1 /* $OpenBSD: monitor_wrap.c,v 1.49 2006/08/01 23:22:47 stevesk 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>
32 #include <openssl/bn.h>
33 #include <openssl/dh.h>
44 #include "auth-options.h"
50 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
53 #define TARGET_OS_MAC 1
58 #include "monitor_wrap.h"
61 #include "monitor_fdpass.h"
75 extern Newkeys *newkeys[];
76 extern z_stream incoming_stream;
77 extern z_stream outgoing_stream;
78 extern struct monitor *pmonitor;
79 extern Buffer input, output;
80 extern Buffer loginmsg;
81 extern ServerOptions options;
87 * m_pid is only set in the privileged part, and
88 * points to the unprivileged child.
90 return (pmonitor && pmonitor->m_pid > 0);
94 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
96 u_int mlen = buffer_len(m);
99 debug3("%s entering: type %d", __func__, type);
101 put_u32(buf, mlen + 1);
102 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
103 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
104 fatal("%s: write: %s", __func__, strerror(errno));
105 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
106 fatal("%s: write: %s", __func__, strerror(errno));
110 mm_request_receive(int sock, Buffer *m)
115 debug3("%s entering", __func__);
117 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
120 fatal("%s: read: %s", __func__, strerror(errno));
122 msg_len = get_u32(buf);
123 if (msg_len > 256 * 1024)
124 fatal("%s: read: bad msg_len %d", __func__, msg_len);
126 buffer_append_space(m, msg_len);
127 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
128 fatal("%s: read: %s", __func__, strerror(errno));
132 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
136 debug3("%s entering: type %d", __func__, type);
138 mm_request_receive(sock, m);
139 rtype = buffer_get_char(m);
141 fatal("%s: read: rtype %d != type %d", __func__,
146 mm_choose_dh(int min, int nbits, int max)
153 buffer_put_int(&m, min);
154 buffer_put_int(&m, nbits);
155 buffer_put_int(&m, max);
157 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
159 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
160 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
162 success = buffer_get_char(&m);
164 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
166 if ((p = BN_new()) == NULL)
167 fatal("%s: BN_new failed", __func__);
168 if ((g = BN_new()) == NULL)
169 fatal("%s: BN_new failed", __func__);
170 buffer_get_bignum2(&m, p);
171 buffer_get_bignum2(&m, g);
173 debug3("%s: remaining %d", __func__, buffer_len(&m));
176 return (dh_new_group(g, p));
180 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
182 Kex *kex = *pmonitor->m_pkex;
185 debug3("%s entering", __func__);
188 buffer_put_int(&m, kex->host_key_index(key));
189 buffer_put_string(&m, data, datalen);
191 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
193 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
194 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
195 *sigp = buffer_get_string(&m, lenp);
202 mm_getpwnamallow(const char *username)
208 debug3("%s entering", __func__);
211 buffer_put_cstring(&m, username);
213 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
215 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
216 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
218 if (buffer_get_char(&m) == 0) {
222 pw = buffer_get_string(&m, &pwlen);
223 if (pwlen != sizeof(struct passwd))
224 fatal("%s: struct passwd size mismatch", __func__);
225 pw->pw_name = buffer_get_string(&m, NULL);
226 pw->pw_passwd = buffer_get_string(&m, NULL);
227 pw->pw_gecos = buffer_get_string(&m, NULL);
228 #ifdef HAVE_PW_CLASS_IN_PASSWD
229 pw->pw_class = buffer_get_string(&m, NULL);
231 pw->pw_dir = buffer_get_string(&m, NULL);
232 pw->pw_shell = buffer_get_string(&m, NULL);
239 mm_auth2_read_banner(void)
244 debug3("%s entering", __func__);
247 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
250 mm_request_receive_expect(pmonitor->m_recvfd,
251 MONITOR_ANS_AUTH2_READ_BANNER, &m);
252 banner = buffer_get_string(&m, NULL);
255 /* treat empty banner as missing banner */
256 if (strlen(banner) == 0) {
263 /* Inform the privileged process about service and style */
266 mm_inform_authserv(char *service, char *style)
270 debug3("%s entering", __func__);
273 buffer_put_cstring(&m, service);
274 buffer_put_cstring(&m, style ? style : "");
276 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
