I'm sorry, I thought Thunderbird was going to prompt me for plain text
before sending, but it didn't. Here it is.
Nicolas
===
Hello list,
I am looking for a few pointers to make saslauthd authenticate over a
pam mechanism against a mysql database. All packages in this setup are
from Debian Sarge, they are
libsasl2 libsasl2-modules libsasl2-modules-sql sasl2-bin libpam-mysql
postfix postfix-mysql mysql-client mysql-server openssl libmysqlclient15
Though there's a wealth of "tutorials" that copy this setup from one
another, documentation on how these mechanisms work seems very scarce,
and I'm getting a bit stuck while trying to debug my config. Here are
the facts:
Per advice of a zillion tutorials, /etc/default/saslauthd looks like this:
START=yes
PARAMS="-m /var/spool/postfix/var/run/saslauthd -r"
MECHANISMS="pam"
... and in the same line of thought I modified the saslauthd pidfile in
/etc/init.d/saslauthd as such
PIDFILE="/var/spool/postfix/var/run/${NAME}/saslauthd.pid"
/etc/pam.d/smtp contains the following lines:
auth required pam_mysql.so user=username passwd=password host=127.0.0.1
db=mail table=postfix_users usercolumn=email passwdcolumn=clear crypt=1
account sufficient pam_mysql.so user=username passwd=password
host=127.0.0.1 db=mail table=postfix_users usercolumn=email
passwdcolumn=clear crypt=1
1. The first thing I notice is that when I start the saslauth daemon
(via # /etc/init.d/saslauthd start) the pid file is actually located in
/var/run/saslauthd/saslauthd.pid
These are the running processes:
igloo:/etc/postfix# ps aux|grep sasl
root 4666 0.0 1.1 7196 2212 pts/1 S 16:25 0:00
/usr/sbin/saslauthd -d -a pam
root 4667 0.0 1.1 7196 2212 pts/1 S 16:25 0:00
/usr/sbin/saslauthd -d -a pam
root 4668 0.0 1.1 7196 2212 pts/1 S 16:25 0:00
/usr/sbin/saslauthd -d -a pam
root 4669 0.0 1.1 7196 2212 pts/1 S 16:25 0:00
/usr/sbin/saslauthd -d -a pam
root 4670 0.0 1.1 7196 2212 pts/1 S 16:25 0:00
/usr/sbin/saslauthd -d -a pam
The permissions of the folder in de postfix tree are:
igloo:/etc/postfix# ls -l /var/spool/postfix/var/run/ total
4 drwxr-xr-x 2 root root 4096 2007-03-12 01:18 saslauthd
I also pasted the result of saslfinger below, for not burrying my second
question. So my first question is: how come the pid file is not in
/var/spool/postfix/var/run/saslauthd?
2. Next, the pam mechanism that saslauthd invokes is returning an error.
Here's what I get when I strace testsaslauthd:
igloo:/etc/postfix# strace /usr/sbin/testsaslauthd -u email@address -p
password -f /var/run/saslauthd/mux -s smtp
execve("/usr/sbin/testsaslauthd", ["/usr/sbin/testsaslauthd", "-u",
"email@address", "-p", "password", "-f", "/var/run/saslauthd/mux", "-s",
"smtp"], [/* 17 vars */]) = 0
uname({sys="Linux", node="igloo", ...}) = 0
brk(0) = 0x804b000
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
mmap2(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x40017000
access("/etc/ld.so.preload", R_OK) = -1 ENOENT (No such file or
directory)
open("/etc/ld.so.cache", O_RDONLY) = 3
fstat64(3, {st_mode=S_IFREG|0644, st_size=21217, ...}) = 0
mmap2(NULL, 21217, PROT_READ, MAP_PRIVATE, 3, 0) = 0x40019000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/tls/libresolv.so.2", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\260$\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=67364, ...}) = 0
mmap2(NULL, 75976, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0)
= 0x4001f000
mmap2(0x4002e000, 8192, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0xf) = 0x4002e000
mmap2(0x40030000, 6344, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x40030000
close(3) = 0
access("/etc/ld.so.nohwcap", F_OK) = -1 ENOENT (No such file or
directory)
open("/lib/tls/libc.so.6", O_RDONLY) = 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\240O\1"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0644, st_size=1241392, ...}) = 0
mmap2(NULL, 1251484, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3,
0) = 0x40032000
mmap2(0x4015a000, 28672, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x127) = 0x4015a000
mmap2(0x40161000, 10396, PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x40161000
close(3) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x40164000
mprotect(0x4015a000, 20480, PROT_READ) = 0
set_thread_area({entry_number:-1 -> 6, base_addr:0x401646c0,
limit:1048575, seg_32bit:1, contents:0, read_exec_only:0,
limit_in_pages:1, seg_not_present:0, useable:1}) = 0
munmap(0x40019000, 21217) = 0
fstat64(1, {st_mode=S_IFCHR|0600, st_rdev=makedev(136, 1), ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1,
0) = 0x40019000
socket(PF_FILE, SOCK_STREAM, 0) = 3
connect(3, {sa_family=AF_FILE, path="/var/run/saslauthd/mux"},
110saslauthd[4666] :rel_accept_lock : released accept lock
saslauthd[4667] :get_accept_lock : acquired accept lock
) = 0
writev(3, [{"\0\17email@address\0\10password\0\4smt"..., 35}], 1) = 35
read(3, saslauthd[4666] :do_auth : auth failure:
[user=email@address] [service=smtp] [realm=] [mech=pam] [reason=PAM auth
error]
"\0\21", 2) = 2
read(3, "NO PAM auth error", 17) = 17
close(3) = 0
write(1, "0: NO \"authentication failed\"\n", 300: NO "authentication
failed"
) = 30
munmap(0x40019000, 4096) = 0
exit_group(-1) = ?
