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 1.39 2004/07/17 05:31:41 dtucker Exp $");
30 #include <openssl/bn.h>
31 #include <openssl/dh.h>
37 #include "auth-options.h"
43 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
46 #define TARGET_OS_MAC 1
51 #include "monitor_wrap.h"
54 #include "monitor_fdpass.h"
68 extern Newkeys *newkeys[];
69 extern z_stream incoming_stream;
70 extern z_stream outgoing_stream;
71 extern struct monitor *pmonitor;
72 extern Buffer input, output;
73 extern Buffer loginmsg;
74 extern ServerOptions options;
80 * m_pid is only set in the privileged part, and
81 * points to the unprivileged child.
83 return (pmonitor && pmonitor->m_pid > 0);
87 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
89 u_int mlen = buffer_len(m);
92 debug3("%s entering: type %d", __func__, type);
94 PUT_32BIT(buf, mlen + 1);
95 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
96 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
97 fatal("%s: write", __func__);
98 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
99 fatal("%s: write", __func__);
103 mm_request_receive(int sock, Buffer *m)
109 debug3("%s entering", __func__);
111 res = atomicio(read, sock, buf, sizeof(buf));
112 if (res != sizeof(buf)) {
115 fatal("%s: read: %ld", __func__, (long)res);
117 msg_len = GET_32BIT(buf);
118 if (msg_len > 256 * 1024)
119 fatal("%s: read: bad msg_len %d", __func__, msg_len);
121 buffer_append_space(m, msg_len);
122 res = atomicio(read, sock, buffer_ptr(m), msg_len);
124 fatal("%s: read: %ld != msg_len", __func__, (long)res);
128 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
132 debug3("%s entering: type %d", __func__, type);
134 mm_request_receive(sock, m);
135 rtype = buffer_get_char(m);
137 fatal("%s: read: rtype %d != type %d", __func__,
142 mm_choose_dh(int min, int nbits, int max)
149 buffer_put_int(&m, min);
150 buffer_put_int(&m, nbits);
151 buffer_put_int(&m, max);
153 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
155 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
156 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
158 success = buffer_get_char(&m);
160 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
162 if ((p = BN_new()) == NULL)
163 fatal("%s: BN_new failed", __func__);
164 if ((g = BN_new()) == NULL)
165 fatal("%s: BN_new failed", __func__);
166 buffer_get_bignum2(&m, p);
167 buffer_get_bignum2(&m, g);
169 debug3("%s: remaining %d", __func__, buffer_len(&m));
172 return (dh_new_group(g, p));
176 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
178 Kex *kex = *pmonitor->m_pkex;
181 debug3("%s entering", __func__);
184 buffer_put_int(&m, kex->host_key_index(key));
185 buffer_put_string(&m, data, datalen);
187 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
189 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
190 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
191 *sigp = buffer_get_string(&m, lenp);
198 mm_getpwnamallow(const char *username)
204 debug3("%s entering", __func__);
207 buffer_put_cstring(&m, username);
209 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
211 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
212 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
214 if (buffer_get_char(&m) == 0) {
218 pw = buffer_get_string(&m, &pwlen);
219 if (pwlen != sizeof(struct passwd))
220 fatal("%s: struct passwd size mismatch", __func__);
221 pw->pw_name = buffer_get_string(&m, NULL);
222 pw->pw_passwd = buffer_get_string(&m, NULL);
223 pw->pw_gecos = buffer_get_string(&m, NULL);
224 #ifdef HAVE_PW_CLASS_IN_PASSWD
225 pw->pw_class = buffer_get_string(&m, NULL);
227 pw->pw_dir = buffer_get_string(&m, NULL);
228 pw->pw_shell = buffer_get_string(&m, NULL);
235 mm_auth2_read_banner(void)
240 debug3("%s entering", __func__);
243 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
246 mm_request_receive_expect(pmonitor->m_recvfd,
247 MONITOR_ANS_AUTH2_READ_BANNER, &m);
248 banner = buffer_get_string(&m, NULL);
251 /* treat empty banner as missing banner */
252 if (strlen(banner) == 0) {
259 /* Inform the privileged process about service and style */
262 mm_inform_authserv(char *service, char *style)
266 debug3("%s entering", __func__);
269 buffer_put_cstring(&m, service);
