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 1.28 2003/07/22 13:35:22 markus Exp $");
30 #include <openssl/bn.h>
31 #include <openssl/dh.h>
37 #include "auth-options.h"
45 #include "monitor_wrap.h"
48 #include "monitor_fdpass.h"
58 extern Newkeys *newkeys[];
59 extern z_stream incoming_stream;
60 extern z_stream outgoing_stream;
61 extern struct monitor *pmonitor;
62 extern Buffer input, output;
63 extern ServerOptions options;
66 mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
68 u_int mlen = buffer_len(m);
71 debug3("%s entering: type %d", __func__, type);
73 PUT_32BIT(buf, mlen + 1);
74 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
75 if (atomicio(vwrite, socket, buf, sizeof(buf)) != sizeof(buf))
76 fatal("%s: write", __func__);
77 if (atomicio(vwrite, socket, buffer_ptr(m), mlen) != mlen)
78 fatal("%s: write", __func__);
82 mm_request_receive(int socket, Buffer *m)
88 debug3("%s entering", __func__);
90 res = atomicio(read, socket, buf, sizeof(buf));
91 if (res != sizeof(buf)) {
94 fatal("%s: read: %ld", __func__, (long)res);
96 msg_len = GET_32BIT(buf);
97 if (msg_len > 256 * 1024)
98 fatal("%s: read: bad msg_len %d", __func__, msg_len);
100 buffer_append_space(m, msg_len);
101 res = atomicio(read, socket, buffer_ptr(m), msg_len);
103 fatal("%s: read: %ld != msg_len", __func__, (long)res);
107 mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
111 debug3("%s entering: type %d", __func__, type);
113 mm_request_receive(socket, m);
114 rtype = buffer_get_char(m);
116 fatal("%s: read: rtype %d != type %d", __func__,
121 mm_choose_dh(int min, int nbits, int max)
128 buffer_put_int(&m, min);
129 buffer_put_int(&m, nbits);
130 buffer_put_int(&m, max);
132 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
134 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
135 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
137 success = buffer_get_char(&m);
139 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
141 if ((p = BN_new()) == NULL)
142 fatal("%s: BN_new failed", __func__);
143 if ((g = BN_new()) == NULL)
144 fatal("%s: BN_new failed", __func__);
145 buffer_get_bignum2(&m, p);
146 buffer_get_bignum2(&m, g);
148 debug3("%s: remaining %d", __func__, buffer_len(&m));
151 return (dh_new_group(g, p));
155 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
157 Kex *kex = *pmonitor->m_pkex;
160 debug3("%s entering", __func__);
163 buffer_put_int(&m, kex->host_key_index(key));
164 buffer_put_string(&m, data, datalen);
166 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
168 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
169 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
170 *sigp = buffer_get_string(&m, lenp);
177 mm_getpwnamallow(const char *login)
183 debug3("%s entering", __func__);
186 buffer_put_cstring(&m, login);
188 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
190 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
191 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
193 if (buffer_get_char(&m) == 0) {
197 pw = buffer_get_string(&m, &pwlen);
198 if (pwlen != sizeof(struct passwd))
199 fatal("%s: struct passwd size mismatch", __func__);
200 pw->pw_name = buffer_get_string(&m, NULL);
201 pw->pw_passwd = buffer_get_string(&m, NULL);
202 pw->pw_gecos = buffer_get_string(&m, NULL);
203 #ifdef HAVE_PW_CLASS_IN_PASSWD
204 pw->pw_class = buffer_get_string(&m, NULL);
206 pw->pw_dir = buffer_get_string(&m, NULL);
207 pw->pw_shell = buffer_get_string(&m, NULL);
213 char *mm_auth2_read_banner(void)
218 debug3("%s entering", __func__);
221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
224 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTH2_READ_BANNER, &m);
225 banner = buffer_get_string(&m, NULL);
231 /* Inform the privileged process about service and style */
234 mm_inform_authserv(char *service, char *style)
238 debug3("%s entering", __func__);
241 buffer_put_cstring(&m, service);
242 buffer_put_cstring(&m, style ? style : "");
244 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
249 /* Do the password authentication */
251 mm_auth_password(Authctxt *authctxt, char *password)
254 int authenticated = 0;
256 debug3("%s entering", __func__);
259 buffer_put_cstring(&m, password);
260 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
262 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
263 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
265 authenticated = buffer_get_int(&m);
269 debug3("%s: user %sauthenticated",
270 __func__, authenticated ? "" : "not ");
271 return (authenticated);
275 mm_user_key_allowed(struct passwd *pw, Key *key)
277 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
281 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
284 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
288 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
289 char *host, Key *key)
293 key->type = KEY_RSA; /* XXX hack for key_to_blob */
294 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
295 key->type = KEY_RSA1;
300 mm_send_debug(Buffer *m)
304 while (buffer_len(m)) {
305 msg = buffer_get_string(m, NULL);
306 debug3("%s: Sending debug: %s", __func__, msg);
307 packet_send_debug("%s", msg);
313 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
318 int allowed = 0, have_forced = 0;
320 debug3("%s entering", __func__);
322 /* Convert the key to a blob and the pass it over */
323 if (!key_to_blob(key, &blob, &len))
327 buffer_put_int(&m, type);
328 buffer_put_cstring(&m, user ? user : "");
329 buffer_put_cstring(&m, host ? host : "");
330 buffer_put_string(&m, blob, len);
333 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
335 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
336 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
338 allowed = buffer_get_int(&m);
340 /* fake forced command */
341 auth_clear_options();
342 have_forced = buffer_get_int(&m);
343 forced_command = have_forced ? xstrdup("true") : NULL;
345 /* Send potential debug messages */
354 * This key verify needs to send the key type along, because the
355 * privileged parent makes the decision if the key is allowed
356 * for authentication.
