1 /* $OpenBSD: monitor_wrap.c,v 1.54 2006/08/12 20:46:46 miod 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>
40 #include <openssl/bn.h>
41 #include <openssl/dh.h>
52 #include "auth-options.h"
56 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
59 #define TARGET_OS_MAC 1
67 #include "monitor_wrap.h"
69 #include "monitor_fdpass.h"
78 extern Newkeys *newkeys[];
79 extern z_stream incoming_stream;
80 extern z_stream outgoing_stream;
81 extern struct monitor *pmonitor;
82 extern Buffer input, output;
83 extern Buffer loginmsg;
84 extern ServerOptions options;
90 * m_pid is only set in the privileged part, and
91 * points to the unprivileged child.
93 return (pmonitor && pmonitor->m_pid > 0);
97 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
99 u_int mlen = buffer_len(m);
102 debug3("%s entering: type %d", __func__, type);
104 put_u32(buf, mlen + 1);
105 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
106 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
107 fatal("%s: write: %s", __func__, strerror(errno));
108 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
109 fatal("%s: write: %s", __func__, strerror(errno));
113 mm_request_receive(int sock, Buffer *m)
118 debug3("%s entering", __func__);
120 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
123 fatal("%s: read: %s", __func__, strerror(errno));
125 msg_len = get_u32(buf);
126 if (msg_len > 256 * 1024)
127 fatal("%s: read: bad msg_len %d", __func__, msg_len);
129 buffer_append_space(m, msg_len);
130 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
131 fatal("%s: read: %s", __func__, strerror(errno));
135 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
139 debug3("%s entering: type %d", __func__, type);
141 mm_request_receive(sock, m);
142 rtype = buffer_get_char(m);
144 fatal("%s: read: rtype %d != type %d", __func__,
149 mm_choose_dh(int min, int nbits, int max)
156 buffer_put_int(&m, min);
157 buffer_put_int(&m, nbits);
158 buffer_put_int(&m, max);
160 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
162 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
163 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
165 success = buffer_get_char(&m);
167 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
169 if ((p = BN_new()) == NULL)
170 fatal("%s: BN_new failed", __func__);
171 if ((g = BN_new()) == NULL)
172 fatal("%s: BN_new failed", __func__);
173 buffer_get_bignum2(&m, p);
174 buffer_get_bignum2(&m, g);
176 debug3("%s: remaining %d", __func__, buffer_len(&m));
179 return (dh_new_group(g, p));
183 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
185 Kex *kex = *pmonitor->m_pkex;
188 debug3("%s entering", __func__);
191 buffer_put_int(&m, kex->host_key_index(key));
192 buffer_put_string(&m, data, datalen);
194 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
196 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
197 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
198 *sigp = buffer_get_string(&m, lenp);
205 mm_getpwnamallow(const char *username)
211 debug3("%s entering", __func__);
214 buffer_put_cstring(&m, username);
216 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
218 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
219 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
221 if (buffer_get_char(&m) == 0) {
225 pw = buffer_get_string(&m, &pwlen);
226 if (pwlen != sizeof(struct passwd))
227 fatal("%s: struct passwd size mismatch", __func__);
228 pw->pw_name = buffer_get_string(&m, NULL);
229 pw->pw_passwd = buffer_get_string(&m, NULL);
230 pw->pw_gecos = buffer_get_string(&m, NULL);
231 #ifdef HAVE_PW_CLASS_IN_PASSWD
232 pw->pw_class = buffer_get_string(&m, NULL);
234 pw->pw_dir = buffer_get_string(&m, NULL);
235 pw->pw_shell = buffer_get_string(&m, NULL);
242 mm_auth2_read_banner(void)
247 debug3("%s entering", __func__);
250 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
253 mm_request_receive_expect(pmonitor->m_recvfd,
254 MONITOR_ANS_AUTH2_READ_BANNER, &m);
255 banner = buffer_get_string(&m, NULL);
258 /* treat empty banner as missing banner */
259 if (strlen(banner) == 0) {
266 /* Inform the privileged process about service and style */
269 mm_inform_authserv(char *service, char *style)
273 debug3("%s entering", __func__);
276 buffer_put_cstring(&m, service);
277 buffer_put_cstring(&m, style ? style : "");
279 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
