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>
41 #include <openssl/bn.h>
42 #include <openssl/dh.h>
53 #include "auth-options.h"
57 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
60 #define TARGET_OS_MAC 1
68 #include "monitor_wrap.h"
70 #include "monitor_fdpass.h"
79 extern Newkeys *newkeys[];
80 extern z_stream incoming_stream;
81 extern z_stream outgoing_stream;
82 extern struct monitor *pmonitor;
83 extern Buffer input, output;
84 extern Buffer loginmsg;
85 extern ServerOptions options;
91 * m_pid is only set in the privileged part, and
92 * points to the unprivileged child.
94 return (pmonitor && pmonitor->m_pid > 0);
98 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
100 u_int mlen = buffer_len(m);
103 debug3("%s entering: type %d", __func__, type);
105 put_u32(buf, mlen + 1);
106 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
107 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
108 fatal("%s: write: %s", __func__, strerror(errno));
109 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
110 fatal("%s: write: %s", __func__, strerror(errno));
114 mm_request_receive(int sock, Buffer *m)
119 debug3("%s entering", __func__);
121 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
124 fatal("%s: read: %s", __func__, strerror(errno));
126 msg_len = get_u32(buf);
127 if (msg_len > 256 * 1024)
128 fatal("%s: read: bad msg_len %d", __func__, msg_len);
130 buffer_append_space(m, msg_len);
131 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
132 fatal("%s: read: %s", __func__, strerror(errno));
136 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
140 debug3("%s entering: type %d", __func__, type);
142 mm_request_receive(sock, m);
143 rtype = buffer_get_char(m);
145 fatal("%s: read: rtype %d != type %d", __func__,
150 mm_choose_dh(int min, int nbits, int max)
157 buffer_put_int(&m, min);
158 buffer_put_int(&m, nbits);
159 buffer_put_int(&m, max);
161 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
163 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
164 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
166 success = buffer_get_char(&m);
168 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
170 if ((p = BN_new()) == NULL)
171 fatal("%s: BN_new failed", __func__);
172 if ((g = BN_new()) == NULL)
173 fatal("%s: BN_new failed", __func__);
174 buffer_get_bignum2(&m, p);
175 buffer_get_bignum2(&m, g);
177 debug3("%s: remaining %d", __func__, buffer_len(&m));
180 return (dh_new_group(g, p));
184 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
186 Kex *kex = *pmonitor->m_pkex;
189 debug3("%s entering", __func__);
192 buffer_put_int(&m, kex->host_key_index(key));
193 buffer_put_string(&m, data, datalen);
195 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
197 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
198 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
199 *sigp = buffer_get_string(&m, lenp);
206 mm_getpwnamallow(const char *username)
212 debug3("%s entering", __func__);
215 buffer_put_cstring(&m, username);
217 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
219 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
220 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
222 if (buffer_get_char(&m) == 0) {
226 pw = buffer_get_string(&m, &pwlen);
227 if (pwlen != sizeof(struct passwd))
228 fatal("%s: struct passwd size mismatch", __func__);
229 pw->pw_name = buffer_get_string(&m, NULL);
230 pw->pw_passwd = buffer_get_string(&m, NULL);
231 pw->pw_gecos = buffer_get_string(&m, NULL);
232 #ifdef HAVE_PW_CLASS_IN_PASSWD
233 pw->pw_class = buffer_get_string(&m, NULL);
235 pw->pw_dir = buffer_get_string(&m, NULL);
236 pw->pw_shell = buffer_get_string(&m, NULL);
243 mm_auth2_read_banner(void)
248 debug3("%s entering", __func__);
251 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
254 mm_request_receive_expect(pmonitor->m_recvfd,
255 MONITOR_ANS_AUTH2_READ_BANNER, &m);
256 banner = buffer_get_string(&m, NULL);
259 /* treat empty banner as missing banner */
260 if (strlen(banner) == 0) {
267 /* Inform the privileged process about service and style */
270 mm_inform_authserv(char *service, char *style)
274 debug3("%s entering", __func__);
277 buffer_put_cstring(&m, service);
278 buffer_put_cstring(&m, style ? style : "");
280 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
285 /* Do the password authentication */