360 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
367 debug3("%s entering", __func__);
369 /* Convert the key to a blob and the pass it over */
370 if (!key_to_blob(key, &blob, &len))
374 buffer_put_string(&m, blob, len);
375 buffer_put_string(&m, sig, siglen);
376 buffer_put_string(&m, data, datalen);
379 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
381 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
382 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
384 verified = buffer_get_int(&m);
391 /* Export key state after authentication */
393 mm_newkeys_from_blob(u_char *blob, int blen)
397 Newkeys *newkey = NULL;
402 debug3("%s: %p(%d)", __func__, blob, blen);
404 dump_base64(stderr, blob, blen);
407 buffer_append(&b, blob, blen);
409 newkey = xmalloc(sizeof(*newkey));
412 comp = &newkey->comp;
415 enc->name = buffer_get_string(&b, NULL);
416 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
417 enc->enabled = buffer_get_int(&b);
418 enc->block_size = buffer_get_int(&b);
419 enc->key = buffer_get_string(&b, &enc->key_len);
420 enc->iv = buffer_get_string(&b, &len);
421 if (len != enc->block_size)
422 fatal("%s: bad ivlen: expected %u != %u", __func__,
423 enc->block_size, len);
425 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
426 fatal("%s: bad cipher name %s or pointer %p", __func__,
427 enc->name, enc->cipher);
430 mac->name = buffer_get_string(&b, NULL);
431 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
432 fatal("%s: can not init mac %s", __func__, mac->name);
433 mac->enabled = buffer_get_int(&b);
434 mac->key = buffer_get_string(&b, &len);
435 if (len > mac->key_len)
436 fatal("%s: bad mac key length: %u > %d", __func__, len,
441 comp->type = buffer_get_int(&b);
442 comp->enabled = buffer_get_int(&b);
443 comp->name = buffer_get_string(&b, NULL);
445 len = buffer_len(&b);
447 error("newkeys_from_blob: remaining bytes in blob %u", len);
453 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
460 Newkeys *newkey = newkeys[mode];
462 debug3("%s: converting %p", __func__, newkey);
464 if (newkey == NULL) {
465 error("%s: newkey == NULL", __func__);
470 comp = &newkey->comp;
474 buffer_put_cstring(&b, enc->name);
475 /* The cipher struct is constant and shared, you export pointer */
476 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
477 buffer_put_int(&b, enc->enabled);
478 buffer_put_int(&b, enc->block_size);
479 buffer_put_string(&b, enc->key, enc->key_len);
480 packet_get_keyiv(mode, enc->iv, enc->block_size);
481 buffer_put_string(&b, enc->iv, enc->block_size);
484 buffer_put_cstring(&b, mac->name);
485 buffer_put_int(&b, mac->enabled);
486 buffer_put_string(&b, mac->key, mac->key_len);
489 buffer_put_int(&b, comp->type);
490 buffer_put_int(&b, comp->enabled);
491 buffer_put_cstring(&b, comp->name);
493 len = buffer_len(&b);
497 *blobp = xmalloc(len);
498 memcpy(*blobp, buffer_ptr(&b), len);
500 memset(buffer_ptr(&b), 0, len);
506 mm_send_kex(Buffer *m, Kex *kex)
508 buffer_put_string(m, kex->session_id, kex->session_id_len);
509 buffer_put_int(m, kex->we_need);
510 buffer_put_int(m, kex->hostkey_type);
511 buffer_put_int(m, kex->kex_type);
512 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
513 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
514 buffer_put_int(m, kex->flags);
515 buffer_put_cstring(m, kex->client_version_string);
516 buffer_put_cstring(m, kex->server_version_string);
520 mm_send_keystate(struct monitor *pmonitor)
525 u_int32_t seqnr, packets;
535 buffer_put_int(&m, packet_get_protocol_flags());
537 buffer_put_int(&m, packet_get_ssh1_cipher());
539 debug3("%s: Sending ssh1 KEY+IV", __func__);
540 keylen = packet_get_encryption_key(NULL);
541 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
542 keylen = packet_get_encryption_key(key);
543 buffer_put_string(&m, key, keylen);
544 memset(key, 0, keylen);
547 ivlen = packet_get_keyiv_len(MODE_OUT);
548 packet_get_keyiv(MODE_OUT, iv, ivlen);
549 buffer_put_string(&m, iv, ivlen);
550 ivlen = packet_get_keyiv_len(MODE_OUT);
551 packet_get_keyiv(MODE_IN, iv, ivlen);
552 buffer_put_string(&m, iv, ivlen);
555 /* Kex for rekeying */
556 mm_send_kex(&m, *pmonitor->m_pkex);
559 debug3("%s: Sending new keys: %p %p",
560 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
563 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
564 fatal("%s: conversion of newkeys failed", __func__);
566 buffer_put_string(&m, blob, bloblen);
569 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
570 fatal("%s: conversion of newkeys failed", __func__);
572 buffer_put_string(&m, blob, bloblen);
575 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
576 buffer_put_int(&m, seqnr);
