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 1.33 2003/10/11 11:36:23 markus Exp $");
30 #include <openssl/bn.h>
31 #include <openssl/dh.h>
37 #include "auth-options.h"
45 #include "monitor_wrap.h"
48 #include "monitor_fdpass.h"
62 extern Newkeys *newkeys[];
63 extern z_stream incoming_stream;
64 extern z_stream outgoing_stream;
65 extern struct monitor *pmonitor;
66 extern Buffer input, output;
67 extern ServerOptions options;
73 * m_pid is only set in the privileged part, and
74 * points to the unprivileged child.
76 return (pmonitor->m_pid > 0);
80 mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
82 u_int mlen = buffer_len(m);
85 debug3("%s entering: type %d", __func__, type);
87 PUT_32BIT(buf, mlen + 1);
88 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
89 if (atomicio(vwrite, socket, buf, sizeof(buf)) != sizeof(buf))
90 fatal("%s: write", __func__);
91 if (atomicio(vwrite, socket, buffer_ptr(m), mlen) != mlen)
92 fatal("%s: write", __func__);
96 mm_request_receive(int socket, Buffer *m)
102 debug3("%s entering", __func__);
104 res = atomicio(read, socket, buf, sizeof(buf));
105 if (res != sizeof(buf)) {
108 fatal("%s: read: %ld", __func__, (long)res);
110 msg_len = GET_32BIT(buf);
111 if (msg_len > 256 * 1024)
112 fatal("%s: read: bad msg_len %d", __func__, msg_len);
114 buffer_append_space(m, msg_len);
115 res = atomicio(read, socket, buffer_ptr(m), msg_len);
117 fatal("%s: read: %ld != msg_len", __func__, (long)res);
121 mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
125 debug3("%s entering: type %d", __func__, type);
127 mm_request_receive(socket, m);
128 rtype = buffer_get_char(m);
130 fatal("%s: read: rtype %d != type %d", __func__,
135 mm_choose_dh(int min, int nbits, int max)
142 buffer_put_int(&m, min);
143 buffer_put_int(&m, nbits);
144 buffer_put_int(&m, max);
146 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
148 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
149 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
151 success = buffer_get_char(&m);
153 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
155 if ((p = BN_new()) == NULL)
156 fatal("%s: BN_new failed", __func__);
157 if ((g = BN_new()) == NULL)
158 fatal("%s: BN_new failed", __func__);
159 buffer_get_bignum2(&m, p);
160 buffer_get_bignum2(&m, g);
162 debug3("%s: remaining %d", __func__, buffer_len(&m));
165 return (dh_new_group(g, p));
169 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
171 Kex *kex = *pmonitor->m_pkex;
174 debug3("%s entering", __func__);
177 buffer_put_int(&m, kex->host_key_index(key));
178 buffer_put_string(&m, data, datalen);
180 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
182 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
183 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
184 *sigp = buffer_get_string(&m, lenp);
191 mm_getpwnamallow(const char *login)
197 debug3("%s entering", __func__);
200 buffer_put_cstring(&m, login);
202 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
204 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
205 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
207 if (buffer_get_char(&m) == 0) {
211 pw = buffer_get_string(&m, &pwlen);
212 if (pwlen != sizeof(struct passwd))
213 fatal("%s: struct passwd size mismatch", __func__);
214 pw->pw_name = buffer_get_string(&m, NULL);
215 pw->pw_passwd = buffer_get_string(&m, NULL);
216 pw->pw_gecos = buffer_get_string(&m, NULL);
217 #ifdef HAVE_PW_CLASS_IN_PASSWD
218 pw->pw_class = buffer_get_string(&m, NULL);
220 pw->pw_dir = buffer_get_string(&m, NULL);
221 pw->pw_shell = buffer_get_string(&m, NULL);
228 mm_auth2_read_banner(void)
233 debug3("%s entering", __func__);
236 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
239 mm_request_receive_expect(pmonitor->m_recvfd,
240 MONITOR_ANS_AUTH2_READ_BANNER, &m);
241 banner = buffer_get_string(&m, NULL);
244 /* treat empty banner as missing banner */
245 if (strlen(banner) == 0) {
252 /* Inform the privileged process about service and style */
255 mm_inform_authserv(char *service, char *style)
259 debug3("%s entering", __func__);
262 buffer_put_cstring(&m, service);
