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 1.39 2004/07/17 05:31:41 dtucker Exp $");
31 #include <openssl/bn.h>
32 #include <openssl/dh.h>
38 #include "auth-options.h"
44 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
47 #define TARGET_OS_MAC 1
52 #include "monitor_wrap.h"
55 #include "monitor_fdpass.h"
69 extern Newkeys *newkeys[];
70 extern z_stream incoming_stream;
71 extern z_stream outgoing_stream;
72 extern struct monitor *pmonitor;
73 extern Buffer input, output;
74 extern Buffer loginmsg;
75 extern ServerOptions options;
81 * m_pid is only set in the privileged part, and
82 * points to the unprivileged child.
84 return (pmonitor && pmonitor->m_pid > 0);
88 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
90 u_int mlen = buffer_len(m);
93 debug3("%s entering: type %d", __func__, type);
95 PUT_32BIT(buf, mlen + 1);
96 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
97 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
98 fatal("%s: write", __func__);
99 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
100 fatal("%s: write", __func__);
104 mm_request_receive(int sock, Buffer *m)
110 debug3("%s entering", __func__);
112 res = atomicio(read, sock, buf, sizeof(buf));
113 if (res != sizeof(buf)) {
116 fatal("%s: read: %ld", __func__, (long)res);
118 msg_len = GET_32BIT(buf);
119 if (msg_len > 256 * 1024)
120 fatal("%s: read: bad msg_len %d", __func__, msg_len);
122 buffer_append_space(m, msg_len);
123 res = atomicio(read, sock, buffer_ptr(m), msg_len);
125 fatal("%s: read: %ld != msg_len", __func__, (long)res);
129 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
133 debug3("%s entering: type %d", __func__, type);
135 mm_request_receive(sock, m);
136 rtype = buffer_get_char(m);
138 fatal("%s: read: rtype %d != type %d", __func__,
143 mm_choose_dh(int min, int nbits, int max)
150 buffer_put_int(&m, min);
151 buffer_put_int(&m, nbits);
152 buffer_put_int(&m, max);
154 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
156 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
157 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
159 success = buffer_get_char(&m);
161 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
163 if ((p = BN_new()) == NULL)
164 fatal("%s: BN_new failed", __func__);
165 if ((g = BN_new()) == NULL)
166 fatal("%s: BN_new failed", __func__);
167 buffer_get_bignum2(&m, p);
168 buffer_get_bignum2(&m, g);
170 debug3("%s: remaining %d", __func__, buffer_len(&m));
173 return (dh_new_group(g, p));
177 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
179 Kex *kex = *pmonitor->m_pkex;
182 debug3("%s entering", __func__);
185 buffer_put_int(&m, kex->host_key_index(key));
186 buffer_put_string(&m, data, datalen);
188 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
190 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
191 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
192 *sigp = buffer_get_string(&m, lenp);
199 mm_getpwnamallow(const char *username)
205 debug3("%s entering", __func__);
208 buffer_put_cstring(&m, username);
210 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
212 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
213 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
215 if (buffer_get_char(&m) == 0) {
219 pw = buffer_get_string(&m, &pwlen);
220 if (pwlen != sizeof(struct passwd))
221 fatal("%s: struct passwd size mismatch", __func__);
222 pw->pw_name = buffer_get_string(&m, NULL);
223 pw->pw_passwd = buffer_get_string(&m, NULL);
224 pw->pw_gecos = buffer_get_string(&m, NULL);
225 #ifdef HAVE_PW_CLASS_IN_PASSWD
226 pw->pw_class = buffer_get_string(&m, NULL);
228 pw->pw_dir = buffer_get_string(&m, NULL);
229 pw->pw_shell = buffer_get_string(&m, NULL);
236 mm_auth2_read_banner(void)
241 debug3("%s entering", __func__);
244 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
247 mm_request_receive_expect(pmonitor->m_recvfd,
248 MONITOR_ANS_AUTH2_READ_BANNER, &m);
249 banner = buffer_get_string(&m, NULL);
252 /* treat empty banner as missing banner */
253 if (strlen(banner) == 0) {
260 /* Inform the privileged process about service and style */
263 mm_inform_authserv(char *service, char *style)
267 debug3("%s entering", __func__);
270 buffer_put_cstring(&m, service);
271 buffer_put_cstring(&m, style ? style : "");
273 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
278 /* Do the password authentication */
280 mm_auth_password(Authctxt *authctxt, char *password)
283 int authenticated = 0;
285 debug3("%s entering", __func__);
288 buffer_put_cstring(&m, password);
289 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
291 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
292 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
294 authenticated = buffer_get_int(&m);
298 debug3("%s: user %sauthenticated",
299 __func__, authenticated ? "" : "not ");
300 return (authenticated);
304 mm_user_key_allowed(struct passwd *pw, Key *key)
306 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
310 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
