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 1.40 2005/05/24 17:32:43 avsm 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: %s", __func__, strerror(errno));
98 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
99 fatal("%s: write: %s", __func__, strerror(errno));
103 mm_request_receive(int sock, Buffer *m)
108 debug3("%s entering", __func__);
110 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
113 fatal("%s: read: %s", __func__, strerror(errno));
115 msg_len = GET_32BIT(buf);
116 if (msg_len > 256 * 1024)
117 fatal("%s: read: bad msg_len %d", __func__, msg_len);
119 buffer_append_space(m, msg_len);
120 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
121 fatal("%s: read: %s", __func__, strerror(errno));
125 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
129 debug3("%s entering: type %d", __func__, type);
131 mm_request_receive(sock, m);
132 rtype = buffer_get_char(m);
134 fatal("%s: read: rtype %d != type %d", __func__,
139 mm_choose_dh(int min, int nbits, int max)
146 buffer_put_int(&m, min);
147 buffer_put_int(&m, nbits);
148 buffer_put_int(&m, max);
150 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
152 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
153 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
155 success = buffer_get_char(&m);
157 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
159 if ((p = BN_new()) == NULL)
160 fatal("%s: BN_new failed", __func__);
161 if ((g = BN_new()) == NULL)
162 fatal("%s: BN_new failed", __func__);
163 buffer_get_bignum2(&m, p);
164 buffer_get_bignum2(&m, g);
166 debug3("%s: remaining %d", __func__, buffer_len(&m));
169 return (dh_new_group(g, p));
173 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
175 Kex *kex = *pmonitor->m_pkex;
178 debug3("%s entering", __func__);
181 buffer_put_int(&m, kex->host_key_index(key));
182 buffer_put_string(&m, data, datalen);
184 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
186 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
187 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
188 *sigp = buffer_get_string(&m, lenp);
195 mm_getpwnamallow(const char *username)
201 debug3("%s entering", __func__);
204 buffer_put_cstring(&m, username);
206 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
208 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
209 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
211 if (buffer_get_char(&m) == 0) {
215 pw = buffer_get_string(&m, &pwlen);
216 if (pwlen != sizeof(struct passwd))
217 fatal("%s: struct passwd size mismatch", __func__);
218 pw->pw_name = buffer_get_string(&m, NULL);
219 pw->pw_passwd = buffer_get_string(&m, NULL);
220 pw->pw_gecos = buffer_get_string(&m, NULL);
221 #ifdef HAVE_PW_CLASS_IN_PASSWD
222 pw->pw_class = buffer_get_string(&m, NULL);
224 pw->pw_dir = buffer_get_string(&m, NULL);
225 pw->pw_shell = buffer_get_string(&m, NULL);
232 mm_auth2_read_banner(void)
237 debug3("%s entering", __func__);
240 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
243 mm_request_receive_expect(pmonitor->m_recvfd,
244 MONITOR_ANS_AUTH2_READ_BANNER, &m);
245 banner = buffer_get_string(&m, NULL);
248 /* treat empty banner as missing banner */
249 if (strlen(banner) == 0) {
256 /* Inform the privileged process about service and style */
259 mm_inform_authserv(char *service, char *style)
263 debug3("%s entering", __func__);
266 buffer_put_cstring(&m, service);
267 buffer_put_cstring(&m, style ? style : "");
269 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
274 /* Do the password authentication */
276 mm_auth_password(Authctxt *authctxt, char *password)
279 int authenticated = 0;
281 debug3("%s entering", __func__);
284 buffer_put_cstring(&m, password);
285 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
287 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
288 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
290 authenticated = buffer_get_int(&m);
294 debug3("%s: user %sauthenticated",
295 __func__, authenticated ? "" : "not ");
296 return (authenticated);
300 mm_user_key_allowed(struct passwd *pw, Key *key)
302 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
306 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
309 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
313 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
314 char *host, Key *key)
318 key->type = KEY_RSA; /* XXX hack for key_to_blob */
319 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
320 key->type = KEY_RSA1;
325 mm_send_debug(Buffer *m)
329 while (buffer_len(m)) {
330 msg = buffer_get_string(m, NULL);
331 debug3("%s: Sending debug: %s", __func__, msg);
332 packet_send_debug("%s", msg);
338 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
343 int allowed = 0, have_forced = 0;
345 debug3("%s entering", __func__);
347 /* Convert the key to a blob and the pass it over */
348 if (!key_to_blob(key, &blob, &len))
352 buffer_put_int(&m, type);
353 buffer_put_cstring(&m, user ? user : "");
354 buffer_put_cstring(&m, host ? host : "");
355 buffer_put_string(&m, blob, len);
358 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
360 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
361 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
363 allowed = buffer_get_int(&m);
365 /* fake forced command */
366 auth_clear_options();
367 have_forced = buffer_get_int(&m);
368 forced_command = have_forced ? xstrdup("true") : NULL;
370 /* Send potential debug messages */
379 * This key verify needs to send the key type along, because the
380 * privileged parent makes the decision if the key is allowed
381 * for authentication.