263 buffer_put_cstring(&m, style ? style : "");
265 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
270 /* Do the password authentication */
272 mm_auth_password(Authctxt *authctxt, char *password)
275 int authenticated = 0;
277 debug3("%s entering", __func__);
280 buffer_put_cstring(&m, password);
281 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
283 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
284 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
286 authenticated = buffer_get_int(&m);
290 debug3("%s: user %sauthenticated",
291 __func__, authenticated ? "" : "not ");
292 return (authenticated);
296 mm_user_key_allowed(struct passwd *pw, Key *key)
298 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
302 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
305 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
309 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
310 char *host, Key *key)
314 key->type = KEY_RSA; /* XXX hack for key_to_blob */
315 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
316 key->type = KEY_RSA1;
321 mm_send_debug(Buffer *m)
325 while (buffer_len(m)) {
326 msg = buffer_get_string(m, NULL);
327 debug3("%s: Sending debug: %s", __func__, msg);
328 packet_send_debug("%s", msg);
334 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
339 int allowed = 0, have_forced = 0;
341 debug3("%s entering", __func__);
343 /* Convert the key to a blob and the pass it over */
344 if (!key_to_blob(key, &blob, &len))
348 buffer_put_int(&m, type);
349 buffer_put_cstring(&m, user ? user : "");
350 buffer_put_cstring(&m, host ? host : "");
351 buffer_put_string(&m, blob, len);
354 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
356 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
357 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
359 allowed = buffer_get_int(&m);
361 /* fake forced command */
362 auth_clear_options();
363 have_forced = buffer_get_int(&m);
364 forced_command = have_forced ? xstrdup("true") : NULL;
366 /* Send potential debug messages */
375 * This key verify needs to send the key type along, because the
376 * privileged parent makes the decision if the key is allowed
377 * for authentication.
381 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
388 debug3("%s entering", __func__);
390 /* Convert the key to a blob and the pass it over */
391 if (!key_to_blob(key, &blob, &len))
395 buffer_put_string(&m, blob, len);
396 buffer_put_string(&m, sig, siglen);
397 buffer_put_string(&m, data, datalen);
400 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
402 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
403 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
405 verified = buffer_get_int(&m);
412 /* Export key state after authentication */
414 mm_newkeys_from_blob(u_char *blob, int blen)
418 Newkeys *newkey = NULL;
423 debug3("%s: %p(%d)", __func__, blob, blen);
425 dump_base64(stderr, blob, blen);
428 buffer_append(&b, blob, blen);
430 newkey = xmalloc(sizeof(*newkey));
433 comp = &newkey->comp;
436 enc->name = buffer_get_string(&b, NULL);
437 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
438 enc->enabled = buffer_get_int(&b);
439 enc->block_size = buffer_get_int(&b);
440 enc->key = buffer_get_string(&b, &enc->key_len);
441 enc->iv = buffer_get_string(&b, &len);
442 if (len != enc->block_size)
443 fatal("%s: bad ivlen: expected %u != %u", __func__,
444 enc->block_size, len);
446 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
447 fatal("%s: bad cipher name %s or pointer %p", __func__,
448 enc->name, enc->cipher);
451 mac->name = buffer_get_string(&b, NULL);
452 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
453 fatal("%s: can not init mac %s", __func__, mac->name);
454 mac->enabled = buffer_get_int(&b);
455 mac->key = buffer_get_string(&b, &len);
456 if (len > mac->key_len)
457 fatal("%s: bad mac key length: %u > %d", __func__, len,
462 comp->type = buffer_get_int(&b);
463 comp->enabled = buffer_get_int(&b);
464 comp->name = buffer_get_string(&b, NULL);
466 len = buffer_len(&b);
468 error("newkeys_from_blob: remaining bytes in blob %u", len);
474 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
