mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-17 10:26:15 +00:00
ATTENTION: INSTALL "/etc/pam.conf" FROM "src/etc"!!!
Change login to use PAM for authentication. I kept the built-in passwd/NIS authentication support, to handle cases where the system is missing its "/etc/pam.conf" file. S/Key and KerberosIV authentication methods are removed from the login program, but still available in PAM modules.
This commit is contained in:
John Polstra
parent
4700eb95cb
commit
e83348169b
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=41279
@ -1,27 +1,15 @@
|
||||
# From: @(#)Makefile 8.1 (Berkeley) 7/19/93
|
||||
# $Id: Makefile,v 1.22 1998/11/11 02:16:01 jdp Exp $
|
||||
# $Id: Makefile,v 1.23 1998/11/11 05:47:45 jdp Exp $
|
||||
|
||||
PROG= login
|
||||
MAN1= login.1
|
||||
MAN5= login.access.5
|
||||
SRCS= login.c login_access.c login_fbtab.c
|
||||
|
||||
CFLAGS+=-Wall -DSKEY -DLOGIN_ACCESS -DLOGALL
|
||||
CFLAGS+=-Wall -DLOGIN_ACCESS -DLOGALL
|
||||
|
||||
.if defined(KLOGIN_PARANOID)
|
||||
CFLAGS+=-DKLOGIN_PARANOID
|
||||
.endif
|
||||
|
||||
DPADD= ${LIBUTIL} ${LIBSKEY} ${LIBMD} ${LIBCRYPT}
|
||||
LDADD= -lutil -lskey -lmd -lcrypt
|
||||
|
||||
.if exists(${DESTDIR}${LIBDIR}/libkrb.a) && defined(MAKE_KERBEROS4)
|
||||
CFLAGS+=-DKERBEROS
|
||||
SRCS+= klogin.c
|
||||
DPADD+= ${LIBKRB} ${LIBDES}
|
||||
LDADD+= -lkrb -ldes
|
||||
DISTRIBUTION= krb
|
||||
.endif
|
||||
DPADD= ${LIBUTIL} ${LIBCRYPT} ${LIBPAM}
|
||||
LDADD= -lutil -lcrypt -lpam
|
||||
|
||||
BINMODE=4555
|
||||
INSTALLFLAGS=-fschg
|
||||
|
||||
@ -1,204 +0,0 @@
|
||||
/*-
|
||||
* Copyright (c) 1990, 1993, 1994
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 3. All advertising materials mentioning features or use of this software
|
||||
* must display the following acknowledgement:
|
||||
* This product includes software developed by the University of
|
||||
* California, Berkeley and its contributors.
|
||||
* 4. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
||||
*/
|
||||
|
||||
#ifndef lint
|
||||
static const char sccsid[] = "@(#)klogin.c 8.3 (Berkeley) 4/2/94";
|
||||
#endif /* not lint */
|
||||
|
||||
#ifdef KERBEROS
|
||||
#include <sys/param.h>
|
||||
#include <sys/syslog.h>
|
||||
#include <des.h>
|
||||
#include <krb.h>
|
||||
|
||||
#include <err.h>
|
||||
#include <netdb.h>
|
||||
#include <pwd.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <unistd.h>
|
||||
|
||||
#define INITIAL_TICKET "krbtgt"
|
||||
#define VERIFY_SERVICE "rcmd"
|
||||
|
||||
extern int notickets;
|
||||
extern char *krbtkfile_env;
|
||||
|
||||
/*
|
||||
* Attempt to log the user in using Kerberos authentication
|
||||
*
|
||||
* return 0 on success (will be logged in)
|
||||
* 1 if Kerberos failed (try local password in login)
|
||||
*/
|
||||
int
|
||||
klogin(pw, instance, localhost, password)
|
||||
struct passwd *pw;
|
||||
char *instance, *localhost, *password;
|
||||
{
|
||||
int kerror;
|
||||
char realm[REALM_SZ], savehost[MAXHOSTNAMELEN];
|
||||
char tkt_location[MAXPATHLEN];
|
||||
char *krb_get_phost();
|
||||
extern int noticketsdontcomplain;
|
||||
|
||||
#ifdef KLOGIN_PARANOID
|
||||
AUTH_DAT authdata;
|
||||
KTEXT_ST ticket;
|
||||
struct hostent *hp;
|
||||
unsigned long faddr;
|
||||
|
||||
noticketsdontcomplain = 0; /* enable warning message */
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Root logins don't use Kerberos.
