Adding modified libraries without recompiling entirely FreeRADIUS

[yoann Couble]

Hi everyone,

I have a freeRADIUS 2.0.4 server which has been running well for the past
two years.
I am trying to integrate smoothly a modified version of the chap module. To
do that I've been testing different approach on a VM for tests.


With the sources downloaded from packages.debian.org, I wrote my version
of rlm_chap.c. Everything compiles and works fine when i do:
     ./configure
     make
     make install
from the source folder and run it with *radiusd*.
NB: To avoid lib conflicts i remove the libs generated in /usr/local/lib
during installation before i start again /usr/sbin/freeradius

But now i would like to update my working version of freeradius (which was
installed through an apt-get install) without causing much trouble.
As I only modified rlm_chap.c I thought i could simply replace the current
library
/usr/lib/rlm_chap-2.0.4.so
with the one produced during compilation
freeradius-2.0.4/src/modules/rlm_chap/.libs/rlm_chap-2.0.4.so

After that i restart freeradius (the apt-get version) with
freeradius -X
Everything looks fine but when i send a request i get a segmentation fault
when the server tries to enter chap module. (see the debug entry further)


If i go back and replace /usr/lib/freeradius/rlm_chap-2.0.4.so by the
original
Everything works fine again.

I am pretty sure it has something to do with compilation and the way files
were generated.
Do you think it is possible to do what I want? i.e. inserting a modified
library into the working set of library.
Reinstalling the working freeradius or using the compiled files is not an
possibility.


If you have any idea on what I am doing wrong (I am still a beginner and I
probably do a lot of things wrong), please feel free to tell me and to
share with me if you had similar situations.

