1 /* $OpenBSD: monitor_wrap.c,v 1.107 2018/07/20 03:46:34 djm Exp $ */
3 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
4 * Copyright 2002 Markus Friedl <markus@openbsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/types.h>
42 #include <openssl/bn.h>
43 #include <openssl/dh.h>
44 #include <openssl/evp.h>
47 #include "openbsd-compat/sys-queue.h"
59 #include "auth-options.h"
68 #include "monitor_wrap.h"
70 #include "monitor_fdpass.h"
80 extern struct monitor *pmonitor;
81 extern struct sshbuf *loginmsg;
82 extern ServerOptions options;
85 mm_log_handler(LogLevel level, const char *msg, void *ctx)
87 struct sshbuf *log_msg;
88 struct monitor *mon = (struct monitor *)ctx;
92 if (mon->m_log_sendfd == -1)
93 fatal("%s: no log channel", __func__);
95 if ((log_msg = sshbuf_new()) == NULL)
96 fatal("%s: sshbuf_new failed", __func__);
98 if ((r = sshbuf_put_u32(log_msg, 0)) != 0 || /* length; filled below */
99 (r = sshbuf_put_u32(log_msg, level)) != 0 ||
100 (r = sshbuf_put_cstring(log_msg, msg)) != 0)
101 fatal("%s: buffer error: %s", __func__, ssh_err(r));
102 if ((len = sshbuf_len(log_msg)) < 4 || len > 0xffffffff)
103 fatal("%s: bad length %zu", __func__, len);
104 POKE_U32(sshbuf_mutable_ptr(log_msg), len - 4);
105 if (atomicio(vwrite, mon->m_log_sendfd,
106 sshbuf_mutable_ptr(log_msg), len) != len)
107 fatal("%s: write: %s", __func__, strerror(errno));
108 sshbuf_free(log_msg);
115 * m_pid is only set in the privileged part, and
116 * points to the unprivileged child.
118 return (pmonitor && pmonitor->m_pid > 0);
122 mm_request_send(int sock, enum monitor_reqtype type, struct sshbuf *m)
124 size_t mlen = sshbuf_len(m);
127 debug3("%s entering: type %d", __func__, type);
129 if (mlen >= 0xffffffff)
130 fatal("%s: bad length %zu", __func__, mlen);
131 POKE_U32(buf, mlen + 1);
132 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
133 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
134 fatal("%s: write: %s", __func__, strerror(errno));
135 if (atomicio(vwrite, sock, sshbuf_mutable_ptr(m), mlen) != mlen)
136 fatal("%s: write: %s", __func__, strerror(errno));
140 mm_request_receive(int sock, struct sshbuf *m)
142 u_char buf[4], *p = NULL;
146 debug3("%s entering", __func__);
148 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
151 fatal("%s: read: %s", __func__, strerror(errno));
153 msg_len = PEEK_U32(buf);
154 if (msg_len > 256 * 1024)
155 fatal("%s: read: bad msg_len %d", __func__, msg_len);
157 if ((r = sshbuf_reserve(m, msg_len, &p)) != 0)
158 fatal("%s: buffer error: %s", __func__, ssh_err(r));
159 if (atomicio(read, sock, p, msg_len) != msg_len)
160 fatal("%s: read: %s", __func__, strerror(errno));
164 mm_request_receive_expect(int sock, enum monitor_reqtype type, struct sshbuf *m)
169 debug3("%s entering: type %d", __func__, type);
171 mm_request_receive(sock, m);
172 if ((r = sshbuf_get_u8(m, &rtype)) != 0)
173 fatal("%s: buffer error: %s", __func__, ssh_err(r));
175 fatal("%s: read: rtype %d != type %d", __func__,
181 mm_choose_dh(int min, int nbits, int max)
188 if ((m = sshbuf_new()) == NULL)
189 fatal("%s: sshbuf_new failed", __func__);
190 if ((r = sshbuf_put_u32(m, min)) != 0 ||
191 (r = sshbuf_put_u32(m, nbits)) != 0 ||
192 (r = sshbuf_put_u32(m, max)) != 0)
193 fatal("%s: buffer error: %s", __func__, ssh_err(r));