481 Newkeys *newkey = newkeys[mode];
483 debug3("%s: converting %p", __func__, newkey);
485 if (newkey == NULL) {
486 error("%s: newkey == NULL", __func__);
491 comp = &newkey->comp;
495 buffer_put_cstring(&b, enc->name);
496 /* The cipher struct is constant and shared, you export pointer */
497 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
498 buffer_put_int(&b, enc->enabled);
499 buffer_put_int(&b, enc->block_size);
500 buffer_put_string(&b, enc->key, enc->key_len);
501 packet_get_keyiv(mode, enc->iv, enc->block_size);
502 buffer_put_string(&b, enc->iv, enc->block_size);
505 buffer_put_cstring(&b, mac->name);
506 buffer_put_int(&b, mac->enabled);
507 buffer_put_string(&b, mac->key, mac->key_len);
510 buffer_put_int(&b, comp->type);
511 buffer_put_int(&b, comp->enabled);
512 buffer_put_cstring(&b, comp->name);
514 len = buffer_len(&b);
518 *blobp = xmalloc(len);
519 memcpy(*blobp, buffer_ptr(&b), len);
521 memset(buffer_ptr(&b), 0, len);
527 mm_send_kex(Buffer *m, Kex *kex)
529 buffer_put_string(m, kex->session_id, kex->session_id_len);
530 buffer_put_int(m, kex->we_need);
531 buffer_put_int(m, kex->hostkey_type);
532 buffer_put_int(m, kex->kex_type);
533 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
534 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
535 buffer_put_int(m, kex->flags);
536 buffer_put_cstring(m, kex->client_version_string);
537 buffer_put_cstring(m, kex->server_version_string);
541 mm_send_keystate(struct monitor *pmonitor)
546 u_int32_t seqnr, packets;
556 buffer_put_int(&m, packet_get_protocol_flags());
558 buffer_put_int(&m, packet_get_ssh1_cipher());
560 debug3("%s: Sending ssh1 KEY+IV", __func__);
561 keylen = packet_get_encryption_key(NULL);
562 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
563 keylen = packet_get_encryption_key(key);
564 buffer_put_string(&m, key, keylen);
565 memset(key, 0, keylen);
568 ivlen = packet_get_keyiv_len(MODE_OUT);
569 packet_get_keyiv(MODE_OUT, iv, ivlen);
570 buffer_put_string(&m, iv, ivlen);
571 ivlen = packet_get_keyiv_len(MODE_OUT);
572 packet_get_keyiv(MODE_IN, iv, ivlen);
573 buffer_put_string(&m, iv, ivlen);
576 /* Kex for rekeying */
577 mm_send_kex(&m, *pmonitor->m_pkex);
580 debug3("%s: Sending new keys: %p %p",
581 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
584 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
585 fatal("%s: conversion of newkeys failed", __func__);
587 buffer_put_string(&m, blob, bloblen);
590 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
591 fatal("%s: conversion of newkeys failed", __func__);
593 buffer_put_string(&m, blob, bloblen);
596 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
597 buffer_put_int(&m, seqnr);
598 buffer_put_int64(&m, blocks);
599 buffer_put_int(&m, packets);
600 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
601 buffer_put_int(&m, seqnr);
602 buffer_put_int64(&m, blocks);
603 buffer_put_int(&m, packets);
605 debug3("%s: New keys have been sent", __func__);
607 /* More key context */
608 plen = packet_get_keycontext(MODE_OUT, NULL);
610 packet_get_keycontext(MODE_OUT, p);
611 buffer_put_string(&m, p, plen);
614 plen = packet_get_keycontext(MODE_IN, NULL);
616 packet_get_keycontext(MODE_IN, p);
617 buffer_put_string(&m, p, plen);
620 /* Compression state */
621 debug3("%s: Sending compression state", __func__);
622 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
623 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
625 /* Network I/O buffers */
626 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
627 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
629 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
630 debug3("%s: Finished sending state", __func__);
636 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
643 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
645 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
646 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
648 success = buffer_get_int(&m);
650 debug3("%s: pty alloc failed", __func__);
654 p = buffer_get_string(&m, NULL);
657 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
660 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
