1 /* $OpenBSD: monitor_wrap.c,v 1.123 2021/04/15 16:24:31 markus 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, int forced, 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_f("no log channel");
95 if ((log_msg = sshbuf_new()) == NULL)
96 fatal_f("sshbuf_new failed");
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_u32(log_msg, forced)) != 0 ||
101 (r = sshbuf_put_cstring(log_msg, msg)) != 0)
102 fatal_fr(r, "assemble");
103 if ((len = sshbuf_len(log_msg)) < 4 || len > 0xffffffff)
104 fatal_f("bad length %zu", len);
105 POKE_U32(sshbuf_mutable_ptr(log_msg), len - 4);
106 if (atomicio(vwrite, mon->m_log_sendfd,
107 sshbuf_mutable_ptr(log_msg), len) != len)
108 fatal_f("write: %s", strerror(errno));
109 sshbuf_free(log_msg);
116 * m_pid is only set in the privileged part, and
117 * points to the unprivileged child.
119 return (pmonitor && pmonitor->m_pid > 0);
123 mm_request_send(int sock, enum monitor_reqtype type, struct sshbuf *m)
125 size_t mlen = sshbuf_len(m);
128 debug3_f("entering, type %d", type);
130 if (mlen >= 0xffffffff)
131 fatal_f("bad length %zu", mlen);
132 POKE_U32(buf, mlen + 1);
133 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
134 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
135 fatal_f("write: %s", strerror(errno));
136 if (atomicio(vwrite, sock, sshbuf_mutable_ptr(m), mlen) != mlen)
137 fatal_f("write: %s", strerror(errno));
141 mm_request_receive(int sock, struct sshbuf *m)
143 u_char buf[4], *p = NULL;
147 debug3_f("entering");
149 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
152 fatal_f("read: %s", strerror(errno));
154 msg_len = PEEK_U32(buf);
155 if (msg_len > 256 * 1024)
156 fatal_f("read: bad msg_len %d", msg_len);
158 if ((r = sshbuf_reserve(m, msg_len, &p)) != 0)
159 fatal_fr(r, "reserve");
160 if (atomicio(read, sock, p, msg_len) != msg_len)
161 fatal_f("read: %s", strerror(errno));
165 mm_request_receive_expect(int sock, enum monitor_reqtype type, struct sshbuf *m)
170 debug3_f("entering, type %d", type);
172 mm_request_receive(sock, m);
173 if ((r = sshbuf_get_u8(m, &rtype)) != 0)
174 fatal_fr(r, "parse");
176 fatal_f("read: rtype %d != type %d", rtype, type);
181 mm_choose_dh(int min, int nbits, int max)
188 if ((m = sshbuf_new()) == NULL)
189 fatal_f("sshbuf_new failed");
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_fr(r, "assemble");
195 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, m);
197 debug3_f("waiting for MONITOR_ANS_MODULI");
198 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, m);
200 if ((r = sshbuf_get_u8(m, &success)) != 0)
201 fatal_fr(r, "parse success");
203 fatal_f("MONITOR_ANS_MODULI failed");
205 if ((r = sshbuf_get_bignum2(m, &p)) != 0 ||
206 (r = sshbuf_get_bignum2(m, &g)) != 0)
207 fatal_fr(r, "parse group");
209 debug3_f("remaining %zu", sshbuf_len(m));
212 return (dh_new_group(g, p));
217 mm_sshkey_sign(struct ssh *ssh, struct sshkey *key, u_char **sigp, size_t *lenp,
218 const u_char *data, size_t datalen, const char *hostkey_alg,
219 const char *sk_provider, const char *sk_pin, u_int compat)
221 struct kex *kex = *pmonitor->m_pkex;
223 u_int ndx = kex->host_key_index(key, 0, ssh);
226 debug3_f("entering");
