is on a NFS partion without root read access. Also, flip euid again for
the duration of the chdir() to the homedir for the same reason.
PR: 5145
Submitted by: Joel.Faedi@esial.u-nancy.fr
Also tested by: A Joseph Koshy <koshy@india.hp.com>
for some DES passwords
crypt(real_password, salt)
is equal to
crypt("", salt);
It means that this user (and not only he) can login without
entering password at all, just pressing Return.
So if empty password entered and crypted password is not empty,
invalidate any crypt result by assigning ":"
Otherwise, when pressing the INT ke at the password prompt, the password
will be displayed. Now login will be killed.
Probably the same will have to be done for the LOGIN_CAP_AUTH case.
I have not done that.
Reviewed by: Joerg Wunsch
Cleanup of #ifdef's for LOGIN_CAP.
Fixed bug in empty shell (closes PR#2550).
Refused root logins now displays standard "Login incorrect" and
exhibits identical backoff behaviour to a failed login.
Cleaned up logging of refused logins.
Use #defines for login retries and backoff. Also implemented
definable variables if LOGIN_CAP is defined, with
"login-retries" and "login-backoff" as capabilities
in the default class (closes PR#2805).
TERM from previous environment is no longer truncated.
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
Note that LOGIN_CAP_AUTH code (login authentication) is not (yet) enabled
and requires /usr/libexec/login_<style> authentication program support to
be added at a later date. The Makefile contains a macro LC_AUTH to turn
it on and prevent unnecessarily linking against skey/krb libs and the
addition of klogin.c module.
All other aspects of login_cap support are fully functional.
libskey contains references to _crypt and can't resolve it unless
-lcrypt occurs after it in the link command. This only occurs when
linking statically.
1) Don't spit out an error message if Kerberos is installed but not yet
set up.
2) Don't attempt to verify the ticket you got back, as workstations
are not intended to have srvtab files of their own.
Both behaviors can be re-enabled with KLOGIN_PARANOID.
