1 /* $OpenBSD: monitor_wrap.c,v 1.66 2009/05/25 06:48:01 andreas Exp $ */
3 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
4 * Copyright 2002 Markus Friedl <markus@openbsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/types.h>
41 #include <openssl/bn.h>
42 #include <openssl/dh.h>
43 #include <openssl/evp.h>
45 #include "openbsd-compat/sys-queue.h"
55 #include "auth-options.h"
59 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
62 #define TARGET_OS_MAC 1
70 #include "monitor_wrap.h"
72 #include "monitor_fdpass.h"
83 extern z_stream incoming_stream;
84 extern z_stream outgoing_stream;
85 extern struct monitor *pmonitor;
86 extern Buffer loginmsg;
87 extern ServerOptions options;
93 * m_pid is only set in the privileged part, and
94 * points to the unprivileged child.
96 return (pmonitor && pmonitor->m_pid > 0);
100 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
102 u_int mlen = buffer_len(m);
105 debug3("%s entering: type %d", __func__, type);
107 put_u32(buf, mlen + 1);
108 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
109 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
110 fatal("%s: write: %s", __func__, strerror(errno));
111 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
112 fatal("%s: write: %s", __func__, strerror(errno));
116 mm_request_receive(int sock, Buffer *m)
121 debug3("%s entering", __func__);
123 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
126 fatal("%s: read: %s", __func__, strerror(errno));
128 msg_len = get_u32(buf);
129 if (msg_len > 256 * 1024)
130 fatal("%s: read: bad msg_len %d", __func__, msg_len);
132 buffer_append_space(m, msg_len);
133 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
134 fatal("%s: read: %s", __func__, strerror(errno));
138 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
142 debug3("%s entering: type %d", __func__, type);
144 mm_request_receive(sock, m);
145 rtype = buffer_get_char(m);
147 fatal("%s: read: rtype %d != type %d", __func__,
152 mm_choose_dh(int min, int nbits, int max)
159 buffer_put_int(&m, min);
160 buffer_put_int(&m, nbits);
161 buffer_put_int(&m, max);
163 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
165 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
166 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
168 success = buffer_get_char(&m);
170 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
172 if ((p = BN_new()) == NULL)
173 fatal("%s: BN_new failed", __func__);
174 if ((g = BN_new()) == NULL)
175 fatal("%s: BN_new failed", __func__);
176 buffer_get_bignum2(&m, p);
177 buffer_get_bignum2(&m, g);
179 debug3("%s: remaining %d", __func__, buffer_len(&m));
182 return (dh_new_group(g, p));
186 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
188 Kex *kex = *pmonitor->m_pkex;
191 debug3("%s entering", __func__);
194 buffer_put_int(&m, kex->host_key_index(key));
195 buffer_put_string(&m, data, datalen);
197 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
199 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
200 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
201 *sigp = buffer_get_string(&m, lenp);
208 mm_getpwnamallow(const char *username)
213 ServerOptions *newopts;
215 debug3("%s entering", __func__);
218 buffer_put_cstring(&m, username);
220 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
222 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
223 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
225 if (buffer_get_char(&m) == 0) {
229 pw = buffer_get_string(&m, &len);
230 if (len != sizeof(struct passwd))
231 fatal("%s: struct passwd size mismatch", __func__);
232 pw->pw_name = buffer_get_string(&m, NULL);
233 pw->pw_passwd = buffer_get_string(&m, NULL);
234 pw->pw_gecos = buffer_get_string(&m, NULL);
235 #ifdef HAVE_PW_CLASS_IN_PASSWD
236 pw->pw_class = buffer_get_string(&m, NULL);
238 pw->pw_dir = buffer_get_string(&m, NULL);
239 pw->pw_shell = buffer_get_string(&m, NULL);
242 /* copy options block as a Match directive may have changed some */
243 newopts = buffer_get_string(&m, &len);
244 if (len != sizeof(*newopts))
245 fatal("%s: option block size mismatch", __func__);
246 if (newopts->banner != NULL)
247 newopts->banner = buffer_get_string(&m, NULL);
248 copy_set_server_options(&options, newopts, 1);
257 mm_auth2_read_banner(void)
262 debug3("%s entering", __func__);
265 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
268 mm_request_receive_expect(pmonitor->m_recvfd,
269 MONITOR_ANS_AUTH2_READ_BANNER, &m);
270 banner = buffer_get_string(&m, NULL);
273 /* treat empty banner as missing banner */
