ntlm_auth and clear-text passwords
robiwan at arcor.de
robiwan at arcor.de
Mon Jul 3 10:38:27 CEST 2006
Dear all,
For AAA-Authenticating on a Cisco Catalyst Switch 3750, i try to use use the ntlm_auth to authenticate users against our Active Directory (domain-name: SOUTH). Users telnet the switch, therefore a clear-text password will be sent.
according to an earlier posting http://lists.freeradius.org/mailman/htdig/freeradius-users/2005-July/045377.html
i did this:
> What you need to do is to configure a *different* ntlm_auth, only
> for clear-text passwords. The simplest way to do this is to use the
> "exec" module:
>
> modules {
> ...
> exec win_domain {
> wait = yes
> input_pairs = request
> output_pairs = reply
> program = "ntlm_auth --username=\"%{User-Name}\" --password=\"%{User-Password}\" --domain=usmisgne"
> }
> ...
> }
>
> Now list "win_domain" in the "authenticate" section, and add the
> following entry to the "users" file:
>
> DEFAULT Auth-Type = win_domain
>
But the authentication still fails.
My ntlm_auth shell-command works:
~# /usr/bin/ntlm_auth --username="john.smith" --password='smith1000' --domain=SOUTH
NT_STATUS_OK: Success (0x0)
....but authentication via freeradius fails.
Here are my config files and the complete freeradius -X output:
my radiusd.conf file:
-----------------------------
prefix = /usr
exec_prefix = /usr
sysconfdir = /etc
localstatedir = /var
sbindir = ${exec_prefix}/sbin
logdir = /var/log/freeradius
raddbdir = /etc/freeradius
radacctdir = ${logdir}/radacct
confdir = ${raddbdir}
run_dir = ${localstatedir}/run/freeradius
log_file = ${logdir}/radius.log
libdir = /usr/lib/freeradius
pidfile = ${run_dir}/freeradius.pid
max_request_time = 30
delete_blocked_requests = no
cleanup_delay = 5
max_requests = 1024
bind_address = *
port = 0
hostname_lookups = no
allow_core_dumps = no
regular_expressions = yes
extended_expressions = yes
log_stripped_names = yes
log_auth = yes
log_auth_badpass = yes
log_auth_goodpass = yes
usercollide = no
lower_user = no
lower_pass = no
nospace_user = no
nospace_pass = no
checkrad = ${sbindir}/checkrad
security {
max_attributes = 200
reject_delay = 1
status_server = no
}
proxy_requests = yes
$INCLUDE ${confdir}/proxy.conf
$INCLUDE ${confdir}/clients.conf
snmp = no
$INCLUDE ${confdir}/snmp.conf
thread pool {
start_servers = 5
max_servers = 32
min_spare_servers = 3
max_spare_servers = 10
max_requests_per_server = 0
}
modules {
pap {
encryption_scheme = crypt
}
chap {
authtype = CHAP
}
pam {
pam_auth = radiusd
}
unix {
cache = no
cache_reload = 600
shadow = /etc/shadow
radwtmp = ${logdir}/radwtmp
}
$INCLUDE ${confdir}/eap.conf
mschap {
authtype = MS-CHAP
use_mppe = no
require_encryption = yes
require_strong = yes
with_ntdomain_hack = yes
ntlm_auth = "/usr/bin/ntlm_auth --request-nt-key --domain=%{mschap:NT-Domain} --username=%{mschap:User-Name} --challenge=%{mschap:Challenge} --nt-response=%{mschap:NT-Response}"
}
ldap {
server = "10.187.64.3"
identity = "CN=Hans Dampf,CN=Computers,DC=winlab,DC=rsnhm,DC=t-com,DC=de"
password = Gerti1000
basedn = "DC=winlab,DC=rsnhm,DC=t-com,DC=de"
filter = "sAMAccountname=%{User-Name}"
start_tls = no
dictionary_mapping = ${raddbdir}/ldap.attrmap
ldap_connections_number = 5
edir_account_policy_check=no
timeout = 4
timelimit = 3
net_timeout = 1
}
realm IPASS {
format = prefix
delimiter = "/"
ignore_default = no
ignore_null = no
}
realm suffix {
format = suffix
delimiter = "@"
ignore_default = no
ignore_null = no
}
realm realmpercent {
format = suffix
delimiter = "%"
ignore_default = no
ignore_null = no
}
realm ntdomain {
format = prefix
delimiter = "\\"
ignore_default = no
ignore_null = no
}
checkval {
item-name = Calling-Station-Id
check-name = Calling-Station-Id
data-type = string
}
preprocess {
huntgroups = ${confdir}/huntgroups
hints = ${confdir}/hints
with_ascend_hack = no
ascend_channels_per_line = 23
with_ntdomain_hack = no
with_specialix_jetstream_hack = no
