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, style, and role */
324 mm_inform_authserv(char *service, char *style, char *role)
328 debug3("%s entering", __func__);
331 buffer_put_cstring(&m, service);
332 buffer_put_cstring(&m, style ? style : "");
333 buffer_put_cstring(&m, role ? role : "");
335 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
340 /* Inform the privileged process about role */
343 mm_inform_authrole(char *role)
347 debug3("%s entering", __func__);
350 buffer_put_cstring(&m, role ? role : "");
352 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHROLE, &m);
357 /* Do the password authentication */
359 mm_auth_password(Authctxt *authctxt, char *password)
362 int authenticated = 0;
364 debug3("%s entering", __func__);
367 buffer_put_cstring(&m, password);
368 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
370 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
371 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
373 authenticated = buffer_get_int(&m);
377 debug3("%s: user %sauthenticated",
378 __func__, authenticated ? "" : "not ");
379 return (authenticated);
383 mm_user_key_allowed(struct passwd *pw, Key *key)
385 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
389 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
392 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
396 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
397 char *host, Key *key)
401 key->type = KEY_RSA; /* XXX hack for key_to_blob */
402 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
403 key->type = KEY_RSA1;
408 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
413 int allowed = 0, have_forced = 0;
415 debug3("%s entering", __func__);
417 /* Convert the key to a blob and the pass it over */
418 if (!key_to_blob(key, &blob, &len))
422 buffer_put_int(&m, type);
423 buffer_put_cstring(&m, user ? user : "");
424 buffer_put_cstring(&m, host ? host : "");
425 buffer_put_string(&m, blob, len);
428 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
430 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
431 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
433 allowed = buffer_get_int(&m);
435 /* fake forced command */
436 auth_clear_options();
437 have_forced = buffer_get_int(&m);
438 forced_command = have_forced ? xstrdup("true") : NULL;
446 * This key verify needs to send the key type along, because the
447 * privileged parent makes the decision if the key is allowed
448 * for authentication.
452 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
459 debug3("%s entering", __func__);
461 /* Convert the key to a blob and the pass it over */
462 if (!key_to_blob(key, &blob, &len))
466 buffer_put_string(&m, blob, len);
467 buffer_put_string(&m, sig, siglen);
468 buffer_put_string(&m, data, datalen);
471 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
473 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
474 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
476 verified = buffer_get_int(&m);
483 /* Export key state after authentication */
485 mm_newkeys_from_blob(u_char *blob, int blen)
489 Newkeys *newkey = NULL;
494 debug3("%s: %p(%d)", __func__, blob, blen);
496 dump_base64(stderr, blob, blen);
499 buffer_append(&b, blob, blen);
501 newkey = xmalloc(sizeof(*newkey));
504 comp = &newkey->comp;
507 enc->name = buffer_get_string(&b, NULL);
508 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
509 enc->enabled = buffer_get_int(&b);
510 enc->block_size = buffer_get_int(&b);
511 enc->key = buffer_get_string(&b, &enc->key_len);
512 enc->iv = buffer_get_string(&b, &len);
513 if (len != enc->block_size)
514 fatal("%s: bad ivlen: expected %u != %u", __func__,
515 enc->block_size, len);
517 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
518 fatal("%s: bad cipher name %s or pointer %p", __func__,
519 enc->name, enc->cipher);
522 mac->name = buffer_get_string(&b, NULL);
523 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
524 fatal("%s: can not setup mac %s", __func__, mac->name);
525 mac->enabled = buffer_get_int(&b);
526 mac->key = buffer_get_string(&b, &len);
527 if (len > mac->key_len)
528 fatal("%s: bad mac key length: %u > %d", __func__, len,
533 comp->type = buffer_get_int(&b);
534 comp->enabled = buffer_get_int(&b);
535 comp->name = buffer_get_string(&b, NULL);
537 len = buffer_len(&b);
539 error("newkeys_from_blob: remaining bytes in blob %u", len);
545 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
552 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
554 debug3("%s: converting %p", __func__, newkey);
556 if (newkey == NULL) {
557 error("%s: newkey == NULL", __func__);
562 comp = &newkey->comp;
566 buffer_put_cstring(&b, enc->name);
567 /* The cipher struct is constant and shared, you export pointer */
568 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
569 buffer_put_int(&b, enc->enabled);
570 buffer_put_int(&b, enc->block_size);
