2 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
3 * Copyright 2002 Markus Friedl <markus@openbsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 RCSID("$OpenBSD: monitor_wrap.c,v 1.39 2004/07/17 05:31:41 dtucker Exp $");
30 #include <openssl/bn.h>
31 #include <openssl/dh.h>
37 #include "auth-options.h"
43 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
46 #define TARGET_OS_MAC 1
51 #include "monitor_wrap.h"
54 #include "monitor_fdpass.h"
68 extern Newkeys *newkeys[];
69 extern z_stream incoming_stream;
70 extern z_stream outgoing_stream;
71 extern struct monitor *pmonitor;
72 extern Buffer input, output;
73 extern Buffer loginmsg;
74 extern ServerOptions options;
75 extern Buffer loginmsg;
81 * m_pid is only set in the privileged part, and
82 * points to the unprivileged child.
84 return (pmonitor && pmonitor->m_pid > 0);
88 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
90 u_int mlen = buffer_len(m);
93 debug3("%s entering: type %d", __func__, type);
95 PUT_32BIT(buf, mlen + 1);
96 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
97 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
98 fatal("%s: write", __func__);
99 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
100 fatal("%s: write", __func__);
104 mm_request_receive(int sock, Buffer *m)
110 debug3("%s entering", __func__);
112 res = atomicio(read, sock, buf, sizeof(buf));
113 if (res != sizeof(buf)) {
116 fatal("%s: read: %ld", __func__, (long)res);
118 msg_len = GET_32BIT(buf);
119 if (msg_len > 256 * 1024)
120 fatal("%s: read: bad msg_len %d", __func__, msg_len);
122 buffer_append_space(m, msg_len);
123 res = atomicio(read, sock, buffer_ptr(m), msg_len);
125 fatal("%s: read: %ld != msg_len", __func__, (long)res);
129 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
133 debug3("%s entering: type %d", __func__, type);
135 mm_request_receive(sock, m);
136 rtype = buffer_get_char(m);
138 fatal("%s: read: rtype %d != type %d", __func__,
143 mm_choose_dh(int min, int nbits, int max)
150 buffer_put_int(&m, min);
151 buffer_put_int(&m, nbits);
152 buffer_put_int(&m, max);
154 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
156 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
157 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
159 success = buffer_get_char(&m);
161 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
163 if ((p = BN_new()) == NULL)
164 fatal("%s: BN_new failed", __func__);
165 if ((g = BN_new()) == NULL)
166 fatal("%s: BN_new failed", __func__);
167 buffer_get_bignum2(&m, p);
168 buffer_get_bignum2(&m, g);
170 debug3("%s: remaining %d", __func__, buffer_len(&m));
173 return (dh_new_group(g, p));
177 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
179 Kex *kex = *pmonitor->m_pkex;
182 debug3("%s entering", __func__);
185 buffer_put_int(&m, kex->host_key_index(key));
186 buffer_put_string(&m, data, datalen);
188 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
190 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
191 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
192 *sigp = buffer_get_string(&m, lenp);
199 mm_getpwnamallow(const char *username)
205 debug3("%s entering", __func__);
208 buffer_put_cstring(&m, username);
210 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
212 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
213 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
215 if (buffer_get_char(&m) == 0) {
219 pw = buffer_get_string(&m, &pwlen);
220 if (pwlen != sizeof(struct passwd))
221 fatal("%s: struct passwd size mismatch", __func__);
222 pw->pw_name = buffer_get_string(&m, NULL);
223 pw->pw_passwd = buffer_get_string(&m, NULL);
224 pw->pw_gecos = buffer_get_string(&m, NULL);
225 #ifdef HAVE_PW_CLASS_IN_PASSWD
226 pw->pw_class = buffer_get_string(&m, NULL);
228 pw->pw_dir = buffer_get_string(&m, NULL);
229 pw->pw_shell = buffer_get_string(&m, NULL);
236 mm_auth2_read_banner(void)
241 debug3("%s entering", __func__);
244 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
247 mm_request_receive_expect(pmonitor->m_recvfd,
248 MONITOR_ANS_AUTH2_READ_BANNER, &m);
249 banner = buffer_get_string(&m, NULL);
252 /* treat empty banner as missing banner */
253 if (strlen(banner) == 0) {
260 /* Inform the privileged process about service and style */
263 mm_inform_authserv(char *service, char *style)
267 debug3("%s entering", __func__);
270 buffer_put_cstring(&m, service);
