1 /* $OpenBSD: monitor_wrap.c,v 1.70 2010/08/31 11:54:45 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;
95 * m_pid is only set in the privileged part, and
96 * points to the unprivileged child.
98 return (pmonitor && pmonitor->m_pid > 0);
102 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
104 u_int mlen = buffer_len(m);
107 debug3("%s entering: type %d", __func__, type);
109 put_u32(buf, mlen + 1);
110 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
111 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
112 fatal("%s: write: %s", __func__, strerror(errno));
113 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
114 fatal("%s: write: %s", __func__, strerror(errno));
118 mm_request_receive(int sock, Buffer *m)
123 debug3("%s entering", __func__);
125 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
128 fatal("%s: read: %s", __func__, strerror(errno));
130 msg_len = get_u32(buf);
131 if (msg_len > 256 * 1024)
132 fatal("%s: read: bad msg_len %d", __func__, msg_len);
134 buffer_append_space(m, msg_len);
135 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
136 fatal("%s: read: %s", __func__, strerror(errno));
140 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
144 debug3("%s entering: type %d", __func__, type);
146 mm_request_receive(sock, m);
147 rtype = buffer_get_char(m);
149 fatal("%s: read: rtype %d != type %d", __func__,
154 mm_choose_dh(int min, int nbits, int max)
161 buffer_put_int(&m, min);
162 buffer_put_int(&m, nbits);
163 buffer_put_int(&m, max);
165 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
167 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
168 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
170 success = buffer_get_char(&m);
172 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
174 if ((p = BN_new()) == NULL)
175 fatal("%s: BN_new failed", __func__);
176 if ((g = BN_new()) == NULL)
177 fatal("%s: BN_new failed", __func__);
178 buffer_get_bignum2(&m, p);
179 buffer_get_bignum2(&m, g);
181 debug3("%s: remaining %d", __func__, buffer_len(&m));
184 return (dh_new_group(g, p));
188 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
190 Kex *kex = *pmonitor->m_pkex;
193 debug3("%s entering", __func__);
196 buffer_put_int(&m, kex->host_key_index(key));
197 buffer_put_string(&m, data, datalen);
199 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
201 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
202 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
203 *sigp = buffer_get_string(&m, lenp);
210 mm_getpwnamallow(const char *username)
215 ServerOptions *newopts;
217 debug3("%s entering", __func__);
220 buffer_put_cstring(&m, username);
222 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
224 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
225 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
227 if (buffer_get_char(&m) == 0) {
231 pw = buffer_get_string(&m, &len);
232 if (len != sizeof(struct passwd))
233 fatal("%s: struct passwd size mismatch", __func__);
234 pw->pw_name = buffer_get_string(&m, NULL);
235 pw->pw_passwd = buffer_get_string(&m, NULL);
236 pw->pw_gecos = buffer_get_string(&m, NULL);
237 #ifdef HAVE_PW_CLASS_IN_PASSWD
238 pw->pw_class = buffer_get_string(&m, NULL);
240 pw->pw_dir = buffer_get_string(&m, NULL);
241 pw->pw_shell = buffer_get_string(&m, NULL);
244 /* copy options block as a Match directive may have changed some */
245 newopts = buffer_get_string(&m, &len);
246 if (len != sizeof(*newopts))
247 fatal("%s: option block size mismatch", __func__);
248 if (newopts->banner != NULL)
249 newopts->banner = buffer_get_string(&m, NULL);
250 copy_set_server_options(&options, newopts, 1);
259 mm_auth2_read_banner(void)
264 debug3("%s entering", __func__);
267 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
270 mm_request_receive_expect(pmonitor->m_recvfd,
271 MONITOR_ANS_AUTH2_READ_BANNER, &m);
272 banner = buffer_get_string(&m, NULL);
275 /* treat empty banner as missing banner */
276 if (strlen(banner) == 0) {
283 /* Inform the privileged process about service, style, and role */
286 mm_inform_authserv(char *service, char *style, char *role)
290 debug3("%s entering", __func__);
293 buffer_put_cstring(&m, service);
294 buffer_put_cstring(&m, style ? style : "");
295 buffer_put_cstring(&m, role ? role : "");
297 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
302 /* Inform the privileged process about role */
305 mm_inform_authrole(char *role)
309 debug3("%s entering", __func__);
312 buffer_put_cstring(&m, role ? role : "");
314 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHROLE, &m);
319 /* Do the password authentication */