287 mm_auth_password(Authctxt *authctxt, char *password)
290 int authenticated = 0;
292 debug3("%s entering", __func__);
295 buffer_put_cstring(&m, password);
296 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
298 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
299 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
301 authenticated = buffer_get_int(&m);
305 debug3("%s: user %sauthenticated",
306 __func__, authenticated ? "" : "not ");
307 return (authenticated);
311 mm_user_key_allowed(struct passwd *pw, Key *key)
313 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
317 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
320 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
324 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
325 char *host, Key *key)
329 key->type = KEY_RSA; /* XXX hack for key_to_blob */
330 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
331 key->type = KEY_RSA1;
336 mm_send_debug(Buffer *m)
340 while (buffer_len(m)) {
341 msg = buffer_get_string(m, NULL);
342 debug3("%s: Sending debug: %s", __func__, msg);
343 packet_send_debug("%s", msg);
349 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
354 int allowed = 0, have_forced = 0;
356 debug3("%s entering", __func__);
358 /* Convert the key to a blob and the pass it over */
359 if (!key_to_blob(key, &blob, &len))
363 buffer_put_int(&m, type);
364 buffer_put_cstring(&m, user ? user : "");
365 buffer_put_cstring(&m, host ? host : "");
366 buffer_put_string(&m, blob, len);
369 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
371 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
372 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
374 allowed = buffer_get_int(&m);
376 /* fake forced command */
377 auth_clear_options();
378 have_forced = buffer_get_int(&m);
379 forced_command = have_forced ? xstrdup("true") : NULL;
381 /* Send potential debug messages */
390 * This key verify needs to send the key type along, because the
391 * privileged parent makes the decision if the key is allowed
392 * for authentication.
396 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
403 debug3("%s entering", __func__);
405 /* Convert the key to a blob and the pass it over */
406 if (!key_to_blob(key, &blob, &len))
410 buffer_put_string(&m, blob, len);
411 buffer_put_string(&m, sig, siglen);
412 buffer_put_string(&m, data, datalen);
415 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
417 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
418 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
420 verified = buffer_get_int(&m);
427 /* Export key state after authentication */
429 mm_newkeys_from_blob(u_char *blob, int blen)
433 Newkeys *newkey = NULL;
438 debug3("%s: %p(%d)", __func__, blob, blen);
440 dump_base64(stderr, blob, blen);
443 buffer_append(&b, blob, blen);
445 newkey = xmalloc(sizeof(*newkey));
448 comp = &newkey->comp;
451 enc->name = buffer_get_string(&b, NULL);
452 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
453 enc->enabled = buffer_get_int(&b);
454 enc->block_size = buffer_get_int(&b);
455 enc->key = buffer_get_string(&b, &enc->key_len);
456 enc->iv = buffer_get_string(&b, &len);
457 if (len != enc->block_size)
458 fatal("%s: bad ivlen: expected %u != %u", __func__,
459 enc->block_size, len);
461 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
462 fatal("%s: bad cipher name %s or pointer %p", __func__,
463 enc->name, enc->cipher);
466 mac->name = buffer_get_string(&b, NULL);
467 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
468 fatal("%s: can not init mac %s", __func__, mac->name);
469 mac->enabled = buffer_get_int(&b);
470 mac->key = buffer_get_string(&b, &len);
471 if (len > mac->key_len)
472 fatal("%s: bad mac key length: %u > %d", __func__, len,
477 comp->type = buffer_get_int(&b);
478 comp->enabled = buffer_get_int(&b);
479 comp->name = buffer_get_string(&b, NULL);
481 len = buffer_len(&b);
483 error("newkeys_from_blob: remaining bytes in blob %u", len);
489 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
496 Newkeys *newkey = newkeys[mode];
498 debug3("%s: converting %p", __func__, newkey);
500 if (newkey == NULL) {
501 error("%s: newkey == NULL", __func__);
506 comp = &newkey->comp;
510 buffer_put_cstring(&b, enc->name);
511 /* The cipher struct is constant and shared, you export pointer */
512 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