284 /* Do the password authentication */
286 mm_auth_password(Authctxt *authctxt, char *password)
289 int authenticated = 0;
291 debug3("%s entering", __func__);
294 buffer_put_cstring(&m, password);
295 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
297 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
298 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
300 authenticated = buffer_get_int(&m);
304 debug3("%s: user %sauthenticated",
305 __func__, authenticated ? "" : "not ");
306 return (authenticated);
310 mm_user_key_allowed(struct passwd *pw, Key *key)
312 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
316 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
319 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
323 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
324 char *host, Key *key)
328 key->type = KEY_RSA; /* XXX hack for key_to_blob */
329 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
330 key->type = KEY_RSA1;
335 mm_send_debug(Buffer *m)
339 while (buffer_len(m)) {
340 msg = buffer_get_string(m, NULL);
341 debug3("%s: Sending debug: %s", __func__, msg);
342 packet_send_debug("%s", msg);
348 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
353 int allowed = 0, have_forced = 0;
355 debug3("%s entering", __func__);
357 /* Convert the key to a blob and the pass it over */
358 if (!key_to_blob(key, &blob, &len))
362 buffer_put_int(&m, type);
363 buffer_put_cstring(&m, user ? user : "");
364 buffer_put_cstring(&m, host ? host : "");
365 buffer_put_string(&m, blob, len);
368 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
370 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
371 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
373 allowed = buffer_get_int(&m);
375 /* fake forced command */
376 auth_clear_options();
377 have_forced = buffer_get_int(&m);
378 forced_command = have_forced ? xstrdup("true") : NULL;
380 /* Send potential debug messages */
389 * This key verify needs to send the key type along, because the
390 * privileged parent makes the decision if the key is allowed
391 * for authentication.
395 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
402 debug3("%s entering", __func__);
404 /* Convert the key to a blob and the pass it over */
405 if (!key_to_blob(key, &blob, &len))
409 buffer_put_string(&m, blob, len);
410 buffer_put_string(&m, sig, siglen);
411 buffer_put_string(&m, data, datalen);
414 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
416 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
417 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
419 verified = buffer_get_int(&m);
426 /* Export key state after authentication */
428 mm_newkeys_from_blob(u_char *blob, int blen)
432 Newkeys *newkey = NULL;
437 debug3("%s: %p(%d)", __func__, blob, blen);
439 dump_base64(stderr, blob, blen);
442 buffer_append(&b, blob, blen);
444 newkey = xmalloc(sizeof(*newkey));
447 comp = &newkey->comp;
450 enc->name = buffer_get_string(&b, NULL);
451 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
452 enc->enabled = buffer_get_int(&b);
453 enc->block_size = buffer_get_int(&b);
454 enc->key = buffer_get_string(&b, &enc->key_len);
455 enc->iv = buffer_get_string(&b, &len);
456 if (len != enc->block_size)
457 fatal("%s: bad ivlen: expected %u != %u", __func__,
458 enc->block_size, len);
460 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
461 fatal("%s: bad cipher name %s or pointer %p", __func__,
462 enc->name, enc->cipher);
465 mac->name = buffer_get_string(&b, NULL);
466 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
467 fatal("%s: can not init mac %s", __func__, mac->name);
468 mac->enabled = buffer_get_int(&b);
469 mac->key = buffer_get_string(&b, &len);
470 if (len > mac->key_len)
471 fatal("%s: bad mac key length: %u > %d", __func__, len,
476 comp->type = buffer_get_int(&b);
477 comp->enabled = buffer_get_int(&b);
478 comp->name = buffer_get_string(&b, NULL);
480 len = buffer_len(&b);
482 error("newkeys_from_blob: remaining bytes in blob %u", len);
488 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
495 Newkeys *newkey = newkeys[mode];
497 debug3("%s: converting %p", __func__, newkey);
499 if (newkey == NULL) {
500 error("%s: newkey == NULL", __func__);
505 comp = &newkey->comp;
509 buffer_put_cstring(&b, enc->name);
510 /* The cipher struct is constant and shared, you export pointer */
