LDAP without a User-Password (2.1.8)

29 Apr 2010

      Hi,
    I have a requirement for 'authentication' via LDAP.  Only a User-Name is passed to freeradius.  
The requirement is to perform an LDAP lookup, and if the user exists, return a couple of other values in the LDAP database for that user.
If the user does not exist, reject.

I have the LDAP lookups working, but I cannot figure out how to tell freeradius to skip the password check (authorization?).

I am using radcleint to test this via,
    echo "User-Name=2975600001" | /usr/local/bin/radclient -s 127.0.0.1 auth testing123

Below is a debug of this test.

FreeRADIUS Version 2.1.8, for host i686-pc-linux-gnu, built on Apr 27 2010 at 14:45:30
Copyright (C) 1999-2009 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 v2. 
Starting - reading configuration files ...
including configuration file /usr/local/etc/raddb/radiusd.conf
including configuration file /usr/local/etc/raddb/proxy.conf
including configuration file /usr/local/etc/raddb/clients.conf
including files in directory /usr/local/etc/raddb/modules/
including configuration file /usr/local/etc/raddb/modules/echo
including configuration file /usr/local/etc/raddb/modules/inner-eap
including configuration file /usr/local/etc/raddb/modules/logintime
including configuration file /usr/local/etc/raddb/modules/perl
including configuration file /usr/local/etc/raddb/modules/cui
including configuration file /usr/local/etc/raddb/modules/expr
including configuration file /usr/local/etc/raddb/modules/smsotp
including configuration file /usr/local/etc/raddb/modules/pap
including configuration file /usr/local/etc/raddb/modules/sql_log
including configuration file /usr/local/etc/raddb/modules/mschap
including configuration file /usr/local/etc/raddb/modules/sqlcounter_expire_on_login
including configuration file /usr/local/etc/raddb/modules/digest
including configuration file /usr/local/etc/raddb/modules/policy
including configuration file /usr/local/etc/raddb/modules/preprocess
including configuration file /usr/local/etc/raddb/modules/krb5
including configuration file /usr/local/etc/raddb/modules/detail
including configuration file /usr/local/etc/raddb/modules/always
including configuration file /usr/local/etc/raddb/modules/exec
including configuration file /usr/local/etc/raddb/modules/mac2vlan
including configuration file /usr/local/etc/raddb/modules/unix
including configuration file /usr/local/etc/raddb/modules/realm
including configuration file /usr/local/etc/raddb/modules/wimax
including configuration file /usr/local/etc/raddb/modules/acct_unique
including configuration file /usr/local/etc/raddb/modules/otp
including configuration file /usr/local/etc/raddb/modules/expiration
including configuration file /usr/local/etc/raddb/modules/detail.example.com
including configuration file /usr/local/etc/raddb/modules/pam
including configuration file /usr/local/etc/raddb/modules/checkval
including configuration file /usr/local/etc/raddb/modules/ntlm_auth
including configuration file /usr/local/etc/raddb/modules/smbpasswd
including configuration file /usr/local/etc/raddb/modules/chap
including configuration file /usr/local/etc/raddb/modules/mac2ip
including configuration file /usr/local/etc/raddb/modules/radutmp
including configuration file /usr/local/etc/raddb/modules/ippool
including configuration file /usr/local/etc/raddb/modules/ldap
including configuration file /usr/local/etc/raddb/modules/linelog
including configuration file /usr/local/etc/raddb/modules/sradutmp
including configuration file /usr/local/etc/raddb/modules/attr_filter
including configuration file /usr/local/etc/raddb/modules/passwd
including configuration file /usr/local/etc/raddb/modules/detail.log
including configuration file /usr/local/etc/raddb/modules/etc_group
including configuration file /usr/local/etc/raddb/modules/files
including configuration file /usr/local/etc/raddb/modules/ldap.orig
including configuration file /usr/local/etc/raddb/modules/attr_rewrite
including configuration file /usr/local/etc/raddb/modules/counter
including configuration file /usr/local/etc/raddb/eap.conf
including configuration file /usr/local/etc/raddb/policy.conf
including files in directory /usr/local/etc/raddb/sites-enabled/
