1 /* $OpenBSD: monitor_wrap.c,v 1.65 2009/03/05 07:18:19 djm 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>
43 #include <openssl/evp.h>
45 #include "openbsd-compat/sys-queue.h"
55 #include "auth-options.h"
59 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
62 #define TARGET_OS_MAC 1
70 #include "monitor_wrap.h"
72 #include "monitor_fdpass.h"
83 extern Newkeys *newkeys[];
84 extern z_stream incoming_stream;
85 extern z_stream outgoing_stream;
86 extern struct monitor *pmonitor;
87 extern Buffer input, output;
88 extern Buffer loginmsg;
89 extern ServerOptions options;
95 * m_pid is only set in the privileged part, and
96 * points to the unprivileged child.
98 return (pmonitor && pmonitor->m_pid > 0);
102 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
104 u_int mlen = buffer_len(m);
107 debug3("%s entering: type %d", __func__, type);
109 put_u32(buf, mlen + 1);
110 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
111 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
112 fatal("%s: write: %s", __func__, strerror(errno));
113 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
114 fatal("%s: write: %s", __func__, strerror(errno));
118 mm_request_receive(int sock, Buffer *m)
123 debug3("%s entering", __func__);
125 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
128 fatal("%s: read: %s", __func__, strerror(errno));
130 msg_len = get_u32(buf);
131 if (msg_len > 256 * 1024)
132 fatal("%s: read: bad msg_len %d", __func__, msg_len);
134 buffer_append_space(m, msg_len);
135 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
136 fatal("%s: read: %s", __func__, strerror(errno));
140 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
144 debug3("%s entering: type %d", __func__, type);
146 mm_request_receive(sock, m);
147 rtype = buffer_get_char(m);
149 fatal("%s: read: rtype %d != type %d", __func__,
154 mm_choose_dh(int min, int nbits, int max)
161 buffer_put_int(&m, min);
162 buffer_put_int(&m, nbits);
163 buffer_put_int(&m, max);
165 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
167 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
168 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
170 success = buffer_get_char(&m);
172 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
174 if ((p = BN_new()) == NULL)
175 fatal("%s: BN_new failed", __func__);
176 if ((g = BN_new()) == NULL)
177 fatal("%s: BN_new failed", __func__);
178 buffer_get_bignum2(&m, p);
179 buffer_get_bignum2(&m, g);
181 debug3("%s: remaining %d", __func__, buffer_len(&m));
184 return (dh_new_group(g, p));
188 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
190 Kex *kex = *pmonitor->m_pkex;
193 debug3("%s entering", __func__);
196 buffer_put_int(&m, kex->host_key_index(key));
197 buffer_put_string(&m, data, datalen);
199 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
201 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
202 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
203 *sigp = buffer_get_string(&m, lenp);
210 mm_getpwnamallow(const char *username)
215 ServerOptions *newopts;
217 debug3("%s entering", __func__);
220 buffer_put_cstring(&m, username);
222 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
224 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
225 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
227 if (buffer_get_char(&m) == 0) {
231 pw = buffer_get_string(&m, &len);
232 if (len != sizeof(struct passwd))
233 fatal("%s: struct passwd size mismatch", __func__);
234 pw->pw_name = buffer_get_string(&m, NULL);
235 pw->pw_passwd = buffer_get_string(&m, NULL);
236 pw->pw_gecos = buffer_get_string(&m, NULL);
237 #ifdef HAVE_PW_CLASS_IN_PASSWD
238 pw->pw_class = buffer_get_string(&m, NULL);
240 pw->pw_dir = buffer_get_string(&m, NULL);
241 pw->pw_shell = buffer_get_string(&m, NULL);
244 /* copy options block as a Match directive may have changed some */
245 newopts = buffer_get_string(&m, &len);
246 if (len != sizeof(*newopts))
247 fatal("%s: option block size mismatch", __func__);
248 if (newopts->banner != NULL)
249 newopts->banner = buffer_get_string(&m, NULL);
250 copy_set_server_options(&options, newopts, 1);
259 mm_auth2_read_banner(void)
264 debug3("%s entering", __func__);
267 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
270 mm_request_receive_expect(pmonitor->m_recvfd,
271 MONITOR_ANS_AUTH2_READ_BANNER, &m);
272 banner = buffer_get_string(&m, NULL);
275 /* treat empty banner as missing banner */
276 if (strlen(banner) == 0) {
283 /* Inform the privileged process about service and style */