385 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
392 debug3("%s entering", __func__);
394 /* Convert the key to a blob and the pass it over */
395 if (!key_to_blob(key, &blob, &len))
399 buffer_put_string(&m, blob, len);
400 buffer_put_string(&m, sig, siglen);
401 buffer_put_string(&m, data, datalen);
404 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
406 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
407 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
409 verified = buffer_get_int(&m);
416 /* Export key state after authentication */
418 mm_newkeys_from_blob(u_char *blob, int blen)
422 Newkeys *newkey = NULL;
427 debug3("%s: %p(%d)", __func__, blob, blen);
429 dump_base64(stderr, blob, blen);
432 buffer_append(&b, blob, blen);
434 newkey = xmalloc(sizeof(*newkey));
437 comp = &newkey->comp;
440 enc->name = buffer_get_string(&b, NULL);
441 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
442 enc->enabled = buffer_get_int(&b);
443 enc->block_size = buffer_get_int(&b);
444 enc->key = buffer_get_string(&b, &enc->key_len);
445 enc->iv = buffer_get_string(&b, &len);
446 if (len != enc->block_size)
447 fatal("%s: bad ivlen: expected %u != %u", __func__,
448 enc->block_size, len);
450 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
451 fatal("%s: bad cipher name %s or pointer %p", __func__,
452 enc->name, enc->cipher);
455 mac->name = buffer_get_string(&b, NULL);
456 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
457 fatal("%s: can not init mac %s", __func__, mac->name);
458 mac->enabled = buffer_get_int(&b);
459 mac->key = buffer_get_string(&b, &len);
460 if (len > mac->key_len)
461 fatal("%s: bad mac key length: %u > %d", __func__, len,
466 comp->type = buffer_get_int(&b);
467 comp->enabled = buffer_get_int(&b);
468 comp->name = buffer_get_string(&b, NULL);
470 len = buffer_len(&b);
472 error("newkeys_from_blob: remaining bytes in blob %u", len);
478 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
485 Newkeys *newkey = newkeys[mode];
487 debug3("%s: converting %p", __func__, newkey);
489 if (newkey == NULL) {
490 error("%s: newkey == NULL", __func__);
495 comp = &newkey->comp;
499 buffer_put_cstring(&b, enc->name);
500 /* The cipher struct is constant and shared, you export pointer */
501 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
502 buffer_put_int(&b, enc->enabled);
503 buffer_put_int(&b, enc->block_size);
504 buffer_put_string(&b, enc->key, enc->key_len);
505 packet_get_keyiv(mode, enc->iv, enc->block_size);
506 buffer_put_string(&b, enc->iv, enc->block_size);
509 buffer_put_cstring(&b, mac->name);
510 buffer_put_int(&b, mac->enabled);
511 buffer_put_string(&b, mac->key, mac->key_len);
514 buffer_put_int(&b, comp->type);
515 buffer_put_int(&b, comp->enabled);
516 buffer_put_cstring(&b, comp->name);
518 len = buffer_len(&b);
522 *blobp = xmalloc(len);
523 memcpy(*blobp, buffer_ptr(&b), len);
525 memset(buffer_ptr(&b), 0, len);
531 mm_send_kex(Buffer *m, Kex *kex)
533 buffer_put_string(m, kex->session_id, kex->session_id_len);
534 buffer_put_int(m, kex->we_need);
535 buffer_put_int(m, kex->hostkey_type);
536 buffer_put_int(m, kex->kex_type);
537 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
538 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
539 buffer_put_int(m, kex->flags);
540 buffer_put_cstring(m, kex->client_version_string);
541 buffer_put_cstring(m, kex->server_version_string);
545 mm_send_keystate(struct monitor *monitor)
550 u_int32_t seqnr, packets;
560 buffer_put_int(&m, packet_get_protocol_flags());
562 buffer_put_int(&m, packet_get_ssh1_cipher());
564 debug3("%s: Sending ssh1 KEY+IV", __func__);
565 keylen = packet_get_encryption_key(NULL);
566 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
567 keylen = packet_get_encryption_key(key);
568 buffer_put_string(&m, key, keylen);
569 memset(key, 0, keylen);
572 ivlen = packet_get_keyiv_len(MODE_OUT);
573 packet_get_keyiv(MODE_OUT, iv, ivlen);
574 buffer_put_string(&m, iv, ivlen);
575 ivlen = packet_get_keyiv_len(MODE_OUT);
576 packet_get_keyiv(MODE_IN, iv, ivlen);
577 buffer_put_string(&m, iv, ivlen);
580 /* Kex for rekeying */
581 mm_send_kex(&m, *monitor->m_pkex);
584 debug3("%s: Sending new keys: %p %p",