|
||||
* If we have a realm, try getting a ticket-granting ticket
|
||||
* and using it to authenticate. Otherwise, return
|
||||
* failure so that we can try the normal passwd file
|
||||
* for a password. If that's ok, log the user in
|
||||
* without issuing any tickets.
|
||||
*/
|
||||
if (strcmp(pw->pw_name, "root") == 0 ||
|
||||
krb_get_lrealm(realm, 0) != KSUCCESS)
|
||||
return (1);
|
||||
|
||||
noticketsdontcomplain = 0; /* enable warning message */
|
||||
|
||||
/*
|
||||
* get TGT for local realm
|
||||
* tickets are stored in a file named TKT_ROOT plus uid
|
||||
* except for user.root tickets.
|
||||
*/
|
||||
|
||||
if (strcmp(instance, "root") != 0)
|
||||
(void)sprintf(tkt_location, "%s%d", TKT_ROOT, pw->pw_uid);
|
||||
else {
|
||||
(void)sprintf(tkt_location, "%s_root_%d", TKT_ROOT, pw->pw_uid);
|
||||
krbtkfile_env = tkt_location;
|
||||
}
|
||||
(void)krb_set_tkt_string(tkt_location);
|
||||
|
||||
/*
|
||||
* Set real as well as effective ID to 0 for the moment,
|
||||
* to make the kerberos library do the right thing.
|
||||
*/
|
||||
if (setuid(0) < 0) {
|
||||
warnx("setuid");
|
||||
return (1);
|
||||
}
|
||||
kerror = krb_get_pw_in_tkt(pw->pw_name, instance,
|
||||
realm, INITIAL_TICKET, realm, DEFAULT_TKT_LIFE, password);
|
||||
|
||||
/*
|
||||
* If we got a TGT, get a local "rcmd" ticket and check it so as to
|
||||
* ensure that we are not talking to a bogus Kerberos server.
|
||||
*
|
||||
* There are 2 cases where we still allow a login:
|
||||
* 1: the VERIFY_SERVICE doesn't exist in the KDC
|
||||
* 2: local host has no srvtab, as (hopefully) indicated by a
|
||||
* return value of RD_AP_UNDEC from krb_rd_req().
|
||||
*/
|
||||
if (kerror != INTK_OK) {
|
||||
if (kerror != INTK_BADPW && kerror != KDC_PR_UNKNOWN) {
|
||||
syslog(LOG_ERR, "Kerberos intkt error: %s",
|
||||
krb_err_txt[kerror]);
|
||||
dest_tkt();
|
||||
}
|
||||
return (1);
|
||||
}
|
||||
|
||||
if (chown(TKT_FILE, pw->pw_uid, pw->pw_gid) < 0)
|
||||
syslog(LOG_ERR, "chown tkfile (%s): %m", TKT_FILE);
|
||||
|
||||
(void)strncpy(savehost, krb_get_phost(localhost), sizeof(savehost));
|
||||
savehost[sizeof(savehost)-1] = NULL;
|
||||
|
||||
#ifdef KLOGIN_PARANOID
|
||||
/*
|
||||
* if the "VERIFY_SERVICE" doesn't exist in the KDC for this host,
|
||||
* still allow login with tickets, but log the error condition.