271 buffer_put_cstring(&m, style ? style : "");
273 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
278 /* Do the password authentication */
280 mm_auth_password(Authctxt *authctxt, char *password)
283 int authenticated = 0;
285 debug3("%s entering", __func__);
288 buffer_put_cstring(&m, password);
289 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
291 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
292 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
294 authenticated = buffer_get_int(&m);
298 debug3("%s: user %sauthenticated",
299 __func__, authenticated ? "" : "not ");
300 return (authenticated);
304 mm_user_key_allowed(struct passwd *pw, Key *key)
306 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
310 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
313 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
317 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
318 char *host, Key *key)
322 key->type = KEY_RSA; /* XXX hack for key_to_blob */
323 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
324 key->type = KEY_RSA1;
329 mm_send_debug(Buffer *m)
333 while (buffer_len(m)) {
334 msg = buffer_get_string(m, NULL);
335 debug3("%s: Sending debug: %s", __func__, msg);
336 packet_send_debug("%s", msg);
342 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
347 int allowed = 0, have_forced = 0;
349 debug3("%s entering", __func__);
351 /* Convert the key to a blob and the pass it over */
352 if (!key_to_blob(key, &blob, &len))
356 buffer_put_int(&m, type);
357 buffer_put_cstring(&m, user ? user : "");
358 buffer_put_cstring(&m, host ? host : "");
359 buffer_put_string(&m, blob, len);
362 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
364 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
365 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
367 allowed = buffer_get_int(&m);
369 /* fake forced command */
370 auth_clear_options();
371 have_forced = buffer_get_int(&m);
372 forced_command = have_forced ? xstrdup("true") : NULL;
374 /* Send potential debug messages */
383 * This key verify needs to send the key type along, because the
384 * privileged parent makes the decision if the key is allowed
385 * for authentication.
389 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
396 debug3("%s entering", __func__);
398 /* Convert the key to a blob and the pass it over */
399 if (!key_to_blob(key, &blob, &len))
403 buffer_put_string(&m, blob, len);
404 buffer_put_string(&m, sig, siglen);
405 buffer_put_string(&m, data, datalen);
408 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
410 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
411 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
413 verified = buffer_get_int(&m);
420 /* Export key state after authentication */
422 mm_newkeys_from_blob(u_char *blob, int blen)
426 Newkeys *newkey = NULL;
431 debug3("%s: %p(%d)", __func__, blob, blen);
433 dump_base64(stderr, blob, blen);
436 buffer_append(&b, blob, blen);
438 newkey = xmalloc(sizeof(*newkey));
441 comp = &newkey->comp;
444 enc->name = buffer_get_string(&b, NULL);
445 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
446 enc->enabled = buffer_get_int(&b);
447 enc->block_size = buffer_get_int(&b);
448 enc->key = buffer_get_string(&b, &enc->key_len);
449 enc->iv = buffer_get_string(&b, &len);
450 if (len != enc->block_size)
451 fatal("%s: bad ivlen: expected %u != %u", __func__,
452 enc->block_size, len);
454 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
455 fatal("%s: bad cipher name %s or pointer %p", __func__,
456 enc->name, enc->cipher);
459 mac->name = buffer_get_string(&b, NULL);
460 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
461 fatal("%s: can not init mac %s", __func__, mac->name);
462 mac->enabled = buffer_get_int(&b);
463 mac->key = buffer_get_string(&b, &len);
464 if (len > mac->key_len)
465 fatal("%s: bad mac key length: %u > %d", __func__, len,
470 comp->type = buffer_get_int(&b);
471 comp->enabled = buffer_get_int(&b);
472 comp->name = buffer_get_string(&b, NULL);
474 len = buffer_len(&b);
476 error("newkeys_from_blob: remaining bytes in blob %u", len);
482 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
489 Newkeys *newkey = newkeys[mode];
491 debug3("%s: converting %p", __func__, newkey);
493 if (newkey == NULL) {
494 error("%s: newkey == NULL", __func__);
499 comp = &newkey->comp;
