diff options
Diffstat (limited to 'crypto/kerberosIV/appl/kip/kipd.c')
-rw-r--r-- | crypto/kerberosIV/appl/kip/kipd.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/crypto/kerberosIV/appl/kip/kipd.c b/crypto/kerberosIV/appl/kip/kipd.c new file mode 100644 index 0000000..6d9d334 --- /dev/null +++ b/crypto/kerberosIV/appl/kip/kipd.c @@ -0,0 +1,128 @@ +/* + * Copyright (c) 1995, 1996, 1997 Kungliga Tekniska Högskolan + * (Royal Institute of Technology, Stockholm, Sweden). + * 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 Kungliga Tekniska + * Högskolan and its contributors. + * + * 4. Neither the name of the Institute 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 INSTITUTE 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 INSTITUTE 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. + */ + +#include "kip.h" + +RCSID("$Id: kipd.c,v 1.13 1997/05/18 20:38:01 assar Exp $"); + +static int +fatal (int fd, char *s) +{ + u_char err = 1; + + write (fd, &err, sizeof(err)); + write (fd, s, strlen(s)+1); + syslog(LOG_ERR, s); + return err; +} + +static int +recv_conn (int sock, des_cblock *key, des_key_schedule schedule, + struct sockaddr_in *retaddr) +{ + int status; + KTEXT_ST ticket; + AUTH_DAT auth; + char instance[INST_SZ + 1]; + struct sockaddr_in thisaddr, thataddr; + int addrlen; + char version[KRB_SENDAUTH_VLEN + 1]; + u_char ok = 0; + struct passwd *passwd; + + addrlen = sizeof(thisaddr); + if (getsockname (sock, (struct sockaddr *)&thisaddr, &addrlen) < 0 || + addrlen != sizeof(thisaddr)) { + return 1; + } + addrlen = sizeof(thataddr); + if (getpeername (sock, (struct sockaddr *)&thataddr, &addrlen) < 0 || + addrlen != sizeof(thataddr)) { + return 1; + } + + k_getsockinst (sock, instance, sizeof(instance)); + status = krb_recvauth (KOPT_DO_MUTUAL, sock, &ticket, "rcmd", instance, + &thataddr, &thisaddr, &auth, "", schedule, + version); + if (status != KSUCCESS || + strncmp(version, KIP_VERSION, KRB_SENDAUTH_VLEN) != 0) { + return 1; + } + passwd = k_getpwnam ("root"); + if (passwd == NULL) + return fatal (sock, "Cannot find root"); + if (kuserok(&auth, "root") != 0) + return fatal (sock, "Permission denied"); + if (write (sock, &ok, sizeof(ok)) != sizeof(ok)) + return 1; + + memcpy(key, &auth.session, sizeof(des_cblock)); + *retaddr = thataddr; + return 0; +} + +static int +doit(int sock) +{ + struct sockaddr_in thataddr; + des_key_schedule schedule; + des_cblock key; + int this; + + if (recv_conn (sock, &key, schedule, &thataddr)) + return 1; + this = tunnel_open (); + if (this < 0) + fatal (sock, "Cannot open " _PATH_DEV TUNDEV); + return copy_packets (this, sock, TUNMTU, &key, schedule); +} + +/* + * kipd - receive forwarded IP + */ + +int +main (int argc, char **argv) +{ + set_progname (argv[0]); + + openlog(__progname, LOG_PID|LOG_CONS, LOG_DAEMON); + signal (SIGCHLD, childhandler); + return doit(0); +} |