with_cisco_vsa_hack = no
}
files {
usersfile = ${confdir}/users
acctusersfile = ${confdir}/acct_users
preproxy_usersfile = ${confdir}/preproxy_users
compat = no
}
detail {
detailfile = ${radacctdir}/%{Client-IP-Address}/detail-%Y%m%d
detailperm = 0600
}
detail auth_log {
detailfile = ${radacctdir}/%{Client-IP-Address}/auth-detail-%Y%m%d
detailperm = 0600
}
acct_unique {
key = "User-Name, Acct-Session-Id, NAS-IP-Address, Client-IP-Address, NAS-Port"
}
$INCLUDE ${confdir}/sql.conf
radutmp {
filename = ${logdir}/radutmp
username = %{User-Name}
case_sensitive = yes
check_with_nas = yes
perm = 0600
callerid = "yes"
}
radutmp sradutmp {
filename = ${logdir}/sradutmp
perm = 0644
callerid = "no"
}
attr_filter {
attrsfile = ${confdir}/attrs
}
counter daily {
filename = ${raddbdir}/db.daily
key = User-Name
count-attribute = Acct-Session-Time
reset = daily
counter-name = Daily-Session-Time
check-name = Max-Daily-Session
allowed-servicetype = Framed-User
cache-size = 5000
}
sqlcounter dailycounter {
counter-name = Daily-Session-Time
check-name = Max-Daily-Session
sqlmod-inst = sql
key = User-Name
reset = daily
query = "SELECT SUM(AcctSessionTime - \
GREATEST((%b - UNIX_TIMESTAMP(AcctStartTime)), 0)) \
FROM radacct WHERE UserName='%{%k}' AND \
UNIX_TIMESTAMP(AcctStartTime) + AcctSessionTime > '%b'"
}
sqlcounter monthlycounter {
counter-name = Monthly-Session-Time
check-name = Max-Monthly-Session
sqlmod-inst = sql
key = User-Name
reset = monthly
query = "SELECT SUM(AcctSessionTime - \
GREATEST((%b - UNIX_TIMESTAMP(AcctStartTime)), 0)) \
FROM radacct WHERE UserName='%{%k}' AND \
UNIX_TIMESTAMP(AcctStartTime) + AcctSessionTime > '%b'"
}
always fail {
rcode = fail
}
always reject {
rcode = reject
}
always ok {
rcode = ok
simulcount = 0
mpp = no
}
expr {
}
digest {
}
exec {
wait = yes
input_pairs = request
}
exec echo {
wait = yes
program = "/bin/echo %{User-Name}"
input_pairs = request
output_pairs = reply
}
exec win_domain {
wait = yes
input_pairs = request
output_pairs = reply
program = "/usr/bin/ntlm_auth --username=\"%{User-Name}\" --password=\'%{User-Password}\' --domain=SOUTH"
}
ippool main_pool {
range-start = 192.168.1.1
range-stop = 192.168.3.254
netmask = 255.255.255.0
cache-size = 800
session-db = ${raddbdir}/db.ippool
ip-index = ${raddbdir}/db.ipindex
override = no
maximum-timeout = 0
}
}
instantiate {
exec
expr
}
authorize {
preprocess
chap
mschap
suffix
eap
files
ldap
}
authenticate {
Auth-Type PAP {
pap
}
Auth-Type CHAP {
chap
}
Auth-Type MS-CHAP {
mschap
}
unix
Auth-Type LDAP {
ldap
}
eap
Auth-Type win_domain{
win_domain
}
}
preacct {
preprocess
acct_unique
suffix
files
}
accounting {
detail
unix
radutmp
}
session {
radutmp
}
post-auth {
}
pre-proxy {
}
post-proxy {
eap
}
here is my users file
----------------------------
hugo User-Password == "hugo01"
Service-Type = Login,
Cisco-AVPair = "shell:priv-lvl=1"
DEFAULT Auth-Type = win_domain
freeradius -X
---------------------
freeradius -X
Starting - reading configuration files ...
reread_config: reading radiusd.conf
Config: including file: /etc/freeradius/proxy.conf
Config: including file: /etc/freeradius/clients.conf
Config: including file: /etc/freeradius/snmp.conf
Config: including file: /etc/freeradius/eap.conf
Config: including file: /etc/freeradius/sql.conf
main: prefix = "/usr"
main: localstatedir = "/var"
main: logdir = "/var/log/freeradius"
main: libdir = "/usr/lib/freeradius"
main: radacctdir = "/var/log/freeradius/radacct"
main: hostname_lookups = no
main: snmp = 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 = yes
main: log_file = "/var/log/freeradius/radius.log"
main: log_auth = yes
main: log_auth_badpass = yes
main: log_auth_goodpass = yes
main: pidfile = "/var/run/freeradius/freeradius.pid"
main: user = "(null)"
main: group = "(null)"
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
Using deprecated naslist file. Support for this will go away soon.