Process 4691 detached
same story in /var/log/auth.log...
igloo:/etc/postfix# tail /var/log/auth.log
Mar 12 16:43:52 igloo saslauthd[4670]: rel_accept_lock : released accept
lock
Mar 12 16:43:52 igloo saslauthd[4666]: get_accept_lock : acquired accept
lock
Mar 12 16:43:52 igloo saslauthd[4670]: DEBUG: auth_pam: pam_authenticate
failed: Authentication failure
Mar 12 16:43:52 igloo saslauthd[4670]: do_auth : auth failure:
[user=email@address] [service=smtp] [realm=] [mech=pam] [reason=PAM auth
error]
A correct mysql query is logged in mysql.log. The same query over
courier's imap-ssl / authlib works just fine.
igloo:/etc/postfix# tail /var/log/mysql/mysql.log
070312 16:43:52 21 Connect vmailuser@localhost on mail
21 Init DB mail
21 Query SELECT clear FROM postfix_users
WHERE email = 'email@address'
21 Quit
So my second question is: since (I think) postfix is not involved when
testsaslauthd in invoked, and a valid mysql query seems to be logged,
can I assume that there is also a sasl/pam problem, and how should I
debug it?
Here's the output I get from saslfinger, you will notice that postfix is
chrooted:
igloo:/etc/postfix# saslfinger -s
saslfinger - postfix Cyrus sasl configuration Mon Mar 12 17:41:02 CET 2007
version: 1.0.1
mode: server-side SMTP AUTH
-- basics --
Postfix: 2.3.7
System: Debian GNU/Linux 4.0 \n \l
-- smtpd is linked to --
libsasl2.so.2 => /usr/lib/libsasl2.so.2 (0x40205000)
-- active SMTP AUTH and TLS parameters for smtpd --
broken_sasl_auth_clients = yes
smtpd_sasl_auth_enable = yes
smtpd_sasl_local_domain =
smtpd_sasl_security_options = noanonymous
smtpd_tls_cert_file = /etc/postfix/smtpd.cert
smtpd_tls_key_file = /etc/postfix/smtpd.key
smtpd_tls_loglevel = 3
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
smtpd_use_tls = yes
-- listing of /usr/lib/sasl2 --
total 796
drwxr-xr-x 2 root root 4096 2007-03-12 10:06 .
drwxr-xr-x 58 root root 16384 2007-03-12 10:06 ..