286 mm_inform_authserv(char *service, char *style)
290 debug3("%s entering", __func__);
293 buffer_put_cstring(&m, service);
294 buffer_put_cstring(&m, style ? style : "");
296 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
301 /* Do the password authentication */
303 mm_auth_password(Authctxt *authctxt, char *password)
306 int authenticated = 0;
308 debug3("%s entering", __func__);
311 buffer_put_cstring(&m, password);
312 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
314 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
315 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
317 authenticated = buffer_get_int(&m);
321 debug3("%s: user %sauthenticated",
322 __func__, authenticated ? "" : "not ");
323 return (authenticated);
327 mm_user_key_allowed(struct passwd *pw, Key *key)
329 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
333 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
336 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
340 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
341 char *host, Key *key)
345 key->type = KEY_RSA; /* XXX hack for key_to_blob */
346 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
347 key->type = KEY_RSA1;
352 mm_send_debug(Buffer *m)
356 while (buffer_len(m)) {
357 msg = buffer_get_string(m, NULL);
358 debug3("%s: Sending debug: %s", __func__, msg);
359 packet_send_debug("%s", msg);
365 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
370 int allowed = 0, have_forced = 0;
372 debug3("%s entering", __func__);
374 /* Convert the key to a blob and the pass it over */
375 if (!key_to_blob(key, &blob, &len))
379 buffer_put_int(&m, type);
380 buffer_put_cstring(&m, user ? user : "");
381 buffer_put_cstring(&m, host ? host : "");
382 buffer_put_string(&m, blob, len);
385 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
387 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
388 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
390 allowed = buffer_get_int(&m);
392 /* fake forced command */
393 auth_clear_options();
394 have_forced = buffer_get_int(&m);
395 forced_command = have_forced ? xstrdup("true") : NULL;
397 /* Send potential debug messages */
406 * This key verify needs to send the key type along, because the
407 * privileged parent makes the decision if the key is allowed
408 * for authentication.
412 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
419 debug3("%s entering", __func__);
421 /* Convert the key to a blob and the pass it over */
422 if (!key_to_blob(key, &blob, &len))
426 buffer_put_string(&m, blob, len);
427 buffer_put_string(&m, sig, siglen);
428 buffer_put_string(&m, data, datalen);
431 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
433 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
434 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
436 verified = buffer_get_int(&m);
443 /* Export key state after authentication */
445 mm_newkeys_from_blob(u_char *blob, int blen)
449 Newkeys *newkey = NULL;
454 debug3("%s: %p(%d)", __func__, blob, blen);
456 dump_base64(stderr, blob, blen);
459 buffer_append(&b, blob, blen);
461 newkey = xmalloc(sizeof(*newkey));
464 comp = &newkey->comp;
467 enc->name = buffer_get_string(&b, NULL);
468 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
469 enc->enabled = buffer_get_int(&b);
470 enc->block_size = buffer_get_int(&b);
471 enc->key = buffer_get_string(&b, &enc->key_len);
472 enc->iv = buffer_get_string(&b, &len);
473 if (len != enc->block_size)
474 fatal("%s: bad ivlen: expected %u != %u", __func__,
475 enc->block_size, len);
477 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
478 fatal("%s: bad cipher name %s or pointer %p", __func__,
479 enc->name, enc->cipher);
482 mac->name = buffer_get_string(&b, NULL);
483 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
484 fatal("%s: can not setup mac %s", __func__, mac->name);
485 mac->enabled = buffer_get_int(&b);
486 mac->key = buffer_get_string(&b, &len);
487 if (len > mac->key_len)
488 fatal("%s: bad mac key length: %u > %d", __func__, len,
493 comp->type = buffer_get_int(&b);
494 comp->enabled = buffer_get_int(&b);
495 comp->name = buffer_get_string(&b, NULL);
497 len = buffer_len(&b);
499 error("newkeys_from_blob: remaining bytes in blob %u", len);
505 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
512 Newkeys *newkey = newkeys[mode];
514 debug3("%s: converting %p", __func__, newkey);
516 if (newkey == NULL) {
517 error("%s: newkey == NULL", __func__);
522 comp = &newkey->comp;