571 buffer_put_string(&b, enc->key, enc->key_len);
572 packet_get_keyiv(mode, enc->iv, enc->block_size);
573 buffer_put_string(&b, enc->iv, enc->block_size);
576 buffer_put_cstring(&b, mac->name);
577 buffer_put_int(&b, mac->enabled);
578 buffer_put_string(&b, mac->key, mac->key_len);
581 buffer_put_int(&b, comp->type);
582 buffer_put_int(&b, comp->enabled);
583 buffer_put_cstring(&b, comp->name);
585 len = buffer_len(&b);
589 *blobp = xmalloc(len);
590 memcpy(*blobp, buffer_ptr(&b), len);
592 memset(buffer_ptr(&b), 0, len);
598 mm_send_kex(Buffer *m, Kex *kex)
600 buffer_put_string(m, kex->session_id, kex->session_id_len);
601 buffer_put_int(m, kex->we_need);
602 buffer_put_int(m, kex->hostkey_type);
603 buffer_put_int(m, kex->kex_type);
604 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
605 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
606 buffer_put_int(m, kex->flags);
607 buffer_put_cstring(m, kex->client_version_string);
608 buffer_put_cstring(m, kex->server_version_string);
612 mm_send_keystate(struct monitor *monitor)
614 Buffer m, *input, *output;
617 u_int32_t seqnr, packets;
618 u_int64_t blocks, bytes;
627 buffer_put_int(&m, packet_get_protocol_flags());
629 buffer_put_int(&m, packet_get_ssh1_cipher());
631 debug3("%s: Sending ssh1 KEY+IV", __func__);
632 keylen = packet_get_encryption_key(NULL);
633 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
634 keylen = packet_get_encryption_key(key);
635 buffer_put_string(&m, key, keylen);
636 memset(key, 0, keylen);
639 ivlen = packet_get_keyiv_len(MODE_OUT);
640 packet_get_keyiv(MODE_OUT, iv, ivlen);
641 buffer_put_string(&m, iv, ivlen);
642 ivlen = packet_get_keyiv_len(MODE_OUT);
643 packet_get_keyiv(MODE_IN, iv, ivlen);
644 buffer_put_string(&m, iv, ivlen);
647 /* Kex for rekeying */
648 mm_send_kex(&m, *monitor->m_pkex);
651 debug3("%s: Sending new keys: %p %p",
652 __func__, packet_get_newkeys(MODE_OUT),
653 packet_get_newkeys(MODE_IN));
656 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
657 fatal("%s: conversion of newkeys failed", __func__);
659 buffer_put_string(&m, blob, bloblen);
662 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
663 fatal("%s: conversion of newkeys failed", __func__);
665 buffer_put_string(&m, blob, bloblen);
668 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
669 buffer_put_int(&m, seqnr);
670 buffer_put_int64(&m, blocks);
671 buffer_put_int(&m, packets);
672 buffer_put_int64(&m, bytes);
673 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
674 buffer_put_int(&m, seqnr);
675 buffer_put_int64(&m, blocks);
676 buffer_put_int(&m, packets);
677 buffer_put_int64(&m, bytes);
679 debug3("%s: New keys have been sent", __func__);
681 /* More key context */
682 plen = packet_get_keycontext(MODE_OUT, NULL);
684 packet_get_keycontext(MODE_OUT, p);
685 buffer_put_string(&m, p, plen);
688 plen = packet_get_keycontext(MODE_IN, NULL);
690 packet_get_keycontext(MODE_IN, p);
691 buffer_put_string(&m, p, plen);
694 /* Compression state */
695 debug3("%s: Sending compression state", __func__);
696 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
697 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
699 /* Network I/O buffers */
700 input = (Buffer *)packet_get_input();
701 output = (Buffer *)packet_get_output();
702 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
703 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
707 buffer_put_int64(&m, get_sent_bytes());
708 buffer_put_int64(&m, get_recv_bytes());
711 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
712 debug3("%s: Finished sending state", __func__);
718 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
722 int success = 0, tmp1 = -1, tmp2 = -1;
724 /* Kludge: ensure there are fds free to receive the pty/tty */
725 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
726 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
727 error("%s: cannot allocate fds for pty", __func__);
738 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
740 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
741 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
743 success = buffer_get_int(&m);
745 debug3("%s: pty alloc failed", __func__);
749 p = buffer_get_string(&m, NULL);
750 msg = buffer_get_string(&m, NULL);
753 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
756 buffer_append(&loginmsg, msg, strlen(msg));
759 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
760 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
761 fatal("%s: receive fds failed", __func__);
768 mm_session_pty_cleanup2(Session *s)
775 buffer_put_cstring(&m, s->tty);
776 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
779 /* closed dup'ed master */
780 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
781 error("close(s->ptymaster/%d): %s",
782 s->ptymaster, strerror(errno));
784 /* unlink pty from session */
790 mm_start_pam(Authctxt *authctxt)
