1 /* $OpenBSD: monitor_wrap.c,v 1.57 2007/06/07 19:37:34 pvalchev 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>
53 #include "auth-options.h"
57 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
60 #define TARGET_OS_MAC 1
68 #include "monitor_wrap.h"
70 #include "monitor_fdpass.h"
80 extern Newkeys *newkeys[];
81 extern z_stream incoming_stream;
82 extern z_stream outgoing_stream;
83 extern struct monitor *pmonitor;
84 extern Buffer input, output;
85 extern Buffer loginmsg;
86 extern ServerOptions options;
92 * m_pid is only set in the privileged part, and
93 * points to the unprivileged child.
95 return (pmonitor && pmonitor->m_pid > 0);
99 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
101 u_int mlen = buffer_len(m);
104 debug3("%s entering: type %d", __func__, type);
106 put_u32(buf, mlen + 1);
107 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
108 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
109 fatal("%s: write: %s", __func__, strerror(errno));
110 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
111 fatal("%s: write: %s", __func__, strerror(errno));
115 mm_request_receive(int sock, Buffer *m)
120 debug3("%s entering", __func__);
122 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
125 fatal("%s: read: %s", __func__, strerror(errno));
127 msg_len = get_u32(buf);
128 if (msg_len > 256 * 1024)
129 fatal("%s: read: bad msg_len %d", __func__, msg_len);
131 buffer_append_space(m, msg_len);
132 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
133 fatal("%s: read: %s", __func__, strerror(errno));
137 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
141 debug3("%s entering: type %d", __func__, type);
143 mm_request_receive(sock, m);
144 rtype = buffer_get_char(m);
146 fatal("%s: read: rtype %d != type %d", __func__,
151 mm_choose_dh(int min, int nbits, int max)
158 buffer_put_int(&m, min);
159 buffer_put_int(&m, nbits);
160 buffer_put_int(&m, max);
162 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
164 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
165 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
167 success = buffer_get_char(&m);
169 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
171 if ((p = BN_new()) == NULL)
172 fatal("%s: BN_new failed", __func__);
173 if ((g = BN_new()) == NULL)
174 fatal("%s: BN_new failed", __func__);
175 buffer_get_bignum2(&m, p);
176 buffer_get_bignum2(&m, g);
178 debug3("%s: remaining %d", __func__, buffer_len(&m));
181 return (dh_new_group(g, p));
185 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
187 Kex *kex = *pmonitor->m_pkex;
190 debug3("%s entering", __func__);
193 buffer_put_int(&m, kex->host_key_index(key));
194 buffer_put_string(&m, data, datalen);
196 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
198 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
199 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
200 *sigp = buffer_get_string(&m, lenp);
207 mm_getpwnamallow(const char *username)
212 ServerOptions *newopts;
214 debug3("%s entering", __func__);
217 buffer_put_cstring(&m, username);
219 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
221 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
222 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
224 if (buffer_get_char(&m) == 0) {
228 pw = buffer_get_string(&m, &len);
229 if (len != sizeof(struct passwd))
230 fatal("%s: struct passwd size mismatch", __func__);
231 pw->pw_name = buffer_get_string(&m, NULL);
232 pw->pw_passwd = buffer_get_string(&m, NULL);
233 pw->pw_gecos = buffer_get_string(&m, NULL);
234 #ifdef HAVE_PW_CLASS_IN_PASSWD
235 pw->pw_class = buffer_get_string(&m, NULL);
237 pw->pw_dir = buffer_get_string(&m, NULL);
238 pw->pw_shell = buffer_get_string(&m, NULL);
240 /* copy options block as a Match directive may have changed some */
241 newopts = buffer_get_string(&m, &len);
242 if (len != sizeof(*newopts))
243 fatal("%s: option block size mismatch", __func__);
244 if (newopts->banner != NULL)
245 newopts->banner = buffer_get_string(&m, NULL);
246 copy_set_server_options(&options, newopts, 1);
255 mm_auth2_read_banner(void)
260 debug3("%s entering", __func__);
263 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
266 mm_request_receive_expect(pmonitor->m_recvfd,
267 MONITOR_ANS_AUTH2_READ_BANNER, &m);
268 banner = buffer_get_string(&m, NULL);
271 /* treat empty banner as missing banner */
272 if (strlen(banner) == 0) {