503 buffer_put_cstring(&b, enc->name);
504 /* The cipher struct is constant and shared, you export pointer */
505 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
506 buffer_put_int(&b, enc->enabled);
507 buffer_put_int(&b, enc->block_size);
508 buffer_put_string(&b, enc->key, enc->key_len);
509 packet_get_keyiv(mode, enc->iv, enc->block_size);
510 buffer_put_string(&b, enc->iv, enc->block_size);
513 buffer_put_cstring(&b, mac->name);
514 buffer_put_int(&b, mac->enabled);
515 buffer_put_string(&b, mac->key, mac->key_len);
518 buffer_put_int(&b, comp->type);
519 buffer_put_int(&b, comp->enabled);
520 buffer_put_cstring(&b, comp->name);
522 len = buffer_len(&b);
526 *blobp = xmalloc(len);
527 memcpy(*blobp, buffer_ptr(&b), len);
529 memset(buffer_ptr(&b), 0, len);
535 mm_send_kex(Buffer *m, Kex *kex)
537 buffer_put_string(m, kex->session_id, kex->session_id_len);
538 buffer_put_int(m, kex->we_need);
539 buffer_put_int(m, kex->hostkey_type);
540 buffer_put_int(m, kex->kex_type);
541 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
542 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
543 buffer_put_int(m, kex->flags);
544 buffer_put_cstring(m, kex->client_version_string);
545 buffer_put_cstring(m, kex->server_version_string);
549 mm_send_keystate(struct monitor *monitor)
554 u_int32_t seqnr, packets;
564 buffer_put_int(&m, packet_get_protocol_flags());
566 buffer_put_int(&m, packet_get_ssh1_cipher());
568 debug3("%s: Sending ssh1 KEY+IV", __func__);
569 keylen = packet_get_encryption_key(NULL);
570 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
571 keylen = packet_get_encryption_key(key);
572 buffer_put_string(&m, key, keylen);
573 memset(key, 0, keylen);
576 ivlen = packet_get_keyiv_len(MODE_OUT);
577 packet_get_keyiv(MODE_OUT, iv, ivlen);
578 buffer_put_string(&m, iv, ivlen);
579 ivlen = packet_get_keyiv_len(MODE_OUT);
580 packet_get_keyiv(MODE_IN, iv, ivlen);
581 buffer_put_string(&m, iv, ivlen);
584 /* Kex for rekeying */
585 mm_send_kex(&m, *monitor->m_pkex);
588 debug3("%s: Sending new keys: %p %p",
589 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
592 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
593 fatal("%s: conversion of newkeys failed", __func__);
595 buffer_put_string(&m, blob, bloblen);
598 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
599 fatal("%s: conversion of newkeys failed", __func__);
601 buffer_put_string(&m, blob, bloblen);
604 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
605 buffer_put_int(&m, seqnr);
606 buffer_put_int64(&m, blocks);
607 buffer_put_int(&m, packets);
608 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
609 buffer_put_int(&m, seqnr);
610 buffer_put_int64(&m, blocks);
611 buffer_put_int(&m, packets);
613 debug3("%s: New keys have been sent", __func__);
615 /* More key context */
616 plen = packet_get_keycontext(MODE_OUT, NULL);
618 packet_get_keycontext(MODE_OUT, p);
619 buffer_put_string(&m, p, plen);
622 plen = packet_get_keycontext(MODE_IN, NULL);
624 packet_get_keycontext(MODE_IN, p);
625 buffer_put_string(&m, p, plen);
628 /* Compression state */
629 debug3("%s: Sending compression state", __func__);
630 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
631 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
633 /* Network I/O buffers */
634 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
635 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
637 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
638 debug3("%s: Finished sending state", __func__);
644 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
651 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
653 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
654 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
656 success = buffer_get_int(&m);
658 debug3("%s: pty alloc failed", __func__);
662 p = buffer_get_string(&m, NULL);
663 msg = buffer_get_string(&m, NULL);
666 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
669 buffer_append(&loginmsg, msg, strlen(msg));
672 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
673 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
680 mm_session_pty_cleanup2(Session *s)
687 buffer_put_cstring(&m, s->tty);
688 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
691 /* closed dup'ed master */
692 if (close(s->ptymaster) < 0)
693 error("close(s->ptymaster): %s", strerror(errno));
695 /* unlink pty from session */
