1 /* $OpenBSD: monitor_wrap.c,v 1.75 2013/01/08 18:49:04 markus 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"
85 extern z_stream incoming_stream;
86 extern z_stream outgoing_stream;
87 extern struct monitor *pmonitor;
88 extern Buffer loginmsg;
89 extern ServerOptions options;
92 mm_log_handler(LogLevel level, const char *msg, void *ctx)
95 struct monitor *mon = (struct monitor *)ctx;
97 if (mon->m_log_sendfd == -1)
98 fatal("%s: no log channel", __func__);
100 buffer_init(&log_msg);
102 * Placeholder for packet length. Will be filled in with the actual
103 * packet length once the packet has been constucted. This saves
106 buffer_put_int(&log_msg, 0);
108 buffer_put_int(&log_msg, level);
109 buffer_put_cstring(&log_msg, msg);
110 put_u32(buffer_ptr(&log_msg), buffer_len(&log_msg) - 4);
111 if (atomicio(vwrite, mon->m_log_sendfd, buffer_ptr(&log_msg),
112 buffer_len(&log_msg)) != buffer_len(&log_msg))
113 fatal("%s: write: %s", __func__, strerror(errno));
114 buffer_free(&log_msg);
121 * m_pid is only set in the privileged part, and
122 * points to the unprivileged child.
124 return (pmonitor && pmonitor->m_pid > 0);
128 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
130 u_int mlen = buffer_len(m);
133 debug3("%s entering: type %d", __func__, type);
135 put_u32(buf, mlen + 1);
136 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
137 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
138 fatal("%s: write: %s", __func__, strerror(errno));
139 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
140 fatal("%s: write: %s", __func__, strerror(errno));
144 mm_request_receive(int sock, Buffer *m)
149 debug3("%s entering", __func__);
151 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
154 fatal("%s: read: %s", __func__, strerror(errno));
156 msg_len = get_u32(buf);
157 if (msg_len > 256 * 1024)
158 fatal("%s: read: bad msg_len %d", __func__, msg_len);
160 buffer_append_space(m, msg_len);
161 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
162 fatal("%s: read: %s", __func__, strerror(errno));
166 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
170 debug3("%s entering: type %d", __func__, type);
172 mm_request_receive(sock, m);
173 rtype = buffer_get_char(m);
175 fatal("%s: read: rtype %d != type %d", __func__,
180 mm_choose_dh(int min, int nbits, int max)
187 buffer_put_int(&m, min);
188 buffer_put_int(&m, nbits);
189 buffer_put_int(&m, max);
191 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
193 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
194 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
196 success = buffer_get_char(&m);
198 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
200 if ((p = BN_new()) == NULL)
201 fatal("%s: BN_new failed", __func__);
202 if ((g = BN_new()) == NULL)
203 fatal("%s: BN_new failed", __func__);
204 buffer_get_bignum2(&m, p);
205 buffer_get_bignum2(&m, g);
207 debug3("%s: remaining %d", __func__, buffer_len(&m));
210 return (dh_new_group(g, p));
214 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
216 Kex *kex = *pmonitor->m_pkex;
219 debug3("%s entering", __func__);
222 buffer_put_int(&m, kex->host_key_index(key));
223 buffer_put_string(&m, data, datalen);
225 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
227 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
228 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
229 *sigp = buffer_get_string(&m, lenp);
236 mm_getpwnamallow(const char *username)
241 ServerOptions *newopts;
243 debug3("%s entering", __func__);
246 buffer_put_cstring(&m, username);
248 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
250 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
251 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
253 if (buffer_get_char(&m) == 0) {
257 pw = buffer_get_string(&m, &len);
258 if (len != sizeof(struct passwd))
259 fatal("%s: struct passwd size mismatch", __func__);
260 pw->pw_name = buffer_get_string(&m, NULL);
261 pw->pw_passwd = buffer_get_string(&m, NULL);
262 pw->pw_gecos = buffer_get_string(&m, NULL);
263 #ifdef HAVE_PW_CLASS_IN_PASSWD
264 pw->pw_class = buffer_get_string(&m, NULL);
266 pw->pw_dir = buffer_get_string(&m, NULL);
267 pw->pw_shell = buffer_get_string(&m, NULL);
270 /* copy options block as a Match directive may have changed some */
271 newopts = buffer_get_string(&m, &len);
272 if (len != sizeof(*newopts))
273 fatal("%s: option block size mismatch", __func__);
275 #define M_CP_STROPT(x) do { \
276 if (newopts->x != NULL) \
277 newopts->x = buffer_get_string(&m, NULL); \
279 #define M_CP_STRARRAYOPT(x, nx) do { \
280 for (i = 0; i < newopts->nx; i++) \