270 buffer_put_cstring(&m, style ? style : "");
272 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
277 /* Do the password authentication */
279 mm_auth_password(Authctxt *authctxt, char *password)
282 int authenticated = 0;
284 debug3("%s entering", __func__);
287 buffer_put_cstring(&m, password);
288 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
290 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
291 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
293 authenticated = buffer_get_int(&m);
297 debug3("%s: user %sauthenticated",
298 __func__, authenticated ? "" : "not ");
299 return (authenticated);
303 mm_user_key_allowed(struct passwd *pw, Key *key)
305 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
309 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
312 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
316 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
317 char *host, Key *key)
321 key->type = KEY_RSA; /* XXX hack for key_to_blob */
322 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
323 key->type = KEY_RSA1;
328 mm_send_debug(Buffer *m)
332 while (buffer_len(m)) {
333 msg = buffer_get_string(m, NULL);
334 debug3("%s: Sending debug: %s", __func__, msg);
335 packet_send_debug("%s", msg);
341 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
346 int allowed = 0, have_forced = 0;
348 debug3("%s entering", __func__);
350 /* Convert the key to a blob and the pass it over */
351 if (!key_to_blob(key, &blob, &len))
355 buffer_put_int(&m, type);
356 buffer_put_cstring(&m, user ? user : "");
357 buffer_put_cstring(&m, host ? host : "");
358 buffer_put_string(&m, blob, len);
361 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
363 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
364 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
366 allowed = buffer_get_int(&m);
368 /* fake forced command */
369 auth_clear_options();
370 have_forced = buffer_get_int(&m);
371 forced_command = have_forced ? xstrdup("true") : NULL;
373 /* Send potential debug messages */
382 * This key verify needs to send the key type along, because the
383 * privileged parent makes the decision if the key is allowed
384 * for authentication.
388 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
395 debug3("%s entering", __func__);
397 /* Convert the key to a blob and the pass it over */
398 if (!key_to_blob(key, &blob, &len))
402 buffer_put_string(&m, blob, len);
403 buffer_put_string(&m, sig, siglen);
404 buffer_put_string(&m, data, datalen);
407 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
409 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
410 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
412 verified = buffer_get_int(&m);
419 /* Export key state after authentication */
421 mm_newkeys_from_blob(u_char *blob, int blen)
425 Newkeys *newkey = NULL;
430 debug3("%s: %p(%d)", __func__, blob, blen);
432 dump_base64(stderr, blob, blen);
435 buffer_append(&b, blob, blen);
437 newkey = xmalloc(sizeof(*newkey));
440 comp = &newkey->comp;
443 enc->name = buffer_get_string(&b, NULL);
444 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
445 enc->enabled = buffer_get_int(&b);
446 enc->block_size = buffer_get_int(&b);
447 enc->key = buffer_get_string(&b, &enc->key_len);
448 enc->iv = buffer_get_string(&b, &len);
449 if (len != enc->block_size)
450 fatal("%s: bad ivlen: expected %u != %u", __func__,
451 enc->block_size, len);
453 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
454 fatal("%s: bad cipher name %s or pointer %p", __func__,
455 enc->name, enc->cipher);
458 mac->name = buffer_get_string(&b, NULL);
459 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
460 fatal("%s: can not init mac %s", __func__, mac->name);
461 mac->enabled = buffer_get_int(&b);
462 mac->key = buffer_get_string(&b, &len);
463 if (len > mac->key_len)
464 fatal("%s: bad mac key length: %u > %d", __func__, len,
469 comp->type = buffer_get_int(&b);
470 comp->enabled = buffer_get_int(&b);
471 comp->name = buffer_get_string(&b, NULL);
473 len = buffer_len(&b);
475 error("newkeys_from_blob: remaining bytes in blob %u", len);
481 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
488 Newkeys *newkey = newkeys[mode];
490 debug3("%s: converting %p", __func__, newkey);
