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Re: openssh + pam authentication failing +md5 (?!) HELP HELP HELP !



Hello Steve,all

I added the debug option the password rule and the auth rule in the sshd pam file, but as far as i can see nothing was sent to the logs, i mean messages and warn logs, unless i should check some other log which i cannot see at the moment ??

But i think i found the problem but if it is real then i still don't know what i can do:

I changed the password of the user 'testuser' with some other tool which doesn't create md5 passwords. 

Then i tried again ssh and now i can login, but 2 things i conclude now:  1. ssh lets me , i only need the first 8 chars to enter
      2. it seems that when it's md5 encrypted then authentication
         fails.

these are logs of what i just did to get in:

[from the ssh remote side]

debug1: PAM establishing creds

Environment:
  USER=testuser
  LOGNAME=testuser
  HOME=/home/testuser
  PATH=/usr/bin:/bin:/usr/sbin:/sbin:/opt/bin
  MAIL=/var/mail/testuser
  SHELL=/bin/bash
  SSH_CLIENT= 192.168.200.30 33029 22
  SSH_TTY=/dev/pts/7
  TERM=kvt
debug3: channel_close_fds: channel 0: r -1 w -1 e -1
testuser@sp32a:~ >

[this is what sshd -d -d -d shows]
debug1: PAM Password authentication accepted for user "testuser"
Accepted password for testuser from 192.168.200.30 port 33030 ssh2
debug1: Entering interactive session for SSH2.
debug1: fd 3 setting O_NONBLOCK
debug1: fd 7 setting O_NONBLOCK
debug1: server_init_dispatch_20
debug1: server_input_channel_open: ctype session rchan 0 win 65536 max 16384
debug1: input_session_request
debug1: channel 0: new [server-session]
debug1: session_new: init
debug1: session_new: session 0
debug1: session_open: channel 0
debug1: session_open: session 0: link with channel 0
debug1: server_input_channel_open: confirm session
debug1: server_input_channel_req: channel 0 request pty-req reply 0
debug1: session_by_channel: session 0 channel 0
debug1: session_input_channel_req: session 0 req pty-req
debug1: Allocating pty.


Well, i hope we made some progress to a solution, please let me know if you need more information.

Thanks !








> Steve Langasek <vorlon@netexpress.net> pam-list@redhat.com Re: openssh + pam authentication failing +md5 (?!) HELP HELP HELP !Reply-To: pam-list@redhat.com
>Date: Mon, 6 May 2002 09:29:48 -0500
>
>On Fri, May 03, 2002 at 11:10:01AM -0700, light storm wrote:
>
>> First of all thanks for anytime you put in my problem, really
>> appreciate all the help cause i just don't see it :(
>
>> I'll paste here the additional information which might help solve this:
>
>> (note: openssh was compiled with pam support and md5 support)
>
>> sshd pam file for openssh in /etc/pam.d/
>
>Have you checked your log files for anything that might tell you which
>PAM module is failing and why?  pam_unix, at least, logs a fair amount
>of information to the syslog 'auth' facility, and more information is 
>available if you add the 'debug' flag to the module arguments
>
>  auth     required     /lib/security/pam_unix.so debug
>
>Your openssh debug output indicates that PAM is being invoked, and your 
>PAM config file looks reasonable from what I can tell; so looking at 
>logs would be the next step.
>
>> #%PAM-1.0
>> auth     required       /lib/security/pam_unix.so       # set_secrpc
>> auth     required       /lib/security/pam_nologin.so
>> auth     required       /lib/security/pam_env.so
>> account  required       /lib/security/pam_unix.so
>
>> password required       /lib/security/pam_pwcheck.so    md5
>
>BTW, does pam_pwcheck.so really support this 'md5' argument?  As a quick
>experiment, you might try removing it to see if that changes openssh's
>behavior -- though the effect on the authentication process of a
>misconfigured password module should really be minimal.
>
>Steve Langasek
>postmodern programmer
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