281 newopts->x[i] = buffer_get_string(&m, NULL); \
283 /* See comment in servconf.h */
284 COPY_MATCH_STRING_OPTS();
286 #undef M_CP_STRARRAYOPT
288 copy_set_server_options(&options, newopts, 1);
297 mm_auth2_read_banner(void)
302 debug3("%s entering", __func__);
305 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
308 mm_request_receive_expect(pmonitor->m_recvfd,
309 MONITOR_ANS_AUTH2_READ_BANNER, &m);
310 banner = buffer_get_string(&m, NULL);
313 /* treat empty banner as missing banner */
314 if (strlen(banner) == 0) {
321 /* Inform the privileged process about service and style */
324 mm_inform_authserv(char *service, char *style)
328 debug3("%s entering", __func__);
331 buffer_put_cstring(&m, service);
332 buffer_put_cstring(&m, style ? style : "");
334 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
339 /* Do the password authentication */
341 mm_auth_password(Authctxt *authctxt, char *password)
344 int authenticated = 0;
346 debug3("%s entering", __func__);
349 buffer_put_cstring(&m, password);
350 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
352 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
353 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
355 authenticated = buffer_get_int(&m);
359 debug3("%s: user %sauthenticated",
360 __func__, authenticated ? "" : "not ");
361 return (authenticated);
365 mm_user_key_allowed(struct passwd *pw, Key *key)
367 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
371 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
374 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
378 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
379 char *host, Key *key)
383 key->type = KEY_RSA; /* XXX hack for key_to_blob */
384 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
385 key->type = KEY_RSA1;
390 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
395 int allowed = 0, have_forced = 0;
397 debug3("%s entering", __func__);
399 /* Convert the key to a blob and the pass it over */
400 if (!key_to_blob(key, &blob, &len))
404 buffer_put_int(&m, type);
405 buffer_put_cstring(&m, user ? user : "");
406 buffer_put_cstring(&m, host ? host : "");
407 buffer_put_string(&m, blob, len);
410 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
412 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
413 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
415 allowed = buffer_get_int(&m);
417 /* fake forced command */
418 auth_clear_options();
419 have_forced = buffer_get_int(&m);
420 forced_command = have_forced ? xstrdup("true") : NULL;
428 * This key verify needs to send the key type along, because the
429 * privileged parent makes the decision if the key is allowed
430 * for authentication.
434 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
441 debug3("%s entering", __func__);
443 /* Convert the key to a blob and the pass it over */
444 if (!key_to_blob(key, &blob, &len))
448 buffer_put_string(&m, blob, len);
449 buffer_put_string(&m, sig, siglen);
450 buffer_put_string(&m, data, datalen);
453 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
455 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
456 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
458 verified = buffer_get_int(&m);
465 /* Export key state after authentication */
467 mm_newkeys_from_blob(u_char *blob, int blen)
471 Newkeys *newkey = NULL;
476 debug3("%s: %p(%d)", __func__, blob, blen);
478 dump_base64(stderr, blob, blen);
481 buffer_append(&b, blob, blen);
483 newkey = xmalloc(sizeof(*newkey));
486 comp = &newkey->comp;
489 enc->name = buffer_get_string(&b, NULL);
490 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
491 enc->enabled = buffer_get_int(&b);
492 enc->block_size = buffer_get_int(&b);
493 enc->key = buffer_get_string(&b, &enc->key_len);
494 enc->iv = buffer_get_string(&b, &enc->iv_len);
496 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
497 fatal("%s: bad cipher name %s or pointer %p", __func__,
498 enc->name, enc->cipher);
501 if (cipher_authlen(enc->cipher) == 0) {
502 mac->name = buffer_get_string(&b, NULL);
503 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
504 fatal("%s: can not setup mac %s", __func__, mac->name);
505 mac->enabled = buffer_get_int(&b);
506 mac->key = buffer_get_string(&b, &len);
507 if (len > mac->key_len)
508 fatal("%s: bad mac key length: %u > %d", __func__, len,
514 comp->type = buffer_get_int(&b);
515 comp->enabled = buffer_get_int(&b);
516 comp->name = buffer_get_string(&b, NULL);
518 len = buffer_len(&b);
520 error("newkeys_from_blob: remaining bytes in blob %u", len);
526 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
533 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
