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.
31 #include <sys/types.h>
42 #include <openssl/bn.h>
43 #include <openssl/dh.h>
54 #include "auth-options.h"
58 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
61 #define TARGET_OS_MAC 1
69 #include "monitor_wrap.h"
71 #include "monitor_fdpass.h"
80 extern Newkeys *newkeys[];
81 extern z_stream incoming_stream;
82 extern z_stream outgoing_stream;
83 extern struct monitor *pmonitor;
84 extern Buffer input, output;
85 extern Buffer loginmsg;
86 extern ServerOptions options;
92 * m_pid is only set in the privileged part, and
93 * points to the unprivileged child.
95 return (pmonitor && pmonitor->m_pid > 0);
99 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
101 u_int mlen = buffer_len(m);
104 debug3("%s entering: type %d", __func__, type);
106 put_u32(buf, mlen + 1);
107 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
108 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
109 fatal("%s: write: %s", __func__, strerror(errno));
110 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
111 fatal("%s: write: %s", __func__, strerror(errno));
115 mm_request_receive(int sock, Buffer *m)
120 debug3("%s entering", __func__);
122 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
125 fatal("%s: read: %s", __func__, strerror(errno));
127 msg_len = get_u32(buf);
128 if (msg_len > 256 * 1024)
129 fatal("%s: read: bad msg_len %d", __func__, msg_len);
131 buffer_append_space(m, msg_len);
132 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
133 fatal("%s: read: %s", __func__, strerror(errno));
137 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
141 debug3("%s entering: type %d", __func__, type);
143 mm_request_receive(sock, m);
144 rtype = buffer_get_char(m);
146 fatal("%s: read: rtype %d != type %d", __func__,
151 mm_choose_dh(int min, int nbits, int max)
158 buffer_put_int(&m, min);
159 buffer_put_int(&m, nbits);
160 buffer_put_int(&m, max);
162 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
164 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
165 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
167 success = buffer_get_char(&m);
169 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
171 if ((p = BN_new()) == NULL)
172 fatal("%s: BN_new failed", __func__);
173 if ((g = BN_new()) == NULL)
174 fatal("%s: BN_new failed", __func__);
175 buffer_get_bignum2(&m, p);
176 buffer_get_bignum2(&m, g);
178 debug3("%s: remaining %d", __func__, buffer_len(&m));
181 return (dh_new_group(g, p));
185 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
187 Kex *kex = *pmonitor->m_pkex;
190 debug3("%s entering", __func__);
193 buffer_put_int(&m, kex->host_key_index(key));
194 buffer_put_string(&m, data, datalen);
196 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
198 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
199 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
200 *sigp = buffer_get_string(&m, lenp);
207 mm_getpwnamallow(const char *username)
213 debug3("%s entering", __func__);
216 buffer_put_cstring(&m, username);
218 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
220 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
221 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
223 if (buffer_get_char(&m) == 0) {
227 pw = buffer_get_string(&m, &pwlen);
228 if (pwlen != sizeof(struct passwd))
229 fatal("%s: struct passwd size mismatch", __func__);
230 pw->pw_name = buffer_get_string(&m, NULL);
231 pw->pw_passwd = buffer_get_string(&m, NULL);
232 pw->pw_gecos = buffer_get_string(&m, NULL);
233 #ifdef HAVE_PW_CLASS_IN_PASSWD
234 pw->pw_class = buffer_get_string(&m, NULL);
236 pw->pw_dir = buffer_get_string(&m, NULL);
237 pw->pw_shell = buffer_get_string(&m, NULL);
244 mm_auth2_read_banner(void)
249 debug3("%s entering", __func__);
252 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
255 mm_request_receive_expect(pmonitor->m_recvfd,
256 MONITOR_ANS_AUTH2_READ_BANNER, &m);
257 banner = buffer_get_string(&m, NULL);
260 /* treat empty banner as missing banner */
261 if (strlen(banner) == 0) {
268 /* Inform the privileged process about service and style */
271 mm_inform_authserv(char *service, char *style)
275 debug3("%s entering", __func__);
278 buffer_put_cstring(&m, service);
279 buffer_put_cstring(&m, style ? style : "");
281 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
