Package: pure-ftpd
Version: 1.0.21-11.4
Severity: wishlist
Tags: patch
I needed to enable the external authentication daemon pure-authd.
Found out about /etc/pure-ftpd/conf/ExtAuth, but the FTP daemon would not
start, because the socket (which gets created by pure-authd) was missing.
It seemed illogical to create another init script, since the upload handler
is already started from the pure-ftpd init script. The auth daemon has to be
started before pure-ftpd because it needs to create the authentication
socket first (configured in ExtAuth, but in my opinion it should be static,
the ExtAuth value changed to boolean, like CallUploadScript[B)
I'm attaching the diff from the old init script (I did this on Lenny, but I
checked the sid init script and it doesn't seem like anything changed).
I'm also attaching an example python external authentication script which
could be a little more polished, but it was just a proof of concept for me.
If you're interested in including it, I'm willing to spruce it up a little.
There are also a few new variables to be set in
/etc/default/pure-ftpd-common:
AUTHDSCRIPT=/path/to/authhandler[B
AUTHDUID=
AUTHDGID=
in line with the variables used for upload handler.
-- System Information:
Debian Release: 5.0.8
APT prefers oldstable
APT policy: (500, 'oldstable')
Architecture: amd64 (x86_64)
Kernel: Linux 2.6.26-2-xen-amd64 (SMP w/2 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash
Versions of packages pure-ftpd depends on:
ii libc6 2.7-18lenny7 GNU C Library: Shared libraries
ii libcap1 1:1.10-14 support for getting/setting POSIX.
ii libpam0g 1.0.1-5+lenny1 Pluggable Authentication Modules l
ii libssl0.9.8 0.9.8g-15+lenny11 SSL shared libraries
ii pure-ftpd-common 1.0.21-11.4 Pure-FTPd FTP server (Common Files
pure-ftpd recommends no packages.
pure-ftpd suggests no packages.
-- no debconf information
#!/usr/bin/python
"""
pure-authd authentication handler
Checks for username/password files on the filesystem which allow chrooted FTP
access to a directory.
"""
import sys
import os
from os import environ as env
from syslog import *
# Requires getent - hg clone https://bitbucket.org/maze/getent
import getent
openlog('pure-authhandler.py[%s]' % os.getpid(),LOG_INFO,LOG_DAEMON)
syslog('starting operation.')
try:
AUTHD_ACCOUNT = env['AUTHD_ACCOUNT']
AUTHD_PASSWORD = env['AUTHD_PASSWORD']
AUTHD_LOCAL_IP = env['AUTHD_LOCAL_IP']
AUTHD_LOCAL_PORT = env['AUTHD_LOCAL_PORT']
AUTHD_REMOTE_IP = env['AUTHD_REMOTE_IP']
except KeyError, e:
syslog('Parameter error: missing environment variable %s' % e)
print "auth_ok:0\nend"
sys.exit(1)
# Split the username on @
try:
(subuser,sysuser) = AUTHD_ACCOUNT.split('@')
except ValueError, e:
syslog('username %s not in subuser@systemuser format: %s' %
(AUTHD_ACCOUNT, e))
print "auth_ok:0\nend"
sys.exit(0)
try:
website = getent.passwd(sysuser)
if not website:
syslog('user/website %s does not exist' % sysuser)
print "auth_ok:0\nend"
sys.exit(0)
if website.uid < 1000:
syslog('uid of user %s is less than 1000 (%s), denied' %
(sysuser, website.uid) )
print "auth_ok:-1\nend"
sys.exit(0)
subdir = website.dir + '/FTP/' + subuser
subpassfile = subdir + '.passwd'
if os.path.isdir(subdir) and os.path.isfile(subpassfile):
passfile = open(subpassfile)
password = passfile.readline().rstrip()
if password != AUTHD_PASSWORD:
#syslog('Password for user %s does not match: is %s,
should be %s' % (AUTHD_ACCOUNT,password,AUTHD_PASSWORD) )
syslog('Authentication failure for user %s: wrong
password' % AUTHD_ACCOUNT )
print "auth_ok:-1\nend"
sys.exit(0)
else:
syslog('User %s successfully authenticated' %
AUTHD_ACCOUNT)
print "auth_ok:1\nuid:%s\ngid:%s\ndir:%s\nend" %
(website.uid,website.gid,subdir+'/./')
sys.exit(0)
else:
syslog('subuser %s does not exist' % AUTHD_ACCOUNT)
print "auth_ok:0\nend"
sys.exit(0)
except Exception, e:
syslog('Exception checking credentials: %s' % e)
print "auth_ok:0\nend"
sys.exit(0)
--- /etc/init.d/pure-ftpd.ORIG 2011-03-25 13:59:43.000000000 +0100
+++ /etc/init.d/pure-ftpd 2011-03-25 14:21:04.000000000 +0100
@@ -18,6 +18,10 @@
UDDESC="ftp upload handler"
WRAPPER=/usr/sbin/pure-ftpd-wrapper
+AUTHDAEMON=/usr/sbin/pure-authd
+ADNAME=pure-authd
+ADDESC="external authentication daemon"
+
# try to figure with suffix this script is called,
# $0 might be a symlink pointing to this script
if [ -h $0 ]; then
@@ -65,9 +69,23 @@
fi
}
+start_authd() {
+ if [ -x "$AUTHDSCRIPT" -a "$STANDALONE_OR_INETD" != inetd ]
+ then
+ AOPTS=""
+ test "$AUTHDUID" && AOPTS="$UOPTS -u $AUTHDUID"
+ test "$AUTHDGID" && AOPTS="$UOPTS -u $AUTHDGID"
+ echo -n "$1 $ADDESC: "
+ start-stop-daemon --start $SSDAEMONLOGOPTS --oknodo \
+ --exec $AUTHDAEMON -- -r "$AUTHDSCRIPT" -B -s `head -1
/etc/pure-ftpd/conf/ExtAuth` $AOPTS
+ echo "$ADNAME."
+ fi
+}
+
case "$1" in
start)
test "$STANDALONE_OR_INETD" = standalone || exit 0
+ start_authd Starting
echo -n "Starting $DESC: "
start-stop-daemon --start $SSDAEMONLOGOPTS --pidfile
/var/run/pure-ftpd/pure-ftpd.pid \
--exec $WRAPPER -- $SUFFIX
@@ -78,6 +96,7 @@
start-stop-daemon --stop $SSDAEMONLOGOPTS --oknodo \
--pidfile /var/run/pure-ftpd/pure-ftpd.pid
start-stop-daemon --stop $SSDAEMONLOGOPTS --oknodo --exec $UPLOADDAEMON
+ start-stop-daemon --stop $SSDAEMONLOGOPTS --oknodo --exec $AUTHDAEMON
echo "$NAME."
;;
restart|force-reload)
@@ -86,10 +105,12 @@
start-stop-daemon --stop $SSDAEMONLOGOPTS --oknodo \
--pidfile /var/run/pure-ftpd/pure-ftpd.pid
start-stop-daemon --stop $SSDAEMONLOGOPTS --oknodo --exec $UPLOADDAEMON
+ start-stop-daemon --stop $SSDAEMONLOGOPTS --oknodo --exec $AUTHDAEMON
sleep 1
start-stop-daemon --start $SSDAEMONLOGOPTS --pidfile \
/var/run/pure-ftpd/pure-ftpd.pid --exec $WRAPPER -- $SUFFIX
start_uploadscript Restarting
+ start_authd Restarting
;;
*)
N=/etc/init.d/$NAME