526 buffer_put_cstring(&b, enc->name);
527 /* The cipher struct is constant and shared, you export pointer */
528 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
529 buffer_put_int(&b, enc->enabled);
530 buffer_put_int(&b, enc->block_size);
531 buffer_put_string(&b, enc->key, enc->key_len);
532 packet_get_keyiv(mode, enc->iv, enc->block_size);
533 buffer_put_string(&b, enc->iv, enc->block_size);
536 buffer_put_cstring(&b, mac->name);
537 buffer_put_int(&b, mac->enabled);
538 buffer_put_string(&b, mac->key, mac->key_len);
541 buffer_put_int(&b, comp->type);
542 buffer_put_int(&b, comp->enabled);
543 buffer_put_cstring(&b, comp->name);
545 len = buffer_len(&b);
549 *blobp = xmalloc(len);
550 memcpy(*blobp, buffer_ptr(&b), len);
552 memset(buffer_ptr(&b), 0, len);
558 mm_send_kex(Buffer *m, Kex *kex)
560 buffer_put_string(m, kex->session_id, kex->session_id_len);
561 buffer_put_int(m, kex->we_need);
562 buffer_put_int(m, kex->hostkey_type);
563 buffer_put_int(m, kex->kex_type);
564 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
565 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
566 buffer_put_int(m, kex->flags);
567 buffer_put_cstring(m, kex->client_version_string);
568 buffer_put_cstring(m, kex->server_version_string);
572 mm_send_keystate(struct monitor *monitor)
577 u_int32_t seqnr, packets;
578 u_int64_t blocks, bytes;
587 buffer_put_int(&m, packet_get_protocol_flags());
589 buffer_put_int(&m, packet_get_ssh1_cipher());
591 debug3("%s: Sending ssh1 KEY+IV", __func__);
592 keylen = packet_get_encryption_key(NULL);
593 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
594 keylen = packet_get_encryption_key(key);
595 buffer_put_string(&m, key, keylen);
596 memset(key, 0, keylen);
599 ivlen = packet_get_keyiv_len(MODE_OUT);
600 packet_get_keyiv(MODE_OUT, iv, ivlen);
601 buffer_put_string(&m, iv, ivlen);
602 ivlen = packet_get_keyiv_len(MODE_OUT);
603 packet_get_keyiv(MODE_IN, iv, ivlen);
604 buffer_put_string(&m, iv, ivlen);
607 /* Kex for rekeying */
608 mm_send_kex(&m, *monitor->m_pkex);
611 debug3("%s: Sending new keys: %p %p",
612 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
615 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
616 fatal("%s: conversion of newkeys failed", __func__);
618 buffer_put_string(&m, blob, bloblen);
621 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
622 fatal("%s: conversion of newkeys failed", __func__);
624 buffer_put_string(&m, blob, bloblen);
627 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
628 buffer_put_int(&m, seqnr);
629 buffer_put_int64(&m, blocks);
630 buffer_put_int(&m, packets);
631 buffer_put_int64(&m, bytes);
632 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
633 buffer_put_int(&m, seqnr);
634 buffer_put_int64(&m, blocks);
635 buffer_put_int(&m, packets);
636 buffer_put_int64(&m, bytes);
638 debug3("%s: New keys have been sent", __func__);
640 /* More key context */
641 plen = packet_get_keycontext(MODE_OUT, NULL);
643 packet_get_keycontext(MODE_OUT, p);
644 buffer_put_string(&m, p, plen);
647 plen = packet_get_keycontext(MODE_IN, NULL);
649 packet_get_keycontext(MODE_IN, p);
650 buffer_put_string(&m, p, plen);
653 /* Compression state */
654 debug3("%s: Sending compression state", __func__);
655 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
656 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
658 /* Network I/O buffers */
659 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
660 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
662 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
663 debug3("%s: Finished sending state", __func__);
669 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
673 int success = 0, tmp1 = -1, tmp2 = -1;
675 /* Kludge: ensure there are fds free to receive the pty/tty */
676 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
677 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
678 error("%s: cannot allocate fds for pty", __func__);
689 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
691 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
692 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
694 success = buffer_get_int(&m);
696 debug3("%s: pty alloc failed", __func__);
700 p = buffer_get_string(&m, NULL);
701 msg = buffer_get_string(&m, NULL);
704 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
707 buffer_append(&loginmsg, msg, strlen(msg));
710 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
711 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
712 fatal("%s: receive fds failed", __func__);
