1 /* $OpenBSD: monitor_wrap.c,v 1.60 2007/10/29 04:08:08 dtucker 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);
241 /* copy options block as a Match directive may have changed some */
242 newopts = buffer_get_string(&m, &len);
243 if (len != sizeof(*newopts))
244 fatal("%s: option block size mismatch", __func__);
245 if (newopts->banner != NULL)
246 newopts->banner = buffer_get_string(&m, NULL);
247 copy_set_server_options(&options, newopts, 1);
256 mm_auth2_read_banner(void)
261 debug3("%s entering", __func__);
264 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
267 mm_request_receive_expect(pmonitor->m_recvfd,
268 MONITOR_ANS_AUTH2_READ_BANNER, &m);
269 banner = buffer_get_string(&m, NULL);
272 /* treat empty banner as missing banner */
273 if (strlen(banner) == 0) {
280 /* Inform the privileged process about service and style */
283 mm_inform_authserv(char *service, char *style)
287 debug3("%s entering", __func__);
290 buffer_put_cstring(&m, service);
291 buffer_put_cstring(&m, style ? style : "");
293 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
298 /* Do the password authentication */
300 mm_auth_password(Authctxt *authctxt, char *password)
303 int authenticated = 0;
305 debug3("%s entering", __func__);
308 buffer_put_cstring(&m, password);
309 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
311 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
312 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
314 authenticated = buffer_get_int(&m);
318 debug3("%s: user %sauthenticated",
319 __func__, authenticated ? "" : "not ");
320 return (authenticated);
324 mm_user_key_allowed(struct passwd *pw, Key *key)
326 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
330 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
333 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
337 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
338 char *host, Key *key)
342 key->type = KEY_RSA; /* XXX hack for key_to_blob */
343 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
344 key->type = KEY_RSA1;
349 mm_send_debug(Buffer *m)
353 while (buffer_len(m)) {
354 msg = buffer_get_string(m, NULL);
355 debug3("%s: Sending debug: %s", __func__, msg);
356 packet_send_debug("%s", msg);
362 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
367 int allowed = 0, have_forced = 0;
369 debug3("%s entering", __func__);
371 /* Convert the key to a blob and the pass it over */
372 if (!key_to_blob(key, &blob, &len))
376 buffer_put_int(&m, type);
377 buffer_put_cstring(&m, user ? user : "");
378 buffer_put_cstring(&m, host ? host : "");
379 buffer_put_string(&m, blob, len);
382 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
384 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
385 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
387 allowed = buffer_get_int(&m);
389 /* fake forced command */
390 auth_clear_options();
391 have_forced = buffer_get_int(&m);
392 forced_command = have_forced ? xstrdup("true") : NULL;
394 /* Send potential debug messages */
403 * This key verify needs to send the key type along, because the
404 * privileged parent makes the decision if the key is allowed
405 * for authentication.
409 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
416 debug3("%s entering", __func__);
418 /* Convert the key to a blob and the pass it over */
419 if (!key_to_blob(key, &blob, &len))
423 buffer_put_string(&m, blob, len);
424 buffer_put_string(&m, sig, siglen);
425 buffer_put_string(&m, data, datalen);
428 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
430 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
431 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
433 verified = buffer_get_int(&m);
440 /* Export key state after authentication */
442 mm_newkeys_from_blob(u_char *blob, int blen)
446 Newkeys *newkey = NULL;
451 debug3("%s: %p(%d)", __func__, blob, blen);
453 dump_base64(stderr, blob, blen);
456 buffer_append(&b, blob, blen);
458 newkey = xmalloc(sizeof(*newkey));
461 comp = &newkey->comp;
464 enc->name = buffer_get_string(&b, NULL);
465 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
466 enc->enabled = buffer_get_int(&b);
467 enc->block_size = buffer_get_int(&b);
468 enc->key = buffer_get_string(&b, &enc->key_len);
469 enc->iv = buffer_get_string(&b, &len);
470 if (len != enc->block_size)
471 fatal("%s: bad ivlen: expected %u != %u", __func__,
472 enc->block_size, len);
474 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
475 fatal("%s: bad cipher name %s or pointer %p", __func__,
476 enc->name, enc->cipher);
479 mac->name = buffer_get_string(&b, NULL);
480 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
