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.
29 #include <openssl/bn.h>
30 #include <openssl/dh.h>
36 #include "auth-options.h"
42 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
45 #define TARGET_OS_MAC 1
50 #include "monitor_wrap.h"
53 #include "monitor_fdpass.h"
67 extern Newkeys *newkeys[];
68 extern z_stream incoming_stream;
69 extern z_stream outgoing_stream;
70 extern struct monitor *pmonitor;
71 extern Buffer input, output;
72 extern Buffer loginmsg;
73 extern ServerOptions options;
79 * m_pid is only set in the privileged part, and
80 * points to the unprivileged child.
82 return (pmonitor && pmonitor->m_pid > 0);
86 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
88 u_int mlen = buffer_len(m);
91 debug3("%s entering: type %d", __func__, type);
93 PUT_32BIT(buf, mlen + 1);
94 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
95 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
96 fatal("%s: write: %s", __func__, strerror(errno));
97 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
98 fatal("%s: write: %s", __func__, strerror(errno));
102 mm_request_receive(int sock, Buffer *m)
107 debug3("%s entering", __func__);
109 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
112 fatal("%s: read: %s", __func__, strerror(errno));
114 msg_len = GET_32BIT(buf);
115 if (msg_len > 256 * 1024)
116 fatal("%s: read: bad msg_len %d", __func__, msg_len);
118 buffer_append_space(m, msg_len);
119 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
120 fatal("%s: read: %s", __func__, strerror(errno));
124 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
128 debug3("%s entering: type %d", __func__, type);
130 mm_request_receive(sock, m);
131 rtype = buffer_get_char(m);
133 fatal("%s: read: rtype %d != type %d", __func__,
138 mm_choose_dh(int min, int nbits, int max)
145 buffer_put_int(&m, min);
146 buffer_put_int(&m, nbits);
147 buffer_put_int(&m, max);
149 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
151 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
152 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
154 success = buffer_get_char(&m);
156 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
158 if ((p = BN_new()) == NULL)
159 fatal("%s: BN_new failed", __func__);
160 if ((g = BN_new()) == NULL)
161 fatal("%s: BN_new failed", __func__);
162 buffer_get_bignum2(&m, p);
163 buffer_get_bignum2(&m, g);
165 debug3("%s: remaining %d", __func__, buffer_len(&m));
168 return (dh_new_group(g, p));
172 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
174 Kex *kex = *pmonitor->m_pkex;
177 debug3("%s entering", __func__);
180 buffer_put_int(&m, kex->host_key_index(key));
181 buffer_put_string(&m, data, datalen);
183 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
185 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
186 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
187 *sigp = buffer_get_string(&m, lenp);
194 mm_getpwnamallow(const char *username)
200 debug3("%s entering", __func__);
203 buffer_put_cstring(&m, username);
205 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
207 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
208 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
210 if (buffer_get_char(&m) == 0) {
214 pw = buffer_get_string(&m, &pwlen);
215 if (pwlen != sizeof(struct passwd))
216 fatal("%s: struct passwd size mismatch", __func__);
217 pw->pw_name = buffer_get_string(&m, NULL);
218 pw->pw_passwd = buffer_get_string(&m, NULL);
219 pw->pw_gecos = buffer_get_string(&m, NULL);
220 #ifdef HAVE_PW_CLASS_IN_PASSWD
221 pw->pw_class = buffer_get_string(&m, NULL);
223 pw->pw_dir = buffer_get_string(&m, NULL);
224 pw->pw_shell = buffer_get_string(&m, NULL);
231 mm_auth2_read_banner(void)
236 debug3("%s entering", __func__);
239 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
242 mm_request_receive_expect(pmonitor->m_recvfd,
243 MONITOR_ANS_AUTH2_READ_BANNER, &m);
244 banner = buffer_get_string(&m, NULL);
247 /* treat empty banner as missing banner */
248 if (strlen(banner) == 0) {
255 /* Inform the privileged process about service and style */
258 mm_inform_authserv(char *service, char *style)
262 debug3("%s entering", __func__);
265 buffer_put_cstring(&m, service);
266 buffer_put_cstring(&m, style ? style : "");
268 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
273 /* Do the password authentication */