585 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
588 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
589 fatal("%s: conversion of newkeys failed", __func__);
591 buffer_put_string(&m, blob, bloblen);
594 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
595 fatal("%s: conversion of newkeys failed", __func__);
597 buffer_put_string(&m, blob, bloblen);
600 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
601 buffer_put_int(&m, seqnr);
602 buffer_put_int64(&m, blocks);
603 buffer_put_int(&m, packets);
604 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
605 buffer_put_int(&m, seqnr);
606 buffer_put_int64(&m, blocks);
607 buffer_put_int(&m, packets);
609 debug3("%s: New keys have been sent", __func__);
611 /* More key context */
612 plen = packet_get_keycontext(MODE_OUT, NULL);
614 packet_get_keycontext(MODE_OUT, p);
615 buffer_put_string(&m, p, plen);
618 plen = packet_get_keycontext(MODE_IN, NULL);
620 packet_get_keycontext(MODE_IN, p);
621 buffer_put_string(&m, p, plen);
624 /* Compression state */
625 debug3("%s: Sending compression state", __func__);
626 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
627 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
629 /* Network I/O buffers */
630 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
631 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
633 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
634 debug3("%s: Finished sending state", __func__);
640 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
647 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
649 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
650 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
652 success = buffer_get_int(&m);
654 debug3("%s: pty alloc failed", __func__);
658 p = buffer_get_string(&m, NULL);
659 msg = buffer_get_string(&m, NULL);
662 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
665 buffer_append(&loginmsg, msg, strlen(msg));
668 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
669 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
676 mm_session_pty_cleanup2(Session *s)
683 buffer_put_cstring(&m, s->tty);
684 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
687 /* closed dup'ed master */
688 if (close(s->ptymaster) < 0)
689 error("close(s->ptymaster): %s", strerror(errno));
691 /* unlink pty from session */
697 mm_start_pam(Authctxt *authctxt)
701 debug3("%s entering", __func__);
702 if (!options.use_pam)
703 fatal("UsePAM=no, but ended up in %s anyway", __func__);
706 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
712 mm_do_pam_account(void)
718 debug3("%s entering", __func__);
719 if (!options.use_pam)
720 fatal("UsePAM=no, but ended up in %s anyway", __func__);
723 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
725 mm_request_receive_expect(pmonitor->m_recvfd,
726 MONITOR_ANS_PAM_ACCOUNT, &m);
727 ret = buffer_get_int(&m);
728 msg = buffer_get_string(&m, NULL);
729 buffer_append(&loginmsg, msg, strlen(msg));
734 debug3("%s returning %d", __func__, ret);
740 mm_sshpam_init_ctx(Authctxt *authctxt)
745 debug3("%s", __func__);
747 buffer_put_cstring(&m, authctxt->user);
748 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
749 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
750 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
751 success = buffer_get_int(&m);
753 debug3("%s: pam_init_ctx failed", __func__);
762 mm_sshpam_query(void *ctx, char **name, char **info,
763 u_int *num, char ***prompts, u_int **echo_on)
769 debug3("%s", __func__);
771 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
772 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
773 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
774 ret = buffer_get_int(&m);
775 debug3("%s: pam_query returned %d", __func__, ret);
776 *name = buffer_get_string(&m, NULL);
777 *info = buffer_get_string(&m, NULL);
778 *num = buffer_get_int(&m);
779 *prompts = xmalloc((*num + 1) * sizeof(char *));
780 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
781 for (i = 0; i < *num; ++i) {
782 (*prompts)[i] = buffer_get_string(&m, NULL);
783 (*echo_on)[i] = buffer_get_int(&m);
790 mm_sshpam_respond(void *ctx, u_int num, char **resp)
796 debug3("%s", __func__);
798 buffer_put_int(&m, num);