321 mm_auth_password(Authctxt *authctxt, char *password)
324 int authenticated = 0;
326 debug3("%s entering", __func__);
329 buffer_put_cstring(&m, password);
330 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
332 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
333 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
335 authenticated = buffer_get_int(&m);
339 debug3("%s: user %sauthenticated",
340 __func__, authenticated ? "" : "not ");
341 return (authenticated);
345 mm_user_key_allowed(struct passwd *pw, Key *key)
347 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
351 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
354 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
358 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
359 char *host, Key *key)
363 key->type = KEY_RSA; /* XXX hack for key_to_blob */
364 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
365 key->type = KEY_RSA1;
370 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
375 int allowed = 0, have_forced = 0;
377 debug3("%s entering", __func__);
379 /* Convert the key to a blob and the pass it over */
380 if (!key_to_blob(key, &blob, &len))
384 buffer_put_int(&m, type);
385 buffer_put_cstring(&m, user ? user : "");
386 buffer_put_cstring(&m, host ? host : "");
387 buffer_put_string(&m, blob, len);
390 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
392 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
393 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
395 allowed = buffer_get_int(&m);
397 /* fake forced command */
398 auth_clear_options();
399 have_forced = buffer_get_int(&m);
400 forced_command = have_forced ? xstrdup("true") : NULL;
408 * This key verify needs to send the key type along, because the
409 * privileged parent makes the decision if the key is allowed
410 * for authentication.
414 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
421 debug3("%s entering", __func__);
423 /* Convert the key to a blob and the pass it over */
424 if (!key_to_blob(key, &blob, &len))
428 buffer_put_string(&m, blob, len);
429 buffer_put_string(&m, sig, siglen);
430 buffer_put_string(&m, data, datalen);
433 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
435 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
436 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
438 verified = buffer_get_int(&m);
445 /* Export key state after authentication */
447 mm_newkeys_from_blob(u_char *blob, int blen)
451 Newkeys *newkey = NULL;
456 debug3("%s: %p(%d)", __func__, blob, blen);
458 dump_base64(stderr, blob, blen);
461 buffer_append(&b, blob, blen);
463 newkey = xmalloc(sizeof(*newkey));
466 comp = &newkey->comp;
469 enc->name = buffer_get_string(&b, NULL);
470 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
471 enc->enabled = buffer_get_int(&b);
472 enc->block_size = buffer_get_int(&b);
473 enc->key = buffer_get_string(&b, &enc->key_len);
474 enc->iv = buffer_get_string(&b, &len);
475 if (len != enc->block_size)
476 fatal("%s: bad ivlen: expected %u != %u", __func__,
477 enc->block_size, len);
479 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
480 fatal("%s: bad cipher name %s or pointer %p", __func__,
481 enc->name, enc->cipher);
484 mac->name = buffer_get_string(&b, NULL);
485 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
486 fatal("%s: can not setup mac %s", __func__, mac->name);
487 mac->enabled = buffer_get_int(&b);
488 mac->key = buffer_get_string(&b, &len);
489 if (len > mac->key_len)
490 fatal("%s: bad mac key length: %u > %d", __func__, len,
495 comp->type = buffer_get_int(&b);
496 comp->enabled = buffer_get_int(&b);
497 comp->name = buffer_get_string(&b, NULL);
499 len = buffer_len(&b);
501 error("newkeys_from_blob: remaining bytes in blob %u", len);
507 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
514 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
516 debug3("%s: converting %p", __func__, newkey);
518 if (newkey == NULL) {
519 error("%s: newkey == NULL", __func__);
524 comp = &newkey->comp;
528 buffer_put_cstring(&b, enc->name);
529 /* The cipher struct is constant and shared, you export pointer */
530 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
531 buffer_put_int(&b, enc->enabled);
532 buffer_put_int(&b, enc->block_size);
533 buffer_put_string(&b, enc->key, enc->key_len);
534 packet_get_keyiv(mode, enc->iv, enc->block_size);
535 buffer_put_string(&b, enc->iv, enc->block_size);
538 buffer_put_cstring(&b, mac->name);
539 buffer_put_int(&b, mac->enabled);
540 buffer_put_string(&b, mac->key, mac->key_len);
543 buffer_put_int(&b, comp->type);
544 buffer_put_int(&b, comp->enabled);