492 if (newkey == NULL) {
493 error("%s: newkey == NULL", __func__);
498 comp = &newkey->comp;
502 buffer_put_cstring(&b, enc->name);
503 /* The cipher struct is constant and shared, you export pointer */
504 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
505 buffer_put_int(&b, enc->enabled);
506 buffer_put_int(&b, enc->block_size);
507 buffer_put_string(&b, enc->key, enc->key_len);
508 packet_get_keyiv(mode, enc->iv, enc->block_size);
509 buffer_put_string(&b, enc->iv, enc->block_size);
512 buffer_put_cstring(&b, mac->name);
513 buffer_put_int(&b, mac->enabled);
514 buffer_put_string(&b, mac->key, mac->key_len);
517 buffer_put_int(&b, comp->type);
518 buffer_put_int(&b, comp->enabled);
519 buffer_put_cstring(&b, comp->name);
521 len = buffer_len(&b);
525 *blobp = xmalloc(len);
526 memcpy(*blobp, buffer_ptr(&b), len);
528 memset(buffer_ptr(&b), 0, len);
534 mm_send_kex(Buffer *m, Kex *kex)
536 buffer_put_string(m, kex->session_id, kex->session_id_len);
537 buffer_put_int(m, kex->we_need);
538 buffer_put_int(m, kex->hostkey_type);
539 buffer_put_int(m, kex->kex_type);
540 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
541 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
542 buffer_put_int(m, kex->flags);
543 buffer_put_cstring(m, kex->client_version_string);
544 buffer_put_cstring(m, kex->server_version_string);
548 mm_send_keystate(struct monitor *monitor)
553 u_int32_t seqnr, packets;
563 buffer_put_int(&m, packet_get_protocol_flags());
565 buffer_put_int(&m, packet_get_ssh1_cipher());
567 debug3("%s: Sending ssh1 KEY+IV", __func__);
568 keylen = packet_get_encryption_key(NULL);
569 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
570 keylen = packet_get_encryption_key(key);
571 buffer_put_string(&m, key, keylen);
572 memset(key, 0, keylen);
575 ivlen = packet_get_keyiv_len(MODE_OUT);
576 packet_get_keyiv(MODE_OUT, iv, ivlen);
577 buffer_put_string(&m, iv, ivlen);
578 ivlen = packet_get_keyiv_len(MODE_OUT);
579 packet_get_keyiv(MODE_IN, iv, ivlen);
580 buffer_put_string(&m, iv, ivlen);
583 /* Kex for rekeying */
584 mm_send_kex(&m, *monitor->m_pkex);
587 debug3("%s: Sending new keys: %p %p",
588 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
591 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
592 fatal("%s: conversion of newkeys failed", __func__);
594 buffer_put_string(&m, blob, bloblen);
597 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
598 fatal("%s: conversion of newkeys failed", __func__);
600 buffer_put_string(&m, blob, bloblen);
603 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
604 buffer_put_int(&m, seqnr);
605 buffer_put_int64(&m, blocks);
606 buffer_put_int(&m, packets);
607 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
608 buffer_put_int(&m, seqnr);
609 buffer_put_int64(&m, blocks);
610 buffer_put_int(&m, packets);
612 debug3("%s: New keys have been sent", __func__);
614 /* More key context */
615 plen = packet_get_keycontext(MODE_OUT, NULL);
617 packet_get_keycontext(MODE_OUT, p);
618 buffer_put_string(&m, p, plen);
621 plen = packet_get_keycontext(MODE_IN, NULL);
623 packet_get_keycontext(MODE_IN, p);
624 buffer_put_string(&m, p, plen);
627 /* Compression state */
628 debug3("%s: Sending compression state", __func__);
629 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
630 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
632 /* Network I/O buffers */
633 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
634 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
636 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
637 debug3("%s: Finished sending state", __func__);
643 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
650 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
652 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
653 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
655 success = buffer_get_int(&m);
657 debug3("%s: pty alloc failed", __func__);
661 p = buffer_get_string(&m, NULL);
662 msg = buffer_get_string(&m, NULL);
665 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
668 buffer_append(&loginmsg, msg, strlen(msg));
671 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
672 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
679 mm_session_pty_cleanup2(Session *s)