661 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
668 mm_session_pty_cleanup2(Session *s)
675 buffer_put_cstring(&m, s->tty);
676 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
679 /* closed dup'ed master */
680 if (close(s->ptymaster) < 0)
681 error("close(s->ptymaster): %s", strerror(errno));
683 /* unlink pty from session */
689 mm_start_pam(char *user)
693 debug3("%s entering", __func__);
694 if (!options.use_pam)
695 fatal("UsePAM=no, but ended up in %s anyway", __func__);
698 buffer_put_cstring(&m, user);
700 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
706 mm_do_pam_account(void)
711 debug3("%s entering", __func__);
712 if (!options.use_pam)
713 fatal("UsePAM=no, but ended up in %s anyway", __func__);
716 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
718 mm_request_receive_expect(pmonitor->m_recvfd,
719 MONITOR_ANS_PAM_ACCOUNT, &m);
720 ret = buffer_get_int(&m);
724 debug3("%s returning %d", __func__, ret);
730 mm_sshpam_init_ctx(Authctxt *authctxt)
735 debug3("%s", __func__);
737 buffer_put_cstring(&m, authctxt->user);
738 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
739 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
740 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
741 success = buffer_get_int(&m);
743 debug3("%s: pam_init_ctx failed", __func__);
752 mm_sshpam_query(void *ctx, char **name, char **info,
753 u_int *num, char ***prompts, u_int **echo_on)
758 debug3("%s", __func__);
760 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
761 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
762 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
763 ret = buffer_get_int(&m);
764 debug3("%s: pam_query returned %d", __func__, ret);
765 *name = buffer_get_string(&m, NULL);
766 *info = buffer_get_string(&m, NULL);
767 *num = buffer_get_int(&m);
768 *prompts = xmalloc((*num + 1) * sizeof(char *));
769 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
770 for (i = 0; i < *num; ++i) {
771 (*prompts)[i] = buffer_get_string(&m, NULL);
772 (*echo_on)[i] = buffer_get_int(&m);
779 mm_sshpam_respond(void *ctx, u_int num, char **resp)
784 debug3("%s", __func__);
786 buffer_put_int(&m, num);
787 for (i = 0; i < num; ++i)
788 buffer_put_cstring(&m, resp[i]);
789 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
790 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
791 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
792 ret = buffer_get_int(&m);
793 debug3("%s: pam_respond returned %d", __func__, ret);
799 mm_sshpam_free_ctx(void *ctxtp)
803 debug3("%s", __func__);
805 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
806 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
807 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
812 /* Request process termination */
820 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
825 mm_ssh1_session_key(BIGNUM *num)
831 buffer_put_bignum2(&m, num);
832 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
834 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
836 rsafail = buffer_get_int(&m);
837 buffer_get_bignum2(&m, num);
845 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
846 char ***prompts, u_int **echo_on)
849 *infotxt = xstrdup("");
851 *prompts = xmalloc(*numprompts * sizeof(char *));
852 *echo_on = xmalloc(*numprompts * sizeof(u_int));
857 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
858 u_int *numprompts, char ***prompts, u_int **echo_on)
864 debug3("%s: entering", __func__);
867 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
869 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
871 success = buffer_get_int(&m);
873 debug3("%s: no challenge", __func__);
878 /* Get the challenge, and format the response */
879 challenge = buffer_get_string(&m, NULL);
882 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
883 (*prompts)[0] = challenge;
885 debug3("%s: received challenge: %s", __func__, challenge);
891 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
896 debug3("%s: entering", __func__);
897 if (numresponses != 1)
901 buffer_put_cstring(&m, responses[0]);
902 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