281 /* Do the password authentication */
283 mm_auth_password(Authctxt *authctxt, char *password)
286 int authenticated = 0;
288 debug3("%s entering", __func__);
291 buffer_put_cstring(&m, password);
292 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
294 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
295 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
297 authenticated = buffer_get_int(&m);
301 debug3("%s: user %sauthenticated",
302 __func__, authenticated ? "" : "not ");
303 return (authenticated);
307 mm_user_key_allowed(struct passwd *pw, Key *key)
309 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
313 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
316 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
320 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
321 char *host, Key *key)
325 key->type = KEY_RSA; /* XXX hack for key_to_blob */
326 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
327 key->type = KEY_RSA1;
332 mm_send_debug(Buffer *m)
336 while (buffer_len(m)) {
337 msg = buffer_get_string(m, NULL);
338 debug3("%s: Sending debug: %s", __func__, msg);
339 packet_send_debug("%s", msg);
345 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
350 int allowed = 0, have_forced = 0;
352 debug3("%s entering", __func__);
354 /* Convert the key to a blob and the pass it over */
355 if (!key_to_blob(key, &blob, &len))
359 buffer_put_int(&m, type);
360 buffer_put_cstring(&m, user ? user : "");
361 buffer_put_cstring(&m, host ? host : "");
362 buffer_put_string(&m, blob, len);
365 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
367 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
368 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
370 allowed = buffer_get_int(&m);
372 /* fake forced command */
373 auth_clear_options();
374 have_forced = buffer_get_int(&m);
375 forced_command = have_forced ? xstrdup("true") : NULL;
377 /* Send potential debug messages */
386 * This key verify needs to send the key type along, because the
387 * privileged parent makes the decision if the key is allowed
388 * for authentication.
392 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
399 debug3("%s entering", __func__);
401 /* Convert the key to a blob and the pass it over */
402 if (!key_to_blob(key, &blob, &len))
406 buffer_put_string(&m, blob, len);
407 buffer_put_string(&m, sig, siglen);
408 buffer_put_string(&m, data, datalen);
411 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
413 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
414 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
416 verified = buffer_get_int(&m);
423 /* Export key state after authentication */
425 mm_newkeys_from_blob(u_char *blob, int blen)
429 Newkeys *newkey = NULL;
434 debug3("%s: %p(%d)", __func__, blob, blen);
436 dump_base64(stderr, blob, blen);
439 buffer_append(&b, blob, blen);
441 newkey = xmalloc(sizeof(*newkey));
444 comp = &newkey->comp;
447 enc->name = buffer_get_string(&b, NULL);
448 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
449 enc->enabled = buffer_get_int(&b);
450 enc->block_size = buffer_get_int(&b);
451 enc->key = buffer_get_string(&b, &enc->key_len);
452 enc->iv = buffer_get_string(&b, &len);
453 if (len != enc->block_size)
454 fatal("%s: bad ivlen: expected %u != %u", __func__,
455 enc->block_size, len);
457 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
458 fatal("%s: bad cipher name %s or pointer %p", __func__,
459 enc->name, enc->cipher);
462 mac->name = buffer_get_string(&b, NULL);
463 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
464 fatal("%s: can not init mac %s", __func__, mac->name);
465 mac->enabled = buffer_get_int(&b);
466 mac->key = buffer_get_string(&b, &len);
467 if (len > mac->key_len)
468 fatal("%s: bad mac key length: %u > %d", __func__, len,
473 comp->type = buffer_get_int(&b);
474 comp->enabled = buffer_get_int(&b);
475 comp->name = buffer_get_string(&b, NULL);
477 len = buffer_len(&b);
479 error("newkeys_from_blob: remaining bytes in blob %u", len);
485 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
492 Newkeys *newkey = newkeys[mode];
494 debug3("%s: converting %p", __func__, newkey);
496 if (newkey == NULL) {
497 error("%s: newkey == NULL", __func__);
502 comp = &newkey->comp;
506 buffer_put_cstring(&b, enc->name);
507 /* The cipher struct is constant and shared, you export pointer */