-rw-r--r-- 1 root root 13304 2006-12-13 22:26 libanonymous.a
-rw-r--r-- 1 root root 855 2006-12-13 22:26 libanonymous.la
-rw-r--r-- 1 root root 12844 2006-12-13 22:26 libanonymous.so
-rw-r--r-- 1 root root 12844 2006-12-13 22:26 libanonymous.so.2
-rw-r--r-- 1 root root 12844 2006-12-13 22:26 libanonymous.so.2.0.22
-rw-r--r-- 1 root root 15502 2006-12-13 22:26 libcrammd5.a
-rw-r--r-- 1 root root 841 2006-12-13 22:26 libcrammd5.la
-rw-r--r-- 1 root root 15052 2006-12-13 22:26 libcrammd5.so
-rw-r--r-- 1 root root 15052 2006-12-13 22:26 libcrammd5.so.2
-rw-r--r-- 1 root root 15052 2006-12-13 22:26 libcrammd5.so.2.0.22
-rw-r--r-- 1 root root 46320 2006-12-13 22:26 libdigestmd5.a
-rw-r--r-- 1 root root 864 2006-12-13 22:26 libdigestmd5.la
-rw-r--r-- 1 root root 43040 2006-12-13 22:26 libdigestmd5.so
-rw-r--r-- 1 root root 43040 2006-12-13 22:26 libdigestmd5.so.2
-rw-r--r-- 1 root root 43040 2006-12-13 22:26 libdigestmd5.so.2.0.22
-rw-r--r-- 1 root root 13482 2006-12-13 22:26 liblogin.a
-rw-r--r-- 1 root root 835 2006-12-13 22:26 liblogin.la
-rw-r--r-- 1 root root 13384 2006-12-13 22:26 liblogin.so
-rw-r--r-- 1 root root 13384 2006-12-13 22:26 liblogin.so.2
-rw-r--r-- 1 root root 13384 2006-12-13 22:26 liblogin.so.2.0.22
-rw-r--r-- 1 root root 29300 2006-12-13 22:26 libntlm.a
-rw-r--r-- 1 root root 829 2006-12-13 22:26 libntlm.la
-rw-r--r-- 1 root root 28776 2006-12-13 22:26 libntlm.so
-rw-r--r-- 1 root root 28776 2006-12-13 22:26 libntlm.so.2
-rw-r--r-- 1 root root 28776 2006-12-13 22:26 libntlm.so.2.0.22
-rw-r--r-- 1 root root 13818 2006-12-13 22:26 libplain.a
-rw-r--r-- 1 root root 835 2006-12-13 22:26 libplain.la
-rw-r--r-- 1 root root 13992 2006-12-13 22:26 libplain.so
-rw-r--r-- 1 root root 13992 2006-12-13 22:26 libplain.so.2
-rw-r--r-- 1 root root 13992 2006-12-13 22:26 libplain.so.2.0.22
-rw-r--r-- 1 root root 21726 2006-12-13 22:26 libsasldb.a
-rw-r--r-- 1 root root 856 2006-12-13 22:25 libsasldb.la
-rw-r--r-- 1 root root 17980 2006-12-13 22:26 libsasldb.so
-rw-r--r-- 1 root root 17980 2006-12-13 22:26 libsasldb.so.2
-rw-r--r-- 1 root root 17980 2006-12-13 22:26 libsasldb.so.2.0.22
-rw-r--r-- 1 root root 23576 2006-12-13 22:26 libsql.a
-rw-r--r-- 1 root root 964 2006-12-13 22:26 libsql.la
-rw-r--r-- 1 root root 23072 2006-12-13 22:26 libsql.so
-rw-r--r-- 1 root root 23072 2006-12-13 22:26 libsql.so.2
-rw-r--r-- 1 root root 23072 2006-12-13 22:26 libsql.so.2.0.22
-- content of /etc/postfix/sasl/smtpd.conf --
pwcheck_method: saslauthd
mech_list: plain login
allow_plaintext: true
auxprop_plugin: sql
sql_hostnames: 127.0.0.1
sql_user: --- replaced ---
sql_passwd: --- replaced ---
sql_database: mail
sql_select: select password from users where email = '%u'
#saslauthd_path: /var/run/saslauthd
-- active services in /etc/postfix/master.cf --
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (yes) (never) (100)
smtp inet n - - - - smtpd
pickup fifo n - - 60 1 pickup
cleanup unix n - - - 0 cleanup
qmgr fifo n - n 300 1 qmgr
tlsmgr unix - - - 1000? 1 tlsmgr
rewrite unix - - - - - trivial-rewrite
bounce unix - - - - 0 bounce
defer unix - - - - 0 bounce
trace unix - - - - 0 bounce
verify unix - - - - 1 verify
flush unix n - - 1000? 0 flush
proxymap unix - - n - - proxymap
smtp unix - - - - - smtp
relay unix - - - - - smtp
-o fallback_relay=
showq unix n - - - - showq
error unix - - - - - error
discard unix - - - - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - - - - lmtp
anvil unix - - - - 1 anvil
scache unix - - - - 1 scache
maildrop unix - n n - - pipe
flags=Rhu user=vmail argv=/usr/local/bin/maildrop -d ${recipient}
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail
($recipient)
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender
$recipient
scalemail-backend unix - n n - 2 pipe
flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store
${nexthop} ${user} ${extension}
mailman unix - n n - - pipe
flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
${nexthop} ${user}
-- mechanisms on localhost --
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
-- end of saslfinger output --
Thanks,
Nicolas