545 buffer_put_cstring(&b, comp->name);
547 len = buffer_len(&b);
551 *blobp = xmalloc(len);
552 memcpy(*blobp, buffer_ptr(&b), len);
554 memset(buffer_ptr(&b), 0, len);
560 mm_send_kex(Buffer *m, Kex *kex)
562 buffer_put_string(m, kex->session_id, kex->session_id_len);
563 buffer_put_int(m, kex->we_need);
564 buffer_put_int(m, kex->hostkey_type);
565 buffer_put_int(m, kex->kex_type);
566 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
567 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
568 buffer_put_int(m, kex->flags);
569 buffer_put_cstring(m, kex->client_version_string);
570 buffer_put_cstring(m, kex->server_version_string);
574 mm_send_keystate(struct monitor *monitor)
576 Buffer m, *input, *output;
579 u_int32_t seqnr, packets;
580 u_int64_t blocks, bytes;
589 buffer_put_int(&m, packet_get_protocol_flags());
591 buffer_put_int(&m, packet_get_ssh1_cipher());
593 debug3("%s: Sending ssh1 KEY+IV", __func__);
594 keylen = packet_get_encryption_key(NULL);
595 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
596 keylen = packet_get_encryption_key(key);
597 buffer_put_string(&m, key, keylen);
598 memset(key, 0, keylen);
601 ivlen = packet_get_keyiv_len(MODE_OUT);
602 packet_get_keyiv(MODE_OUT, iv, ivlen);
603 buffer_put_string(&m, iv, ivlen);
604 ivlen = packet_get_keyiv_len(MODE_OUT);
605 packet_get_keyiv(MODE_IN, iv, ivlen);
606 buffer_put_string(&m, iv, ivlen);
609 /* Kex for rekeying */
610 mm_send_kex(&m, *monitor->m_pkex);
613 debug3("%s: Sending new keys: %p %p",
614 __func__, packet_get_newkeys(MODE_OUT),
615 packet_get_newkeys(MODE_IN));
618 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
619 fatal("%s: conversion of newkeys failed", __func__);
621 buffer_put_string(&m, blob, bloblen);
624 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
625 fatal("%s: conversion of newkeys failed", __func__);
627 buffer_put_string(&m, blob, bloblen);
630 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
631 buffer_put_int(&m, seqnr);
632 buffer_put_int64(&m, blocks);
633 buffer_put_int(&m, packets);
634 buffer_put_int64(&m, bytes);
635 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
636 buffer_put_int(&m, seqnr);
637 buffer_put_int64(&m, blocks);
638 buffer_put_int(&m, packets);
639 buffer_put_int64(&m, bytes);
641 debug3("%s: New keys have been sent", __func__);
643 /* More key context */
644 plen = packet_get_keycontext(MODE_OUT, NULL);
646 packet_get_keycontext(MODE_OUT, p);
647 buffer_put_string(&m, p, plen);
650 plen = packet_get_keycontext(MODE_IN, NULL);
652 packet_get_keycontext(MODE_IN, p);
653 buffer_put_string(&m, p, plen);
656 /* Compression state */
657 debug3("%s: Sending compression state", __func__);
658 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
659 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
661 /* Network I/O buffers */
662 input = (Buffer *)packet_get_input();
663 output = (Buffer *)packet_get_output();
664 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
665 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
669 buffer_put_int64(&m, get_sent_bytes());
670 buffer_put_int64(&m, get_recv_bytes());
673 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
674 debug3("%s: Finished sending state", __func__);
680 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
684 int success = 0, tmp1 = -1, tmp2 = -1;
686 /* Kludge: ensure there are fds free to receive the pty/tty */
687 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
688 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
689 error("%s: cannot allocate fds for pty", __func__);
700 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
702 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
703 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
705 success = buffer_get_int(&m);
707 debug3("%s: pty alloc failed", __func__);
711 p = buffer_get_string(&m, NULL);
712 msg = buffer_get_string(&m, NULL);
715 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
718 buffer_append(&loginmsg, msg, strlen(msg));
721 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
722 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
723 fatal("%s: receive fds failed", __func__);
730 mm_session_pty_cleanup2(Session *s)
737 buffer_put_cstring(&m, s->tty);
738 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
741 /* closed dup'ed master */
742 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
743 error("close(s->ptymaster/%d): %s",
744 s->ptymaster, strerror(errno));
746 /* unlink pty from session */
752 mm_start_pam(Authctxt *authctxt)
756 debug3("%s entering", __func__);
757 if (!options.use_pam)
