Hello. I have some trouble to call an external authentication script in freeradius.
I want to use MOTP for authentication. MOTP uses a shell-script (/usr/local/bin/otpverify.sh) to verify the given password. The script needs five arguments (User, One-Time-Password, Secret, PIN and Offset). My system is a fresh installation of freeradius on a Debian/Lenny system. I did the following changes on the following config-files: 1. A new dictionary-file (included in /etc/freeradius/dictionary): /etc/freeradius/dictionary.motp ------------------------------- ATTRIBUTE Secret 960 string ATTRIBUTE PIN 961 string ATTRIBUTE Offset 962 string 2. A new module in /etc/freeradius/radiusd.conf (modules-section): ---------------------------- [...] exec motp { wait = yes program = "/usr/local/bin/otpverify.sh %{User-Name} %{User-Password} %{Secret} %{PIN} %{Offset}" input_pairs = request output_pairs = config } [...] 3. /etc/freeradius/sites-enabled/default (section authenticate) ------------------------------------- [...] Auth-Type MOTP { motp } 4. /etc/freeradius/users --------------------- DEFAULT Auth-Type = Accept Exec-Program-Wait = "/usr/local/bin/otpverify.sh '%{User-Name}' '%{User-Password}' '%{Secret}' '%{PIN}' '%{Offset}'", Fall-Through = Yes stefan Secret = 143a5c6fa125ac1f, PIN = 1234, Offset = 0 The main-problem is: freeradius didn't call the script with all the needed arguments - so the authentication failes: [...] expand: /usr/local/bin/otpverify.sh '%{User-Name}' '%{User-Password}' '%{Secret}' '%{PIN}' '%{Offset}' -> /usr/local/bin/otpverify.sh 'stefan' '123' '' '' '' [...] Can anybody tell me where I did the mistake in my configuration ?? Thanks a lot Stefan P.S. Here is the complete debugging output: FreeRADIUS Version 2.0.4, for host x86_64-pc-linux-gnu, built on Sep 7 2008 at 17:42:33 Copyright (C) 1999-2008 The FreeRADIUS server project and contributors. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. You may redistribute copies of FreeRADIUS under the terms of the GNU General Public License. Starting - reading configuration files ... including configuration file /etc/freeradius/radiusd.conf including configuration file /etc/freeradius/proxy.conf including configuration file /etc/freeradius/clients.conf including configuration file /etc/freeradius/snmp.conf including configuration file /etc/freeradius/eap.conf including configuration file /etc/freeradius/policy.conf including files in directory /etc/freeradius/sites-enabled/ including configuration file /etc/freeradius/sites-enabled/default including configuration file /etc/freeradius/sites-enabled/inner-tunnel including dictionary file /etc/freeradius/dictionary main { prefix = "/usr" localstatedir = "/var" logdir = "/var/log/freeradius" libdir = "/usr/lib/freeradius" radacctdir = "/var/log/freeradius/radacct" hostname_lookups = no max_request_time = 30 cleanup_delay = 5 max_requests = 1024 allow_core_dumps = no pidfile = "/var/run/freeradius/freeradius.pid" user = "freerad" group = "freerad" checkrad = "/usr/sbin/checkrad" debug_level = 0 proxy_requests = yes security { max_attributes = 200 reject_delay = 1 status_server = yes } } client localhost { ipaddr = 127.0.0.1 require_message_authenticator = no secret = "testing123" nastype = "other" } client 192.168.82.41 { require_message_authenticator = no secret = "testing123" } client 192.168.82.40 { require_message_authenticator = no secret = "testing123" } radiusd: #### Loading Realms and Home Servers #### proxy server { retry_delay = 5 retry_count = 3 default_fallback = no dead_time = 120 wake_all_if_all_dead = no } home_server localhost { ipaddr = 127.0.0.1 port = 1812 type = "auth" secret = "testing123" response_window = 20 max_outstanding = 65536 zombie_period = 40 status_check = "status-server" ping_check = "none" ping_interval = 30 check_interval = 30 num_answers_to_alive = 3 num_pings_to_alive = 3 revive_interval = 120 status_check_timeout = 4 } home_server_pool my_auth_failover { type = fail-over home_server = localhost } realm example.com { auth_pool = my_auth_failover } realm LOCAL { } radiusd: #### Instantiating modules #### instantiate { Module: Linked to module rlm_exec Module: Instantiating exec exec { wait = yes input_pairs = "request" shell_escape = yes } Module: Linked to module rlm_expr Module: Instantiating expr Module: Linked to module rlm_expiration Module: Instantiating expiration expiration { reply-message = "Password Has Expired " } Module: Linked to module rlm_logintime Module: Instantiating logintime logintime { reply-message = "You are calling outside your allowed timespan " minimum-timeout = 60 } } radiusd: #### Loading Virtual Servers #### server inner-tunnel { modules { Module: Checking authenticate {...