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/*
* auth.c -- PAM authorization code, common between chsh and chfn
* (c) 2012 by Cody Maloney <cmaloney@theoreticalchaos.com>
*
* this program is free software. you can redistribute it and
* modify it under the terms of the gnu general public license.
* there is no warranty.
*
*/
#include "auth.h"
#include "pamfail.h"
int auth_pam(const char *service_name, uid_t uid, const char *username) {
#ifdef REQUIRE_PASSWORD
if (uid != 0) {
pam_handle_t *pamh = NULL;
struct pam_conv conv = { misc_conv, NULL };
int retcode;
retcode = pam_start(service_name, username, &conv, &pamh);
if (pam_fail_check(pamh, retcode))
return FALSE;
retcode = pam_authenticate(pamh, 0);
if (pam_fail_check(pamh, retcode))
return FALSE;
retcode = pam_acct_mgmt(pamh, 0);
if (retcode == PAM_NEW_AUTHTOK_REQD)
retcode =
pam_chauthtok(pamh, PAM_CHANGE_EXPIRED_AUTHTOK);
if (pam_fail_check(pamh, retcode))
return FALSE;
retcode = pam_setcred(pamh, 0);
if (pam_fail_check(pamh, retcode))
return FALSE;
pam_end(pamh, 0);
/* no need to establish a session; this isn't a
* session-oriented activity... */
}
return TRUE;
#endif /* REQUIRE_PASSWORD */
}
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