Thanks !
Regards,

Yoann Couble

PS: *tldr: I want to replace chap library by a modified library of mine*

Here is the debug entry
-------------------------------------------------------------------------------------------------------------------------------------------
# freeradius -X
FreeRADIUS Version 2.0.4, for host x86_64-pc-linux-gnu, built on Sep 11
2012 at 17:06:46
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 /etc//radiusd.conf
including configuration file /etc//proxy.conf
including configuration file /etc//clients.conf
including files in directory /etc//modules/
including configuration file /etc//modules/digest
including configuration file /etc//modules/linelog
including configuration file /etc//modules/always
including configuration file /etc//modules/dynamic_clients
including configuration file /etc//modules/opendirectory
including configuration file /etc//modules/cui
including configuration file /etc//modules/unix
including configuration file /etc//modules/inner-eap
including configuration file /etc//modules/mschap
including configuration file /etc//modules/attr_filter
including configuration file /etc//modules/chap
including configuration file /etc//modules/sql_log
including configuration file /etc//modules/pap
including configuration file /etc//modules/exec
including configuration file /etc//modules/expiration
including configuration file /etc//modules/ntlm_auth
including configuration file /etc//modules/acct_unique
including configuration file /etc//modules/counter
including configuration file /etc//modules/perl
including configuration file /etc//modules/checkval
including configuration file /etc//modules/sqlcounter_expire_on_login
including configuration file /etc//modules/logintime
including configuration file /etc//modules/radutmp
including configuration file /etc//modules/echo
including configuration file /etc//modules/detail
including configuration file /etc//modules/preprocess
including configuration file /etc//modules/smsotp
including configuration file /etc//modules/krb5
including configuration file /etc//modules/files
including configuration file /etc//modules/sradutmp
including configuration file /etc//modules/ldap
including configuration file /etc//modules/realm
including configuration file /etc//modules/ippool
including configuration file /etc//modules/detail.example.com
including configuration file /etc//modules/etc_group
including configuration file /etc//modules/smbpasswd
including configuration file /etc//modules/attr_rewrite
including configuration file /etc//modules/passwd
including configuration file /etc//modules/policy
including configuration file /etc//modules/detail.log
including configuration file /etc//modules/mac2ip
including configuration file /etc//modules/otp
including configuration file /etc//modules/pam
including configuration file /etc//modules/wimax
including configuration file /etc//modules/expr
including configuration file /etc//modules/mac2vlan
including configuration file /etc//eap.conf
including configuration file /etc//sql.conf
including configuration file /etc//sql//dialup.conf
including configuration file /etc//policy.conf
including files in directory /etc//sites-enabled/
including configuration file /etc//sites-enabled/default
including configuration file /etc//sites-enabled/inner-tunnel
main {
user = "freerad"
group = "freerad"
allow_core_dumps = no
}
including dictionary file /etc//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
pidfile = "/var/run/freeradius/freeradius.pid"
checkrad = "/usr/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 = yes
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 0.0.0.0/1 {
require_message_authenticator = no
secret = "secret"
}
client 128.0.0.0/1 {
require_message_authenticator = no
secret = "secret"
}
radiusd: #### Instantiating modules ####
instantiate {
Module: Linked to module rlm_exec
Module: Instantiating module "exec" from file /etc//modules/exec
exec {
wait = no
input_pairs = "request"
shell_escape = yes
}
Module: Linked to module rlm_expr
Module: Instantiating module "expr" from file /etc//modules/expr
Module: Linked to module rlm_expiration
Module: Instantiating module "expiration" from file /etc//modules/expiration
expiration {
reply-message = "Password Has Expired "
}
Module: Linked to module rlm_logintime
Module: Instantiating module "logintime" from file /etc//modules/logintime
logintime {
reply-message = "You are calling outside your allowed timespan "
minimum-timeout = 60
}
}
radiusd: #### Loading Virtual Servers ####
server inner-tunnel { # from file /etc//sites-enabled/inner-tunnel
modules {
Module: Checking authenticate {...} for more modules to load
Module: Linked to module rlm_pap
Module: Instantiating module "pap" from file /etc//modules/pap
pap {
encryption_scheme = "auto"
auto_header = no
}
Module: Linked to module rlm_chap
Module: Instantiating module "chap" from file /etc//modules/chap
Module: Linked to module rlm_mschap
Module: Instantiating module "mschap" from file /etc//modules/mschap
mschap {
use_mppe = yes
require_encryption = no
require_strong = no
with_ntdomain_hack = no
}
