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-rw-r--r--crypto/kerberosIV/appl/bsd/rlogind.c970
1 files changed, 0 insertions, 970 deletions
diff --git a/crypto/kerberosIV/appl/bsd/rlogind.c b/crypto/kerberosIV/appl/bsd/rlogind.c
deleted file mode 100644
index eae2dd6..0000000
--- a/crypto/kerberosIV/appl/bsd/rlogind.c
+++ /dev/null
@@ -1,970 +0,0 @@
-/*-
- * Copyright (c) 1983, 1988, 1989, 1993
- * 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.
- */
-
-/*
- * remote login server:
- * \0
- * remuser\0
- * locuser\0
- * terminal_type/speed\0
- * data
- */
-
-#include "bsd_locl.h"
-
-RCSID("$Id: rlogind.c,v 1.109.2.2 2000/06/23 02:37:06 assar Exp $");
-
-extern int __check_rhosts_file;
-
-char *INSECURE_MESSAGE =
-"\r\n*** Connection not encrypted! Communication may be eavesdropped. ***"
-"\r\n*** Use telnet or rlogin -x instead! ***\r\n";
-
-#ifndef NOENCRYPTION
-char *SECURE_MESSAGE =
-"This rlogin session is using DES encryption for all transmissions.\r\n";
-#else
-#define SECURE_MESSAGE INSECURE_MESSAGE
-#endif
-
-AUTH_DAT *kdata;
-KTEXT ticket;
-u_char auth_buf[sizeof(AUTH_DAT)];
-u_char tick_buf[sizeof(KTEXT_ST)];
-Key_schedule schedule;
-int doencrypt, retval, use_kerberos, vacuous;
-
-#define ARGSTR "Daip:lnkvxL:"
-
-char *env[2];
-#define NMAX 30
-char lusername[NMAX+1], rusername[NMAX+1];
-static char term[64] = "TERM=";
-#define ENVSIZE (sizeof("TERM=")-1) /* skip null for concatenation */
-int keepalive = 1;
-int check_all = 0;
-int no_delay = 0;
-
-struct passwd *pwd;
-
-static const char *new_login = _PATH_LOGIN;
-
-static void doit (int, struct sockaddr_in *);
-static int control (int, char *, int);
-static void protocol (int, int);
-static RETSIGTYPE cleanup (int);
-void fatal (int, const char *, int);
-static int do_rlogin (struct sockaddr_in *);
-static void setup_term (int);
-static int do_krb_login (struct sockaddr_in *);
-static void usage (void);
-
-static int
-readstream(int p, char *ibuf, int bufsize)
-{
-#ifndef HAVE_GETMSG
- return read(p, ibuf, bufsize);
-#else
- static int flowison = -1; /* current state of flow: -1 is unknown */
- static struct strbuf strbufc, strbufd;
- static unsigned char ctlbuf[BUFSIZ];
- static int use_read = 1;
-
- int flags = 0;
- int ret;
- struct termios tsp;
-
- struct iocblk ip;
- char vstop, vstart;
- int ixon;
- int newflow;
-
- if (use_read)
- {
- ret = read(p, ibuf, bufsize);
- if (ret < 0 && errno == EBADMSG)
- use_read = 0;
- else
- return ret;
- }
-
- strbufc.maxlen = BUFSIZ;
- strbufc.buf = (char *)ctlbuf;
- strbufd.maxlen = bufsize-1;
- strbufd.len = 0;
- strbufd.buf = ibuf+1;
- ibuf[0] = 0;
-
- ret = getmsg(p, &strbufc, &strbufd, &flags);
- if (ret < 0) /* error of some sort -- probably EAGAIN */
- return(-1);
-
- if (strbufc.len <= 0 || ctlbuf[0] == M_DATA) {
- /* data message */
- if (strbufd.len > 0) { /* real data */