275 mm_auth_password(Authctxt *authctxt, char *password)
278 int authenticated = 0;
280 debug3("%s entering", __func__);
283 buffer_put_cstring(&m, password);
284 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
286 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
287 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
289 authenticated = buffer_get_int(&m);
293 debug3("%s: user %sauthenticated",
294 __func__, authenticated ? "" : "not ");
295 return (authenticated);
299 mm_user_key_allowed(struct passwd *pw, Key *key)
301 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
305 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
308 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
312 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
313 char *host, Key *key)
317 key->type = KEY_RSA; /* XXX hack for key_to_blob */
318 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
319 key->type = KEY_RSA1;
324 mm_send_debug(Buffer *m)
328 while (buffer_len(m)) {
329 msg = buffer_get_string(m, NULL);
330 debug3("%s: Sending debug: %s", __func__, msg);
331 packet_send_debug("%s", msg);
337 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
342 int allowed = 0, have_forced = 0;
344 debug3("%s entering", __func__);
346 /* Convert the key to a blob and the pass it over */
347 if (!key_to_blob(key, &blob, &len))
351 buffer_put_int(&m, type);
352 buffer_put_cstring(&m, user ? user : "");
353 buffer_put_cstring(&m, host ? host : "");
354 buffer_put_string(&m, blob, len);
357 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
359 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
360 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
362 allowed = buffer_get_int(&m);
364 /* fake forced command */
365 auth_clear_options();
366 have_forced = buffer_get_int(&m);
367 forced_command = have_forced ? xstrdup("true") : NULL;
369 /* Send potential debug messages */
378 * This key verify needs to send the key type along, because the
379 * privileged parent makes the decision if the key is allowed
380 * for authentication.
384 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
391 debug3("%s entering", __func__);
393 /* Convert the key to a blob and the pass it over */
394 if (!key_to_blob(key, &blob, &len))
398 buffer_put_string(&m, blob, len);
399 buffer_put_string(&m, sig, siglen);
400 buffer_put_string(&m, data, datalen);
403 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
405 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
406 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
408 verified = buffer_get_int(&m);
415 /* Export key state after authentication */
417 mm_newkeys_from_blob(u_char *blob, int blen)
421 Newkeys *newkey = NULL;
426 debug3("%s: %p(%d)", __func__, blob, blen);
428 dump_base64(stderr, blob, blen);
431 buffer_append(&b, blob, blen);
433 newkey = xmalloc(sizeof(*newkey));
436 comp = &newkey->comp;
439 enc->name = buffer_get_string(&b, NULL);
440 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
441 enc->enabled = buffer_get_int(&b);
442 enc->block_size = buffer_get_int(&b);
443 enc->key = buffer_get_string(&b, &enc->key_len);
444 enc->iv = buffer_get_string(&b, &len);
445 if (len != enc->block_size)
446 fatal("%s: bad ivlen: expected %u != %u", __func__,
447 enc->block_size, len);
449 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
450 fatal("%s: bad cipher name %s or pointer %p", __func__,
451 enc->name, enc->cipher);
454 mac->name = buffer_get_string(&b, NULL);
455 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
456 fatal("%s: can not init mac %s", __func__, mac->name);
457 mac->enabled = buffer_get_int(&b);
458 mac->key = buffer_get_string(&b, &len);
459 if (len > mac->key_len)
460 fatal("%s: bad mac key length: %u > %d", __func__, len,
465 comp->type = buffer_get_int(&b);
466 comp->enabled = buffer_get_int(&b);
467 comp->name = buffer_get_string(&b, NULL);
469 len = buffer_len(&b);
471 error("newkeys_from_blob: remaining bytes in blob %u", len);
477 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
484 Newkeys *newkey = newkeys[mode];
486 debug3("%s: converting %p", __func__, newkey);
488 if (newkey == NULL) {
489 error("%s: newkey == NULL", __func__);
494 comp = &newkey->comp;
498 buffer_put_cstring(&b, enc->name);
499 /* The cipher struct is constant and shared, you export pointer */