274 if (strlen(banner) == 0) {
281 /* Inform the privileged process about service and style */
284 mm_inform_authserv(char *service, char *style)
288 debug3("%s entering", __func__);
291 buffer_put_cstring(&m, service);
292 buffer_put_cstring(&m, style ? style : "");
294 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
299 /* Do the password authentication */
301 mm_auth_password(Authctxt *authctxt, char *password)
304 int authenticated = 0;
306 debug3("%s entering", __func__);
309 buffer_put_cstring(&m, password);
310 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
312 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
313 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
315 authenticated = buffer_get_int(&m);
319 debug3("%s: user %sauthenticated",
320 __func__, authenticated ? "" : "not ");
321 return (authenticated);
325 mm_user_key_allowed(struct passwd *pw, Key *key)
327 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
331 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
334 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
338 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
339 char *host, Key *key)
343 key->type = KEY_RSA; /* XXX hack for key_to_blob */
344 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
345 key->type = KEY_RSA1;
350 mm_send_debug(Buffer *m)
354 while (buffer_len(m)) {
355 msg = buffer_get_string(m, NULL);
356 debug3("%s: Sending debug: %s", __func__, msg);
357 packet_send_debug("%s", msg);
363 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
368 int allowed = 0, have_forced = 0;
370 debug3("%s entering", __func__);
372 /* Convert the key to a blob and the pass it over */
373 if (!key_to_blob(key, &blob, &len))
377 buffer_put_int(&m, type);
378 buffer_put_cstring(&m, user ? user : "");
379 buffer_put_cstring(&m, host ? host : "");
380 buffer_put_string(&m, blob, len);
383 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
385 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
386 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
388 allowed = buffer_get_int(&m);
390 /* fake forced command */
391 auth_clear_options();
392 have_forced = buffer_get_int(&m);
393 forced_command = have_forced ? xstrdup("true") : NULL;
395 /* Send potential debug messages */
404 * This key verify needs to send the key type along, because the
405 * privileged parent makes the decision if the key is allowed
406 * for authentication.
410 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
417 debug3("%s entering", __func__);
419 /* Convert the key to a blob and the pass it over */
420 if (!key_to_blob(key, &blob, &len))
424 buffer_put_string(&m, blob, len);
425 buffer_put_string(&m, sig, siglen);
426 buffer_put_string(&m, data, datalen);
429 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
431 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
432 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
434 verified = buffer_get_int(&m);
441 /* Export key state after authentication */
443 mm_newkeys_from_blob(u_char *blob, int blen)
447 Newkeys *newkey = NULL;
452 debug3("%s: %p(%d)", __func__, blob, blen);
454 dump_base64(stderr, blob, blen);
457 buffer_append(&b, blob, blen);
459 newkey = xmalloc(sizeof(*newkey));
462 comp = &newkey->comp;
465 enc->name = buffer_get_string(&b, NULL);
466 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
467 enc->enabled = buffer_get_int(&b);
468 enc->block_size = buffer_get_int(&b);
469 enc->key = buffer_get_string(&b, &enc->key_len);
470 enc->iv = buffer_get_string(&b, &len);
471 if (len != enc->block_size)
472 fatal("%s: bad ivlen: expected %u != %u", __func__,
473 enc->block_size, len);
475 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
476 fatal("%s: bad cipher name %s or pointer %p", __func__,
477 enc->name, enc->cipher);
480 mac->name = buffer_get_string(&b, NULL);
481 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
482 fatal("%s: can not setup mac %s", __func__, mac->name);
483 mac->enabled = buffer_get_int(&b);
484 mac->key = buffer_get_string(&b, &len);
485 if (len > mac->key_len)
486 fatal("%s: bad mac key length: %u > %d", __func__, len,
491 comp->type = buffer_get_int(&b);
492 comp->enabled = buffer_get_int(&b);
493 comp->name = buffer_get_string(&b, NULL);
495 len = buffer_len(&b);
497 error("newkeys_from_blob: remaining bytes in blob %u", len);
503 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
510 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
512 debug3("%s: converting %p", __func__, newkey);
514 if (newkey == NULL) {
515 error("%s: newkey == NULL", __func__);
