- implement -a (verfiy all hostnames) with code taken from rshd(8).
closes [misc/543] and [bin/1295] - syslog() failures of iruserok(), which should help debugging why a .rhosts authentication failed. - log a successful iruserok() if -L given. idea from rshd(8). - allow root .rhosts to authenticate, the same way that rshd(8) does. the prior behaviour meant that 'rsh foo csh -i' could get a shell without a password, but 'rlogin foo' couldn't; very inconsistant. closes [bin/1078] and [bin/1239]
This commit is contained in:
lukem
parent
f0873310e2
commit
9e4b2c6012
|
|
@ -30,9 +30,9 @@
|
|||
.\" SUCH DAMAGE.
|
||||
.\"
|
||||
.\" from: @(#)rlogind.8 8.1 (Berkeley) 6/4/93
|
||||
.\" $Id: rlogind.8,v 1.3 1994/06/05 13:49:04 cgd Exp $
|
||||
.\" $Id: rlogind.8,v 1.4 1996/11/08 07:47:44 lukem Exp $
|
||||
.\"
|
||||
.Dd June 4, 1993
|
||||
.Dd November 8, 1996
|
||||
.Dt RLOGIND 8
|
||||
.Os BSD 4.2
|
||||
.Sh NAME
|
||||
|
|
@ -40,7 +40,7 @@
|
|||
.Nd remote login server
|
||||
.Sh SYNOPSIS
|
||||
.Nm rlogind
|
||||
.Op Fl aln
|
||||
.Op Fl alnL
|
||||
.Sh DESCRIPTION
|
||||
.Nm Rlogind
|
||||
is the server for the
|
||||
|
|
@ -59,6 +59,12 @@ Prevent any authentication based on the user's
|
|||
file, unless the user is logging in as the superuser.
|
||||
.It Fl n
|
||||
Disable keep-alive messages.
|
||||
.It Fl L
|
||||
Log all successful accesses to
|
||||
.Xr syslogd 8
|
||||
as
|
||||
.Li auth.info
|
||||
messages.
|
||||
.El
|
||||
.Pp
|
||||
.Nm Rlogind
|
||||
|
|
|
|||
|
|
@ -39,7 +39,7 @@ static char copyright[] =
|
|||
|
||||
#ifndef lint
|
||||
/* from: static char sccsid[] = "@(#)rlogind.c 8.1 (Berkeley) 6/4/93"; */
|
||||
static char *rcsid = "$Id: rlogind.c,v 1.8 1996/05/21 12:22:31 mrg Exp $";
|
||||
static char *rcsid = "$Id: rlogind.c,v 1.9 1996/11/08 07:47:45 lukem Exp $";
|
||||
#endif /* not lint */
|
||||
|
||||
/*
|
||||
|
|
@ -72,6 +72,7 @@ static char *rcsid = "$Id: rlogind.c,v 1.8 1996/05/21 12:22:31 mrg Exp $";
|
|||
#include <unistd.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
#include <util.h>
|
||||
#include <utmp.h>
|
||||
#include "pathnames.h"
|
||||
|
||||
|
|
@ -79,7 +80,7 @@ static char *rcsid = "$Id: rlogind.c,v 1.8 1996/05/21 12:22:31 mrg Exp $";
|
|||
#define TIOCPKT_WINDOW 0x80
|
||||
#endif
|
||||
|
||||
#define ARGSTR "aln"
|
||||
#define OPTIONS "alnL"
|
||||
|
||||
char *env[2];
|
||||
#define NMAX 30
|
||||
|
|
@ -88,6 +89,7 @@ static char term[64] = "TERM=";
|
|||
#define ENVSIZE (sizeof("TERM=")-1) /* skip null for concatenation */
|
||||
int keepalive = 1;
|
||||
int check_all = 0;
|
||||
int log_success = 0;
|
||||
|
||||
struct passwd *pwd;
|
||||
|
||||
|
|
@ -96,7 +98,7 @@ int control __P((int, char *, int));
|
|||
void protocol __P((int, int));
|
||||
void cleanup __P((int));
|
||||
void fatal __P((int, char *, int));
|
||||
int do_rlogin __P((struct sockaddr_in *));
|
||||
int do_rlogin __P((struct sockaddr_in *, char *));
|
||||
void getstr __P((char *, int, char *));
|
||||
void setup_term __P((int));
|
||||
int do_krb_login __P((struct sockaddr_in *));
|
||||
|
|
@ -116,7 +118,7 @@ main(argc, argv)
|
|||
openlog("rlogind", LOG_PID | LOG_CONS, LOG_AUTH);
|
||||
|
||||
opterr = 0;
|
||||
while ((ch = getopt(argc, argv, ARGSTR)) != EOF)
|
||||