195 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, m);
197 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
198 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, m);
200 if ((r = sshbuf_get_u8(m, &success)) != 0)
201 fatal("%s: buffer error: %s", __func__, ssh_err(r));
203 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
205 if ((p = BN_new()) == NULL)
206 fatal("%s: BN_new failed", __func__);
207 if ((g = BN_new()) == NULL)
208 fatal("%s: BN_new failed", __func__);
209 if ((r = sshbuf_get_bignum2(m, p)) != 0 ||
210 (r = sshbuf_get_bignum2(m, g)) != 0)
211 fatal("%s: buffer error: %s", __func__, ssh_err(r));
213 debug3("%s: remaining %zu", __func__, sshbuf_len(m));
216 return (dh_new_group(g, p));
221 mm_sshkey_sign(struct sshkey *key, u_char **sigp, size_t *lenp,
222 const u_char *data, size_t datalen, const char *hostkey_alg, u_int compat)
224 struct kex *kex = *pmonitor->m_pkex;
226 u_int ndx = kex->host_key_index(key, 0, active_state);
229 debug3("%s entering", __func__);
231 if ((m = sshbuf_new()) == NULL)
232 fatal("%s: sshbuf_new failed", __func__);
233 if ((r = sshbuf_put_u32(m, ndx)) != 0 ||
234 (r = sshbuf_put_string(m, data, datalen)) != 0 ||
235 (r = sshbuf_put_cstring(m, hostkey_alg)) != 0 ||
236 (r = sshbuf_put_u32(m, compat)) != 0)
237 fatal("%s: buffer error: %s", __func__, ssh_err(r));
239 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, m);
241 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
242 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, m);
243 if ((r = sshbuf_get_string(m, sigp, lenp)) != 0)
244 fatal("%s: buffer error: %s", __func__, ssh_err(r));
251 mm_getpwnamallow(const char *username)
253 struct ssh *ssh = active_state; /* XXX */
258 ServerOptions *newopts;
263 debug3("%s entering", __func__);
265 if ((m = sshbuf_new()) == NULL)
266 fatal("%s: sshbuf_new failed", __func__);
267 if ((r = sshbuf_put_cstring(m, username)) != 0)
268 fatal("%s: buffer error: %s", __func__, ssh_err(r));
270 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, m);
272 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
273 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, m);
275 if ((r = sshbuf_get_u8(m, &ok)) != 0)
276 fatal("%s: buffer error: %s", __func__, ssh_err(r));
282 /* XXX don't like passing struct passwd like this */
283 pw = xcalloc(sizeof(*pw), 1);
284 if ((r = sshbuf_get_string_direct(m, &p, &len)) != 0)
285 fatal("%s: buffer error: %s", __func__, ssh_err(r));
286 if (len != sizeof(*pw))
287 fatal("%s: struct passwd size mismatch", __func__);
288 memcpy(pw, p, sizeof(*pw));
290 if ((r = sshbuf_get_cstring(m, &pw->pw_name, NULL)) != 0 ||
291 (r = sshbuf_get_cstring(m, &pw->pw_passwd, NULL)) != 0 ||
292 #ifdef HAVE_STRUCT_PASSWD_PW_GECOS
293 (r = sshbuf_get_cstring(m, &pw->pw_gecos, NULL)) != 0 ||
295 #ifdef HAVE_STRUCT_PASSWD_PW_CLASS
296 (r = sshbuf_get_cstring(m, &pw->pw_class, NULL)) != 0 ||
298 (r = sshbuf_get_cstring(m, &pw->pw_dir, NULL)) != 0 ||
299 (r = sshbuf_get_cstring(m, &pw->pw_shell, NULL)) != 0)
300 fatal("%s: buffer error: %s", __func__, ssh_err(r));
303 /* copy options block as a Match directive may have changed some */
304 if ((r = sshbuf_get_string_direct(m, &p, &len)) != 0)
305 fatal("%s: buffer error: %s", __func__, ssh_err(r));