520 comp = &newkey->comp;
524 buffer_put_cstring(&b, enc->name);
525 /* The cipher struct is constant and shared, you export pointer */
526 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
527 buffer_put_int(&b, enc->enabled);
528 buffer_put_int(&b, enc->block_size);
529 buffer_put_string(&b, enc->key, enc->key_len);
530 packet_get_keyiv(mode, enc->iv, enc->block_size);
531 buffer_put_string(&b, enc->iv, enc->block_size);
534 buffer_put_cstring(&b, mac->name);
535 buffer_put_int(&b, mac->enabled);
536 buffer_put_string(&b, mac->key, mac->key_len);
539 buffer_put_int(&b, comp->type);
540 buffer_put_int(&b, comp->enabled);
541 buffer_put_cstring(&b, comp->name);
543 len = buffer_len(&b);
547 *blobp = xmalloc(len);
548 memcpy(*blobp, buffer_ptr(&b), len);
550 memset(buffer_ptr(&b), 0, len);
556 mm_send_kex(Buffer *m, Kex *kex)
558 buffer_put_string(m, kex->session_id, kex->session_id_len);
559 buffer_put_int(m, kex->we_need);
560 buffer_put_int(m, kex->hostkey_type);
561 buffer_put_int(m, kex->kex_type);
562 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
563 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
564 buffer_put_int(m, kex->flags);
565 buffer_put_cstring(m, kex->client_version_string);
566 buffer_put_cstring(m, kex->server_version_string);
570 mm_send_keystate(struct monitor *monitor)
572 Buffer m, *input, *output;
575 u_int32_t seqnr, packets;
576 u_int64_t blocks, bytes;
585 buffer_put_int(&m, packet_get_protocol_flags());
587 buffer_put_int(&m, packet_get_ssh1_cipher());
589 debug3("%s: Sending ssh1 KEY+IV", __func__);
590 keylen = packet_get_encryption_key(NULL);
591 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
592 keylen = packet_get_encryption_key(key);
593 buffer_put_string(&m, key, keylen);
594 memset(key, 0, keylen);
597 ivlen = packet_get_keyiv_len(MODE_OUT);
598 packet_get_keyiv(MODE_OUT, iv, ivlen);
599 buffer_put_string(&m, iv, ivlen);
600 ivlen = packet_get_keyiv_len(MODE_OUT);
601 packet_get_keyiv(MODE_IN, iv, ivlen);
602 buffer_put_string(&m, iv, ivlen);
605 /* Kex for rekeying */
606 mm_send_kex(&m, *monitor->m_pkex);
609 debug3("%s: Sending new keys: %p %p",
610 __func__, packet_get_newkeys(MODE_OUT),
611 packet_get_newkeys(MODE_IN));
614 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
615 fatal("%s: conversion of newkeys failed", __func__);
617 buffer_put_string(&m, blob, bloblen);
620 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
621 fatal("%s: conversion of newkeys failed", __func__);
623 buffer_put_string(&m, blob, bloblen);
626 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
627 buffer_put_int(&m, seqnr);
628 buffer_put_int64(&m, blocks);
629 buffer_put_int(&m, packets);
630 buffer_put_int64(&m, bytes);
631 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
632 buffer_put_int(&m, seqnr);
633 buffer_put_int64(&m, blocks);
634 buffer_put_int(&m, packets);
635 buffer_put_int64(&m, bytes);
637 debug3("%s: New keys have been sent", __func__);
639 /* More key context */
640 plen = packet_get_keycontext(MODE_OUT, NULL);
642 packet_get_keycontext(MODE_OUT, p);
643 buffer_put_string(&m, p, plen);
646 plen = packet_get_keycontext(MODE_IN, NULL);
648 packet_get_keycontext(MODE_IN, p);
649 buffer_put_string(&m, p, plen);
652 /* Compression state */
653 debug3("%s: Sending compression state", __func__);
654 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
655 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
657 /* Network I/O buffers */
658 input = (Buffer *)packet_get_input();
659 output = (Buffer *)packet_get_output();
660 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
661 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
663 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
664 debug3("%s: Finished sending state", __func__);
670 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
674 int success = 0, tmp1 = -1, tmp2 = -1;
676 /* Kludge: ensure there are fds free to receive the pty/tty */
677 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
678 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
679 error("%s: cannot allocate fds for pty", __func__);
690 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
692 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
693 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
695 success = buffer_get_int(&m);
697 debug3("%s: pty alloc failed", __func__);
701 p = buffer_get_string(&m, NULL);
702 msg = buffer_get_string(&m, NULL);
705 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
708 buffer_append(&loginmsg, msg, strlen(msg));