904 mm_request_receive_expect(pmonitor->m_recvfd,
905 MONITOR_ANS_BSDAUTHRESPOND, &m);
907 authok = buffer_get_int(&m);
910 return ((authok == 0) ? -1 : 0);
914 mm_skey_query(void *ctx, char **name, char **infotxt,
915 u_int *numprompts, char ***prompts, u_int **echo_on)
922 debug3("%s: entering", __func__);
925 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
927 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
929 success = buffer_get_int(&m);
931 debug3("%s: no challenge", __func__);
936 /* Get the challenge, and format the response */
937 challenge = buffer_get_string(&m, NULL);
940 debug3("%s: received challenge: %s", __func__, challenge);
942 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
944 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
946 strlcpy(p, challenge, len);
947 strlcat(p, SKEY_PROMPT, len);
955 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
960 debug3("%s: entering", __func__);
961 if (numresponses != 1)
965 buffer_put_cstring(&m, responses[0]);
966 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
968 mm_request_receive_expect(pmonitor->m_recvfd,
969 MONITOR_ANS_SKEYRESPOND, &m);
971 authok = buffer_get_int(&m);
974 return ((authok == 0) ? -1 : 0);
978 mm_ssh1_session_id(u_char session_id[16])
983 debug3("%s entering", __func__);
986 for (i = 0; i < 16; i++)
987 buffer_put_char(&m, session_id[i]);
989 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
994 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1000 int allowed = 0, have_forced = 0;
1002 debug3("%s entering", __func__);
1005 buffer_put_bignum2(&m, client_n);
1007 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1008 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1010 allowed = buffer_get_int(&m);
1012 /* fake forced command */
1013 auth_clear_options();
1014 have_forced = buffer_get_int(&m);
1015 forced_command = have_forced ? xstrdup("true") : NULL;
1017 if (allowed && rkey != NULL) {
1018 blob = buffer_get_string(&m, &blen);
1019 if ((key = key_from_blob(blob, blen)) == NULL)
1020 fatal("%s: key_from_blob failed", __func__);
1031 mm_auth_rsa_generate_challenge(Key *key)
1038 debug3("%s entering", __func__);
1040 if ((challenge = BN_new()) == NULL)
1041 fatal("%s: BN_new failed", __func__);
1043 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1044 if (key_to_blob(key, &blob, &blen) == 0)
1045 fatal("%s: key_to_blob failed", __func__);
1046 key->type = KEY_RSA1;
1049 buffer_put_string(&m, blob, blen);
1052 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1053 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1055 buffer_get_bignum2(&m, challenge);
1062 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1069 debug3("%s entering", __func__);
1071 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1072 if (key_to_blob(key, &blob, &blen) == 0)
1073 fatal("%s: key_to_blob failed", __func__);
1074 key->type = KEY_RSA1;
1077 buffer_put_string(&m, blob, blen);
1078 buffer_put_string(&m, response, 16);
1081 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1082 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1084 success = buffer_get_int(&m);
1092 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid)
1097 /* Client doesn't get to see the context */
1101 buffer_put_string(&m, oid->elements, oid->length);
1103 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1104 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1106 major = buffer_get_int(&m);
1113 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1114 gss_buffer_desc *out, OM_uint32 *flags)
1121 buffer_put_string(&m, in->value, in->length);
1123 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1124 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1126 major = buffer_get_int(&m);
1127 out->value = buffer_get_string(&m, &len);
1130 *flags = buffer_get_int(&m);
1138 mm_ssh_gssapi_userok(char *user)
1141 int authenticated = 0;
1145 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1146 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1149 authenticated = buffer_get_int(&m);
1152 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1153 return (authenticated);