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 1.29 2003/08/22 10:56:09 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"
62 extern Newkeys *newkeys[];
63 extern z_stream incoming_stream;
64 extern z_stream outgoing_stream;
65 extern struct monitor *pmonitor;
66 extern Buffer input, output;
67 extern ServerOptions options;
70 mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
72 u_int mlen = buffer_len(m);
75 debug3("%s entering: type %d", __func__, type);
77 PUT_32BIT(buf, mlen + 1);
78 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
79 if (atomicio(vwrite, socket, buf, sizeof(buf)) != sizeof(buf))
80 fatal("%s: write", __func__);
81 if (atomicio(vwrite, socket, buffer_ptr(m), mlen) != mlen)
82 fatal("%s: write", __func__);
86 mm_request_receive(int socket, Buffer *m)
92 debug3("%s entering", __func__);
94 res = atomicio(read, socket, buf, sizeof(buf));
95 if (res != sizeof(buf)) {
98 fatal("%s: read: %ld", __func__, (long)res);
100 msg_len = GET_32BIT(buf);
101 if (msg_len > 256 * 1024)
102 fatal("%s: read: bad msg_len %d", __func__, msg_len);
104 buffer_append_space(m, msg_len);
105 res = atomicio(read, socket, buffer_ptr(m), msg_len);
107 fatal("%s: read: %ld != msg_len", __func__, (long)res);
111 mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
115 debug3("%s entering: type %d", __func__, type);
117 mm_request_receive(socket, m);
118 rtype = buffer_get_char(m);
120 fatal("%s: read: rtype %d != type %d", __func__,
125 mm_choose_dh(int min, int nbits, int max)
132 buffer_put_int(&m, min);
133 buffer_put_int(&m, nbits);
134 buffer_put_int(&m, max);
136 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
138 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
139 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
141 success = buffer_get_char(&m);
143 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
145 if ((p = BN_new()) == NULL)
146 fatal("%s: BN_new failed", __func__);
147 if ((g = BN_new()) == NULL)
148 fatal("%s: BN_new failed", __func__);
149 buffer_get_bignum2(&m, p);
150 buffer_get_bignum2(&m, g);
152 debug3("%s: remaining %d", __func__, buffer_len(&m));
155 return (dh_new_group(g, p));
159 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
161 Kex *kex = *pmonitor->m_pkex;
164 debug3("%s entering", __func__);
167 buffer_put_int(&m, kex->host_key_index(key));
168 buffer_put_string(&m, data, datalen);
170 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
172 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
173 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
174 *sigp = buffer_get_string(&m, lenp);
181 mm_getpwnamallow(const char *login)
187 debug3("%s entering", __func__);
190 buffer_put_cstring(&m, login);
192 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
194 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
195 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
197 if (buffer_get_char(&m) == 0) {
201 pw = buffer_get_string(&m, &pwlen);
202 if (pwlen != sizeof(struct passwd))
203 fatal("%s: struct passwd size mismatch", __func__);
204 pw->pw_name = buffer_get_string(&m, NULL);
205 pw->pw_passwd = buffer_get_string(&m, NULL);
206 pw->pw_gecos = buffer_get_string(&m, NULL);
207 #ifdef HAVE_PW_CLASS_IN_PASSWD
208 pw->pw_class = buffer_get_string(&m, NULL);
210 pw->pw_dir = buffer_get_string(&m, NULL);
211 pw->pw_shell = buffer_get_string(&m, NULL);
217 char *mm_auth2_read_banner(void)
222 debug3("%s entering", __func__);
225 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
228 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTH2_READ_BANNER, &m);
229 banner = buffer_get_string(&m, NULL);
235 /* Inform the privileged process about service and style */
238 mm_inform_authserv(char *service, char *style)
242 debug3("%s entering", __func__);
245 buffer_put_cstring(&m, service);
246 buffer_put_cstring(&m, style ? style : "");
248 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
253 /* Do the password authentication */
255 mm_auth_password(Authctxt *authctxt, char *password)
258 int authenticated = 0;
260 debug3("%s entering", __func__);
263 buffer_put_cstring(&m, password);
264 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
266 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
267 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
269 authenticated = buffer_get_int(&m);
273 debug3("%s: user %sauthenticated",
274 __func__, authenticated ? "" : "not ");
275 return (authenticated);
279 mm_user_key_allowed(struct passwd *pw, Key *key)
281 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
285 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
288 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
292 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
293 char *host, Key *key)
297 key->type = KEY_RSA; /* XXX hack for key_to_blob */
298 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
299 key->type = KEY_RSA1;
304 mm_send_debug(Buffer *m)
308 while (buffer_len(m)) {
309 msg = buffer_get_string(m, NULL);
310 debug3("%s: Sending debug: %s", __func__, msg);
311 packet_send_debug("%s", msg);
317 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
322 int allowed = 0, have_forced = 0;
324 debug3("%s entering", __func__);
326 /* Convert the key to a blob and the pass it over */
327 if (!key_to_blob(key, &blob, &len))
331 buffer_put_int(&m, type);
332 buffer_put_cstring(&m, user ? user : "");
333 buffer_put_cstring(&m, host ? host : "");
334 buffer_put_string(&m, blob, len);
337 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
339 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
340 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
342 allowed = buffer_get_int(&m);
344 /* fake forced command */
345 auth_clear_options();
346 have_forced = buffer_get_int(&m);
347 forced_command = have_forced ? xstrdup("true") : NULL;
349 /* Send potential debug messages */
358 * This key verify needs to send the key type along, because the
359 * privileged parent makes the decision if the key is allowed
360 * for authentication.
