1 /* $OpenBSD: monitor_wrap.c,v 1.48 2006/07/22 20:48:23 stevesk 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>
32 #include <openssl/bn.h>
33 #include <openssl/dh.h>
43 #include "auth-options.h"
49 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
52 #define TARGET_OS_MAC 1
57 #include "monitor_wrap.h"
60 #include "monitor_fdpass.h"
74 extern Newkeys *newkeys[];
75 extern z_stream incoming_stream;
76 extern z_stream outgoing_stream;
77 extern struct monitor *pmonitor;
78 extern Buffer input, output;
79 extern Buffer loginmsg;
80 extern ServerOptions options;
86 * m_pid is only set in the privileged part, and
87 * points to the unprivileged child.
89 return (pmonitor && pmonitor->m_pid > 0);
93 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
95 u_int mlen = buffer_len(m);
98 debug3("%s entering: type %d", __func__, type);
100 put_u32(buf, mlen + 1);
101 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
102 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
103 fatal("%s: write: %s", __func__, strerror(errno));
104 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
105 fatal("%s: write: %s", __func__, strerror(errno));
109 mm_request_receive(int sock, Buffer *m)
114 debug3("%s entering", __func__);
116 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
119 fatal("%s: read: %s", __func__, strerror(errno));
121 msg_len = get_u32(buf);
122 if (msg_len > 256 * 1024)
123 fatal("%s: read: bad msg_len %d", __func__, msg_len);
125 buffer_append_space(m, msg_len);
126 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
127 fatal("%s: read: %s", __func__, strerror(errno));
131 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
135 debug3("%s entering: type %d", __func__, type);
137 mm_request_receive(sock, m);
138 rtype = buffer_get_char(m);
140 fatal("%s: read: rtype %d != type %d", __func__,
145 mm_choose_dh(int min, int nbits, int max)
152 buffer_put_int(&m, min);
153 buffer_put_int(&m, nbits);
154 buffer_put_int(&m, max);
156 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
158 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
159 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
161 success = buffer_get_char(&m);
163 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
165 if ((p = BN_new()) == NULL)
166 fatal("%s: BN_new failed", __func__);
167 if ((g = BN_new()) == NULL)
168 fatal("%s: BN_new failed", __func__);
169 buffer_get_bignum2(&m, p);
170 buffer_get_bignum2(&m, g);
172 debug3("%s: remaining %d", __func__, buffer_len(&m));
175 return (dh_new_group(g, p));
179 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
181 Kex *kex = *pmonitor->m_pkex;
184 debug3("%s entering", __func__);
187 buffer_put_int(&m, kex->host_key_index(key));
188 buffer_put_string(&m, data, datalen);
190 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
192 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
193 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
194 *sigp = buffer_get_string(&m, lenp);
201 mm_getpwnamallow(const char *username)
207 debug3("%s entering", __func__);
210 buffer_put_cstring(&m, username);
212 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
214 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
215 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
217 if (buffer_get_char(&m) == 0) {
221 pw = buffer_get_string(&m, &pwlen);
222 if (pwlen != sizeof(struct passwd))
223 fatal("%s: struct passwd size mismatch", __func__);
224 pw->pw_name = buffer_get_string(&m, NULL);
225 pw->pw_passwd = buffer_get_string(&m, NULL);
226 pw->pw_gecos = buffer_get_string(&m, NULL);
227 #ifdef HAVE_PW_CLASS_IN_PASSWD
228 pw->pw_class = buffer_get_string(&m, NULL);
230 pw->pw_dir = buffer_get_string(&m, NULL);
231 pw->pw_shell = buffer_get_string(&m, NULL);
238 mm_auth2_read_banner(void)
243 debug3("%s entering", __func__);
246 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
249 mm_request_receive_expect(pmonitor->m_recvfd,
250 MONITOR_ANS_AUTH2_READ_BANNER, &m);
251 banner = buffer_get_string(&m, NULL);
254 /* treat empty banner as missing banner */
255 if (strlen(banner) == 0) {
262 /* Inform the privileged process about service and style */
265 mm_inform_authserv(char *service, char *style)
269 debug3("%s entering", __func__);
272 buffer_put_cstring(&m, service);
273 buffer_put_cstring(&m, style ? style : "");