500 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
501 buffer_put_int(&b, enc->enabled);
502 buffer_put_int(&b, enc->block_size);
503 buffer_put_string(&b, enc->key, enc->key_len);
504 packet_get_keyiv(mode, enc->iv, enc->block_size);
505 buffer_put_string(&b, enc->iv, enc->block_size);
508 buffer_put_cstring(&b, mac->name);
509 buffer_put_int(&b, mac->enabled);
510 buffer_put_string(&b, mac->key, mac->key_len);
513 buffer_put_int(&b, comp->type);
514 buffer_put_int(&b, comp->enabled);
515 buffer_put_cstring(&b, comp->name);
517 len = buffer_len(&b);
521 *blobp = xmalloc(len);
522 memcpy(*blobp, buffer_ptr(&b), len);
524 memset(buffer_ptr(&b), 0, len);
530 mm_send_kex(Buffer *m, Kex *kex)
532 buffer_put_string(m, kex->session_id, kex->session_id_len);
533 buffer_put_int(m, kex->we_need);
534 buffer_put_int(m, kex->hostkey_type);
535 buffer_put_int(m, kex->kex_type);
536 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
537 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
538 buffer_put_int(m, kex->flags);
539 buffer_put_cstring(m, kex->client_version_string);
540 buffer_put_cstring(m, kex->server_version_string);
544 mm_send_keystate(struct monitor *monitor)
549 u_int32_t seqnr, packets;
559 buffer_put_int(&m, packet_get_protocol_flags());
561 buffer_put_int(&m, packet_get_ssh1_cipher());
563 debug3("%s: Sending ssh1 KEY+IV", __func__);
564 keylen = packet_get_encryption_key(NULL);
565 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
566 keylen = packet_get_encryption_key(key);
567 buffer_put_string(&m, key, keylen);
568 memset(key, 0, keylen);
571 ivlen = packet_get_keyiv_len(MODE_OUT);
572 packet_get_keyiv(MODE_OUT, iv, ivlen);
573 buffer_put_string(&m, iv, ivlen);
574 ivlen = packet_get_keyiv_len(MODE_OUT);
575 packet_get_keyiv(MODE_IN, iv, ivlen);
576 buffer_put_string(&m, iv, ivlen);
579 /* Kex for rekeying */
580 mm_send_kex(&m, *monitor->m_pkex);
583 debug3("%s: Sending new keys: %p %p",
584 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
587 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
588 fatal("%s: conversion of newkeys failed", __func__);
590 buffer_put_string(&m, blob, bloblen);
593 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
594 fatal("%s: conversion of newkeys failed", __func__);
596 buffer_put_string(&m, blob, bloblen);
599 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
600 buffer_put_int(&m, seqnr);
601 buffer_put_int64(&m, blocks);
602 buffer_put_int(&m, packets);
603 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
604 buffer_put_int(&m, seqnr);
605 buffer_put_int64(&m, blocks);
606 buffer_put_int(&m, packets);
608 debug3("%s: New keys have been sent", __func__);
610 /* More key context */
611 plen = packet_get_keycontext(MODE_OUT, NULL);
613 packet_get_keycontext(MODE_OUT, p);
614 buffer_put_string(&m, p, plen);
617 plen = packet_get_keycontext(MODE_IN, NULL);
619 packet_get_keycontext(MODE_IN, p);
620 buffer_put_string(&m, p, plen);
623 /* Compression state */
624 debug3("%s: Sending compression state", __func__);
625 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
626 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
628 /* Network I/O buffers */
629 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
630 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
632 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
633 debug3("%s: Finished sending state", __func__);
639 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
646 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
648 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
649 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
651 success = buffer_get_int(&m);
653 debug3("%s: pty alloc failed", __func__);
657 p = buffer_get_string(&m, NULL);
658 msg = buffer_get_string(&m, NULL);
661 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
664 buffer_append(&loginmsg, msg, strlen(msg));
667 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
668 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
675 mm_session_pty_cleanup2(Session *s)
682 buffer_put_cstring(&m, s->tty);
683 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
686 /* closed dup'ed master */
687 if (close(s->ptymaster) < 0)
688 error("close(s->ptymaster): %s", strerror(errno));
690 /* unlink pty from session */
696 mm_start_pam(Authctxt *authctxt)
700 debug3("%s entering", __func__);