306 if (len != sizeof(*newopts))
307 fatal("%s: option block size mismatch", __func__);
308 newopts = xcalloc(sizeof(*newopts), 1);
309 memcpy(newopts, p, sizeof(*newopts));
311 #define M_CP_STROPT(x) do { \
312 if (newopts->x != NULL) { \
313 if ((r = sshbuf_get_cstring(m, \
314 &newopts->x, NULL)) != 0) \
315 fatal("%s: buffer error: %s", \
316 __func__, ssh_err(r)); \
319 #define M_CP_STRARRAYOPT(x, nx) do { \
320 newopts->x = newopts->nx == 0 ? \
321 NULL : xcalloc(newopts->nx, sizeof(*newopts->x)); \
322 for (i = 0; i < newopts->nx; i++) { \
323 if ((r = sshbuf_get_cstring(m, \
324 &newopts->x[i], NULL)) != 0) \
325 fatal("%s: buffer error: %s", \
326 __func__, ssh_err(r)); \
329 /* See comment in servconf.h */
330 COPY_MATCH_STRING_OPTS();
332 #undef M_CP_STRARRAYOPT
334 copy_set_server_options(&options, newopts, 1);
335 log_change_level(options.log_level);
336 process_permitopen(ssh, &options);
345 mm_auth2_read_banner(void)
351 debug3("%s entering", __func__);
353 if ((m = sshbuf_new()) == NULL)
354 fatal("%s: sshbuf_new failed", __func__);
355 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, m);
358 mm_request_receive_expect(pmonitor->m_recvfd,
359 MONITOR_ANS_AUTH2_READ_BANNER, m);
360 if ((r = sshbuf_get_cstring(m, &banner, NULL)) != 0)
361 fatal("%s: buffer error: %s", __func__, ssh_err(r));
364 /* treat empty banner as missing banner */
365 if (strlen(banner) == 0) {
372 /* Inform the privileged process about service and style */
375 mm_inform_authserv(char *service, char *style)
380 debug3("%s entering", __func__);
382 if ((m = sshbuf_new()) == NULL)
383 fatal("%s: sshbuf_new failed", __func__);
384 if ((r = sshbuf_put_cstring(m, service)) != 0 ||
385 (r = sshbuf_put_cstring(m, style ? style : "")) != 0)
386 fatal("%s: buffer error: %s", __func__, ssh_err(r));
388 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, m);
393 /* Do the password authentication */
395 mm_auth_password(struct ssh *ssh, char *password)
398 int r, authenticated = 0;
403 debug3("%s entering", __func__);
405 if ((m = sshbuf_new()) == NULL)
406 fatal("%s: sshbuf_new failed", __func__);
407 if ((r = sshbuf_put_cstring(m, password)) != 0)
408 fatal("%s: buffer error: %s", __func__, ssh_err(r));
409 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, m);
411 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
412 mm_request_receive_expect(pmonitor->m_recvfd,
413 MONITOR_ANS_AUTHPASSWORD, m);
415 if ((r = sshbuf_get_u32(m, &authenticated)) != 0)
416 fatal("%s: buffer error: %s", __func__, ssh_err(r));
418 if ((r = sshbuf_get_u32(m, &maxtries)) != 0)
419 fatal("%s: buffer error: %s", __func__, ssh_err(r));
420 if (maxtries > INT_MAX)
421 fatal("%s: bad maxtries %u", __func__, maxtries);
422 sshpam_set_maxtries_reached(maxtries);
427 debug3("%s: user %sauthenticated",
428 __func__, authenticated ? "" : "not ");
429 return (authenticated);
433 mm_user_key_allowed(struct ssh *ssh, struct passwd *pw, struct sshkey *key,
434 int pubkey_auth_attempt, struct sshauthopt **authoptp)
436 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key,
437 pubkey_auth_attempt, authoptp));
441 mm_hostbased_key_allowed(struct passwd *pw, const char *user, const char *host,
444 return (mm_key_allowed(MM_HOSTKEY, user, host, key, 0, NULL));