719 mm_session_pty_cleanup2(Session *s)
726 buffer_put_cstring(&m, s->tty);
727 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
730 /* closed dup'ed master */
731 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
732 error("close(s->ptymaster/%d): %s",
733 s->ptymaster, strerror(errno));
735 /* unlink pty from session */
741 mm_start_pam(Authctxt *authctxt)
745 debug3("%s entering", __func__);
746 if (!options.use_pam)
747 fatal("UsePAM=no, but ended up in %s anyway", __func__);
750 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
756 mm_do_pam_account(void)
762 debug3("%s entering", __func__);
763 if (!options.use_pam)
764 fatal("UsePAM=no, but ended up in %s anyway", __func__);
767 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
769 mm_request_receive_expect(pmonitor->m_recvfd,
770 MONITOR_ANS_PAM_ACCOUNT, &m);
771 ret = buffer_get_int(&m);
772 msg = buffer_get_string(&m, NULL);
773 buffer_append(&loginmsg, msg, strlen(msg));
778 debug3("%s returning %d", __func__, ret);
784 mm_sshpam_init_ctx(Authctxt *authctxt)
789 debug3("%s", __func__);
791 buffer_put_cstring(&m, authctxt->user);
792 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
793 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
794 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
795 success = buffer_get_int(&m);
797 debug3("%s: pam_init_ctx failed", __func__);
806 mm_sshpam_query(void *ctx, char **name, char **info,
807 u_int *num, char ***prompts, u_int **echo_on)
813 debug3("%s", __func__);
815 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
816 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
817 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
818 ret = buffer_get_int(&m);
819 debug3("%s: pam_query returned %d", __func__, ret);
820 *name = buffer_get_string(&m, NULL);
821 *info = buffer_get_string(&m, NULL);
822 *num = buffer_get_int(&m);
823 if (*num > PAM_MAX_NUM_MSG)
824 fatal("%s: recieved %u PAM messages, expected <= %u",
825 __func__, *num, PAM_MAX_NUM_MSG);
826 *prompts = xcalloc((*num + 1), sizeof(char *));
827 *echo_on = xcalloc((*num + 1), sizeof(u_int));
828 for (i = 0; i < *num; ++i) {
829 (*prompts)[i] = buffer_get_string(&m, NULL);
830 (*echo_on)[i] = buffer_get_int(&m);
837 mm_sshpam_respond(void *ctx, u_int num, char **resp)
843 debug3("%s", __func__);
845 buffer_put_int(&m, num);
846 for (i = 0; i < num; ++i)
847 buffer_put_cstring(&m, resp[i]);
848 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
849 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
850 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
851 ret = buffer_get_int(&m);
852 debug3("%s: pam_respond returned %d", __func__, ret);
858 mm_sshpam_free_ctx(void *ctxtp)
862 debug3("%s", __func__);
864 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
865 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
866 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
871 /* Request process termination */
879 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
884 mm_ssh1_session_key(BIGNUM *num)
890 buffer_put_bignum2(&m, num);
891 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
893 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
895 rsafail = buffer_get_int(&m);
896 buffer_get_bignum2(&m, num);
904 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
905 char ***prompts, u_int **echo_on)
908 *infotxt = xstrdup("");
910 *prompts = xcalloc(*numprompts, sizeof(char *));
911 *echo_on = xcalloc(*numprompts, sizeof(u_int));
916 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
917 u_int *numprompts, char ***prompts, u_int **echo_on)
923 debug3("%s: entering", __func__);
926 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
928 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
930 success = buffer_get_int(&m);
932 debug3("%s: no challenge", __func__);
937 /* Get the challenge, and format the response */
938 challenge = buffer_get_string(&m, NULL);
941 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
942 (*prompts)[0] = challenge;
944 debug3("%s: received challenge: %s", __func__, challenge);
950 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
955 debug3("%s: entering", __func__);
956 if (numresponses != 1)
960 buffer_put_cstring(&m, responses[0]);
961 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
963 mm_request_receive_expect(pmonitor->m_recvfd,
964 MONITOR_ANS_BSDAUTHRESPOND, &m);
966 authok = buffer_get_int(&m);
969 return ((authok == 0) ? -1 : 0);
974 mm_skey_query(void *ctx, char **name, char **infotxt,