275 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
280 /* Do the password authentication */
282 mm_auth_password(Authctxt *authctxt, char *password)
285 int authenticated = 0;
287 debug3("%s entering", __func__);
290 buffer_put_cstring(&m, password);
291 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
293 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
294 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
296 authenticated = buffer_get_int(&m);
300 debug3("%s: user %sauthenticated",
301 __func__, authenticated ? "" : "not ");
302 return (authenticated);
306 mm_user_key_allowed(struct passwd *pw, Key *key)
308 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
312 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
315 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
319 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
320 char *host, Key *key)
324 key->type = KEY_RSA; /* XXX hack for key_to_blob */
325 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
326 key->type = KEY_RSA1;
331 mm_send_debug(Buffer *m)
335 while (buffer_len(m)) {
336 msg = buffer_get_string(m, NULL);
337 debug3("%s: Sending debug: %s", __func__, msg);
338 packet_send_debug("%s", msg);
344 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
349 int allowed = 0, have_forced = 0;
351 debug3("%s entering", __func__);
353 /* Convert the key to a blob and the pass it over */
354 if (!key_to_blob(key, &blob, &len))
358 buffer_put_int(&m, type);
359 buffer_put_cstring(&m, user ? user : "");
360 buffer_put_cstring(&m, host ? host : "");
361 buffer_put_string(&m, blob, len);
364 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
366 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
367 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
369 allowed = buffer_get_int(&m);
371 /* fake forced command */
372 auth_clear_options();
373 have_forced = buffer_get_int(&m);
374 forced_command = have_forced ? xstrdup("true") : NULL;
376 /* Send potential debug messages */
385 * This key verify needs to send the key type along, because the
386 * privileged parent makes the decision if the key is allowed
387 * for authentication.
391 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
398 debug3("%s entering", __func__);
400 /* Convert the key to a blob and the pass it over */
401 if (!key_to_blob(key, &blob, &len))
405 buffer_put_string(&m, blob, len);
406 buffer_put_string(&m, sig, siglen);
407 buffer_put_string(&m, data, datalen);
410 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
412 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
413 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
415 verified = buffer_get_int(&m);
422 /* Export key state after authentication */
424 mm_newkeys_from_blob(u_char *blob, int blen)
428 Newkeys *newkey = NULL;
433 debug3("%s: %p(%d)", __func__, blob, blen);
435 dump_base64(stderr, blob, blen);
438 buffer_append(&b, blob, blen);
440 newkey = xmalloc(sizeof(*newkey));
443 comp = &newkey->comp;
446 enc->name = buffer_get_string(&b, NULL);
447 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
448 enc->enabled = buffer_get_int(&b);
449 enc->block_size = buffer_get_int(&b);
450 enc->key = buffer_get_string(&b, &enc->key_len);
451 enc->iv = buffer_get_string(&b, &len);
452 if (len != enc->block_size)
453 fatal("%s: bad ivlen: expected %u != %u", __func__,
454 enc->block_size, len);
456 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
457 fatal("%s: bad cipher name %s or pointer %p", __func__,
458 enc->name, enc->cipher);
461 mac->name = buffer_get_string(&b, NULL);
462 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
463 fatal("%s: can not init mac %s", __func__, mac->name);
464 mac->enabled = buffer_get_int(&b);
465 mac->key = buffer_get_string(&b, &len);
466 if (len > mac->key_len)
467 fatal("%s: bad mac key length: %u > %d", __func__, len,
472 comp->type = buffer_get_int(&b);
473 comp->enabled = buffer_get_int(&b);
474 comp->name = buffer_get_string(&b, NULL);
476 len = buffer_len(&b);
478 error("newkeys_from_blob: remaining bytes in blob %u", len);
484 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
491 Newkeys *newkey = newkeys[mode];
493 debug3("%s: converting %p", __func__, newkey);
495 if (newkey == NULL) {
496 error("%s: newkey == NULL", __func__);
501 comp = &newkey->comp;
505 buffer_put_cstring(&b, enc->name);
