2 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
3 * Copyright 2002 Markus Friedl <markus@openbsd.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28 RCSID("$OpenBSD: monitor_wrap.c,v 1.35 2003/11/17 11:06:07 markus Exp $");
30 #include <openssl/bn.h>
31 #include <openssl/dh.h>
33 #include "zlib.h" /* XXX Moved due to conflict on MacOS/X */
39 #include "auth-options.h"
46 #include "monitor_wrap.h"
49 #include "monitor_fdpass.h"
63 extern Newkeys *newkeys[];
64 extern z_stream incoming_stream;
65 extern z_stream outgoing_stream;
66 extern struct monitor *pmonitor;
67 extern Buffer input, output;
68 extern ServerOptions options;
74 * m_pid is only set in the privileged part, and
75 * points to the unprivileged child.
77 return (pmonitor && pmonitor->m_pid > 0);
81 mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
83 u_int mlen = buffer_len(m);
86 debug3("%s entering: type %d", __func__, type);
88 PUT_32BIT(buf, mlen + 1);
89 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
90 if (atomicio(vwrite, socket, buf, sizeof(buf)) != sizeof(buf))
91 fatal("%s: write", __func__);
92 if (atomicio(vwrite, socket, buffer_ptr(m), mlen) != mlen)
93 fatal("%s: write", __func__);
97 mm_request_receive(int socket, Buffer *m)
103 debug3("%s entering", __func__);
105 res = atomicio(read, socket, buf, sizeof(buf));
106 if (res != sizeof(buf)) {
109 fatal("%s: read: %ld", __func__, (long)res);
111 msg_len = GET_32BIT(buf);
112 if (msg_len > 256 * 1024)
113 fatal("%s: read: bad msg_len %d", __func__, msg_len);
115 buffer_append_space(m, msg_len);
116 res = atomicio(read, socket, buffer_ptr(m), msg_len);
118 fatal("%s: read: %ld != msg_len", __func__, (long)res);
122 mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
126 debug3("%s entering: type %d", __func__, type);
128 mm_request_receive(socket, m);
129 rtype = buffer_get_char(m);
131 fatal("%s: read: rtype %d != type %d", __func__,
136 mm_choose_dh(int min, int nbits, int max)
143 buffer_put_int(&m, min);
144 buffer_put_int(&m, nbits);
145 buffer_put_int(&m, max);
147 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
149 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
150 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
152 success = buffer_get_char(&m);
154 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
156 if ((p = BN_new()) == NULL)
157 fatal("%s: BN_new failed", __func__);
158 if ((g = BN_new()) == NULL)
159 fatal("%s: BN_new failed", __func__);
160 buffer_get_bignum2(&m, p);
161 buffer_get_bignum2(&m, g);
163 debug3("%s: remaining %d", __func__, buffer_len(&m));
166 return (dh_new_group(g, p));
170 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
172 Kex *kex = *pmonitor->m_pkex;
175 debug3("%s entering", __func__);
178 buffer_put_int(&m, kex->host_key_index(key));
179 buffer_put_string(&m, data, datalen);
181 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
183 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
184 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
185 *sigp = buffer_get_string(&m, lenp);
192 mm_getpwnamallow(const char *login)
198 debug3("%s entering", __func__);
201 buffer_put_cstring(&m, login);
203 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
205 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
206 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
208 if (buffer_get_char(&m) == 0) {
212 pw = buffer_get_string(&m, &pwlen);
213 if (pwlen != sizeof(struct passwd))
214 fatal("%s: struct passwd size mismatch", __func__);
215 pw->pw_name = buffer_get_string(&m, NULL);
216 pw->pw_passwd = buffer_get_string(&m, NULL);
217 pw->pw_gecos = buffer_get_string(&m, NULL);
218 #ifdef HAVE_PW_CLASS_IN_PASSWD
219 pw->pw_class = buffer_get_string(&m, NULL);
221 pw->pw_dir = buffer_get_string(&m, NULL);
222 pw->pw_shell = buffer_get_string(&m, NULL);
229 mm_auth2_read_banner(void)
234 debug3("%s entering", __func__);
237 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
240 mm_request_receive_expect(pmonitor->m_recvfd,
241 MONITOR_ANS_AUTH2_READ_BANNER, &m);
242 banner = buffer_get_string(&m, NULL);
245 /* treat empty banner as missing banner */
246 if (strlen(banner) == 0) {
253 /* Inform the privileged process about service and style */
256 mm_inform_authserv(char *service, char *style)