286 /* Do the password authentication */
288 mm_auth_password(Authctxt *authctxt, char *password)
291 int authenticated = 0;
293 debug3("%s entering", __func__);
296 buffer_put_cstring(&m, password);
297 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
299 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
300 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
302 authenticated = buffer_get_int(&m);
306 debug3("%s: user %sauthenticated",
307 __func__, authenticated ? "" : "not ");
308 return (authenticated);
312 mm_user_key_allowed(struct passwd *pw, Key *key)
314 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
318 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
321 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
325 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
326 char *host, Key *key)
330 key->type = KEY_RSA; /* XXX hack for key_to_blob */
331 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
332 key->type = KEY_RSA1;
337 mm_send_debug(Buffer *m)
341 while (buffer_len(m)) {
342 msg = buffer_get_string(m, NULL);
343 debug3("%s: Sending debug: %s", __func__, msg);
344 packet_send_debug("%s", msg);
350 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
355 int allowed = 0, have_forced = 0;
357 debug3("%s entering", __func__);
359 /* Convert the key to a blob and the pass it over */
360 if (!key_to_blob(key, &blob, &len))
364 buffer_put_int(&m, type);
365 buffer_put_cstring(&m, user ? user : "");
366 buffer_put_cstring(&m, host ? host : "");
367 buffer_put_string(&m, blob, len);
370 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
372 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
373 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
375 allowed = buffer_get_int(&m);
377 /* fake forced command */
378 auth_clear_options();
379 have_forced = buffer_get_int(&m);
380 forced_command = have_forced ? xstrdup("true") : NULL;
382 /* Send potential debug messages */
391 * This key verify needs to send the key type along, because the
392 * privileged parent makes the decision if the key is allowed
393 * for authentication.
397 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
404 debug3("%s entering", __func__);
406 /* Convert the key to a blob and the pass it over */
407 if (!key_to_blob(key, &blob, &len))
411 buffer_put_string(&m, blob, len);
412 buffer_put_string(&m, sig, siglen);
413 buffer_put_string(&m, data, datalen);
416 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
418 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
419 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
421 verified = buffer_get_int(&m);
428 /* Export key state after authentication */
430 mm_newkeys_from_blob(u_char *blob, int blen)
434 Newkeys *newkey = NULL;
439 debug3("%s: %p(%d)", __func__, blob, blen);
441 dump_base64(stderr, blob, blen);
444 buffer_append(&b, blob, blen);
446 newkey = xmalloc(sizeof(*newkey));
449 comp = &newkey->comp;
452 enc->name = buffer_get_string(&b, NULL);
453 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
454 enc->enabled = buffer_get_int(&b);
455 enc->block_size = buffer_get_int(&b);
456 enc->key = buffer_get_string(&b, &enc->key_len);
457 enc->iv = buffer_get_string(&b, &len);
458 if (len != enc->block_size)
459 fatal("%s: bad ivlen: expected %u != %u", __func__,
460 enc->block_size, len);
462 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
463 fatal("%s: bad cipher name %s or pointer %p", __func__,
464 enc->name, enc->cipher);
467 mac->name = buffer_get_string(&b, NULL);
468 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
469 fatal("%s: can not init mac %s", __func__, mac->name);
470 mac->enabled = buffer_get_int(&b);
471 mac->key = buffer_get_string(&b, &len);
472 if (len > mac->key_len)
473 fatal("%s: bad mac key length: %u > %d", __func__, len,
478 comp->type = buffer_get_int(&b);
479 comp->enabled = buffer_get_int(&b);
480 comp->name = buffer_get_string(&b, NULL);
482 len = buffer_len(&b);
484 error("newkeys_from_blob: remaining bytes in blob %u", len);
490 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
497 Newkeys *newkey = newkeys[mode];
499 debug3("%s: converting %p", __func__, newkey);
501 if (newkey == NULL) {
502 error("%s: newkey == NULL", __func__);
507 comp = &newkey->comp;
511 buffer_put_cstring(&b, enc->name);
512 /* The cipher struct is constant and shared, you export pointer */