686 buffer_put_cstring(&m, s->tty);
687 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
690 /* closed dup'ed master */
691 if (close(s->ptymaster) < 0)
692 error("close(s->ptymaster): %s", strerror(errno));
694 /* unlink pty from session */
700 mm_start_pam(Authctxt *authctxt)
704 debug3("%s entering", __func__);
705 if (!options.use_pam)
706 fatal("UsePAM=no, but ended up in %s anyway", __func__);
709 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
715 mm_do_pam_account(void)
720 debug3("%s entering", __func__);
721 if (!options.use_pam)
722 fatal("UsePAM=no, but ended up in %s anyway", __func__);
725 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
727 mm_request_receive_expect(pmonitor->m_recvfd,
728 MONITOR_ANS_PAM_ACCOUNT, &m);
729 ret = buffer_get_int(&m);
733 debug3("%s returning %d", __func__, ret);
739 mm_sshpam_init_ctx(Authctxt *authctxt)
744 debug3("%s", __func__);
746 buffer_put_cstring(&m, authctxt->user);
747 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
748 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
749 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
750 success = buffer_get_int(&m);
752 debug3("%s: pam_init_ctx failed", __func__);
761 mm_sshpam_query(void *ctx, char **name, char **info,
762 u_int *num, char ***prompts, u_int **echo_on)
767 debug3("%s", __func__);
769 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
770 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
771 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
772 ret = buffer_get_int(&m);
773 debug3("%s: pam_query returned %d", __func__, ret);
774 *name = buffer_get_string(&m, NULL);
775 *info = buffer_get_string(&m, NULL);
776 *num = buffer_get_int(&m);
777 *prompts = xmalloc((*num + 1) * sizeof(char *));
778 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
779 for (i = 0; i < *num; ++i) {
780 (*prompts)[i] = buffer_get_string(&m, NULL);
781 (*echo_on)[i] = buffer_get_int(&m);
788 mm_sshpam_respond(void *ctx, u_int num, char **resp)
793 debug3("%s", __func__);
795 buffer_put_int(&m, num);
796 for (i = 0; i < num; ++i)
797 buffer_put_cstring(&m, resp[i]);
798 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
799 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
800 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
801 ret = buffer_get_int(&m);
802 debug3("%s: pam_respond returned %d", __func__, ret);
808 mm_sshpam_free_ctx(void *ctxtp)
812 debug3("%s", __func__);
814 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
815 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
816 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
821 /* Request process termination */
829 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
834 mm_ssh1_session_key(BIGNUM *num)
840 buffer_put_bignum2(&m, num);
841 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
843 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
845 rsafail = buffer_get_int(&m);
846 buffer_get_bignum2(&m, num);
854 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
855 char ***prompts, u_int **echo_on)
858 *infotxt = xstrdup("");
860 *prompts = xmalloc(*numprompts * sizeof(char *));
861 *echo_on = xmalloc(*numprompts * sizeof(u_int));
866 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
867 u_int *numprompts, char ***prompts, u_int **echo_on)
873 debug3("%s: entering", __func__);
876 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
878 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
880 success = buffer_get_int(&m);
882 debug3("%s: no challenge", __func__);
887 /* Get the challenge, and format the response */
888 challenge = buffer_get_string(&m, NULL);
891 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
892 (*prompts)[0] = challenge;
894 debug3("%s: received challenge: %s", __func__, challenge);
900 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
905 debug3("%s: entering", __func__);
906 if (numresponses != 1)
910 buffer_put_cstring(&m, responses[0]);
911 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
913 mm_request_receive_expect(pmonitor->m_recvfd,
914 MONITOR_ANS_BSDAUTHRESPOND, &m);
916 authok = buffer_get_int(&m);
919 return ((authok == 0) ? -1 : 0);
924 mm_skey_query(void *ctx, char **name, char **infotxt,
