password verification verify password of a user for only first 8 characters
Helo ,
I m using linux pam library for user and its password authentication.
I m creating new user and giving its password.I m giving password of 10 characters.now when I login in as that newly created user its ask me
$ su - ram
Password:
You are required to change your password immediately (root enforced)
Changing password for ram
(current) UNIX password:
I m giving my current passwd
(new) Password :
I m giving my new passwd of 10 characters.
Now i m log off and again login as that user
Now when I give my password more only first 8 characters then also It allows me to login
how come this happen?
I also observed that it verify the password for first 8 characters.
also see my /etc/pam.d/system-auth entry are given bewlo
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth required /lib/security/$ISA/pam_env.so
auth sufficient /lib/security/$ISA/pam_unix.so likeauth nullok
auth required /lib/security/$ISA/pam_deny.so
Sorry buddy for the delayed response. Can you do an ls -l on this dir:
/etc/pam.d
I'm looking for /etc/pam.d/common-password file. Anyhow, I'm guessing that this line in /etc/pam.d/system-auth may be the key:
I'll try to find out more on it.
I think I'm pretty sure that you can set the password limit here, in your /etc/pam.d/login file (you will have to add this line below):
You can change max value to whatever you want. Going through man pages, max is not documented, but the functionality is there. Also, before any changes make sure you backup your files.
I think I'm pretty sure that you can set the password limit here, in your /etc/pam.d/login file (you will have to add this line below):
You can change max value to whatever you want. Going through man pages, max is not documented, but the functionality is there. Also, before any changes make sure you backup your files.
-Nitin
Hi Nitin thx for your reply.
/etc/pam.d/passwd file contains following(its passwd file not common-passwd)
#%PAM-1.0
# This file is auto-generated.
# User changes will be destroyed the next time authconfig is run.
auth required /lib/security/$ISA/pam_env.so
auth sufficient /lib/security/$ISA/pam_unix.so likeauth nullok
auth required /lib/security/$ISA/pam_deny.so
My problem is that suppose create a user and give a 12 character password . It will accept this password.
But when I logg off and again login and now I give first 8 character then only It will accept password. So it menas it validates only first 8 character.
yr help will be highly appreciated.
Regards,
Amit
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