448 mm_key_allowed(enum mm_keytype type, const char *user, const char *host,
449 struct sshkey *key, int pubkey_auth_attempt, struct sshauthopt **authoptp)
453 struct sshauthopt *opts = NULL;
455 debug3("%s entering", __func__);
457 if (authoptp != NULL)
460 if ((m = sshbuf_new()) == NULL)
461 fatal("%s: sshbuf_new failed", __func__);
462 if ((r = sshbuf_put_u32(m, type)) != 0 ||
463 (r = sshbuf_put_cstring(m, user ? user : "")) != 0 ||
464 (r = sshbuf_put_cstring(m, host ? host : "")) != 0 ||
465 (r = sshkey_puts(key, m)) != 0 ||
466 (r = sshbuf_put_u32(m, pubkey_auth_attempt)) != 0)
467 fatal("%s: buffer error: %s", __func__, ssh_err(r));
469 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, m);
471 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
472 mm_request_receive_expect(pmonitor->m_recvfd,
473 MONITOR_ANS_KEYALLOWED, m);
475 if ((r = sshbuf_get_u32(m, &allowed)) != 0)
476 fatal("%s: buffer error: %s", __func__, ssh_err(r));
477 if (allowed && type == MM_USERKEY) {
478 if ((r = sshauthopt_deserialise(m, &opts)) != 0)
479 fatal("%s: sshauthopt_deserialise: %s",
480 __func__, ssh_err(r));
484 if (authoptp != NULL) {
488 sshauthopt_free(opts);
494 * This key verify needs to send the key type along, because the
495 * privileged parent makes the decision if the key is allowed
496 * for authentication.
500 mm_sshkey_verify(const struct sshkey *key, const u_char *sig, size_t siglen,
501 const u_char *data, size_t datalen, const char *sigalg, u_int compat)
504 u_int encoded_ret = 0;
507 debug3("%s entering", __func__);
510 if ((m = sshbuf_new()) == NULL)
511 fatal("%s: sshbuf_new failed", __func__);
512 if ((r = sshkey_puts(key, m)) != 0 ||
513 (r = sshbuf_put_string(m, sig, siglen)) != 0 ||
514 (r = sshbuf_put_string(m, data, datalen)) != 0 ||
515 (r = sshbuf_put_cstring(m, sigalg == NULL ? "" : sigalg)) != 0)
516 fatal("%s: buffer error: %s", __func__, ssh_err(r));
518 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, m);
520 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
521 mm_request_receive_expect(pmonitor->m_recvfd,
522 MONITOR_ANS_KEYVERIFY, m);
524 if ((r = sshbuf_get_u32(m, &encoded_ret)) != 0)
525 fatal("%s: buffer error: %s", __func__, ssh_err(r));
529 if (encoded_ret != 0)
530 return SSH_ERR_SIGNATURE_INVALID;
535 mm_send_keystate(struct monitor *monitor)
537 struct ssh *ssh = active_state; /* XXX */
541 if ((m = sshbuf_new()) == NULL)
542 fatal("%s: sshbuf_new failed", __func__);
543 if ((r = ssh_packet_get_state(ssh, m)) != 0)
544 fatal("%s: get_state failed: %s",
545 __func__, ssh_err(r));
546 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, m);
547 debug3("%s: Finished sending state", __func__);
552 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
556 int success = 0, tmp1 = -1, tmp2 = -1, r;
558 /* Kludge: ensure there are fds free to receive the pty/tty */
559 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
560 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
561 error("%s: cannot allocate fds for pty", __func__);
571 if ((m = sshbuf_new()) == NULL)
572 fatal("%s: sshbuf_new failed", __func__);
573 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, m);
575 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
576 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, m);
578 if ((r = sshbuf_get_u32(m, &success)) != 0)
