.\"     Title: pam_sm_setcred
.\"    Author: 
.\" Generator: DocBook XSL Stylesheets v1.73.1 <http://docbook.sf.net/>
.\"      Date: 04/16/2008
.\"    Manual: Linux-PAM Manual
.\"    Source: Linux-PAM Manual
.\"
.TH "PAM_SM_SETCRED" "3" "04/16/2008" "Linux-PAM Manual" "Linux-PAM Manual"
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.SH "NAME"
pam_sm_setcred - PAM service function to alter credentials
.SH "SYNOPSIS"
.sp
.ft B
.nf
#define PAM_SM_AUTH
.fi
.ft
.sp
.ft B
.nf
#include <security/pam_modules\.h>
.fi
.ft
.HP 30
.BI "PAM_EXTERN int pam_sm_setcred(pam_handle_t\ *" "pamh" ", int\ " "flags" ", int\ " "argc" ", const\ char\ **" "argv" ");"
.SH "DESCRIPTION"
.PP
The
\fBpam_sm_setcred\fR
function is the service module\'s implementation of the
\fBpam_setcred\fR(3)
interface\.
.PP
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
\fIafter\fR
the user has been authenticated but before a session has been established\.
.PP
Valid flags, which may be logically OR\'d with
\fIPAM_SILENT\fR, are:
.PP
PAM_SILENT
.RS 4
Do not emit any messages\.
.RE
.PP
PAM_DELETE_CRED
.RS 4
Delete the credentials associated with the authentication service\.
.RE
.PP
PAM_REINITIALIZE_CRED
.RS 4
Reinitialize the user credentials\.
.RE
.PP
PAM_REFRESH_CRED
.RS 4
Extend the lifetime of the user credentials\.
.RE
.PP
The way the
\fBauth\fR
stack is navigated in order to evaluate the
\fBpam_setcred\fR() function call, independent of the
\fBpam_sm_setcred\fR() return codes, is exactly the same way that it was navigated when evaluating the
\fBpam_authenticate\fR() library call\. Typically, if a stack entry was ignored in evaluating
\fBpam_authenticate\fR(), it will be ignored when libpam evaluates the
\fBpam_setcred\fR() function call\. Otherwise, the return codes from each module specific
\fBpam_sm_setcred\fR() call are treated as
\fBrequired\fR\.
.SH "RETURN VALUES"
.PP
PAM_CRED_UNAVAIL
.RS 4
This module cannot retrieve the user\'s credentials\.
.RE
.PP
PAM_CRED_EXPIRED
.RS 4
The user\'s credentials have expired\.
.RE
.PP
PAM_CRED_ERR
.RS 4
This module was unable to set the credentials of the user\.
.RE
.PP
PAM_SUCCESS
.RS 4
The user credential was successfully set\.
.RE
.PP
PAM_USER_UNKNOWN
.RS 4
The user is not known to this authentication module\.
.RE
.PP
These, non\-\fIPAM_SUCCESS\fR, return values will typically lead to the credential stack
\fIfailing\fR\. The first such error will dominate in the return value of
\fBpam_setcred\fR()\.
.SH "SEE ALSO"
.PP

\fBpam\fR(3),
\fBpam_authenticate\fR(3),
\fBpam_setcred\fR(3),
\fBpam_sm_authenticate\fR(3),
\fBpam_strerror\fR(3),
\fBPAM\fR(8)