check Linux password from /etc/shadow and C language
Hi.
I want to write a C Program that get a user name and password , then compare it with encrypted password in /etc/shadow.
I start with below program:
Does anyone know how to remove a stanza in the shadow password file if the user account has already been removed on an AIX box? I know it can be done by editing the file itself but I would prefer not to do it that way.
cheers
gizaa (2 Replies)
Hi,
I want to append password into /etc/shadow file using a shell script.
My below script does add the users to both /etc/passwd and /etc/shadow but how can I add the hordcoded passwords to /etc/shadow file can some one help me ?
# To add the groups into /etc/group file
for a_user... (5 Replies)
hi,
I had to reset a lost root password by editing the /etc/passwd and /etc/shadow files ( this is a xen vm file, so i mounted and chrooted the file )
after the reboot with an empty password on root , i have set a new password with passwd but
it only changed the /etc/passwd file.... (0 Replies)
We are currently using a script to copy the same encrypted password between our HP-UX and Solaris servers editing the trusted and shadow files directly. The encrypted password is only 13 characters long on both servers and decrypts the same way. Is there a way to copy this same string to Linux... (5 Replies)
Hello,
I want to know the reason behing the scene why some systems have hashed password in /etc/shadow file as "x" not the alienoid language like A1Dksxi3kaA.. (13 characters)
As far as I understand, etc/password will show password as "x" and move all hashed password to etc/shadow.... (8 Replies)
Hi
I wonder whether is possible to generate enrypted passwd for some user and paste it into /etc/shadow file ?
What kind of encryption is used in /etc/shadow file ?
ths for help. (1 Reply)
Today i was going through some of security guides written on linux .
Under shadow file security following points were mentioned.
1)The encrypted password stored under /etc/shadow file should have more than 14-25 characters.
2)Usernames in shadow file must satisfy to all the same rules as... (14 Replies)
Hello,
I have to do a script which returns users who have never changed their password from /etc/shadow.
Here is what have I done and I'm not sure if it's ok.
I tried to return just users who doesn;t have password set or are locked.
Can be there other kind of user who never changed the... (3 Replies)
i have an application that uses the encrypted password that's in the /etc/shadow file.
i copied the line for the particular username i was interested it in from shadow file and i pasted it into the password file of the application. the application is nagios.
this application allowed that... (5 Replies)
Discussion started by: SkySmart
5 Replies
LEARN ABOUT HPUX
crypt_r
crypt(3C)crypt(3C)NAME
crypt - generate hashing encryption
SYNOPSIS
Obsolescent Interfaces
DESCRIPTION
crypt():
is the password encryption function. It is based on a one way hashing encryption algorithm with variations intended (among other things)
to frustrate use of hardware implementations of a key search.
key is a user's typed password. salt is a two-character string chosen from the set this string is used to perturb the hashing algorithm in
one of 4096 different ways, after which the password is used as the key to encrypt repeatedly a constant string. The returned value points
to the encrypted password. The first two characters are the salt itself.
Obsolescent Interfaces
generate hashing encryption.
WARNINGS
The return value for points to data whose content is overwritten by each call.
and are obsolescent interfaces supported only for compatibility with existing DCE applications. New multithreaded applications should use
SEE ALSO crypt(1), login(1), passwd(1), getpass(3C), passwd(4), thread_safety(5).
STANDARDS CONFORMANCE crypt(3C)
10-31-2008