711 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
712 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
713 fatal("%s: receive fds failed", __func__);
720 mm_session_pty_cleanup2(Session *s)
727 buffer_put_cstring(&m, s->tty);
728 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
731 /* closed dup'ed master */
732 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
733 error("close(s->ptymaster/%d): %s",
734 s->ptymaster, strerror(errno));
736 /* unlink pty from session */
742 mm_start_pam(Authctxt *authctxt)
746 debug3("%s entering", __func__);
747 if (!options.use_pam)
748 fatal("UsePAM=no, but ended up in %s anyway", __func__);
751 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
757 mm_do_pam_account(void)
763 debug3("%s entering", __func__);
764 if (!options.use_pam)
765 fatal("UsePAM=no, but ended up in %s anyway", __func__);
768 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
770 mm_request_receive_expect(pmonitor->m_recvfd,
771 MONITOR_ANS_PAM_ACCOUNT, &m);
772 ret = buffer_get_int(&m);
773 msg = buffer_get_string(&m, NULL);
774 buffer_append(&loginmsg, msg, strlen(msg));
779 debug3("%s returning %d", __func__, ret);
785 mm_sshpam_init_ctx(Authctxt *authctxt)
790 debug3("%s", __func__);
792 buffer_put_cstring(&m, authctxt->user);
793 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
794 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
795 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
796 success = buffer_get_int(&m);
798 debug3("%s: pam_init_ctx failed", __func__);
807 mm_sshpam_query(void *ctx, char **name, char **info,
808 u_int *num, char ***prompts, u_int **echo_on)
814 debug3("%s", __func__);
816 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
817 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
818 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
819 ret = buffer_get_int(&m);
820 debug3("%s: pam_query returned %d", __func__, ret);
821 *name = buffer_get_string(&m, NULL);
822 *info = buffer_get_string(&m, NULL);
823 *num = buffer_get_int(&m);
824 if (*num > PAM_MAX_NUM_MSG)
825 fatal("%s: recieved %u PAM messages, expected <= %u",
826 __func__, *num, PAM_MAX_NUM_MSG);
827 *prompts = xcalloc((*num + 1), sizeof(char *));
828 *echo_on = xcalloc((*num + 1), sizeof(u_int));
829 for (i = 0; i < *num; ++i) {
830 (*prompts)[i] = buffer_get_string(&m, NULL);
831 (*echo_on)[i] = buffer_get_int(&m);
838 mm_sshpam_respond(void *ctx, u_int num, char **resp)
844 debug3("%s", __func__);
846 buffer_put_int(&m, num);
847 for (i = 0; i < num; ++i)
848 buffer_put_cstring(&m, resp[i]);
849 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
850 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
851 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
852 ret = buffer_get_int(&m);
853 debug3("%s: pam_respond returned %d", __func__, ret);
859 mm_sshpam_free_ctx(void *ctxtp)
863 debug3("%s", __func__);
865 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
866 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
867 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
872 /* Request process termination */
880 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
885 mm_ssh1_session_key(BIGNUM *num)
891 buffer_put_bignum2(&m, num);
892 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
894 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
896 rsafail = buffer_get_int(&m);
897 buffer_get_bignum2(&m, num);
905 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
906 char ***prompts, u_int **echo_on)
909 *infotxt = xstrdup("");
911 *prompts = xcalloc(*numprompts, sizeof(char *));
912 *echo_on = xcalloc(*numprompts, sizeof(u_int));
917 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
918 u_int *numprompts, char ***prompts, u_int **echo_on)
924 debug3("%s: entering", __func__);
927 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
929 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
931 success = buffer_get_int(&m);
933 debug3("%s: no challenge", __func__);
938 /* Get the challenge, and format the response */
939 challenge = buffer_get_string(&m, NULL);
942 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
943 (*prompts)[0] = challenge;
945 debug3("%s: received challenge: %s", __func__, challenge);
951 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
956 debug3("%s: entering", __func__);
957 if (numresponses != 1)
961 buffer_put_cstring(&m, responses[0]);
962 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
964 mm_request_receive_expect(pmonitor->m_recvfd,
965 MONITOR_ANS_BSDAUTHRESPOND, &m);