227 if ((m = sshbuf_new()) == NULL)
228 fatal_f("sshbuf_new failed");
229 if ((r = sshbuf_put_u32(m, ndx)) != 0 ||
230 (r = sshbuf_put_string(m, data, datalen)) != 0 ||
231 (r = sshbuf_put_cstring(m, hostkey_alg)) != 0 ||
232 (r = sshbuf_put_u32(m, compat)) != 0)
233 fatal_fr(r, "assemble");
235 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, m);
237 debug3_f("waiting for MONITOR_ANS_SIGN");
238 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, m);
239 if ((r = sshbuf_get_string(m, sigp, lenp)) != 0)
240 fatal_fr(r, "parse");
246 #define GETPW(b, id) \
248 if ((r = sshbuf_get_string_direct(b, &p, &len)) != 0) \
249 fatal_fr(r, "parse pw %s", #id); \
250 if (len != sizeof(pw->id)) \
251 fatal_fr(r, "bad length for %s", #id); \
252 memcpy(&pw->id, p, len); \
256 mm_getpwnamallow(struct ssh *ssh, const char *username)
262 ServerOptions *newopts;
267 debug3_f("entering");
269 if ((m = sshbuf_new()) == NULL)
270 fatal_f("sshbuf_new failed");
271 if ((r = sshbuf_put_cstring(m, username)) != 0)
272 fatal_fr(r, "assemble");
274 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, m);
276 debug3_f("waiting for MONITOR_ANS_PWNAM");
277 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, m);
279 if ((r = sshbuf_get_u8(m, &ok)) != 0)
280 fatal_fr(r, "parse success");
286 /* XXX don't like passing struct passwd like this */
287 pw = xcalloc(sizeof(*pw), 1);
290 #ifdef HAVE_STRUCT_PASSWD_PW_CHANGE
293 #ifdef HAVE_STRUCT_PASSWD_PW_EXPIRE
296 if ((r = sshbuf_get_cstring(m, &pw->pw_name, NULL)) != 0 ||
297 (r = sshbuf_get_cstring(m, &pw->pw_passwd, NULL)) != 0 ||
298 #ifdef HAVE_STRUCT_PASSWD_PW_GECOS
299 (r = sshbuf_get_cstring(m, &pw->pw_gecos, NULL)) != 0 ||
301 #ifdef HAVE_STRUCT_PASSWD_PW_CLASS
302 (r = sshbuf_get_cstring(m, &pw->pw_class, NULL)) != 0 ||
304 (r = sshbuf_get_cstring(m, &pw->pw_dir, NULL)) != 0 ||
305 (r = sshbuf_get_cstring(m, &pw->pw_shell, NULL)) != 0)
306 fatal_fr(r, "parse pw");
309 /* copy options block as a Match directive may have changed some */
310 if ((r = sshbuf_get_string_direct(m, &p, &len)) != 0)
311 fatal_fr(r, "parse opts");
312 if (len != sizeof(*newopts))
313 fatal_f("option block size mismatch");
314 newopts = xcalloc(sizeof(*newopts), 1);
315 memcpy(newopts, p, sizeof(*newopts));
317 #define M_CP_STROPT(x) do { \
318 if (newopts->x != NULL && \
319 (r = sshbuf_get_cstring(m, &newopts->x, NULL)) != 0) \
320 fatal_fr(r, "parse %s", #x); \
322 #define M_CP_STRARRAYOPT(x, nx) do { \
323 newopts->x = newopts->nx == 0 ? \
324 NULL : xcalloc(newopts->nx, sizeof(*newopts->x)); \
325 for (i = 0; i < newopts->nx; i++) { \
326 if ((r = sshbuf_get_cstring(m, \
327 &newopts->x[i], NULL)) != 0) \
328 fatal_fr(r, "parse %s", #x); \
331 /* See comment in servconf.h */
332 COPY_MATCH_STRING_OPTS();
334 #undef M_CP_STRARRAYOPT
336 copy_set_server_options(&options, newopts, 1);
337 log_change_level(options.log_level);
339 for (i = 0; i < options.num_log_verbose; i++)
340 log_verbose_add(options.log_verbose[i]);
341 process_permitopen(ssh, &options);
350 mm_auth2_read_banner(void)
356 debug3_f("entering");
358 if ((m = sshbuf_new()) == NULL)
359 fatal_f("sshbuf_new failed");
360 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, m);