511 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
512 buffer_put_int(&b, enc->enabled);
513 buffer_put_int(&b, enc->block_size);
514 buffer_put_string(&b, enc->key, enc->key_len);
515 packet_get_keyiv(mode, enc->iv, enc->block_size);
516 buffer_put_string(&b, enc->iv, enc->block_size);
519 buffer_put_cstring(&b, mac->name);
520 buffer_put_int(&b, mac->enabled);
521 buffer_put_string(&b, mac->key, mac->key_len);
524 buffer_put_int(&b, comp->type);
525 buffer_put_int(&b, comp->enabled);
526 buffer_put_cstring(&b, comp->name);
528 len = buffer_len(&b);
532 *blobp = xmalloc(len);
533 memcpy(*blobp, buffer_ptr(&b), len);
535 memset(buffer_ptr(&b), 0, len);
541 mm_send_kex(Buffer *m, Kex *kex)
543 buffer_put_string(m, kex->session_id, kex->session_id_len);
544 buffer_put_int(m, kex->we_need);
545 buffer_put_int(m, kex->hostkey_type);
546 buffer_put_int(m, kex->kex_type);
547 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
548 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
549 buffer_put_int(m, kex->flags);
550 buffer_put_cstring(m, kex->client_version_string);
551 buffer_put_cstring(m, kex->server_version_string);
555 mm_send_keystate(struct monitor *monitor)
560 u_int32_t seqnr, packets;
570 buffer_put_int(&m, packet_get_protocol_flags());
572 buffer_put_int(&m, packet_get_ssh1_cipher());
574 debug3("%s: Sending ssh1 KEY+IV", __func__);
575 keylen = packet_get_encryption_key(NULL);
576 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
577 keylen = packet_get_encryption_key(key);
578 buffer_put_string(&m, key, keylen);
579 memset(key, 0, keylen);
582 ivlen = packet_get_keyiv_len(MODE_OUT);
583 packet_get_keyiv(MODE_OUT, iv, ivlen);
584 buffer_put_string(&m, iv, ivlen);
585 ivlen = packet_get_keyiv_len(MODE_OUT);
586 packet_get_keyiv(MODE_IN, iv, ivlen);
587 buffer_put_string(&m, iv, ivlen);
590 /* Kex for rekeying */
591 mm_send_kex(&m, *monitor->m_pkex);
594 debug3("%s: Sending new keys: %p %p",
595 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
598 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
599 fatal("%s: conversion of newkeys failed", __func__);
601 buffer_put_string(&m, blob, bloblen);
604 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
605 fatal("%s: conversion of newkeys failed", __func__);
607 buffer_put_string(&m, blob, bloblen);
610 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
611 buffer_put_int(&m, seqnr);
612 buffer_put_int64(&m, blocks);
613 buffer_put_int(&m, packets);
614 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
615 buffer_put_int(&m, seqnr);
616 buffer_put_int64(&m, blocks);
617 buffer_put_int(&m, packets);
619 debug3("%s: New keys have been sent", __func__);
621 /* More key context */
622 plen = packet_get_keycontext(MODE_OUT, NULL);
624 packet_get_keycontext(MODE_OUT, p);
625 buffer_put_string(&m, p, plen);
628 plen = packet_get_keycontext(MODE_IN, NULL);
630 packet_get_keycontext(MODE_IN, p);
631 buffer_put_string(&m, p, plen);
634 /* Compression state */
635 debug3("%s: Sending compression state", __func__);
636 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
637 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
639 /* Network I/O buffers */
640 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
641 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
643 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
644 debug3("%s: Finished sending state", __func__);
650 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
657 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
659 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
660 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
662 success = buffer_get_int(&m);
664 debug3("%s: pty alloc failed", __func__);
668 p = buffer_get_string(&m, NULL);
669 msg = buffer_get_string(&m, NULL);
672 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
675 buffer_append(&loginmsg, msg, strlen(msg));
678 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
679 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
686 mm_session_pty_cleanup2(Session *s)
693 buffer_put_cstring(&m, s->tty);
694 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
697 /* closed dup'ed master */
698 if (close(s->ptymaster) < 0)
699 error("close(s->ptymaster): %s", strerror(errno));
701 /* unlink pty from session */
707 mm_start_pam(Authctxt *authctxt)
711 debug3("%s entering", __func__);