701 mm_start_pam(Authctxt *authctxt)
705 debug3("%s entering", __func__);
706 if (!options.use_pam)
707 fatal("UsePAM=no, but ended up in %s anyway", __func__);
710 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
716 mm_do_pam_account(void)
722 debug3("%s entering", __func__);
723 if (!options.use_pam)
724 fatal("UsePAM=no, but ended up in %s anyway", __func__);
727 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
729 mm_request_receive_expect(pmonitor->m_recvfd,
730 MONITOR_ANS_PAM_ACCOUNT, &m);
731 ret = buffer_get_int(&m);
732 msg = buffer_get_string(&m, NULL);
733 buffer_append(&loginmsg, msg, strlen(msg));
738 debug3("%s returning %d", __func__, ret);
744 mm_sshpam_init_ctx(Authctxt *authctxt)
749 debug3("%s", __func__);
751 buffer_put_cstring(&m, authctxt->user);
752 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
753 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
754 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
755 success = buffer_get_int(&m);
757 debug3("%s: pam_init_ctx failed", __func__);
766 mm_sshpam_query(void *ctx, char **name, char **info,
767 u_int *num, char ***prompts, u_int **echo_on)
772 debug3("%s", __func__);
774 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
775 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
776 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
777 ret = buffer_get_int(&m);
778 debug3("%s: pam_query returned %d", __func__, ret);
779 *name = buffer_get_string(&m, NULL);
780 *info = buffer_get_string(&m, NULL);
781 *num = buffer_get_int(&m);
782 *prompts = xmalloc((*num + 1) * sizeof(char *));
783 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
784 for (i = 0; i < *num; ++i) {
785 (*prompts)[i] = buffer_get_string(&m, NULL);
786 (*echo_on)[i] = buffer_get_int(&m);
793 mm_sshpam_respond(void *ctx, u_int num, char **resp)
798 debug3("%s", __func__);
800 buffer_put_int(&m, num);
801 for (i = 0; i < num; ++i)
802 buffer_put_cstring(&m, resp[i]);
803 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
804 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
805 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
806 ret = buffer_get_int(&m);
807 debug3("%s: pam_respond returned %d", __func__, ret);
813 mm_sshpam_free_ctx(void *ctxtp)
817 debug3("%s", __func__);
819 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
820 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
821 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
826 /* Request process termination */
834 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
839 mm_ssh1_session_key(BIGNUM *num)
845 buffer_put_bignum2(&m, num);
846 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
848 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
850 rsafail = buffer_get_int(&m);
851 buffer_get_bignum2(&m, num);
859 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
860 char ***prompts, u_int **echo_on)
863 *infotxt = xstrdup("");
865 *prompts = xmalloc(*numprompts * sizeof(char *));
866 *echo_on = xmalloc(*numprompts * sizeof(u_int));
871 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
872 u_int *numprompts, char ***prompts, u_int **echo_on)
878 debug3("%s: entering", __func__);
881 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
883 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
885 success = buffer_get_int(&m);
887 debug3("%s: no challenge", __func__);
892 /* Get the challenge, and format the response */
893 challenge = buffer_get_string(&m, NULL);
896 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
897 (*prompts)[0] = challenge;
899 debug3("%s: received challenge: %s", __func__, challenge);
905 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
910 debug3("%s: entering", __func__);
911 if (numresponses != 1)
915 buffer_put_cstring(&m, responses[0]);
916 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
918 mm_request_receive_expect(pmonitor->m_recvfd,
919 MONITOR_ANS_BSDAUTHRESPOND, &m);
921 authok = buffer_get_int(&m);
924 return ((authok == 0) ? -1 : 0);
929 mm_skey_query(void *ctx, char **name, char **infotxt,
930 u_int *numprompts, char ***prompts, u_int **echo_on)
937 debug3("%s: entering", __func__);
940 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
942 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
944 success = buffer_get_int(&m);
946 debug3("%s: no challenge", __func__);
