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_login_getpwclass(const struct passwd *pwent)
258 debug3("%s entering", __func__);
260 if ((m = sshbuf_new()) == NULL)
261 fatal("%s: sshbuf_new failed", __func__);
262 if ((r = sshbuf_put_passwd(m, pwent)) != 0)
263 fatal("%s: buffer error: %s", __func__, ssh_err(r));
265 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GETPWCLASS, m);
267 debug3("%s: waiting for MONITOR_ANS_GETPWCLASS", __func__);
268 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GETPWCLASS, m);
270 if ((r = sshbuf_get_u8(m, &rc)) != 0)
271 fatal("%s: buffer error: %s", __func__, ssh_err(r));
278 lc = xmalloc(sizeof(*lc));
279 if ((r = sshbuf_get_cstring(m, &lc->lc_class, NULL)) != 0 ||
280 (r = sshbuf_get_cstring(m, &lc->lc_cap, NULL)) != 0 ||
281 (r = sshbuf_get_cstring(m, &lc->lc_style, NULL)) != 0)
282 fatal("%s: buffer error: %s", __func__, ssh_err(r));
291 mm_login_close(login_cap_t *lc)
302 mm_getpwnamallow(const char *username)
304 struct ssh *ssh = active_state; /* XXX */
309 ServerOptions *newopts;
314 debug3("%s entering", __func__);
316 if ((m = sshbuf_new()) == NULL)
317 fatal("%s: sshbuf_new failed", __func__);
318 if ((r = sshbuf_put_cstring(m, username)) != 0)
319 fatal("%s: buffer error: %s", __func__, ssh_err(r));
321 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, m);
323 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
324 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, m);
326 if ((r = sshbuf_get_u8(m, &ok)) != 0)
327 fatal("%s: buffer error: %s", __func__, ssh_err(r));
333 pw = sshbuf_get_passwd(m);
335 fatal("%s: receive get struct passwd failed", __func__);
338 /* copy options block as a Match directive may have changed some */
339 if ((r = sshbuf_get_string_direct(m, &p, &len)) != 0)
340 fatal("%s: buffer error: %s", __func__, ssh_err(r));
341 if (len != sizeof(*newopts))
342 fatal("%s: option block size mismatch", __func__);
343 newopts = xcalloc(sizeof(*newopts), 1);
344 memcpy(newopts, p, sizeof(*newopts));
346 #define M_CP_STROPT(x) do { \
347 if (newopts->x != NULL) { \
348 if ((r = sshbuf_get_cstring(m, \
349 &newopts->x, NULL)) != 0) \
350 fatal("%s: buffer error: %s", \
351 __func__, ssh_err(r)); \
354 #define M_CP_STRARRAYOPT(x, nx) do { \
355 newopts->x = newopts->nx == 0 ? \
356 NULL : xcalloc(newopts->nx, sizeof(*newopts->x)); \
357 for (i = 0; i < newopts->nx; i++) { \
358 if ((r = sshbuf_get_cstring(m, \
359 &newopts->x[i], NULL)) != 0) \
360 fatal("%s: buffer error: %s", \
361 __func__, ssh_err(r)); \
364 /* See comment in servconf.h */
365 COPY_MATCH_STRING_OPTS();
367 #undef M_CP_STRARRAYOPT
369 copy_set_server_options(&options, newopts, 1);
370 log_change_level(options.log_level);
371 process_permitopen(ssh, &options);
380 mm_auth2_read_banner(void)
386 debug3("%s entering", __func__);
388 if ((m = sshbuf_new()) == NULL)
389 fatal("%s: sshbuf_new failed", __func__);
390 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, m);
393 mm_request_receive_expect(pmonitor->m_recvfd,
394 MONITOR_ANS_AUTH2_READ_BANNER, m);
395 if ((r = sshbuf_get_cstring(m, &banner, NULL)) != 0)
396 fatal("%s: buffer error: %s", __func__, ssh_err(r));
399 /* treat empty banner as missing banner */