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_START, &m);
805 mm_do_pam_account(void)
811 debug3("%s entering", __func__);
812 if (!options.use_pam)
813 fatal("UsePAM=no, but ended up in %s anyway", __func__);
816 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
818 mm_request_receive_expect(pmonitor->m_recvfd,
819 MONITOR_ANS_PAM_ACCOUNT, &m);
820 ret = buffer_get_int(&m);
821 msg = buffer_get_string(&m, NULL);
822 buffer_append(&loginmsg, msg, strlen(msg));
827 debug3("%s returning %d", __func__, ret);
833 mm_sshpam_init_ctx(Authctxt *authctxt)
838 debug3("%s", __func__);
840 buffer_put_cstring(&m, authctxt->user);
841 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
842 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
843 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
844 success = buffer_get_int(&m);
846 debug3("%s: pam_init_ctx failed", __func__);
855 mm_sshpam_query(void *ctx, char **name, char **info,
856 u_int *num, char ***prompts, u_int **echo_on)
862 debug3("%s", __func__);
864 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
865 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
866 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
867 ret = buffer_get_int(&m);
868 debug3("%s: pam_query returned %d", __func__, ret);
869 *name = buffer_get_string(&m, NULL);
870 *info = buffer_get_string(&m, NULL);
871 *num = buffer_get_int(&m);
872 if (*num > PAM_MAX_NUM_MSG)
873 fatal("%s: recieved %u PAM messages, expected <= %u",
874 __func__, *num, PAM_MAX_NUM_MSG);
875 *prompts = xcalloc((*num + 1), sizeof(char *));
876 *echo_on = xcalloc((*num + 1), sizeof(u_int));
877 for (i = 0; i < *num; ++i) {
878 (*prompts)[i] = buffer_get_string(&m, NULL);
879 (*echo_on)[i] = buffer_get_int(&m);
886 mm_sshpam_respond(void *ctx, u_int num, char **resp)
892 debug3("%s", __func__);
894 buffer_put_int(&m, num);
895 for (i = 0; i < num; ++i)
896 buffer_put_cstring(&m, resp[i]);
897 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
898 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
899 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
900 ret = buffer_get_int(&m);
901 debug3("%s: pam_respond returned %d", __func__, ret);
907 mm_sshpam_free_ctx(void *ctxtp)
911 debug3("%s", __func__);
913 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
914 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
915 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
920 /* Request process termination */
928 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
933 mm_ssh1_session_key(BIGNUM *num)
939 buffer_put_bignum2(&m, num);
940 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
942 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
944 rsafail = buffer_get_int(&m);
945 buffer_get_bignum2(&m, num);
953 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
954 char ***prompts, u_int **echo_on)
957 *infotxt = xstrdup("");
959 *prompts = xcalloc(*numprompts, sizeof(char *));
960 *echo_on = xcalloc(*numprompts, sizeof(u_int));
965 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
966 u_int *numprompts, char ***prompts, u_int **echo_on)
972 debug3("%s: entering", __func__);
975 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
977 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
979 success = buffer_get_int(&m);
981 debug3("%s: no challenge", __func__);
986 /* Get the challenge, and format the response */
987 challenge = buffer_get_string(&m, NULL);
990 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
991 (*prompts)[0] = challenge;
993 debug3("%s: received challenge: %s", __func__, challenge);
999 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
1004 debug3("%s: entering", __func__);
1005 if (numresponses != 1)
1009 buffer_put_cstring(&m, responses[0]);
1010 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
1012 mm_request_receive_expect(pmonitor->m_recvfd,
1013 MONITOR_ANS_BSDAUTHRESPOND, &m);
1015 authok = buffer_get_int(&m);
1018 return ((authok == 0) ? -1 : 0);
1023 mm_skey_query(void *ctx, char **name, char **infotxt,
1024 u_int *numprompts, char ***prompts, u_int **echo_on)
1030 debug3("%s: entering", __func__);
1033 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
1035 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
1037 success = buffer_get_int(&m);
1039 debug3("%s: no challenge", __func__);
1044 /* Get the challenge, and format the response */
1045 challenge = buffer_get_string(&m, NULL);
1048 debug3("%s: received challenge: %s", __func__, challenge);
1050 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1052 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1059 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1064 debug3("%s: entering", __func__);
1065 if (numresponses != 1)
1069 buffer_put_cstring(&m, responses[0]);
1070 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1072 mm_request_receive_expect(pmonitor->m_recvfd,