577 buffer_put_int64(&m, blocks);
578 buffer_put_int(&m, packets);
579 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
580 buffer_put_int(&m, seqnr);
581 buffer_put_int64(&m, blocks);
582 buffer_put_int(&m, packets);
584 debug3("%s: New keys have been sent", __func__);
586 /* More key context */
587 plen = packet_get_keycontext(MODE_OUT, NULL);
589 packet_get_keycontext(MODE_OUT, p);
590 buffer_put_string(&m, p, plen);
593 plen = packet_get_keycontext(MODE_IN, NULL);
595 packet_get_keycontext(MODE_IN, p);
596 buffer_put_string(&m, p, plen);
599 /* Compression state */
600 debug3("%s: Sending compression state", __func__);
601 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
602 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
604 /* Network I/O buffers */
605 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
606 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
608 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
609 debug3("%s: Finished sending state", __func__);
615 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
622 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
624 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
625 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
627 success = buffer_get_int(&m);
629 debug3("%s: pty alloc failed", __func__);
633 p = buffer_get_string(&m, NULL);
636 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
639 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
640 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
647 mm_session_pty_cleanup2(void *session)
649 Session *s = session;
655 buffer_put_cstring(&m, s->tty);
656 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
659 /* closed dup'ed master */
660 if (close(s->ptymaster) < 0)
661 error("close(s->ptymaster): %s", strerror(errno));
663 /* unlink pty from session */
669 mm_start_pam(char *user)
673 debug3("%s entering", __func__);
674 if (!options.use_pam)
675 fatal("UsePAM=no, but ended up in %s anyway", __func__);
678 buffer_put_cstring(&m, user);
680 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
686 mm_do_pam_account(void)
691 debug3("%s entering", __func__);
692 if (!options.use_pam)
693 fatal("UsePAM=no, but ended up in %s anyway", __func__);
696 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
698 mm_request_receive_expect(pmonitor->m_recvfd,
699 MONITOR_ANS_PAM_ACCOUNT, &m);
700 ret = buffer_get_int(&m);
704 debug3("%s returning %d", __func__, ret);
710 mm_sshpam_init_ctx(Authctxt *authctxt)
715 debug3("%s", __func__);
717 buffer_put_cstring(&m, authctxt->user);
718 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
719 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
720 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
721 success = buffer_get_int(&m);
723 debug3("%s: pam_init_ctx failed", __func__);
732 mm_sshpam_query(void *ctx, char **name, char **info,
733 u_int *num, char ***prompts, u_int **echo_on)
738 debug3("%s", __func__);
740 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
741 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
742 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
743 ret = buffer_get_int(&m);
744 debug3("%s: pam_query returned %d", __func__, ret);
745 *name = buffer_get_string(&m, NULL);
746 *info = buffer_get_string(&m, NULL);
747 *num = buffer_get_int(&m);
748 *prompts = xmalloc((*num + 1) * sizeof(char *));
749 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
750 for (i = 0; i < *num; ++i) {
751 (*prompts)[i] = buffer_get_string(&m, NULL);
752 (*echo_on)[i] = buffer_get_int(&m);
759 mm_sshpam_respond(void *ctx, u_int num, char **resp)
764 debug3("%s", __func__);
766 buffer_put_int(&m, num);
767 for (i = 0; i < num; ++i)
768 buffer_put_cstring(&m, resp[i]);
769 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
770 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
771 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
772 ret = buffer_get_int(&m);
773 debug3("%s: pam_respond returned %d", __func__, ret);
779 mm_sshpam_free_ctx(void *ctxtp)
783 debug3("%s", __func__);
785 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
786 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
787 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
792 /* Request process termination */
800 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
805 mm_ssh1_session_key(BIGNUM *num)
811 buffer_put_bignum2(&m, num);
812 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
814 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
816 rsafail = buffer_get_int(&m);
817 buffer_get_bignum2(&m, num);
825 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