260 debug3("%s entering", __func__);
263 buffer_put_cstring(&m, service);
264 buffer_put_cstring(&m, style ? style : "");
266 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
271 /* Do the password authentication */
273 mm_auth_password(Authctxt *authctxt, char *password)
276 int authenticated = 0;
278 debug3("%s entering", __func__);
281 buffer_put_cstring(&m, password);
282 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
284 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
285 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
287 authenticated = buffer_get_int(&m);
291 debug3("%s: user %sauthenticated",
292 __func__, authenticated ? "" : "not ");
293 return (authenticated);
297 mm_user_key_allowed(struct passwd *pw, Key *key)
299 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
303 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
306 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
310 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
311 char *host, Key *key)
315 key->type = KEY_RSA; /* XXX hack for key_to_blob */
316 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
317 key->type = KEY_RSA1;
322 mm_send_debug(Buffer *m)
326 while (buffer_len(m)) {
327 msg = buffer_get_string(m, NULL);
328 debug3("%s: Sending debug: %s", __func__, msg);
329 packet_send_debug("%s", msg);
335 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
340 int allowed = 0, have_forced = 0;
342 debug3("%s entering", __func__);
344 /* Convert the key to a blob and the pass it over */
345 if (!key_to_blob(key, &blob, &len))
349 buffer_put_int(&m, type);
350 buffer_put_cstring(&m, user ? user : "");
351 buffer_put_cstring(&m, host ? host : "");
352 buffer_put_string(&m, blob, len);
355 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
357 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
358 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
360 allowed = buffer_get_int(&m);
362 /* fake forced command */
363 auth_clear_options();
364 have_forced = buffer_get_int(&m);
365 forced_command = have_forced ? xstrdup("true") : NULL;
367 /* Send potential debug messages */
376 * This key verify needs to send the key type along, because the
377 * privileged parent makes the decision if the key is allowed
378 * for authentication.
382 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
389 debug3("%s entering", __func__);
391 /* Convert the key to a blob and the pass it over */
392 if (!key_to_blob(key, &blob, &len))
396 buffer_put_string(&m, blob, len);
397 buffer_put_string(&m, sig, siglen);
398 buffer_put_string(&m, data, datalen);
401 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
403 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
404 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
406 verified = buffer_get_int(&m);
413 /* Export key state after authentication */
415 mm_newkeys_from_blob(u_char *blob, int blen)
419 Newkeys *newkey = NULL;
424 debug3("%s: %p(%d)", __func__, blob, blen);
426 dump_base64(stderr, blob, blen);
429 buffer_append(&b, blob, blen);
431 newkey = xmalloc(sizeof(*newkey));
434 comp = &newkey->comp;
437 enc->name = buffer_get_string(&b, NULL);
438 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
439 enc->enabled = buffer_get_int(&b);
440 enc->block_size = buffer_get_int(&b);
441 enc->key = buffer_get_string(&b, &enc->key_len);
442 enc->iv = buffer_get_string(&b, &len);
443 if (len != enc->block_size)
444 fatal("%s: bad ivlen: expected %u != %u", __func__,
445 enc->block_size, len);
447 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
448 fatal("%s: bad cipher name %s or pointer %p", __func__,
449 enc->name, enc->cipher);
452 mac->name = buffer_get_string(&b, NULL);
453 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
454 fatal("%s: can not init mac %s", __func__, mac->name);
455 mac->enabled = buffer_get_int(&b);
456 mac->key = buffer_get_string(&b, &len);
457 if (len > mac->key_len)
458 fatal("%s: bad mac key length: %u > %d", __func__, len,
463 comp->type = buffer_get_int(&b);
464 comp->enabled = buffer_get_int(&b);
465 comp->name = buffer_get_string(&b, NULL);
467 len = buffer_len(&b);
469 error("newkeys_from_blob: remaining bytes in blob %u", len);
475 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