513 buffer_put_int(&b, enc->enabled);
514 buffer_put_int(&b, enc->block_size);
515 buffer_put_string(&b, enc->key, enc->key_len);
516 packet_get_keyiv(mode, enc->iv, enc->block_size);
517 buffer_put_string(&b, enc->iv, enc->block_size);
520 buffer_put_cstring(&b, mac->name);
521 buffer_put_int(&b, mac->enabled);
522 buffer_put_string(&b, mac->key, mac->key_len);
525 buffer_put_int(&b, comp->type);
526 buffer_put_int(&b, comp->enabled);
527 buffer_put_cstring(&b, comp->name);
529 len = buffer_len(&b);
533 *blobp = xmalloc(len);
534 memcpy(*blobp, buffer_ptr(&b), len);
536 memset(buffer_ptr(&b), 0, len);
542 mm_send_kex(Buffer *m, Kex *kex)
544 buffer_put_string(m, kex->session_id, kex->session_id_len);
545 buffer_put_int(m, kex->we_need);
546 buffer_put_int(m, kex->hostkey_type);
547 buffer_put_int(m, kex->kex_type);
548 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
549 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
550 buffer_put_int(m, kex->flags);
551 buffer_put_cstring(m, kex->client_version_string);
552 buffer_put_cstring(m, kex->server_version_string);
556 mm_send_keystate(struct monitor *monitor)
561 u_int32_t seqnr, packets;
571 buffer_put_int(&m, packet_get_protocol_flags());
573 buffer_put_int(&m, packet_get_ssh1_cipher());
575 debug3("%s: Sending ssh1 KEY+IV", __func__);
576 keylen = packet_get_encryption_key(NULL);
577 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
578 keylen = packet_get_encryption_key(key);
579 buffer_put_string(&m, key, keylen);
580 memset(key, 0, keylen);
583 ivlen = packet_get_keyiv_len(MODE_OUT);
584 packet_get_keyiv(MODE_OUT, iv, ivlen);
585 buffer_put_string(&m, iv, ivlen);
586 ivlen = packet_get_keyiv_len(MODE_OUT);
587 packet_get_keyiv(MODE_IN, iv, ivlen);
588 buffer_put_string(&m, iv, ivlen);
591 /* Kex for rekeying */
592 mm_send_kex(&m, *monitor->m_pkex);
595 debug3("%s: Sending new keys: %p %p",
596 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
599 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
600 fatal("%s: conversion of newkeys failed", __func__);
602 buffer_put_string(&m, blob, bloblen);
605 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
606 fatal("%s: conversion of newkeys failed", __func__);
608 buffer_put_string(&m, blob, bloblen);
611 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
612 buffer_put_int(&m, seqnr);
613 buffer_put_int64(&m, blocks);
614 buffer_put_int(&m, packets);
615 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
616 buffer_put_int(&m, seqnr);
617 buffer_put_int64(&m, blocks);
618 buffer_put_int(&m, packets);
620 debug3("%s: New keys have been sent", __func__);
622 /* More key context */
623 plen = packet_get_keycontext(MODE_OUT, NULL);
625 packet_get_keycontext(MODE_OUT, p);
626 buffer_put_string(&m, p, plen);
629 plen = packet_get_keycontext(MODE_IN, NULL);
631 packet_get_keycontext(MODE_IN, p);
632 buffer_put_string(&m, p, plen);
635 /* Compression state */
636 debug3("%s: Sending compression state", __func__);
637 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
638 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
640 /* Network I/O buffers */
641 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
642 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
644 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
645 debug3("%s: Finished sending state", __func__);
651 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
658 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
660 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
661 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
663 success = buffer_get_int(&m);
665 debug3("%s: pty alloc failed", __func__);
669 p = buffer_get_string(&m, NULL);
670 msg = buffer_get_string(&m, NULL);
673 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
676 buffer_append(&loginmsg, msg, strlen(msg));
679 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
680 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
687 mm_session_pty_cleanup2(Session *s)
694 buffer_put_cstring(&m, s->tty);
695 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
698 /* closed dup'ed master */
699 if (close(s->ptymaster) < 0)
700 error("close(s->ptymaster): %s", strerror(errno));
702 /* unlink pty from session */
708 mm_start_pam(Authctxt *authctxt)
712 debug3("%s entering", __func__);
713 if (!options.use_pam)