- return(strbufd.len + 1); /* count header char */
- } else {
- /* nothing there */
- errno = EAGAIN;
- return(-1);
- }
- }
-
- /*
- * It's a control message. Return 1, to look at the flag we set
- */
-
- switch (ctlbuf[0]) {
- case M_FLUSH:
- if (ibuf[1] & FLUSHW)
- ibuf[0] = TIOCPKT_FLUSHWRITE;
- return(1);
-
- case M_IOCTL:
- memcpy(&ip, (ibuf+1), sizeof(ip));
-
- switch (ip.ioc_cmd) {
-#ifdef TCSETS
- case TCSETS:
- case TCSETSW:
- case TCSETSF:
- memcpy(&tsp,
- (ibuf+1 + sizeof(struct iocblk)),
- sizeof(tsp));
- vstop = tsp.c_cc[VSTOP];
- vstart = tsp.c_cc[VSTART];
- ixon = tsp.c_iflag & IXON;
- break;
-#endif
- default:
- errno = EAGAIN;
- return(-1);
- }
-
- newflow = (ixon && (vstart == 021) && (vstop == 023)) ? 1 : 0;
- if (newflow != flowison) { /* it's a change */
- flowison = newflow;
- ibuf[0] = newflow ? TIOCPKT_DOSTOP : TIOCPKT_NOSTOP;
- return(1);
- }
- }
-
- /* nothing worth doing anything about */
- errno = EAGAIN;
- return(-1);
-#endif
-}
-
-#ifdef HAVE_UTMPX_H
-static int
-rlogind_logout(const char *line)
-{
- struct utmpx utmpx, *utxp;
- int ret = 1;
-
- setutxent ();
- memset(&utmpx, 0, sizeof(utmpx));
- utmpx.ut_type = USER_PROCESS;
- strncpy(utmpx.ut_line, line, sizeof(utmpx.ut_line));
- utxp = getutxline(&utmpx);
- if (utxp) {
- utxp->ut_user[0] = '\0';
- utxp->ut_type = DEAD_PROCESS;
-#ifdef HAVE_STRUCT_UTMPX_UT_EXIT
-#ifdef _STRUCT___EXIT_STATUS
- utxp->ut_exit.__e_termination = 0;
- utxp->ut_exit.__e_exit = 0;
-#elif defined(__osf__) /* XXX */
- utxp->ut_exit.ut_termination = 0;
- utxp->ut_exit.ut_exit = 0;
-#else
- utxp->ut_exit.e_termination = 0;
- utxp->ut_exit.e_exit = 0;
-#endif
-#endif
- gettimeofday(&utxp->ut_tv, NULL);
- pututxline(utxp);
-#ifdef WTMPX_FILE
- updwtmpx(WTMPX_FILE, utxp);
-#else
- ret = 0;
-#endif
- }
- endutxent();
- return ret;
-}
-#else
-static int
-rlogind_logout(const char *line)
-{
- FILE *fp;
- struct utmp ut;
- int rval;
-
- if (!(fp = fopen(_PATH_UTMP, "r+")))
- return(0);
- rval = 1;
- while (fread(&ut, sizeof(struct utmp), 1, fp) == 1) {
- if (!ut.ut_name[0] ||
- strncmp(ut.ut_line, line, sizeof(ut.ut_line)))
- continue;
- memset(ut.ut_name, 0, sizeof(ut.ut_name));
-#ifdef HAVE_STRUCT_UTMP_UT_HOST
- memset(ut.ut_host, 0, sizeof(ut.ut_host));
-#endif
-#ifdef HAVE_STRUCT_UTMP_UT_TYPE
- ut.ut_type = DEAD_PROCESS;
-#endif
-#ifdef HAVE_STRUCT_UTMP_UT_EXIT
-#ifdef _STRUCT___EXIT_STATUS
- ut.ut_exit.__e_termination = 0;
- ut.ut_exit.__e_exit = 0;
-#elif defined(__osf__) /* XXX */
- ut.ut_exit.ut_termination = 0;
- ut.ut_exit.ut_exit = 0;
-#else
- ut.ut_exit.e_termination = 0;
- ut.ut_exit.e_exit = 0;
-#endif
-#endif
- ut.ut_time = time(NULL);
- fseek(fp, (long)-sizeof(struct utmp), SEEK_CUR);
- fwrite(&ut, sizeof(struct utmp), 1, fp);
- fseek(fp, (long)0, SEEK_CUR);
- rval = 0;
- }
- fclose(fp);
- return(rval);