including configuration file /usr/local/etc/raddb/sites-enabled/default
including configuration file /usr/local/etc/raddb/sites-enabled/inner-tunnel
including configuration file /usr/local/etc/raddb/sites-enabled/control-socket
main {
        user = "radiusd"
        group = "radiusd"
        allow_core_dumps = no
}
including dictionary file /usr/local/etc/raddb/dictionary
main {
        prefix = "/usr/local"
        localstatedir = "/var"
        logdir = "/var/log/radius"
        libdir = "/usr/local/lib"
        radacctdir = "/var/log/radius/radacct"
        hostname_lookups = no
        max_request_time = 30
        cleanup_delay = 5
        max_requests = 1024
        pidfile = "/var/run/radiusd/radiusd.pid"
        checkrad = "/usr/local/sbin/checkrad"
        debug_level = 0
        proxy_requests = yes
 log {
        stripped_names = no
        auth = no
        auth_badpass = no
        auth_goodpass = no
 }
 security {
        max_attributes = 200
        reject_delay = 1
        status_server = yes
 }
}
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
        require_message_authenticator = no
        zombie_period = 40
        status_check = "status-server"
        ping_interval = 30
        check_interval = 30
        num_answers_to_alive = 3
        num_pings_to_alive = 3
        revive_interval = 120
        status_check_timeout = 4
        irt = 2
        mrt = 16
        mrc = 5
        mrd = 30
 }
 home_server_pool my_auth_failover {
        type = fail-over
        home_server = localhost
 }
 realm example.com {
        auth_pool = my_auth_failover
 }
 realm LOCAL {
 }
radiusd: #### Loading Clients ####
 client localhost {
        ipaddr = 127.0.0.1
        require_message_authenticator = no
        secret = "testing123"
        shortname = "localhost"
        nastype = "other"
 }
 client 172.16.1.218 {
        require_message_authenticator = no
        secret = "somecompanysecret"
        shortname = "GGSN-radius-1"
 }
 client 172.16.1.222 {
        require_message_authenticator = no
        secret = "somecompanysecret"
        shortname = "GGSN-radius-2"
 }
radiusd: #### Instantiating modules ####
 instantiate {
 Module: Linked to module rlm_exec
 Module: Instantiating exec
  exec {
        wait = no
        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: 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/radius/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
        max_sessions = 4096
  }
 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"
   }
 Module: Linked to sub-module rlm_eap_tls
 Module: Instantiating eap-tls
   tls {
        rsa_key_exchange = no
        dh_key_exchange = yes
        rsa_key_length = 512
        dh_key_length = 512
        verify_depth = 0
        pem_file_type = yes
        private_key_file = "/usr/local/etc/raddb/certs/server.pem"
        certificate_file = "/usr/local/etc/raddb/certs/server.pem"
        CA_file = "/usr/local/etc/raddb/certs/ca.pem"
        private_key_password = "whatever"
        dh_file = "/usr/local/etc/raddb/certs/dh"
        random_file = "/usr/local/etc/raddb/certs/random"
        fragment_size = 1024
        include_length = yes
        check_crl = no
        cipher_list = "DEFAULT"
        make_cert_command = "/usr/local/etc/raddb/certs/bootstrap"
    cache {
        enable = no
        lifetime = 24
        max_entries = 255
    }
   }
 Module: Linked to sub-module rlm_eap_ttls
 Module: Instantiating eap-ttls
   ttls {
        default_eap_type = "md5"
        copy_request_to_tunnel = no
        use_tunneled_reply = no
        virtual_server = "inner-tunnel"
        include_length = yes
   }
 Module: Linked to sub-module rlm_eap_peap
 Module: Instantiating eap-peap
   peap {
        default_eap_type = "mschapv2"
        copy_request_to_tunnel = no
        use_tunneled_reply = no
        proxy_tunneled_request_as_eap = yes
        virtual_server = "inner-tunnel"
   }
 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 = "/usr/local/etc/raddb/users"
        acctusersfile = "/usr/local/etc/raddb/acct_users"
        preproxy_usersfile = "/usr/local/etc/raddb/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/radius/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 = "/usr/local/etc/raddb/attrs.access_reject"
