1 /* $OpenBSD: monitor_wrap.c,v 1.73 2011/06/17 21:44:31 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"
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, &len);
495 if (len != enc->block_size)
496 fatal("%s: bad ivlen: expected %u != %u", __func__,
497 enc->block_size, len);
499 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
500 fatal("%s: bad cipher name %s or pointer %p", __func__,
501 enc->name, enc->cipher);
504 mac->name = buffer_get_string(&b, NULL);
505 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
506 fatal("%s: can not setup mac %s", __func__, mac->name);
507 mac->enabled = buffer_get_int(&b);
508 mac->key = buffer_get_string(&b, &len);
509 if (len > mac->key_len)
510 fatal("%s: bad mac key length: %u > %d", __func__, len,
515 comp->type = buffer_get_int(&b);
516 comp->enabled = buffer_get_int(&b);
517 comp->name = buffer_get_string(&b, NULL);
519 len = buffer_len(&b);
521 error("newkeys_from_blob: remaining bytes in blob %u", len);
527 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
534 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
536 debug3("%s: converting %p", __func__, newkey);
538 if (newkey == NULL) {
539 error("%s: newkey == NULL", __func__);
544 comp = &newkey->comp;
548 buffer_put_cstring(&b, enc->name);
549 /* The cipher struct is constant and shared, you export pointer */
550 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
551 buffer_put_int(&b, enc->enabled);
552 buffer_put_int(&b, enc->block_size);
553 buffer_put_string(&b, enc->key, enc->key_len);
554 packet_get_keyiv(mode, enc->iv, enc->block_size);
555 buffer_put_string(&b, enc->iv, enc->block_size);
558 buffer_put_cstring(&b, mac->name);
559 buffer_put_int(&b, mac->enabled);
560 buffer_put_string(&b, mac->key, mac->key_len);
563 buffer_put_int(&b, comp->type);
564 buffer_put_int(&b, comp->enabled);
565 buffer_put_cstring(&b, comp->name);
567 len = buffer_len(&b);
571 *blobp = xmalloc(len);
572 memcpy(*blobp, buffer_ptr(&b), len);
574 memset(buffer_ptr(&b), 0, len);
580 mm_send_kex(Buffer *m, Kex *kex)
582 buffer_put_string(m, kex->session_id, kex->session_id_len);
583 buffer_put_int(m, kex->we_need);
584 buffer_put_int(m, kex->hostkey_type);
585 buffer_put_int(m, kex->kex_type);
586 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
587 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
588 buffer_put_int(m, kex->flags);
589 buffer_put_cstring(m, kex->client_version_string);
590 buffer_put_cstring(m, kex->server_version_string);
594 mm_send_keystate(struct monitor *monitor)
596 Buffer m, *input, *output;
599 u_int32_t seqnr, packets;
600 u_int64_t blocks, bytes;
609 buffer_put_int(&m, packet_get_protocol_flags());
611 buffer_put_int(&m, packet_get_ssh1_cipher());
613 debug3("%s: Sending ssh1 KEY+IV", __func__);
614 keylen = packet_get_encryption_key(NULL);
615 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
616 keylen = packet_get_encryption_key(key);
617 buffer_put_string(&m, key, keylen);
618 memset(key, 0, keylen);
621 ivlen = packet_get_keyiv_len(MODE_OUT);
622 packet_get_keyiv(MODE_OUT, iv, ivlen);
623 buffer_put_string(&m, iv, ivlen);
624 ivlen = packet_get_keyiv_len(MODE_OUT);
625 packet_get_keyiv(MODE_IN, iv, ivlen);
626 buffer_put_string(&m, iv, ivlen);
629 /* Kex for rekeying */
630 mm_send_kex(&m, *monitor->m_pkex);
633 debug3("%s: Sending new keys: %p %p",
634 __func__, packet_get_newkeys(MODE_OUT),
635 packet_get_newkeys(MODE_IN));
638 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
639 fatal("%s: conversion of newkeys failed", __func__);
641 buffer_put_string(&m, blob, bloblen);
644 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
645 fatal("%s: conversion of newkeys failed", __func__);
647 buffer_put_string(&m, blob, bloblen);
650 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
651 buffer_put_int(&m, seqnr);
652 buffer_put_int64(&m, blocks);
653 buffer_put_int(&m, packets);
654 buffer_put_int64(&m, bytes);
655 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
656 buffer_put_int(&m, seqnr);
657 buffer_put_int64(&m, blocks);
658 buffer_put_int(&m, packets);
659 buffer_put_int64(&m, bytes);
661 debug3("%s: New keys have been sent", __func__);
663 /* More key context */
664 plen = packet_get_keycontext(MODE_OUT, NULL);
666 packet_get_keycontext(MODE_OUT, p);
667 buffer_put_string(&m, p, plen);
670 plen = packet_get_keycontext(MODE_IN, NULL);
672 packet_get_keycontext(MODE_IN, p);
673 buffer_put_string(&m, p, plen);
676 /* Compression state */
677 debug3("%s: Sending compression state", __func__);
678 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
679 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
681 /* Network I/O buffers */
682 input = (Buffer *)packet_get_input();
683 output = (Buffer *)packet_get_output();
684 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
685 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