513 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
514 buffer_put_int(&b, enc->enabled);
515 buffer_put_int(&b, enc->block_size);
516 buffer_put_string(&b, enc->key, enc->key_len);
517 packet_get_keyiv(mode, enc->iv, enc->block_size);
518 buffer_put_string(&b, enc->iv, enc->block_size);
521 buffer_put_cstring(&b, mac->name);
522 buffer_put_int(&b, mac->enabled);
523 buffer_put_string(&b, mac->key, mac->key_len);
526 buffer_put_int(&b, comp->type);
527 buffer_put_int(&b, comp->enabled);
528 buffer_put_cstring(&b, comp->name);
530 len = buffer_len(&b);
534 *blobp = xmalloc(len);
535 memcpy(*blobp, buffer_ptr(&b), len);
537 memset(buffer_ptr(&b), 0, len);
543 mm_send_kex(Buffer *m, Kex *kex)
545 buffer_put_string(m, kex->session_id, kex->session_id_len);
546 buffer_put_int(m, kex->we_need);
547 buffer_put_int(m, kex->hostkey_type);
548 buffer_put_int(m, kex->kex_type);
549 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
550 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
551 buffer_put_int(m, kex->flags);
552 buffer_put_cstring(m, kex->client_version_string);
553 buffer_put_cstring(m, kex->server_version_string);
557 mm_send_keystate(struct monitor *monitor)
562 u_int32_t seqnr, packets;
572 buffer_put_int(&m, packet_get_protocol_flags());
574 buffer_put_int(&m, packet_get_ssh1_cipher());
576 debug3("%s: Sending ssh1 KEY+IV", __func__);
577 keylen = packet_get_encryption_key(NULL);
578 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
579 keylen = packet_get_encryption_key(key);
580 buffer_put_string(&m, key, keylen);
581 memset(key, 0, keylen);
584 ivlen = packet_get_keyiv_len(MODE_OUT);
585 packet_get_keyiv(MODE_OUT, iv, ivlen);
586 buffer_put_string(&m, iv, ivlen);
587 ivlen = packet_get_keyiv_len(MODE_OUT);
588 packet_get_keyiv(MODE_IN, iv, ivlen);
589 buffer_put_string(&m, iv, ivlen);
592 /* Kex for rekeying */
593 mm_send_kex(&m, *monitor->m_pkex);
596 debug3("%s: Sending new keys: %p %p",
597 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
600 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
601 fatal("%s: conversion of newkeys failed", __func__);
603 buffer_put_string(&m, blob, bloblen);
606 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
607 fatal("%s: conversion of newkeys failed", __func__);
609 buffer_put_string(&m, blob, bloblen);
612 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
613 buffer_put_int(&m, seqnr);
614 buffer_put_int64(&m, blocks);
615 buffer_put_int(&m, packets);
616 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
617 buffer_put_int(&m, seqnr);
618 buffer_put_int64(&m, blocks);
619 buffer_put_int(&m, packets);
621 debug3("%s: New keys have been sent", __func__);
623 /* More key context */
624 plen = packet_get_keycontext(MODE_OUT, NULL);
626 packet_get_keycontext(MODE_OUT, p);
627 buffer_put_string(&m, p, plen);
630 plen = packet_get_keycontext(MODE_IN, NULL);
632 packet_get_keycontext(MODE_IN, p);
633 buffer_put_string(&m, p, plen);
636 /* Compression state */
637 debug3("%s: Sending compression state", __func__);
638 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
639 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
641 /* Network I/O buffers */
642 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
643 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
645 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
646 debug3("%s: Finished sending state", __func__);
652 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
659 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
661 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
662 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
664 success = buffer_get_int(&m);
666 debug3("%s: pty alloc failed", __func__);
670 p = buffer_get_string(&m, NULL);
671 msg = buffer_get_string(&m, NULL);
674 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
677 buffer_append(&loginmsg, msg, strlen(msg));
680 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
681 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
688 mm_session_pty_cleanup2(Session *s)
695 buffer_put_cstring(&m, s->tty);
696 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
699 /* closed dup'ed master */
700 if (close(s->ptymaster) < 0)
701 error("close(s->ptymaster): %s", strerror(errno));
703 /* unlink pty from session */
709 mm_start_pam(Authctxt *authctxt)
713 debug3("%s entering", __func__);
