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Diffstat (limited to 'newlib/libc/sys/linux/net/rcmd.c')
-rw-r--r--newlib/libc/sys/linux/net/rcmd.c1190
1 files changed, 542 insertions, 648 deletions
diff --git a/newlib/libc/sys/linux/net/rcmd.c b/newlib/libc/sys/linux/net/rcmd.c
index ab3ade89b..708b69d1b 100644
--- a/newlib/libc/sys/linux/net/rcmd.c
+++ b/newlib/libc/sys/linux/net/rcmd.c
@@ -1,32 +1,4 @@
/*
- * Copyright (C) 1998 WIDE Project.
- * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
- */
-/*
* Copyright (c) 1983, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
@@ -38,6 +10,10 @@
* 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.
@@ -58,51 +34,55 @@
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)rcmd.c 8.3 (Berkeley) 3/26/94";
#endif /* LIBC_SCCS and not lint */
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <time.h>
+#include <sys/select.h>
+#include "namespace.h"
#include <sys/param.h>
-#include <sys/poll.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <netinet/in.h>
#include <arpa/inet.h>
-#include <alloca.h>
#include <signal.h>
#include <fcntl.h>
#include <netdb.h>
+#include <stdlib.h>
#include <unistd.h>
#include <pwd.h>
#include <errno.h>
#include <stdio.h>
-#include <stdio_ext.h>
#include <ctype.h>
#include <string.h>
-#include <libintl.h>
-#include <stdlib.h>
-#include <wchar.h>
-#include <sys/uio.h>
+#ifdef YP
+#include <rpc/rpc.h>
+#include <rpcsvc/yp_prot.h>
+#include <rpcsvc/ypclnt.h>
+#endif
+#include <arpa/nameser.h>
+#include "un-namespace.h"
-#include "local.h"
+/* wrapper for KAME-special getnameinfo() */
+#ifndef NI_WITHSCOPEID
+#define NI_WITHSCOPEID 0
+#endif
+extern int innetgr( const char *, const char *, const char *, const char * );
+extern int rcmdsh(char **ahost, int rport, const char *locuser, const char *remuser, const char *cmd, const char *rshprog);
+int rresvport_af(int *alport, int family);
-int __ivaliduser (FILE *, u_int32_t, const char *, const char *);
-static int __validuser2_sa (FILE *, struct sockaddr *, size_t,
- const char *, const char *, const char *);
-static int ruserok2_sa (struct sockaddr *ra, size_t ralen,
- int superuser, const char *ruser,
- const char *luser, const char *rhost);
-static int ruserok_sa (struct sockaddr *ra, size_t ralen,
- int superuser, const char *ruser,
- const char *luser);
-int iruserok_af (const void *raddr, int superuser, const char *ruser,
- const char *luser, sa_family_t af);
-int iruserok (u_int32_t raddr, int superuser, const char *ruser,
- const char *luser);
+#define max(a, b) ((a > b) ? a : b)
-libc_hidden_proto (iruserok_af)
+int __ivaliduser(FILE *, u_int32_t, const char *, const char *);
+int __ivaliduser_af(FILE *,const void *, const char *, const char *, int, int);
+int __ivaliduser_sa(FILE *, const struct sockaddr *, socklen_t, const char *,
+ const char *);
+static int __icheckhost(const struct sockaddr *, socklen_t, const char *);
-libc_freeres_ptr(static char *ahostbuf);
+char paddr[NI_MAXHOST];
int
rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, af)
@@ -110,300 +90,242 @@ rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, af)
u_short rport;
const char *locuser, *remuser, *cmd;
int *fd2p;
- sa_family_t af;
+ int af;
{
- char paddr[INET6_ADDRSTRLEN];
struct addrinfo hints, *res, *ai;
struct sockaddr_storage from;
- struct pollfd pfd[2];
- int32_t oldmask;
+ fd_set reads;
+ sigset_t oldmask, newmask;
pid_t pid;
- int s, lport, timo, error;
- char c;
- int refused;
+ int s, aport, lport, timo, error;
+ char c, *p;
+ int refused, nres;
char num[8];
- ssize_t n;
+ static char canonnamebuf[MAXDNAME]; /* is it proper here? */
- if (af != AF_INET && af != AF_INET6 && af != AF_UNSPEC)
- {
- __set_errno (EAFNOSUPPORT);
- return -1;
- }
+ /* call rcmdsh() with specified remote shell if appropriate. */
+ if (!issetugid() && (p = getenv("RSH"))) {
+ struct servent *sp = getservbyname("shell", "tcp");
- pid = __getpid();
+ if (sp && sp->s_port == rport)
+ return (rcmdsh(ahost, rport, locuser, remuser,
+ cmd, p));
+ }
+
+ /* use rsh(1) if non-root and remote port is shell. */