701 if (!options.use_pam)
702 fatal("UsePAM=no, but ended up in %s anyway", __func__);
705 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
711 mm_do_pam_account(void)
717 debug3("%s entering", __func__);
718 if (!options.use_pam)
719 fatal("UsePAM=no, but ended up in %s anyway", __func__);
722 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
724 mm_request_receive_expect(pmonitor->m_recvfd,
725 MONITOR_ANS_PAM_ACCOUNT, &m);
726 ret = buffer_get_int(&m);
727 msg = buffer_get_string(&m, NULL);
728 buffer_append(&loginmsg, msg, strlen(msg));
733 debug3("%s returning %d", __func__, ret);
739 mm_sshpam_init_ctx(Authctxt *authctxt)
744 debug3("%s", __func__);
746 buffer_put_cstring(&m, authctxt->user);
747 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
748 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
749 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
750 success = buffer_get_int(&m);
752 debug3("%s: pam_init_ctx failed", __func__);
761 mm_sshpam_query(void *ctx, char **name, char **info,
762 u_int *num, char ***prompts, u_int **echo_on)
768 debug3("%s", __func__);
770 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
771 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
772 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
773 ret = buffer_get_int(&m);
774 debug3("%s: pam_query returned %d", __func__, ret);
775 *name = buffer_get_string(&m, NULL);
776 *info = buffer_get_string(&m, NULL);
777 *num = buffer_get_int(&m);
778 *prompts = xmalloc((*num + 1) * sizeof(char *));
779 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
780 for (i = 0; i < *num; ++i) {
781 (*prompts)[i] = buffer_get_string(&m, NULL);
782 (*echo_on)[i] = buffer_get_int(&m);
789 mm_sshpam_respond(void *ctx, u_int num, char **resp)
795 debug3("%s", __func__);
797 buffer_put_int(&m, num);
798 for (i = 0; i < num; ++i)
799 buffer_put_cstring(&m, resp[i]);
800 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
801 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
802 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
803 ret = buffer_get_int(&m);
804 debug3("%s: pam_respond returned %d", __func__, ret);
810 mm_sshpam_free_ctx(void *ctxtp)
814 debug3("%s", __func__);
816 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
817 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
818 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
823 /* Request process termination */
831 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
836 mm_ssh1_session_key(BIGNUM *num)
842 buffer_put_bignum2(&m, num);
843 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
845 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
847 rsafail = buffer_get_int(&m);
848 buffer_get_bignum2(&m, num);
856 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
857 char ***prompts, u_int **echo_on)
860 *infotxt = xstrdup("");
862 *prompts = xmalloc(*numprompts * sizeof(char *));
863 *echo_on = xmalloc(*numprompts * sizeof(u_int));
868 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
869 u_int *numprompts, char ***prompts, u_int **echo_on)
875 debug3("%s: entering", __func__);
878 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
880 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
882 success = buffer_get_int(&m);
884 debug3("%s: no challenge", __func__);
889 /* Get the challenge, and format the response */
890 challenge = buffer_get_string(&m, NULL);
893 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
894 (*prompts)[0] = challenge;
896 debug3("%s: received challenge: %s", __func__, challenge);
902 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
907 debug3("%s: entering", __func__);
908 if (numresponses != 1)
912 buffer_put_cstring(&m, responses[0]);
913 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
915 mm_request_receive_expect(pmonitor->m_recvfd,
916 MONITOR_ANS_BSDAUTHRESPOND, &m);
918 authok = buffer_get_int(&m);
921 return ((authok == 0) ? -1 : 0);
926 mm_skey_query(void *ctx, char **name, char **infotxt,
927 u_int *numprompts, char ***prompts, u_int **echo_on)
934 debug3("%s: entering", __func__);
937 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
939 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
941 success = buffer_get_int(&m);
943 debug3("%s: no challenge", __func__);
948 /* Get the challenge, and format the response */