967 authok = buffer_get_int(&m);
970 return ((authok == 0) ? -1 : 0);
975 mm_skey_query(void *ctx, char **name, char **infotxt,
976 u_int *numprompts, char ***prompts, u_int **echo_on)
982 debug3("%s: entering", __func__);
985 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
987 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
989 success = buffer_get_int(&m);
991 debug3("%s: no challenge", __func__);
996 /* Get the challenge, and format the response */
997 challenge = buffer_get_string(&m, NULL);
1000 debug3("%s: received challenge: %s", __func__, challenge);
1002 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1004 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1011 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1016 debug3("%s: entering", __func__);
1017 if (numresponses != 1)
1021 buffer_put_cstring(&m, responses[0]);
1022 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1024 mm_request_receive_expect(pmonitor->m_recvfd,
1025 MONITOR_ANS_SKEYRESPOND, &m);
1027 authok = buffer_get_int(&m);
1030 return ((authok == 0) ? -1 : 0);
1035 mm_ssh1_session_id(u_char session_id[16])
1040 debug3("%s entering", __func__);
1043 for (i = 0; i < 16; i++)
1044 buffer_put_char(&m, session_id[i]);
1046 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1051 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1057 int allowed = 0, have_forced = 0;
1059 debug3("%s entering", __func__);
1062 buffer_put_bignum2(&m, client_n);
1064 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1065 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1067 allowed = buffer_get_int(&m);
1069 /* fake forced command */
1070 auth_clear_options();
1071 have_forced = buffer_get_int(&m);
1072 forced_command = have_forced ? xstrdup("true") : NULL;
1074 if (allowed && rkey != NULL) {
1075 blob = buffer_get_string(&m, &blen);
1076 if ((key = key_from_blob(blob, blen)) == NULL)
1077 fatal("%s: key_from_blob failed", __func__);
1088 mm_auth_rsa_generate_challenge(Key *key)
1095 debug3("%s entering", __func__);
1097 if ((challenge = BN_new()) == NULL)
1098 fatal("%s: BN_new failed", __func__);
1100 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1101 if (key_to_blob(key, &blob, &blen) == 0)
1102 fatal("%s: key_to_blob failed", __func__);
1103 key->type = KEY_RSA1;
1106 buffer_put_string(&m, blob, blen);
1109 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1110 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1112 buffer_get_bignum2(&m, challenge);
1119 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1126 debug3("%s entering", __func__);
1128 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1129 if (key_to_blob(key, &blob, &blen) == 0)
1130 fatal("%s: key_to_blob failed", __func__);
1131 key->type = KEY_RSA1;
1134 buffer_put_string(&m, blob, blen);
1135 buffer_put_string(&m, response, 16);
1138 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1139 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1141 success = buffer_get_int(&m);
1147 #ifdef SSH_AUDIT_EVENTS
1149 mm_audit_event(ssh_audit_event_t event)
1153 debug3("%s entering", __func__);
1156 buffer_put_int(&m, event);
1158 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1163 mm_audit_run_command(const char *command)
1167 debug3("%s entering command %s", __func__, command);
1170 buffer_put_cstring(&m, command);
1172 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1175 #endif /* SSH_AUDIT_EVENTS */
1179 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1184 /* Client doesn't get to see the context */
1188 buffer_put_string(&m, goid->elements, goid->length);
1190 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1191 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1193 major = buffer_get_int(&m);
1200 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1201 gss_buffer_desc *out, OM_uint32 *flags)
1208 buffer_put_string(&m, in->value, in->length);
1210 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1211 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1213 major = buffer_get_int(&m);
1214 out->value = buffer_get_string(&m, &len);
1217 *flags = buffer_get_int(&m);
1225 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1231 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1232 buffer_put_string(&m, gssmic->value, gssmic->length);
1234 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1235 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1238 major = buffer_get_int(&m);
1244 mm_ssh_gssapi_userok(char *user)
1247 int authenticated = 0;
