1 /* $OpenBSD: monitor_wrap.c,v 1.79 2014/02/02 03:44:31 djm 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.
31 #include <sys/types.h>
42 #include <openssl/bn.h>
43 #include <openssl/dh.h>
44 #include <openssl/evp.h>
46 #include "openbsd-compat/sys-queue.h"
56 #include "auth-options.h"
60 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
63 #define TARGET_OS_MAC 1
71 #include "monitor_wrap.h"
73 #include "monitor_fdpass.h"
84 extern z_stream incoming_stream;
85 extern z_stream outgoing_stream;
86 extern struct monitor *pmonitor;
87 extern Buffer loginmsg;
88 extern ServerOptions options;
91 mm_log_handler(LogLevel level, const char *msg, void *ctx)
94 struct monitor *mon = (struct monitor *)ctx;
96 if (mon->m_log_sendfd == -1)
97 fatal("%s: no log channel", __func__);
99 buffer_init(&log_msg);
101 * Placeholder for packet length. Will be filled in with the actual
102 * packet length once the packet has been constucted. This saves
105 buffer_put_int(&log_msg, 0);
107 buffer_put_int(&log_msg, level);
108 buffer_put_cstring(&log_msg, msg);
109 put_u32(buffer_ptr(&log_msg), buffer_len(&log_msg) - 4);
110 if (atomicio(vwrite, mon->m_log_sendfd, buffer_ptr(&log_msg),
111 buffer_len(&log_msg)) != buffer_len(&log_msg))
112 fatal("%s: write: %s", __func__, strerror(errno));
113 buffer_free(&log_msg);
120 * m_pid is only set in the privileged part, and
121 * points to the unprivileged child.
123 return (pmonitor && pmonitor->m_pid > 0);
127 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
129 u_int mlen = buffer_len(m);
132 debug3("%s entering: type %d", __func__, type);
134 put_u32(buf, mlen + 1);
135 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
136 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
137 fatal("%s: write: %s", __func__, strerror(errno));
138 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
139 fatal("%s: write: %s", __func__, strerror(errno));
143 mm_request_receive(int sock, Buffer *m)
148 debug3("%s entering", __func__);
150 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
153 fatal("%s: read: %s", __func__, strerror(errno));
155 msg_len = get_u32(buf);
156 if (msg_len > 256 * 1024)
157 fatal("%s: read: bad msg_len %d", __func__, msg_len);
159 buffer_append_space(m, msg_len);
160 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
161 fatal("%s: read: %s", __func__, strerror(errno));
165 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
169 debug3("%s entering: type %d", __func__, type);
171 mm_request_receive(sock, m);
172 rtype = buffer_get_char(m);
174 fatal("%s: read: rtype %d != type %d", __func__,
179 mm_choose_dh(int min, int nbits, int max)
186 buffer_put_int(&m, min);
187 buffer_put_int(&m, nbits);
188 buffer_put_int(&m, max);
190 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
192 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
193 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
195 success = buffer_get_char(&m);
197 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
199 if ((p = BN_new()) == NULL)
200 fatal("%s: BN_new failed", __func__);
201 if ((g = BN_new()) == NULL)
202 fatal("%s: BN_new failed", __func__);
203 buffer_get_bignum2(&m, p);
204 buffer_get_bignum2(&m, g);
206 debug3("%s: remaining %d", __func__, buffer_len(&m));
209 return (dh_new_group(g, p));
213 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
215 Kex *kex = *pmonitor->m_pkex;
218 debug3("%s entering", __func__);
221 buffer_put_int(&m, kex->host_key_index(key));
222 buffer_put_string(&m, data, datalen);
224 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
226 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
227 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
228 *sigp = buffer_get_string(&m, lenp);
235 mm_getpwnamallow(const char *username)
240 ServerOptions *newopts;
242 debug3("%s entering", __func__);
245 buffer_put_cstring(&m, username);
247 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
249 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
250 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
252 if (buffer_get_char(&m) == 0) {
256 pw = buffer_get_string(&m, &len);
257 if (len != sizeof(struct passwd))
258 fatal("%s: struct passwd size mismatch", __func__);
259 pw->pw_name = buffer_get_string(&m, NULL);
260 pw->pw_passwd = buffer_get_string(&m, NULL);
261 #ifdef HAVE_STRUCT_PASSWD_PW_GECOS
262 pw->pw_gecos = buffer_get_string(&m, NULL);
264 #ifdef HAVE_STRUCT_PASSWD_PW_CLASS
265 pw->pw_class = buffer_get_string(&m, NULL);
267 pw->pw_dir = buffer_get_string(&m, NULL);
268 pw->pw_shell = buffer_get_string(&m, NULL);
271 /* copy options block as a Match directive may have changed some */
272 newopts = buffer_get_string(&m, &len);
273 if (len != sizeof(*newopts))