279 /* Inform the privileged process about service and style */
282 mm_inform_authserv(char *service, char *style)
286 debug3("%s entering", __func__);
289 buffer_put_cstring(&m, service);
290 buffer_put_cstring(&m, style ? style : "");
292 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
297 /* Do the password authentication */
299 mm_auth_password(Authctxt *authctxt, char *password)
302 int authenticated = 0;
304 debug3("%s entering", __func__);
307 buffer_put_cstring(&m, password);
308 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
310 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
311 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
313 authenticated = buffer_get_int(&m);
317 debug3("%s: user %sauthenticated",
318 __func__, authenticated ? "" : "not ");
319 return (authenticated);
323 mm_user_key_allowed(struct passwd *pw, Key *key)
325 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
329 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
332 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
336 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
337 char *host, Key *key)
341 key->type = KEY_RSA; /* XXX hack for key_to_blob */
342 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
343 key->type = KEY_RSA1;
348 mm_send_debug(Buffer *m)
352 while (buffer_len(m)) {
353 msg = buffer_get_string(m, NULL);
354 debug3("%s: Sending debug: %s", __func__, msg);
355 packet_send_debug("%s", msg);
361 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
366 int allowed = 0, have_forced = 0;
368 debug3("%s entering", __func__);
370 /* Convert the key to a blob and the pass it over */
371 if (!key_to_blob(key, &blob, &len))
375 buffer_put_int(&m, type);
376 buffer_put_cstring(&m, user ? user : "");
377 buffer_put_cstring(&m, host ? host : "");
378 buffer_put_string(&m, blob, len);
381 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
383 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
384 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
386 allowed = buffer_get_int(&m);
388 /* fake forced command */
389 auth_clear_options();
390 have_forced = buffer_get_int(&m);
391 forced_command = have_forced ? xstrdup("true") : NULL;
393 /* Send potential debug messages */
402 * This key verify needs to send the key type along, because the
403 * privileged parent makes the decision if the key is allowed
404 * for authentication.
408 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
415 debug3("%s entering", __func__);
417 /* Convert the key to a blob and the pass it over */
418 if (!key_to_blob(key, &blob, &len))
422 buffer_put_string(&m, blob, len);
423 buffer_put_string(&m, sig, siglen);
424 buffer_put_string(&m, data, datalen);
427 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
429 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
430 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
432 verified = buffer_get_int(&m);
439 /* Export key state after authentication */
441 mm_newkeys_from_blob(u_char *blob, int blen)
445 Newkeys *newkey = NULL;
450 debug3("%s: %p(%d)", __func__, blob, blen);
452 dump_base64(stderr, blob, blen);
455 buffer_append(&b, blob, blen);
457 newkey = xmalloc(sizeof(*newkey));
460 comp = &newkey->comp;
463 enc->name = buffer_get_string(&b, NULL);
464 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
465 enc->enabled = buffer_get_int(&b);
466 enc->block_size = buffer_get_int(&b);
467 enc->key = buffer_get_string(&b, &enc->key_len);
468 enc->iv = buffer_get_string(&b, &len);
469 if (len != enc->block_size)
470 fatal("%s: bad ivlen: expected %u != %u", __func__,
471 enc->block_size, len);
473 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
474 fatal("%s: bad cipher name %s or pointer %p", __func__,
475 enc->name, enc->cipher);
478 mac->name = buffer_get_string(&b, NULL);
479 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
480 fatal("%s: can not setup mac %s", __func__, mac->name);
481 mac->enabled = buffer_get_int(&b);
482 mac->key = buffer_get_string(&b, &len);
483 if (len > mac->key_len)
484 fatal("%s: bad mac key length: %u > %d", __func__, len,
489 comp->type = buffer_get_int(&b);
490 comp->enabled = buffer_get_int(&b);
491 comp->name = buffer_get_string(&b, NULL);
493 len = buffer_len(&b);
495 error("newkeys_from_blob: remaining bytes in blob %u", len);
501 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
508 Newkeys *newkey = newkeys[mode];
510 debug3("%s: converting %p", __func__, newkey);