758 fatal("UsePAM=no, but ended up in %s anyway", __func__);
761 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
767 mm_do_pam_account(void)
773 debug3("%s entering", __func__);
774 if (!options.use_pam)
775 fatal("UsePAM=no, but ended up in %s anyway", __func__);
778 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
780 mm_request_receive_expect(pmonitor->m_recvfd,
781 MONITOR_ANS_PAM_ACCOUNT, &m);
782 ret = buffer_get_int(&m);
783 msg = buffer_get_string(&m, NULL);
784 buffer_append(&loginmsg, msg, strlen(msg));
789 debug3("%s returning %d", __func__, ret);
795 mm_sshpam_init_ctx(Authctxt *authctxt)
800 debug3("%s", __func__);
802 buffer_put_cstring(&m, authctxt->user);
803 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
804 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
805 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
806 success = buffer_get_int(&m);
808 debug3("%s: pam_init_ctx failed", __func__);
817 mm_sshpam_query(void *ctx, char **name, char **info,
818 u_int *num, char ***prompts, u_int **echo_on)
824 debug3("%s", __func__);
826 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
827 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
828 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
829 ret = buffer_get_int(&m);
830 debug3("%s: pam_query returned %d", __func__, ret);
831 *name = buffer_get_string(&m, NULL);
832 *info = buffer_get_string(&m, NULL);
833 *num = buffer_get_int(&m);
834 if (*num > PAM_MAX_NUM_MSG)
835 fatal("%s: recieved %u PAM messages, expected <= %u",
836 __func__, *num, PAM_MAX_NUM_MSG);
837 *prompts = xcalloc((*num + 1), sizeof(char *));
838 *echo_on = xcalloc((*num + 1), sizeof(u_int));
839 for (i = 0; i < *num; ++i) {
840 (*prompts)[i] = buffer_get_string(&m, NULL);
841 (*echo_on)[i] = buffer_get_int(&m);
848 mm_sshpam_respond(void *ctx, u_int num, char **resp)
854 debug3("%s", __func__);
856 buffer_put_int(&m, num);
857 for (i = 0; i < num; ++i)
858 buffer_put_cstring(&m, resp[i]);
859 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
860 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
861 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
862 ret = buffer_get_int(&m);
863 debug3("%s: pam_respond returned %d", __func__, ret);
869 mm_sshpam_free_ctx(void *ctxtp)
873 debug3("%s", __func__);
875 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
876 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
877 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
882 /* Request process termination */
890 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
895 mm_ssh1_session_key(BIGNUM *num)
901 buffer_put_bignum2(&m, num);
902 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
904 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
906 rsafail = buffer_get_int(&m);
907 buffer_get_bignum2(&m, num);
915 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
916 char ***prompts, u_int **echo_on)
919 *infotxt = xstrdup("");
921 *prompts = xcalloc(*numprompts, sizeof(char *));
922 *echo_on = xcalloc(*numprompts, sizeof(u_int));
927 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
928 u_int *numprompts, char ***prompts, u_int **echo_on)
934 debug3("%s: entering", __func__);
937 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
939 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
941 success = buffer_get_int(&m);
943 debug3("%s: no challenge", __func__);
948 /* Get the challenge, and format the response */
949 challenge = buffer_get_string(&m, NULL);
952 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
953 (*prompts)[0] = challenge;
955 debug3("%s: received challenge: %s", __func__, challenge);
961 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
966 debug3("%s: entering", __func__);
967 if (numresponses != 1)
971 buffer_put_cstring(&m, responses[0]);
972 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
974 mm_request_receive_expect(pmonitor->m_recvfd,
975 MONITOR_ANS_BSDAUTHRESPOND, &m);
977 authok = buffer_get_int(&m);
980 return ((authok == 0) ? -1 : 0);
985 mm_skey_query(void *ctx, char **name, char **infotxt,
986 u_int *numprompts, char ***prompts, u_int **echo_on)
992 debug3("%s: entering", __func__);
995 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
997 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
999 success = buffer_get_int(&m);
1001 debug3("%s: no challenge", __func__);
1006 /* Get the challenge, and format the response */
1007 challenge = buffer_get_string(&m, NULL);
1010 debug3("%s: received challenge: %s", __func__, challenge);