714 fatal("UsePAM=no, but ended up in %s anyway", __func__);
717 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
723 mm_do_pam_account(void)
729 debug3("%s entering", __func__);
730 if (!options.use_pam)
731 fatal("UsePAM=no, but ended up in %s anyway", __func__);
734 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
736 mm_request_receive_expect(pmonitor->m_recvfd,
737 MONITOR_ANS_PAM_ACCOUNT, &m);
738 ret = buffer_get_int(&m);
739 msg = buffer_get_string(&m, NULL);
740 buffer_append(&loginmsg, msg, strlen(msg));
745 debug3("%s returning %d", __func__, ret);
751 mm_sshpam_init_ctx(Authctxt *authctxt)
756 debug3("%s", __func__);
758 buffer_put_cstring(&m, authctxt->user);
759 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
760 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
761 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
762 success = buffer_get_int(&m);
764 debug3("%s: pam_init_ctx failed", __func__);
773 mm_sshpam_query(void *ctx, char **name, char **info,
774 u_int *num, char ***prompts, u_int **echo_on)
780 debug3("%s", __func__);
782 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
783 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
784 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
785 ret = buffer_get_int(&m);
786 debug3("%s: pam_query returned %d", __func__, ret);
787 *name = buffer_get_string(&m, NULL);
788 *info = buffer_get_string(&m, NULL);
789 *num = buffer_get_int(&m);
790 if (*num > PAM_MAX_NUM_MSG)
791 fatal("%s: recieved %u PAM messages, expected <= %u",
792 __func__, *num, PAM_MAX_NUM_MSG);
793 *prompts = xcalloc((*num + 1), sizeof(char *));
794 *echo_on = xcalloc((*num + 1), sizeof(u_int));
795 for (i = 0; i < *num; ++i) {
796 (*prompts)[i] = buffer_get_string(&m, NULL);
797 (*echo_on)[i] = buffer_get_int(&m);
804 mm_sshpam_respond(void *ctx, u_int num, char **resp)
810 debug3("%s", __func__);
812 buffer_put_int(&m, num);
813 for (i = 0; i < num; ++i)
814 buffer_put_cstring(&m, resp[i]);
815 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
816 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
817 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
818 ret = buffer_get_int(&m);
819 debug3("%s: pam_respond returned %d", __func__, ret);
825 mm_sshpam_free_ctx(void *ctxtp)
829 debug3("%s", __func__);
831 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
832 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
833 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
838 /* Request process termination */
846 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
851 mm_ssh1_session_key(BIGNUM *num)
857 buffer_put_bignum2(&m, num);
858 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
860 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
862 rsafail = buffer_get_int(&m);
863 buffer_get_bignum2(&m, num);
871 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
872 char ***prompts, u_int **echo_on)
875 *infotxt = xstrdup("");
877 *prompts = xcalloc(*numprompts, sizeof(char *));
878 *echo_on = xcalloc(*numprompts, sizeof(u_int));
883 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
884 u_int *numprompts, char ***prompts, u_int **echo_on)
890 debug3("%s: entering", __func__);
893 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
895 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
897 success = buffer_get_int(&m);
899 debug3("%s: no challenge", __func__);
904 /* Get the challenge, and format the response */
905 challenge = buffer_get_string(&m, NULL);
908 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
909 (*prompts)[0] = challenge;
911 debug3("%s: received challenge: %s", __func__, challenge);
917 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
922 debug3("%s: entering", __func__);
923 if (numresponses != 1)
927 buffer_put_cstring(&m, responses[0]);
928 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
930 mm_request_receive_expect(pmonitor->m_recvfd,
931 MONITOR_ANS_BSDAUTHRESPOND, &m);
933 authok = buffer_get_int(&m);
936 return ((authok == 0) ? -1 : 0);
941 mm_skey_query(void *ctx, char **name, char **infotxt,
942 u_int *numprompts, char ***prompts, u_int **echo_on)
948 debug3("%s: entering", __func__);
951 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
953 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
955 success = buffer_get_int(&m);