        key = "%{User-Name}"
  }
 } # modules
} # server
server {
 modules {
 Module: Checking authenticate {...} for more modules to load
 Module: Linked to module rlm_ldap
 Module: Instantiating ldap
  ldap {
        server = "172.16.1.52"
        port = 389
        password = "secretpassword"
        identity = "cn=secretpassword"
        net_timeout = 1
        timeout = 4
        timelimit = 3
        tls_mode = no
        start_tls = no
        tls_require_cert = "allow"
   tls {
        start_tls = no
        require_cert = "allow"
   }
        basedn = "ou=People,o=SOMECOMPANY  ,o=somecompanynetwork"
        filter = "(&(uid=%{%{Stripped-User-Name}:-%{User-Name}}) (ntlRadiusStatus=Active) (inetUserStatus=Active) )"
        base_filter = "(objectclass=radiusprofile)"
        auto_header = no
        access_attr_used_for_allow = yes
        groupname_attribute = "cn"
        groupmembership_filter = "(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))"
        dictionary_mapping = "/usr/local/etc/raddb/ldap.attrmap"
        ldap_debug = 0
        ldap_connections_number = 5
        compare_check_items = no
        do_xlat = yes
        set_auth_type = yes
  }
rlm_ldap: Registering ldap_groupcmp for Ldap-Group
rlm_ldap: Registering ldap_xlat with xlat_name ldap
rlm_ldap: reading ldap<->radius mappings from file /usr/local/etc/raddb/ldap.attrmap
rlm_ldap: LDAP radiusCheckItem mapped to RADIUS $GENERIC$
rlm_ldap: LDAP radiusReplyItem mapped to RADIUS $GENERIC$
rlm_ldap: LDAP radiusAuthType mapped to RADIUS Auth-Type
rlm_ldap: LDAP radiusSimultaneousUse mapped to RADIUS Simultaneous-Use
rlm_ldap: LDAP radiusCalledStationId mapped to RADIUS Called-Station-Id
rlm_ldap: LDAP radiusCallingStationId mapped to RADIUS Calling-Station-Id
rlm_ldap: LDAP lmPassword mapped to RADIUS LM-Password
rlm_ldap: LDAP ntPassword mapped to RADIUS NT-Password
rlm_ldap: LDAP sambaLmPassword mapped to RADIUS LM-Password
rlm_ldap: LDAP sambaNtPassword mapped to RADIUS NT-Password
rlm_ldap: LDAP dBCSPwd mapped to RADIUS LM-Password
rlm_ldap: LDAP acctFlags mapped to RADIUS SMB-Account-CTRL-TEXT
rlm_ldap: LDAP radiusExpiration mapped to RADIUS Expiration
rlm_ldap: LDAP radiusNASIpAddress mapped to RADIUS NAS-IP-Address
rlm_ldap: LDAP radiusServiceType mapped to RADIUS Service-Type
rlm_ldap: LDAP radiusFramedProtocol mapped to RADIUS Framed-Protocol
rlm_ldap: LDAP radiusFramedIPAddress mapped to RADIUS Framed-IP-Address
rlm_ldap: LDAP radiusFramedIPNetmask mapped to RADIUS Framed-IP-Netmask
rlm_ldap: LDAP radiusFramedRoute mapped to RADIUS Framed-Route
rlm_ldap: LDAP radiusFramedRouting mapped to RADIUS Framed-Routing
rlm_ldap: LDAP radiusFilterId mapped to RADIUS Filter-Id
rlm_ldap: LDAP radiusFramedMTU mapped to RADIUS Framed-MTU
rlm_ldap: LDAP radiusFramedCompression mapped to RADIUS Framed-Compression
rlm_ldap: LDAP radiusLoginIPHost mapped to RADIUS Login-IP-Host
rlm_ldap: LDAP radiusLoginService mapped to RADIUS Login-Service
rlm_ldap: LDAP radiusLoginTCPPort mapped to RADIUS Login-TCP-Port
rlm_ldap: LDAP radiusCallbackNumber mapped to RADIUS Callback-Number
rlm_ldap: LDAP radiusCallbackId mapped to RADIUS Callback-Id
rlm_ldap: LDAP radiusFramedIPXNetwork mapped to RADIUS Framed-IPX-Network
rlm_ldap: LDAP radiusClass mapped to RADIUS Class
rlm_ldap: LDAP radiusSessionTimeout mapped to RADIUS Session-Timeout
rlm_ldap: LDAP radiusIdleTimeout mapped to RADIUS Idle-Timeout
rlm_ldap: LDAP radiusTerminationAction mapped to RADIUS Termination-Action
rlm_ldap: LDAP radiusLoginLATService mapped to RADIUS Login-LAT-Service
rlm_ldap: LDAP radiusLoginLATNode mapped to RADIUS Login-LAT-Node
rlm_ldap: LDAP radiusLoginLATGroup mapped to RADIUS Login-LAT-Group
rlm_ldap: LDAP radiusFramedAppleTalkLink mapped to RADIUS Framed-AppleTalk-Link
rlm_ldap: LDAP radiusFramedAppleTalkNetwork mapped to RADIUS Framed-AppleTalk-Network
rlm_ldap: LDAP radiusFramedAppleTalkZone mapped to RADIUS Framed-AppleTalk-Zone
rlm_ldap: LDAP radiusPortLimit mapped to RADIUS Port-Limit
rlm_ldap: LDAP radiusLoginLATPort mapped to RADIUS Login-LAT-Port
rlm_ldap: LDAP radiusReplyMessage mapped to RADIUS Reply-Message
rlm_ldap: LDAP radiusTunnelType mapped to RADIUS Tunnel-Type
rlm_ldap: LDAP radiusTunnelMediumType mapped to RADIUS Tunnel-Medium-Type