1012 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1014 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1021 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1026 debug3("%s: entering", __func__);
1027 if (numresponses != 1)
1031 buffer_put_cstring(&m, responses[0]);
1032 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1034 mm_request_receive_expect(pmonitor->m_recvfd,
1035 MONITOR_ANS_SKEYRESPOND, &m);
1037 authok = buffer_get_int(&m);
1040 return ((authok == 0) ? -1 : 0);
1045 mm_ssh1_session_id(u_char session_id[16])
1050 debug3("%s entering", __func__);
1053 for (i = 0; i < 16; i++)
1054 buffer_put_char(&m, session_id[i]);
1056 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1061 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1067 int allowed = 0, have_forced = 0;
1069 debug3("%s entering", __func__);
1072 buffer_put_bignum2(&m, client_n);
1074 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1075 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1077 allowed = buffer_get_int(&m);
1079 /* fake forced command */
1080 auth_clear_options();
1081 have_forced = buffer_get_int(&m);
1082 forced_command = have_forced ? xstrdup("true") : NULL;
1084 if (allowed && rkey != NULL) {
1085 blob = buffer_get_string(&m, &blen);
1086 if ((key = key_from_blob(blob, blen)) == NULL)
1087 fatal("%s: key_from_blob failed", __func__);
1097 mm_auth_rsa_generate_challenge(Key *key)
1104 debug3("%s entering", __func__);
1106 if ((challenge = BN_new()) == NULL)
1107 fatal("%s: BN_new failed", __func__);
1109 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1110 if (key_to_blob(key, &blob, &blen) == 0)
1111 fatal("%s: key_to_blob failed", __func__);
1112 key->type = KEY_RSA1;
1115 buffer_put_string(&m, blob, blen);
1118 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1119 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1121 buffer_get_bignum2(&m, challenge);
1128 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1135 debug3("%s entering", __func__);
1137 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1138 if (key_to_blob(key, &blob, &blen) == 0)
1139 fatal("%s: key_to_blob failed", __func__);
1140 key->type = KEY_RSA1;
1143 buffer_put_string(&m, blob, blen);
1144 buffer_put_string(&m, response, 16);
1147 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1148 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1150 success = buffer_get_int(&m);
1156 #ifdef SSH_AUDIT_EVENTS
1158 mm_audit_event(ssh_audit_event_t event)
1162 debug3("%s entering", __func__);
1165 buffer_put_int(&m, event);
1167 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1172 mm_audit_run_command(const char *command)
1176 debug3("%s entering command %s", __func__, command);
1179 buffer_put_cstring(&m, command);
1181 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1184 #endif /* SSH_AUDIT_EVENTS */
1188 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1193 /* Client doesn't get to see the context */
1197 buffer_put_string(&m, goid->elements, goid->length);
1199 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1200 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1202 major = buffer_get_int(&m);
1209 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1210 gss_buffer_desc *out, OM_uint32 *flags)
1217 buffer_put_string(&m, in->value, in->length);
1219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1220 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1222 major = buffer_get_int(&m);
1223 out->value = buffer_get_string(&m, &len);
1226 *flags = buffer_get_int(&m);
1234 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1240 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1241 buffer_put_string(&m, gssmic->value, gssmic->length);
1243 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1244 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1247 major = buffer_get_int(&m);
1253 mm_ssh_gssapi_userok(char *user, struct passwd *pw)
1256 int authenticated = 0;
1260 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1261 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1264 authenticated = buffer_get_int(&m);
1267 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1268 return (authenticated);
1272 mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash)
1279 buffer_put_string(&m, data->value, data->length);
1281 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m);
1282 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m);
1284 major = buffer_get_int(&m);
1285 hash->value = buffer_get_string(&m, &len);
1294 mm_ssh_gssapi_update_creds(ssh_gssapi_ccache *store)
1301 buffer_put_cstring(&m, store->filename ? store->filename : "");
1302 buffer_put_cstring(&m, store->envvar ? store->envvar : "");
