diff options
author | markm <markm@FreeBSD.org> | 1997-09-04 06:04:33 +0000 |
---|---|---|
committer | markm <markm@FreeBSD.org> | 1997-09-04 06:04:33 +0000 |
commit | a8a89cfaf983bc64f4b42f7c35209a5a36dd0fe8 (patch) | |
tree | 0b84977f19022a965f8c6145f067f951173f6290 /crypto/kerberosIV/appl/bsd/kcmd.c | |
download | FreeBSD-src-a8a89cfaf983bc64f4b42f7c35209a5a36dd0fe8.zip FreeBSD-src-a8a89cfaf983bc64f4b42f7c35209a5a36dd0fe8.tar.gz |
Initial import of KTH eBones. This has been cleaned up to only include
the "core" Kerberos functionality. The rest of the userland will get their
own changes later.
Diffstat (limited to 'crypto/kerberosIV/appl/bsd/kcmd.c')
-rw-r--r-- | crypto/kerberosIV/appl/bsd/kcmd.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/crypto/kerberosIV/appl/bsd/kcmd.c b/crypto/kerberosIV/appl/bsd/kcmd.c new file mode 100644 index 0000000..9fa7ab2 --- /dev/null +++ b/crypto/kerberosIV/appl/bsd/kcmd.c @@ -0,0 +1,270 @@ +/* + * Copyright (c) 1983, 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. + */ + +#include "bsd_locl.h" + +RCSID("$Id: kcmd.c,v 1.19 1997/05/02 14:27:42 assar Exp $"); + +#define START_PORT 5120 /* arbitrary */ + +static int +getport(int *alport) +{ + struct sockaddr_in sin; + int s; + + sin.sin_family = AF_INET; + sin.sin_addr.s_addr = INADDR_ANY; + s = socket(AF_INET, SOCK_STREAM, 0); + if (s < 0) + return (-1); + for (;;) { + sin.sin_port = htons((u_short)*alport); + if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0) + return (s); + if (errno != EADDRINUSE) { + close(s); + return (-1); + } + (*alport)--; +#ifdef ATHENA_COMPAT + if (*alport == IPPORT_RESERVED/2) { +#else + if (*alport == IPPORT_RESERVED) { +#endif + close(s); + errno = EAGAIN; /* close */ + return (-1); + } + } +} + +int +kcmd(int *sock, + char **ahost, + u_int16_t rport, + char *locuser, + char *remuser, + char *cmd, + int *fd2p, + KTEXT ticket, + char *service, + char *realm, + CREDENTIALS *cred, + Key_schedule schedule, + MSG_DAT *msg_data, + struct sockaddr_in *laddr, + struct sockaddr_in *faddr, + int32_t authopts) +{ + int s, timo = 1; + pid_t pid; + struct sockaddr_in sin, from; + char c; +#ifdef ATHENA_COMPAT + int lport = IPPORT_RESERVED - 1; +#else + int lport = START_PORT; +#endif + struct hostent *hp; + int rc; + char *host_save; + int status; + + pid = getpid(); + hp = gethostbyname(*ahost); + if (hp == NULL) { + /* fprintf(stderr, "%s: unknown host\n", *ahost); */ + return (-1); + } + + host_save = strdup(hp->h_name); + if (host_save == NULL) + return -1; + *ahost = host_save; + + /* If realm is null, look up from table */ + if (realm == NULL || realm[0] == '\0') + realm = krb_realmofhost(host_save); + + for (;;) { + s = getport(&lport); + if (s < 0) { + if (errno == EAGAIN) + warnx("kcmd(socket): All ports in use\n"); + else + warn("kcmd: socket"); + return (-1); + } + sin.sin_family = hp->h_addrtype; + memcpy (&sin.sin_addr, hp->h_addr, sizeof(sin.sin_addr)); + sin.sin_port = rport; + if (connect(s, (struct sockaddr *)&sin, sizeof(sin)) >= 0) + break; + close(s); + if (errno == EADDRINUSE) { + lport--; + continue; + } + /* + * don't wait very long for Kerberos rcmd. + */ + if (errno == ECONNREFUSED && timo <= 4) { + /* sleep(timo); don't wait at all here */ + timo *= 2; + continue; + } + if (hp->h_addr_list[1] != NULL) { + warn ("kcmd: connect (%s)", + inet_ntoa(sin.sin_addr)); + hp->h_addr_list++; + memcpy(&sin.sin_addr, + hp->h_addr_list[0], + sizeof(sin.sin_addr)); + fprintf(stderr, "Trying %s...\n", + inet_ntoa(sin.sin_addr)); + continue; + } + if (errno != ECONNREFUSED) + warn ("connect(%s)", hp->h_name); + return (-1); + } + lport--; + if (fd2p == 0) { + write(s, "", 1); + lport = 0; + } else { + char num[8]; + int s2 = getport(&lport), s3; + int len = sizeof(from); + + if (s2 < 0) { + status = -1; + goto bad; + } + listen(s2, 1); + snprintf(num, sizeof(num), "%d", lport); + if (write(s, num, strlen(num) + 1) != strlen(num) + 1) { + warn("kcmd(write): setting up stderr"); + close(s2); + status = -1; + goto bad; + } + { + fd_set fds; + FD_ZERO(&fds); + FD_SET(s, &fds); + FD_SET(s2, &fds); + status = select(FD_SETSIZE, &fds, NULL, NULL, NULL); + if(FD_ISSET(s, &fds)){ + warnx("kcmd: connection unexpectedly closed."); + close(s2); + status = -1; + goto bad; + } + } + s3 = accept(s2, (struct sockaddr *)&from, &len); + close(s2); + if (s3 < 0) { + warn ("kcmd: accept"); + lport = 0; + status = -1; + goto bad; + } + + *fd2p = s3; + from.sin_port = ntohs((u_short)from.sin_port); + if (from.sin_family != AF_INET || + from.sin_port >= IPPORT_RESERVED) { + warnx("kcmd(socket): " + "protocol failure in circuit setup."); + status = -1; + goto bad2; + } + } + /* + * Kerberos-authenticated service. Don't have to send locuser, + * since its already in the ticket, and we'll extract it on + * the other side. + */ + /* write(s, locuser, strlen(locuser)+1); */ + + /* set up the needed stuff for mutual auth, but only if necessary */ + if (authopts & KOPT_DO_MUTUAL) { + int sin_len; + *faddr = sin; + + sin_len = sizeof(struct sockaddr_in); + if (getsockname(s, (struct sockaddr *)laddr, &sin_len) < 0) { + warn("kcmd(getsockname)"); + status = -1; + goto bad2; + } + } + if ((status = krb_sendauth(authopts, s, ticket, service, *ahost, + realm, (unsigned long) getpid(), msg_data, + cred, schedule, + laddr, + faddr, + "KCMDV0.1")) != KSUCCESS) + goto bad2; + + write(s, remuser, strlen(remuser)+1); + write(s, cmd, strlen(cmd)+1); + + if ((rc = read(s, &c, 1)) != 1) { + if (rc == -1) + warn("read(%s)", *ahost); + else + warnx("kcmd: bad connection with remote host"); + status = -1; + goto bad2; + } + if (c != '\0') { + while (read(s, &c, 1) == 1) { + write(2, &c, 1); + if (c == '\n') + break; + } + status = -1; + goto bad2; + } + *sock = s; + return (KSUCCESS); +bad2: + if (lport) + close(*fd2p); +bad: + close(s); + return (status); +} |