|
||||
*/
|
||||
|
||||
kerror = krb_mk_req(&ticket, VERIFY_SERVICE, savehost, realm, 33);
|
||||
if (kerror == KDC_PR_UNKNOWN) {
|
||||
syslog(LOG_NOTICE,
|
||||
"warning: TGT not verified (%s); %s.%s not registered, or srvtab is wrong?",
|
||||
krb_err_txt[kerror], VERIFY_SERVICE, savehost);
|
||||
notickets = 0;
|
||||
return (0);
|
||||
}
|
||||
|
||||
if (kerror != KSUCCESS) {
|
||||
warnx("unable to use TGT: (%s)", krb_err_txt[kerror]);
|
||||
syslog(LOG_NOTICE, "unable to use TGT: (%s)",
|
||||
krb_err_txt[kerror]);
|
||||
dest_tkt();
|
||||
return (1);
|
||||
}
|
||||
|
||||
if (!(hp = gethostbyname(localhost))) {
|
||||
syslog(LOG_ERR, "couldn't get local host address");
|
||||
dest_tkt();
|
||||
return (1);
|
||||
}
|
||||
|
||||
memmove((void *)&faddr, (void *)hp->h_addr, sizeof(faddr));
|
||||
|
||||
kerror = krb_rd_req(&ticket, VERIFY_SERVICE, savehost, faddr,
|
||||
&authdata, "");
|
||||
|
||||
if (kerror == KSUCCESS) {
|
||||
notickets = 0;
|
||||
return (0);
|
||||
}
|
||||
|
||||
/* undecipherable: probably didn't have a srvtab on the local host */
|
||||
if (kerror == RD_AP_UNDEC) {
|
||||
syslog(LOG_NOTICE, "krb_rd_req: (%s)\n", krb_err_txt[kerror]);
|
||||
dest_tkt();
|
||||
return (1);
|
||||
}
|
||||
/* failed for some other reason */
|
||||
warnx("unable to verify %s ticket: (%s)", VERIFY_SERVICE,
|
||||
krb_err_txt[kerror]);
|
||||
syslog(LOG_NOTICE, "couldn't verify %s ticket: %s", VERIFY_SERVICE,
|
||||
krb_err_txt[kerror]);
|
||||
dest_tkt();
|
||||
return (1);
|
||||
#else
|
||||
notickets = 0;
|
||||
return (0);
|
||||
#endif
|
||||
}
|
||||
#endif
|
||||
@ -42,7 +42,7 @@ static char copyright[] =
|
||||
static char sccsid[] = "@(#)login.c 8.4 (Berkeley) 4/2/94";
|
||||
#endif
|
||||
static const char rcsid[] =
|
||||
"$Id: login.c,v 1.41 1998/11/11 02:16:01 jdp Exp $";
|
||||
"$Id: login.c,v 1.42 1998/11/11 05:47:45 jdp Exp $";
|
||||
#endif /* not lint */
|
||||
|
||||
/*
|
||||
@ -77,9 +77,8 @@ static const char rcsid[] =
|
||||
#include <unistd.h>
|
||||
#include <utmp.h>
|
||||
|
||||
#ifdef SKEY
|
||||
#include <skey.h>
|
||||
#endif /* SKEY */
|
||||
#include <security/pam_appl.h>
|
||||
#include <security/pam_misc.h>
|
||||
|
||||
#include "pathnames.h"
|
||||
|
||||
@ -96,12 +95,10 @@ char *stypeof __P((char *));
|
||||
void timedout __P((int));
|
||||
int login_access __P((char *, char *));
|
||||
void login_fbtab __P((char *, uid_t, gid_t));
|
||||
#ifdef KERBEROS
|
||||
int klogin __P((struct passwd *, char *, char *, char *));
|
||||
#endif
|
||||
|
||||
static int auth_pam __P((void));
|
||||
static int auth_traditional __P((void));
|
||||
extern void login __P((struct utmp *));
|
||||
extern void trimdomain __P((char *, int));
|
||||
static void usage __P((void));
|
||||
|
||||
#define TTYGRPNAME "tty" /* name of group to own ttys */
|
||||
@ -114,14 +111,6 @@ static void usage __P((void));
|
||||
*/
|
||||
u_int timeout = 300;
|
||||
|
||||
#ifdef KERBEROS
|
||||
int notickets = 1;
|
||||
int noticketsdontcomplain = 1;
|
||||
char *instance;
|
||||
char *krbtkfile_env;
|
||||
int authok;
|
||||
#endif
|
||||
|
||||
struct passwd *pwd;
|
||||
int failures;
|
||||
char *term, *envinit[1], *hostname, *username, *tty;
|
||||
@ -142,18 +131,11 @@ main(argc, argv)
|
||||
int changepass;
|
||||
time_t warntime;
|
||||
uid_t uid, euid;
|
||||
char *domain, *p, *salt, *ttyn;
|
||||
const char *ep;
|
||||
char *domain, *p, *ttyn;
|
||||
char tbuf[MAXPATHLEN + 2], tname[sizeof(_PATH_TTY) + 10];
|
||||
char localhost[MAXHOSTNAMELEN];
|
||||
char *shell = NULL;
|
||||