1303 buffer_put_cstring(&m, store->envval ? store->envval : "");
1305 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUPCREDS, &m);
1306 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUPCREDS, &m);
1308 ok = buffer_get_int(&m);
1319 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1320 char **hash_scheme, char **salt)
1324 debug3("%s entering", __func__);
1327 mm_request_send(pmonitor->m_recvfd,
1328 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1330 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1331 mm_request_receive_expect(pmonitor->m_recvfd,
1332 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1334 *hash_scheme = buffer_get_string(&m, NULL);
1335 *salt = buffer_get_string(&m, NULL);
1341 mm_jpake_step1(struct modp_group *grp,
1342 u_char **id, u_int *id_len,
1343 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1344 u_char **priv1_proof, u_int *priv1_proof_len,
1345 u_char **priv2_proof, u_int *priv2_proof_len)
1349 debug3("%s entering", __func__);
1352 mm_request_send(pmonitor->m_recvfd,
1353 MONITOR_REQ_JPAKE_STEP1, &m);
1355 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1356 mm_request_receive_expect(pmonitor->m_recvfd,
1357 MONITOR_ANS_JPAKE_STEP1, &m);
1359 if ((*priv1 = BN_new()) == NULL ||
1360 (*priv2 = BN_new()) == NULL ||
1361 (*g_priv1 = BN_new()) == NULL ||
1362 (*g_priv2 = BN_new()) == NULL)
1363 fatal("%s: BN_new", __func__);
1365 *id = buffer_get_string(&m, id_len);
1366 /* priv1 and priv2 are, well, private */
1367 buffer_get_bignum2(&m, *g_priv1);
1368 buffer_get_bignum2(&m, *g_priv2);
1369 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1370 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1376 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1377 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1378 const u_char *theirid, u_int theirid_len,
1379 const u_char *myid, u_int myid_len,
1380 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1381 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1383 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1387 debug3("%s entering", __func__);
1390 /* monitor already has all bignums except theirpub1, theirpub2 */
1391 buffer_put_bignum2(&m, theirpub1);
1392 buffer_put_bignum2(&m, theirpub2);
1393 /* monitor already knows our id */
1394 buffer_put_string(&m, theirid, theirid_len);
1395 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1396 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1398 mm_request_send(pmonitor->m_recvfd,
1399 MONITOR_REQ_JPAKE_STEP2, &m);
1401 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1402 mm_request_receive_expect(pmonitor->m_recvfd,
1403 MONITOR_ANS_JPAKE_STEP2, &m);
1405 if ((*newpub = BN_new()) == NULL)
1406 fatal("%s: BN_new", __func__);
1408 buffer_get_bignum2(&m, *newpub);
1409 *newpub_exponent_proof = buffer_get_string(&m,
1410 newpub_exponent_proof_len);
1416 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1417 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1418 BIGNUM *theirpub1, BIGNUM *theirpub2,
1419 const u_char *my_id, u_int my_id_len,
1420 const u_char *their_id, u_int their_id_len,
1421 const u_char *sess_id, u_int sess_id_len,
1422 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1424 u_char **confirm_hash, u_int *confirm_hash_len)
1428 debug3("%s entering", __func__);
1431 /* monitor already has all bignums except step2_val */
1432 buffer_put_bignum2(&m, step2_val);
1433 /* monitor already knows all the ids */
1434 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1436 mm_request_send(pmonitor->m_recvfd,
1437 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1439 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1440 mm_request_receive_expect(pmonitor->m_recvfd,
1441 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1443 /* 'k' is sensitive and stays in the monitor */
1444 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1450 mm_jpake_check_confirm(const BIGNUM *k,
1451 const u_char *peer_id, u_int peer_id_len,
1452 const u_char *sess_id, u_int sess_id_len,
1453 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1458 debug3("%s entering", __func__);
1461 /* k is dummy in slave, ignored */
1462 /* monitor knows all the ids */
1463 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1464 mm_request_send(pmonitor->m_recvfd,
1465 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1467 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1468 mm_request_receive_expect(pmonitor->m_recvfd,
1469 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1471 success = buffer_get_int(&m);
1474 debug3("%s: success = %d", __func__, success);