826 char ***prompts, u_int **echo_on)
829 *infotxt = xstrdup("");
831 *prompts = xmalloc(*numprompts * sizeof(char *));
832 *echo_on = xmalloc(*numprompts * sizeof(u_int));
837 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
838 u_int *numprompts, char ***prompts, u_int **echo_on)
844 debug3("%s: entering", __func__);
847 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
849 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
851 success = buffer_get_int(&m);
853 debug3("%s: no challenge", __func__);
858 /* Get the challenge, and format the response */
859 challenge = buffer_get_string(&m, NULL);
862 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
863 (*prompts)[0] = challenge;
865 debug3("%s: received challenge: %s", __func__, challenge);
871 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
876 debug3("%s: entering", __func__);
877 if (numresponses != 1)
881 buffer_put_cstring(&m, responses[0]);
882 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
884 mm_request_receive_expect(pmonitor->m_recvfd,
885 MONITOR_ANS_BSDAUTHRESPOND, &m);
887 authok = buffer_get_int(&m);
890 return ((authok == 0) ? -1 : 0);
894 mm_skey_query(void *ctx, char **name, char **infotxt,
895 u_int *numprompts, char ***prompts, u_int **echo_on)
902 debug3("%s: entering", __func__);
905 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
907 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
909 success = buffer_get_int(&m);
911 debug3("%s: no challenge", __func__);
916 /* Get the challenge, and format the response */
917 challenge = buffer_get_string(&m, NULL);
920 debug3("%s: received challenge: %s", __func__, challenge);
922 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
924 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
926 strlcpy(p, challenge, len);
927 strlcat(p, SKEY_PROMPT, len);
935 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
940 debug3("%s: entering", __func__);
941 if (numresponses != 1)
945 buffer_put_cstring(&m, responses[0]);
946 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
948 mm_request_receive_expect(pmonitor->m_recvfd,
949 MONITOR_ANS_SKEYRESPOND, &m);
951 authok = buffer_get_int(&m);
954 return ((authok == 0) ? -1 : 0);
958 mm_ssh1_session_id(u_char session_id[16])
963 debug3("%s entering", __func__);
966 for (i = 0; i < 16; i++)
967 buffer_put_char(&m, session_id[i]);
969 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
974 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
980 int allowed = 0, have_forced = 0;
982 debug3("%s entering", __func__);
985 buffer_put_bignum2(&m, client_n);
987 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
988 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
990 allowed = buffer_get_int(&m);
992 /* fake forced command */
993 auth_clear_options();
994 have_forced = buffer_get_int(&m);
995 forced_command = have_forced ? xstrdup("true") : NULL;
997 if (allowed && rkey != NULL) {
998 blob = buffer_get_string(&m, &blen);
999 if ((key = key_from_blob(blob, blen)) == NULL)
1000 fatal("%s: key_from_blob failed", __func__);
1011 mm_auth_rsa_generate_challenge(Key *key)
1018 debug3("%s entering", __func__);
1020 if ((challenge = BN_new()) == NULL)
1021 fatal("%s: BN_new failed", __func__);
1023 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1024 if (key_to_blob(key, &blob, &blen) == 0)
1025 fatal("%s: key_to_blob failed", __func__);
1026 key->type = KEY_RSA1;
1029 buffer_put_string(&m, blob, blen);
1032 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1033 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1035 buffer_get_bignum2(&m, challenge);
1042 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1049 debug3("%s entering", __func__);
1051 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1052 if (key_to_blob(key, &blob, &blen) == 0)
1053 fatal("%s: key_to_blob failed", __func__);
1054 key->type = KEY_RSA1;
1057 buffer_put_string(&m, blob, blen);
1058 buffer_put_string(&m, response, 16);
1061 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1062 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1064 success = buffer_get_int(&m);
1072 mm_auth_krb5(void *ctx, void *argp, char **userp, void *resp)
1074 krb5_data *tkt, *reply;
1078 debug3("%s entering", __func__);
1079 tkt = (krb5_data *) argp;
1080 reply = (krb5_data *) resp;
1083 buffer_put_string(&m, tkt->data, tkt->length);
1085 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB5, &m);
1086 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB5, &m);
1088 success = buffer_get_int(&m);
1092 *userp = buffer_get_string(&m, NULL);
1093 reply->data = buffer_get_string(&m, &len);
1094 reply->length = len;
1096 memset(reply, 0, sizeof(*reply));