+ if (geteuid()) {
+ struct servent *sp = getservbyname("shell", "tcp");
+
+ if (sp && sp->s_port == rport)
+ return (rcmdsh(ahost, rport, locuser, remuser,
+ cmd, NULL));
+ }
- memset(&hints, '\0', sizeof(hints));
+ pid = getpid();
+
+ memset(&hints, 0, sizeof(hints));
hints.ai_flags = AI_CANONNAME;
hints.ai_family = af;
hints.ai_socktype = SOCK_STREAM;
+ hints.ai_protocol = 0;
(void)snprintf(num, sizeof(num), "%d", ntohs(rport));
error = getaddrinfo(*ahost, num, &hints, &res);
if (error) {
- if (error == EAI_NONAME && *ahost != NULL) {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf(stderr, L"%s: Unknown host\n",
- *ahost);
- else
- fprintf(stderr, "%s: Unknown host\n", *ahost);
- } else {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf(stderr, L"rcmd: getaddrinfo: %s\n",
- gai_strerror(error));
- else
- fprintf(stderr, "rcmd: getaddrinfo: %s\n",
- gai_strerror(error));
- }
- return (-1);
+ fprintf(stderr, "rcmd: getaddrinfo: %s\n",
+ gai_strerror(error));
+ if (error == EAI_SYSTEM)
+ fprintf(stderr, "rcmd: getaddrinfo: %s\n",
+ strerror(errno));
+ return (-1);
}
- pfd[0].events = POLLIN;
- pfd[1].events = POLLIN;
-
- if (res->ai_canonname){
- free (ahostbuf);
- ahostbuf = strdup (res->ai_canonname);
- if (ahostbuf == NULL) {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf(stderr, L"%s",
- _("rcmd: Cannot allocate memory\n"));
- else
- fputs(_("rcmd: Cannot allocate memory\n"),
- stderr);
- return (-1);
- }
- *ahost = ahostbuf;
- } else
- *ahost = NULL;
+ if (res->ai_canonname
+ && strlen(res->ai_canonname) + 1 < sizeof(canonnamebuf)) {
+ strncpy(canonnamebuf, res->ai_canonname, sizeof(canonnamebuf));
+ *ahost = canonnamebuf;
+ }
+ nres = 0;
+ for (ai = res; ai; ai = ai->ai_next)
+ nres++;
ai = res;
refused = 0;
- oldmask = __sigblock(sigmask(SIGURG));
+ sigemptyset(&newmask);
+ sigaddset(&newmask, SIGURG);
+ sigprocmask(SIG_BLOCK, (const sigset_t *)&newmask, &oldmask);
for (timo = 1, lport = IPPORT_RESERVED - 1;;) {
- char errbuf[200];
-
s = rresvport_af(&lport, ai->ai_family);
if (s < 0) {
- if (errno == EAGAIN) {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf(stderr, L"%s",
- _("rcmd: socket: All ports in use\n"));
- else
- fputs(_("rcmd: socket: All ports in use\n"),
- stderr);
- } else {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf(stderr,
- L"rcmd: socket: %m\n");
- else
- fprintf(stderr, "rcmd: socket: %m\n");
+ if (errno != EAGAIN && ai->ai_next) {
+ ai = ai->ai_next;
+ continue;
}
- __sigsetmask(oldmask);
+ if (errno == EAGAIN)
+ (void)fprintf(stderr,
+ "rcmd: socket: All ports in use\n");
+ else
+ (void)fprintf(stderr, "rcmd: socket: %s\n",
+ strerror(errno));
freeaddrinfo(res);
- return -1;
+ sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
+ NULL);
+ return (-1);
}
- __fcntl(s, F_SETOWN, pid);
- if (__connect(s, ai->ai_addr, ai->ai_addrlen) >= 0)
+ fcntl(s, F_SETOWN, pid);
+ if (connect(s, ai->ai_addr, ai->ai_addrlen) >= 0)
break;
- (void)__close(s);
+ (void)close(s);
if (errno == EADDRINUSE) {
lport--;
continue;
}
if (errno == ECONNREFUSED)
refused = 1;
- if (ai->ai_next != NULL) {
+ if (ai->ai_next == NULL && (!refused || timo > 16)) {
+ (void)fprintf(stderr, "%s: %s\n",
+ *ahost, strerror(errno));
+ freeaddrinfo(res);
+ sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask,
+ NULL);
+ return (-1);
+ }
+ if (nres > 1) {
int oerrno = errno;
- char *buf = NULL;
getnameinfo(ai->ai_addr, ai->ai_addrlen,
paddr, sizeof(paddr),
NULL, 0,
- NI_NUMERICHOST);
-
- if (__asprintf (&buf, _("connect to address %s: "),
- paddr) >= 0)
- {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf(stderr, L"%s", buf);
- else
- fputs (buf, stderr);
- free (buf);
- }
- __set_errno (oerrno);
+ NI_NUMERICHOST|NI_WITHSCOPEID);
+ (void)fprintf(stderr, "connect to address %s: ",
+ paddr);
+ errno = oerrno;
perror(0);
- ai = ai->ai_next;
- getnameinfo(ai->ai_addr, ai->ai_addrlen,
- paddr, sizeof(paddr),
- NULL, 0,
- NI_NUMERICHOST);
- if (__asprintf (&buf, _("Trying %s...\n"), paddr) >= 0)
- {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s", buf);
- else