689 buffer_put_int64(&m, get_sent_bytes());
690 buffer_put_int64(&m, get_recv_bytes());
693 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
694 debug3("%s: Finished sending state", __func__);
700 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
704 int success = 0, tmp1 = -1, tmp2 = -1;
706 /* Kludge: ensure there are fds free to receive the pty/tty */
707 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
708 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
709 error("%s: cannot allocate fds for pty", __func__);
720 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
722 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
723 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
725 success = buffer_get_int(&m);
727 debug3("%s: pty alloc failed", __func__);
731 p = buffer_get_string(&m, NULL);
732 msg = buffer_get_string(&m, NULL);
735 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
738 buffer_append(&loginmsg, msg, strlen(msg));
741 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
742 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
743 fatal("%s: receive fds failed", __func__);
750 mm_session_pty_cleanup2(Session *s)
757 buffer_put_cstring(&m, s->tty);
758 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
761 /* closed dup'ed master */
762 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
763 error("close(s->ptymaster/%d): %s",
764 s->ptymaster, strerror(errno));
766 /* unlink pty from session */
772 mm_start_pam(Authctxt *authctxt)
776 debug3("%s entering", __func__);
777 if (!options.use_pam)
778 fatal("UsePAM=no, but ended up in %s anyway", __func__);
781 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
787 mm_do_pam_account(void)
793 debug3("%s entering", __func__);
794 if (!options.use_pam)
795 fatal("UsePAM=no, but ended up in %s anyway", __func__);
798 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
800 mm_request_receive_expect(pmonitor->m_recvfd,
801 MONITOR_ANS_PAM_ACCOUNT, &m);
802 ret = buffer_get_int(&m);
803 msg = buffer_get_string(&m, NULL);
804 buffer_append(&loginmsg, msg, strlen(msg));
809 debug3("%s returning %d", __func__, ret);
815 mm_sshpam_init_ctx(Authctxt *authctxt)
820 debug3("%s", __func__);
822 buffer_put_cstring(&m, authctxt->user);
823 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
824 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
825 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
826 success = buffer_get_int(&m);
828 debug3("%s: pam_init_ctx failed", __func__);
837 mm_sshpam_query(void *ctx, char **name, char **info,
838 u_int *num, char ***prompts, u_int **echo_on)
844 debug3("%s", __func__);
846 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
847 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
848 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
849 ret = buffer_get_int(&m);
850 debug3("%s: pam_query returned %d", __func__, ret);
851 *name = buffer_get_string(&m, NULL);
852 *info = buffer_get_string(&m, NULL);
853 *num = buffer_get_int(&m);
854 if (*num > PAM_MAX_NUM_MSG)
855 fatal("%s: recieved %u PAM messages, expected <= %u",
856 __func__, *num, PAM_MAX_NUM_MSG);
857 *prompts = xcalloc((*num + 1), sizeof(char *));
858 *echo_on = xcalloc((*num + 1), sizeof(u_int));
859 for (i = 0; i < *num; ++i) {
860 (*prompts)[i] = buffer_get_string(&m, NULL);
861 (*echo_on)[i] = buffer_get_int(&m);
868 mm_sshpam_respond(void *ctx, u_int num, char **resp)
874 debug3("%s", __func__);
876 buffer_put_int(&m, num);
877 for (i = 0; i < num; ++i)
878 buffer_put_cstring(&m, resp[i]);
879 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
880 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
881 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
882 ret = buffer_get_int(&m);
883 debug3("%s: pam_respond returned %d", __func__, ret);
889 mm_sshpam_free_ctx(void *ctxtp)
893 debug3("%s", __func__);
895 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
896 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
897 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
902 /* Request process termination */
910 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
915 mm_ssh1_session_key(BIGNUM *num)
921 buffer_put_bignum2(&m, num);
922 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
924 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
926 rsafail = buffer_get_int(&m);
927 buffer_get_bignum2(&m, num);
935 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
936 char ***prompts, u_int **echo_on)
939 *infotxt = xstrdup("");
941 *prompts = xcalloc(*numprompts, sizeof(char *));
942 *echo_on = xcalloc(*numprompts, sizeof(u_int));
947 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
948 u_int *numprompts, char ***prompts, u_int **echo_on)
954 debug3("%s: entering", __func__);
957 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
959 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