579 fatal("%s: buffer error: %s", __func__, ssh_err(r));
581 debug3("%s: pty alloc failed", __func__);
585 if ((r = sshbuf_get_cstring(m, &p, NULL)) != 0 ||
586 (r = sshbuf_get_cstring(m, &msg, NULL)) != 0)
587 fatal("%s: buffer error: %s", __func__, ssh_err(r));
590 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
593 if ((r = sshbuf_put(loginmsg, msg, strlen(msg))) != 0)
594 fatal("%s: buffer error: %s", __func__, ssh_err(r));
597 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
598 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
599 fatal("%s: receive fds failed", __func__);
606 mm_session_pty_cleanup2(Session *s)
613 if ((m = sshbuf_new()) == NULL)
614 fatal("%s: sshbuf_new failed", __func__);
615 if ((r = sshbuf_put_cstring(m, s->tty)) != 0)
616 fatal("%s: buffer error: %s", __func__, ssh_err(r));
617 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, m);
620 /* closed dup'ed master */
621 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
622 error("close(s->ptymaster/%d): %s",
623 s->ptymaster, strerror(errno));
625 /* unlink pty from session */
631 mm_start_pam(Authctxt *authctxt)
635 debug3("%s entering", __func__);
636 if (!options.use_pam)
637 fatal("UsePAM=no, but ended up in %s anyway", __func__);
638 if ((m = sshbuf_new()) == NULL)
639 fatal("%s: sshbuf_new failed", __func__);
640 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, m);
646 mm_do_pam_account(void)
654 debug3("%s entering", __func__);
655 if (!options.use_pam)
656 fatal("UsePAM=no, but ended up in %s anyway", __func__);
658 if ((m = sshbuf_new()) == NULL)
659 fatal("%s: sshbuf_new failed", __func__);
660 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, m);
662 mm_request_receive_expect(pmonitor->m_recvfd,
663 MONITOR_ANS_PAM_ACCOUNT, m);
664 if ((r = sshbuf_get_u32(m, &ret)) != 0 ||
665 (r = sshbuf_get_cstring(m, &msg, &msglen)) != 0 ||
666 (r = sshbuf_put(loginmsg, msg, msglen)) != 0)
667 fatal("%s: buffer error: %s", __func__, ssh_err(r));
672 debug3("%s returning %d", __func__, ret);
678 mm_sshpam_init_ctx(Authctxt *authctxt)
683 debug3("%s", __func__);
684 if ((m = sshbuf_new()) == NULL)
685 fatal("%s: sshbuf_new failed", __func__);
686 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, m);
687 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
688 mm_request_receive_expect(pmonitor->m_recvfd,
689 MONITOR_ANS_PAM_INIT_CTX, m);
690 if ((r = sshbuf_get_u32(m, &success)) != 0)
691 fatal("%s: buffer error: %s", __func__, ssh_err(r));
693 debug3("%s: pam_init_ctx failed", __func__);
702 mm_sshpam_query(void *ctx, char **name, char **info,
703 u_int *num, char ***prompts, u_int **echo_on)
709 debug3("%s", __func__);
710 if ((m = sshbuf_new()) == NULL)
711 fatal("%s: sshbuf_new failed", __func__);
712 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, m);
713 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
714 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, m);
715 if ((r = sshbuf_get_u32(m, &ret)) != 0 ||
716 (r = sshbuf_get_cstring(m, name, NULL)) != 0 ||
717 (r = sshbuf_get_cstring(m, info, NULL)) != 0 ||
718 (r = sshbuf_get_u32(m, &n)) != 0 ||
719 (r = sshbuf_get_u32(m, num)) != 0)
720 fatal("%s: buffer error: %s", __func__, ssh_err(r));
721 debug3("%s: pam_query returned %d", __func__, ret);