313 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
317 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
318 char *host, Key *key)
322 key->type = KEY_RSA; /* XXX hack for key_to_blob */
323 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
324 key->type = KEY_RSA1;
329 mm_send_debug(Buffer *m)
333 while (buffer_len(m)) {
334 msg = buffer_get_string(m, NULL);
335 debug3("%s: Sending debug: %s", __func__, msg);
336 packet_send_debug("%s", msg);
342 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
347 int allowed = 0, have_forced = 0;
349 debug3("%s entering", __func__);
351 /* Convert the key to a blob and the pass it over */
352 if (!key_to_blob(key, &blob, &len))
356 buffer_put_int(&m, type);
357 buffer_put_cstring(&m, user ? user : "");
358 buffer_put_cstring(&m, host ? host : "");
359 buffer_put_string(&m, blob, len);
362 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
364 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
365 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
367 allowed = buffer_get_int(&m);
369 /* fake forced command */
370 auth_clear_options();
371 have_forced = buffer_get_int(&m);
372 forced_command = have_forced ? xstrdup("true") : NULL;
374 /* Send potential debug messages */
383 * This key verify needs to send the key type along, because the
384 * privileged parent makes the decision if the key is allowed
385 * for authentication.
389 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
396 debug3("%s entering", __func__);
398 /* Convert the key to a blob and the pass it over */
399 if (!key_to_blob(key, &blob, &len))
403 buffer_put_string(&m, blob, len);
404 buffer_put_string(&m, sig, siglen);
405 buffer_put_string(&m, data, datalen);
408 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
410 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
411 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
413 verified = buffer_get_int(&m);
420 /* Export key state after authentication */
422 mm_newkeys_from_blob(u_char *blob, int blen)
426 Newkeys *newkey = NULL;
431 debug3("%s: %p(%d)", __func__, blob, blen);
433 dump_base64(stderr, blob, blen);
436 buffer_append(&b, blob, blen);
438 newkey = xmalloc(sizeof(*newkey));
441 comp = &newkey->comp;
444 enc->name = buffer_get_string(&b, NULL);
445 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
446 enc->enabled = buffer_get_int(&b);
447 enc->block_size = buffer_get_int(&b);
448 enc->key = buffer_get_string(&b, &enc->key_len);
449 enc->iv = buffer_get_string(&b, &len);
450 if (len != enc->block_size)
451 fatal("%s: bad ivlen: expected %u != %u", __func__,
452 enc->block_size, len);
454 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
455 fatal("%s: bad cipher name %s or pointer %p", __func__,
456 enc->name, enc->cipher);
459 mac->name = buffer_get_string(&b, NULL);
460 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
461 fatal("%s: can not init mac %s", __func__, mac->name);
462 mac->enabled = buffer_get_int(&b);
463 mac->key = buffer_get_string(&b, &len);
464 if (len > mac->key_len)
465 fatal("%s: bad mac key length: %u > %d", __func__, len,
470 comp->type = buffer_get_int(&b);
471 comp->enabled = buffer_get_int(&b);
472 comp->name = buffer_get_string(&b, NULL);
474 len = buffer_len(&b);
476 error("newkeys_from_blob: remaining bytes in blob %u", len);
482 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
489 Newkeys *newkey = newkeys[mode];
491 debug3("%s: converting %p", __func__, newkey);
493 if (newkey == NULL) {
494 error("%s: newkey == NULL", __func__);
499 comp = &newkey->comp;
503 buffer_put_cstring(&b, enc->name);
504 /* The cipher struct is constant and shared, you export pointer */
505 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
506 buffer_put_int(&b, enc->enabled);
507 buffer_put_int(&b, enc->block_size);
508 buffer_put_string(&b, enc->key, enc->key_len);
509 packet_get_keyiv(mode, enc->iv, enc->block_size);
510 buffer_put_string(&b, enc->iv, enc->block_size);
513 buffer_put_cstring(&b, mac->name);
514 buffer_put_int(&b, mac->enabled);
515 buffer_put_string(&b, mac->key, mac->key_len);
518 buffer_put_int(&b, comp->type);
519 buffer_put_int(&b, comp->enabled);
520 buffer_put_cstring(&b, comp->name);
522 len = buffer_len(&b);
526 *blobp = xmalloc(len);
527 memcpy(*blobp, buffer_ptr(&b), len);
529 memset(buffer_ptr(&b), 0, len);
535 mm_send_kex(Buffer *m, Kex *kex)
537 buffer_put_string(m, kex->session_id, kex->session_id_len);
538 buffer_put_int(m, kex->we_need);
539 buffer_put_int(m, kex->hostkey_type);
540 buffer_put_int(m, kex->kex_type);
541 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
542 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
543 buffer_put_int(m, kex->flags);
544 buffer_put_cstring(m, kex->client_version_string);
545 buffer_put_cstring(m, kex->server_version_string);
549 mm_send_keystate(struct monitor *monitor)
554 u_int32_t seqnr, packets;
564 buffer_put_int(&m, packet_get_protocol_flags());
566 buffer_put_int(&m, packet_get_ssh1_cipher());
568 debug3("%s: Sending ssh1 KEY+IV", __func__);