714 if (!options.use_pam)
715 fatal("UsePAM=no, but ended up in %s anyway", __func__);
718 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
724 mm_do_pam_account(void)
730 debug3("%s entering", __func__);
731 if (!options.use_pam)
732 fatal("UsePAM=no, but ended up in %s anyway", __func__);
735 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
737 mm_request_receive_expect(pmonitor->m_recvfd,
738 MONITOR_ANS_PAM_ACCOUNT, &m);
739 ret = buffer_get_int(&m);
740 msg = buffer_get_string(&m, NULL);
741 buffer_append(&loginmsg, msg, strlen(msg));
746 debug3("%s returning %d", __func__, ret);
752 mm_sshpam_init_ctx(Authctxt *authctxt)
757 debug3("%s", __func__);
759 buffer_put_cstring(&m, authctxt->user);
760 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
761 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
762 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
763 success = buffer_get_int(&m);
765 debug3("%s: pam_init_ctx failed", __func__);
774 mm_sshpam_query(void *ctx, char **name, char **info,
775 u_int *num, char ***prompts, u_int **echo_on)
781 debug3("%s", __func__);
783 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
784 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
785 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
786 ret = buffer_get_int(&m);
787 debug3("%s: pam_query returned %d", __func__, ret);
788 *name = buffer_get_string(&m, NULL);
789 *info = buffer_get_string(&m, NULL);
790 *num = buffer_get_int(&m);
791 if (*num > PAM_MAX_NUM_MSG)
792 fatal("%s: recieved %u PAM messages, expected <= %u",
793 __func__, *num, PAM_MAX_NUM_MSG);
794 *prompts = xcalloc((*num + 1), sizeof(char *));
795 *echo_on = xcalloc((*num + 1), sizeof(u_int));
796 for (i = 0; i < *num; ++i) {
797 (*prompts)[i] = buffer_get_string(&m, NULL);
798 (*echo_on)[i] = buffer_get_int(&m);
805 mm_sshpam_respond(void *ctx, u_int num, char **resp)
811 debug3("%s", __func__);
813 buffer_put_int(&m, num);
814 for (i = 0; i < num; ++i)
815 buffer_put_cstring(&m, resp[i]);
816 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
817 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
818 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
819 ret = buffer_get_int(&m);
820 debug3("%s: pam_respond returned %d", __func__, ret);
826 mm_sshpam_free_ctx(void *ctxtp)
830 debug3("%s", __func__);
832 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
833 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
834 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
839 /* Request process termination */
847 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
852 mm_ssh1_session_key(BIGNUM *num)
858 buffer_put_bignum2(&m, num);
859 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
861 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
863 rsafail = buffer_get_int(&m);
864 buffer_get_bignum2(&m, num);
872 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
873 char ***prompts, u_int **echo_on)
876 *infotxt = xstrdup("");
878 *prompts = xcalloc(*numprompts, sizeof(char *));
879 *echo_on = xcalloc(*numprompts, sizeof(u_int));
884 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
885 u_int *numprompts, char ***prompts, u_int **echo_on)
891 debug3("%s: entering", __func__);
894 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
896 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
898 success = buffer_get_int(&m);
900 debug3("%s: no challenge", __func__);
905 /* Get the challenge, and format the response */
906 challenge = buffer_get_string(&m, NULL);
909 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
910 (*prompts)[0] = challenge;
912 debug3("%s: received challenge: %s", __func__, challenge);
918 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
923 debug3("%s: entering", __func__);
924 if (numresponses != 1)
928 buffer_put_cstring(&m, responses[0]);
929 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
931 mm_request_receive_expect(pmonitor->m_recvfd,
932 MONITOR_ANS_BSDAUTHRESPOND, &m);
934 authok = buffer_get_int(&m);
937 return ((authok == 0) ? -1 : 0);
942 mm_skey_query(void *ctx, char **name, char **infotxt,
943 u_int *numprompts, char ***prompts, u_int **echo_on)
949 debug3("%s: entering", __func__);
952 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
954 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
956 success = buffer_get_int(&m);