508 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
509 buffer_put_int(&b, enc->enabled);
510 buffer_put_int(&b, enc->block_size);
511 buffer_put_string(&b, enc->key, enc->key_len);
512 packet_get_keyiv(mode, enc->iv, enc->block_size);
513 buffer_put_string(&b, enc->iv, enc->block_size);
516 buffer_put_cstring(&b, mac->name);
517 buffer_put_int(&b, mac->enabled);
518 buffer_put_string(&b, mac->key, mac->key_len);
521 buffer_put_int(&b, comp->type);
522 buffer_put_int(&b, comp->enabled);
523 buffer_put_cstring(&b, comp->name);
525 len = buffer_len(&b);
529 *blobp = xmalloc(len);
530 memcpy(*blobp, buffer_ptr(&b), len);
532 memset(buffer_ptr(&b), 0, len);
538 mm_send_kex(Buffer *m, Kex *kex)
540 buffer_put_string(m, kex->session_id, kex->session_id_len);
541 buffer_put_int(m, kex->we_need);
542 buffer_put_int(m, kex->hostkey_type);
543 buffer_put_int(m, kex->kex_type);
544 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
545 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
546 buffer_put_int(m, kex->flags);
547 buffer_put_cstring(m, kex->client_version_string);
548 buffer_put_cstring(m, kex->server_version_string);
552 mm_send_keystate(struct monitor *monitor)
557 u_int32_t seqnr, packets;
567 buffer_put_int(&m, packet_get_protocol_flags());
569 buffer_put_int(&m, packet_get_ssh1_cipher());
571 debug3("%s: Sending ssh1 KEY+IV", __func__);
572 keylen = packet_get_encryption_key(NULL);
573 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
574 keylen = packet_get_encryption_key(key);
575 buffer_put_string(&m, key, keylen);
576 memset(key, 0, keylen);
579 ivlen = packet_get_keyiv_len(MODE_OUT);
580 packet_get_keyiv(MODE_OUT, iv, ivlen);
581 buffer_put_string(&m, iv, ivlen);
582 ivlen = packet_get_keyiv_len(MODE_OUT);
583 packet_get_keyiv(MODE_IN, iv, ivlen);
584 buffer_put_string(&m, iv, ivlen);
587 /* Kex for rekeying */
588 mm_send_kex(&m, *monitor->m_pkex);
591 debug3("%s: Sending new keys: %p %p",
592 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
595 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
596 fatal("%s: conversion of newkeys failed", __func__);
598 buffer_put_string(&m, blob, bloblen);
601 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
602 fatal("%s: conversion of newkeys failed", __func__);
604 buffer_put_string(&m, blob, bloblen);
607 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
608 buffer_put_int(&m, seqnr);
609 buffer_put_int64(&m, blocks);
610 buffer_put_int(&m, packets);
611 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
612 buffer_put_int(&m, seqnr);
613 buffer_put_int64(&m, blocks);
614 buffer_put_int(&m, packets);
616 debug3("%s: New keys have been sent", __func__);
618 /* More key context */
619 plen = packet_get_keycontext(MODE_OUT, NULL);
621 packet_get_keycontext(MODE_OUT, p);
622 buffer_put_string(&m, p, plen);
625 plen = packet_get_keycontext(MODE_IN, NULL);
627 packet_get_keycontext(MODE_IN, p);
628 buffer_put_string(&m, p, plen);
631 /* Compression state */
632 debug3("%s: Sending compression state", __func__);
633 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
634 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
636 /* Network I/O buffers */
637 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
638 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
640 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
641 debug3("%s: Finished sending state", __func__);
647 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
654 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
656 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
657 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
659 success = buffer_get_int(&m);
661 debug3("%s: pty alloc failed", __func__);
665 p = buffer_get_string(&m, NULL);
666 msg = buffer_get_string(&m, NULL);
669 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
672 buffer_append(&loginmsg, msg, strlen(msg));
675 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
676 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
683 mm_session_pty_cleanup2(Session *s)
690 buffer_put_cstring(&m, s->tty);
691 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
694 /* closed dup'ed master */
695 if (close(s->ptymaster) < 0)
696 error("close(s->ptymaster): %s", strerror(errno));
698 /* unlink pty from session */
704 mm_start_pam(Authctxt *authctxt)
708 debug3("%s entering", __func__);