512 if (newkey == NULL) {
513 error("%s: newkey == NULL", __func__);
518 comp = &newkey->comp;
522 buffer_put_cstring(&b, enc->name);
523 /* The cipher struct is constant and shared, you export pointer */
524 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
525 buffer_put_int(&b, enc->enabled);
526 buffer_put_int(&b, enc->block_size);
527 buffer_put_string(&b, enc->key, enc->key_len);
528 packet_get_keyiv(mode, enc->iv, enc->block_size);
529 buffer_put_string(&b, enc->iv, enc->block_size);
532 buffer_put_cstring(&b, mac->name);
533 buffer_put_int(&b, mac->enabled);
534 buffer_put_string(&b, mac->key, mac->key_len);
537 buffer_put_int(&b, comp->type);
538 buffer_put_int(&b, comp->enabled);
539 buffer_put_cstring(&b, comp->name);
541 len = buffer_len(&b);
545 *blobp = xmalloc(len);
546 memcpy(*blobp, buffer_ptr(&b), len);
548 memset(buffer_ptr(&b), 0, len);
554 mm_send_kex(Buffer *m, Kex *kex)
556 buffer_put_string(m, kex->session_id, kex->session_id_len);
557 buffer_put_int(m, kex->we_need);
558 buffer_put_int(m, kex->hostkey_type);
559 buffer_put_int(m, kex->kex_type);
560 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
561 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
562 buffer_put_int(m, kex->flags);
563 buffer_put_cstring(m, kex->client_version_string);
564 buffer_put_cstring(m, kex->server_version_string);
568 mm_send_keystate(struct monitor *monitor)
573 u_int32_t seqnr, packets;
583 buffer_put_int(&m, packet_get_protocol_flags());
585 buffer_put_int(&m, packet_get_ssh1_cipher());
587 debug3("%s: Sending ssh1 KEY+IV", __func__);
588 keylen = packet_get_encryption_key(NULL);
589 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
590 keylen = packet_get_encryption_key(key);
591 buffer_put_string(&m, key, keylen);
592 memset(key, 0, keylen);
595 ivlen = packet_get_keyiv_len(MODE_OUT);
596 packet_get_keyiv(MODE_OUT, iv, ivlen);
597 buffer_put_string(&m, iv, ivlen);
598 ivlen = packet_get_keyiv_len(MODE_OUT);
599 packet_get_keyiv(MODE_IN, iv, ivlen);
600 buffer_put_string(&m, iv, ivlen);
603 /* Kex for rekeying */
604 mm_send_kex(&m, *monitor->m_pkex);
607 debug3("%s: Sending new keys: %p %p",
608 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
611 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
612 fatal("%s: conversion of newkeys failed", __func__);
614 buffer_put_string(&m, blob, bloblen);
617 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
618 fatal("%s: conversion of newkeys failed", __func__);
620 buffer_put_string(&m, blob, bloblen);
623 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
624 buffer_put_int(&m, seqnr);
625 buffer_put_int64(&m, blocks);
626 buffer_put_int(&m, packets);
627 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
628 buffer_put_int(&m, seqnr);
629 buffer_put_int64(&m, blocks);
630 buffer_put_int(&m, packets);
632 debug3("%s: New keys have been sent", __func__);
634 /* More key context */
635 plen = packet_get_keycontext(MODE_OUT, NULL);
637 packet_get_keycontext(MODE_OUT, p);
638 buffer_put_string(&m, p, plen);
641 plen = packet_get_keycontext(MODE_IN, NULL);
643 packet_get_keycontext(MODE_IN, p);
644 buffer_put_string(&m, p, plen);
647 /* Compression state */
648 debug3("%s: Sending compression state", __func__);
649 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
650 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
652 /* Network I/O buffers */
653 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
654 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
656 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
657 debug3("%s: Finished sending state", __func__);
663 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
670 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
672 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
673 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
675 success = buffer_get_int(&m);
677 debug3("%s: pty alloc failed", __func__);
681 p = buffer_get_string(&m, NULL);
682 msg = buffer_get_string(&m, NULL);
685 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
688 buffer_append(&loginmsg, msg, strlen(msg));
691 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
692 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
699 mm_session_pty_cleanup2(Session *s)
706 buffer_put_cstring(&m, s->tty);
707 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
710 /* closed dup'ed master */
711 if (close(s->ptymaster) < 0)
712 error("close(s->ptymaster): %s", strerror(errno));
