocess
# Look in an SQL database.
sql
#permit_only_eap
eap {
ok = return
}
logintime
}
authenticate {
# Allow EAP authentication.
eap
}
已启用站点/内部隧道：
authorize {
eap {
ok = return
}
# Look in an SQL database.
sql
expiration
}
authenticate {
mschap
# Allow EAP authentication.
eap
}
说实话，我不明白 EAP-PWD 是否/为什么需要隧道请求。我之所以设置它，是因为我也使用 PEAPv0/MS-CHAPv2。我尝试了两个虚拟服务器（默认和内部隧道）
问题
好了，问题来了。我在请求方上遇到了身份验证错误。这是我在日志中看到的内容：
(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)
第一个授权部分（未显示在上述日志中）运行正常，但此后 EAP-PWD 似乎又发出了另一个隧道请求。（为什么？我认为这只对 PEAP 和 EAP-TTLS 是必要的）。在这种情况下，我在 EAP 配置中注释掉了“虚拟服务器”行，因此请求由默认虚拟服务器处理。
可以看出，用户名属性为空（SQL-User-Name set to ''），导致 sql 模块无法获取正确的记录：failed to find password for lars to do pwd authentication。
我的 EAP-PWD 配置正确吗？是什么导致了此错误？