-}
-#endif
-
-#ifndef HAVE_LOGWTMP
-static void
-logwtmp(const char *line, const char *name, const char *host)
-{
- struct utmp ut;
- struct stat buf;
- int fd;
-
- memset (&ut, 0, sizeof(ut));
- if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
- return;
- if (!fstat(fd, &buf)) {
- strncpy(ut.ut_line, line, sizeof(ut.ut_line));
- strncpy(ut.ut_name, name, sizeof(ut.ut_name));
-#ifdef HAVE_STRUCT_UTMP_UT_ID
- strncpy(ut.ut_id, make_id((char *)line), sizeof(ut.ut_id));
-#endif
-#ifdef HAVE_STRUCT_UTMP_UT_HOST
- strncpy(ut.ut_host, host, sizeof(ut.ut_host));
-#endif
-#ifdef HAVE_STRUCT_UTMP_UT_PID
- ut.ut_pid = getpid();
-#endif
-#ifdef HAVE_STRUCT_UTMP_UT_TYPE
- if(name[0])
- ut.ut_type = USER_PROCESS;
- else
- ut.ut_type = DEAD_PROCESS;
-#endif
- ut.ut_time = time(NULL);
- if (write(fd, &ut, sizeof(struct utmp)) !=
- sizeof(struct utmp))
- ftruncate(fd, buf.st_size);
- }
- close(fd);
-}
-#endif
-
-int
-main(int argc, char **argv)
-{
- struct sockaddr_in from;
- int ch, fromlen, on;
- int interactive = 0;
- int portnum = 0;
-
- set_progname(argv[0]);
-
- openlog("rlogind", LOG_PID | LOG_CONS, LOG_AUTH);
-
- opterr = 0;
- while ((ch = getopt(argc, argv, ARGSTR)) != -1)
- switch (ch) {
- case 'D':
- no_delay = 1;
- break;
- case 'a':
- break;
- case 'i':
- interactive = 1;
- break;
- case 'p':
- portnum = htons(atoi(optarg));
- break;
- case 'l':
- __check_rhosts_file = 0;
- break;
- case 'n':
- keepalive = 0;
- break;
- case 'k':
- use_kerberos = 1;
- break;
- case 'v':
- vacuous = 1;
- break;
- case 'x':
- doencrypt = 1;
- break;
- case 'L':
- new_login = optarg;
- break;
- case '?':
- default:
- usage();
- break;
- }
- argc -= optind;
- argv += optind;
-
- if (use_kerberos && vacuous) {
- usage();
- fatal(STDERR_FILENO, "only one of -k and -v allowed", 0);
- }
- if (interactive) {
- if(portnum == 0)
- portnum = get_login_port (use_kerberos, doencrypt);
- mini_inetd (portnum);
- }
-
- fromlen = sizeof (from);
- if (getpeername(0, (struct sockaddr *)&from, &fromlen) < 0) {
- syslog(LOG_ERR,"Can't get peer name of remote host: %m");
- fatal(STDERR_FILENO, "Can't get peer name of remote host", 1);
- }
- on = 1;
-#ifdef HAVE_SETSOCKOPT
-#ifdef SO_KEEPALIVE
- if (keepalive &&
- setsockopt(0, SOL_SOCKET, SO_KEEPALIVE, (void *)&on,
- sizeof (on)) < 0)
- syslog(LOG_WARNING, "setsockopt (SO_KEEPALIVE): %m");
-#endif
-#ifdef TCP_NODELAY
- if (no_delay &&
- setsockopt(0, IPPROTO_TCP, TCP_NODELAY, (void *)&on,
- sizeof(on)) < 0)
- syslog(LOG_WARNING, "setsockopt (TCP_NODELAY): %m");
-#endif
-
-#ifdef IP_TOS
- on = IPTOS_LOWDELAY;
- if (setsockopt(0, IPPROTO_IP, IP_TOS, (void *)&on, sizeof(int)) < 0)
- syslog(LOG_WARNING, "setsockopt (IP_TOS): %m");
-#endif
-#endif /* HAVE_SETSOCKOPT */
- doit(0, &from);
- return 0;
-}
-
-int child;
-int netf;
-char line[MaxPathLen];
-int confirmed;
-
