- make LOGIN_CAP mandatory
- eliminate global pamh - use setusercontext() properly (ideas borrowed from FreeBSD) - remove stray debugging. This now works.
This commit is contained in:
christos
parent
6b47b9b52a
commit
81b53d0cfa
|
|
@ -1,4 +1,4 @@
|
|||
/* $NetBSD: su_pam.c,v 1.1 2005/01/10 03:11:50 christos Exp $ */
|
||||
/* $NetBSD: su_pam.c,v 1.2 2005/01/10 23:33:53 christos Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 1988 The Regents of the University of California.
|
||||
|
|
@ -40,7 +40,7 @@ __COPYRIGHT(
|
|||
#if 0
|
||||
static char sccsid[] = "@(#)su.c 8.3 (Berkeley) 4/2/94";*/
|
||||
#else
|
||||
__RCSID("$NetBSD: su_pam.c,v 1.1 2005/01/10 03:11:50 christos Exp $");
|
||||
__RCSID("$NetBSD: su_pam.c,v 1.2 2005/01/10 23:33:53 christos Exp $");
|
||||
#endif
|
||||
#endif /* not lint */
|
||||
|
||||
|
|
@ -60,17 +60,13 @@ __RCSID("$NetBSD: su_pam.c,v 1.1 2005/01/10 03:11:50 christos Exp $");
|
|||
#include <time.h>
|
||||
#include <tzfile.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#ifdef LOGIN_CAP
|
||||
#include <login_cap.h>
|
||||
#endif
|
||||
|
||||
#include <security/pam_appl.h>
|
||||
#include <security/openpam.h> /* for openpam_ttyconv() */
|
||||
|
||||
|
||||
static pam_handle_t *pamh = NULL;
|
||||
static const struct pam_conv pamc = { &openpam_ttyconv, NULL };
|
||||
|
||||
static int chshell(const char *);
|
||||
static char *ontty(void);
|
||||
|
||||
|
|
@ -91,7 +87,7 @@ main(int argc, char **argv)
|
|||
struct passwd *pwd;
|
||||
char *p;
|
||||
uid_t ruid;
|
||||
int asme, ch, asthem, fastlogin, prio, gohome;
|
||||
int asme, ch, asthem, fastlogin, prio, gohome, setwhat;
|
||||
enum { UNSET, YES, NO } iscsh = UNSET;
|
||||
char *user, *shell, *avshell, *username, **np;
|
||||
char *class;
|
||||
|
|
@ -101,9 +97,8 @@ main(int argc, char **argv)
|
|||
char *tty;
|
||||
const char *func;
|
||||
const void *newuser;
|
||||
#ifdef LOGIN_CAP
|
||||
login_cap_t *lc;
|
||||
#endif
|
||||
pam_handle_t *pamh = NULL;
|
||||
#ifdef PAM_DEBUG
|
||||
extern int _openpam_debug;
|
||||
_openpam_debug = 1;
|
||||
|
|
@ -114,11 +109,9 @@ main(int argc, char **argv)
|
|||
shell = class = NULL;
|
||||
while ((ch = getopt(argc, argv, ARGSTR)) != -1)
|
||||
switch((char)ch) {
|
||||
#ifdef LOGIN_CAP
|
||||
case 'c':
|
||||
class = optarg;
|
||||
break;
|
||||
#endif
|
||||
case 'd':
|
||||
asme = 0;
|
||||
asthem = 1;
|
||||
|
|
@ -263,7 +256,6 @@ main(int argc, char **argv)
|
|||
err args; \
|
||||
} while (/* CONSTOCOND */0)
|
||||
|
||||
#ifdef LOGIN_CAP
|
||||
/* force the usage of specified class */
|
||||
if (class) {
|
||||
if (ruid)
|
||||
|
|
@ -271,9 +263,9 @@ main(int argc, char **argv)
|
|||
|
||||
pwd->pw_class = class;
|
||||
}
|
||||
|
||||
if ((lc = login_getclass(pwd->pw_class)) == NULL)
|
||||
ERRX_PAM_END((1, "Unknown class %s\n", pwd->pw_class));
|
||||
#endif
|
||||
|
||||
if (asme) {
|
||||
/* if asme and non-standard target shell, must be root */
|
||||
|
|
@ -297,26 +289,15 @@ main(int argc, char **argv)
|
|||
iscsh = strstr(avshell, "csh") ? YES : NO;
|
||||
|
||||
/*
|
||||
* Set permissions. We change the user credentials (UID) here
|
||||
* XXX PAM should come before LOGIN_CAP so that the class
|
||||
* specified through -c can override PAM. But as we might drop
|
||||
* root UID on both operations, it is not possible to do that.