712 if (!options.use_pam)
713 fatal("UsePAM=no, but ended up in %s anyway", __func__);
716 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
722 mm_do_pam_account(void)
728 debug3("%s entering", __func__);
729 if (!options.use_pam)
730 fatal("UsePAM=no, but ended up in %s anyway", __func__);
733 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
735 mm_request_receive_expect(pmonitor->m_recvfd,
736 MONITOR_ANS_PAM_ACCOUNT, &m);
737 ret = buffer_get_int(&m);
738 msg = buffer_get_string(&m, NULL);
739 buffer_append(&loginmsg, msg, strlen(msg));
744 debug3("%s returning %d", __func__, ret);
750 mm_sshpam_init_ctx(Authctxt *authctxt)
755 debug3("%s", __func__);
757 buffer_put_cstring(&m, authctxt->user);
758 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
759 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
760 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
761 success = buffer_get_int(&m);
763 debug3("%s: pam_init_ctx failed", __func__);
772 mm_sshpam_query(void *ctx, char **name, char **info,
773 u_int *num, char ***prompts, u_int **echo_on)
779 debug3("%s", __func__);
781 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
782 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
783 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
784 ret = buffer_get_int(&m);
785 debug3("%s: pam_query returned %d", __func__, ret);
786 *name = buffer_get_string(&m, NULL);
787 *info = buffer_get_string(&m, NULL);
788 *num = buffer_get_int(&m);
789 if (*num > PAM_MAX_NUM_MSG)
790 fatal("%s: recieved %u PAM messages, expected <= %u",
791 __func__, *num, PAM_MAX_NUM_MSG);
792 *prompts = xcalloc((*num + 1), sizeof(char *));
793 *echo_on = xcalloc((*num + 1), sizeof(u_int));
794 for (i = 0; i < *num; ++i) {
795 (*prompts)[i] = buffer_get_string(&m, NULL);
796 (*echo_on)[i] = buffer_get_int(&m);
803 mm_sshpam_respond(void *ctx, u_int num, char **resp)
809 debug3("%s", __func__);
811 buffer_put_int(&m, num);
812 for (i = 0; i < num; ++i)
813 buffer_put_cstring(&m, resp[i]);
814 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
815 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
816 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
817 ret = buffer_get_int(&m);
818 debug3("%s: pam_respond returned %d", __func__, ret);
824 mm_sshpam_free_ctx(void *ctxtp)
828 debug3("%s", __func__);
830 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
831 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
832 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
837 /* Request process termination */
845 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
850 mm_ssh1_session_key(BIGNUM *num)
856 buffer_put_bignum2(&m, num);
857 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
859 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
861 rsafail = buffer_get_int(&m);
862 buffer_get_bignum2(&m, num);
870 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
871 char ***prompts, u_int **echo_on)
874 *infotxt = xstrdup("");
876 *prompts = xcalloc(*numprompts, sizeof(char *));
877 *echo_on = xcalloc(*numprompts, sizeof(u_int));
882 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
883 u_int *numprompts, char ***prompts, u_int **echo_on)
889 debug3("%s: entering", __func__);
892 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
894 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
896 success = buffer_get_int(&m);
898 debug3("%s: no challenge", __func__);
903 /* Get the challenge, and format the response */
904 challenge = buffer_get_string(&m, NULL);
907 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
908 (*prompts)[0] = challenge;
910 debug3("%s: received challenge: %s", __func__, challenge);
916 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
921 debug3("%s: entering", __func__);
922 if (numresponses != 1)
926 buffer_put_cstring(&m, responses[0]);
927 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
929 mm_request_receive_expect(pmonitor->m_recvfd,
930 MONITOR_ANS_BSDAUTHRESPOND, &m);
932 authok = buffer_get_int(&m);
935 return ((authok == 0) ? -1 : 0);
940 mm_skey_query(void *ctx, char **name, char **infotxt,
941 u_int *numprompts, char ***prompts, u_int **echo_on)
947 debug3("%s: entering", __func__);
950 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
952 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
954 success = buffer_get_int(&m);