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"
Module: Instantiated pap (pap)
Module: Loaded CHAP
Module: Instantiated chap (chap)
Module: Loaded MS-CHAP
mschap: use_mppe = no
mschap: require_encryption = yes
mschap: require_strong = yes
mschap: with_ntdomain_hack = yes
mschap: passwd = "(null)"
mschap: authtype = "MS-CHAP"
mschap: ntlm_auth = "/usr/bin/ntlm_auth --request-nt-key --domain=%{mschap:NT-Domain} --username=%{mschap:User-Name} --challenge=%{mschap:Challenge} --nt-response=%{mschap:NT-Response}"
Module: Instantiated mschap (mschap)
Module: Loaded System
unix: cache = no
unix: passwd = "(null)"
unix: shadow = "/etc/shadow"
unix: group = "(null)"
unix: radwtmp = "/var/log/freeradius/radwtmp"
unix: usegroup = no
unix: cache_reload = 600
Module: Instantiated unix (unix)
Module: Loaded LDAP
ldap: server = "10.187.64.3"
ldap: port = 389
ldap: net_timeout = 1
ldap: timeout = 4
ldap: timelimit = 3
ldap: identity = "CN=Hans Dampf,CN=Computers,DC=winlab,DC=rsnhm,DC=t-com,DC=de"
ldap: tls_mode = no
ldap: start_tls = no
ldap: tls_cacertfile = "(null)"
ldap: tls_cacertdir = "(null)"
ldap: tls_certfile = "(null)"
ldap: tls_keyfile = "(null)"
ldap: tls_randfile = "(null)"
ldap: tls_require_cert = "allow"
ldap: password = "Gerti1000"
ldap: basedn = "DC=winlab,DC=rsnhm,DC=t-com,DC=de"
ldap: filter = "sAMAccountname=%{User-Name}"
ldap: base_filter = "(objectclass=radiusprofile)"
ldap: default_profile = "(null)"
ldap: profile_attribute = "(null)"
ldap: password_header = "(null)"
ldap: password_attribute = "(null)"
ldap: access_attr = "(null)"
ldap: groupname_attribute = "cn"
ldap: groupmembership_filter = "(|(&(objectClass=GroupOfNames)(member=%{Ldap-UserDn}))(&(objectClass=GroupOfUniqueNames)(uniquemember=%{Ldap-UserDn})))"
ldap: groupmembership_attribute = "(null)"
ldap: dictionary_mapping = "/etc/freeradius/ldap.attrmap"
ldap: ldap_debug = 0
ldap: ldap_connections_number = 5
ldap: compare_check_items = no
ldap: access_attr_used_for_allow = yes
ldap: do_xlat = yes
ldap: edir_account_policy_check = no
ldap: 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 /etc/freeradius/ldap.attrmap
rlm_ldap: LDAP uid mapped to RADIUS $GENERIC$
conns: 0x81215a8
Module: Instantiated ldap (ldap)
Module: Loaded eap
eap: default_eap_type = "peap"
eap: timer_expire = 60
eap: ignore_unknown_eap_types = no
eap: cisco_accounting_username_bug = no
rlm_eap: Loaded and initialized type md5
rlm_eap: Loaded and initialized type leap
gtc: challenge = "Password: "
gtc: auth_type = "PAP"
rlm_eap: Loaded and initialized type gtc
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/freeradius/certs/cert-srv.pem"
tls: certificate_file = "/etc/freeradius/certs/cert-srv.pem"
tls: CA_file = "/etc/freeradius/certs/demoCA/cacert.pem"
tls: private_key_password = "whatever"
tls: dh_file = "/etc/freeradius/certs/dh"
tls: random_file = "/etc/freeradius/certs/random"
tls: fragment_size = 1024
tls: include_length = yes
tls: check_crl = no
tls: check_cert_cn = "(null)"
rlm_eap_tls: Loading the certificate file as a chain
rlm_eap: Loaded and initialized type tls
peap: default_eap_type = "mschapv2"
peap: copy_request_to_tunnel = yes
peap: use_tunneled_reply = yes
peap: proxy_tunneled_request_as_eap = yes
rlm_eap: Loaded and initialized type peap
mschapv2: with_ntdomain_hack = no
rlm_eap: Loaded and initialized type mschapv2
Module: Instantiated eap (eap)
exec: wait = yes
exec: program = "/usr/bin/ntlm_auth --username="%{User-Name}" --password='%{User-Password}' --domain=SOUTH"
exec: input_pairs = "request"
exec: output_pairs = "reply"
exec: packet_type = "(null)"
Module: Instantiated exec (win_domain)
Module: Loaded preprocess
preprocess: huntgroups = "/etc/freeradius/huntgroups"