569 keylen = packet_get_encryption_key(NULL);
570 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
571 keylen = packet_get_encryption_key(key);
572 buffer_put_string(&m, key, keylen);
573 memset(key, 0, keylen);
576 ivlen = packet_get_keyiv_len(MODE_OUT);
577 packet_get_keyiv(MODE_OUT, iv, ivlen);
578 buffer_put_string(&m, iv, ivlen);
579 ivlen = packet_get_keyiv_len(MODE_OUT);
580 packet_get_keyiv(MODE_IN, iv, ivlen);
581 buffer_put_string(&m, iv, ivlen);
584 /* Kex for rekeying */
585 mm_send_kex(&m, *monitor->m_pkex);
588 debug3("%s: Sending new keys: %p %p",
589 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
592 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
593 fatal("%s: conversion of newkeys failed", __func__);
595 buffer_put_string(&m, blob, bloblen);
598 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
599 fatal("%s: conversion of newkeys failed", __func__);
601 buffer_put_string(&m, blob, bloblen);
604 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
605 buffer_put_int(&m, seqnr);
606 buffer_put_int64(&m, blocks);
607 buffer_put_int(&m, packets);
608 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
609 buffer_put_int(&m, seqnr);
610 buffer_put_int64(&m, blocks);
611 buffer_put_int(&m, packets);
613 debug3("%s: New keys have been sent", __func__);
615 /* More key context */
616 plen = packet_get_keycontext(MODE_OUT, NULL);
618 packet_get_keycontext(MODE_OUT, p);
619 buffer_put_string(&m, p, plen);
622 plen = packet_get_keycontext(MODE_IN, NULL);
624 packet_get_keycontext(MODE_IN, p);
625 buffer_put_string(&m, p, plen);
628 /* Compression state */
629 debug3("%s: Sending compression state", __func__);
630 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
631 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
633 /* Network I/O buffers */
634 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
635 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
637 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
638 debug3("%s: Finished sending state", __func__);
644 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
651 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
653 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
654 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
656 success = buffer_get_int(&m);
658 debug3("%s: pty alloc failed", __func__);
662 p = buffer_get_string(&m, NULL);
663 msg = buffer_get_string(&m, NULL);
666 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
669 buffer_append(&loginmsg, msg, strlen(msg));
672 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
673 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
680 mm_session_pty_cleanup2(Session *s)
687 buffer_put_cstring(&m, s->tty);
688 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
691 /* closed dup'ed master */
692 if (close(s->ptymaster) < 0)
693 error("close(s->ptymaster): %s", strerror(errno));
695 /* unlink pty from session */
701 mm_start_pam(Authctxt *authctxt)
705 debug3("%s entering", __func__);
706 if (!options.use_pam)
707 fatal("UsePAM=no, but ended up in %s anyway", __func__);
710 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
716 mm_do_pam_account(void)
721 debug3("%s entering", __func__);
722 if (!options.use_pam)
723 fatal("UsePAM=no, but ended up in %s anyway", __func__);
726 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
728 mm_request_receive_expect(pmonitor->m_recvfd,
729 MONITOR_ANS_PAM_ACCOUNT, &m);
730 ret = buffer_get_int(&m);
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)
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)
794 debug3("%s", __func__);
796 buffer_put_int(&m, num);
797 for (i = 0; i < num; ++i)
798 buffer_put_cstring(&m, resp[i]);
799 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
800 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
801 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
802 ret = buffer_get_int(&m);
803 debug3("%s: pam_respond returned %d", __func__, ret);
809 mm_sshpam_free_ctx(void *ctxtp)
813 debug3("%s", __func__);
815 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
816 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
817 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
822 /* Request process termination */
830 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
835 mm_ssh1_session_key(BIGNUM *num)
841 buffer_put_bignum2(&m, num);
842 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
844 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
846 rsafail = buffer_get_int(&m);
847 buffer_get_bignum2(&m, num);
855 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
856 char ***prompts, u_int **echo_on)
859 *infotxt = xstrdup("");
861 *prompts = xmalloc(*numprompts * sizeof(char *));
862 *echo_on = xmalloc(*numprompts * sizeof(u_int));
867 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
868 u_int *numprompts, char ***prompts, u_int **echo_on)
874 debug3("%s: entering", __func__);
877 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
879 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