975 u_int *numprompts, char ***prompts, u_int **echo_on)
981 debug3("%s: entering", __func__);
984 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
986 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
988 success = buffer_get_int(&m);
990 debug3("%s: no challenge", __func__);
995 /* Get the challenge, and format the response */
996 challenge = buffer_get_string(&m, NULL);
999 debug3("%s: received challenge: %s", __func__, challenge);
1001 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1003 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1010 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1015 debug3("%s: entering", __func__);
1016 if (numresponses != 1)
1020 buffer_put_cstring(&m, responses[0]);
1021 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1023 mm_request_receive_expect(pmonitor->m_recvfd,
1024 MONITOR_ANS_SKEYRESPOND, &m);
1026 authok = buffer_get_int(&m);
1029 return ((authok == 0) ? -1 : 0);
1034 mm_ssh1_session_id(u_char session_id[16])
1039 debug3("%s entering", __func__);
1042 for (i = 0; i < 16; i++)
1043 buffer_put_char(&m, session_id[i]);
1045 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1050 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1056 int allowed = 0, have_forced = 0;
1058 debug3("%s entering", __func__);
1061 buffer_put_bignum2(&m, client_n);
1063 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1064 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1066 allowed = buffer_get_int(&m);
1068 /* fake forced command */
1069 auth_clear_options();
1070 have_forced = buffer_get_int(&m);
1071 forced_command = have_forced ? xstrdup("true") : NULL;
1073 if (allowed && rkey != NULL) {
1074 blob = buffer_get_string(&m, &blen);
1075 if ((key = key_from_blob(blob, blen)) == NULL)
1076 fatal("%s: key_from_blob failed", __func__);
1087 mm_auth_rsa_generate_challenge(Key *key)
1094 debug3("%s entering", __func__);
1096 if ((challenge = BN_new()) == NULL)
1097 fatal("%s: BN_new failed", __func__);
1099 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1100 if (key_to_blob(key, &blob, &blen) == 0)
1101 fatal("%s: key_to_blob failed", __func__);
1102 key->type = KEY_RSA1;
1105 buffer_put_string(&m, blob, blen);
1108 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1109 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1111 buffer_get_bignum2(&m, challenge);
1118 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1125 debug3("%s entering", __func__);
1127 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1128 if (key_to_blob(key, &blob, &blen) == 0)
1129 fatal("%s: key_to_blob failed", __func__);
1130 key->type = KEY_RSA1;
1133 buffer_put_string(&m, blob, blen);
1134 buffer_put_string(&m, response, 16);
1137 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1138 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1140 success = buffer_get_int(&m);
1146 #ifdef SSH_AUDIT_EVENTS
1148 mm_audit_event(ssh_audit_event_t event)
1152 debug3("%s entering", __func__);
1155 buffer_put_int(&m, event);
1157 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1162 mm_audit_run_command(const char *command)
1166 debug3("%s entering command %s", __func__, command);
1169 buffer_put_cstring(&m, command);
1171 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1174 #endif /* SSH_AUDIT_EVENTS */
1178 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1183 /* Client doesn't get to see the context */
1187 buffer_put_string(&m, goid->elements, goid->length);
1189 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1190 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1192 major = buffer_get_int(&m);
1199 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1200 gss_buffer_desc *out, OM_uint32 *flags)
1207 buffer_put_string(&m, in->value, in->length);
1209 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1210 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1212 major = buffer_get_int(&m);
1213 out->value = buffer_get_string(&m, &len);
1216 *flags = buffer_get_int(&m);
1224 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1230 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1231 buffer_put_string(&m, gssmic->value, gssmic->length);
1233 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1234 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1237 major = buffer_get_int(&m);
1243 mm_ssh_gssapi_userok(char *user)
1246 int authenticated = 0;
1250 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1251 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1254 authenticated = buffer_get_int(&m);