274 fatal("%s: option block size mismatch", __func__);
276 #define M_CP_STROPT(x) do { \
277 if (newopts->x != NULL) \
278 newopts->x = buffer_get_string(&m, NULL); \
280 #define M_CP_STRARRAYOPT(x, nx) do { \
281 for (i = 0; i < newopts->nx; i++) \
282 newopts->x[i] = buffer_get_string(&m, NULL); \
284 /* See comment in servconf.h */
285 COPY_MATCH_STRING_OPTS();
287 #undef M_CP_STRARRAYOPT
289 copy_set_server_options(&options, newopts, 1);
298 mm_auth2_read_banner(void)
303 debug3("%s entering", __func__);
306 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
309 mm_request_receive_expect(pmonitor->m_recvfd,
310 MONITOR_ANS_AUTH2_READ_BANNER, &m);
311 banner = buffer_get_string(&m, NULL);
314 /* treat empty banner as missing banner */
315 if (strlen(banner) == 0) {
322 /* Inform the privileged process about service and style */
325 mm_inform_authserv(char *service, char *style)
329 debug3("%s entering", __func__);
332 buffer_put_cstring(&m, service);
333 buffer_put_cstring(&m, style ? style : "");
335 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
340 /* Do the password authentication */
342 mm_auth_password(Authctxt *authctxt, char *password)
345 int authenticated = 0;
347 debug3("%s entering", __func__);
350 buffer_put_cstring(&m, password);
351 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
353 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
354 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
356 authenticated = buffer_get_int(&m);
360 debug3("%s: user %sauthenticated",
361 __func__, authenticated ? "" : "not ");
362 return (authenticated);
366 mm_user_key_allowed(struct passwd *pw, Key *key)
368 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
372 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
375 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
379 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
380 char *host, Key *key)
384 key->type = KEY_RSA; /* XXX hack for key_to_blob */
385 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
386 key->type = KEY_RSA1;
391 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
396 int allowed = 0, have_forced = 0;
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_int(&m, type);
406 buffer_put_cstring(&m, user ? user : "");
407 buffer_put_cstring(&m, host ? host : "");
408 buffer_put_string(&m, blob, len);
411 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
413 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
414 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
416 allowed = buffer_get_int(&m);
418 /* fake forced command */
419 auth_clear_options();
420 have_forced = buffer_get_int(&m);
421 forced_command = have_forced ? xstrdup("true") : NULL;
429 * This key verify needs to send the key type along, because the
430 * privileged parent makes the decision if the key is allowed
431 * for authentication.
435 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
442 debug3("%s entering", __func__);
444 /* Convert the key to a blob and the pass it over */
445 if (!key_to_blob(key, &blob, &len))
449 buffer_put_string(&m, blob, len);
450 buffer_put_string(&m, sig, siglen);
451 buffer_put_string(&m, data, datalen);
454 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
456 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
457 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
459 verified = buffer_get_int(&m);
466 /* Export key state after authentication */
468 mm_newkeys_from_blob(u_char *blob, int blen)
472 Newkeys *newkey = NULL;
477 debug3("%s: %p(%d)", __func__, blob, blen);
479 dump_base64(stderr, blob, blen);
482 buffer_append(&b, blob, blen);
484 newkey = xcalloc(1, sizeof(*newkey));
487 comp = &newkey->comp;
490 enc->name = buffer_get_string(&b, NULL);
491 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
492 enc->enabled = buffer_get_int(&b);
493 enc->block_size = buffer_get_int(&b);
494 enc->key = buffer_get_string(&b, &enc->key_len);
495 enc->iv = buffer_get_string(&b, &enc->iv_len);
497 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
498 fatal("%s: bad cipher name %s or pointer %p", __func__,
499 enc->name, enc->cipher);
502 if (cipher_authlen(enc->cipher) == 0) {
503 mac->name = buffer_get_string(&b, NULL);
504 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
505 fatal("%s: can not setup mac %s", __func__, mac->name);
506 mac->enabled = buffer_get_int(&b);
507 mac->key = buffer_get_string(&b, &len);
508 if (len > mac->key_len)
509 fatal("%s: bad mac key length: %u > %d", __func__, len,
515 comp->type = buffer_get_int(&b);
516 comp->enabled = buffer_get_int(&b);
517 comp->name = buffer_get_string(&b, NULL);
519 len = buffer_len(&b);
521 error("newkeys_from_blob: remaining bytes in blob %u", len);