1073 MONITOR_ANS_SKEYRESPOND, &m);
1075 authok = buffer_get_int(&m);
1078 return ((authok == 0) ? -1 : 0);
1083 mm_ssh1_session_id(u_char session_id[16])
1088 debug3("%s entering", __func__);
1091 for (i = 0; i < 16; i++)
1092 buffer_put_char(&m, session_id[i]);
1094 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1099 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1105 int allowed = 0, have_forced = 0;
1107 debug3("%s entering", __func__);
1110 buffer_put_bignum2(&m, client_n);
1112 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1113 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1115 allowed = buffer_get_int(&m);
1117 /* fake forced command */
1118 auth_clear_options();
1119 have_forced = buffer_get_int(&m);
1120 forced_command = have_forced ? xstrdup("true") : NULL;
1122 if (allowed && rkey != NULL) {
1123 blob = buffer_get_string(&m, &blen);
1124 if ((key = key_from_blob(blob, blen)) == NULL)
1125 fatal("%s: key_from_blob failed", __func__);
1135 mm_auth_rsa_generate_challenge(Key *key)
1142 debug3("%s entering", __func__);
1144 if ((challenge = BN_new()) == NULL)
1145 fatal("%s: BN_new failed", __func__);
1147 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1148 if (key_to_blob(key, &blob, &blen) == 0)
1149 fatal("%s: key_to_blob failed", __func__);
1150 key->type = KEY_RSA1;
1153 buffer_put_string(&m, blob, blen);
1156 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1157 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1159 buffer_get_bignum2(&m, challenge);
1166 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1173 debug3("%s entering", __func__);
1175 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1176 if (key_to_blob(key, &blob, &blen) == 0)
1177 fatal("%s: key_to_blob failed", __func__);
1178 key->type = KEY_RSA1;
1181 buffer_put_string(&m, blob, blen);
1182 buffer_put_string(&m, response, 16);
1185 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1186 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1188 success = buffer_get_int(&m);
1194 #ifdef SSH_AUDIT_EVENTS
1196 mm_audit_event(ssh_audit_event_t event)
1200 debug3("%s entering", __func__);
1203 buffer_put_int(&m, event);
1205 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1210 mm_audit_run_command(const char *command)
1214 debug3("%s entering command %s", __func__, command);
1217 buffer_put_cstring(&m, command);
1219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1222 #endif /* SSH_AUDIT_EVENTS */
1226 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1231 /* Client doesn't get to see the context */
1235 buffer_put_string(&m, goid->elements, goid->length);
1237 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1238 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1240 major = buffer_get_int(&m);
1247 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1248 gss_buffer_desc *out, OM_uint32 *flags)
1255 buffer_put_string(&m, in->value, in->length);
1257 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1258 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1260 major = buffer_get_int(&m);
1261 out->value = buffer_get_string(&m, &len);
1264 *flags = buffer_get_int(&m);
1272 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1278 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1279 buffer_put_string(&m, gssmic->value, gssmic->length);
1281 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1282 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1285 major = buffer_get_int(&m);
1291 mm_ssh_gssapi_userok(char *user, struct passwd *pw)
1294 int authenticated = 0;
1298 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1299 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1302 authenticated = buffer_get_int(&m);
1305 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1306 return (authenticated);
1310 mm_ssh_gssapi_last_error(Gssctxt *ctx, OM_uint32 *major, OM_uint32 *minor) {
1317 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSERR, &m);
1318 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSERR, &m);
1320 maj = buffer_get_int(&m);
1321 min = buffer_get_int(&m);
1323 if (major) *major=maj;
1324 if (minor) *minor=min;
1326 errstr=buffer_get_string(&m,NULL);
1334 mm_ssh_gssapi_localname(char **lname)
1339 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSLOCALNAME, &m);
1341 debug3("%s: waiting for MONITOR_ANS_GSSLOCALNAME", __func__);
1342 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSLOCALNAME,
1345 *lname = buffer_get_string(&m, NULL);
1348 if (lname[0] == '\0') {
1349 debug3("%s: gssapi identity mapping failed", __func__);
1351 debug3("%s: gssapi identity mapped to %s", __func__, *lname);
1358 mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash)
1365 buffer_put_string(&m, data->value, data->length);
1367 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m);
1368 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m);