363 mm_request_receive_expect(pmonitor->m_recvfd,
364 MONITOR_ANS_AUTH2_READ_BANNER, m);
365 if ((r = sshbuf_get_cstring(m, &banner, NULL)) != 0)
366 fatal_fr(r, "parse");
369 /* treat empty banner as missing banner */
370 if (strlen(banner) == 0) {
377 /* Inform the privileged process about service and style */
380 mm_inform_authserv(char *service, char *style)
385 debug3_f("entering");
387 if ((m = sshbuf_new()) == NULL)
388 fatal_f("sshbuf_new failed");
389 if ((r = sshbuf_put_cstring(m, service)) != 0 ||
390 (r = sshbuf_put_cstring(m, style ? style : "")) != 0)
391 fatal_fr(r, "assemble");
393 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, m);
398 /* Do the password authentication */
400 mm_auth_password(struct ssh *ssh, char *password)
403 int r, authenticated = 0;
408 debug3_f("entering");
410 if ((m = sshbuf_new()) == NULL)
411 fatal_f("sshbuf_new failed");
412 if ((r = sshbuf_put_cstring(m, password)) != 0)
413 fatal_fr(r, "assemble");
414 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, m);
416 debug3_f("waiting for MONITOR_ANS_AUTHPASSWORD");
417 mm_request_receive_expect(pmonitor->m_recvfd,
418 MONITOR_ANS_AUTHPASSWORD, m);
420 if ((r = sshbuf_get_u32(m, &authenticated)) != 0)
421 fatal_fr(r, "parse");
423 if ((r = sshbuf_get_u32(m, &maxtries)) != 0)
424 fatal_fr(r, "parse PAM");
425 if (maxtries > INT_MAX)
426 fatal_fr(r, "bad maxtries");
427 sshpam_set_maxtries_reached(maxtries);
432 debug3_f("user %sauthenticated", authenticated ? "" : "not ");
433 return (authenticated);
437 mm_user_key_allowed(struct ssh *ssh, struct passwd *pw, struct sshkey *key,
438 int pubkey_auth_attempt, struct sshauthopt **authoptp)
440 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key,
441 pubkey_auth_attempt, authoptp));
445 mm_hostbased_key_allowed(struct ssh *ssh, struct passwd *pw,
446 const char *user, const char *host, struct sshkey *key)
448 return (mm_key_allowed(MM_HOSTKEY, user, host, key, 0, NULL));
452 mm_key_allowed(enum mm_keytype type, const char *user, const char *host,
453 struct sshkey *key, int pubkey_auth_attempt, struct sshauthopt **authoptp)
457 struct sshauthopt *opts = NULL;
459 debug3_f("entering");
461 if (authoptp != NULL)
464 if ((m = sshbuf_new()) == NULL)
465 fatal_f("sshbuf_new failed");
466 if ((r = sshbuf_put_u32(m, type)) != 0 ||
467 (r = sshbuf_put_cstring(m, user ? user : "")) != 0 ||
468 (r = sshbuf_put_cstring(m, host ? host : "")) != 0 ||
469 (r = sshkey_puts(key, m)) != 0 ||
470 (r = sshbuf_put_u32(m, pubkey_auth_attempt)) != 0)
471 fatal_fr(r, "assemble");
473 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, m);
475 debug3_f("waiting for MONITOR_ANS_KEYALLOWED");
476 mm_request_receive_expect(pmonitor->m_recvfd,
477 MONITOR_ANS_KEYALLOWED, m);
479 if ((r = sshbuf_get_u32(m, &allowed)) != 0)
480 fatal_fr(r, "parse");
481 if (allowed && type == MM_USERKEY &&
482 (r = sshauthopt_deserialise(m, &opts)) != 0)
483 fatal_fr(r, "sshauthopt_deserialise");
486 if (authoptp != NULL) {
490 sshauthopt_free(opts);
496 * This key verify needs to send the key type along, because the
497 * privileged parent makes the decision if the key is allowed
498 * for authentication.