1257 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1258 return (authenticated);
1264 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1265 char **hash_scheme, char **salt)
1269 debug3("%s entering", __func__);
1272 mm_request_send(pmonitor->m_recvfd,
1273 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1275 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1276 mm_request_receive_expect(pmonitor->m_recvfd,
1277 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1279 *hash_scheme = buffer_get_string(&m, NULL);
1280 *salt = buffer_get_string(&m, NULL);
1286 mm_jpake_step1(struct modp_group *grp,
1287 u_char **id, u_int *id_len,
1288 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1289 u_char **priv1_proof, u_int *priv1_proof_len,
1290 u_char **priv2_proof, u_int *priv2_proof_len)
1294 debug3("%s entering", __func__);
1297 mm_request_send(pmonitor->m_recvfd,
1298 MONITOR_REQ_JPAKE_STEP1, &m);
1300 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1301 mm_request_receive_expect(pmonitor->m_recvfd,
1302 MONITOR_ANS_JPAKE_STEP1, &m);
1304 if ((*priv1 = BN_new()) == NULL ||
1305 (*priv2 = BN_new()) == NULL ||
1306 (*g_priv1 = BN_new()) == NULL ||
1307 (*g_priv2 = BN_new()) == NULL)
1308 fatal("%s: BN_new", __func__);
1310 *id = buffer_get_string(&m, id_len);
1311 /* priv1 and priv2 are, well, private */
1312 buffer_get_bignum2(&m, *g_priv1);
1313 buffer_get_bignum2(&m, *g_priv2);
1314 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1315 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1321 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1322 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1323 const u_char *theirid, u_int theirid_len,
1324 const u_char *myid, u_int myid_len,
1325 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1326 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1328 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1332 debug3("%s entering", __func__);
1335 /* monitor already has all bignums except theirpub1, theirpub2 */
1336 buffer_put_bignum2(&m, theirpub1);
1337 buffer_put_bignum2(&m, theirpub2);
1338 /* monitor already knows our id */
1339 buffer_put_string(&m, theirid, theirid_len);
1340 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1341 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1343 mm_request_send(pmonitor->m_recvfd,
1344 MONITOR_REQ_JPAKE_STEP2, &m);
1346 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1347 mm_request_receive_expect(pmonitor->m_recvfd,
1348 MONITOR_ANS_JPAKE_STEP2, &m);
1350 if ((*newpub = BN_new()) == NULL)
1351 fatal("%s: BN_new", __func__);
1353 buffer_get_bignum2(&m, *newpub);
1354 *newpub_exponent_proof = buffer_get_string(&m,
1355 newpub_exponent_proof_len);
1361 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1362 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1363 BIGNUM *theirpub1, BIGNUM *theirpub2,
1364 const u_char *my_id, u_int my_id_len,
1365 const u_char *their_id, u_int their_id_len,
1366 const u_char *sess_id, u_int sess_id_len,
1367 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1369 u_char **confirm_hash, u_int *confirm_hash_len)
1373 debug3("%s entering", __func__);
1376 /* monitor already has all bignums except step2_val */
1377 buffer_put_bignum2(&m, step2_val);
1378 /* monitor already knows all the ids */
1379 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1381 mm_request_send(pmonitor->m_recvfd,
1382 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1384 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1385 mm_request_receive_expect(pmonitor->m_recvfd,
1386 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1388 /* 'k' is sensitive and stays in the monitor */
1389 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1395 mm_jpake_check_confirm(const BIGNUM *k,
1396 const u_char *peer_id, u_int peer_id_len,
1397 const u_char *sess_id, u_int sess_id_len,
1398 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1403 debug3("%s entering", __func__);
1406 /* k is dummy in slave, ignored */
1407 /* monitor knows all the ids */
1408 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1409 mm_request_send(pmonitor->m_recvfd,
1410 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1412 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1413 mm_request_receive_expect(pmonitor->m_recvfd,
1414 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1416 success = buffer_get_int(&m);
1419 debug3("%s: success = %d", __func__, success);