506 /* The cipher struct is constant and shared, you export pointer */
507 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
508 buffer_put_int(&b, enc->enabled);
509 buffer_put_int(&b, enc->block_size);
510 buffer_put_string(&b, enc->key, enc->key_len);
511 packet_get_keyiv(mode, enc->iv, enc->block_size);
512 buffer_put_string(&b, enc->iv, enc->block_size);
515 buffer_put_cstring(&b, mac->name);
516 buffer_put_int(&b, mac->enabled);
517 buffer_put_string(&b, mac->key, mac->key_len);
520 buffer_put_int(&b, comp->type);
521 buffer_put_int(&b, comp->enabled);
522 buffer_put_cstring(&b, comp->name);
524 len = buffer_len(&b);
528 *blobp = xmalloc(len);
529 memcpy(*blobp, buffer_ptr(&b), len);
531 memset(buffer_ptr(&b), 0, len);
537 mm_send_kex(Buffer *m, Kex *kex)
539 buffer_put_string(m, kex->session_id, kex->session_id_len);
540 buffer_put_int(m, kex->we_need);
541 buffer_put_int(m, kex->hostkey_type);
542 buffer_put_int(m, kex->kex_type);
543 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
544 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
545 buffer_put_int(m, kex->flags);
546 buffer_put_cstring(m, kex->client_version_string);
547 buffer_put_cstring(m, kex->server_version_string);
551 mm_send_keystate(struct monitor *monitor)
556 u_int32_t seqnr, packets;
566 buffer_put_int(&m, packet_get_protocol_flags());
568 buffer_put_int(&m, packet_get_ssh1_cipher());
570 debug3("%s: Sending ssh1 KEY+IV", __func__);
571 keylen = packet_get_encryption_key(NULL);
572 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
573 keylen = packet_get_encryption_key(key);
574 buffer_put_string(&m, key, keylen);
575 memset(key, 0, keylen);
578 ivlen = packet_get_keyiv_len(MODE_OUT);
579 packet_get_keyiv(MODE_OUT, iv, ivlen);
580 buffer_put_string(&m, iv, ivlen);
581 ivlen = packet_get_keyiv_len(MODE_OUT);
582 packet_get_keyiv(MODE_IN, iv, ivlen);
583 buffer_put_string(&m, iv, ivlen);
586 /* Kex for rekeying */
587 mm_send_kex(&m, *monitor->m_pkex);
590 debug3("%s: Sending new keys: %p %p",
591 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
594 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
595 fatal("%s: conversion of newkeys failed", __func__);
597 buffer_put_string(&m, blob, bloblen);
600 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
601 fatal("%s: conversion of newkeys failed", __func__);
603 buffer_put_string(&m, blob, bloblen);
606 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
607 buffer_put_int(&m, seqnr);
608 buffer_put_int64(&m, blocks);
609 buffer_put_int(&m, packets);
610 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
611 buffer_put_int(&m, seqnr);
612 buffer_put_int64(&m, blocks);
613 buffer_put_int(&m, packets);
615 debug3("%s: New keys have been sent", __func__);
617 /* More key context */
618 plen = packet_get_keycontext(MODE_OUT, NULL);
620 packet_get_keycontext(MODE_OUT, p);
621 buffer_put_string(&m, p, plen);
624 plen = packet_get_keycontext(MODE_IN, NULL);
626 packet_get_keycontext(MODE_IN, p);
627 buffer_put_string(&m, p, plen);
630 /* Compression state */
631 debug3("%s: Sending compression state", __func__);
632 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
633 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
635 /* Network I/O buffers */
636 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
637 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
639 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
640 debug3("%s: Finished sending state", __func__);
646 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
653 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
655 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
656 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
658 success = buffer_get_int(&m);
660 debug3("%s: pty alloc failed", __func__);
664 p = buffer_get_string(&m, NULL);
665 msg = buffer_get_string(&m, NULL);
668 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
671 buffer_append(&loginmsg, msg, strlen(msg));
674 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
675 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
682 mm_session_pty_cleanup2(Session *s)
689 buffer_put_cstring(&m, s->tty);
690 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
693 /* closed dup'ed master */
694 if (close(s->ptymaster) < 0)
695 error("close(s->ptymaster): %s", strerror(errno));
697 /* unlink pty from session */