722 sshpam_set_maxtries_reached(n);
723 if (*num > PAM_MAX_NUM_MSG)
724 fatal("%s: received %u PAM messages, expected <= %u",
725 __func__, *num, PAM_MAX_NUM_MSG);
726 *prompts = xcalloc((*num + 1), sizeof(char *));
727 *echo_on = xcalloc((*num + 1), sizeof(u_int));
728 for (i = 0; i < *num; ++i) {
729 if ((r = sshbuf_get_cstring(m, &((*prompts)[i]), NULL)) != 0 ||
730 (r = sshbuf_get_u32(m, &((*echo_on)[i]))) != 0)
731 fatal("%s: buffer error: %s", __func__, ssh_err(r));
738 mm_sshpam_respond(void *ctx, u_int num, char **resp)
744 debug3("%s", __func__);
745 if ((m = sshbuf_new()) == NULL)
746 fatal("%s: sshbuf_new failed", __func__);
747 if ((r = sshbuf_put_u32(m, num)) != 0)
748 fatal("%s: buffer error: %s", __func__, ssh_err(r));
749 for (i = 0; i < num; ++i) {
750 if ((r = sshbuf_put_cstring(m, resp[i])) != 0)
751 fatal("%s: buffer error: %s", __func__, ssh_err(r));
753 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, m);
754 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
755 mm_request_receive_expect(pmonitor->m_recvfd,
756 MONITOR_ANS_PAM_RESPOND, m);
757 if ((r = sshbuf_get_u32(m, &n)) != 0)
758 fatal("%s: buffer error: %s", __func__, ssh_err(r));
759 ret = (int)n; /* XXX */
760 debug3("%s: pam_respond returned %d", __func__, ret);
766 mm_sshpam_free_ctx(void *ctxtp)
770 debug3("%s", __func__);
771 if ((m = sshbuf_new()) == NULL)
772 fatal("%s: sshbuf_new failed", __func__);
773 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, m);
774 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
775 mm_request_receive_expect(pmonitor->m_recvfd,
776 MONITOR_ANS_PAM_FREE_CTX, m);
781 /* Request process termination */
788 if ((m = sshbuf_new()) == NULL)
789 fatal("%s: sshbuf_new failed", __func__);
790 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, m);
795 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
796 char ***prompts, u_int **echo_on)
799 *infotxt = xstrdup("");
801 *prompts = xcalloc(*numprompts, sizeof(char *));
802 *echo_on = xcalloc(*numprompts, sizeof(u_int));
807 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
808 u_int *numprompts, char ***prompts, u_int **echo_on)
815 debug3("%s: entering", __func__);
817 if ((m = sshbuf_new()) == NULL)
818 fatal("%s: sshbuf_new failed", __func__);
819 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, m);
821 mm_request_receive_expect(pmonitor->m_recvfd,
822 MONITOR_ANS_BSDAUTHQUERY, m);
823 if ((r = sshbuf_get_u32(m, &success)) != 0)
824 fatal("%s: buffer error: %s", __func__, ssh_err(r));
826 debug3("%s: no challenge", __func__);
831 /* Get the challenge, and format the response */
832 if ((r = sshbuf_get_cstring(m, &challenge, NULL)) != 0)
833 fatal("%s: buffer error: %s", __func__, ssh_err(r));
836 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
837 (*prompts)[0] = challenge;
839 debug3("%s: received challenge: %s", __func__, challenge);
845 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
850 debug3("%s: entering", __func__);
851 if (numresponses != 1)
854 if ((m = sshbuf_new()) == NULL)
855 fatal("%s: sshbuf_new failed", __func__);
856 if ((r = sshbuf_put_cstring(m, responses[0])) != 0)
857 fatal("%s: buffer error: %s", __func__, ssh_err(r));
858 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, m);