1370 major = buffer_get_int(&m);
1371 hash->value = buffer_get_string(&m, &len);
1380 mm_ssh_gssapi_update_creds(ssh_gssapi_ccache *store)
1387 buffer_put_cstring(&m, store->filename ? store->filename : "");
1388 buffer_put_cstring(&m, store->envvar ? store->envvar : "");
1389 buffer_put_cstring(&m, store->envval ? store->envval : "");
1391 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUPCREDS, &m);
1392 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUPCREDS, &m);
1394 ok = buffer_get_int(&m);
1405 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1406 char **hash_scheme, char **salt)
1410 debug3("%s entering", __func__);
1413 mm_request_send(pmonitor->m_recvfd,
1414 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1416 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1417 mm_request_receive_expect(pmonitor->m_recvfd,
1418 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1420 *hash_scheme = buffer_get_string(&m, NULL);
1421 *salt = buffer_get_string(&m, NULL);
1427 mm_jpake_step1(struct modp_group *grp,
1428 u_char **id, u_int *id_len,
1429 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1430 u_char **priv1_proof, u_int *priv1_proof_len,
1431 u_char **priv2_proof, u_int *priv2_proof_len)
1435 debug3("%s entering", __func__);
1438 mm_request_send(pmonitor->m_recvfd,
1439 MONITOR_REQ_JPAKE_STEP1, &m);
1441 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1442 mm_request_receive_expect(pmonitor->m_recvfd,
1443 MONITOR_ANS_JPAKE_STEP1, &m);
1445 if ((*priv1 = BN_new()) == NULL ||
1446 (*priv2 = BN_new()) == NULL ||
1447 (*g_priv1 = BN_new()) == NULL ||
1448 (*g_priv2 = BN_new()) == NULL)
1449 fatal("%s: BN_new", __func__);
1451 *id = buffer_get_string(&m, id_len);
1452 /* priv1 and priv2 are, well, private */
1453 buffer_get_bignum2(&m, *g_priv1);
1454 buffer_get_bignum2(&m, *g_priv2);
1455 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1456 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1462 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1463 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1464 const u_char *theirid, u_int theirid_len,
1465 const u_char *myid, u_int myid_len,
1466 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1467 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1469 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1473 debug3("%s entering", __func__);
1476 /* monitor already has all bignums except theirpub1, theirpub2 */
1477 buffer_put_bignum2(&m, theirpub1);
1478 buffer_put_bignum2(&m, theirpub2);
1479 /* monitor already knows our id */
1480 buffer_put_string(&m, theirid, theirid_len);
1481 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1482 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1484 mm_request_send(pmonitor->m_recvfd,
1485 MONITOR_REQ_JPAKE_STEP2, &m);
1487 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1488 mm_request_receive_expect(pmonitor->m_recvfd,
1489 MONITOR_ANS_JPAKE_STEP2, &m);
1491 if ((*newpub = BN_new()) == NULL)
1492 fatal("%s: BN_new", __func__);
1494 buffer_get_bignum2(&m, *newpub);
1495 *newpub_exponent_proof = buffer_get_string(&m,
1496 newpub_exponent_proof_len);
1502 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1503 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1504 BIGNUM *theirpub1, BIGNUM *theirpub2,
1505 const u_char *my_id, u_int my_id_len,
1506 const u_char *their_id, u_int their_id_len,
1507 const u_char *sess_id, u_int sess_id_len,
1508 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1510 u_char **confirm_hash, u_int *confirm_hash_len)
1514 debug3("%s entering", __func__);
1517 /* monitor already has all bignums except step2_val */
1518 buffer_put_bignum2(&m, step2_val);
1519 /* monitor already knows all the ids */
1520 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1522 mm_request_send(pmonitor->m_recvfd,
1523 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1525 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1526 mm_request_receive_expect(pmonitor->m_recvfd,
1527 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1529 /* 'k' is sensitive and stays in the monitor */
1530 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1536 mm_jpake_check_confirm(const BIGNUM *k,
1537 const u_char *peer_id, u_int peer_id_len,
1538 const u_char *sess_id, u_int sess_id_len,
1539 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1544 debug3("%s entering", __func__);
1547 /* k is dummy in slave, ignored */
1548 /* monitor knows all the ids */
1549 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1550 mm_request_send(pmonitor->m_recvfd,
1551 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1553 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1554 mm_request_receive_expect(pmonitor->m_recvfd,
1555 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1557 success = buffer_get_int(&m);
1560 debug3("%s: success = %d", __func__, success);