482 Newkeys *newkey = newkeys[mode];
484 debug3("%s: converting %p", __func__, newkey);
486 if (newkey == NULL) {
487 error("%s: newkey == NULL", __func__);
492 comp = &newkey->comp;
496 buffer_put_cstring(&b, enc->name);
497 /* The cipher struct is constant and shared, you export pointer */
498 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
499 buffer_put_int(&b, enc->enabled);
500 buffer_put_int(&b, enc->block_size);
501 buffer_put_string(&b, enc->key, enc->key_len);
502 packet_get_keyiv(mode, enc->iv, enc->block_size);
503 buffer_put_string(&b, enc->iv, enc->block_size);
506 buffer_put_cstring(&b, mac->name);
507 buffer_put_int(&b, mac->enabled);
508 buffer_put_string(&b, mac->key, mac->key_len);
511 buffer_put_int(&b, comp->type);
512 buffer_put_int(&b, comp->enabled);
513 buffer_put_cstring(&b, comp->name);
515 len = buffer_len(&b);
519 *blobp = xmalloc(len);
520 memcpy(*blobp, buffer_ptr(&b), len);
522 memset(buffer_ptr(&b), 0, len);
528 mm_send_kex(Buffer *m, Kex *kex)
530 buffer_put_string(m, kex->session_id, kex->session_id_len);
531 buffer_put_int(m, kex->we_need);
532 buffer_put_int(m, kex->hostkey_type);
533 buffer_put_int(m, kex->kex_type);
534 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
535 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
536 buffer_put_int(m, kex->flags);
537 buffer_put_cstring(m, kex->client_version_string);
538 buffer_put_cstring(m, kex->server_version_string);
542 mm_send_keystate(struct monitor *pmonitor)
547 u_int32_t seqnr, packets;
557 buffer_put_int(&m, packet_get_protocol_flags());
559 buffer_put_int(&m, packet_get_ssh1_cipher());
561 debug3("%s: Sending ssh1 KEY+IV", __func__);
562 keylen = packet_get_encryption_key(NULL);
563 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
564 keylen = packet_get_encryption_key(key);
565 buffer_put_string(&m, key, keylen);
566 memset(key, 0, keylen);
569 ivlen = packet_get_keyiv_len(MODE_OUT);
570 packet_get_keyiv(MODE_OUT, iv, ivlen);
571 buffer_put_string(&m, iv, ivlen);
572 ivlen = packet_get_keyiv_len(MODE_OUT);
573 packet_get_keyiv(MODE_IN, iv, ivlen);
574 buffer_put_string(&m, iv, ivlen);
577 /* Kex for rekeying */
578 mm_send_kex(&m, *pmonitor->m_pkex);
581 debug3("%s: Sending new keys: %p %p",
582 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
585 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
586 fatal("%s: conversion of newkeys failed", __func__);
588 buffer_put_string(&m, blob, bloblen);
591 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
592 fatal("%s: conversion of newkeys failed", __func__);
594 buffer_put_string(&m, blob, bloblen);
597 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
598 buffer_put_int(&m, seqnr);
599 buffer_put_int64(&m, blocks);
600 buffer_put_int(&m, packets);
601 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
602 buffer_put_int(&m, seqnr);
603 buffer_put_int64(&m, blocks);
604 buffer_put_int(&m, packets);
606 debug3("%s: New keys have been sent", __func__);
608 /* More key context */
609 plen = packet_get_keycontext(MODE_OUT, NULL);
611 packet_get_keycontext(MODE_OUT, p);
612 buffer_put_string(&m, p, plen);
615 plen = packet_get_keycontext(MODE_IN, NULL);
617 packet_get_keycontext(MODE_IN, p);
618 buffer_put_string(&m, p, plen);
621 /* Compression state */
622 debug3("%s: Sending compression state", __func__);
623 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
624 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
626 /* Network I/O buffers */
627 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
628 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
630 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
631 debug3("%s: Finished sending state", __func__);
637 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
644 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
646 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
647 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
649 success = buffer_get_int(&m);
651 debug3("%s: pty alloc failed", __func__);
655 p = buffer_get_string(&m, NULL);
658 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
661 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
662 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