- fputs (buf, stderr);
- free (buf);
- }
- continue;
}
- if (refused && timo <= 16) {
- (void)sleep(timo);
+ if ((ai = ai->ai_next) == NULL) {
+ /* refused && timo <= 16 */
+ struct timespec time_to_sleep, time_remaining;
+
+ time_to_sleep.tv_sec = timo;
+ time_to_sleep.tv_nsec = 0;
+ (void)nanosleep(&time_to_sleep, &time_remaining);
timo *= 2;
ai = res;
refused = 0;
- continue;
}
- freeaddrinfo(res);
- if (_IO_fwide (stderr, 0) > 0)
- (void)__fwprintf(stderr, L"%s: %s\n", *ahost,
- strerror_r(errno,
- errbuf, sizeof (errbuf)));
- else
- (void)fprintf(stderr, "%s: %s\n", *ahost,
- strerror_r(errno,
- errbuf, sizeof (errbuf)));
- __sigsetmask(oldmask);
- return -1;
+ if (nres > 1) {
+ getnameinfo(ai->ai_addr, ai->ai_addrlen,
+ paddr, sizeof(paddr),
+ NULL, 0,
+ NI_NUMERICHOST|NI_WITHSCOPEID);
+ fprintf(stderr, "Trying %s...\n", paddr);
+ }
}
lport--;
if (fd2p == 0) {
- __write(s, "", 1);
+ write(s, "", 1);
lport = 0;
} else {
char num[8];
int s2 = rresvport_af(&lport, ai->ai_family), s3;
- socklen_t len = ai->ai_addrlen;
+ int len = ai->ai_addrlen;
+ int nfds;
if (s2 < 0)
goto bad;
listen(s2, 1);
(void)snprintf(num, sizeof(num), "%d", lport);
- if (__write(s, num, strlen(num)+1) != (ssize_t)strlen(num)+1) {
- char *buf = NULL;
-
- if (__asprintf (&buf, _("\
-rcmd: write (setting up stderr): %m\n")) >= 0)
- {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf(stderr, L"%s", buf);
- else
- fputs (buf, stderr);
- free (buf);
- }
- (void)__close(s2);
+ if (write(s, num, strlen(num)+1) != strlen(num)+1) {
+ (void)fprintf(stderr,
+ "rcmd: write (setting up stderr): %s\n",
+ strerror(errno));
+ (void)close(s2);
goto bad;
}
- pfd[0].fd = s;
- pfd[1].fd = s2;
- __set_errno (0);
- if (__poll (pfd, 2, -1) < 1 || (pfd[1].revents & POLLIN) == 0){
- char *buf = NULL;
-
- if ((errno != 0
- && __asprintf(&buf, _("\
-rcmd: poll (setting up stderr): %m\n")) >= 0)
- || (errno == 0
- && __asprintf(&buf, _("\
-poll: protocol failure in circuit setup\n")) >= 0))
- {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s", buf);
- else
- fputs (buf, stderr);
- free (buf);
- }
- (void)__close(s2);
+ nfds = max(s, s2)+1;
+ if(nfds > FD_SETSIZE) {
+ fprintf(stderr, "rcmd: too many files\n");
+ (void)close(s2);
goto bad;
}
- s3 = TEMP_FAILURE_RETRY (accept(s2, (struct sockaddr *)&from,
- &len));
+again:
+ FD_ZERO(&reads);
+ FD_SET(s, &reads);
+ FD_SET(s2, &reads);
+ errno = 0;
+ if (select(nfds, &reads, 0, 0, 0) < 1 || !FD_ISSET(s2, &reads)){
+ if (errno != 0)
+ (void)fprintf(stderr,
+ "rcmd: select (setting up stderr): %s\n",
+ strerror(errno));
+ else
+ (void)fprintf(stderr,
+ "select: protocol failure in circuit setup\n");
+ (void)close(s2);
+ goto bad;
+ }
+ s3 = accept(s2, (struct sockaddr *)&from, &len);
switch (from.ss_family) {
case AF_INET:
- rport = ntohs(((struct sockaddr_in *)&from)->sin_port);
+ aport = ntohs(((struct sockaddr_in *)&from)->sin_port);
break;
+#ifdef INET6
case AF_INET6:
- rport = ntohs(((struct sockaddr_in6 *)&from)->sin6_port);
+ aport = ntohs(((struct sockaddr_in6 *)&from)->sin6_port);
break;
+#endif
default:
- rport = 0;
+ aport = 0; /* error */
break;
}
- (void)__close(s2);
+ /*
+ * XXX careful for ftp bounce attacks. If discovered, shut them
+ * down and check for the real auxiliary channel to connect.
+ */
+ if (aport == 20) {
+ close(s3);
+ goto again;
+ }
+ (void)close(s2);
if (s3 < 0) {
- if (_IO_fwide (stderr, 0) > 0)
- (void)__fwprintf(stderr,
- L"rcmd: accept: %m\n");
- else
- (void)fprintf(stderr,
- "rcmd: accept: %m\n");
+ (void)fprintf(stderr,
+ "rcmd: accept: %s\n", strerror(errno));
lport = 0;
goto bad;
}
*fd2p = s3;
-
- if (rport >= IPPORT_RESERVED || rport < IPPORT_RESERVED / 2){
- char *buf = NULL;
-
- if (__asprintf(&buf, _("\
-socket: protocol failure in circuit setup\n")) >= 0)
- {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s", buf);
- else
- fputs (buf, stderr);
- free (buf);
- }
+ if (aport >= IPPORT_RESERVED || aport < IPPORT_RESERVED / 2) {
+ (void)fprintf(stderr,
+ "socket: protocol failure in circuit setup.\n");
goto bad2;
}
}
- struct iovec iov[3] =
- {