login_cap_t *lc = NULL;
|
||||
#ifdef SKEY
|
||||
int permit_passwd = 0;
|
||||
#endif /* SKEY */
|
||||
#ifdef KERBEROS
|
||||
char *k;
|
||||
#endif
|
||||
|
||||
(void)signal(SIGALRM, timedout);
|
||||
(void)alarm(timeout);
|
||||
@ -256,14 +238,6 @@ main(argc, argv)
|
||||
}
|
||||
rootlogin = 0;
|
||||
rootok = rootterm(tty); /* Default (auth may change) */
|
||||
#ifdef KERBEROS
|
||||
if ((instance = strchr(username, '.')) != NULL) {
|
||||
if (strncmp(instance, ".root", 5) == 0)
|
||||
rootlogin = 1;
|
||||
*instance++ = '\0';
|
||||
} else
|
||||
instance = "";
|
||||
#endif /* KERBEROS */
|
||||
|
||||
if (strlen(username) > UT_NAMESIZE)
|
||||
username[UT_NAMESIZE] = '\0';
|
||||
@ -281,20 +255,7 @@ main(argc, argv)
|
||||
(void)strncpy(tbuf, username, sizeof tbuf-1);
|
||||
tbuf[sizeof tbuf-1] = '\0';
|
||||
|
||||
if ((pwd = getpwnam(username)) != NULL)
|
||||
salt = pwd->pw_passwd;
|
||||
else
|
||||
salt = "xx";
|
||||
|
||||
/*
|
||||
* Establish the class now, before we might goto
|
||||
* within the next block. pwd can be NULL since it
|
||||
* falls back to the "default" class if it is.
|
||||
*/
|
||||
if (pwd != NULL)
|
||||
(void)seteuid(rootlogin ? 0 : pwd->pw_uid);
|
||||
lc = login_getpwclass(pwd);
|
||||
seteuid(euid);
|
||||
pwd = getpwnam(username);
|
||||
|
||||
/*
|
||||
* if we have a valid account name, and it doesn't have a
|
||||
@ -302,7 +263,6 @@ main(argc, argv)
|
||||
* is root or the caller isn't changing their uid, don't
|
||||
* authenticate.
|
||||
*/
|
||||
rval = 1;
|
||||
if (pwd != NULL) {
|
||||
if (pwd->pw_uid == 0)
|
||||
rootlogin = 1;
|
||||
@ -324,63 +284,31 @@ main(argc, argv)
|
||||
|
||||
(void)setpriority(PRIO_PROCESS, 0, -4);
|
||||
|
||||
#ifdef SKEY
|
||||
permit_passwd = skeyaccess(username, tty,
|
||||
hostname ? full_hostname : NULL,
|
||||
NULL);
|
||||
p = skey_getpass("Password:", pwd, permit_passwd);
|
||||
ep = skey_crypt(p, salt, pwd, permit_passwd);
|
||||
#else /* !SKEY */
|
||||
p = getpass("Password:");
|
||||
ep = crypt(p, salt);
|
||||
#endif/* SKEY */
|
||||
|
||||
if (pwd) {
|
||||
if (!p[0] && pwd->pw_passwd[0])
|
||||
ep = ":";
|
||||
#ifdef KERBEROS
|
||||
#ifdef SKEY
|
||||
/*
|
||||
* Do not allow user to type in kerberos password
|
||||
* over the net (actually, this is ok for encrypted
|
||||
* links, but we have no way of determining if the
|
||||
* link is encrypted.
|
||||
* Try to authenticate using PAM. If a PAM system error
|
||||
* occurs, perhaps because of a botched configuration,
|
||||
* then fall back to using traditional Unix authentication.
|
||||
*/
|
||||
if (!permit_passwd) {
|
||||
rval = 1; /* failed */
|
||||
} else
|
||||
#endif /* SKEY */
|
||||
rval = 1;
|
||||
k = auth_getval("auth_list");
|
||||
if (k && strstr(k, "kerberos"))
|
||||
rval = klogin(pwd, instance, localhost, p);
|
||||
if (rval != 0 && rootlogin && pwd->pw_uid != 0)
|
||||
rootlogin = 0;
|
||||
if (rval == 0)
|
||||
authok = 1; /* kerberos authenticated ok */
|
||||
else if (rval == 1) /* fallback to unix passwd */
|
||||
rval = strcmp(ep, pwd->pw_passwd);
|
||||
#else /* !KERBEROS */
|
||||
rval = strcmp(ep, pwd->pw_passwd);
|
||||
#endif /* KERBEROS */
|
||||
}
|
||||
|
||||
/* clear entered password */
|
||||
memset(p, 0, strlen(p));
|
||||
if ((rval = auth_pam()) == -1)
|
||||
rval = auth_traditional();
|
||||
|
||||
(void)setpriority(PRIO_PROCESS, 0, 0);
|
||||
|
||||
/*
|
||||
* PAM authentication may have changed "pwd" to the
|
||||
* entry for the template user. Check again to see if
|
||||
* this is a root login after all.