925 u_int *numprompts, char ***prompts, u_int **echo_on)
932 debug3("%s: entering", __func__);
935 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
937 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
939 success = buffer_get_int(&m);
941 debug3("%s: no challenge", __func__);
946 /* Get the challenge, and format the response */
947 challenge = buffer_get_string(&m, NULL);
950 debug3("%s: received challenge: %s", __func__, challenge);
952 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
954 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
956 strlcpy(p, challenge, len);
957 strlcat(p, SKEY_PROMPT, len);
965 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
970 debug3("%s: entering", __func__);
971 if (numresponses != 1)
975 buffer_put_cstring(&m, responses[0]);
976 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
978 mm_request_receive_expect(pmonitor->m_recvfd,
979 MONITOR_ANS_SKEYRESPOND, &m);
981 authok = buffer_get_int(&m);
984 return ((authok == 0) ? -1 : 0);
989 mm_ssh1_session_id(u_char session_id[16])
994 debug3("%s entering", __func__);
997 for (i = 0; i < 16; i++)
998 buffer_put_char(&m, session_id[i]);
1000 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1005 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1011 int allowed = 0, have_forced = 0;
1013 debug3("%s entering", __func__);
1016 buffer_put_bignum2(&m, client_n);
1018 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1019 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1021 allowed = buffer_get_int(&m);
1023 /* fake forced command */
1024 auth_clear_options();
1025 have_forced = buffer_get_int(&m);
1026 forced_command = have_forced ? xstrdup("true") : NULL;
1028 if (allowed && rkey != NULL) {
1029 blob = buffer_get_string(&m, &blen);
1030 if ((key = key_from_blob(blob, blen)) == NULL)
1031 fatal("%s: key_from_blob failed", __func__);
1042 mm_auth_rsa_generate_challenge(Key *key)
1049 debug3("%s entering", __func__);
1051 if ((challenge = BN_new()) == NULL)
1052 fatal("%s: BN_new failed", __func__);
1054 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1055 if (key_to_blob(key, &blob, &blen) == 0)
1056 fatal("%s: key_to_blob failed", __func__);
1057 key->type = KEY_RSA1;
1060 buffer_put_string(&m, blob, blen);
1063 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1064 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1066 buffer_get_bignum2(&m, challenge);
1073 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1080 debug3("%s entering", __func__);
1082 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1083 if (key_to_blob(key, &blob, &blen) == 0)
1084 fatal("%s: key_to_blob failed", __func__);
1085 key->type = KEY_RSA1;
1088 buffer_put_string(&m, blob, blen);
1089 buffer_put_string(&m, response, 16);
1092 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1093 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1095 success = buffer_get_int(&m);
1103 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1108 /* Client doesn't get to see the context */
1112 buffer_put_string(&m, goid->elements, goid->length);
1114 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1115 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1117 major = buffer_get_int(&m);
1124 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1125 gss_buffer_desc *out, OM_uint32 *flags)
1132 buffer_put_string(&m, in->value, in->length);
1134 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1135 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1137 major = buffer_get_int(&m);
1138 out->value = buffer_get_string(&m, &len);
1141 *flags = buffer_get_int(&m);
1149 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1155 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1156 buffer_put_string(&m, gssmic->value, gssmic->length);
1158 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1159 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1162 major = buffer_get_int(&m);
1168 mm_ssh_gssapi_userok(char *user)
1171 int authenticated = 0;
1175 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1176 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1179 authenticated = buffer_get_int(&m);
1182 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1183 return (authenticated);