Module: Linked to module rlm_unix
Module: Instantiating module "unix" from file /etc//modules/unix
unix {
radwtmp = "/var/log/freeradius/radwtmp"
}
Module: Linked to module rlm_eap
Module: Instantiating module "eap" from file /etc//eap.conf
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
CA_path = "/etc/freeradius/certs"
pem_file_type = yes
private_key_file = "/etc/freeradius/certs/server.key"
certificate_file = "/etc/freeradius/certs/server.pem"
CA_file = "/etc/freeradius/certs/ca.pem"
private_key_password = "whatever"
dh_file = "/etc/freeradius/certs/dh"
random_file = "/dev/urandom"
fragment_size = 1024
include_length = yes
check_crl = no
cipher_list = "DEFAULT"
make_cert_command = "/etc/freeradius/certs/bootstrap"
cache {
enable = no
lifetime = 24
max_entries = 255
}
verify {
}
}
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 module "suffix" from file /etc//modules/realm
realm suffix {
format = "suffix"
delimiter = "@"
ignore_default = no
ignore_null = no
}
Module: Linked to module rlm_files
Module: Instantiating module "files" from file /etc//modules/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 module "radutmp" from file /etc//modules/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 module "attr_filter.access_reject" from file /etc/
/modules/attr_filter
attr_filter attr_filter.access_reject {
attrsfile = "/etc/freeradius/attrs.access_reject"
key = "%{User-Name}"
}
} # modules
} # server
server { # from file /etc//radiusd.conf
modules {
Module: Checking authenticate {...} for more modules to load
Module: Linked to module rlm_digest
Module: Instantiating module "digest" from file /etc//modules/digest
Module: Checking authorize {...} for more modules to load
Module: Linked to module rlm_preprocess
Module: Instantiating module "preprocess" from file /etc//modules/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: Linked to module rlm_sql
Module: Instantiating module "sql" from file /etc//sql.conf
sql {
driver = "rlm_sql_mysql"
server = "localhost"
port = ""
login = "radius"
password = "radpass"
radius_db = "radius"
read_groups = yes
sqltrace = no
sqltracefile = "/var/log/freeradius/sqltrace.sql"
readclients = no
deletestalesessions = yes
num_sql_socks = 5
lifetime = 0
max_queries = 0
sql_user_name = "%{User-Name}"
default_user_profile = ""
nas_query = "SELECT id, nasname, shortname, type, secret, server FROM nas"
authorize_check_query = "SELECT id, username, attribute, value, op FROM
radcheck WHERE username = '%{SQL-User-Name}' ORDER BY id"
authorize_reply_query = "SELECT id, username, attribute, value, op FROM
radreply WHERE username = '%{SQL-User-Name}' ORDER BY id"
authorize_group_check_query = "SELECT id, groupname, attribute, Value, op
FROM radgroupcheck WHERE groupname = '%{Sql-Group}' ORDER BY id"
authorize_group_reply_query = "SELECT id, groupname, attribute, value, op
FROM radgroupreply WHERE groupname = '%{Sql-Group}' ORDER BY id"
accounting_onoff_query = " UPDATE radacct SET acctstoptime = '%S',
acctsessiontime = unix_timestamp('%S') - unix_timestamp(acctstarttime),
acctterminatecause = '%{Acct-Terminate-Cause}', acctstopdelay =
%{%{Acct-Delay-Time}:-0} WHERE acctstoptime IS NULL AND nasipaddress =
'%{NAS-IP-Address}' AND acctstarttime <= '%S'"
accounting_update_query = " UPDATE radacct SET framedipaddress =
'%{Framed-IP-Address}', acctsessiontime = '%{Acct-Session-Time}',
acctinputoctets = '%{%{Acct-Input-Gigawords}:-0}' << 32 |
'%{%{Acct-Input-Octets}:-0}', acctoutputoctets =
'%{%{Acct-Output-Gigawords}:-0}' << 32 | '%{%{Acct-Output-Octets}:-0}'
WHERE acctsessionid = '%{Acct-Session-Id}' AND username =
'%{SQL-User-Name}' AND nasipaddress = '%{NAS-IP-Address}'"
accounting_update_query_alt = " INSERT INTO radacct (acctsessionid,
acctuniqueid, username, realm, nasipaddress, nasportid, nasporttype,
acctstarttime, acctsessiontime, acctauthentic, connectinfo_start,
acctinputoctets, acctoutputoctets, calledstationid, callingstationid,
servicetype, framedprotocol, framedipaddress, acctstartdelay,
xascendsessionsvrkey) VALUES ('%{Acct-Session-Id}',
'%{Acct-Unique-Session-Id}', '%{SQL-User-Name}', '%{Realm}',
'%{NAS-IP-Address}', '%{NAS-Port}', '%{NAS-Port-Type}', DATE_SUB('%S',
INTERVAL (%{%{Acct-Session-Time}:-0} + %{%{Acct-Delay-Time}:-0}) SECOND),
'%{Acct-Session-Time}', '%{Acct-Authentic}', '',
'%{%{Acct-Input-Gigawords}:-0}' << 32 | '%{%{Acct-Input-Octets}:-0}',
'%{%{Acct-Output-Gigawords}:-0}' << 32 | '%{%{Acct-Output-Octets}:-0}',
'%{Called-Station-Id}', '%{Calling-Station-Id}', '%{Service-Type}',
'%{Framed-Protocol}', '%{Framed-IP-Address}', '0',
'%{X-Ascend-Session-Svr-Key}')"
accounting_start_query = " INSERT INTO radacct (acctsessionid,
acctuniqueid, username, realm, nasipaddress, nasportid, nasporttype,
acctstarttime, acctstoptime, acctsessiontime, acctauthentic,
connectinfo_start, connectinfo_stop, acctinputoctets, acctoutputoctets,
calledstationid, callingstationid, acctterminatecause, servicetype,
framedprotocol, framedipaddress, acctstartdelay, acctstopdelay,
xascendsessionsvrkey) VALUES ('%{Acct-Session-Id}',
'%{Acct-Unique-Session-Id}', '%{SQL-User-Name}', '%{Realm}',