714 /* unlink pty from session */
720 mm_start_pam(Authctxt *authctxt)
724 debug3("%s entering", __func__);
725 if (!options.use_pam)
726 fatal("UsePAM=no, but ended up in %s anyway", __func__);
729 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
735 mm_do_pam_account(void)
741 debug3("%s entering", __func__);
742 if (!options.use_pam)
743 fatal("UsePAM=no, but ended up in %s anyway", __func__);
746 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
748 mm_request_receive_expect(pmonitor->m_recvfd,
749 MONITOR_ANS_PAM_ACCOUNT, &m);
750 ret = buffer_get_int(&m);
751 msg = buffer_get_string(&m, NULL);
752 buffer_append(&loginmsg, msg, strlen(msg));
757 debug3("%s returning %d", __func__, ret);
763 mm_sshpam_init_ctx(Authctxt *authctxt)
768 debug3("%s", __func__);
770 buffer_put_cstring(&m, authctxt->user);
771 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
772 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
773 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
774 success = buffer_get_int(&m);
776 debug3("%s: pam_init_ctx failed", __func__);
785 mm_sshpam_query(void *ctx, char **name, char **info,
786 u_int *num, char ***prompts, u_int **echo_on)
792 debug3("%s", __func__);
794 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
795 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
796 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
797 ret = buffer_get_int(&m);
798 debug3("%s: pam_query returned %d", __func__, ret);
799 *name = buffer_get_string(&m, NULL);
800 *info = buffer_get_string(&m, NULL);
801 *num = buffer_get_int(&m);
802 if (*num > PAM_MAX_NUM_MSG)
803 fatal("%s: recieved %u PAM messages, expected <= %u",
804 __func__, *num, PAM_MAX_NUM_MSG);
805 *prompts = xcalloc((*num + 1), sizeof(char *));
806 *echo_on = xcalloc((*num + 1), sizeof(u_int));
807 for (i = 0; i < *num; ++i) {
808 (*prompts)[i] = buffer_get_string(&m, NULL);
809 (*echo_on)[i] = buffer_get_int(&m);
816 mm_sshpam_respond(void *ctx, u_int num, char **resp)
822 debug3("%s", __func__);
824 buffer_put_int(&m, num);
825 for (i = 0; i < num; ++i)
826 buffer_put_cstring(&m, resp[i]);
827 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
828 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
829 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
830 ret = buffer_get_int(&m);
831 debug3("%s: pam_respond returned %d", __func__, ret);
837 mm_sshpam_free_ctx(void *ctxtp)
841 debug3("%s", __func__);
843 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
844 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
845 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
850 /* Request process termination */
858 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
863 mm_ssh1_session_key(BIGNUM *num)
869 buffer_put_bignum2(&m, num);
870 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
872 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
874 rsafail = buffer_get_int(&m);
875 buffer_get_bignum2(&m, num);
883 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
884 char ***prompts, u_int **echo_on)
887 *infotxt = xstrdup("");
889 *prompts = xcalloc(*numprompts, sizeof(char *));
890 *echo_on = xcalloc(*numprompts, sizeof(u_int));
895 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
896 u_int *numprompts, char ***prompts, u_int **echo_on)
902 debug3("%s: entering", __func__);
905 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
907 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
909 success = buffer_get_int(&m);
911 debug3("%s: no challenge", __func__);
916 /* Get the challenge, and format the response */
917 challenge = buffer_get_string(&m, NULL);
920 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
921 (*prompts)[0] = challenge;
923 debug3("%s: received challenge: %s", __func__, challenge);
929 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
934 debug3("%s: entering", __func__);
935 if (numresponses != 1)
939 buffer_put_cstring(&m, responses[0]);
940 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
942 mm_request_receive_expect(pmonitor->m_recvfd,
943 MONITOR_ANS_BSDAUTHRESPOND, &m);
945 authok = buffer_get_int(&m);
948 return ((authok == 0) ? -1 : 0);
953 mm_skey_query(void *ctx, char **name, char **infotxt,
954 u_int *numprompts, char ***prompts, u_int **echo_on)
960 debug3("%s: entering", __func__);
963 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
965 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