- [0] = { .iov_base = (void *) locuser,
- .iov_len = strlen (locuser) + 1 },
- [1] = { .iov_base = (void *) remuser,
- .iov_len = strlen (remuser) + 1 },
- [2] = { .iov_base = (void *) cmd,
- .iov_len = strlen (cmd) + 1 }
- };
- (void) TEMP_FAILURE_RETRY (writev (s, iov, 3));
- n = TEMP_FAILURE_RETRY (read(s, &c, 1));
- if (n != 1) {
- char *buf = NULL;
-
- if ((n == 0
- && asprintf(&buf, _("rcmd: %s: short read"),
- *ahost) >= 0)
- || (n != 0
- && asprintf(&buf, "rcmd: %s: %m\n", *ahost) >= 0))
- {
- if (_IO_fwide (stderr, 0) > 0)
- __fwprintf (stderr, L"%s", buf);
- else
- fputs (buf, stderr);
- free (buf);
- }
+ (void)write(s, locuser, strlen(locuser)+1);
+ (void)write(s, remuser, strlen(remuser)+1);
+ (void)write(s, cmd, strlen(cmd)+1);
+ if (read(s, &c, 1) != 1) {
+ (void)fprintf(stderr,
+ "rcmd: %s: %s\n", *ahost, strerror(errno));
goto bad2;
}
if (c != 0) {
- while (__read(s, &c, 1) == 1) {
- (void)__write(STDERR_FILENO, &c, 1);
+ while (read(s, &c, 1) == 1) {
+ (void)write(STDERR_FILENO, &c, 1);
if (c == '\n')
break;
}
goto bad2;
}
- __sigsetmask(oldmask);
+ sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
freeaddrinfo(res);
- return s;
+ return (s);
bad2:
if (lport)
- (void)__close(*fd2p);
+ (void)close(*fd2p);
bad:
- (void)__close(s);
- __sigsetmask(oldmask);
+ (void)close(s);
+ sigprocmask(SIG_SETMASK, (const sigset_t *)&oldmask, NULL);
freeaddrinfo(res);
- return -1;
+ return (-1);
}
-libc_hidden_def (rcmd_af)
int
rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
@@ -412,155 +334,90 @@ rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
const char *locuser, *remuser, *cmd;
int *fd2p;
{
- return rcmd_af (ahost, rport, locuser, remuser, cmd, fd2p, AF_INET);
+ return rcmd_af(ahost, rport, locuser, remuser, cmd, fd2p, AF_INET);
+}
+
+int
+rresvport(port)
+ int *port;
+{
+ return rresvport_af(port, AF_INET);
}
int
rresvport_af(alport, family)
- int *alport;
- sa_family_t family;
+ int *alport, family;
{
- struct sockaddr_storage ss;
int s;
- size_t len;
- uint16_t *sport;
+ struct sockaddr_storage ss;
+ u_short *sport;
- switch(family){
+ memset(&ss, 0, sizeof(ss));
+ ss.ss_family = family;
+ switch (family) {
case AF_INET:
- len = sizeof(struct sockaddr_in);
sport = &((struct sockaddr_in *)&ss)->sin_port;
+ ((struct sockaddr_in *)&ss)->sin_addr.s_addr = INADDR_ANY;
break;
+#ifdef INET6
case AF_INET6:
- len = sizeof(struct sockaddr_in6);
sport = &((struct sockaddr_in6 *)&ss)->sin6_port;
+ ((struct sockaddr_in6 *)&ss)->sin6_addr = in6addr_any;
break;
+#endif
default:
- __set_errno (EAFNOSUPPORT);
+ errno = EAFNOSUPPORT;
return -1;
}
- s = __socket(family, SOCK_STREAM, 0);
- if (s < 0)
- return -1;
- memset (&ss, '\0', sizeof(ss));
-#ifdef SALEN
- ss.__ss_len = len;
+ s = socket(ss.ss_family, SOCK_STREAM, 0);
+ if (s < 0)
+ return (-1);
+#if 0 /* compat_exact_traditional_rresvport_semantics */
+ sin.sin_port = htons((u_short)*alport);
+ if (_bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0)
+ return (s);
+ if (errno != EADDRINUSE) {
+ (void)close(s);
+ return (-1);
+ }
#endif
- ss.ss_family = family;
-
- /* Ignore invalid values. */
- if (*alport < IPPORT_RESERVED / 2)
- *alport = IPPORT_RESERVED / 2;
- else if (*alport >= IPPORT_RESERVED)
- *alport = IPPORT_RESERVED - 1;
-
- int start = *alport;
- do {
- *sport = htons((uint16_t) *alport);
- if (__bind(s, (struct sockaddr *)&ss, len) >= 0)
- return s;
- if (errno != EADDRINUSE) {
- (void)__close(s);
- return -1;
- }
- if ((*alport)-- == IPPORT_RESERVED/2)
- *alport = IPPORT_RESERVED - 1;
- } while (*alport != start);
- (void)__close(s);
- __set_errno (EAGAIN);
- return -1;
-}
-libc_hidden_def (rresvport_af)
-
-int
-rresvport(alport)
- int *alport;
-{
- return rresvport_af(alport, AF_INET);
+ *sport = 0;
+ if (bindresvport_sa(s, (struct sockaddr *)&ss) == -1) {
+ (void)close(s);
+ return (-1);
+ }
+ *alport = (int)ntohs(*sport);
+ return (s);
}
int __check_rhosts_file = 1;
char *__rcmd_errstr;
int
-ruserok_af(rhost, superuser, ruser, luser, af)
- const char *rhost, *ruser, *luser;
- int superuser;
- sa_family_t af;
-{