while ((ch = getopt(argc, argv, OPTIONS)) != EOF)
|
||||
switch (ch) {
|
||||
case 'a':
|
||||
check_all = 1;
|
||||
|
|
@ -127,6 +129,9 @@ main(argc, argv)
|
|||
case 'n':
|
||||
keepalive = 0;
|
||||
break;
|
||||
case 'L':
|
||||
log_success = 1;
|
||||
break;
|
||||
case '?':
|
||||
default:
|
||||
usage();
|
||||
|
|
@ -148,6 +153,7 @@ main(argc, argv)
|
|||
if (setsockopt(0, IPPROTO_IP, IP_TOS, (char *)&on, sizeof(int)) < 0)
|
||||
syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
|
||||
doit(0, &from);
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
||||
int child;
|
||||
|
|
@ -166,7 +172,9 @@ doit(f, fromp)
|
|||
int master, pid, on = 1;
|
||||
int authenticated = 0;
|
||||
register struct hostent *hp;
|
||||
char hostname[2 * MAXHOSTNAMELEN + 1];
|
||||
char utmphost[UT_HOSTSIZE + 1];
|
||||
char *hostname;
|
||||
char hostnamebuf[2 * MAXHOSTNAMELEN + 1];
|
||||
char c;
|
||||
|
||||
alarm(60);
|
||||
|
|
@ -179,21 +187,65 @@ doit(f, fromp)
|
|||
fromp->sin_port = ntohs((u_short)fromp->sin_port);
|
||||
hp = gethostbyaddr((char *)&fromp->sin_addr, sizeof(struct in_addr),
|
||||
fromp->sin_family);
|
||||
if (hp && (strlen(hp->h_name) <= UT_HOSTSIZE))
|
||||
(void)strcpy(hostname, hp->h_name);
|
||||
else
|
||||
(void)strcpy(hostname, inet_ntoa(fromp->sin_addr));
|
||||
|
||||
{
|
||||
if (fromp->sin_family != AF_INET ||
|
||||
fromp->sin_port >= IPPORT_RESERVED ||
|
||||
fromp->sin_port < IPPORT_RESERVED/2) {
|
||||
syslog(LOG_NOTICE, "Connection from %s on illegal port",
|
||||
inet_ntoa(fromp->sin_addr));
|
||||
fatal(f, "Permission denied", 0);
|
||||
if (hp) {
|
||||
/*
|
||||
* If name returned by gethostbyaddr is in our domain,
|
||||
* attempt to verify that we haven't been fooled by someone
|
||||
* in a remote net; look up the name and check that this
|
||||
* address corresponds to the name.
|
||||
*/
|
||||
hostname = hp->h_name;
|
||||
if (check_all || local_domain(hp->h_name)) {
|
||||
strncpy(hostnamebuf, hp->h_name,
|
||||
sizeof(hostnamebuf) - 1);
|
||||
hostnamebuf[sizeof(hostnamebuf) - 1] = 0;
|
||||
hp = gethostbyname(hostnamebuf);
|
||||
if (hp == NULL) {
|
||||
syslog(LOG_INFO,
|
||||
"Couldn't look up address for %s",
|
||||
hostnamebuf);
|
||||
hostname = inet_ntoa(fromp->sin_addr);
|
||||
} else for (; ; hp->h_addr_list++) {
|
||||
if (hp->h_addr_list[0] == NULL) {
|
||||
syslog(LOG_NOTICE,
|
||||
"Host addr %s not listed for host %s",
|
||||
inet_ntoa(fromp->sin_addr),
|
||||
hp->h_name);
|
||||
hostname = inet_ntoa(fromp->sin_addr);
|
||||
break;
|
||||
}
|
||||
if (!bcmp(hp->h_addr_list[0],
|
||||
(caddr_t)&fromp->sin_addr,
|
||||
sizeof(fromp->sin_addr))) {
|
||||
hostname = hp->h_name;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
hostname = strncpy(hostnamebuf, hostname,
|
||||
sizeof(hostnamebuf) - 1);
|
||||
} else
|
||||
hostname = strncpy(hostnamebuf, inet_ntoa(fromp->sin_addr),
|
||||
sizeof(hostnamebuf) - 1);
|
||||
|
||||
hostnamebuf[sizeof(hostnamebuf) - 1] = '\0';
|
||||
|
||||
if (strlen(hostname) < sizeof(utmphost))
|
||||
(void)strcpy(utmphost, hostname);
|
||||
else
|
||||
(void)strncpy(utmphost, inet_ntoa(fromp->sin_addr),
|
||||
sizeof(utmphost));
|
||||
utmphost[sizeof(utmphost) - 1] = '\0';
|
||||
|
||||
if (fromp->sin_family != AF_INET ||