799 for (i = 0; i < num; ++i)
800 buffer_put_cstring(&m, resp[i]);
801 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
802 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
803 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
804 ret = buffer_get_int(&m);
805 debug3("%s: pam_respond returned %d", __func__, ret);
811 mm_sshpam_free_ctx(void *ctxtp)
815 debug3("%s", __func__);
817 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
818 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
819 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
824 /* Request process termination */
832 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
837 mm_ssh1_session_key(BIGNUM *num)
843 buffer_put_bignum2(&m, num);
844 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
846 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
848 rsafail = buffer_get_int(&m);
849 buffer_get_bignum2(&m, num);
857 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
858 char ***prompts, u_int **echo_on)
861 *infotxt = xstrdup("");
863 *prompts = xmalloc(*numprompts * sizeof(char *));
864 *echo_on = xmalloc(*numprompts * sizeof(u_int));
869 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
870 u_int *numprompts, char ***prompts, u_int **echo_on)
876 debug3("%s: entering", __func__);
879 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
881 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
883 success = buffer_get_int(&m);
885 debug3("%s: no challenge", __func__);
890 /* Get the challenge, and format the response */
891 challenge = buffer_get_string(&m, NULL);
894 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
895 (*prompts)[0] = challenge;
897 debug3("%s: received challenge: %s", __func__, challenge);
903 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
908 debug3("%s: entering", __func__);
909 if (numresponses != 1)
913 buffer_put_cstring(&m, responses[0]);
914 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
916 mm_request_receive_expect(pmonitor->m_recvfd,
917 MONITOR_ANS_BSDAUTHRESPOND, &m);
919 authok = buffer_get_int(&m);
922 return ((authok == 0) ? -1 : 0);
927 mm_skey_query(void *ctx, char **name, char **infotxt,
928 u_int *numprompts, char ***prompts, u_int **echo_on)
935 debug3("%s: entering", __func__);
938 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
940 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
942 success = buffer_get_int(&m);
944 debug3("%s: no challenge", __func__);
949 /* Get the challenge, and format the response */
950 challenge = buffer_get_string(&m, NULL);
953 debug3("%s: received challenge: %s", __func__, challenge);
955 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
957 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
959 strlcpy(p, challenge, len);
960 strlcat(p, SKEY_PROMPT, len);
968 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
973 debug3("%s: entering", __func__);
974 if (numresponses != 1)
978 buffer_put_cstring(&m, responses[0]);
979 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
981 mm_request_receive_expect(pmonitor->m_recvfd,
982 MONITOR_ANS_SKEYRESPOND, &m);
984 authok = buffer_get_int(&m);
987 return ((authok == 0) ? -1 : 0);
992 mm_ssh1_session_id(u_char session_id[16])
997 debug3("%s entering", __func__);
1000 for (i = 0; i < 16; i++)
1001 buffer_put_char(&m, session_id[i]);
1003 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1008 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1014 int allowed = 0, have_forced = 0;
1016 debug3("%s entering", __func__);
1019 buffer_put_bignum2(&m, client_n);
1021 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1022 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1024 allowed = buffer_get_int(&m);
1026 /* fake forced command */
1027 auth_clear_options();
1028 have_forced = buffer_get_int(&m);
1029 forced_command = have_forced ? xstrdup("true") : NULL;
1031 if (allowed && rkey != NULL) {
1032 blob = buffer_get_string(&m, &blen);
1033 if ((key = key_from_blob(blob, blen)) == NULL)
1034 fatal("%s: key_from_blob failed", __func__);
1045 mm_auth_rsa_generate_challenge(Key *key)
1052 debug3("%s entering", __func__);
1054 if ((challenge = BN_new()) == NULL)
1055 fatal("%s: BN_new failed", __func__);