400 if (strlen(banner) == 0) {
407 /* Inform the privileged process about service and style */
410 mm_inform_authserv(char *service, char *style)
415 debug3("%s entering", __func__);
417 if ((m = sshbuf_new()) == NULL)
418 fatal("%s: sshbuf_new failed", __func__);
419 if ((r = sshbuf_put_cstring(m, service)) != 0 ||
420 (r = sshbuf_put_cstring(m, style ? style : "")) != 0)
421 fatal("%s: buffer error: %s", __func__, ssh_err(r));
423 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, m);
428 /* Do the password authentication */
430 mm_auth_password(struct ssh *ssh, char *password)
433 int r, authenticated = 0;
438 debug3("%s entering", __func__);
440 if ((m = sshbuf_new()) == NULL)
441 fatal("%s: sshbuf_new failed", __func__);
442 if ((r = sshbuf_put_cstring(m, password)) != 0)
443 fatal("%s: buffer error: %s", __func__, ssh_err(r));
444 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, m);
446 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
447 mm_request_receive_expect(pmonitor->m_recvfd,
448 MONITOR_ANS_AUTHPASSWORD, m);
450 if ((r = sshbuf_get_u32(m, &authenticated)) != 0)
451 fatal("%s: buffer error: %s", __func__, ssh_err(r));
453 if ((r = sshbuf_get_u32(m, &maxtries)) != 0)
454 fatal("%s: buffer error: %s", __func__, ssh_err(r));
455 if (maxtries > INT_MAX)
456 fatal("%s: bad maxtries %u", __func__, maxtries);
457 sshpam_set_maxtries_reached(maxtries);
462 debug3("%s: user %sauthenticated",
463 __func__, authenticated ? "" : "not ");
464 return (authenticated);
468 mm_user_key_allowed(struct ssh *ssh, struct passwd *pw, struct sshkey *key,
469 int pubkey_auth_attempt, struct sshauthopt **authoptp)
471 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key,
472 pubkey_auth_attempt, authoptp));
476 mm_hostbased_key_allowed(struct passwd *pw, const char *user, const char *host,
479 return (mm_key_allowed(MM_HOSTKEY, user, host, key, 0, NULL));
483 mm_key_allowed(enum mm_keytype type, const char *user, const char *host,
484 struct sshkey *key, int pubkey_auth_attempt, struct sshauthopt **authoptp)
488 struct sshauthopt *opts = NULL;
490 debug3("%s entering", __func__);
492 if (authoptp != NULL)
495 if ((m = sshbuf_new()) == NULL)
496 fatal("%s: sshbuf_new failed", __func__);
497 if ((r = sshbuf_put_u32(m, type)) != 0 ||
498 (r = sshbuf_put_cstring(m, user ? user : "")) != 0 ||
499 (r = sshbuf_put_cstring(m, host ? host : "")) != 0 ||
500 (r = sshkey_puts(key, m)) != 0 ||
501 (r = sshbuf_put_u32(m, pubkey_auth_attempt)) != 0)
502 fatal("%s: buffer error: %s", __func__, ssh_err(r));
504 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, m);
506 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
507 mm_request_receive_expect(pmonitor->m_recvfd,
508 MONITOR_ANS_KEYALLOWED, m);
510 if ((r = sshbuf_get_u32(m, &allowed)) != 0)
511 fatal("%s: buffer error: %s", __func__, ssh_err(r));
512 if (allowed && type == MM_USERKEY) {
513 if ((r = sshauthopt_deserialise(m, &opts)) != 0)
514 fatal("%s: sshauthopt_deserialise: %s",
515 __func__, ssh_err(r));
519 if (authoptp != NULL) {
523 sshauthopt_free(opts);
529 * This key verify needs to send the key type along, because the
530 * privileged parent makes the decision if the key is allowed
531 * for authentication.