956 debug3("%s: no challenge", __func__);
961 /* Get the challenge, and format the response */
962 challenge = buffer_get_string(&m, NULL);
965 debug3("%s: received challenge: %s", __func__, challenge);
967 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
969 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
976 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
981 debug3("%s: entering", __func__);
982 if (numresponses != 1)
986 buffer_put_cstring(&m, responses[0]);
987 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
989 mm_request_receive_expect(pmonitor->m_recvfd,
990 MONITOR_ANS_SKEYRESPOND, &m);
992 authok = buffer_get_int(&m);
995 return ((authok == 0) ? -1 : 0);
1000 mm_ssh1_session_id(u_char session_id[16])
1005 debug3("%s entering", __func__);
1008 for (i = 0; i < 16; i++)
1009 buffer_put_char(&m, session_id[i]);
1011 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1016 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1022 int allowed = 0, have_forced = 0;
1024 debug3("%s entering", __func__);
1027 buffer_put_bignum2(&m, client_n);
1029 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1030 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1032 allowed = buffer_get_int(&m);
1034 /* fake forced command */
1035 auth_clear_options();
1036 have_forced = buffer_get_int(&m);
1037 forced_command = have_forced ? xstrdup("true") : NULL;
1039 if (allowed && rkey != NULL) {
1040 blob = buffer_get_string(&m, &blen);
1041 if ((key = key_from_blob(blob, blen)) == NULL)
1042 fatal("%s: key_from_blob failed", __func__);
1053 mm_auth_rsa_generate_challenge(Key *key)
1060 debug3("%s entering", __func__);
1062 if ((challenge = BN_new()) == NULL)
1063 fatal("%s: BN_new failed", __func__);
1065 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1066 if (key_to_blob(key, &blob, &blen) == 0)
1067 fatal("%s: key_to_blob failed", __func__);
1068 key->type = KEY_RSA1;
1071 buffer_put_string(&m, blob, blen);
1074 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1075 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1077 buffer_get_bignum2(&m, challenge);
1084 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1091 debug3("%s entering", __func__);
1093 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1094 if (key_to_blob(key, &blob, &blen) == 0)
1095 fatal("%s: key_to_blob failed", __func__);
1096 key->type = KEY_RSA1;
1099 buffer_put_string(&m, blob, blen);
1100 buffer_put_string(&m, response, 16);
1103 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1104 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1106 success = buffer_get_int(&m);
1112 #ifdef SSH_AUDIT_EVENTS
1114 mm_audit_event(ssh_audit_event_t event)
1118 debug3("%s entering", __func__);
1121 buffer_put_int(&m, event);
1123 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1128 mm_audit_run_command(const char *command)
1132 debug3("%s entering command %s", __func__, command);
1135 buffer_put_cstring(&m, command);
1137 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1140 #endif /* SSH_AUDIT_EVENTS */
1144 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1149 /* Client doesn't get to see the context */
1153 buffer_put_string(&m, goid->elements, goid->length);
1155 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1156 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1158 major = buffer_get_int(&m);
1165 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1166 gss_buffer_desc *out, OM_uint32 *flags)
1173 buffer_put_string(&m, in->value, in->length);
1175 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1176 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1178 major = buffer_get_int(&m);
1179 out->value = buffer_get_string(&m, &len);
1182 *flags = buffer_get_int(&m);
1190 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1196 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1197 buffer_put_string(&m, gssmic->value, gssmic->length);
1199 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1200 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1203 major = buffer_get_int(&m);
1209 mm_ssh_gssapi_userok(char *user)
1212 int authenticated = 0;
1216 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1217 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1220 authenticated = buffer_get_int(&m);
1223 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1224 return (authenticated);