709 if (!options.use_pam)
710 fatal("UsePAM=no, but ended up in %s anyway", __func__);
713 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
719 mm_do_pam_account(void)
725 debug3("%s entering", __func__);
726 if (!options.use_pam)
727 fatal("UsePAM=no, but ended up in %s anyway", __func__);
730 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
732 mm_request_receive_expect(pmonitor->m_recvfd,
733 MONITOR_ANS_PAM_ACCOUNT, &m);
734 ret = buffer_get_int(&m);
735 msg = buffer_get_string(&m, NULL);
736 buffer_append(&loginmsg, msg, strlen(msg));
741 debug3("%s returning %d", __func__, ret);
747 mm_sshpam_init_ctx(Authctxt *authctxt)
752 debug3("%s", __func__);
754 buffer_put_cstring(&m, authctxt->user);
755 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
756 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
757 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
758 success = buffer_get_int(&m);
760 debug3("%s: pam_init_ctx failed", __func__);
769 mm_sshpam_query(void *ctx, char **name, char **info,
770 u_int *num, char ***prompts, u_int **echo_on)
776 debug3("%s", __func__);
778 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
779 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
780 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
781 ret = buffer_get_int(&m);
782 debug3("%s: pam_query returned %d", __func__, ret);
783 *name = buffer_get_string(&m, NULL);
784 *info = buffer_get_string(&m, NULL);
785 *num = buffer_get_int(&m);
786 if (*num > PAM_MAX_NUM_MSG)
787 fatal("%s: recieved %u PAM messages, expected <= %u",
788 __func__, *num, PAM_MAX_NUM_MSG);
789 *prompts = xcalloc((*num + 1), sizeof(char *));
790 *echo_on = xcalloc((*num + 1), sizeof(u_int));
791 for (i = 0; i < *num; ++i) {
792 (*prompts)[i] = buffer_get_string(&m, NULL);
793 (*echo_on)[i] = buffer_get_int(&m);
800 mm_sshpam_respond(void *ctx, u_int num, char **resp)
806 debug3("%s", __func__);
808 buffer_put_int(&m, num);
809 for (i = 0; i < num; ++i)
810 buffer_put_cstring(&m, resp[i]);
811 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
812 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
813 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
814 ret = buffer_get_int(&m);
815 debug3("%s: pam_respond returned %d", __func__, ret);
821 mm_sshpam_free_ctx(void *ctxtp)
825 debug3("%s", __func__);
827 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
828 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
829 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
834 /* Request process termination */
842 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
847 mm_ssh1_session_key(BIGNUM *num)
853 buffer_put_bignum2(&m, num);
854 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
856 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
858 rsafail = buffer_get_int(&m);
859 buffer_get_bignum2(&m, num);
867 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
868 char ***prompts, u_int **echo_on)
871 *infotxt = xstrdup("");
873 *prompts = xcalloc(*numprompts, sizeof(char *));
874 *echo_on = xcalloc(*numprompts, sizeof(u_int));
879 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
880 u_int *numprompts, char ***prompts, u_int **echo_on)
886 debug3("%s: entering", __func__);
889 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
891 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
893 success = buffer_get_int(&m);
895 debug3("%s: no challenge", __func__);
900 /* Get the challenge, and format the response */
901 challenge = buffer_get_string(&m, NULL);
904 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
905 (*prompts)[0] = challenge;
907 debug3("%s: received challenge: %s", __func__, challenge);
913 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
918 debug3("%s: entering", __func__);
919 if (numresponses != 1)
923 buffer_put_cstring(&m, responses[0]);
924 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
926 mm_request_receive_expect(pmonitor->m_recvfd,
927 MONITOR_ANS_BSDAUTHRESPOND, &m);
929 authok = buffer_get_int(&m);
932 return ((authok == 0) ? -1 : 0);
937 mm_skey_query(void *ctx, char **name, char **infotxt,
938 u_int *numprompts, char ***prompts, u_int **echo_on)
945 debug3("%s: entering", __func__);
948 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
950 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
952 success = buffer_get_int(&m);