- struct addrinfo hints, *res, *res0;
- int gai;
- int ret;
-
- memset (&hints, '\0', sizeof(hints));
- hints.ai_family = af;
- gai = getaddrinfo(rhost, NULL, &hints, &res0);
- if (gai)
- return -1;
- ret = -1;
- for (res=res0; res; res=res->ai_next)
- if (ruserok2_sa(res->ai_addr, res->ai_addrlen,
- superuser, ruser, luser, rhost) == 0){
- ret = 0;
- break;
- }
- freeaddrinfo(res0);
- return (ret);
-}
-libc_hidden_def (ruserok_af)
-
-int
ruserok(rhost, superuser, ruser, luser)
const char *rhost, *ruser, *luser;
int superuser;
{
- return ruserok_af(rhost, superuser, ruser, luser, AF_INET);
-}
-
-/* Extremely paranoid file open function. */
-static FILE *
-iruserfopen (const char *file, uid_t okuser)
-{
- struct stat64 st;
- char *cp = NULL;
- FILE *res = NULL;
-
- /* If not a regular file, if owned by someone other than user or
- root, if writeable by anyone but the owner, or if hardlinked
- anywhere, quit. */
- cp = NULL;
- if (__lxstat64 (_STAT_VER, file, &st))
- cp = _("lstat failed");
- else if (!S_ISREG (st.st_mode))
- cp = _("not regular file");
- else
- {
- res = fopen (file, "rc");
- if (!res)
- cp = _("cannot open");
- else if (__fxstat64 (_STAT_VER, fileno (res), &st) < 0)
- cp = _("fstat failed");
- else if (st.st_uid && st.st_uid != okuser)
- cp = _("bad owner");
- else if (st.st_mode & (S_IWGRP|S_IWOTH))
- cp = _("writeable by other than owner");
- else if (st.st_nlink > 1)
- cp = _("hard linked somewhere");
- }
-
- /* If there were any problems, quit. */
- if (cp != NULL)
- {
- __rcmd_errstr = cp;
- if (res)
- fclose (res);
- return NULL;
- }
-
- /* No threads use this stream. */
- __fsetlocking (res, FSETLOCKING_BYCALLER);
-
- return res;
+ struct addrinfo hints, *res, *r;
+ int error;
+
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = PF_UNSPEC;
+ hints.ai_socktype = SOCK_DGRAM; /*dummy*/
+ error = getaddrinfo(rhost, "0", &hints, &res);
+ if (error)
+ return (-1);
+
+ for (r = res; r; r = r->ai_next) {
+ if (iruserok_sa(r->ai_addr, r->ai_addrlen, superuser, ruser,
+ luser) == 0) {
+ freeaddrinfo(res);
+ return (0);
+ }
+ }
+ freeaddrinfo(res);
+ return (-1);
}
/*
@@ -572,127 +429,110 @@ iruserfopen (const char *file, uid_t okuser)
*
* Returns 0 if ok, -1 if not ok.
*/
-static int
-ruserok2_sa (ra, ralen, superuser, ruser, luser, rhost)
- struct sockaddr *ra;
- size_t ralen;
- int superuser;
- const char *ruser, *luser, *rhost;
+int
+iruserok(raddr, superuser, ruser, luser)
+ unsigned long raddr;
+ int superuser;
+ const char *ruser, *luser;
{
- FILE *hostf = NULL;
- int isbad = -1;
-
- if (!superuser)
- hostf = iruserfopen (_PATH_HEQUIV, 0);
-
- if (hostf)
- {
- isbad = __validuser2_sa (hostf, ra, ralen, luser, ruser, rhost);
- fclose (hostf);
-
- if (!isbad)
- return 0;
- }
-
- if (__check_rhosts_file || superuser)
- {
- char *pbuf;
- struct passwd pwdbuf, *pwd;
- size_t dirlen;
- size_t buflen = __sysconf (_SC_GETPW_R_SIZE_MAX);
- char *buffer = __alloca (buflen);
- uid_t uid;
-
- if (__getpwnam_r (luser, &pwdbuf, buffer, buflen, &pwd) != 0
- || pwd == NULL)
- return -1;
-
- dirlen = strlen (pwd->pw_dir);
- pbuf = alloca (dirlen + sizeof "/.rhosts");
- __mempcpy (__mempcpy (pbuf, pwd->pw_dir, dirlen),
- "/.rhosts", sizeof "/.rhosts");
-
- /* Change effective uid while reading .rhosts. If root and
- reading an NFS mounted file system, can't read files that
- are protected read/write owner only. */
- uid = __geteuid ();
- seteuid (pwd->pw_uid);
- hostf = iruserfopen (pbuf, pwd->pw_uid);
-
- if (hostf != NULL)
- {
- isbad = __validuser2_sa (hostf, ra, ralen, luser, ruser, rhost);
- fclose (hostf);
- }
-
- seteuid (uid);
- return isbad;
- }
- return -1;
+ struct sockaddr_in sin;
+ int sin_len;
+
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin_len = sizeof(struct sockaddr_in);
+ memcpy(&sin.sin_addr, &raddr, sizeof(sin.sin_addr));
+ return iruserok_sa((struct sockaddr *)&sin, sin_len, superuser,
+ ruser, luser);
}
+
/*
- * ruserok_sa() is now discussed on ipng, so
- * currently disabled for external use
+ * AF independent extension of iruserok.
+ *
+ * Returns 0 if ok, -1 if not ok.