} for more modules to load Module: Instantiating motp exec motp { wait = yes program = "/usr/local/bin/otpverify.sh %{User-Name} %{User-Password} %{Secret} %{PIN} %{Offset}" input_pairs = "request" output_pairs = "config" shell_escape = yes } Module: Linked to module rlm_pap Module: Instantiating pap pap { encryption_scheme = "auto" auto_header = no } Module: Linked to module rlm_chap Module: Instantiating chap Module: Linked to module rlm_mschap Module: Instantiating mschap mschap { use_mppe = yes require_encryption = no require_strong = no with_ntdomain_hack = no } Module: Linked to module rlm_unix Module: Instantiating unix unix { radwtmp = "/var/log/freeradius/radwtmp" } Module: Linked to module rlm_eap Module: Instantiating eap eap { default_eap_type = "md5" timer_expire = 60 ignore_unknown_eap_types = no cisco_accounting_username_bug = no } Module: Linked to sub-module rlm_eap_md5 Module: Instantiating eap-md5 Module: Linked to sub-module rlm_eap_leap Module: Instantiating eap-leap Module: Linked to sub-module rlm_eap_gtc Module: Instantiating eap-gtc gtc { challenge = "Password: " auth_type = "PAP" } rlm_eap: Ignoring EAP-Type/tls because we do not have OpenSSL support. rlm_eap: Ignoring EAP-Type/ttls because we do not have OpenSSL support. rlm_eap: Ignoring EAP-Type/peap because we do not have OpenSSL support. Module: Linked to sub-module rlm_eap_mschapv2 Module: Instantiating eap-mschapv2 mschapv2 { with_ntdomain_hack = no } Module: Checking authorize {...} for more modules to load Module: Linked to module rlm_realm Module: Instantiating suffix realm suffix { format = "suffix" delimiter = "@" ignore_default = no ignore_null = no } Module: Linked to module rlm_files Module: Instantiating files files { usersfile = "/etc/freeradius/users" acctusersfile = "/etc/freeradius/acct_users" preproxy_usersfile = "/etc/freeradius/preproxy_users" compat = "no" } Module: Checking session {...} for more modules to load Module: Linked to module rlm_radutmp Module: Instantiating radutmp radutmp { filename = "/var/log/freeradius/radutmp" username = "%{User-Name}" case_sensitive = yes check_with_nas = yes perm = 384 callerid = yes } Module: Checking post-proxy {...} for more modules to load Module: Checking post-auth {...} for more modules to load Module: Linked to module rlm_attr_filter Module: Instantiating attr_filter.access_reject attr_filter attr_filter.access_reject { attrsfile = "/etc/freeradius/attrs.access_reject" key = "%{User-Name}" } } } server { modules { Module: Checking authenticate {...} for more modules to load Module: Checking authorize {...} for more modules to load Module: Linked to module rlm_preprocess Module: Instantiating preprocess preprocess { huntgroups = "/etc/freeradius/huntgroups" hints = "/etc/freeradius/hints" with_ascend_hack = no ascend_channels_per_line = 23 with_ntdomain_hack = no with_specialix_jetstream_hack = no with_cisco_vsa_hack = no with_alvarion_vsa_hack = no } Module: Checking preacct {...} for more modules to load Module: Linked to module rlm_acct_unique Module: Instantiating acct_unique acct_unique { key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address, NAS-Port" } Module: Checking accounting {...} for more modules to load Module: Linked to module rlm_detail Module: Instantiating detail detail { detailfile = "/var/log/freeradius/radacct/%{Client-IP-Address}/detail-%Y%m%d" header = "%t" detailperm = 384 dirperm = 493 locking = no log_packet_header = no } Module: Instantiating attr_filter.accounting_response attr_filter attr_filter.accounting_response { attrsfile = "/etc/freeradius/attrs.accounting_response" key = "%{User-Name}" } Module: Checking session {...} for more modules to load Module: Checking post-proxy {...} for more modules to load Module: Checking post-auth {...} for more modules to load } } radiusd: #### Opening IP addresses and Ports #### listen { type = "auth" ipaddr = * port = 0 } listen { type = "acct" ipaddr = * port = 0 } main { snmp = no smux_password = "" snmp_write_access = no } Listening on authentication address * port 1812 Listening on accounting address * port 1813 Listening on proxy address * port 1814 Ready to process requests. rad_recv: Access-Request packet from host 192.168.82.40 port 1026, id=43, length=78 User-Name = "stefan" User-Password = "123" Service-Type = Authenticate-Only NAS-Identifier = "ubuntu.kuegler.org" NAS-IP-Address = 192.168.82.40 +- entering group authorize ++[preprocess] returns ok ++[chap] returns noop ++[mschap] returns noop rlm_realm: No '@' in User-Name = "stefan", looking up realm NULL rlm_realm: No such realm "NULL" ++[suffix] returns noop rlm_eap: No EAP-Message, not doing EAP ++[eap] returns noop ++[unix] returns updated users: Matched entry DEFAULT at line 2 expand: /usr/local/bin/otpverify.sh '%{User-Name}' '%{User-Password}' '%{Secret}' '%{PIN}' '%{Offset}' -> /usr/local/bin/otpverify.sh 'stefan' '123' '' '' '' users: Matched entry stefan at line 9 ++[files] returns ok ++[expiration] returns noop ++[logintime] returns noop rlm_pap: Found existing Auth-Type, not changing it. ++[pap] returns noop rad_check_password: Found Auth-Type Accept rad_check_password: Auth-Type = Accept, accepting the user Login OK: [stefan/123] (from client 192.168.82.40 port 0) +- entering group post-auth Exec-Program output: FAIL Exec-Program-Wait: plaintext: FAIL Exec-Program: returned: 3 Login incorrect (external check said so) ++[exec] returns reject Found Post-Auth-Type Reject +- entering group REJECT expand: %{User-Name} -> stefan attr_filter: Matched entry DEFAULT at line 11 ++[attr_filter.access_reject] returns updated Delaying reject of request 0 for 1 seconds Going to the next request Waking up in 0.9 seconds. rad_recv: Access-Request packet from host 192.168.82.40 port 1026, id=43, length=78 Waiting to send Access-Reject to client 192.168.82.40 port 1026 - ID: 43 Sending delayed reject for request 0 Sending Access-Reject of id 43 to 192.168.82.40 port 1026 Waking up in 4.9 seconds. - List info/subscribe/unsubscribe? 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