|
||||
*/
|
||||
if (pwd != NULL && pwd->pw_uid == 0)
|
||||
rootlogin = 1;
|
||||
|
||||
ttycheck:
|
||||
/*
|
||||
* If trying to log in as root without Kerberos,
|
||||
* but with insecure terminal, refuse the login attempt.
|
||||
*/
|
||||
if (pwd && !rval) {
|
||||
#if defined(KERBEROS)
|
||||
if (authok == 0 && rootlogin && !rootok)
|
||||
#else
|
||||
if (rootlogin && !rootok)
|
||||
#endif
|
||||
refused(NULL, "NOROOT", 0);
|
||||
else /* valid password & authenticated */
|
||||
break;
|
||||
@ -407,6 +335,13 @@ main(argc, argv)
|
||||
|
||||
endpwent();
|
||||
|
||||
/*
|
||||
* Establish the login class.
|
||||
*/
|
||||
(void)seteuid(rootlogin ? 0 : pwd->pw_uid);
|
||||
lc = login_getpwclass(pwd);
|
||||
seteuid(euid);
|
||||
|
||||
/* if user not super-user, check for disabled logins */
|
||||
if (!rootlogin)
|
||||
auth_checknologin(lc);
|
||||
@ -530,11 +465,6 @@ main(argc, argv)
|
||||
if (hostname==NULL && isdialuptty(tty))
|
||||
syslog(LOG_INFO, "DIALUP %s, %s", tty, pwd->pw_name);
|
||||
|
||||
#ifdef KERBEROS
|
||||
if (!quietlog && notickets == 1 && !noticketsdontcomplain)
|
||||
(void)printf("Warning: no Kerberos tickets issued.\n");
|
||||
#endif
|
||||
|
||||
#ifdef LOGALL
|
||||
/*
|
||||
* Syslog each successful login, so we don't have to watch hundreds
|
||||
@ -573,7 +503,12 @@ main(argc, argv)
|
||||
* We don't need to be root anymore, so
|
||||
* set the user and session context
|
||||
*/
|
||||
if (setusercontext(lc, pwd, pwd->pw_uid, LOGIN_SETALL) != 0) {
|
||||
if (setlogin(username) != 0) {
|
||||
syslog(LOG_ERR, "setlogin(%s): %m - exiting", username);
|
||||
exit(1);
|
||||
}
|
||||
if (setusercontext(lc, pwd, pwd->pw_uid,
|
||||
LOGIN_SETALL & ~LOGIN_SETLOGIN) != 0) {
|
||||
syslog(LOG_ERR, "setusercontext() failed - exiting");
|
||||
exit(1);
|
||||
}
|
||||
@ -585,13 +520,9 @@ main(argc, argv)
|
||||
else {
|
||||
(void)setenv("TERM", stypeof(tty), 0); /* Fallback doesn't */
|
||||
}
|
||||
(void)setenv("LOGNAME", pwd->pw_name, 1);
|
||||
(void)setenv("USER", pwd->pw_name, 1);
|
||||
(void)setenv("LOGNAME", username, 1);
|
||||
(void)setenv("USER", username, 1);
|
||||
(void)setenv("PATH", rootlogin ? _PATH_STDPATH : _PATH_DEFPATH, 0);
|
||||
#ifdef KERBEROS
|
||||
if (krbtkfile_env)
|
||||
(void)setenv("KRBTKFILE", krbtkfile_env, 1);
|
||||
#endif
|
||||
|
||||
if (!quietlog) {
|
||||
char *cw;
|
||||
@ -646,6 +577,114 @@ main(argc, argv)
|
||||
err(1, "%s", shell);
|
||||
}
|
||||
|
||||
static int
|
||||
auth_traditional()
|
||||
{
|
||||
int rval;
|
||||
char *p;
|
||||
char *ep;
|
||||
char *salt;
|
||||
|
||||
rval = 1;
|
||||
salt = pwd != NULL ? pwd->pw_passwd : "xx";
|
||||
|
||||
p = getpass("Password:");
|
||||
ep = crypt(p, salt);
|
||||
|
||||
if (pwd) {
|
||||
if (!p[0] && pwd->pw_passwd[0])
|
||||
ep = ":";
|
||||
if (strcmp(ep, pwd->pw_passwd) == 0)
|
||||
rval = 0;
|
||||
}
|
||||
|
||||
/* clear entered password */
|
||||
memset(p, 0, strlen(p));
|
||||
return rval;
|
||||
}
|
||||
|
||||
/*
|
||||
* Attempt to authenticate the user using PAM. Returns 0 if the user is
|
||||
* authenticated, or 1 if not authenticated. If some sort of PAM system
|
||||
* error occurs (e.g., the "/etc/pam.conf" file is missing) then this
|
||||
* function returns -1. This can be used as an indication that we should
|
||||
* fall back to a different authentication mechanism.