481 fatal("%s: can not setup mac %s", __func__, mac->name);
482 mac->enabled = buffer_get_int(&b);
483 mac->key = buffer_get_string(&b, &len);
484 if (len > mac->key_len)
485 fatal("%s: bad mac key length: %u > %d", __func__, len,
490 comp->type = buffer_get_int(&b);
491 comp->enabled = buffer_get_int(&b);
492 comp->name = buffer_get_string(&b, NULL);
494 len = buffer_len(&b);
496 error("newkeys_from_blob: remaining bytes in blob %u", len);
502 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
509 Newkeys *newkey = newkeys[mode];
511 debug3("%s: converting %p", __func__, newkey);
513 if (newkey == NULL) {
514 error("%s: newkey == NULL", __func__);
519 comp = &newkey->comp;
523 buffer_put_cstring(&b, enc->name);
524 /* The cipher struct is constant and shared, you export pointer */
525 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
526 buffer_put_int(&b, enc->enabled);
527 buffer_put_int(&b, enc->block_size);
528 buffer_put_string(&b, enc->key, enc->key_len);
529 packet_get_keyiv(mode, enc->iv, enc->block_size);
530 buffer_put_string(&b, enc->iv, enc->block_size);
533 buffer_put_cstring(&b, mac->name);
534 buffer_put_int(&b, mac->enabled);
535 buffer_put_string(&b, mac->key, mac->key_len);
538 buffer_put_int(&b, comp->type);
539 buffer_put_int(&b, comp->enabled);
540 buffer_put_cstring(&b, comp->name);
542 len = buffer_len(&b);
546 *blobp = xmalloc(len);
547 memcpy(*blobp, buffer_ptr(&b), len);
549 memset(buffer_ptr(&b), 0, len);
555 mm_send_kex(Buffer *m, Kex *kex)
557 buffer_put_string(m, kex->session_id, kex->session_id_len);
558 buffer_put_int(m, kex->we_need);
559 buffer_put_int(m, kex->hostkey_type);
560 buffer_put_int(m, kex->kex_type);
561 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
562 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
563 buffer_put_int(m, kex->flags);
564 buffer_put_cstring(m, kex->client_version_string);
565 buffer_put_cstring(m, kex->server_version_string);
569 mm_send_keystate(struct monitor *monitor)
574 u_int32_t seqnr, packets;
584 buffer_put_int(&m, packet_get_protocol_flags());
586 buffer_put_int(&m, packet_get_ssh1_cipher());
588 debug3("%s: Sending ssh1 KEY+IV", __func__);
589 keylen = packet_get_encryption_key(NULL);
590 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
591 keylen = packet_get_encryption_key(key);
592 buffer_put_string(&m, key, keylen);
593 memset(key, 0, keylen);
596 ivlen = packet_get_keyiv_len(MODE_OUT);
597 packet_get_keyiv(MODE_OUT, iv, ivlen);
598 buffer_put_string(&m, iv, ivlen);
599 ivlen = packet_get_keyiv_len(MODE_OUT);
600 packet_get_keyiv(MODE_IN, iv, ivlen);
601 buffer_put_string(&m, iv, ivlen);
604 /* Kex for rekeying */
605 mm_send_kex(&m, *monitor->m_pkex);
608 debug3("%s: Sending new keys: %p %p",
609 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
612 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
613 fatal("%s: conversion of newkeys failed", __func__);
615 buffer_put_string(&m, blob, bloblen);
618 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
619 fatal("%s: conversion of newkeys failed", __func__);
621 buffer_put_string(&m, blob, bloblen);
624 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
625 buffer_put_int(&m, seqnr);
626 buffer_put_int64(&m, blocks);
627 buffer_put_int(&m, packets);
628 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
629 buffer_put_int(&m, seqnr);
630 buffer_put_int64(&m, blocks);
631 buffer_put_int(&m, packets);
633 debug3("%s: New keys have been sent", __func__);
635 /* More key context */
636 plen = packet_get_keycontext(MODE_OUT, NULL);
638 packet_get_keycontext(MODE_OUT, p);
639 buffer_put_string(&m, p, plen);
642 plen = packet_get_keycontext(MODE_IN, NULL);
644 packet_get_keycontext(MODE_IN, p);
645 buffer_put_string(&m, p, plen);
648 /* Compression state */
649 debug3("%s: Sending compression state", __func__);
650 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
651 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
653 /* Network I/O buffers */
654 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
655 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
657 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
658 debug3("%s: Finished sending state", __func__);
664 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
671 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
673 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
674 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
676 success = buffer_get_int(&m);
678 debug3("%s: pty alloc failed", __func__);
682 p = buffer_get_string(&m, NULL);
683 msg = buffer_get_string(&m, NULL);
686 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