527 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
534 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
536 debug3("%s: converting %p", __func__, newkey);
538 if (newkey == NULL) {
539 error("%s: newkey == NULL", __func__);
544 comp = &newkey->comp;
548 buffer_put_cstring(&b, enc->name);
549 /* The cipher struct is constant and shared, you export pointer */
550 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
551 buffer_put_int(&b, enc->enabled);
552 buffer_put_int(&b, enc->block_size);
553 buffer_put_string(&b, enc->key, enc->key_len);
554 packet_get_keyiv(mode, enc->iv, enc->iv_len);
555 buffer_put_string(&b, enc->iv, enc->iv_len);
558 if (cipher_authlen(enc->cipher) == 0) {
559 buffer_put_cstring(&b, mac->name);
560 buffer_put_int(&b, mac->enabled);
561 buffer_put_string(&b, mac->key, mac->key_len);
565 buffer_put_int(&b, comp->type);
566 buffer_put_int(&b, comp->enabled);
567 buffer_put_cstring(&b, comp->name);
569 len = buffer_len(&b);
573 *blobp = xmalloc(len);
574 memcpy(*blobp, buffer_ptr(&b), len);
576 explicit_bzero(buffer_ptr(&b), len);
582 mm_send_kex(Buffer *m, Kex *kex)
584 buffer_put_string(m, kex->session_id, kex->session_id_len);
585 buffer_put_int(m, kex->we_need);
586 buffer_put_int(m, kex->hostkey_type);
587 buffer_put_int(m, kex->kex_type);
588 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
589 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
590 buffer_put_int(m, kex->flags);
591 buffer_put_cstring(m, kex->client_version_string);
592 buffer_put_cstring(m, kex->server_version_string);
596 mm_send_keystate(struct monitor *monitor)
598 Buffer m, *input, *output;
601 u_int32_t seqnr, packets;
602 u_int64_t blocks, bytes;
611 buffer_put_int(&m, packet_get_protocol_flags());
613 buffer_put_int(&m, packet_get_ssh1_cipher());
615 debug3("%s: Sending ssh1 KEY+IV", __func__);
616 keylen = packet_get_encryption_key(NULL);
617 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
618 keylen = packet_get_encryption_key(key);
619 buffer_put_string(&m, key, keylen);
620 explicit_bzero(key, keylen);
623 ivlen = packet_get_keyiv_len(MODE_OUT);
624 packet_get_keyiv(MODE_OUT, iv, ivlen);
625 buffer_put_string(&m, iv, ivlen);
626 ivlen = packet_get_keyiv_len(MODE_IN);
627 packet_get_keyiv(MODE_IN, iv, ivlen);
628 buffer_put_string(&m, iv, ivlen);
631 /* Kex for rekeying */
632 mm_send_kex(&m, *monitor->m_pkex);
635 debug3("%s: Sending new keys: %p %p",
636 __func__, packet_get_newkeys(MODE_OUT),
637 packet_get_newkeys(MODE_IN));
640 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
641 fatal("%s: conversion of newkeys failed", __func__);
643 buffer_put_string(&m, blob, bloblen);
646 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
647 fatal("%s: conversion of newkeys failed", __func__);
649 buffer_put_string(&m, blob, bloblen);
652 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
653 buffer_put_int(&m, seqnr);
654 buffer_put_int64(&m, blocks);
655 buffer_put_int(&m, packets);
656 buffer_put_int64(&m, bytes);
657 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
658 buffer_put_int(&m, seqnr);
659 buffer_put_int64(&m, blocks);
660 buffer_put_int(&m, packets);
661 buffer_put_int64(&m, bytes);
663 debug3("%s: New keys have been sent", __func__);
665 /* More key context */
666 plen = packet_get_keycontext(MODE_OUT, NULL);
668 packet_get_keycontext(MODE_OUT, p);
669 buffer_put_string(&m, p, plen);
672 plen = packet_get_keycontext(MODE_IN, NULL);
674 packet_get_keycontext(MODE_IN, p);
675 buffer_put_string(&m, p, plen);
678 /* Compression state */
679 debug3("%s: Sending compression state", __func__);
680 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
681 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
683 /* Network I/O buffers */
684 input = (Buffer *)packet_get_input();
685 output = (Buffer *)packet_get_output();
686 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
687 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
691 buffer_put_int64(&m, get_sent_bytes());
692 buffer_put_int64(&m, get_recv_bytes());
695 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
696 debug3("%s: Finished sending state", __func__);
702 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
706 int success = 0, tmp1 = -1, tmp2 = -1;
708 /* Kludge: ensure there are fds free to receive the pty/tty */
709 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
710 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
711 error("%s: cannot allocate fds for pty", __func__);
722 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
724 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
725 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
727 success = buffer_get_int(&m);
729 debug3("%s: pty alloc failed", __func__);