rlm_ldap: LDAP radiusTunnelPrivateGroupId mapped to RADIUS Tunnel-Private-Group-Id
rlm_ldap: LDAP ntlradiusglobalprofileref mapped to RADIUS Profile
rlm_ldap: LDAP userPassword mapped to RADIUS Password
conns: 0x9711090
 Module: Checking authorize {...} for more modules to load
 Module: Linked to module rlm_preprocess
 Module: Instantiating preprocess
  preprocess {
        huntgroups = "/usr/local/etc/raddb/huntgroups"
        hints = "/usr/local/etc/raddb/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/radius/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 = "/usr/local/etc/raddb/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
 } # modules
} # server
radiusd: #### Opening IP addresses and Ports ####
listen {
        type = "auth"
        ipaddr = *
        port = 0
}
listen {
        type = "acct"
        ipaddr = *
        port = 0
}
listen {
        type = "control"
 listen {
        socket = "/var/run/radiusd/radiusd.sock"
 }
}
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on command file /var/run/radiusd/radiusd.sock
Listening on proxy address * port 1814
Ready to process requests.
rad_recv: Access-Request packet from host 127.0.0.1 port 59607, id=163, length=32
        User-Name = "SomeUser"
+- entering group authorize {...}
++[preprocess] returns ok
++[chap] returns noop
++[mschap] returns noop
[suffix] No '@' in User-Name = "SomeUser", looking up realm NULL
[suffix] No such realm "NULL"
++[suffix] returns noop
[eap] No EAP-Message, not doing EAP
++[eap] returns noop
++[unix] returns notfound
++[files] returns noop
[ldap] performing user authorization for SomeUser
[ldap]  expand: %{Stripped-User-Name} -> 
[ldap]  ... expanding second conditional
[ldap]  expand: %{User-Name} -> SomeUser
[ldap]  expand: (&(uid=%{%{Stripped-User-Name}:-%{User-Name}}) (ntlRadiusStatus=Active) (inetUserStatus=Active) ) -> (&(uid=SomeUser) (ntlRadiusStatus=Active) (inetUserStatus=Active) )
[ldap]  expand: ou=People,o=SOMECOMPANY  ,o=somecompanynetwork -> ou=People,o=SOMECOMPANY  ,o=somecompanynetwork
  [ldap] ldap_get_conn: Checking Id: 0
  [ldap] ldap_get_conn: Got Id: 0
  [ldap] attempting LDAP reconnection
  [ldap] (re)connect to 172.16.1.52:389, authentication 0
  [ldap] bind as cn=secretpassword/secretpassword to 172.16.1.52:389
  [ldap] waiting for bind result ...
  [ldap] Bind was successful
  [ldap] performing search in ou=People,o=SOMECOMPANY  ,o=somecompanynetwork, with filter (&(uid=SomeUser) (ntlRadiusStatus=Active) (inetUserStatus=Active) )
[ldap] looking for check items in directory...
[ldap] looking for reply items in directory...
  [ldap] userPassword -> Password = "{SHA}rEtSjRgLo/JjdB2mc+QZbBYDxNU="
  [ldap] ntlradiusglobalprofileref -> Profile = "cn=prepaid,ou=Profiles,ou=Radius,ou=IP Services, o=SOMECOMPANY, o=somecompanynetwork"
WARNING: No "known good" password was found in LDAP.  Are you sure that the user is configured correctly?
[ldap] user SomeUser authorized to use remote access
  [ldap] ldap_release_conn: Release Id: 0
++[ldap] returns ok
++[expiration] returns noop
++[logintime] returns noop
[pap] WARNING! No "known good" password found for the user.  Authentication may fail because of this.
++[pap] returns noop
No authenticate method (Auth-Type) configuration found for the request: Rejecting the user
Failed to authenticate the user.
Using Post-Auth-Type Reject
+- entering group REJECT {...}
[attr_filter.access_reject]     expand: %{User-Name} -> SomeUser
 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.
Sending delayed reject for request 0
Sending Access-Reject of id 163 to 127.0.0.1 port 59607
Waking up in 4.9 seconds.
Cleaning up request 0 ID 163 with timestamp +8
Ready to process requests.

--------------------------------------------------------------------------------
Craig Campbell 
craig.campbell@ccraft.ca 
CampbellCraft Consulting Inc
2 Kenny Court 
Whitby, Ontario 
Canada 
L1R 2L8 
905 922-2789 

__________ Information from ESET Smart Security, version of virus signature database 5072 (20100429) __________

The message was checked by ESET Smart Security.

http://www.eset.com

__________ Information from ESET Smart Security, version of virus signature database 5072 (20100429) __________

The message was checked by ESET Smart Security.

http://www.eset.com