957 debug3("%s: no challenge", __func__);
962 /* Get the challenge, and format the response */
963 challenge = buffer_get_string(&m, NULL);
966 debug3("%s: received challenge: %s", __func__, challenge);
968 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
970 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
977 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
982 debug3("%s: entering", __func__);
983 if (numresponses != 1)
987 buffer_put_cstring(&m, responses[0]);
988 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
990 mm_request_receive_expect(pmonitor->m_recvfd,
991 MONITOR_ANS_SKEYRESPOND, &m);
993 authok = buffer_get_int(&m);
996 return ((authok == 0) ? -1 : 0);
1001 mm_ssh1_session_id(u_char session_id[16])
1006 debug3("%s entering", __func__);
1009 for (i = 0; i < 16; i++)
1010 buffer_put_char(&m, session_id[i]);
1012 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1017 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1023 int allowed = 0, have_forced = 0;
1025 debug3("%s entering", __func__);
1028 buffer_put_bignum2(&m, client_n);
1030 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1031 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1033 allowed = buffer_get_int(&m);
1035 /* fake forced command */
1036 auth_clear_options();
1037 have_forced = buffer_get_int(&m);
1038 forced_command = have_forced ? xstrdup("true") : NULL;
1040 if (allowed && rkey != NULL) {
1041 blob = buffer_get_string(&m, &blen);
1042 if ((key = key_from_blob(blob, blen)) == NULL)
1043 fatal("%s: key_from_blob failed", __func__);
1054 mm_auth_rsa_generate_challenge(Key *key)
1061 debug3("%s entering", __func__);
1063 if ((challenge = BN_new()) == NULL)
1064 fatal("%s: BN_new failed", __func__);
1066 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1067 if (key_to_blob(key, &blob, &blen) == 0)
1068 fatal("%s: key_to_blob failed", __func__);
1069 key->type = KEY_RSA1;
1072 buffer_put_string(&m, blob, blen);
1075 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1076 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1078 buffer_get_bignum2(&m, challenge);
1085 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1092 debug3("%s entering", __func__);
1094 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1095 if (key_to_blob(key, &blob, &blen) == 0)
1096 fatal("%s: key_to_blob failed", __func__);
1097 key->type = KEY_RSA1;
1100 buffer_put_string(&m, blob, blen);
1101 buffer_put_string(&m, response, 16);
1104 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1105 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1107 success = buffer_get_int(&m);
1113 #ifdef SSH_AUDIT_EVENTS
1115 mm_audit_event(ssh_audit_event_t event)
1119 debug3("%s entering", __func__);
1122 buffer_put_int(&m, event);
1124 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1129 mm_audit_run_command(const char *command)
1133 debug3("%s entering command %s", __func__, command);
1136 buffer_put_cstring(&m, command);
1138 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1141 #endif /* SSH_AUDIT_EVENTS */
1145 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1150 /* Client doesn't get to see the context */
1154 buffer_put_string(&m, goid->elements, goid->length);
1156 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1157 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1159 major = buffer_get_int(&m);
1166 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1167 gss_buffer_desc *out, OM_uint32 *flags)
1174 buffer_put_string(&m, in->value, in->length);
1176 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1177 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1179 major = buffer_get_int(&m);
1180 out->value = buffer_get_string(&m, &len);
1183 *flags = buffer_get_int(&m);
1191 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1197 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1198 buffer_put_string(&m, gssmic->value, gssmic->length);
1200 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1201 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1204 major = buffer_get_int(&m);
1210 mm_ssh_gssapi_userok(char *user)
1213 int authenticated = 0;
1217 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1218 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1221 authenticated = buffer_get_int(&m);
1224 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1225 return (authenticated);