|
||||
*/
|
||||
static int
|
||||
auth_pam()
|
||||
{
|
||||
pam_handle_t *pamh = NULL;
|
||||
const char *tmpl_user;
|
||||
const void *item;
|
||||
int rval;
|
||||
int e;
|
||||
static struct pam_conv conv = { misc_conv, NULL };
|
||||
|
||||
if ((e = pam_start("login", username, &conv, &pamh)) != PAM_SUCCESS) {
|
||||
syslog(LOG_ERR, "pam_start: %s", pam_strerror(pamh, e));
|
||||
return -1;
|
||||
}
|
||||
if ((e = pam_set_item(pamh, PAM_TTY, tty)) != PAM_SUCCESS) {
|
||||
syslog(LOG_ERR, "pam_set_item(PAM_TTY): %s",
|
||||
pam_strerror(pamh, e));
|
||||
return -1;
|
||||
}
|
||||
if (hostname != NULL &&
|
||||
(e = pam_set_item(pamh, PAM_RHOST, full_hostname)) != PAM_SUCCESS) {
|
||||
syslog(LOG_ERR, "pam_set_item(PAM_RHOST): %s",
|
||||
pam_strerror(pamh, e));
|
||||
return -1;
|
||||
}
|
||||
e = pam_authenticate(pamh, 0);
|
||||
switch (e) {
|
||||
|
||||
case PAM_SUCCESS:
|
||||
/*
|
||||
* With PAM we support the concept of a "template"
|
||||
* user. The user enters a login name which is
|
||||
* authenticated by PAM, usually via a remote service
|
||||
* such as RADIUS or TACACS+. If authentication
|
||||
* succeeds, a different but related "template" name
|
||||
* is used for setting the credentials, shell, and
|
||||
* home directory. The name the user enters need only
|
||||
* exist on the remote authentication server, but the
|
||||
* template name must be present in the local password
|
||||
* database.
|
||||
*
|
||||
* This is supported by two various mechanisms in the
|
||||
* individual modules. However, from the application's
|
||||
* point of view, the template user is always passed
|
||||
* back as a changed value of the PAM_USER item.
|
||||
*/
|
||||
if ((e = pam_get_item(pamh, PAM_USER, &item)) ==
|
||||
PAM_SUCCESS) {
|
||||
tmpl_user = (const char *) item;
|
||||
if (strcmp(username, tmpl_user) != 0)
|
||||
pwd = getpwnam(tmpl_user);
|
||||
} else
|
||||
syslog(LOG_ERR, "Couldn't get PAM_USER: %s",
|
||||
pam_strerror(pamh, e));
|
||||
rval = 0;
|
||||
break;
|
||||
|
||||
case PAM_AUTH_ERR:
|
||||
case PAM_USER_UNKNOWN:
|
||||
case PAM_MAXTRIES:
|
||||
rval = 1;
|
||||
break;
|
||||
|
||||
default:
|
||||
syslog(LOG_ERR, "auth_pam: %s", pam_strerror(pamh, e));
|
||||
rval = -1;
|
||||
break;
|
||||
}
|
||||
if ((e = pam_end(pamh, e)) != PAM_SUCCESS) {
|
||||
syslog(LOG_ERR, "pam_end: %s", pam_strerror(pamh, e));
|
||||
rval = -1;
|
||||
}
|
||||
return rval;
|
||||
}
|
||||
|
||||
static void
|
||||
usage()
|
||||
{
|
||||
|
||||
Loading…
Reference in New Issue
Block a user