961 success = buffer_get_int(&m);
963 debug3("%s: no challenge", __func__);
968 /* Get the challenge, and format the response */
969 challenge = buffer_get_string(&m, NULL);
972 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
973 (*prompts)[0] = challenge;
975 debug3("%s: received challenge: %s", __func__, challenge);
981 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
986 debug3("%s: entering", __func__);
987 if (numresponses != 1)
991 buffer_put_cstring(&m, responses[0]);
992 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
994 mm_request_receive_expect(pmonitor->m_recvfd,
995 MONITOR_ANS_BSDAUTHRESPOND, &m);
997 authok = buffer_get_int(&m);
1000 return ((authok == 0) ? -1 : 0);
1005 mm_skey_query(void *ctx, char **name, char **infotxt,
1006 u_int *numprompts, char ***prompts, u_int **echo_on)
1012 debug3("%s: entering", __func__);
1015 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
1017 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
1019 success = buffer_get_int(&m);
1021 debug3("%s: no challenge", __func__);
1026 /* Get the challenge, and format the response */
1027 challenge = buffer_get_string(&m, NULL);
1030 debug3("%s: received challenge: %s", __func__, challenge);
1032 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1034 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1041 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1046 debug3("%s: entering", __func__);
1047 if (numresponses != 1)
1051 buffer_put_cstring(&m, responses[0]);
1052 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1054 mm_request_receive_expect(pmonitor->m_recvfd,
1055 MONITOR_ANS_SKEYRESPOND, &m);
1057 authok = buffer_get_int(&m);
1060 return ((authok == 0) ? -1 : 0);
1065 mm_ssh1_session_id(u_char session_id[16])
1070 debug3("%s entering", __func__);
1073 for (i = 0; i < 16; i++)
1074 buffer_put_char(&m, session_id[i]);
1076 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1081 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1087 int allowed = 0, have_forced = 0;
1089 debug3("%s entering", __func__);
1092 buffer_put_bignum2(&m, client_n);
1094 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1095 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1097 allowed = buffer_get_int(&m);
1099 /* fake forced command */
1100 auth_clear_options();
1101 have_forced = buffer_get_int(&m);
1102 forced_command = have_forced ? xstrdup("true") : NULL;
1104 if (allowed && rkey != NULL) {
1105 blob = buffer_get_string(&m, &blen);
1106 if ((key = key_from_blob(blob, blen)) == NULL)
1107 fatal("%s: key_from_blob failed", __func__);
1117 mm_auth_rsa_generate_challenge(Key *key)
1124 debug3("%s entering", __func__);
1126 if ((challenge = BN_new()) == NULL)
1127 fatal("%s: BN_new failed", __func__);
1129 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1130 if (key_to_blob(key, &blob, &blen) == 0)
1131 fatal("%s: key_to_blob failed", __func__);
1132 key->type = KEY_RSA1;
1135 buffer_put_string(&m, blob, blen);
1138 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1139 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1141 buffer_get_bignum2(&m, challenge);
1148 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1155 debug3("%s entering", __func__);
1157 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1158 if (key_to_blob(key, &blob, &blen) == 0)
1159 fatal("%s: key_to_blob failed", __func__);
1160 key->type = KEY_RSA1;
1163 buffer_put_string(&m, blob, blen);
1164 buffer_put_string(&m, response, 16);
1167 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1168 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1170 success = buffer_get_int(&m);
1176 #ifdef SSH_AUDIT_EVENTS
1178 mm_audit_event(ssh_audit_event_t event)
1182 debug3("%s entering", __func__);
1185 buffer_put_int(&m, event);
1187 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1192 mm_audit_run_command(const char *command)
1196 debug3("%s entering command %s", __func__, command);
1199 buffer_put_cstring(&m, command);
1201 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1204 #endif /* SSH_AUDIT_EVENTS */
1208 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1213 /* Client doesn't get to see the context */
1217 buffer_put_string(&m, goid->elements, goid->length);
1219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1220 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1222 major = buffer_get_int(&m);
1229 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1230 gss_buffer_desc *out, OM_uint32 *flags)
1237 buffer_put_string(&m, in->value, in->length);
1239 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1240 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1242 major = buffer_get_int(&m);
1243 out->value = buffer_get_string(&m, &len);
1246 *flags = buffer_get_int(&m);
1254 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1260 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1261 buffer_put_string(&m, gssmic->value, gssmic->length);