preprocess: hints = "/etc/freeradius/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
Module: Instantiated preprocess (preprocess)
Module: Loaded realm
realm: format = "suffix"
realm: delimiter = "@"
realm: ignore_default = no
realm: ignore_null = no
Module: Instantiated realm (suffix)
Module: Loaded files
files: usersfile = "/etc/freeradius/users"
files: acctusersfile = "/etc/freeradius/acct_users"
files: preproxy_usersfile = "/etc/freeradius/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 detail
detail: detailfile = "/var/log/freeradius/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/freeradius/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 127.0.0.1:35261, id=176, length=64
User-Name = "john.smith"
User-Password = "smith1000"
NAS-IP-Address = 255.255.255.255
NAS-Port = 1645
Processing the authorize section of radiusd.conf
modcall: entering group authorize for request 0
modcall[authorize]: module "preprocess" returns ok for request 0
modcall[authorize]: module "chap" returns noop for request 0
modcall[authorize]: module "mschap" returns noop for request 0
rlm_realm: No '@' in User-Name = "john.smith", looking up realm NULL
rlm_realm: No such realm "NULL"
modcall[authorize]: module "suffix" returns noop for request 0
rlm_eap: No EAP-Message, not doing EAP
modcall[authorize]: module "eap" returns noop for request 0
users: Matched entry DEFAULT at line 99
modcall[authorize]: module "files" returns ok for request 0
rlm_ldap: - authorize
rlm_ldap: performing user authorization for john.smith
radius_xlat: 'sAMAccountname=john.smith'
radius_xlat: 'DC=winlab,DC=rsnhm,DC=t-com,DC=de'
rlm_ldap: ldap_get_conn: Checking Id: 0
rlm_ldap: ldap_get_conn: Got Id: 0
rlm_ldap: attempting LDAP reconnection
rlm_ldap: (re)connect to 10.187.64.3:389, authentication 0
rlm_ldap: bind as CN=Hans Dampf,CN=Computers,DC=winlab,DC=rsnhm,DC=t-com,DC=de/Gerti1000 to 10.187.64.3:389
rlm_ldap: waiting for bind result ...
rlm_ldap: Bind was successful
rlm_ldap: performing search in DC=winlab,DC=rsnhm,DC=t-com,DC=de, with filter sAMAccountname=john.smith
rlm_ldap: looking for check items in directory...
rlm_ldap: looking for reply items in directory...
rlm_ldap: user john.smith authorized to use remote access
rlm_ldap: ldap_release_conn: Release Id: 0
modcall[authorize]: module "ldap" returns ok for request 0
modcall: leaving group authorize (returns ok) for request 0
rad_check_password: Found Auth-Type win_domain
auth: type "win_domain"
Processing the authenticate section of radiusd.conf
modcall: entering group win_domain for request 0
radius_xlat: '/usr/bin/ntlm_auth --username="john.smith" --password='smith1000' --domain=SOUTH'
Exec-Program: /usr/bin/ntlm_auth --username="john.smith" --password='smith1000' --domain=SOUTH
Exec-Program output: NT_STATUS_NO_SUCH_USER: No such user (0xc0000064)
Exec-Program-Wait: plaintext: NT_STATUS_NO_SUCH_USER: No such user (0xc0000064)
Exec-Program: returned: 1
rlm_exec (win_domain): External script failed
modcall[authenticate]: module "win_domain" returns fail for request 0
modcall: leaving group win_domain (returns fail) for request 0
auth: Failed to validate the user.
Login incorrect: [john.smith/smith1000] (from client localhost port 1645)
Delaying request 0 for 1 seconds
Finished request 0
Going to the next request
--- Walking the entire request list ---
Waking up in 1 seconds...
--- Walking the entire request list ---
Waking up in 1 seconds...
--- Walking the entire request list ---
Sending Access-Reject of id 176 to 127.0.0.1 port 35261
Waking up in 4 seconds...
--- Walking the entire request list ---
Cleaning up request 0 ID 176 with timestamp 44a4e1a4
Nothing to do. Sleeping until we see a request.
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