*/
-static int ruserok_sa(ra, ralen, superuser, ruser, luser)
- struct sockaddr *ra;
- size_t ralen;
- int superuser;
- const char *ruser, *luser;
-{
- return ruserok2_sa(ra, ralen, superuser, ruser, luser, "-");
-}
-
-/* This is the exported version. */
int
-iruserok_af (raddr, superuser, ruser, luser, af)
- const void *raddr;
- int superuser;
- const char *ruser, *luser;
- sa_family_t af;
+iruserok_sa(ra, rlen, superuser, ruser, luser)
+ const void *ra;
+ int rlen;
+ int superuser;
+ const char *ruser, *luser;
{
- struct sockaddr_storage ra;
- size_t ralen;
-
- memset (&ra, '\0', sizeof(ra));
- switch (af){
- case AF_INET:
- ((struct sockaddr_in *)&ra)->sin_family = AF_INET;
- memcpy (&(((struct sockaddr_in *)&ra)->sin_addr), raddr,
- sizeof(struct in_addr));
- ralen = sizeof(struct sockaddr_in);
- break;
- case AF_INET6:
- ((struct sockaddr_in6 *)&ra)->sin6_family = AF_INET6;
- memcpy (&(((struct sockaddr_in6 *)&ra)->sin6_addr), raddr,
- sizeof(struct in6_addr));
- ralen = sizeof(struct sockaddr_in6);
- break;
- default:
- return 0;
- }
- return ruserok_sa ((struct sockaddr *)&ra, ralen, superuser, ruser, luser);
-}
-libc_hidden_def (iruserok_af)
+ char *cp;
+ struct stat sbuf;
+ struct passwd *pwd;
+ FILE *hostf;
+ uid_t uid;
+ int first;
+ char pbuf[MAXPATHLEN];
+ const struct sockaddr *raddr;
+ struct sockaddr_storage ss;
-int
-iruserok (raddr, superuser, ruser, luser)
- u_int32_t raddr;
- int superuser;
- const char *ruser, *luser;
-{
- return iruserok_af (&raddr, superuser, ruser, luser, AF_INET);
+ /* avoid alignment issue */
+ if (rlen > sizeof(ss))
+ return(-1);
+ memcpy(&ss, ra, rlen);
+ raddr = (struct sockaddr *)&ss;
+
+ first = 1;
+ hostf = superuser ? NULL : fopen(_PATH_HEQUIV, "r");
+again:
+ if (hostf) {
+ if (__ivaliduser_sa(hostf, raddr, rlen, luser, ruser) == 0) {
+ (void)fclose(hostf);
+ return (0);
+ }
+ (void)fclose(hostf);
+ }
+ if (first == 1 && (__check_rhosts_file || superuser)) {
+ first = 0;
+ if ((pwd = getpwnam(luser)) == NULL)
+ return (-1);
+ (void)strcpy(pbuf, pwd->pw_dir);
+ (void)strcat(pbuf, "/.rhosts");
+
+ /*
+ * Change effective uid while opening .rhosts. If root and
+ * reading an NFS mounted file system, can't read files that
+ * are protected read/write owner only.
+ */
+ uid = geteuid();
+ (void)seteuid(pwd->pw_uid);
+ hostf = fopen(pbuf, "r");
+ (void)seteuid(uid);
+
+ if (hostf == NULL)
+ return (-1);
+ /*
+ * If not a regular file, or is owned by someone other than
+ * user or root or if writeable by anyone but the owner, quit.
+ */
+ cp = NULL;
+ if (lstat(pbuf, &sbuf) < 0)
+ cp = ".rhosts lstat failed";
+ else if (!S_ISREG(sbuf.st_mode))
+ cp = ".rhosts not regular file";
+ else if (fstat(fileno(hostf), &sbuf) < 0)
+ cp = ".rhosts fstat failed";
+ else if (sbuf.st_uid && sbuf.st_uid != pwd->pw_uid)
+ cp = "bad .rhosts owner";
+ else if (sbuf.st_mode & (S_IWGRP|S_IWOTH))
+ cp = ".rhosts writeable by other than owner";
+ /* If there were any problems, quit. */
+ if (cp) {
+ __rcmd_errstr = cp;
+ (void)fclose(hostf);
+ return (-1);
+ }
+ goto again;
+ }
+ return (-1);
}
/*
* XXX
* Don't make static, used by lpd(8).
*
- * This function is not used anymore. It is only present because lpd(8)
- * calls it (!?!). We simply call __invaliduser2() with an illegal rhost
- * argument. This means that netgroups won't work in .rhost/hosts.equiv
- * files. If you want lpd to work with netgroups, fix lpd to use ruserok()
- * or PAM.
* Returns 0 if ok, -1 if not ok.
*/
int
@@ -701,185 +541,239 @@ __ivaliduser(hostf, raddr, luser, ruser)
u_int32_t raddr;
const char *luser, *ruser;
{
- struct sockaddr_in ra;
- memset(&ra, '\0', sizeof(ra));
- ra.sin_family = AF_INET;
- ra.sin_addr.s_addr = raddr;
- return __validuser2_sa(hostf, (struct sockaddr *)&ra, sizeof(ra),
- luser, ruser, "-");
+ struct sockaddr_in sin;
+ int sin_len;
+
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ sin_len = sizeof(struct sockaddr_in);
+ memcpy(&sin.sin_addr, &raddr, sizeof(sin.sin_addr));
+ return __ivaliduser_sa(hostf, (struct sockaddr *)&sin, sin_len,
+ luser, ruser);
}
-
-/* Returns 1 on positive match, 0 on no match, -1 on negative match. */
-static int
-internal_function
-__checkhost_sa (struct sockaddr *ra, size_t ralen, char *lhost,
- const char *rhost)
+/*
+ * Returns 0 if ok, -1 if not ok.
+ *
+ * XXX obsolete API.