502 mm_sshkey_verify(const struct sshkey *key, const u_char *sig, size_t siglen,
503 const u_char *data, size_t datalen, const char *sigalg, u_int compat,
504 struct sshkey_sig_details **sig_detailsp)
507 u_int encoded_ret = 0;
509 u_char sig_details_present, flags;
512 debug3_f("entering");
514 if (sig_detailsp != NULL)
515 *sig_detailsp = NULL;
516 if ((m = sshbuf_new()) == NULL)
517 fatal_f("sshbuf_new failed");
518 if ((r = sshkey_puts(key, m)) != 0 ||
519 (r = sshbuf_put_string(m, sig, siglen)) != 0 ||
520 (r = sshbuf_put_string(m, data, datalen)) != 0 ||
521 (r = sshbuf_put_cstring(m, sigalg == NULL ? "" : sigalg)) != 0)
522 fatal_fr(r, "assemble");
524 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, m);
526 debug3_f("waiting for MONITOR_ANS_KEYVERIFY");
527 mm_request_receive_expect(pmonitor->m_recvfd,
528 MONITOR_ANS_KEYVERIFY, m);
530 if ((r = sshbuf_get_u32(m, &encoded_ret)) != 0 ||
531 (r = sshbuf_get_u8(m, &sig_details_present)) != 0)
532 fatal_fr(r, "parse");
533 if (sig_details_present && encoded_ret == 0) {
534 if ((r = sshbuf_get_u32(m, &counter)) != 0 ||
535 (r = sshbuf_get_u8(m, &flags)) != 0)
536 fatal_fr(r, "parse sig_details");
537 if (sig_detailsp != NULL) {
538 *sig_detailsp = xcalloc(1, sizeof(**sig_detailsp));
539 (*sig_detailsp)->sk_counter = counter;
540 (*sig_detailsp)->sk_flags = flags;
546 if (encoded_ret != 0)
547 return SSH_ERR_SIGNATURE_INVALID;
552 mm_send_keystate(struct ssh *ssh, struct monitor *monitor)
557 if ((m = sshbuf_new()) == NULL)
558 fatal_f("sshbuf_new failed");
559 if ((r = ssh_packet_get_state(ssh, m)) != 0)
560 fatal_fr(r, "ssh_packet_get_state");
561 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, m);
562 debug3_f("Finished sending state");
567 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
571 int success = 0, tmp1 = -1, tmp2 = -1, r;
573 /* Kludge: ensure there are fds free to receive the pty/tty */
574 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
575 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
576 error_f("cannot allocate fds for pty");
586 if ((m = sshbuf_new()) == NULL)
587 fatal_f("sshbuf_new failed");
588 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, m);
590 debug3_f("waiting for MONITOR_ANS_PTY");
591 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, m);
593 if ((r = sshbuf_get_u32(m, &success)) != 0)
594 fatal_fr(r, "parse success");
596 debug3_f("pty alloc failed");
600 if ((r = sshbuf_get_cstring(m, &p, NULL)) != 0 ||
601 (r = sshbuf_get_cstring(m, &msg, NULL)) != 0)
602 fatal_fr(r, "parse");
605 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
608 if ((r = sshbuf_put(loginmsg, msg, strlen(msg))) != 0)
609 fatal_fr(r, "put loginmsg");
612 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
613 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
614 fatal_f("receive fds failed");
621 mm_session_pty_cleanup2(Session *s)
628 if ((m = sshbuf_new()) == NULL)
629 fatal_f("sshbuf_new failed");
630 if ((r = sshbuf_put_cstring(m, s->tty)) != 0)
631 fatal_fr(r, "assmble");
632 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, m);
635 /* closed dup'ed master */
636 if (s->ptymaster != -1 && close(s->ptymaster) == -1)
637 error("close(s->ptymaster/%d): %s",
638 s->ptymaster, strerror(errno));
640 /* unlink pty from session */
646 mm_start_pam(struct ssh *ssh)
650 debug3("%s entering", __func__);
651 if (!options.use_pam)
652 fatal("UsePAM=no, but ended up in %s anyway", __func__);
653 if ((m = sshbuf_new()) == NULL)
654 fatal("%s: sshbuf_new failed", __func__);
655 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, m);
661 mm_do_pam_account(void)
669 debug3("%s entering", __func__);
670 if (!options.use_pam)
671 fatal("UsePAM=no, but ended up in %s anyway", __func__);
673 if ((m = sshbuf_new()) == NULL)
674 fatal("%s: sshbuf_new failed", __func__);
675 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, m);