860 mm_request_receive_expect(pmonitor->m_recvfd,
861 MONITOR_ANS_BSDAUTHRESPOND, m);
863 if ((r = sshbuf_get_u32(m, &authok)) != 0)
864 fatal("%s: buffer error: %s", __func__, ssh_err(r));
867 return ((authok == 0) ? -1 : 0);
870 #ifdef SSH_AUDIT_EVENTS
872 mm_audit_event(ssh_audit_event_t event)
877 debug3("%s entering", __func__);
879 if ((m = sshbuf_new()) == NULL)
880 fatal("%s: sshbuf_new failed", __func__);
881 if ((r = sshbuf_put_u32(m, event)) != 0)
882 fatal("%s: buffer error: %s", __func__, ssh_err(r));
884 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, m);
889 mm_audit_run_command(const char *command)
894 debug3("%s entering command %s", __func__, command);
896 if ((m = sshbuf_new()) == NULL)
897 fatal("%s: sshbuf_new failed", __func__);
898 if ((r = sshbuf_put_cstring(m, command)) != 0)
899 fatal("%s: buffer error: %s", __func__, ssh_err(r));
901 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, m);
904 #endif /* SSH_AUDIT_EVENTS */
908 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
914 /* Client doesn't get to see the context */
917 if ((m = sshbuf_new()) == NULL)
918 fatal("%s: sshbuf_new failed", __func__);
919 if ((r = sshbuf_put_string(m, goid->elements, goid->length)) != 0)
920 fatal("%s: buffer error: %s", __func__, ssh_err(r));
922 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, m);
923 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, m);
925 if ((r = sshbuf_get_u32(m, &major)) != 0)
926 fatal("%s: buffer error: %s", __func__, ssh_err(r));
933 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
934 gss_buffer_desc *out, OM_uint32 *flagsp)
941 if ((m = sshbuf_new()) == NULL)
942 fatal("%s: sshbuf_new failed", __func__);
943 if ((r = sshbuf_put_string(m, in->value, in->length)) != 0)
944 fatal("%s: buffer error: %s", __func__, ssh_err(r));
946 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, m);
947 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, m);
949 if ((r = sshbuf_get_u32(m, &major)) != 0 ||
950 (r = ssh_gssapi_get_buffer_desc(m, out)) != 0)
951 fatal("%s: buffer error: %s", __func__, ssh_err(r));
952 if (flagsp != NULL) {
953 if ((r = sshbuf_get_u32(m, &flags)) != 0)
954 fatal("%s: buffer error: %s", __func__, ssh_err(r));
964 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
970 if ((m = sshbuf_new()) == NULL)
971 fatal("%s: sshbuf_new failed", __func__);
972 if ((r = sshbuf_put_string(m, gssbuf->value, gssbuf->length)) != 0 ||
973 (r = sshbuf_put_string(m, gssmic->value, gssmic->length)) != 0)
974 fatal("%s: buffer error: %s", __func__, ssh_err(r));
976 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, m);
977 mm_request_receive_expect(pmonitor->m_recvfd,
978 MONITOR_ANS_GSSCHECKMIC, m);
980 if ((r = sshbuf_get_u32(m, &major)) != 0)
981 fatal("%s: buffer error: %s", __func__, ssh_err(r));
987 mm_ssh_gssapi_userok(char *user)
990 int r, authenticated = 0;
992 if ((m = sshbuf_new()) == NULL)
993 fatal("%s: sshbuf_new failed", __func__);
995 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, m);
996 mm_request_receive_expect(pmonitor->m_recvfd,
997 MONITOR_ANS_GSSUSEROK, m);
999 if ((r = sshbuf_get_u32(m, &authenticated)) != 0)
1000 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1003 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1004 return (authenticated);