-struct winsize win = { 0, 0, 0, 0 };
-
-
-static void
-doit(int f, struct sockaddr_in *fromp)
-{
- int master, pid, on = 1;
- int authenticated = 0;
- char hostname[2 * MaxHostNameLen + 1];
- char c;
-
- alarm(60);
- read(f, &c, 1);
-
- if (c != 0)
- exit(1);
- if (vacuous)
- fatal(f, "Remote host requires Kerberos authentication", 0);
-
- alarm(0);
- inaddr2str (fromp->sin_addr, hostname, sizeof(hostname));
-
- if (use_kerberos) {
- retval = do_krb_login(fromp);
- if (retval == 0)
- authenticated++;
- else if (retval > 0)
- fatal(f, krb_get_err_text(retval), 0);
- write(f, &c, 1);
- confirmed = 1; /* we sent the null! */
- } else {
- fromp->sin_port = ntohs((u_short)fromp->sin_port);
- 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);
- }
- ip_options_and_die (0, fromp);
- if (do_rlogin(fromp) == 0)
- authenticated++;
- }
- if (confirmed == 0) {
- write(f, "", 1);
- confirmed = 1; /* we sent the null! */
- }
-#ifndef NOENCRYPTION
- if (doencrypt)
- des_enc_write(f, SECURE_MESSAGE,
- strlen(SECURE_MESSAGE),
- schedule, &kdata->session);
- else
-#endif
- write(f, INSECURE_MESSAGE, strlen(INSECURE_MESSAGE));
- netf = f;
-
-#ifdef HAVE_FORKPTY
- pid = forkpty(&master, line, NULL, NULL);
-#else
- pid = forkpty_truncate(&master, line, sizeof(line), NULL, NULL);
-#endif
- if (pid < 0) {
- if (errno == ENOENT)
- fatal(f, "Out of ptys", 0);
- else
- fatal(f, "Forkpty", 1);
- }
- if (pid == 0) {
- if (f > 2) /* f should always be 0, but... */
- close(f);
- setup_term(0);
- if (lusername[0] == '-'){
- syslog(LOG_ERR, "tried to pass user \"%s\" to login",
- lusername);
- fatal(STDERR_FILENO, "invalid user", 0);
- }
- if (authenticated) {
- if (use_kerberos && (pwd->pw_uid == 0))
- syslog(LOG_INFO|LOG_AUTH,
- "ROOT Kerberos login from %s on %s\n",
- krb_unparse_name_long(kdata->pname,
- kdata->pinst,
- kdata->prealm),
- hostname);
-
- execl(new_login, "login", "-p",
- "-h", hostname, "-f", "--", lusername, 0);
- } else if (use_kerberos) {
- fprintf(stderr, "User `%s' is not authorized to login as `%s'!\n",
- krb_unparse_name_long(kdata->pname,
- kdata->pinst,
- kdata->prealm),
- lusername);
- exit(1);
- } else
- execl(new_login, "login", "-p",
- "-h", hostname, "--", lusername, 0);
- fatal(STDERR_FILENO, new_login, 1);
- /*NOTREACHED*/
- }
- /*
- * If encrypted, don't turn on NBIO or the des read/write
- * routines will croak.
- */
-
- if (!doencrypt)
- ioctl(f, FIONBIO, &on);
- ioctl(master, FIONBIO, &on);
- ioctl(master, TIOCPKT, &on);
-#ifdef SIGTSTP
- signal(SIGTSTP, SIG_IGN);
-#endif
- signal(SIGCHLD, cleanup);
- setsid();
- protocol(f, master);
- signal(SIGCHLD, SIG_IGN);
- cleanup(0);
-}
-
-const char magic[2] = { 0377, 0377 };
-
-/*
- * Handle a "control" request (signaled by magic being present)
- * in the data stream. For now, we are only willing to handle
- * window size changes.