689 buffer_append(&loginmsg, msg, strlen(msg));
692 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
693 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
694 fatal("%s: receive fds failed", __func__);
701 mm_session_pty_cleanup2(Session *s)
708 buffer_put_cstring(&m, s->tty);
709 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
712 /* closed dup'ed master */
713 if (close(s->ptymaster) < 0)
714 error("close(s->ptymaster): %s", strerror(errno));
716 /* unlink pty from session */
722 mm_start_pam(Authctxt *authctxt)
726 debug3("%s entering", __func__);
727 if (!options.use_pam)
728 fatal("UsePAM=no, but ended up in %s anyway", __func__);
731 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
737 mm_do_pam_account(void)
743 debug3("%s entering", __func__);
744 if (!options.use_pam)
745 fatal("UsePAM=no, but ended up in %s anyway", __func__);
748 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
750 mm_request_receive_expect(pmonitor->m_recvfd,
751 MONITOR_ANS_PAM_ACCOUNT, &m);
752 ret = buffer_get_int(&m);
753 msg = buffer_get_string(&m, NULL);
754 buffer_append(&loginmsg, msg, strlen(msg));
759 debug3("%s returning %d", __func__, ret);
765 mm_sshpam_init_ctx(Authctxt *authctxt)
770 debug3("%s", __func__);
772 buffer_put_cstring(&m, authctxt->user);
773 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
774 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
775 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
776 success = buffer_get_int(&m);
778 debug3("%s: pam_init_ctx failed", __func__);
787 mm_sshpam_query(void *ctx, char **name, char **info,
788 u_int *num, char ***prompts, u_int **echo_on)
794 debug3("%s", __func__);
796 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
797 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
798 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
799 ret = buffer_get_int(&m);
800 debug3("%s: pam_query returned %d", __func__, ret);
801 *name = buffer_get_string(&m, NULL);
802 *info = buffer_get_string(&m, NULL);
803 *num = buffer_get_int(&m);
804 if (*num > PAM_MAX_NUM_MSG)
805 fatal("%s: recieved %u PAM messages, expected <= %u",
806 __func__, *num, PAM_MAX_NUM_MSG);
807 *prompts = xcalloc((*num + 1), sizeof(char *));
808 *echo_on = xcalloc((*num + 1), sizeof(u_int));
809 for (i = 0; i < *num; ++i) {
810 (*prompts)[i] = buffer_get_string(&m, NULL);
811 (*echo_on)[i] = buffer_get_int(&m);
818 mm_sshpam_respond(void *ctx, u_int num, char **resp)
824 debug3("%s", __func__);
826 buffer_put_int(&m, num);
827 for (i = 0; i < num; ++i)
828 buffer_put_cstring(&m, resp[i]);
829 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
830 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
831 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
832 ret = buffer_get_int(&m);
833 debug3("%s: pam_respond returned %d", __func__, ret);
839 mm_sshpam_free_ctx(void *ctxtp)
843 debug3("%s", __func__);
845 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
846 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
847 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
852 /* Request process termination */
860 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
865 mm_ssh1_session_key(BIGNUM *num)
871 buffer_put_bignum2(&m, num);
872 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
874 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
876 rsafail = buffer_get_int(&m);
877 buffer_get_bignum2(&m, num);
885 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
886 char ***prompts, u_int **echo_on)
889 *infotxt = xstrdup("");
891 *prompts = xcalloc(*numprompts, sizeof(char *));
892 *echo_on = xcalloc(*numprompts, sizeof(u_int));
897 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
898 u_int *numprompts, char ***prompts, u_int **echo_on)
904 debug3("%s: entering", __func__);
907 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
909 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
911 success = buffer_get_int(&m);
913 debug3("%s: no challenge", __func__);
918 /* Get the challenge, and format the response */
919 challenge = buffer_get_string(&m, NULL);
922 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
923 (*prompts)[0] = challenge;
925 debug3("%s: received challenge: %s", __func__, challenge);
931 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
936 debug3("%s: entering", __func__);
937 if (numresponses != 1)
941 buffer_put_cstring(&m, responses[0]);
942 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
944 mm_request_receive_expect(pmonitor->m_recvfd,
945 MONITOR_ANS_BSDAUTHRESPOND, &m);
947 authok = buffer_get_int(&m);
950 return ((authok == 0) ? -1 : 0);
955 mm_skey_query(void *ctx, char **name, char **infotxt,
