Stripping Username (EAP-TLS)

[Sebastian Heil]

Hi,

i tried to strip the username with an attr_rewrite module:

radiusd.conf:
-----------------------------
authorize {
        ...
        testcut
        ...
        }

   
attr_rewrite testcut {
       attribute = User-Name
       searchfor = "host/"
       replacewith = ""
       }
------------------------------

Then i get an error, when starting radiusd -X

------------------------------
Config:   including file: /etc/raddb/proxy.conf
Config:   including file: /etc/raddb/clients.conf
Config:   including file: /etc/raddb/snmp.conf
Config:   including file: /etc/raddb/eap.conf
Config:   including file: /etc/raddb/sql.conf
 main: prefix = "/usr"
 main: localstatedir = "/var"
 main: logdir = "/var/log/radius"
 main: libdir = "/usr/lib/freeradius"
 main: radacctdir = "/var/log/radius/radacct"
 main: hostname_lookups = no
 main: max_request_time = 30
 main: cleanup_delay = 5
 main: max_requests = 1024
 main: delete_blocked_requests = 0
 main: port = 0
 main: allow_core_dumps = no
 main: log_stripped_names = no
 main: log_file = "/var/log/radius/radius.log"
 main: log_auth = yes
 main: log_auth_badpass = no
 main: log_auth_goodpass = no
 main: pidfile = "/var/run/radiusd/radiusd.pid"
 main: user = "radiusd"
 main: group = "radiusd"
 main: usercollide = no
 main: lower_user = "no"
 main: lower_pass = "no"
 main: nospace_user = "no"
 main: nospace_pass = "no"
 main: checkrad = "/usr/sbin/checkrad"
 main: proxy_requests = yes
 proxy: retry_delay = 5
 proxy: retry_count = 3
 proxy: synchronous = no
 proxy: default_fallback = yes
 proxy: dead_time = 120
 proxy: post_proxy_authorize = no
 proxy: wake_all_if_all_dead = no
 security: max_attributes = 200
 security: reject_delay = 1
 security: status_server = no
 main: debug_level = 0
read_config_files:  reading dictionary
read_config_files:  reading naslist
read_config_files:  reading clients
read_config_files:  reading realms
radiusd:  entering modules setup
Module: Library search path is /usr/lib/freeradius
Module: Loaded exec
 exec: wait = yes
 exec: program = "(null)"
 exec: input_pairs = "request"
 exec: output_pairs = "(null)"
 exec: packet_type = "(null)"
rlm_exec: Wait=yes but no output defined. Did you mean output=none?
Module: Instantiated exec (exec)
Module: Loaded expr
Module: Instantiated expr (expr)
Module: Loaded PAP
 pap: encryption_scheme = "crypt"
 pap: auto_header = yes
Module: Instantiated pap (pap)
Module: Loaded CHAP
Module: Instantiated chap (chap)
Module: Loaded MS-CHAP
 mschap: use_mppe = yes
 mschap: require_encryption = no
 mschap: require_strong = no
 mschap: with_ntdomain_hack = no
 mschap: passwd = "(null)"
 mschap: ntlm_auth = "(null)"
Module: Instantiated mschap (mschap)
Module: Loaded System
 unix: cache = no
 unix: passwd = "(null)"
 unix: shadow = "(null)"
 unix: group = "(null)"
 unix: radwtmp = "/var/log/radius/radwtmp"
 unix: usegroup = no
 unix: cache_reload = 600
Module: Instantiated unix (unix)
Module: Loaded eap
 eap: default_eap_type = "tls"
 eap: timer_expire = 60
 eap: ignore_unknown_eap_types = no
 eap: cisco_accounting_username_bug = no
 tls: rsa_key_exchange = no
 tls: dh_key_exchange = yes
 tls: rsa_key_length = 512
 tls: dh_key_length = 512
 tls: verify_depth = 0
 tls: CA_path = "(null)"
 tls: pem_file_type = yes
 tls: private_key_file = "/etc/raddb/certs/host.pem"
 tls: certificate_file = "/etc/raddb/certs/sl90001_chain.pem"
 tls: CA_file = "/etc/raddb/certs/test-ca.pem"
 tls: private_key_password = "(null)"
 tls: dh_file = "/etc/raddb/certs/dh"
 tls: random_file = "/etc/raddb/certs/random"
 tls: fragment_size = 1024
 tls: include_length = yes
 tls: check_crl = no
 tls: check_cert_cn = "%{User-Name}"
 tls: cipher_list = "(null)"
 tls: check_cert_issuer = "(null)"
rlm_eap_tls: Loading the certificate file as a chain
rlm_eap: Loaded and initialized type tls
 mschapv2: with_ntdomain_hack = no
rlm_eap: Loaded and initialized type mschapv2
Module: Instantiated eap (eap1)
Module: Loaded preprocess
 preprocess: huntgroups = "/etc/raddb/huntgroups"
 preprocess: hints = "/etc/raddb/hints"
 preprocess: with_ascend_hack = no
 preprocess: ascend_channels_per_line = 23
 preprocess: with_ntdomain_hack = no
 preprocess: with_specialix_jetstream_hack = no
 preprocess: with_cisco_vsa_hack = no
 preprocess: with_alvarion_vsa_hack = no
Module: Instantiated preprocess (preprocess)
Module: Loaded attr_rewrite
 attr_rewrite: attribute = "User-Name"
 attr_rewrite: searchfor = "host/"
 attr_rewrite: searchin = "packet"
