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/* pam_rootok module */
/*
* $Id$
*
* Written by Andrew Morgan <morgan@linux.kernel.org> 1996/3/11
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <unistd.h>
#include <syslog.h>
#include <stdarg.h>
#include <string.h>
/*
* here, we make a definition for the externally accessible function
* in this file (this definition is required for static a module
* but strongly encouraged generally) it is used to instruct the
* modules include file to define the function prototypes.
*/
#define PAM_SM_AUTH
#include <security/pam_modules.h>
/* some syslogging */
static void _pam_log(int err, const char *format, ...)
{
va_list args;
va_start(args, format);
openlog("PAM-rootok", LOG_CONS|LOG_PID, LOG_AUTH);
vsyslog(err, format, args);
va_end(args);
closelog();
}
#ifdef WITH_SELINUX
#include <selinux/selinux.h>
#include <selinux/av_permissions.h>
#endif
/* argument parsing */
#define PAM_DEBUG_ARG 01
static int _pam_parse(int argc, const char **argv)
{
int ctrl=0;
/* step through arguments */
for (ctrl=0; argc-- > 0; ++argv) {
/* generic options */
if (!strcmp(*argv,"debug"))
ctrl |= PAM_DEBUG_ARG;
else {
_pam_log(LOG_ERR,"pam_parse: unknown option; %s",*argv);
}
}
return ctrl;
}
/* --- authentication management functions (only) --- */
PAM_EXTERN
int pam_sm_authenticate(pam_handle_t *pamh,int flags,int argc
,const char **argv)
{
int ctrl;
int retval = PAM_AUTH_ERR;
ctrl = _pam_parse(argc, argv);
if (getuid() == 0)
#ifdef WITH_SELINUX
if (is_selinux_enabled()<1 || checkPasswdAccess(PASSWD__ROOTOK)==0)
#endif
retval = PAM_SUCCESS;
if (ctrl & PAM_DEBUG_ARG) {
_pam_log(LOG_DEBUG, "authentication %s"
, retval==PAM_SUCCESS ? "succeeded":"failed" );
}
return retval;
}
PAM_EXTERN
int pam_sm_setcred(pam_handle_t *pamh,int flags,int argc
,const char **argv)
{
return PAM_SUCCESS;
}
#ifdef PAM_STATIC
/* static module data */
struct pam_module _pam_rootok_modstruct = {
"pam_rootok",
pam_sm_authenticate,
pam_sm_setcred,
NULL,
NULL,
NULL,
NULL,
};
#endif
/* end of module definition */
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