951 /* Get the challenge, and format the response */
952 challenge = buffer_get_string(&m, NULL);
955 debug3("%s: received challenge: %s", __func__, challenge);
957 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
959 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
961 strlcpy(p, challenge, len);
962 strlcat(p, SKEY_PROMPT, len);
970 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
975 debug3("%s: entering", __func__);
976 if (numresponses != 1)
980 buffer_put_cstring(&m, responses[0]);
981 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
983 mm_request_receive_expect(pmonitor->m_recvfd,
984 MONITOR_ANS_SKEYRESPOND, &m);
986 authok = buffer_get_int(&m);
989 return ((authok == 0) ? -1 : 0);
994 mm_ssh1_session_id(u_char session_id[16])
999 debug3("%s entering", __func__);
1002 for (i = 0; i < 16; i++)
1003 buffer_put_char(&m, session_id[i]);
1005 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1010 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1016 int allowed = 0, have_forced = 0;
1018 debug3("%s entering", __func__);
1021 buffer_put_bignum2(&m, client_n);
1023 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1024 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1026 allowed = buffer_get_int(&m);
1028 /* fake forced command */
1029 auth_clear_options();
1030 have_forced = buffer_get_int(&m);
1031 forced_command = have_forced ? xstrdup("true") : NULL;
1033 if (allowed && rkey != NULL) {
1034 blob = buffer_get_string(&m, &blen);
1035 if ((key = key_from_blob(blob, blen)) == NULL)
1036 fatal("%s: key_from_blob failed", __func__);
1047 mm_auth_rsa_generate_challenge(Key *key)
1054 debug3("%s entering", __func__);
1056 if ((challenge = BN_new()) == NULL)
1057 fatal("%s: BN_new failed", __func__);
1059 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1060 if (key_to_blob(key, &blob, &blen) == 0)
1061 fatal("%s: key_to_blob failed", __func__);
1062 key->type = KEY_RSA1;
1065 buffer_put_string(&m, blob, blen);
1068 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1069 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1071 buffer_get_bignum2(&m, challenge);
1078 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1085 debug3("%s entering", __func__);
1087 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1088 if (key_to_blob(key, &blob, &blen) == 0)
1089 fatal("%s: key_to_blob failed", __func__);
1090 key->type = KEY_RSA1;
1093 buffer_put_string(&m, blob, blen);
1094 buffer_put_string(&m, response, 16);
1097 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1098 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1100 success = buffer_get_int(&m);
1106 #ifdef SSH_AUDIT_EVENTS
1108 mm_audit_event(ssh_audit_event_t event)
1112 debug3("%s entering", __func__);
1115 buffer_put_int(&m, event);
1117 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1122 mm_audit_run_command(const char *command)
1126 debug3("%s entering command %s", __func__, command);
1129 buffer_put_cstring(&m, command);
1131 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1134 #endif /* SSH_AUDIT_EVENTS */
1138 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1143 /* Client doesn't get to see the context */
1147 buffer_put_string(&m, goid->elements, goid->length);
1149 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1150 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1152 major = buffer_get_int(&m);
1159 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1160 gss_buffer_desc *out, OM_uint32 *flags)
1167 buffer_put_string(&m, in->value, in->length);
1169 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1170 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1172 major = buffer_get_int(&m);
1173 out->value = buffer_get_string(&m, &len);
1176 *flags = buffer_get_int(&m);
1184 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1190 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1191 buffer_put_string(&m, gssmic->value, gssmic->length);
1193 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1194 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1197 major = buffer_get_int(&m);
1203 mm_ssh_gssapi_userok(char *user)
1206 int authenticated = 0;
1210 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1211 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1214 authenticated = buffer_get_int(&m);
1217 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1218 return (authenticated);