1263 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1264 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1267 major = buffer_get_int(&m);
1273 mm_ssh_gssapi_userok(char *user)
1276 int authenticated = 0;
1280 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1281 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1284 authenticated = buffer_get_int(&m);
1287 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1288 return (authenticated);
1294 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1295 char **hash_scheme, char **salt)
1299 debug3("%s entering", __func__);
1302 mm_request_send(pmonitor->m_recvfd,
1303 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1305 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1306 mm_request_receive_expect(pmonitor->m_recvfd,
1307 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1309 *hash_scheme = buffer_get_string(&m, NULL);
1310 *salt = buffer_get_string(&m, NULL);
1316 mm_jpake_step1(struct modp_group *grp,
1317 u_char **id, u_int *id_len,
1318 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1319 u_char **priv1_proof, u_int *priv1_proof_len,
1320 u_char **priv2_proof, u_int *priv2_proof_len)
1324 debug3("%s entering", __func__);
1327 mm_request_send(pmonitor->m_recvfd,
1328 MONITOR_REQ_JPAKE_STEP1, &m);
1330 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1331 mm_request_receive_expect(pmonitor->m_recvfd,
1332 MONITOR_ANS_JPAKE_STEP1, &m);
1334 if ((*priv1 = BN_new()) == NULL ||
1335 (*priv2 = BN_new()) == NULL ||
1336 (*g_priv1 = BN_new()) == NULL ||
1337 (*g_priv2 = BN_new()) == NULL)
1338 fatal("%s: BN_new", __func__);
1340 *id = buffer_get_string(&m, id_len);
1341 /* priv1 and priv2 are, well, private */
1342 buffer_get_bignum2(&m, *g_priv1);
1343 buffer_get_bignum2(&m, *g_priv2);
1344 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1345 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1351 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1352 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1353 const u_char *theirid, u_int theirid_len,
1354 const u_char *myid, u_int myid_len,
1355 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1356 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1358 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1362 debug3("%s entering", __func__);
1365 /* monitor already has all bignums except theirpub1, theirpub2 */
1366 buffer_put_bignum2(&m, theirpub1);
1367 buffer_put_bignum2(&m, theirpub2);
1368 /* monitor already knows our id */
1369 buffer_put_string(&m, theirid, theirid_len);
1370 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1371 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1373 mm_request_send(pmonitor->m_recvfd,
1374 MONITOR_REQ_JPAKE_STEP2, &m);
1376 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1377 mm_request_receive_expect(pmonitor->m_recvfd,
1378 MONITOR_ANS_JPAKE_STEP2, &m);
1380 if ((*newpub = BN_new()) == NULL)
1381 fatal("%s: BN_new", __func__);
1383 buffer_get_bignum2(&m, *newpub);
1384 *newpub_exponent_proof = buffer_get_string(&m,
1385 newpub_exponent_proof_len);
1391 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1392 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1393 BIGNUM *theirpub1, BIGNUM *theirpub2,
1394 const u_char *my_id, u_int my_id_len,
1395 const u_char *their_id, u_int their_id_len,
1396 const u_char *sess_id, u_int sess_id_len,
1397 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1399 u_char **confirm_hash, u_int *confirm_hash_len)
1403 debug3("%s entering", __func__);
1406 /* monitor already has all bignums except step2_val */
1407 buffer_put_bignum2(&m, step2_val);
1408 /* monitor already knows all the ids */
1409 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1411 mm_request_send(pmonitor->m_recvfd,
1412 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1414 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1415 mm_request_receive_expect(pmonitor->m_recvfd,
1416 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1418 /* 'k' is sensitive and stays in the monitor */
1419 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1425 mm_jpake_check_confirm(const BIGNUM *k,
1426 const u_char *peer_id, u_int peer_id_len,
1427 const u_char *sess_id, u_int sess_id_len,
1428 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1433 debug3("%s entering", __func__);
1436 /* k is dummy in slave, ignored */
1437 /* monitor knows all the ids */
1438 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1439 mm_request_send(pmonitor->m_recvfd,
1440 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1442 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1443 mm_request_receive_expect(pmonitor->m_recvfd,
1444 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1446 success = buffer_get_int(&m);
1449 debug3("%s: success = %d", __func__, success);