 attr_rewrite: replacewith = ""
 attr_rewrite: append = no
 attr_rewrite: ignore_case = yes
 attr_rewrite: new_attribute = no
 attr_rewrite: max_matches = 10
Module: Instantiated attr_rewrite (testcut)
Module: Loaded detail
 detail: detailfile = "/var/log/radius/radacct/%{Client-IP-Address}/auth-detail-%Y%m%d"
 detail: detailperm = 384
 detail: dirperm = 493
 detail: locking = no
Module: Instantiated detail (auth_log)
Module: Loaded files
 files: usersfile = "/etc/raddb/users"
 files: acctusersfile = "/etc/raddb/acct_users"
 files: preproxy_usersfile = "/etc/raddb/preproxy_users"
 files: compat = "no"
Module: Instantiated files (files)
Module: Loaded Acct-Unique-Session-Id
 acct_unique: key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address, NAS-Port"
Module: Instantiated acct_unique (acct_unique)
Module: Loaded realm
 realm: format = "suffix"
 realm: delimiter = "@"
 realm: ignore_default = no
 realm: ignore_null = no
Module: Instantiated realm (suffix)
 detail: detailfile = "/var/log/radius/radacct/%{Client-IP-Address}/detail-%Y%m%d"
 detail: detailperm = 384
 detail: dirperm = 493
 detail: locking = no
Module: Instantiated detail (detail)
Module: Loaded radutmp
 radutmp: filename = "/var/log/radius/radutmp"
 radutmp: username = "%{User-Name}"
 radutmp: case_sensitive = yes
 radutmp: check_with_nas = yes
 radutmp: perm = 384
 radutmp: callerid = yes
Module: Instantiated radutmp (radutmp)
Listening on authentication *:1812
Listening on accounting *:1813
Ready to process requests.
rad_recv: Access-Request packet from host 10.230.30.214:1645, id=228, length=185
        User-Name = "host/cl00006"
        Service-Type = Framed-User
        Framed-MTU = 1500
        Called-Station-Id = "00-1A-E3-7E-03-84"
        Calling-Station-Id = "00-30-05-49-E9-8B"
        EAP-Message = 0x0202002801686f73742f636c30303030362e6f2d746573742e656f6e2d656e65726769652e6e6574
        Message-Authenticator = 0x4e1f71180c7d110bd7d5cf1b3fbf8d5a
        NAS-Port-Type = Ethernet
        NAS-Port = 50002
        NAS-IP-Address = 10.230.30.214
  Processing the authorize section of radiusd.conf
modcall: entering group authorize for request 0
  modcall[authorize]: module "preprocess" returns ok for request 0
radius_xlat:  'host/'
rlm_attr_rewrite: Changed value for attribute User-Name from 'host/cl00006' to 'cl00006'
  modcall[authorize]: module "testcut" returns ok for request 0
radius_xlat:  '/var/log/radius/radacct/10.230.30.214/auth-detail-20071026'
rlm_detail: /var/log/radius/radacct/%{Client-IP-Address}/auth-detail-%Y%m%d expands to /var/log/radius/radacct/10.230.30.214/auth-detail-20071026
  modcall[authorize]: module "auth_log" returns ok for request 0
  modcall[authorize]: module "chap" returns noop for request 0
  modcall[authorize]: module "mschap" returns noop for request 0
  rlm_eap: EAP packet type response id 2 length 40
  rlm_eap: No EAP Start, assuming it's an on-going EAP conversation
  modcall[authorize]: module "eap1" returns updated for request 0
  modcall[authorize]: module "files" returns notfound for request 0
rlm_pap: WARNING! No "known good" password found for the user.  Authentication may fail because of this.
  modcall[authorize]: module "pap" returns noop for request 0
modcall: leaving group authorize (returns updated) for request 0
  rad_check_password:  Found Auth-Type EAP
auth: type "EAP"
  Processing the authenticate section of radiusd.conf
modcall: entering group eap for request 0
rlm_eap: Identity does not match User-Name, setting from EAP Identity.
  rlm_eap: Failed in handler
  modcall[authenticate]: module "eap1" returns invalid for request 0
modcall: leaving group eap (returns invalid) for request 0
auth: Failed to validate the user.
Login incorrect: [cl00006] (from client cisco3560 port 50002 cli 00-30-05-49-E9-8B)
------------------------

Maybe, someone can help me?

Thanks.

Sebastian

> Hi everyone,
> 
> i am using Freeradius 1.1.7 on Suse Linux Enterprise 10.
> 
> I try to authenticate user with EAP-TLS. 
> Everything worked fine, until i activated the check of cert_cn.
> 
> eap.conf:
> 
> -------------------
> #  This check is done only if the previous
> #  "check_cert_issuer" is not set, or if
> #  the check succeeds.
> #
> check_cert_cn = %{User-Name}
> 
> -------------------
> 
> 
> The problem is, that the username looks like "host/cl00006" but the cn is
> "cl00006".
> 
> How can i strip the username?
> 
> Thanks for your help.
> 
> Kind regards
> Sebastian
> -- 
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