881 success = buffer_get_int(&m);
883 debug3("%s: no challenge", __func__);
888 /* Get the challenge, and format the response */
889 challenge = buffer_get_string(&m, NULL);
892 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
893 (*prompts)[0] = challenge;
895 debug3("%s: received challenge: %s", __func__, challenge);
901 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
906 debug3("%s: entering", __func__);
907 if (numresponses != 1)
911 buffer_put_cstring(&m, responses[0]);
912 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
914 mm_request_receive_expect(pmonitor->m_recvfd,
915 MONITOR_ANS_BSDAUTHRESPOND, &m);
917 authok = buffer_get_int(&m);
920 return ((authok == 0) ? -1 : 0);
925 mm_skey_query(void *ctx, char **name, char **infotxt,
926 u_int *numprompts, char ***prompts, u_int **echo_on)
933 debug3("%s: entering", __func__);
936 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
938 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
940 success = buffer_get_int(&m);
942 debug3("%s: no challenge", __func__);
947 /* Get the challenge, and format the response */
948 challenge = buffer_get_string(&m, NULL);
951 debug3("%s: received challenge: %s", __func__, challenge);
953 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
955 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
957 strlcpy(p, challenge, len);
958 strlcat(p, SKEY_PROMPT, len);
966 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
971 debug3("%s: entering", __func__);
972 if (numresponses != 1)
976 buffer_put_cstring(&m, responses[0]);
977 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
979 mm_request_receive_expect(pmonitor->m_recvfd,
980 MONITOR_ANS_SKEYRESPOND, &m);
982 authok = buffer_get_int(&m);
985 return ((authok == 0) ? -1 : 0);
990 mm_ssh1_session_id(u_char session_id[16])
995 debug3("%s entering", __func__);
998 for (i = 0; i < 16; i++)
999 buffer_put_char(&m, session_id[i]);
1001 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1006 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1012 int allowed = 0, have_forced = 0;
1014 debug3("%s entering", __func__);
1017 buffer_put_bignum2(&m, client_n);
1019 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1020 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1022 allowed = buffer_get_int(&m);
1024 /* fake forced command */
1025 auth_clear_options();
1026 have_forced = buffer_get_int(&m);
1027 forced_command = have_forced ? xstrdup("true") : NULL;
1029 if (allowed && rkey != NULL) {
1030 blob = buffer_get_string(&m, &blen);
1031 if ((key = key_from_blob(blob, blen)) == NULL)
1032 fatal("%s: key_from_blob failed", __func__);
1043 mm_auth_rsa_generate_challenge(Key *key)
1050 debug3("%s entering", __func__);
1052 if ((challenge = BN_new()) == NULL)
1053 fatal("%s: BN_new failed", __func__);
1055 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1056 if (key_to_blob(key, &blob, &blen) == 0)
1057 fatal("%s: key_to_blob failed", __func__);
1058 key->type = KEY_RSA1;
1061 buffer_put_string(&m, blob, blen);
1064 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1065 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1067 buffer_get_bignum2(&m, challenge);
1074 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1081 debug3("%s entering", __func__);
1083 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1084 if (key_to_blob(key, &blob, &blen) == 0)
1085 fatal("%s: key_to_blob failed", __func__);
1086 key->type = KEY_RSA1;
1089 buffer_put_string(&m, blob, blen);
1090 buffer_put_string(&m, response, 16);
1093 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1094 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1096 success = buffer_get_int(&m);
1104 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1109 /* Client doesn't get to see the context */
1113 buffer_put_string(&m, goid->elements, goid->length);
1115 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1116 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1118 major = buffer_get_int(&m);
1125 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1126 gss_buffer_desc *out, OM_uint32 *flags)
1133 buffer_put_string(&m, in->value, in->length);
1135 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1136 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1138 major = buffer_get_int(&m);
1139 out->value = buffer_get_string(&m, &len);
1142 *flags = buffer_get_int(&m);
1150 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1156 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1157 buffer_put_string(&m, gssmic->value, gssmic->length);
1159 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1160 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1163 major = buffer_get_int(&m);
1169 mm_ssh_gssapi_userok(char *user)
1172 int authenticated = 0;
1176 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1177 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1180 authenticated = buffer_get_int(&m);
1183 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1184 return (authenticated);