535 mm_sshkey_verify(const struct sshkey *key, const u_char *sig, size_t siglen,
536 const u_char *data, size_t datalen, const char *sigalg, u_int compat)
539 u_int encoded_ret = 0;
542 debug3("%s entering", __func__);
545 if ((m = sshbuf_new()) == NULL)
546 fatal("%s: sshbuf_new failed", __func__);
547 if ((r = sshkey_puts(key, m)) != 0 ||
548 (r = sshbuf_put_string(m, sig, siglen)) != 0 ||
549 (r = sshbuf_put_string(m, data, datalen)) != 0 ||
550 (r = sshbuf_put_cstring(m, sigalg == NULL ? "" : sigalg)) != 0)
551 fatal("%s: buffer error: %s", __func__, ssh_err(r));
553 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, m);
555 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
556 mm_request_receive_expect(pmonitor->m_recvfd,
557 MONITOR_ANS_KEYVERIFY, m);
559 if ((r = sshbuf_get_u32(m, &encoded_ret)) != 0)
560 fatal("%s: buffer error: %s", __func__, ssh_err(r));
564 if (encoded_ret != 0)
565 return SSH_ERR_SIGNATURE_INVALID;
570 mm_send_keystate(struct monitor *monitor)
572 struct ssh *ssh = active_state; /* XXX */
576 if ((m = sshbuf_new()) == NULL)
577 fatal("%s: sshbuf_new failed", __func__);
578 if ((r = ssh_packet_get_state(ssh, m)) != 0)
579 fatal("%s: get_state failed: %s",
580 __func__, ssh_err(r));
581 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, m);
582 debug3("%s: Finished sending state", __func__);
587 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
591 int success = 0, tmp1 = -1, tmp2 = -1, r;
593 /* Kludge: ensure there are fds free to receive the pty/tty */
594 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
595 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
596 error("%s: cannot allocate fds for pty", __func__);
606 if ((m = sshbuf_new()) == NULL)
607 fatal("%s: sshbuf_new failed", __func__);
608 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, m);
610 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
611 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, m);
613 if ((r = sshbuf_get_u32(m, &success)) != 0)
614 fatal("%s: buffer error: %s", __func__, ssh_err(r));
616 debug3("%s: pty alloc failed", __func__);
620 if ((r = sshbuf_get_cstring(m, &p, NULL)) != 0 ||
621 (r = sshbuf_get_cstring(m, &msg, NULL)) != 0)
622 fatal("%s: buffer error: %s", __func__, ssh_err(r));
625 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
628 if ((r = sshbuf_put(loginmsg, msg, strlen(msg))) != 0)
629 fatal("%s: buffer error: %s", __func__, ssh_err(r));
632 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
633 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
634 fatal("%s: receive fds failed", __func__);
641 mm_session_pty_cleanup2(Session *s)
648 if ((m = sshbuf_new()) == NULL)
649 fatal("%s: sshbuf_new failed", __func__);
650 if ((r = sshbuf_put_cstring(m, s->tty)) != 0)
651 fatal("%s: buffer error: %s", __func__, ssh_err(r));
652 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, m);
655 /* closed dup'ed master */
656 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
657 error("close(s->ptymaster/%d): %s",
658 s->ptymaster, strerror(errno));
660 /* unlink pty from session */
666 mm_start_pam(Authctxt *authctxt)
670 debug3("%s entering", __func__);
671 if (!options.use_pam)
672 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_START, m);
681 mm_do_pam_account(void)
689 debug3("%s entering", __func__);
690 if (!options.use_pam)
691 fatal("UsePAM=no, but ended up in %s anyway", __func__);
693 if ((m = sshbuf_new()) == NULL)
694 fatal("%s: sshbuf_new failed", __func__);
695 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, m);
697 mm_request_receive_expect(pmonitor->m_recvfd,
698 MONITOR_ANS_PAM_ACCOUNT, m);
699 if ((r = sshbuf_get_u32(m, &ret)) != 0 ||
700 (r = sshbuf_get_cstring(m, &msg, &msglen)) != 0 ||
701 (r = sshbuf_put(loginmsg, msg, msglen)) != 0)
702 fatal("%s: buffer error: %s", __func__, ssh_err(r));
707 debug3("%s returning %d", __func__, ret);