535 debug3("%s: converting %p", __func__, newkey);
537 if (newkey == NULL) {
538 error("%s: newkey == NULL", __func__);
543 comp = &newkey->comp;
547 buffer_put_cstring(&b, enc->name);
548 /* The cipher struct is constant and shared, you export pointer */
549 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
550 buffer_put_int(&b, enc->enabled);
551 buffer_put_int(&b, enc->block_size);
552 buffer_put_string(&b, enc->key, enc->key_len);
553 packet_get_keyiv(mode, enc->iv, enc->iv_len);
554 buffer_put_string(&b, enc->iv, enc->iv_len);
557 if (cipher_authlen(enc->cipher) == 0) {
558 buffer_put_cstring(&b, mac->name);
559 buffer_put_int(&b, mac->enabled);
560 buffer_put_string(&b, mac->key, mac->key_len);
564 buffer_put_int(&b, comp->type);
565 buffer_put_int(&b, comp->enabled);
566 buffer_put_cstring(&b, comp->name);
568 len = buffer_len(&b);
572 *blobp = xmalloc(len);
573 memcpy(*blobp, buffer_ptr(&b), len);
575 memset(buffer_ptr(&b), 0, len);
581 mm_send_kex(Buffer *m, Kex *kex)
583 buffer_put_string(m, kex->session_id, kex->session_id_len);
584 buffer_put_int(m, kex->we_need);
585 buffer_put_int(m, kex->hostkey_type);
586 buffer_put_int(m, kex->kex_type);
587 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
588 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
589 buffer_put_int(m, kex->flags);
590 buffer_put_cstring(m, kex->client_version_string);
591 buffer_put_cstring(m, kex->server_version_string);
595 mm_send_keystate(struct monitor *monitor)
597 Buffer m, *input, *output;
600 u_int32_t seqnr, packets;
601 u_int64_t blocks, bytes;
610 buffer_put_int(&m, packet_get_protocol_flags());
612 buffer_put_int(&m, packet_get_ssh1_cipher());
614 debug3("%s: Sending ssh1 KEY+IV", __func__);
615 keylen = packet_get_encryption_key(NULL);
616 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
617 keylen = packet_get_encryption_key(key);
618 buffer_put_string(&m, key, keylen);
619 memset(key, 0, keylen);
622 ivlen = packet_get_keyiv_len(MODE_OUT);
623 packet_get_keyiv(MODE_OUT, iv, ivlen);
624 buffer_put_string(&m, iv, ivlen);
625 ivlen = packet_get_keyiv_len(MODE_IN);
626 packet_get_keyiv(MODE_IN, iv, ivlen);
627 buffer_put_string(&m, iv, ivlen);
630 /* Kex for rekeying */
631 mm_send_kex(&m, *monitor->m_pkex);
634 debug3("%s: Sending new keys: %p %p",
635 __func__, packet_get_newkeys(MODE_OUT),
636 packet_get_newkeys(MODE_IN));
639 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
640 fatal("%s: conversion of newkeys failed", __func__);
642 buffer_put_string(&m, blob, bloblen);
645 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
646 fatal("%s: conversion of newkeys failed", __func__);
648 buffer_put_string(&m, blob, bloblen);
651 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
652 buffer_put_int(&m, seqnr);
653 buffer_put_int64(&m, blocks);
654 buffer_put_int(&m, packets);
655 buffer_put_int64(&m, bytes);
656 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
657 buffer_put_int(&m, seqnr);
658 buffer_put_int64(&m, blocks);
659 buffer_put_int(&m, packets);
660 buffer_put_int64(&m, bytes);
662 debug3("%s: New keys have been sent", __func__);
664 /* More key context */
665 plen = packet_get_keycontext(MODE_OUT, NULL);
667 packet_get_keycontext(MODE_OUT, p);
668 buffer_put_string(&m, p, plen);
671 plen = packet_get_keycontext(MODE_IN, NULL);
673 packet_get_keycontext(MODE_IN, p);
674 buffer_put_string(&m, p, plen);
677 /* Compression state */
678 debug3("%s: Sending compression state", __func__);
679 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
680 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
682 /* Network I/O buffers */
683 input = (Buffer *)packet_get_input();
684 output = (Buffer *)packet_get_output();
685 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
686 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
690 buffer_put_int64(&m, get_sent_bytes());
691 buffer_put_int64(&m, get_recv_bytes());
694 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
695 debug3("%s: Finished sending state", __func__);
701 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
705 int success = 0, tmp1 = -1, tmp2 = -1;
707 /* Kludge: ensure there are fds free to receive the pty/tty */
708 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
709 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
710 error("%s: cannot allocate fds for pty", __func__);
721 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
723 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
724 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
726 success = buffer_get_int(&m);
728 debug3("%s: pty alloc failed", __func__);
