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/* pam_warn module */
/*
* $Id: pam_warn.c,v 1.2 1997/02/15 17:19:08 morgan Exp $
*
* Written by Andrew Morgan <morgan@parc.power.net> 1996/3/11
*
* $Log: pam_warn.c,v $
* Revision 1.2 1997/02/15 17:19:08 morgan
* corrected many bugs and removed fixed buffer logging
*
* Revision 1.1 1996/12/01 03:12:22 morgan
* Initial revision
*
*
*/
#include <stdio.h>
#include <unistd.h>
#include <syslog.h>
#include <stdarg.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
#define PAM_SM_PASSWORD
#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-warn", LOG_CONS|LOG_PID, LOG_AUTH);
vsyslog(err, format, args);
va_end(args);
closelog();
}
/* --- authentication management functions (only) --- */
PAM_EXTERN
int pam_sm_authenticate(pam_handle_t *pamh, int flags, int argc
, const char **argv)
{
const char *service=NULL, *user=NULL, *terminal=NULL
, *rhost=NULL, *ruser=NULL;
(void) pam_get_item(pamh, PAM_SERVICE, (const void **)&service);
(void) pam_get_item(pamh, PAM_TTY, (const void **)&terminal);
_pam_log(LOG_NOTICE, "service: %s [on terminal: %s]"
, service ? service : "<unknown>"
, terminal ? terminal : "<unknown>"
);
(void) pam_get_user(pamh, &user, "Who are you? ");
(void) pam_get_item(pamh, PAM_RUSER, (const void **)&ruser);
(void) pam_get_item(pamh, PAM_RHOST, (const void **)&rhost);
_pam_log(LOG_NOTICE, "user: (uid=%d) -> %s [remote: %s@%s]"
, getuid()
, user ? user : "<unknown>"
, ruser ? ruser : "?nobody"
, rhost ? rhost : "?nowhere"
);
/* we are just a fly on the wall */
return PAM_IGNORE;
}
PAM_EXTERN
int pam_sm_setcred(pam_handle_t *pamh,int flags,int argc
, const char **argv)
{
return PAM_IGNORE;
}
/* password updating functions */
PAM_EXTERN
int pam_sm_chauthtok(pam_handle_t *pamh,int flags,int argc
, const char **argv)
{
/* map to the authentication function... */
return pam_sm_authenticate(pamh, flags, argc, argv);
}
#ifdef PAM_STATIC
/* static module data */
struct pam_module _pam_warn_modstruct = {
"pam_warn",
pam_sm_authenticate,
pam_sm_setcred,
NULL,
NULL,
NULL,
pam_sm_chauthtok,
};
#endif
/* end of module definition */
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