|
||||
fromp->sin_port >= IPPORT_RESERVED ||
|
||||
fromp->sin_port < IPPORT_RESERVED/2) {
|
||||
syslog(LOG_NOTICE, "Connection from %s on illegal port",
|
||||
inet_ntoa(fromp->sin_addr));
|
||||
fatal(f, "Permission denied", 0);
|
||||
}
|
||||
#ifdef IP_OPTIONS
|
||||
{
|
||||
{
|
||||
u_char optbuf[BUFSIZ/3], *cp;
|
||||
char lbuf[BUFSIZ], *lp;
|
||||
int optsize = sizeof(optbuf), ipproto;
|
||||
|
|
@ -218,11 +270,10 @@ doit(f, fromp)
|
|||
exit(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
#endif
|
||||
if (do_rlogin(fromp) == 0)
|
||||
authenticated++;
|
||||
}
|
||||
#endif
|
||||
if (do_rlogin(fromp, hostname) == 0)
|
||||
authenticated++;
|
||||
if (confirmed == 0) {
|
||||
write(f, "", 1);
|
||||
confirmed = 1; /* we sent the null! */
|
||||
|
|
@ -242,10 +293,10 @@ doit(f, fromp)
|
|||
setup_term(0);
|
||||
if (authenticated)
|
||||
execl(_PATH_LOGIN, "login", "-p",
|
||||
"-h", hostname, "-f", "--", lusername, (char *)0);
|
||||
"-h", utmphost, "-f", "--", lusername, (char *)0);
|
||||
else
|
||||
execl(_PATH_LOGIN, "login", "-p",
|
||||
"-h", hostname, "--", lusername, (char *)0);
|
||||
"-h", utmphost, "--", lusername, (char *)0);
|
||||
fatal(STDERR_FILENO, _PATH_LOGIN, 1);
|
||||
/*NOTREACHED*/
|
||||
}
|
||||
|
|
@ -375,7 +426,8 @@ protocol(f, p)
|
|||
if (n) {
|
||||
left -= n;
|
||||
if (left > 0)
|
||||
bcopy(cp+n, cp, left);
|
||||
bcopy(cp+n, cp,
|
||||
left);
|
||||
fcc -= n;
|
||||
goto top; /* n^2 */
|
||||
}
|
||||
|
|
@ -473,20 +525,39 @@ fatal(f, msg, syserr)
|
|||
}
|
||||
|
||||
int
|
||||
do_rlogin(dest)
|
||||
do_rlogin(dest, host)
|
||||
struct sockaddr_in *dest;
|
||||
char *host;
|
||||
{
|
||||
extern char *__rcmd_errstr; /* syslog hook from libc/net/rcmd.c */
|
||||
int retval;
|
||||
|
||||
getstr(rusername, sizeof(rusername), "remuser too long");
|
||||
getstr(lusername, sizeof(lusername), "locuser too long");
|
||||
getstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type too long");
|
||||
|
||||
pwd = getpwnam(lusername);
|
||||
if (pwd == NULL)
|
||||
if (pwd == NULL) {
|
||||
syslog(LOG_INFO,
|
||||
"%s@%s as %s: unknown login.", rusername, host, lusername);
|
||||
return (-1);
|
||||
if (pwd->pw_uid == 0)
|
||||
return (-1);
|
||||
/* XXX why don't we syslog() failure? */
|
||||
return (iruserok(dest->sin_addr.s_addr, 0, rusername, lusername));
|
||||
}
|
||||
retval = iruserok(dest->sin_addr.s_addr, pwd->pw_uid == 0, rusername,
|
||||
lusername);
|
||||
/* XXX put inet_ntoa(dest->sin_addr.s_addr) into all messages below */
|
||||
if (retval == 0) {
|
||||
if (log_success)
|
||||
syslog(LOG_INFO, "%s@%s as %s: iruserok succeeded",
|
||||
rusername, host, lusername);
|
||||
} else {
|
||||
if (__rcmd_errstr)
|
||||
syslog(LOG_INFO, "%s@%s as %s: iruserok failed (%s)",
|
||||
rusername, host, lusername, __rcmd_errstr);
|
||||
else
|
||||
syslog(LOG_INFO, "%s@%s as %s: iruserok failed",
|
||||
rusername, host, lusername);
|
||||
}
|
||||
return(retval);
|
||||
}
|
||||
|
||||
void
|
||||
|
|
@ -553,7 +624,7 @@ setup_term(fd)
|
|||
void
|
||||
usage()
|
||||
{
|
||||
syslog(LOG_ERR, "usage: rlogind [-aln]");
|
||||
syslog(LOG_ERR, "usage: rlogind [-alnL]");
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
|
|||
Loading…
Reference in New Issue