956 u_int *numprompts, char ***prompts, u_int **echo_on)
962 debug3("%s: entering", __func__);
965 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
967 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
969 success = buffer_get_int(&m);
971 debug3("%s: no challenge", __func__);
976 /* Get the challenge, and format the response */
977 challenge = buffer_get_string(&m, NULL);
980 debug3("%s: received challenge: %s", __func__, challenge);
982 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
984 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
991 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
996 debug3("%s: entering", __func__);
997 if (numresponses != 1)
1001 buffer_put_cstring(&m, responses[0]);
1002 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1004 mm_request_receive_expect(pmonitor->m_recvfd,
1005 MONITOR_ANS_SKEYRESPOND, &m);
1007 authok = buffer_get_int(&m);
1010 return ((authok == 0) ? -1 : 0);
1015 mm_ssh1_session_id(u_char session_id[16])
1020 debug3("%s entering", __func__);
1023 for (i = 0; i < 16; i++)
1024 buffer_put_char(&m, session_id[i]);
1026 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1031 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1037 int allowed = 0, have_forced = 0;
1039 debug3("%s entering", __func__);
1042 buffer_put_bignum2(&m, client_n);
1044 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1045 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1047 allowed = buffer_get_int(&m);
1049 /* fake forced command */
1050 auth_clear_options();
1051 have_forced = buffer_get_int(&m);
1052 forced_command = have_forced ? xstrdup("true") : NULL;
1054 if (allowed && rkey != NULL) {
1055 blob = buffer_get_string(&m, &blen);
1056 if ((key = key_from_blob(blob, blen)) == NULL)
1057 fatal("%s: key_from_blob failed", __func__);
1068 mm_auth_rsa_generate_challenge(Key *key)
1075 debug3("%s entering", __func__);
1077 if ((challenge = BN_new()) == NULL)
1078 fatal("%s: BN_new failed", __func__);
1080 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1081 if (key_to_blob(key, &blob, &blen) == 0)
1082 fatal("%s: key_to_blob failed", __func__);
1083 key->type = KEY_RSA1;
1086 buffer_put_string(&m, blob, blen);
1089 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1090 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1092 buffer_get_bignum2(&m, challenge);
1099 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1106 debug3("%s entering", __func__);
1108 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1109 if (key_to_blob(key, &blob, &blen) == 0)
1110 fatal("%s: key_to_blob failed", __func__);
1111 key->type = KEY_RSA1;
1114 buffer_put_string(&m, blob, blen);
1115 buffer_put_string(&m, response, 16);
1118 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1119 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1121 success = buffer_get_int(&m);
1127 #ifdef SSH_AUDIT_EVENTS
1129 mm_audit_event(ssh_audit_event_t event)
1133 debug3("%s entering", __func__);
1136 buffer_put_int(&m, event);
1138 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1143 mm_audit_run_command(const char *command)
1147 debug3("%s entering command %s", __func__, command);
1150 buffer_put_cstring(&m, command);
1152 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1155 #endif /* SSH_AUDIT_EVENTS */
1159 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1164 /* Client doesn't get to see the context */
1168 buffer_put_string(&m, goid->elements, goid->length);
1170 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1171 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1173 major = buffer_get_int(&m);
1180 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1181 gss_buffer_desc *out, OM_uint32 *flags)
1188 buffer_put_string(&m, in->value, in->length);
1190 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1191 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1193 major = buffer_get_int(&m);
1194 out->value = buffer_get_string(&m, &len);
1197 *flags = buffer_get_int(&m);
1205 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1211 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1212 buffer_put_string(&m, gssmic->value, gssmic->length);
1214 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1215 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1218 major = buffer_get_int(&m);
1224 mm_ssh_gssapi_userok(char *user)
1227 int authenticated = 0;
1231 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1232 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1235 authenticated = buffer_get_int(&m);
1238 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1239 return (authenticated);