- */
-static int
-control(int master, char *cp, int n)
-{
- struct winsize w;
- char *p;
- u_int32_t tmp;
-
- if (n < 4 + 4 * sizeof (u_int16_t) || cp[2] != 's' || cp[3] != 's')
- return (0);
-#ifdef TIOCSWINSZ
- p = cp + 4;
- p += krb_get_int(p, &tmp, 2, 0);
- w.ws_row = tmp;
- p += krb_get_int(p, &tmp, 2, 0);
- w.ws_col = tmp;
-
- p += krb_get_int(p, &tmp, 2, 0);
-#ifdef HAVE_WS_XPIXEL
- w.ws_xpixel = tmp;
-#endif
- p += krb_get_int(p, &tmp, 2, 0);
-#ifdef HAVE_WS_YPIXEL
- w.ws_ypixel = tmp;
-#endif
- ioctl(master, TIOCSWINSZ, &w);
-#endif
- return p - cp;
-}
-
-static
-void
-send_oob(int fd, char c)
-{
- static char last_oob = 0xFF;
-
-#if (SunOS >= 50) || defined(__hpux)
- /*
- * PSoriasis and HP-UX always send TIOCPKT_DOSTOP at startup so we
- * can avoid sending OOB data and thus not break on Linux by merging
- * TIOCPKT_DOSTOP into the first TIOCPKT_WINDOW.
- */
- static int oob_kludge = 2;
- if (oob_kludge == 2)
- {
- oob_kludge--; /* First time send nothing */
- return;
- }
- else if (oob_kludge == 1)
- {
- oob_kludge--; /* Second time merge TIOCPKT_WINDOW */
- c |= TIOCPKT_WINDOW;
- }
-#endif
-
-#define pkcontrol(c) ((c)&(TIOCPKT_FLUSHWRITE|TIOCPKT_NOSTOP|TIOCPKT_DOSTOP))
- c = pkcontrol(c);
- /* Multiple OOB data breaks on Linux, avoid it when possible. */
- if (c != last_oob)
- send(fd, &c, 1, MSG_OOB);
- last_oob = c;
-}
-
-/*
- * rlogin "protocol" machine.
- */
-static void
-protocol(int f, int master)
-{
- char pibuf[1024+1], fibuf[1024], *pbp, *fbp;
- int pcc = 0, fcc = 0;
- int cc, nfd, n;
- char cntl;
- unsigned char oob_queue = 0;
-
-#ifdef SIGTTOU
- /*
- * Must ignore SIGTTOU, otherwise we'll stop
- * when we try and set slave pty's window shape
- * (our controlling tty is the master pty).
- */
- signal(SIGTTOU, SIG_IGN);
-#endif
-
- send_oob(f, TIOCPKT_WINDOW); /* indicate new rlogin */
-
- if (f > master)
- nfd = f + 1;
- else
- nfd = master + 1;
- if (nfd > FD_SETSIZE) {
- syslog(LOG_ERR, "select mask too small, increase FD_SETSIZE");
- fatal(f, "internal error (select mask too small)", 0);
- }
- for (;;) {
- fd_set ibits, obits, ebits, *omask;
-
- FD_ZERO(&ebits);
- FD_ZERO(&ibits);
- FD_ZERO(&obits);
- omask = (fd_set *)NULL;
- if (fcc) {
- FD_SET(master, &obits);
- omask = &obits;
- } else
- FD_SET(f, &ibits);
- if (pcc >= 0) {
- if (pcc) {
- FD_SET(f, &obits);
- omask = &obits;
- } else
- FD_SET(master, &ibits);
- }
- FD_SET(master, &ebits);
- if ((n = select(nfd, &ibits, omask, &ebits, 0)) < 0) {
- if (errno == EINTR)
- continue;
- fatal(f, "select", 1);
- }
- if (n == 0) {
- /* shouldn't happen... */
- sleep(5);
- continue;
- }
- if (FD_ISSET(master, &ebits)) {
- cc = readstream(master, &cntl, 1);