1057 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1058 if (key_to_blob(key, &blob, &blen) == 0)
1059 fatal("%s: key_to_blob failed", __func__);
1060 key->type = KEY_RSA1;
1063 buffer_put_string(&m, blob, blen);
1066 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1067 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1069 buffer_get_bignum2(&m, challenge);
1076 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1083 debug3("%s entering", __func__);
1085 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1086 if (key_to_blob(key, &blob, &blen) == 0)
1087 fatal("%s: key_to_blob failed", __func__);
1088 key->type = KEY_RSA1;
1091 buffer_put_string(&m, blob, blen);
1092 buffer_put_string(&m, response, 16);
1095 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1096 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1098 success = buffer_get_int(&m);
1104 #ifdef SSH_AUDIT_EVENTS
1106 mm_audit_event(ssh_audit_event_t event)
1110 debug3("%s entering", __func__);
1113 buffer_put_int(&m, event);
1115 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1120 mm_audit_run_command(const char *command)
1124 debug3("%s entering command %s", __func__, command);
1127 buffer_put_cstring(&m, command);
1129 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1132 #endif /* SSH_AUDIT_EVENTS */
1136 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1141 /* Client doesn't get to see the context */
1145 buffer_put_string(&m, goid->elements, goid->length);
1147 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1148 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1150 major = buffer_get_int(&m);
1157 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1158 gss_buffer_desc *out, OM_uint32 *flags)
1165 buffer_put_string(&m, in->value, in->length);
1167 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1168 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1170 major = buffer_get_int(&m);
1171 out->value = buffer_get_string(&m, &len);
1174 *flags = buffer_get_int(&m);
1182 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1188 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1189 buffer_put_string(&m, gssmic->value, gssmic->length);
1191 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1192 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1195 major = buffer_get_int(&m);
1201 mm_ssh_gssapi_userok(char *user)
1204 int authenticated = 0;
1208 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1209 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1212 authenticated = buffer_get_int(&m);
1215 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1216 return (authenticated);
1220 mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash)
1227 buffer_put_string(&m, data->value, data->length);
1229 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m);
1230 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m);
1232 major = buffer_get_int(&m);
1233 hash->value = buffer_get_string(&m, &len);
1242 mm_ssh_gssapi_last_error(Gssctxt *ctx, OM_uint32 *major, OM_uint32 *minor) {
1249 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSERR, &m);
1250 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSERR, &m);
1252 maj = buffer_get_int(&m);
1253 min = buffer_get_int(&m);
1255 if (major) *major=maj;
1256 if (minor) *minor=min;
1258 errstr=buffer_get_string(&m,NULL);
1266 mm_gss_indicate_mechs(OM_uint32 *minor_status, gss_OID_set *mech_set)
1269 OM_uint32 major,minor;
1276 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSMECHS, &m);
1277 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSMECHS,
1279 major=buffer_get_int(&m);
1280 count=buffer_get_int(&m);
1282 gss_create_empty_oid_set(&minor,mech_set);
1284 oid.elements=buffer_get_string(&m,&length);
1286 gss_add_oid_set_member(&minor,&oid,mech_set);
1295 mm_ssh_gssapi_localname(char **lname)
1300 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSLOCALNAME, &m);
1302 debug3("%s: waiting for MONITOR_ANS_GSSLOCALNAME", __func__);
1303 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSLOCALNAME,
1306 *lname = buffer_get_string(&m, NULL);
1309 if (lname[0] == '\0') {
1310 debug3("%s: gssapi identity mapping failed", __func__);
1312 debug3("%s: gssapi identity mapped to %s", __func__, *lname);