732 p = buffer_get_string(&m, NULL);
733 msg = buffer_get_string(&m, NULL);
736 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
739 buffer_append(&loginmsg, msg, strlen(msg));
742 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
743 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
744 fatal("%s: receive fds failed", __func__);
751 mm_session_pty_cleanup2(Session *s)
758 buffer_put_cstring(&m, s->tty);
759 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
762 /* closed dup'ed master */
763 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
764 error("close(s->ptymaster/%d): %s",
765 s->ptymaster, strerror(errno));
767 /* unlink pty from session */
773 mm_start_pam(Authctxt *authctxt)
777 debug3("%s entering", __func__);
778 if (!options.use_pam)
779 fatal("UsePAM=no, but ended up in %s anyway", __func__);
782 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
788 mm_do_pam_account(void)
794 debug3("%s entering", __func__);
795 if (!options.use_pam)
796 fatal("UsePAM=no, but ended up in %s anyway", __func__);
799 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
801 mm_request_receive_expect(pmonitor->m_recvfd,
802 MONITOR_ANS_PAM_ACCOUNT, &m);
803 ret = buffer_get_int(&m);
804 msg = buffer_get_string(&m, NULL);
805 buffer_append(&loginmsg, msg, strlen(msg));
810 debug3("%s returning %d", __func__, ret);
816 mm_sshpam_init_ctx(Authctxt *authctxt)
821 debug3("%s", __func__);
823 buffer_put_cstring(&m, authctxt->user);
824 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
825 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
826 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
827 success = buffer_get_int(&m);
829 debug3("%s: pam_init_ctx failed", __func__);
838 mm_sshpam_query(void *ctx, char **name, char **info,
839 u_int *num, char ***prompts, u_int **echo_on)
845 debug3("%s", __func__);
847 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
848 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
849 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
850 ret = buffer_get_int(&m);
851 debug3("%s: pam_query returned %d", __func__, ret);
852 *name = buffer_get_string(&m, NULL);
853 *info = buffer_get_string(&m, NULL);
854 *num = buffer_get_int(&m);
855 if (*num > PAM_MAX_NUM_MSG)
856 fatal("%s: recieved %u PAM messages, expected <= %u",
857 __func__, *num, PAM_MAX_NUM_MSG);
858 *prompts = xcalloc((*num + 1), sizeof(char *));
859 *echo_on = xcalloc((*num + 1), sizeof(u_int));
860 for (i = 0; i < *num; ++i) {
861 (*prompts)[i] = buffer_get_string(&m, NULL);
862 (*echo_on)[i] = buffer_get_int(&m);
869 mm_sshpam_respond(void *ctx, u_int num, char **resp)
875 debug3("%s", __func__);
877 buffer_put_int(&m, num);
878 for (i = 0; i < num; ++i)
879 buffer_put_cstring(&m, resp[i]);
880 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
881 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
882 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
883 ret = buffer_get_int(&m);
884 debug3("%s: pam_respond returned %d", __func__, ret);
890 mm_sshpam_free_ctx(void *ctxtp)
894 debug3("%s", __func__);
896 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
897 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
898 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
903 /* Request process termination */
911 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
916 mm_ssh1_session_key(BIGNUM *num)
922 buffer_put_bignum2(&m, num);
923 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
925 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
927 rsafail = buffer_get_int(&m);
928 buffer_get_bignum2(&m, num);
936 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
937 char ***prompts, u_int **echo_on)
940 *infotxt = xstrdup("");
942 *prompts = xcalloc(*numprompts, sizeof(char *));
943 *echo_on = xcalloc(*numprompts, sizeof(u_int));
948 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
949 u_int *numprompts, char ***prompts, u_int **echo_on)
955 debug3("%s: entering", __func__);
958 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
960 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
962 success = buffer_get_int(&m);
964 debug3("%s: no challenge", __func__);
969 /* Get the challenge, and format the response */
970 challenge = buffer_get_string(&m, NULL);
973 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
974 (*prompts)[0] = challenge;
976 debug3("%s: received challenge: %s", __func__, challenge);
982 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
987 debug3("%s: entering", __func__);
988 if (numresponses != 1)
992 buffer_put_cstring(&m, responses[0]);
993 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