677 mm_request_receive_expect(pmonitor->m_recvfd,
678 MONITOR_ANS_PAM_ACCOUNT, m);
679 if ((r = sshbuf_get_u32(m, &ret)) != 0 ||
680 (r = sshbuf_get_cstring(m, &msg, &msglen)) != 0 ||
681 (r = sshbuf_put(loginmsg, msg, msglen)) != 0)
682 fatal("%s: buffer error: %s", __func__, ssh_err(r));
687 debug3("%s returning %d", __func__, ret);
693 mm_sshpam_init_ctx(Authctxt *authctxt)
698 debug3("%s", __func__);
699 if ((m = sshbuf_new()) == NULL)
700 fatal("%s: sshbuf_new failed", __func__);
701 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, m);
702 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
703 mm_request_receive_expect(pmonitor->m_recvfd,
704 MONITOR_ANS_PAM_INIT_CTX, m);
705 if ((r = sshbuf_get_u32(m, &success)) != 0)
706 fatal("%s: buffer error: %s", __func__, ssh_err(r));
708 debug3("%s: pam_init_ctx failed", __func__);
717 mm_sshpam_query(void *ctx, char **name, char **info,
718 u_int *num, char ***prompts, u_int **echo_on)
724 debug3("%s", __func__);
725 if ((m = sshbuf_new()) == NULL)
726 fatal("%s: sshbuf_new failed", __func__);
727 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, m);
728 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
729 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, m);
730 if ((r = sshbuf_get_u32(m, &ret)) != 0 ||
731 (r = sshbuf_get_cstring(m, name, NULL)) != 0 ||
732 (r = sshbuf_get_cstring(m, info, NULL)) != 0 ||
733 (r = sshbuf_get_u32(m, &n)) != 0 ||
734 (r = sshbuf_get_u32(m, num)) != 0)
735 fatal("%s: buffer error: %s", __func__, ssh_err(r));
736 debug3("%s: pam_query returned %d", __func__, ret);
737 sshpam_set_maxtries_reached(n);
738 if (*num > PAM_MAX_NUM_MSG)
739 fatal("%s: received %u PAM messages, expected <= %u",
740 __func__, *num, PAM_MAX_NUM_MSG);
741 *prompts = xcalloc((*num + 1), sizeof(char *));
742 *echo_on = xcalloc((*num + 1), sizeof(u_int));
743 for (i = 0; i < *num; ++i) {
744 if ((r = sshbuf_get_cstring(m, &((*prompts)[i]), NULL)) != 0 ||
745 (r = sshbuf_get_u32(m, &((*echo_on)[i]))) != 0)
746 fatal("%s: buffer error: %s", __func__, ssh_err(r));
753 mm_sshpam_respond(void *ctx, u_int num, char **resp)
759 debug3("%s", __func__);
760 if ((m = sshbuf_new()) == NULL)
761 fatal("%s: sshbuf_new failed", __func__);
762 if ((r = sshbuf_put_u32(m, num)) != 0)
763 fatal("%s: buffer error: %s", __func__, ssh_err(r));
764 for (i = 0; i < num; ++i) {
765 if ((r = sshbuf_put_cstring(m, resp[i])) != 0)
766 fatal("%s: buffer error: %s", __func__, ssh_err(r));
768 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, m);
769 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
770 mm_request_receive_expect(pmonitor->m_recvfd,
771 MONITOR_ANS_PAM_RESPOND, m);
772 if ((r = sshbuf_get_u32(m, &n)) != 0)
773 fatal("%s: buffer error: %s", __func__, ssh_err(r));
774 ret = (int)n; /* XXX */
775 debug3("%s: pam_respond returned %d", __func__, ret);
781 mm_sshpam_free_ctx(void *ctxtp)
785 debug3("%s", __func__);
786 if ((m = sshbuf_new()) == NULL)
787 fatal("%s: sshbuf_new failed", __func__);
788 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, m);
789 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
790 mm_request_receive_expect(pmonitor->m_recvfd,
791 MONITOR_ANS_PAM_FREE_CTX, m);
796 /* Request process termination */
803 if ((m = sshbuf_new()) == NULL)
804 fatal_f("sshbuf_new failed");
805 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, m);
810 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
811 char ***prompts, u_int **echo_on)
814 *infotxt = xstrdup("");
816 *prompts = xcalloc(*numprompts, sizeof(char *));
817 *echo_on = xcalloc(*numprompts, sizeof(u_int));
822 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
823 u_int *numprompts, char ***prompts, u_int **echo_on)
830 debug3_f("entering");
832 if ((m = sshbuf_new()) == NULL)
833 fatal_f("sshbuf_new failed");
834 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, m);