703 mm_start_pam(Authctxt *authctxt)
707 debug3("%s entering", __func__);
708 if (!options.use_pam)
709 fatal("UsePAM=no, but ended up in %s anyway", __func__);
712 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
718 mm_do_pam_account(void)
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_ACCOUNT, &m);
731 mm_request_receive_expect(pmonitor->m_recvfd,
732 MONITOR_ANS_PAM_ACCOUNT, &m);
733 ret = buffer_get_int(&m);
734 msg = buffer_get_string(&m, NULL);
735 buffer_append(&loginmsg, msg, strlen(msg));
740 debug3("%s returning %d", __func__, ret);
746 mm_sshpam_init_ctx(Authctxt *authctxt)
751 debug3("%s", __func__);
753 buffer_put_cstring(&m, authctxt->user);
754 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
755 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
756 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
757 success = buffer_get_int(&m);
759 debug3("%s: pam_init_ctx failed", __func__);
768 mm_sshpam_query(void *ctx, char **name, char **info,
769 u_int *num, char ***prompts, u_int **echo_on)
775 debug3("%s", __func__);
777 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
778 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
779 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
780 ret = buffer_get_int(&m);
781 debug3("%s: pam_query returned %d", __func__, ret);
782 *name = buffer_get_string(&m, NULL);
783 *info = buffer_get_string(&m, NULL);
784 *num = buffer_get_int(&m);
785 if (*num > PAM_MAX_NUM_MSG)
786 fatal("%s: recieved %u PAM messages, expected <= %u",
787 __func__, *num, PAM_MAX_NUM_MSG);
788 *prompts = xcalloc((*num + 1), sizeof(char *));
789 *echo_on = xcalloc((*num + 1), sizeof(u_int));
790 for (i = 0; i < *num; ++i) {
791 (*prompts)[i] = buffer_get_string(&m, NULL);
792 (*echo_on)[i] = buffer_get_int(&m);
799 mm_sshpam_respond(void *ctx, u_int num, char **resp)
805 debug3("%s", __func__);
807 buffer_put_int(&m, num);
808 for (i = 0; i < num; ++i)
809 buffer_put_cstring(&m, resp[i]);
810 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
811 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
812 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
813 ret = buffer_get_int(&m);
814 debug3("%s: pam_respond returned %d", __func__, ret);
820 mm_sshpam_free_ctx(void *ctxtp)
824 debug3("%s", __func__);
826 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
827 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
828 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
833 /* Request process termination */
841 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
846 mm_ssh1_session_key(BIGNUM *num)
852 buffer_put_bignum2(&m, num);
853 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
855 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
857 rsafail = buffer_get_int(&m);
858 buffer_get_bignum2(&m, num);
866 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
867 char ***prompts, u_int **echo_on)
870 *infotxt = xstrdup("");
872 *prompts = xcalloc(*numprompts, sizeof(char *));
873 *echo_on = xcalloc(*numprompts, sizeof(u_int));
878 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
879 u_int *numprompts, char ***prompts, u_int **echo_on)
885 debug3("%s: entering", __func__);
888 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
890 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
892 success = buffer_get_int(&m);
894 debug3("%s: no challenge", __func__);
899 /* Get the challenge, and format the response */
900 challenge = buffer_get_string(&m, NULL);
903 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
904 (*prompts)[0] = challenge;
906 debug3("%s: received challenge: %s", __func__, challenge);
912 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
917 debug3("%s: entering", __func__);
918 if (numresponses != 1)
922 buffer_put_cstring(&m, responses[0]);
923 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
925 mm_request_receive_expect(pmonitor->m_recvfd,
926 MONITOR_ANS_BSDAUTHRESPOND, &m);
928 authok = buffer_get_int(&m);
931 return ((authok == 0) ? -1 : 0);
936 mm_skey_query(void *ctx, char **name, char **infotxt,
937 u_int *numprompts, char ***prompts, u_int **echo_on)
944 debug3("%s: entering", __func__);
947 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
949 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
951 success = buffer_get_int(&m);
953 debug3("%s: no challenge", __func__);