954 debug3("%s: no challenge", __func__);
959 /* Get the challenge, and format the response */
960 challenge = buffer_get_string(&m, NULL);
963 debug3("%s: received challenge: %s", __func__, challenge);
965 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
967 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
974 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
979 debug3("%s: entering", __func__);
980 if (numresponses != 1)
984 buffer_put_cstring(&m, responses[0]);
985 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
987 mm_request_receive_expect(pmonitor->m_recvfd,
988 MONITOR_ANS_SKEYRESPOND, &m);
990 authok = buffer_get_int(&m);
993 return ((authok == 0) ? -1 : 0);
998 mm_ssh1_session_id(u_char session_id[16])
1003 debug3("%s entering", __func__);
1006 for (i = 0; i < 16; i++)
1007 buffer_put_char(&m, session_id[i]);
1009 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1014 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1020 int allowed = 0, have_forced = 0;
1022 debug3("%s entering", __func__);
1025 buffer_put_bignum2(&m, client_n);
1027 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1028 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1030 allowed = buffer_get_int(&m);
1032 /* fake forced command */
1033 auth_clear_options();
1034 have_forced = buffer_get_int(&m);
1035 forced_command = have_forced ? xstrdup("true") : NULL;
1037 if (allowed && rkey != NULL) {
1038 blob = buffer_get_string(&m, &blen);
1039 if ((key = key_from_blob(blob, blen)) == NULL)
1040 fatal("%s: key_from_blob failed", __func__);
1051 mm_auth_rsa_generate_challenge(Key *key)
1058 debug3("%s entering", __func__);
1060 if ((challenge = BN_new()) == NULL)
1061 fatal("%s: BN_new failed", __func__);
1063 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1064 if (key_to_blob(key, &blob, &blen) == 0)
1065 fatal("%s: key_to_blob failed", __func__);
1066 key->type = KEY_RSA1;
1069 buffer_put_string(&m, blob, blen);
1072 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1073 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1075 buffer_get_bignum2(&m, challenge);
1082 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1089 debug3("%s entering", __func__);
1091 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1092 if (key_to_blob(key, &blob, &blen) == 0)
1093 fatal("%s: key_to_blob failed", __func__);
1094 key->type = KEY_RSA1;
1097 buffer_put_string(&m, blob, blen);
1098 buffer_put_string(&m, response, 16);
1101 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1102 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1104 success = buffer_get_int(&m);
1110 #ifdef SSH_AUDIT_EVENTS
1112 mm_audit_event(ssh_audit_event_t event)
1116 debug3("%s entering", __func__);
1119 buffer_put_int(&m, event);
1121 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1126 mm_audit_run_command(const char *command)
1130 debug3("%s entering command %s", __func__, command);
1133 buffer_put_cstring(&m, command);
1135 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1138 #endif /* SSH_AUDIT_EVENTS */
1142 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1147 /* Client doesn't get to see the context */
1151 buffer_put_string(&m, goid->elements, goid->length);
1153 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1154 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1156 major = buffer_get_int(&m);
1163 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1164 gss_buffer_desc *out, OM_uint32 *flags)
1171 buffer_put_string(&m, in->value, in->length);
1173 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1174 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1176 major = buffer_get_int(&m);
1177 out->value = buffer_get_string(&m, &len);
1180 *flags = buffer_get_int(&m);
1188 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1194 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1195 buffer_put_string(&m, gssmic->value, gssmic->length);
1197 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1198 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1201 major = buffer_get_int(&m);
1207 mm_ssh_gssapi_userok(char *user)
1210 int authenticated = 0;
1214 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1215 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1218 authenticated = buffer_get_int(&m);
1221 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1222 return (authenticated);