+ */
+int
+__ivaliduser_af(hostf, raddr, luser, ruser, af, len)
+ FILE *hostf;
+ const void *raddr;
+ const char *luser, *ruser;
+ int af, len;
{
- struct addrinfo hints, *res0, *res;
- char raddr[INET6_ADDRSTRLEN];
- int match;
- int negate=1; /* Multiply return with this to get -1 instead of 1 */
-
- /* Check nis netgroup. */
- if (strncmp ("+@", lhost, 2) == 0)
- return innetgr (&lhost[2], rhost, NULL, NULL);
-
- if (strncmp ("-@", lhost, 2) == 0)
- return -innetgr (&lhost[2], rhost, NULL, NULL);
-
- /* -host */
- if (strncmp ("-", lhost,1) == 0) {
- negate = -1;
- lhost++;
- } else if (strcmp ("+",lhost) == 0) {
- return 1; /* asking for trouble, but ok.. */
- }
+ struct sockaddr *sa = NULL;
+ struct sockaddr_in *sin = NULL;
+#ifdef INET6
+ struct sockaddr_in6 *sin6 = NULL;
+#endif
+ struct sockaddr_storage ss;
- /* Try for raw ip address first. */
- /* XXX */
- if (getnameinfo(ra, ralen,
- raddr, sizeof(raddr), NULL, 0,
- NI_NUMERICHOST) == 0
- && strcmp(raddr, lhost) == 0)
- return negate;
-
- /* Better be a hostname. */
- match = 0;
- memset(&hints, '\0', sizeof(hints));
- hints.ai_family = ra->sa_family;
- if (getaddrinfo(lhost, NULL, &hints, &res0) == 0){
- /* Spin through ip addresses. */
- for (res = res0; res; res = res->ai_next)
- {
- if (res->ai_family == ra->sa_family
- && !memcmp(res->ai_addr, ra, res->ai_addrlen))
- {
- match = 1;
- break;
- }
- }
- freeaddrinfo (res0);
+ memset(&ss, 0, sizeof(ss));
+ switch (af) {
+ case AF_INET:
+ if (len != sizeof(sin->sin_addr))
+ return -1;
+ sin = (struct sockaddr_in *)&ss;
+ sin->sin_family = AF_INET;
+ memcpy(&sin->sin_addr, raddr, sizeof(sin->sin_addr));
+ break;
+#ifdef INET6
+ case AF_INET6:
+ if (len != sizeof(sin6->sin6_addr))
+ return -1;
+ /* you will lose scope info */
+ sin6 = (struct sockaddr_in6 *)&ss;
+ sin6->sin6_family = AF_INET6;
+ memcpy(&sin6->sin6_addr, raddr, sizeof(sin6->sin6_addr));
+ break;
+#endif
+ default:
+ return -1;
}
- return negate * match;
-}
-
-/* Returns 1 on positive match, 0 on no match, -1 on negative match. */
-static int
-internal_function
-__icheckuser (const char *luser, const char *ruser)
-{
- /*
- luser is user entry from .rhosts/hosts.equiv file
- ruser is user id on remote host
- */
-
- /* [-+]@netgroup */
- if (strncmp ("+@", luser, 2) == 0)
- return innetgr (&luser[2], NULL, ruser, NULL);
-
- if (strncmp ("-@", luser,2) == 0)
- return -innetgr (&luser[2], NULL, ruser, NULL);
- /* -user */
- if (strncmp ("-", luser, 1) == 0)
- return -(strcmp (&luser[1], ruser) == 0);
-
- /* + */
- if (strcmp ("+", luser) == 0)
- return 1;
-
- /* simple string match */
- return strcmp (ruser, luser) == 0;
+ sa = (struct sockaddr *)&ss;
+ return __ivaliduser_sa(hostf, sa, 0, luser, ruser);
}
-/*
- * Returns 1 for blank lines (or only comment lines) and 0 otherwise
- */
-static int
-__isempty (char *p)
+int
+__ivaliduser_sa(hostf, raddr, salen, luser, ruser)
+ FILE *hostf;
+ const struct sockaddr *raddr;
+ socklen_t salen;
+ const char *luser, *ruser;
{
- while (*p && isspace (*p)) {
- ++p;
- }
-
- return (*p == '\0' || *p == '#') ? 1 : 0 ;
+ char *user, *p;
+ int ch;
+ char buf[MAXHOSTNAMELEN + 128]; /* host + login */
+ char hname[MAXHOSTNAMELEN];
+ /* Presumed guilty until proven innocent. */
+ int userok = 0, hostok = 0;
+#ifdef YP
+ char *ypdomain;
+
+ if (yp_get_default_domain(&ypdomain))
+ ypdomain = NULL;
+#else
+#define ypdomain NULL
+#endif
+ /* We need to get the damn hostname back for netgroup matching. */
+ if (getnameinfo(raddr, salen, hname, sizeof(hname), NULL, 0,
+ NI_NAMEREQD) != 0)
+ return (-1);
+
+ while (fgets(buf, sizeof(buf), hostf)) {
+ p = buf;
+ /* Skip lines that are too long. */
+ if (strchr(p, '\n') == NULL) {
+ while ((ch = getc(hostf)) != '\n' && ch != EOF);
+ continue;
+ }
+ if (*p == '\n' || *p == '#') {
+ /* comment... */
+ continue;
+ }
+ while (*p != '\n' && *p != ' ' && *p != '\t' && *p != '\0') {
+ *p = isupper((unsigned char)*p) ? tolower((unsigned char)*p) : *p;
+ p++;
+ }
+ if (*p == ' ' || *p == '\t') {
+ *p++ = '\0';
+ while (*p == ' ' || *p == '\t')
+ p++;
+ user = p;
+ while (*p != '\n' && *p != ' ' &&
+ *p != '\t' && *p != '\0')
+ p++;
+ } else
+ user = p;
+ *p = '\0';
+ /*
+ * Do +/- and +@/-@ checking. This looks really nasty,
+ * but it matches SunOS's behavior so far as I can tell.