949 challenge = buffer_get_string(&m, NULL);
952 debug3("%s: received challenge: %s", __func__, challenge);
954 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
956 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
958 strlcpy(p, challenge, len);
959 strlcat(p, SKEY_PROMPT, len);
967 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
972 debug3("%s: entering", __func__);
973 if (numresponses != 1)
977 buffer_put_cstring(&m, responses[0]);
978 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
980 mm_request_receive_expect(pmonitor->m_recvfd,
981 MONITOR_ANS_SKEYRESPOND, &m);
983 authok = buffer_get_int(&m);
986 return ((authok == 0) ? -1 : 0);
991 mm_ssh1_session_id(u_char session_id[16])
996 debug3("%s entering", __func__);
999 for (i = 0; i < 16; i++)
1000 buffer_put_char(&m, session_id[i]);
1002 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1007 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1013 int allowed = 0, have_forced = 0;
1015 debug3("%s entering", __func__);
1018 buffer_put_bignum2(&m, client_n);
1020 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1021 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1023 allowed = buffer_get_int(&m);
1025 /* fake forced command */
1026 auth_clear_options();
1027 have_forced = buffer_get_int(&m);
1028 forced_command = have_forced ? xstrdup("true") : NULL;
1030 if (allowed && rkey != NULL) {
1031 blob = buffer_get_string(&m, &blen);
1032 if ((key = key_from_blob(blob, blen)) == NULL)
1033 fatal("%s: key_from_blob failed", __func__);
1044 mm_auth_rsa_generate_challenge(Key *key)
1051 debug3("%s entering", __func__);
1053 if ((challenge = BN_new()) == NULL)
1054 fatal("%s: BN_new failed", __func__);
1056 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1057 if (key_to_blob(key, &blob, &blen) == 0)
1058 fatal("%s: key_to_blob failed", __func__);
1059 key->type = KEY_RSA1;
1062 buffer_put_string(&m, blob, blen);
1065 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1066 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1068 buffer_get_bignum2(&m, challenge);
1075 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1082 debug3("%s entering", __func__);
1084 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1085 if (key_to_blob(key, &blob, &blen) == 0)
1086 fatal("%s: key_to_blob failed", __func__);
1087 key->type = KEY_RSA1;
1090 buffer_put_string(&m, blob, blen);
1091 buffer_put_string(&m, response, 16);
1094 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1095 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1097 success = buffer_get_int(&m);
1103 #ifdef SSH_AUDIT_EVENTS
1105 mm_audit_event(ssh_audit_event_t event)
1109 debug3("%s entering", __func__);
1112 buffer_put_int(&m, event);
1114 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1119 mm_audit_run_command(const char *command)
1123 debug3("%s entering command %s", __func__, command);
1126 buffer_put_cstring(&m, command);
1128 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1131 #endif /* SSH_AUDIT_EVENTS */
1135 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1140 /* Client doesn't get to see the context */
1144 buffer_put_string(&m, goid->elements, goid->length);
1146 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1147 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1149 major = buffer_get_int(&m);
1156 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1157 gss_buffer_desc *out, OM_uint32 *flags)
1164 buffer_put_string(&m, in->value, in->length);
1166 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1167 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1169 major = buffer_get_int(&m);
1170 out->value = buffer_get_string(&m, &len);
1173 *flags = buffer_get_int(&m);
1181 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1187 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1188 buffer_put_string(&m, gssmic->value, gssmic->length);
1190 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1191 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1194 major = buffer_get_int(&m);
1200 mm_ssh_gssapi_userok(char *user)
1203 int authenticated = 0;
1207 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1208 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1211 authenticated = buffer_get_int(&m);
1214 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1215 return (authenticated);