836 mm_request_receive_expect(pmonitor->m_recvfd,
837 MONITOR_ANS_BSDAUTHQUERY, m);
838 if ((r = sshbuf_get_u32(m, &success)) != 0)
839 fatal_fr(r, "parse success");
841 debug3_f("no challenge");
846 /* Get the challenge, and format the response */
847 if ((r = sshbuf_get_cstring(m, &challenge, NULL)) != 0)
848 fatal_fr(r, "parse challenge");
851 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
852 (*prompts)[0] = challenge;
854 debug3_f("received challenge: %s", challenge);
860 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
865 debug3_f("entering");
866 if (numresponses != 1)
869 if ((m = sshbuf_new()) == NULL)
870 fatal_f("sshbuf_new failed");
871 if ((r = sshbuf_put_cstring(m, responses[0])) != 0)
872 fatal_fr(r, "assemble");
873 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, m);
875 mm_request_receive_expect(pmonitor->m_recvfd,
876 MONITOR_ANS_BSDAUTHRESPOND, m);
878 if ((r = sshbuf_get_u32(m, &authok)) != 0)
879 fatal_fr(r, "parse");
882 return ((authok == 0) ? -1 : 0);
885 #ifdef SSH_AUDIT_EVENTS
887 mm_audit_event(struct ssh *ssh, ssh_audit_event_t event)
892 debug3("%s entering", __func__);
894 if ((m = sshbuf_new()) == NULL)
895 fatal("%s: sshbuf_new failed", __func__);
896 if ((r = sshbuf_put_u32(m, event)) != 0)
897 fatal("%s: buffer error: %s", __func__, ssh_err(r));
899 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, m);
904 mm_audit_run_command(const char *command)
909 debug3("%s entering command %s", __func__, command);
911 if ((m = sshbuf_new()) == NULL)
912 fatal("%s: sshbuf_new failed", __func__);
913 if ((r = sshbuf_put_cstring(m, command)) != 0)
914 fatal("%s: buffer error: %s", __func__, ssh_err(r));
916 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, m);
919 #endif /* SSH_AUDIT_EVENTS */
923 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
929 /* Client doesn't get to see the context */
932 if ((m = sshbuf_new()) == NULL)
933 fatal_f("sshbuf_new failed");
934 if ((r = sshbuf_put_string(m, goid->elements, goid->length)) != 0)
935 fatal_fr(r, "assemble");
937 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, m);
938 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, m);
940 if ((r = sshbuf_get_u32(m, &major)) != 0)
941 fatal_fr(r, "parse");
948 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
949 gss_buffer_desc *out, OM_uint32 *flagsp)
956 if ((m = sshbuf_new()) == NULL)
957 fatal_f("sshbuf_new failed");
958 if ((r = sshbuf_put_string(m, in->value, in->length)) != 0)
959 fatal_fr(r, "assemble");
961 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, m);
962 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, m);
964 if ((r = sshbuf_get_u32(m, &major)) != 0 ||
965 (r = ssh_gssapi_get_buffer_desc(m, out)) != 0)
966 fatal_fr(r, "parse");
967 if (flagsp != NULL) {
968 if ((r = sshbuf_get_u32(m, &flags)) != 0)
969 fatal_fr(r, "parse flags");
979 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
985 if ((m = sshbuf_new()) == NULL)
986 fatal_f("sshbuf_new failed");
987 if ((r = sshbuf_put_string(m, gssbuf->value, gssbuf->length)) != 0 ||
988 (r = sshbuf_put_string(m, gssmic->value, gssmic->length)) != 0)
989 fatal_fr(r, "assemble");
991 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, m);
992 mm_request_receive_expect(pmonitor->m_recvfd,
993 MONITOR_ANS_GSSCHECKMIC, m);
995 if ((r = sshbuf_get_u32(m, &major)) != 0)
996 fatal_fr(r, "parse");
1002 mm_ssh_gssapi_userok(char *user)
1005 int r, authenticated = 0;
1007 if ((m = sshbuf_new()) == NULL)
1008 fatal_f("sshbuf_new failed");
1010 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, m);
1011 mm_request_receive_expect(pmonitor->m_recvfd,
1012 MONITOR_ANS_GSSUSEROK, m);
1014 if ((r = sshbuf_get_u32(m, &authenticated)) != 0)
1015 fatal_fr(r, "parse");
1018 debug3_f("user %sauthenticated", authenticated ? "" : "not ");
1019 return (authenticated);