995 mm_request_receive_expect(pmonitor->m_recvfd,
996 MONITOR_ANS_BSDAUTHRESPOND, &m);
998 authok = buffer_get_int(&m);
1001 return ((authok == 0) ? -1 : 0);
1006 mm_skey_query(void *ctx, char **name, char **infotxt,
1007 u_int *numprompts, char ***prompts, u_int **echo_on)
1013 debug3("%s: entering", __func__);
1016 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
1018 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
1020 success = buffer_get_int(&m);
1022 debug3("%s: no challenge", __func__);
1027 /* Get the challenge, and format the response */
1028 challenge = buffer_get_string(&m, NULL);
1031 debug3("%s: received challenge: %s", __func__, challenge);
1033 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1035 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1042 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1047 debug3("%s: entering", __func__);
1048 if (numresponses != 1)
1052 buffer_put_cstring(&m, responses[0]);
1053 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1055 mm_request_receive_expect(pmonitor->m_recvfd,
1056 MONITOR_ANS_SKEYRESPOND, &m);
1058 authok = buffer_get_int(&m);
1061 return ((authok == 0) ? -1 : 0);
1066 mm_ssh1_session_id(u_char session_id[16])
1071 debug3("%s entering", __func__);
1074 for (i = 0; i < 16; i++)
1075 buffer_put_char(&m, session_id[i]);
1077 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1082 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1088 int allowed = 0, have_forced = 0;
1090 debug3("%s entering", __func__);
1093 buffer_put_bignum2(&m, client_n);
1095 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1096 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1098 allowed = buffer_get_int(&m);
1100 /* fake forced command */
1101 auth_clear_options();
1102 have_forced = buffer_get_int(&m);
1103 forced_command = have_forced ? xstrdup("true") : NULL;
1105 if (allowed && rkey != NULL) {
1106 blob = buffer_get_string(&m, &blen);
1107 if ((key = key_from_blob(blob, blen)) == NULL)
1108 fatal("%s: key_from_blob failed", __func__);
1118 mm_auth_rsa_generate_challenge(Key *key)
1125 debug3("%s entering", __func__);
1127 if ((challenge = BN_new()) == NULL)
1128 fatal("%s: BN_new failed", __func__);
1130 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1131 if (key_to_blob(key, &blob, &blen) == 0)
1132 fatal("%s: key_to_blob failed", __func__);
1133 key->type = KEY_RSA1;
1136 buffer_put_string(&m, blob, blen);
1139 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1140 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1142 buffer_get_bignum2(&m, challenge);
1149 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1156 debug3("%s entering", __func__);
1158 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1159 if (key_to_blob(key, &blob, &blen) == 0)
1160 fatal("%s: key_to_blob failed", __func__);
1161 key->type = KEY_RSA1;
1164 buffer_put_string(&m, blob, blen);
1165 buffer_put_string(&m, response, 16);
1168 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1169 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1171 success = buffer_get_int(&m);
1177 #ifdef SSH_AUDIT_EVENTS
1179 mm_audit_event(ssh_audit_event_t event)
1183 debug3("%s entering", __func__);
1186 buffer_put_int(&m, event);
1188 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1193 mm_audit_run_command(const char *command)
1197 debug3("%s entering command %s", __func__, command);
1200 buffer_put_cstring(&m, command);
1202 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1205 #endif /* SSH_AUDIT_EVENTS */
1209 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1214 /* Client doesn't get to see the context */
1218 buffer_put_string(&m, goid->elements, goid->length);
1220 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1221 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1223 major = buffer_get_int(&m);
1230 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1231 gss_buffer_desc *out, OM_uint32 *flags)
1238 buffer_put_string(&m, in->value, in->length);
1240 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1241 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1243 major = buffer_get_int(&m);
1244 out->value = buffer_get_string(&m, &len);
1247 *flags = buffer_get_int(&m);
1255 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1261 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1262 buffer_put_string(&m, gssmic->value, gssmic->length);
1264 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1265 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1268 major = buffer_get_int(&m);
1274 mm_ssh_gssapi_userok(char *user)
1277 int authenticated = 0;