733 p = buffer_get_string(&m, NULL);
734 msg = buffer_get_string(&m, NULL);
737 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
740 buffer_append(&loginmsg, msg, strlen(msg));
743 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
744 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
745 fatal("%s: receive fds failed", __func__);
752 mm_session_pty_cleanup2(Session *s)
759 buffer_put_cstring(&m, s->tty);
760 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
763 /* closed dup'ed master */
764 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
765 error("close(s->ptymaster/%d): %s",
766 s->ptymaster, strerror(errno));
768 /* unlink pty from session */
774 mm_start_pam(Authctxt *authctxt)
778 debug3("%s entering", __func__);
779 if (!options.use_pam)
780 fatal("UsePAM=no, but ended up in %s anyway", __func__);
783 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
789 mm_do_pam_account(void)
795 debug3("%s entering", __func__);
796 if (!options.use_pam)
797 fatal("UsePAM=no, but ended up in %s anyway", __func__);
800 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
802 mm_request_receive_expect(pmonitor->m_recvfd,
803 MONITOR_ANS_PAM_ACCOUNT, &m);
804 ret = buffer_get_int(&m);
805 msg = buffer_get_string(&m, NULL);
806 buffer_append(&loginmsg, msg, strlen(msg));
811 debug3("%s returning %d", __func__, ret);
817 mm_sshpam_init_ctx(Authctxt *authctxt)
822 debug3("%s", __func__);
824 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
825 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
826 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
827 success = buffer_get_int(&m);
829 debug3("%s: pam_init_ctx failed", __func__);
838 mm_sshpam_query(void *ctx, char **name, char **info,
839 u_int *num, char ***prompts, u_int **echo_on)
845 debug3("%s", __func__);
847 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
848 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
849 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
850 ret = buffer_get_int(&m);
851 debug3("%s: pam_query returned %d", __func__, ret);
852 *name = buffer_get_string(&m, NULL);
853 *info = buffer_get_string(&m, NULL);
854 *num = buffer_get_int(&m);
855 if (*num > PAM_MAX_NUM_MSG)
856 fatal("%s: recieved %u PAM messages, expected <= %u",
857 __func__, *num, PAM_MAX_NUM_MSG);
858 *prompts = xcalloc((*num + 1), sizeof(char *));
859 *echo_on = xcalloc((*num + 1), sizeof(u_int));
860 for (i = 0; i < *num; ++i) {
861 (*prompts)[i] = buffer_get_string(&m, NULL);
862 (*echo_on)[i] = buffer_get_int(&m);
869 mm_sshpam_respond(void *ctx, u_int num, char **resp)
875 debug3("%s", __func__);
877 buffer_put_int(&m, num);
878 for (i = 0; i < num; ++i)
879 buffer_put_cstring(&m, resp[i]);
880 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
881 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
882 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
883 ret = buffer_get_int(&m);
884 debug3("%s: pam_respond returned %d", __func__, ret);
890 mm_sshpam_free_ctx(void *ctxtp)
894 debug3("%s", __func__);
896 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
897 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
898 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
903 /* Request process termination */
911 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
916 mm_ssh1_session_key(BIGNUM *num)
922 buffer_put_bignum2(&m, num);
923 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
925 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
927 rsafail = buffer_get_int(&m);
928 buffer_get_bignum2(&m, num);
936 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
937 char ***prompts, u_int **echo_on)
940 *infotxt = xstrdup("");
942 *prompts = xcalloc(*numprompts, sizeof(char *));
943 *echo_on = xcalloc(*numprompts, sizeof(u_int));
948 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
949 u_int *numprompts, char ***prompts, u_int **echo_on)
955 debug3("%s: entering", __func__);
958 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
960 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
962 success = buffer_get_int(&m);
964 debug3("%s: no challenge", __func__);
969 /* Get the challenge, and format the response */
970 challenge = buffer_get_string(&m, NULL);
973 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
974 (*prompts)[0] = challenge;
976 debug3("%s: received challenge: %s", __func__, challenge);
982 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
987 debug3("%s: entering", __func__);
988 if (numresponses != 1)
992 buffer_put_cstring(&m, responses[0]);
993 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
995 mm_request_receive_expect(pmonitor->m_recvfd,
996 MONITOR_ANS_BSDAUTHRESPOND, &m);
998 authok = buffer_get_int(&m);