958 /* Get the challenge, and format the response */
959 challenge = buffer_get_string(&m, NULL);
962 debug3("%s: received challenge: %s", __func__, challenge);
964 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
966 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
973 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
978 debug3("%s: entering", __func__);
979 if (numresponses != 1)
983 buffer_put_cstring(&m, responses[0]);
984 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
986 mm_request_receive_expect(pmonitor->m_recvfd,
987 MONITOR_ANS_SKEYRESPOND, &m);
989 authok = buffer_get_int(&m);
992 return ((authok == 0) ? -1 : 0);
997 mm_ssh1_session_id(u_char session_id[16])
1002 debug3("%s entering", __func__);
1005 for (i = 0; i < 16; i++)
1006 buffer_put_char(&m, session_id[i]);
1008 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1013 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1019 int allowed = 0, have_forced = 0;
1021 debug3("%s entering", __func__);
1024 buffer_put_bignum2(&m, client_n);
1026 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1027 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1029 allowed = buffer_get_int(&m);
1031 /* fake forced command */
1032 auth_clear_options();
1033 have_forced = buffer_get_int(&m);
1034 forced_command = have_forced ? xstrdup("true") : NULL;
1036 if (allowed && rkey != NULL) {
1037 blob = buffer_get_string(&m, &blen);
1038 if ((key = key_from_blob(blob, blen)) == NULL)
1039 fatal("%s: key_from_blob failed", __func__);
1050 mm_auth_rsa_generate_challenge(Key *key)
1057 debug3("%s entering", __func__);
1059 if ((challenge = BN_new()) == NULL)
1060 fatal("%s: BN_new failed", __func__);
1062 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1063 if (key_to_blob(key, &blob, &blen) == 0)
1064 fatal("%s: key_to_blob failed", __func__);
1065 key->type = KEY_RSA1;
1068 buffer_put_string(&m, blob, blen);
1071 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1072 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1074 buffer_get_bignum2(&m, challenge);
1081 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1088 debug3("%s entering", __func__);
1090 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1091 if (key_to_blob(key, &blob, &blen) == 0)
1092 fatal("%s: key_to_blob failed", __func__);
1093 key->type = KEY_RSA1;
1096 buffer_put_string(&m, blob, blen);
1097 buffer_put_string(&m, response, 16);
1100 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1101 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1103 success = buffer_get_int(&m);
1109 #ifdef SSH_AUDIT_EVENTS
1111 mm_audit_event(ssh_audit_event_t event)
1115 debug3("%s entering", __func__);
1118 buffer_put_int(&m, event);
1120 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1125 mm_audit_run_command(const char *command)
1129 debug3("%s entering command %s", __func__, command);
1132 buffer_put_cstring(&m, command);
1134 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1137 #endif /* SSH_AUDIT_EVENTS */
1141 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1146 /* Client doesn't get to see the context */
1150 buffer_put_string(&m, goid->elements, goid->length);
1152 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1153 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1155 major = buffer_get_int(&m);
1162 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1163 gss_buffer_desc *out, OM_uint32 *flags)
1170 buffer_put_string(&m, in->value, in->length);
1172 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1173 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1175 major = buffer_get_int(&m);
1176 out->value = buffer_get_string(&m, &len);
1179 *flags = buffer_get_int(&m);
1187 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1193 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1194 buffer_put_string(&m, gssmic->value, gssmic->length);
1196 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1197 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1200 major = buffer_get_int(&m);
1206 mm_ssh_gssapi_userok(char *user)
1209 int authenticated = 0;
1213 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1214 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1217 authenticated = buffer_get_int(&m);
1220 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1221 return (authenticated);