- if (cc == 1 && pkcontrol(cntl)) {
-#if 0 /* Kludge around */
- send_oob(f, cntl);
-#endif
- oob_queue = cntl;
- if (cntl & TIOCPKT_FLUSHWRITE) {
- pcc = 0;
- FD_CLR(master, &ibits);
- }
- }
- }
- if (FD_ISSET(f, &ibits)) {
-#ifndef NOENCRYPTION
- if (doencrypt)
- fcc = des_enc_read(f, fibuf,
- sizeof(fibuf),
- schedule, &kdata->session);
- else
-#endif
- fcc = read(f, fibuf, sizeof(fibuf));
- if (fcc < 0 && errno == EWOULDBLOCK)
- fcc = 0;
- else {
- char *cp;
- int left, n;
-
- if (fcc <= 0)
- break;
- fbp = fibuf;
-
- top:
- for (cp = fibuf; cp < fibuf+fcc-1; cp++)
- if (cp[0] == magic[0] &&
- cp[1] == magic[1]) {
- left = fcc - (cp-fibuf);
- n = control(master, cp, left);
- if (n) {
- left -= n;
- if (left > 0)
- memmove(cp, cp+n, left);
- fcc -= n;
- goto top; /* n^2 */
- }
- }
- FD_SET(master, &obits); /* try write */
- }
- }
-
- if (FD_ISSET(master, &obits) && fcc > 0) {
- cc = write(master, fbp, fcc);
- if (cc > 0) {
- fcc -= cc;
- fbp += cc;
- }
- }
-
- if (FD_ISSET(master, &ibits)) {
- pcc = readstream(master, pibuf, sizeof (pibuf));
- pbp = pibuf;
- if (pcc < 0 && errno == EWOULDBLOCK)
- pcc = 0;
- else if (pcc <= 0)
- break;
- else if (pibuf[0] == 0) {
- pbp++, pcc--;
- if (!doencrypt)
- FD_SET(f, &obits); /* try write */
- } else {
- if (pkcontrol(pibuf[0])) {
- oob_queue = pibuf[0];
-#if 0 /* Kludge around */
- send_oob(f, pibuf[0]);
-#endif
- }
- pcc = 0;
- }
- }
- if ((FD_ISSET(f, &obits)) && pcc > 0) {
-#ifndef NOENCRYPTION
- if (doencrypt)
- cc = des_enc_write(f, pbp, pcc, schedule, &kdata->session);
- else
-#endif
- cc = write(f, pbp, pcc);
- if (cc < 0 && errno == EWOULDBLOCK) {
- /*
- * This happens when we try write after read
- * from p, but some old kernels balk at large
- * writes even when select returns true.
- */
- if (!FD_ISSET(master, &ibits))
- sleep(5);
- continue;
- }
- if (cc > 0) {
- pcc -= cc;
- pbp += cc;
- /* Only send urg data when normal data
- * has just been sent.
- * Linux has deep problems with more
- * than one byte of OOB data.
- */
- if (oob_queue) {
- send_oob (f, oob_queue);
- oob_queue = 0;
- }
- }
- }
- }
-}
-
-static RETSIGTYPE
-cleanup(int signo)
-{
- char *p = clean_ttyname (line);
-
- if (rlogind_logout(p) == 0)
- logwtmp(p, "", "");
- chmod(line, 0666);
- chown(line, 0, 0);
- *p = 'p';
- chmod(line, 0666);
- chown(line, 0, 0);
- shutdown(netf, 2);
- signal(SIGHUP, SIG_IGN);
-#ifdef HAVE_VHANGUP
- vhangup();
-#endif /* HAVE_VHANGUP */
- exit(1);
-}
-
-void
-fatal(int f, const char *msg, int syserr)
-{
- int len;
- char buf[BUFSIZ], *bp = buf;
-
- /*
- * Prepend binary one to message if we haven't sent
- * the magic null as confirmation.