669 mm_session_pty_cleanup2(Session *s)
676 buffer_put_cstring(&m, s->tty);
677 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
680 /* closed dup'ed master */
681 if (close(s->ptymaster) < 0)
682 error("close(s->ptymaster): %s", strerror(errno));
684 /* unlink pty from session */
690 mm_start_pam(Authctxt *authctxt)
694 debug3("%s entering", __func__);
695 if (!options.use_pam)
696 fatal("UsePAM=no, but ended up in %s anyway", __func__);
699 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
705 mm_do_pam_account(void)
710 debug3("%s entering", __func__);
711 if (!options.use_pam)
712 fatal("UsePAM=no, but ended up in %s anyway", __func__);
715 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
717 mm_request_receive_expect(pmonitor->m_recvfd,
718 MONITOR_ANS_PAM_ACCOUNT, &m);
719 ret = buffer_get_int(&m);
723 debug3("%s returning %d", __func__, ret);
729 mm_sshpam_init_ctx(Authctxt *authctxt)
734 debug3("%s", __func__);
736 buffer_put_cstring(&m, authctxt->user);
737 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
738 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
739 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
740 success = buffer_get_int(&m);
742 debug3("%s: pam_init_ctx failed", __func__);
751 mm_sshpam_query(void *ctx, char **name, char **info,
752 u_int *num, char ***prompts, u_int **echo_on)
757 debug3("%s", __func__);
759 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
760 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
761 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
762 ret = buffer_get_int(&m);
763 debug3("%s: pam_query returned %d", __func__, ret);
764 *name = buffer_get_string(&m, NULL);
765 *info = buffer_get_string(&m, NULL);
766 *num = buffer_get_int(&m);
767 *prompts = xmalloc((*num + 1) * sizeof(char *));
768 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
769 for (i = 0; i < *num; ++i) {
770 (*prompts)[i] = buffer_get_string(&m, NULL);
771 (*echo_on)[i] = buffer_get_int(&m);
778 mm_sshpam_respond(void *ctx, u_int num, char **resp)
783 debug3("%s", __func__);
785 buffer_put_int(&m, num);
786 for (i = 0; i < num; ++i)
787 buffer_put_cstring(&m, resp[i]);
788 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
789 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
790 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
791 ret = buffer_get_int(&m);
792 debug3("%s: pam_respond returned %d", __func__, ret);
798 mm_sshpam_free_ctx(void *ctxtp)
802 debug3("%s", __func__);
804 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
805 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
806 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
811 /* Request process termination */
819 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
824 mm_ssh1_session_key(BIGNUM *num)
830 buffer_put_bignum2(&m, num);
831 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
833 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
835 rsafail = buffer_get_int(&m);
836 buffer_get_bignum2(&m, num);
844 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
845 char ***prompts, u_int **echo_on)
848 *infotxt = xstrdup("");
850 *prompts = xmalloc(*numprompts * sizeof(char *));
851 *echo_on = xmalloc(*numprompts * sizeof(u_int));
856 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
857 u_int *numprompts, char ***prompts, u_int **echo_on)
863 debug3("%s: entering", __func__);
866 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
868 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
870 success = buffer_get_int(&m);
872 debug3("%s: no challenge", __func__);
877 /* Get the challenge, and format the response */
878 challenge = buffer_get_string(&m, NULL);
881 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
882 (*prompts)[0] = challenge;
884 debug3("%s: received challenge: %s", __func__, challenge);
890 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
895 debug3("%s: entering", __func__);
896 if (numresponses != 1)
900 buffer_put_cstring(&m, responses[0]);
901 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
903 mm_request_receive_expect(pmonitor->m_recvfd,
904 MONITOR_ANS_BSDAUTHRESPOND, &m);
906 authok = buffer_get_int(&m);
909 return ((authok == 0) ? -1 : 0);
913 mm_skey_query(void *ctx, char **name, char **infotxt,