1001 return ((authok == 0) ? -1 : 0);
1006 mm_skey_query(void *ctx, char **name, char **infotxt,
1007 u_int *numprompts, char ***prompts, u_int **echo_on)
1013 debug3("%s: entering", __func__);
1016 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
1018 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
1020 success = buffer_get_int(&m);
1022 debug3("%s: no challenge", __func__);
1027 /* Get the challenge, and format the response */
1028 challenge = buffer_get_string(&m, NULL);
1031 debug3("%s: received challenge: %s", __func__, challenge);
1033 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1035 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1042 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1047 debug3("%s: entering", __func__);
1048 if (numresponses != 1)
1052 buffer_put_cstring(&m, responses[0]);
1053 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1055 mm_request_receive_expect(pmonitor->m_recvfd,
1056 MONITOR_ANS_SKEYRESPOND, &m);
1058 authok = buffer_get_int(&m);
1061 return ((authok == 0) ? -1 : 0);
1066 mm_ssh1_session_id(u_char session_id[16])
1071 debug3("%s entering", __func__);
1074 for (i = 0; i < 16; i++)
1075 buffer_put_char(&m, session_id[i]);
1077 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1082 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1088 int allowed = 0, have_forced = 0;
1090 debug3("%s entering", __func__);
1093 buffer_put_bignum2(&m, client_n);
1095 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1096 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1098 allowed = buffer_get_int(&m);
1100 /* fake forced command */
1101 auth_clear_options();
1102 have_forced = buffer_get_int(&m);
1103 forced_command = have_forced ? xstrdup("true") : NULL;
1105 if (allowed && rkey != NULL) {
1106 blob = buffer_get_string(&m, &blen);
1107 if ((key = key_from_blob(blob, blen)) == NULL)
1108 fatal("%s: key_from_blob failed", __func__);
1118 mm_auth_rsa_generate_challenge(Key *key)
1125 debug3("%s entering", __func__);
1127 if ((challenge = BN_new()) == NULL)
1128 fatal("%s: BN_new failed", __func__);
1130 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1131 if (key_to_blob(key, &blob, &blen) == 0)
1132 fatal("%s: key_to_blob failed", __func__);
1133 key->type = KEY_RSA1;
1136 buffer_put_string(&m, blob, blen);
1139 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1140 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1142 buffer_get_bignum2(&m, challenge);
1149 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1156 debug3("%s entering", __func__);
1158 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1159 if (key_to_blob(key, &blob, &blen) == 0)
1160 fatal("%s: key_to_blob failed", __func__);
1161 key->type = KEY_RSA1;
1164 buffer_put_string(&m, blob, blen);
1165 buffer_put_string(&m, response, 16);
1168 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1169 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1171 success = buffer_get_int(&m);
1177 #ifdef SSH_AUDIT_EVENTS
1179 mm_audit_event(ssh_audit_event_t event)
1183 debug3("%s entering", __func__);
1186 buffer_put_int(&m, event);
1188 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1193 mm_audit_run_command(const char *command)
1197 debug3("%s entering command %s", __func__, command);
1200 buffer_put_cstring(&m, command);
1202 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1205 #endif /* SSH_AUDIT_EVENTS */
1209 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1214 /* Client doesn't get to see the context */
1218 buffer_put_string(&m, goid->elements, goid->length);
1220 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1221 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1223 major = buffer_get_int(&m);
1230 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1231 gss_buffer_desc *out, OM_uint32 *flags)
1238 buffer_put_string(&m, in->value, in->length);
1240 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1241 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1243 major = buffer_get_int(&m);
1244 out->value = buffer_get_string(&m, &len);
1247 *flags = buffer_get_int(&m);
1255 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1261 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1262 buffer_put_string(&m, gssmic->value, gssmic->length);
1264 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1265 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1268 major = buffer_get_int(&m);
1274 mm_ssh_gssapi_userok(char *user)
1277 int authenticated = 0;
1281 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1282 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1285 authenticated = buffer_get_int(&m);
1288 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1289 return (authenticated);