713 mm_sshpam_init_ctx(Authctxt *authctxt)
718 debug3("%s", __func__);
719 if ((m = sshbuf_new()) == NULL)
720 fatal("%s: sshbuf_new failed", __func__);
721 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, m);
722 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
723 mm_request_receive_expect(pmonitor->m_recvfd,
724 MONITOR_ANS_PAM_INIT_CTX, m);
725 if ((r = sshbuf_get_u32(m, &success)) != 0)
726 fatal("%s: buffer error: %s", __func__, ssh_err(r));
728 debug3("%s: pam_init_ctx failed", __func__);
737 mm_sshpam_query(void *ctx, char **name, char **info,
738 u_int *num, char ***prompts, u_int **echo_on)
744 debug3("%s", __func__);
745 if ((m = sshbuf_new()) == NULL)
746 fatal("%s: sshbuf_new failed", __func__);
747 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, m);
748 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
749 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, m);
750 if ((r = sshbuf_get_u32(m, &ret)) != 0 ||
751 (r = sshbuf_get_cstring(m, name, NULL)) != 0 ||
752 (r = sshbuf_get_cstring(m, info, NULL)) != 0 ||
753 (r = sshbuf_get_u32(m, &n)) != 0 ||
754 (r = sshbuf_get_u32(m, num)) != 0)
755 fatal("%s: buffer error: %s", __func__, ssh_err(r));
756 debug3("%s: pam_query returned %d", __func__, ret);
757 sshpam_set_maxtries_reached(n);
758 if (*num > PAM_MAX_NUM_MSG)
759 fatal("%s: received %u PAM messages, expected <= %u",
760 __func__, *num, PAM_MAX_NUM_MSG);
761 *prompts = xcalloc((*num + 1), sizeof(char *));
762 *echo_on = xcalloc((*num + 1), sizeof(u_int));
763 for (i = 0; i < *num; ++i) {
764 if ((r = sshbuf_get_cstring(m, &((*prompts)[i]), NULL)) != 0 ||
765 (r = sshbuf_get_u32(m, &((*echo_on)[i]))) != 0)
766 fatal("%s: buffer error: %s", __func__, ssh_err(r));
773 mm_sshpam_respond(void *ctx, u_int num, char **resp)
779 debug3("%s", __func__);
780 if ((m = sshbuf_new()) == NULL)
781 fatal("%s: sshbuf_new failed", __func__);
782 if ((r = sshbuf_put_u32(m, num)) != 0)
783 fatal("%s: buffer error: %s", __func__, ssh_err(r));
784 for (i = 0; i < num; ++i) {
785 if ((r = sshbuf_put_cstring(m, resp[i])) != 0)
786 fatal("%s: buffer error: %s", __func__, ssh_err(r));
788 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, m);
789 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
790 mm_request_receive_expect(pmonitor->m_recvfd,
791 MONITOR_ANS_PAM_RESPOND, m);
792 if ((r = sshbuf_get_u32(m, &n)) != 0)
793 fatal("%s: buffer error: %s", __func__, ssh_err(r));
794 ret = (int)n; /* XXX */
795 debug3("%s: pam_respond returned %d", __func__, ret);
801 mm_sshpam_free_ctx(void *ctxtp)
805 debug3("%s", __func__);
806 if ((m = sshbuf_new()) == NULL)
807 fatal("%s: sshbuf_new failed", __func__);
808 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, m);
809 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
810 mm_request_receive_expect(pmonitor->m_recvfd,
811 MONITOR_ANS_PAM_FREE_CTX, m);
816 /* Request process termination */
823 if ((m = sshbuf_new()) == NULL)
824 fatal("%s: sshbuf_new failed", __func__);
825 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, m);
830 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
831 char ***prompts, u_int **echo_on)
834 *infotxt = xstrdup("");
836 *prompts = xcalloc(*numprompts, sizeof(char *));
837 *echo_on = xcalloc(*numprompts, sizeof(u_int));
842 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
843 u_int *numprompts, char ***prompts, u_int **echo_on)
850 debug3("%s: entering", __func__);
852 if ((m = sshbuf_new()) == NULL)
853 fatal("%s: sshbuf_new failed", __func__);
854 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, m);
856 mm_request_receive_expect(pmonitor->m_recvfd,
857 MONITOR_ANS_BSDAUTHQUERY, m);
858 if ((r = sshbuf_get_u32(m, &success)) != 0)
859 fatal("%s: buffer error: %s", __func__, ssh_err(r));
861 debug3("%s: no challenge", __func__);
866 /* Get the challenge, and format the response */
867 if ((r = sshbuf_get_cstring(m, &challenge, NULL)) != 0)