914 u_int *numprompts, char ***prompts, u_int **echo_on)
921 debug3("%s: entering", __func__);
924 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
926 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
928 success = buffer_get_int(&m);
930 debug3("%s: no challenge", __func__);
935 /* Get the challenge, and format the response */
936 challenge = buffer_get_string(&m, NULL);
939 debug3("%s: received challenge: %s", __func__, challenge);
941 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
943 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
945 strlcpy(p, challenge, len);
946 strlcat(p, SKEY_PROMPT, len);
954 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
959 debug3("%s: entering", __func__);
960 if (numresponses != 1)
964 buffer_put_cstring(&m, responses[0]);
965 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
967 mm_request_receive_expect(pmonitor->m_recvfd,
968 MONITOR_ANS_SKEYRESPOND, &m);
970 authok = buffer_get_int(&m);
973 return ((authok == 0) ? -1 : 0);
977 mm_ssh1_session_id(u_char session_id[16])
982 debug3("%s entering", __func__);
985 for (i = 0; i < 16; i++)
986 buffer_put_char(&m, session_id[i]);
988 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
993 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
999 int allowed = 0, have_forced = 0;
1001 debug3("%s entering", __func__);
1004 buffer_put_bignum2(&m, client_n);
1006 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1007 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1009 allowed = buffer_get_int(&m);
1011 /* fake forced command */
1012 auth_clear_options();
1013 have_forced = buffer_get_int(&m);
1014 forced_command = have_forced ? xstrdup("true") : NULL;
1016 if (allowed && rkey != NULL) {
1017 blob = buffer_get_string(&m, &blen);
1018 if ((key = key_from_blob(blob, blen)) == NULL)
1019 fatal("%s: key_from_blob failed", __func__);
1030 mm_auth_rsa_generate_challenge(Key *key)
1037 debug3("%s entering", __func__);
1039 if ((challenge = BN_new()) == NULL)
1040 fatal("%s: BN_new failed", __func__);
1042 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1043 if (key_to_blob(key, &blob, &blen) == 0)
1044 fatal("%s: key_to_blob failed", __func__);
1045 key->type = KEY_RSA1;
1048 buffer_put_string(&m, blob, blen);
1051 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1052 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1054 buffer_get_bignum2(&m, challenge);
1061 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1068 debug3("%s entering", __func__);
1070 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1071 if (key_to_blob(key, &blob, &blen) == 0)
1072 fatal("%s: key_to_blob failed", __func__);
1073 key->type = KEY_RSA1;
1076 buffer_put_string(&m, blob, blen);
1077 buffer_put_string(&m, response, 16);
1080 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1081 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1083 success = buffer_get_int(&m);
1091 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid)
1096 /* Client doesn't get to see the context */
1100 buffer_put_string(&m, oid->elements, oid->length);
1102 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1103 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1105 major = buffer_get_int(&m);
1112 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1113 gss_buffer_desc *out, OM_uint32 *flags)
1120 buffer_put_string(&m, in->value, in->length);
1122 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1123 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1125 major = buffer_get_int(&m);
1126 out->value = buffer_get_string(&m, &len);
1129 *flags = buffer_get_int(&m);
1137 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1143 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1144 buffer_put_string(&m, gssmic->value, gssmic->length);
1146 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1147 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1150 major = buffer_get_int(&m);
1156 mm_ssh_gssapi_userok(char *user)
1159 int authenticated = 0;
1163 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1164 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1167 authenticated = buffer_get_int(&m);
1170 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1171 return (authenticated);