- */
- if (!confirmed)
- *bp++ = '\01'; /* error indicator */
- if (syserr)
- snprintf(bp, sizeof(buf) - (bp - buf),
- "rlogind: %s: %s.\r\n",
- msg, strerror(errno));
- else
- snprintf(bp, sizeof(buf) - (bp - buf),
- "rlogind: %s.\r\n", msg);
- len = strlen(bp);
-#ifndef NOENCRYPTION
- if (doencrypt)
- des_enc_write(f, buf, bp + len - buf, schedule, &kdata->session);
- else
-#endif
- write(f, buf, bp + len - buf);
- exit(1);
-}
-
-static void
-xgetstr(char *buf, int cnt, char *errmsg)
-{
- char c;
-
- do {
- if (read(0, &c, 1) != 1)
- exit(1);
- if (--cnt < 0)
- fatal(STDOUT_FILENO, errmsg, 0);
- *buf++ = c;
- } while (c != 0);
-}
-
-static int
-do_rlogin(struct sockaddr_in *dest)
-{
- xgetstr(rusername, sizeof(rusername), "remuser too long");
- xgetstr(lusername, sizeof(lusername), "locuser too long");
- xgetstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type too long");
-
- pwd = k_getpwnam(lusername);
- if (pwd == NULL)
- return (-1);
- if (pwd->pw_uid == 0 && strcmp("root", lusername) != 0)
- {
- syslog(LOG_ALERT, "NIS attack, user %s has uid 0", lusername);
- return (-1);
- }
- return (iruserok(dest->sin_addr.s_addr,
- (pwd->pw_uid == 0),
- rusername,
- lusername));
-}
-
-static void
-setup_term(int fd)
-{
- char *cp = strchr(term+ENVSIZE, '/');
- char *speed;
- struct termios tt;
-
- tcgetattr(fd, &tt);
- if (cp) {
- int s;
-
- *cp++ = '\0';
- speed = cp;
- cp = strchr(speed, '/');
- if (cp)
- *cp++ = '\0';
- s = int2speed_t (atoi (speed));
- if (s > 0) {
- cfsetospeed (&tt, s);
- cfsetispeed (&tt, s);
- }
- }
-
- tt.c_iflag &= ~INPCK;
- tt.c_iflag |= ICRNL|IXON;
- tt.c_oflag |= OPOST|ONLCR;
-#ifdef TAB3
- tt.c_oflag |= TAB3;
-#endif /* TAB3 */
-#ifdef ONLRET
- tt.c_oflag &= ~ONLRET;
-#endif /* ONLRET */
- tt.c_lflag |= (ECHO|ECHOE|ECHOK|ISIG|ICANON);
- tt.c_cflag &= ~PARENB;
- tt.c_cflag |= CS8;
- tt.c_cc[VMIN] = 1;
- tt.c_cc[VTIME] = 0;
- tt.c_cc[VEOF] = CEOF;
- tcsetattr(fd, TCSAFLUSH, &tt);
-
- env[0] = term;
- env[1] = 0;
- environ = env;
-}
-
-#define VERSION_SIZE 9
-
-/*
- * Do the remote kerberos login to the named host with the
- * given inet address
- *
- * Return 0 on valid authorization
- * Return -1 on valid authentication, no authorization
- * Return >0 for error conditions
- */
-static int
-do_krb_login(struct sockaddr_in *dest)
-{
- int rc;
- char instance[INST_SZ], version[VERSION_SIZE];
- long authopts = 0L; /* !mutual */
- struct sockaddr_in faddr;
-
- kdata = (AUTH_DAT *) auth_buf;
- ticket = (KTEXT) tick_buf;
-
- k_getsockinst(0, instance, sizeof(instance));
-
- if (doencrypt) {
- rc = sizeof(faddr);
- if (getsockname(0, (struct sockaddr *)&faddr, &rc))
- return (-1);
- authopts = KOPT_DO_MUTUAL;
- rc = krb_recvauth(
- authopts, 0,
- ticket, "rcmd",
- instance, dest, &faddr,
- kdata, "", schedule, version);
- des_set_key(&kdata->session, schedule);
-
- } else
- rc = krb_recvauth(
- authopts, 0,
- ticket, "rcmd",
- instance, dest, (struct sockaddr_in *) 0,
- kdata, "", 0, version);
-
- if (rc != KSUCCESS)
- return (rc);
-
- xgetstr(lusername, sizeof(lusername), "locuser");
- /* get the "cmd" in the rcmd protocol */
- xgetstr(term+ENVSIZE, sizeof(term)-ENVSIZE, "Terminal type");
-
- pwd = k_getpwnam(lusername);
- if (pwd == NULL)
- return (-1);
- if (pwd->pw_uid == 0 && strcmp("root", lusername) != 0)
- {
- syslog(LOG_ALERT, "NIS attack, user %s has uid 0", lusername);
- return (-1);
- }
-
- /* returns nonzero for no access */
- if (kuserok(kdata, lusername) != 0)
- return (-1);
-
- return (0);
-
-}
-
-static void
-usage(void)
-{
- syslog(LOG_ERR,
- "usage: rlogind [-Dailn] [-p port] [-x] [-L login] [-k | -v]");
- exit(1);
-}
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