967 success = buffer_get_int(&m);
969 debug3("%s: no challenge", __func__);
974 /* Get the challenge, and format the response */
975 challenge = buffer_get_string(&m, NULL);
978 debug3("%s: received challenge: %s", __func__, challenge);
980 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
982 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
989 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
994 debug3("%s: entering", __func__);
995 if (numresponses != 1)
999 buffer_put_cstring(&m, responses[0]);
1000 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1002 mm_request_receive_expect(pmonitor->m_recvfd,
1003 MONITOR_ANS_SKEYRESPOND, &m);
1005 authok = buffer_get_int(&m);
1008 return ((authok == 0) ? -1 : 0);
1013 mm_ssh1_session_id(u_char session_id[16])
1018 debug3("%s entering", __func__);
1021 for (i = 0; i < 16; i++)
1022 buffer_put_char(&m, session_id[i]);
1024 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1029 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1035 int allowed = 0, have_forced = 0;
1037 debug3("%s entering", __func__);
1040 buffer_put_bignum2(&m, client_n);
1042 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1043 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1045 allowed = buffer_get_int(&m);
1047 /* fake forced command */
1048 auth_clear_options();
1049 have_forced = buffer_get_int(&m);
1050 forced_command = have_forced ? xstrdup("true") : NULL;
1052 if (allowed && rkey != NULL) {
1053 blob = buffer_get_string(&m, &blen);
1054 if ((key = key_from_blob(blob, blen)) == NULL)
1055 fatal("%s: key_from_blob failed", __func__);
1066 mm_auth_rsa_generate_challenge(Key *key)
1073 debug3("%s entering", __func__);
1075 if ((challenge = BN_new()) == NULL)
1076 fatal("%s: BN_new failed", __func__);
1078 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1079 if (key_to_blob(key, &blob, &blen) == 0)
1080 fatal("%s: key_to_blob failed", __func__);
1081 key->type = KEY_RSA1;
1084 buffer_put_string(&m, blob, blen);
1087 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1088 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1090 buffer_get_bignum2(&m, challenge);
1097 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1104 debug3("%s entering", __func__);
1106 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1107 if (key_to_blob(key, &blob, &blen) == 0)
1108 fatal("%s: key_to_blob failed", __func__);
1109 key->type = KEY_RSA1;
1112 buffer_put_string(&m, blob, blen);
1113 buffer_put_string(&m, response, 16);
1116 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1117 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1119 success = buffer_get_int(&m);
1125 #ifdef SSH_AUDIT_EVENTS
1127 mm_audit_event(ssh_audit_event_t event)
1131 debug3("%s entering", __func__);
1134 buffer_put_int(&m, event);
1136 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1141 mm_audit_run_command(const char *command)
1145 debug3("%s entering command %s", __func__, command);
1148 buffer_put_cstring(&m, command);
1150 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1153 #endif /* SSH_AUDIT_EVENTS */
1157 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1162 /* Client doesn't get to see the context */
1166 buffer_put_string(&m, goid->elements, goid->length);
1168 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1169 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1171 major = buffer_get_int(&m);
1178 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1179 gss_buffer_desc *out, OM_uint32 *flags)
1186 buffer_put_string(&m, in->value, in->length);
1188 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1189 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1191 major = buffer_get_int(&m);
1192 out->value = buffer_get_string(&m, &len);
1195 *flags = buffer_get_int(&m);
1203 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1209 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1210 buffer_put_string(&m, gssmic->value, gssmic->length);
1212 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1213 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1216 major = buffer_get_int(&m);
1222 mm_ssh_gssapi_userok(char *user)
1225 int authenticated = 0;
1229 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1230 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1233 authenticated = buffer_get_int(&m);
1236 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1237 return (authenticated);