The pam_sm_setcred function
is the service module's implementation of the pam_setcred(3)
interface.
This function performs the task of altering the credentials of the user with respect to the corresponding authorization scheme. Generally, an authentication module may have access to more information about a user than their authentication token. This function is used to make such information available to the application. It should only be called after the user has been authenticated but before a session has been established.
Valid flags, which may be logically OR'd with PAM_SILENT, are:
Do not emit any messages.
Initialize the credentials for the user.
Delete the credentials associated with the authentication service.
Reinitialize the user credentials.
Extend the lifetime of the user credentials.
The way the auth
stack is navigated in order to evaluate the pam_setcred() function call, independent of
the pam_sm_setcred() return
codes, is exactly the same way that it was navigated when
evaluating the pam_authenticate() library call. Typically,
if a stack entry was ignored in evaluating pam_authenticate(), it will be ignored when
libpam evaluates the pam_setcred() function call. Otherwise, the
return codes from each module specific pam_sm_setcred() call are treated as
required.
This module cannot retrieve the user's credentials.
The user's credentials have expired.
This module was unable to set the credentials of the user.
The user credential was successfully set.
The user is not known to this authentication module.
These, non-PAM_SUCCESS, return values will
typically lead to the credential stack failing. The first such error will
dominate in the return value of pam_setcred().
pam(3), pam_authenticate(3), pam_setcred(3), pam_sm_authenticate(3), pam_strerror(3), PAM(8)
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See Linux-PAM copyright notice for more information.
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