868 fatal("%s: buffer error: %s", __func__, ssh_err(r));
871 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
872 (*prompts)[0] = challenge;
874 debug3("%s: received challenge: %s", __func__, challenge);
880 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
885 debug3("%s: entering", __func__);
886 if (numresponses != 1)
889 if ((m = sshbuf_new()) == NULL)
890 fatal("%s: sshbuf_new failed", __func__);
891 if ((r = sshbuf_put_cstring(m, responses[0])) != 0)
892 fatal("%s: buffer error: %s", __func__, ssh_err(r));
893 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, m);
895 mm_request_receive_expect(pmonitor->m_recvfd,
896 MONITOR_ANS_BSDAUTHRESPOND, m);
898 if ((r = sshbuf_get_u32(m, &authok)) != 0)
899 fatal("%s: buffer error: %s", __func__, ssh_err(r));
902 return ((authok == 0) ? -1 : 0);
905 #ifdef SSH_AUDIT_EVENTS
907 mm_audit_event(ssh_audit_event_t event)
912 debug3("%s entering", __func__);
914 if ((m = sshbuf_new()) == NULL)
915 fatal("%s: sshbuf_new failed", __func__);
916 if ((r = sshbuf_put_u32(m, event)) != 0)
917 fatal("%s: buffer error: %s", __func__, ssh_err(r));
919 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, m);
924 mm_audit_run_command(const char *command)
929 debug3("%s entering command %s", __func__, command);
931 if ((m = sshbuf_new()) == NULL)
932 fatal("%s: sshbuf_new failed", __func__);
933 if ((r = sshbuf_put_cstring(m, command)) != 0)
934 fatal("%s: buffer error: %s", __func__, ssh_err(r));
936 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, m);
939 #endif /* SSH_AUDIT_EVENTS */
943 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
949 /* Client doesn't get to see the context */
952 if ((m = sshbuf_new()) == NULL)
953 fatal("%s: sshbuf_new failed", __func__);
954 if ((r = sshbuf_put_string(m, goid->elements, goid->length)) != 0)
955 fatal("%s: buffer error: %s", __func__, ssh_err(r));
957 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, m);
958 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, m);
960 if ((r = sshbuf_get_u32(m, &major)) != 0)
961 fatal("%s: buffer error: %s", __func__, ssh_err(r));
968 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
969 gss_buffer_desc *out, OM_uint32 *flagsp)
976 if ((m = sshbuf_new()) == NULL)
977 fatal("%s: sshbuf_new failed", __func__);
978 if ((r = sshbuf_put_string(m, in->value, in->length)) != 0)
979 fatal("%s: buffer error: %s", __func__, ssh_err(r));
981 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, m);
982 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, m);
984 if ((r = sshbuf_get_u32(m, &major)) != 0 ||
985 (r = ssh_gssapi_get_buffer_desc(m, out)) != 0)
986 fatal("%s: buffer error: %s", __func__, ssh_err(r));
987 if (flagsp != NULL) {
988 if ((r = sshbuf_get_u32(m, &flags)) != 0)
989 fatal("%s: buffer error: %s", __func__, ssh_err(r));
999 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1005 if ((m = sshbuf_new()) == NULL)
1006 fatal("%s: sshbuf_new failed", __func__);
1007 if ((r = sshbuf_put_string(m, gssbuf->value, gssbuf->length)) != 0 ||
1008 (r = sshbuf_put_string(m, gssmic->value, gssmic->length)) != 0)
1009 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1011 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, m);
1012 mm_request_receive_expect(pmonitor->m_recvfd,
1013 MONITOR_ANS_GSSCHECKMIC, m);
1015 if ((r = sshbuf_get_u32(m, &major)) != 0)
1016 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1022 mm_ssh_gssapi_userok(char *user)
1025 int r, authenticated = 0;
1027 if ((m = sshbuf_new()) == NULL)
1028 fatal("%s: sshbuf_new failed", __func__);
1030 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, m);
1031 mm_request_receive_expect(pmonitor->m_recvfd,
1032 MONITOR_ANS_GSSUSEROK, m);
1034 if ((r = sshbuf_get_u32(m, &authenticated)) != 0)
1035 fatal("%s: buffer error: %s", __func__, ssh_err(r));
1038 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1039 return (authenticated);