1251 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1252 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1255 authenticated = buffer_get_int(&m);
1258 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1259 return (authenticated);
1265 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1266 char **hash_scheme, char **salt)
1270 debug3("%s entering", __func__);
1273 mm_request_send(pmonitor->m_recvfd,
1274 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1276 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1277 mm_request_receive_expect(pmonitor->m_recvfd,
1278 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1280 *hash_scheme = buffer_get_string(&m, NULL);
1281 *salt = buffer_get_string(&m, NULL);
1287 mm_jpake_step1(struct modp_group *grp,
1288 u_char **id, u_int *id_len,
1289 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1290 u_char **priv1_proof, u_int *priv1_proof_len,
1291 u_char **priv2_proof, u_int *priv2_proof_len)
1295 debug3("%s entering", __func__);
1298 mm_request_send(pmonitor->m_recvfd,
1299 MONITOR_REQ_JPAKE_STEP1, &m);
1301 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1302 mm_request_receive_expect(pmonitor->m_recvfd,
1303 MONITOR_ANS_JPAKE_STEP1, &m);
1305 if ((*priv1 = BN_new()) == NULL ||
1306 (*priv2 = BN_new()) == NULL ||
1307 (*g_priv1 = BN_new()) == NULL ||
1308 (*g_priv2 = BN_new()) == NULL)
1309 fatal("%s: BN_new", __func__);
1311 *id = buffer_get_string(&m, id_len);
1312 /* priv1 and priv2 are, well, private */
1313 buffer_get_bignum2(&m, *g_priv1);
1314 buffer_get_bignum2(&m, *g_priv2);
1315 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1316 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1322 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1323 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1324 const u_char *theirid, u_int theirid_len,
1325 const u_char *myid, u_int myid_len,
1326 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1327 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1329 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1333 debug3("%s entering", __func__);
1336 /* monitor already has all bignums except theirpub1, theirpub2 */
1337 buffer_put_bignum2(&m, theirpub1);
1338 buffer_put_bignum2(&m, theirpub2);
1339 /* monitor already knows our id */
1340 buffer_put_string(&m, theirid, theirid_len);
1341 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1342 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1344 mm_request_send(pmonitor->m_recvfd,
1345 MONITOR_REQ_JPAKE_STEP2, &m);
1347 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1348 mm_request_receive_expect(pmonitor->m_recvfd,
1349 MONITOR_ANS_JPAKE_STEP2, &m);
1351 if ((*newpub = BN_new()) == NULL)
1352 fatal("%s: BN_new", __func__);
1354 buffer_get_bignum2(&m, *newpub);
1355 *newpub_exponent_proof = buffer_get_string(&m,
1356 newpub_exponent_proof_len);
1362 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1363 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1364 BIGNUM *theirpub1, BIGNUM *theirpub2,
1365 const u_char *my_id, u_int my_id_len,
1366 const u_char *their_id, u_int their_id_len,
1367 const u_char *sess_id, u_int sess_id_len,
1368 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1370 u_char **confirm_hash, u_int *confirm_hash_len)
1374 debug3("%s entering", __func__);
1377 /* monitor already has all bignums except step2_val */
1378 buffer_put_bignum2(&m, step2_val);
1379 /* monitor already knows all the ids */
1380 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1382 mm_request_send(pmonitor->m_recvfd,
1383 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1385 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1386 mm_request_receive_expect(pmonitor->m_recvfd,
1387 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1389 /* 'k' is sensitive and stays in the monitor */
1390 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1396 mm_jpake_check_confirm(const BIGNUM *k,
1397 const u_char *peer_id, u_int peer_id_len,
1398 const u_char *sess_id, u_int sess_id_len,
1399 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1404 debug3("%s entering", __func__);
1407 /* k is dummy in slave, ignored */
1408 /* monitor knows all the ids */
1409 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1410 mm_request_send(pmonitor->m_recvfd,
1411 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1413 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1414 mm_request_receive_expect(pmonitor->m_recvfd,
1415 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1417 success = buffer_get_int(&m);
1420 debug3("%s: success = %d", __func__, success);