|
||||
* If a login class was specified, skip PAM.
|
||||
* Initialize the supplemental groups before pam gets to them,
|
||||
* so that other pam modules get a chance to add more when
|
||||
* we do setcred. Note, we don't relinguish our set-userid yet
|
||||
*/
|
||||
#ifdef LOGIN_CAP
|
||||
if (class) {
|
||||
if (setusercontext(lc, pwd, pwd->pw_uid,
|
||||
(asthem ? (LOGIN_SETPRIORITY | LOGIN_SETUMASK) : 0) |
|
||||
LOGIN_SETRESOURCES | LOGIN_SETGROUP | LOGIN_SETUSER))
|
||||
if (setusercontext(lc, pwd, pwd->pw_uid, LOGIN_SETGROUP) < 0)
|
||||
ERR_PAM_END((1, "setting user context"));
|
||||
printf("%d %d\n", asthem, pwd->pw_uid);
|
||||
} else
|
||||
#endif
|
||||
{
|
||||
pam_err = pam_setcred(pamh, PAM_ESTABLISH_CRED);
|
||||
if (pam_err != PAM_SUCCESS)
|
||||
|
||||
if ((pam_err = pam_setcred(pamh, PAM_ESTABLISH_CRED)) != PAM_SUCCESS)
|
||||
PAM_END("pam_setcred");
|
||||
}
|
||||
|
||||
/*
|
||||
* Manage session.
|
||||
|
|
@ -432,12 +413,8 @@ main(int argc, char **argv)
|
|||
free(pamenv);
|
||||
}
|
||||
|
||||
#ifdef LOGIN_CAP
|
||||
if (setusercontext(lc, pwd, pwd->pw_uid, LOGIN_SETPATH))
|
||||
err(1, "setting user context");
|
||||
#else
|
||||
(void)setenv("PATH", _PATH_DEFPATH, 1);
|
||||
#endif
|
||||
if (p)
|
||||
(void)setenv("TERM", p, 1);
|
||||
if (gohome && chdir(pwd->pw_dir) < 0)
|
||||
|
|
@ -477,10 +454,23 @@ main(int argc, char **argv)
|
|||
syslog(LOG_NOTICE, "%s to %s%s",
|
||||
username, pwd->pw_name, ontty());
|
||||
|
||||
/* Raise our priority back to what we had before */
|
||||
(void)setpriority(PRIO_PROCESS, 0, prio);
|
||||
/*
|
||||
* Set user context, except for umask, and the stuff
|
||||
* we have done before.
|
||||
*/
|
||||
setwhat = LOGIN_SETALL & ~(LOGIN_SETENV|LOGIN_SETUMASK|
|
||||
LOGIN_SETLOGIN|LOGIN_SETPATH|LOGIN_SETGROUP);
|
||||
|
||||
/*
|
||||
* Don't touch resource/priority settings if -m has been used
|
||||
* or -l and -c hasn't, and we're not su'ing to root.
|
||||
*/
|
||||
if ((asme || (!asthem && class == NULL)) && pwd->pw_uid)
|
||||
setwhat &= ~(LOGIN_SETPRIORITY|LOGIN_SETRESOURCES);
|
||||
|
||||
if (setusercontext(lc, pwd, pwd->pw_uid, setwhat) == -1)
|
||||
err(1, "setusercontext");
|
||||
|
||||
printf("%d %d\n", geteuid(), getuid());
|
||||
(void)execv(shell, np);
|
||||
err(1, "%s", shell);
|
||||
done:
|
||||
|
|
|
|||
Loading…
Reference in New Issue