'%{NAS-IP-Address}', '%{NAS-Port}', '%{NAS-Port-Type}', '%S', NULL, '0',
'%{Acct-Authentic}', '%{Connect-Info}', '', '0', '0',
'%{Called-Station-Id}', '%{Calling-Station-Id}', '', '%{Service-Type}',
'%{Framed-Protocol}', '%{Framed-IP-Address}', '%{%{Acct-Delay-Time}:-0}',
'0', '%{X-Ascend-Session-Svr-Key}')"
accounting_start_query_alt = " UPDATE radacct SET acctstarttime = '%S',
acctstartdelay = '%{%{Acct-Delay-Time}:-0}', connectinfo_start =
'%{Connect-Info}' WHERE acctsessionid = '%{Acct-Session-Id}' AND username =
'%{SQL-User-Name}' AND nasipaddress = '%{NAS-IP-Address}'"
accounting_stop_query = " UPDATE radacct SET acctstoptime = '%S',
acctsessiontime = '%{Acct-Session-Time}', acctinputoctets =
'%{%{Acct-Input-Gigawords}:-0}' << 32 | '%{%{Acct-Input-Octets}:-0}',
acctoutputoctets = '%{%{Acct-Output-Gigawords}:-0}' << 32 |
'%{%{Acct-Output-Octets}:-0}', acctterminatecause =
'%{Acct-Terminate-Cause}', acctstopdelay = '%{%{Acct-Delay-Time}:-0}',
connectinfo_stop = '%{Connect-Info}' WHERE acctsessionid =
'%{Acct-Session-Id}' AND username = '%{SQL-User-Name}' AND nasipaddress =
'%{NAS-IP-Address}'"
accounting_stop_query_alt = " INSERT INTO radacct (acctsessionid,
acctuniqueid, username, realm, nasipaddress, nasportid, nasporttype,
acctstarttime, acctstoptime, acctsessiontime, acctauthentic,
connectinfo_start, connectinfo_stop, acctinputoctets, acctoutputoctets,
calledstationid, callingstationid, acctterminatecause, servicetype,
framedprotocol, framedipaddress, acctstartdelay, acctstopdelay) VALUES
('%{Acct-Session-Id}', '%{Acct-Unique-Session-Id}', '%{SQL-User-Name}',
'%{Realm}', '%{NAS-IP-Address}', '%{NAS-Port}', '%{NAS-Port-Type}',
DATE_SUB('%S', INTERVAL (%{%{Acct-Session-Time}:-0} +
%{%{Acct-Delay-Time}:-0}) SECOND), '%S', '%{Acct-Session-Time}',
'%{Acct-Authentic}', '', '%{Connect-Info}', '%{%{Acct-Input-Gigawords}:-0}'
<< 32 | '%{%{Acct-Input-Octets}:-0}', '%{%{Acct-Output-Gigawords}:-0}' <<
32 | '%{%{Acct-Output-Octets}:-0}', '%{Called-Station-Id}',
'%{Calling-Station-Id}', '%{Acct-Terminate-Cause}', '%{Service-Type}',
'%{Framed-Protocol}', '%{Framed-IP-Address}', '0',
'%{%{Acct-Delay-Time}:-0}')"
group_membership_query = "SELECT groupname FROM radusergroup WHERE username
= '%{SQL-User-Name}' ORDER BY priority"
connect_failure_retry_delay = 60
simul_count_query = ""
simul_verify_query = "SELECT radacctid, acctsessionid, username,
nasipaddress, nasportid, framedipaddress, callingstationid, framedprotocol
FROM radacct WHERE username = '%{SQL-User-Name}' AND acctstoptime IS NULL"
postauth_query = "INSERT INTO radpostauth (username, pass, reply, authdate)
VALUES ( '%{User-Name}', '%{%{User-Password}:-%{Chap-Password}}',
'%{reply:Packet-Type}', '%S')"
safe-characters =
"@abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789.-_: /"
}
rlm_sql (sql): Driver rlm_sql_mysql (module rlm_sql_mysql) loaded and linked
rlm_sql (sql): Attempting to connect to root at localhost:/radius
rlm_sql (sql): starting 0
rlm_sql (sql): Attempting to connect rlm_sql_mysql #0
rlm_sql_mysql: Starting connect to MySQL server for #0
rlm_sql (sql): Connected new DB handle, #0
rlm_sql (sql): starting 1
rlm_sql (sql): Attempting to connect rlm_sql_mysql #1
rlm_sql_mysql: Starting connect to MySQL server for #1
rlm_sql (sql): Connected new DB handle, #1
rlm_sql (sql): starting 2
rlm_sql (sql): Attempting to connect rlm_sql_mysql #2
rlm_sql_mysql: Starting connect to MySQL server for #2
rlm_sql (sql): Connected new DB handle, #2
rlm_sql (sql): starting 3
rlm_sql (sql): Attempting to connect rlm_sql_mysql #3
rlm_sql_mysql: Starting connect to MySQL server for #3
rlm_sql (sql): Connected new DB handle, #3
rlm_sql (sql): starting 4
rlm_sql (sql): Attempting to connect rlm_sql_mysql #4
rlm_sql_mysql: Starting connect to MySQL server for #4
rlm_sql (sql): Connected new DB handle, #4
Module: Checking preacct {...} for more modules to load
Module: Linked to module rlm_acct_unique
Module: Instantiating module "acct_unique" from file /etc/
/modules/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 module "detail" from file /etc//modules/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 module "attr_filter.accounting_response" from file
/etc//modules/attr_filter
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
} # modules
} # server
radiusd: #### Opening IP addresses and Ports ####
listen {
type = "auth"
ipaddr = *
port = 0
}
listen {
type = "acct"
ipaddr = *
port = 0
}
listen {
type = "auth"
ipaddr = 127.0.0.1
port = 18120
}
Listening on authentication address * port 1812
Listening on accounting address * port 1813
Listening on authentication address 127.0.0.1 port 18120 as server
inner-tunnel
Listening on proxy address * port 1814
Ready to process requests.
rad_recv: Access-Request packet from host 213.186.50.98 port 47026, id=113,
length=57
User-Name = "user1"
CHAP-Password = 0x7104a64526171941a63bdee5dd7f4d8760
NAS-IP-Address = 127.0.0.1
NAS-Port = 1812
# Executing section authorize from file /etc//sites-enabled/default
+- entering group authorize {...}
++[preprocess] returns ok
Segmentation fault

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