958 debug3("%s: no challenge", __func__);
963 /* Get the challenge, and format the response */
964 challenge = buffer_get_string(&m, NULL);
967 debug3("%s: received challenge: %s", __func__, challenge);
969 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
971 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
978 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
983 debug3("%s: entering", __func__);
984 if (numresponses != 1)
988 buffer_put_cstring(&m, responses[0]);
989 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
991 mm_request_receive_expect(pmonitor->m_recvfd,
992 MONITOR_ANS_SKEYRESPOND, &m);
994 authok = buffer_get_int(&m);
997 return ((authok == 0) ? -1 : 0);
1002 mm_ssh1_session_id(u_char session_id[16])
1007 debug3("%s entering", __func__);
1010 for (i = 0; i < 16; i++)
1011 buffer_put_char(&m, session_id[i]);
1013 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1018 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1024 int allowed = 0, have_forced = 0;
1026 debug3("%s entering", __func__);
1029 buffer_put_bignum2(&m, client_n);
1031 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1032 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1034 allowed = buffer_get_int(&m);
1036 /* fake forced command */
1037 auth_clear_options();
1038 have_forced = buffer_get_int(&m);
1039 forced_command = have_forced ? xstrdup("true") : NULL;
1041 if (allowed && rkey != NULL) {
1042 blob = buffer_get_string(&m, &blen);
1043 if ((key = key_from_blob(blob, blen)) == NULL)
1044 fatal("%s: key_from_blob failed", __func__);
1055 mm_auth_rsa_generate_challenge(Key *key)
1062 debug3("%s entering", __func__);
1064 if ((challenge = BN_new()) == NULL)
1065 fatal("%s: BN_new failed", __func__);
1067 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1068 if (key_to_blob(key, &blob, &blen) == 0)
1069 fatal("%s: key_to_blob failed", __func__);
1070 key->type = KEY_RSA1;
1073 buffer_put_string(&m, blob, blen);
1076 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1077 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1079 buffer_get_bignum2(&m, challenge);
1086 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1093 debug3("%s entering", __func__);
1095 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1096 if (key_to_blob(key, &blob, &blen) == 0)
1097 fatal("%s: key_to_blob failed", __func__);
1098 key->type = KEY_RSA1;
1101 buffer_put_string(&m, blob, blen);
1102 buffer_put_string(&m, response, 16);
1105 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1106 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1108 success = buffer_get_int(&m);
1114 #ifdef SSH_AUDIT_EVENTS
1116 mm_audit_event(ssh_audit_event_t event)
1120 debug3("%s entering", __func__);
1123 buffer_put_int(&m, event);
1125 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1130 mm_audit_run_command(const char *command)
1134 debug3("%s entering command %s", __func__, command);
1137 buffer_put_cstring(&m, command);
1139 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1142 #endif /* SSH_AUDIT_EVENTS */
1146 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1151 /* Client doesn't get to see the context */
1155 buffer_put_string(&m, goid->elements, goid->length);
1157 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1158 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1160 major = buffer_get_int(&m);
1167 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1168 gss_buffer_desc *out, OM_uint32 *flags)
1175 buffer_put_string(&m, in->value, in->length);
1177 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1178 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1180 major = buffer_get_int(&m);
1181 out->value = buffer_get_string(&m, &len);
1184 *flags = buffer_get_int(&m);
1192 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1198 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1199 buffer_put_string(&m, gssmic->value, gssmic->length);
1201 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1202 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1205 major = buffer_get_int(&m);
1211 mm_ssh_gssapi_userok(char *user)
1214 int authenticated = 0;
1218 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1219 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1222 authenticated = buffer_get_int(&m);
1225 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1226 return (authenticated);