1281 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1282 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1285 authenticated = buffer_get_int(&m);
1288 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1289 return (authenticated);
1295 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1296 char **hash_scheme, char **salt)
1300 debug3("%s entering", __func__);
1303 mm_request_send(pmonitor->m_recvfd,
1304 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1306 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1307 mm_request_receive_expect(pmonitor->m_recvfd,
1308 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1310 *hash_scheme = buffer_get_string(&m, NULL);
1311 *salt = buffer_get_string(&m, NULL);
1317 mm_jpake_step1(struct modp_group *grp,
1318 u_char **id, u_int *id_len,
1319 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1320 u_char **priv1_proof, u_int *priv1_proof_len,
1321 u_char **priv2_proof, u_int *priv2_proof_len)
1325 debug3("%s entering", __func__);
1328 mm_request_send(pmonitor->m_recvfd,
1329 MONITOR_REQ_JPAKE_STEP1, &m);
1331 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1332 mm_request_receive_expect(pmonitor->m_recvfd,
1333 MONITOR_ANS_JPAKE_STEP1, &m);
1335 if ((*priv1 = BN_new()) == NULL ||
1336 (*priv2 = BN_new()) == NULL ||
1337 (*g_priv1 = BN_new()) == NULL ||
1338 (*g_priv2 = BN_new()) == NULL)
1339 fatal("%s: BN_new", __func__);
1341 *id = buffer_get_string(&m, id_len);
1342 /* priv1 and priv2 are, well, private */
1343 buffer_get_bignum2(&m, *g_priv1);
1344 buffer_get_bignum2(&m, *g_priv2);
1345 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1346 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1352 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1353 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1354 const u_char *theirid, u_int theirid_len,
1355 const u_char *myid, u_int myid_len,
1356 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1357 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1359 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1363 debug3("%s entering", __func__);
1366 /* monitor already has all bignums except theirpub1, theirpub2 */
1367 buffer_put_bignum2(&m, theirpub1);
1368 buffer_put_bignum2(&m, theirpub2);
1369 /* monitor already knows our id */
1370 buffer_put_string(&m, theirid, theirid_len);
1371 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1372 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1374 mm_request_send(pmonitor->m_recvfd,
1375 MONITOR_REQ_JPAKE_STEP2, &m);
1377 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1378 mm_request_receive_expect(pmonitor->m_recvfd,
1379 MONITOR_ANS_JPAKE_STEP2, &m);
1381 if ((*newpub = BN_new()) == NULL)
1382 fatal("%s: BN_new", __func__);
1384 buffer_get_bignum2(&m, *newpub);
1385 *newpub_exponent_proof = buffer_get_string(&m,
1386 newpub_exponent_proof_len);
1392 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1393 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1394 BIGNUM *theirpub1, BIGNUM *theirpub2,
1395 const u_char *my_id, u_int my_id_len,
1396 const u_char *their_id, u_int their_id_len,
1397 const u_char *sess_id, u_int sess_id_len,
1398 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1400 u_char **confirm_hash, u_int *confirm_hash_len)
1404 debug3("%s entering", __func__);
1407 /* monitor already has all bignums except step2_val */
1408 buffer_put_bignum2(&m, step2_val);
1409 /* monitor already knows all the ids */
1410 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1412 mm_request_send(pmonitor->m_recvfd,
1413 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1415 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1416 mm_request_receive_expect(pmonitor->m_recvfd,
1417 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1419 /* 'k' is sensitive and stays in the monitor */
1420 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1426 mm_jpake_check_confirm(const BIGNUM *k,
1427 const u_char *peer_id, u_int peer_id_len,
1428 const u_char *sess_id, u_int sess_id_len,
1429 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1434 debug3("%s entering", __func__);
1437 /* k is dummy in slave, ignored */
1438 /* monitor knows all the ids */
1439 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1440 mm_request_send(pmonitor->m_recvfd,
1441 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1443 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1444 mm_request_receive_expect(pmonitor->m_recvfd,
1445 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1447 success = buffer_get_int(&m);
1450 debug3("%s: success = %d", __func__, success);