+ */
+ switch(buf[0]) {
+ case '+':
+ if (!buf[1]) { /* '+' matches all hosts */
+ hostok = 1;
+ break;
+ }
+ if (buf[1] == '@') /* match a host by netgroup */
+ hostok = innetgr((char *)&buf[2],
+ (char *)&hname, NULL, ypdomain);
+ else /* match a host by addr */
+ hostok = __icheckhost(raddr, salen,
+ (char *)&buf[1]);
+ break;
+ case '-': /* reject '-' hosts and all their users */
+ if (buf[1] == '@') {
+ if (innetgr((char *)&buf[2],
+ (char *)&hname, NULL, ypdomain))
+ return(-1);
+ } else {
+ if (__icheckhost(raddr, salen,
+ (char *)&buf[1]))
+ return(-1);
+ }
+ break;
+ default: /* if no '+' or '-', do a simple match */
+ hostok = __icheckhost(raddr, salen, buf);
+ break;
+ }
+ switch(*user) {
+ case '+':
+ if (!*(user+1)) { /* '+' matches all users */
+ userok = 1;
+ break;
+ }
+ if (*(user+1) == '@') /* match a user by netgroup */
+ userok = innetgr(user+2, NULL, ruser, ypdomain);
+ else /* match a user by direct specification */
+ userok = !(strcmp(ruser, user+1));
+ break;
+ case '-': /* if we matched a hostname, */
+ if (hostok) { /* check for user field rejections */
+ if (!*(user+1))
+ return(-1);
+ if (*(user+1) == '@') {
+ if (innetgr(user+2, NULL,
+ ruser, ypdomain))
+ return(-1);
+ } else {
+ if (!strcmp(ruser, user+1))
+ return(-1);
+ }
+ }
+ break;
+ default: /* no rejections: try to match the user */
+ if (hostok)
+ userok = !(strcmp(ruser,*user ? user : luser));
+ break;
+ }
+ if (hostok && userok)
+ return(0);
+ }
+ return (-1);
}
/*
- * Returns 0 if positive match, -1 if _not_ ok.
+ * Returns "true" if match, 0 if no match.
+ *
+ * NI_WITHSCOPEID is useful for comparing sin6_scope_id portion
+ * if af == AF_INET6.
*/
static int
-__validuser2_sa(hostf, ra, ralen, luser, ruser, rhost)
- FILE *hostf;
- struct sockaddr *ra;
- size_t ralen;
- const char *luser, *ruser, *rhost;
+__icheckhost(raddr, salen, lhost)
+ const struct sockaddr *raddr;
+ socklen_t salen;
+ const char *lhost;
{
- register const char *user;
- register char *p;
- int hcheck, ucheck;
- char *buf = NULL;
- size_t bufsize = 0;
- int retval = -1;
-
- while (__getline (&buf, &bufsize, hostf) > 0) {
- buf[bufsize - 1] = '\0'; /* Make sure it's terminated. */
- p = buf;
-
- /* Skip empty or comment lines */
- if (__isempty (p)) {
- continue;
- }
-
- for (;*p && !isspace(*p); ++p) {
- *p = _tolower (*p);
+ struct sockaddr_in sin;
+ struct sockaddr_in6 *sin6;
+ struct addrinfo hints, *res, *r;
+ int error;
+ char h1[NI_MAXHOST], h2[NI_MAXHOST];
+
+ if (raddr->sa_family == AF_INET6) {
+ sin6 = (struct sockaddr_in6 *)raddr;
+ if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) {
+ memset(&sin, 0, sizeof(sin));
+ sin.sin_family = AF_INET;
+ memcpy(&sin.sin_addr, &sin6->sin6_addr.s6_addr[12],
+ sizeof(sin.sin_addr));
+ raddr = (struct sockaddr *)&sin;
+ salen = sizeof(struct sockaddr_in);
+ }
}
- /* Next we want to find the permitted name for the remote user. */
- if (*p == ' ' || *p == '\t') {
- /* <nul> terminate hostname and skip spaces */
- for (*p++='\0'; *p && isspace (*p); ++p);
-
- user = p; /* this is the user's name */
- while (*p && !isspace (*p))
- ++p; /* find end of user's name */
- } else
- user = p;
-
- *p = '\0'; /* <nul> terminate username (+host?) */
-
- /* buf -> host(?) ; user -> username(?) */
-
- /* First check host part */
- hcheck = __checkhost_sa (ra, ralen, buf, rhost);
-
- if (hcheck < 0)
- break;
-
- if (hcheck) {
- /* Then check user part */
- if (! (*user))
- user = luser;
-
- ucheck = __icheckuser (user, ruser);
-
- /* Positive 'host user' match? */
- if (ucheck > 0) {
- retval = 0;
- break;
- }
-
- /* Negative 'host -user' match? */
- if (ucheck < 0)
- break;
-
- /* Neither, go on looking for match */
+ h1[0] = '\0';
+ if (getnameinfo(raddr, salen, h1, sizeof(h1), NULL, 0,
+ NI_NUMERICHOST | NI_WITHSCOPEID) != 0)
+ return (0);
+
+ /* Resolve laddr into sockaddr */
+ memset(&hints, 0, sizeof(hints));
+ hints.ai_family = raddr->sa_family;
+ hints.ai_socktype = SOCK_DGRAM; /*XXX dummy*/
+ res = NULL;
+ error = getaddrinfo(lhost, "0", &hints, &res);
+ if (error)
+ return (0);
+
+ for (r = res; r ; r = r->ai_next) {
+ h2[0] = '\0';
+ if (getnameinfo(r->ai_addr, r->ai_addrlen, h2, sizeof(h2),
+ NULL, 0, NI_NUMERICHOST | NI_WITHSCOPEID) != 0)
+ continue;
+ if (strcmp(h1, h2) == 0) {
+ freeaddrinfo(res);
+ return (1);
+ }
}
- }
-
- if (buf != NULL)
- free (buf);
- return retval;
+ /* No match. */
+ freeaddrinfo(res);
+ return (0);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-06 17:11:43 +0300