364 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
371 debug3("%s entering", __func__);
373 /* Convert the key to a blob and the pass it over */
374 if (!key_to_blob(key, &blob, &len))
378 buffer_put_string(&m, blob, len);
379 buffer_put_string(&m, sig, siglen);
380 buffer_put_string(&m, data, datalen);
383 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
385 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
386 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
388 verified = buffer_get_int(&m);
395 /* Export key state after authentication */
397 mm_newkeys_from_blob(u_char *blob, int blen)
401 Newkeys *newkey = NULL;
406 debug3("%s: %p(%d)", __func__, blob, blen);
408 dump_base64(stderr, blob, blen);
411 buffer_append(&b, blob, blen);
413 newkey = xmalloc(sizeof(*newkey));
416 comp = &newkey->comp;
419 enc->name = buffer_get_string(&b, NULL);
420 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
421 enc->enabled = buffer_get_int(&b);
422 enc->block_size = buffer_get_int(&b);
423 enc->key = buffer_get_string(&b, &enc->key_len);
424 enc->iv = buffer_get_string(&b, &len);
425 if (len != enc->block_size)
426 fatal("%s: bad ivlen: expected %u != %u", __func__,
427 enc->block_size, len);
429 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
430 fatal("%s: bad cipher name %s or pointer %p", __func__,
431 enc->name, enc->cipher);
434 mac->name = buffer_get_string(&b, NULL);
435 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
436 fatal("%s: can not init mac %s", __func__, mac->name);
437 mac->enabled = buffer_get_int(&b);
438 mac->key = buffer_get_string(&b, &len);
439 if (len > mac->key_len)
440 fatal("%s: bad mac key length: %u > %d", __func__, len,
445 comp->type = buffer_get_int(&b);
446 comp->enabled = buffer_get_int(&b);
447 comp->name = buffer_get_string(&b, NULL);
449 len = buffer_len(&b);
451 error("newkeys_from_blob: remaining bytes in blob %u", len);
457 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
464 Newkeys *newkey = newkeys[mode];
466 debug3("%s: converting %p", __func__, newkey);
468 if (newkey == NULL) {
469 error("%s: newkey == NULL", __func__);
474 comp = &newkey->comp;
478 buffer_put_cstring(&b, enc->name);
479 /* The cipher struct is constant and shared, you export pointer */
480 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
481 buffer_put_int(&b, enc->enabled);
482 buffer_put_int(&b, enc->block_size);
483 buffer_put_string(&b, enc->key, enc->key_len);
484 packet_get_keyiv(mode, enc->iv, enc->block_size);
485 buffer_put_string(&b, enc->iv, enc->block_size);
488 buffer_put_cstring(&b, mac->name);
489 buffer_put_int(&b, mac->enabled);
490 buffer_put_string(&b, mac->key, mac->key_len);
493 buffer_put_int(&b, comp->type);
494 buffer_put_int(&b, comp->enabled);
495 buffer_put_cstring(&b, comp->name);
497 len = buffer_len(&b);
501 *blobp = xmalloc(len);
502 memcpy(*blobp, buffer_ptr(&b), len);
504 memset(buffer_ptr(&b), 0, len);
510 mm_send_kex(Buffer *m, Kex *kex)
512 buffer_put_string(m, kex->session_id, kex->session_id_len);
513 buffer_put_int(m, kex->we_need);
514 buffer_put_int(m, kex->hostkey_type);
515 buffer_put_int(m, kex->kex_type);
516 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
517 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
518 buffer_put_int(m, kex->flags);
519 buffer_put_cstring(m, kex->client_version_string);
520 buffer_put_cstring(m, kex->server_version_string);
524 mm_send_keystate(struct monitor *pmonitor)
529 u_int32_t seqnr, packets;
539 buffer_put_int(&m, packet_get_protocol_flags());
541 buffer_put_int(&m, packet_get_ssh1_cipher());
543 debug3("%s: Sending ssh1 KEY+IV", __func__);
544 keylen = packet_get_encryption_key(NULL);
545 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
546 keylen = packet_get_encryption_key(key);
547 buffer_put_string(&m, key, keylen);
548 memset(key, 0, keylen);
551 ivlen = packet_get_keyiv_len(MODE_OUT);
552 packet_get_keyiv(MODE_OUT, iv, ivlen);
553 buffer_put_string(&m, iv, ivlen);
554 ivlen = packet_get_keyiv_len(MODE_OUT);
555 packet_get_keyiv(MODE_IN, iv, ivlen);
556 buffer_put_string(&m, iv, ivlen);
559 /* Kex for rekeying */
560 mm_send_kex(&m, *pmonitor->m_pkex);
563 debug3("%s: Sending new keys: %p %p",
564 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
567 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
568 fatal("%s: conversion of newkeys failed", __func__);
570 buffer_put_string(&m, blob, bloblen);
573 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
574 fatal("%s: conversion of newkeys failed", __func__);
576 buffer_put_string(&m, blob, bloblen);
579 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
580 buffer_put_int(&m, seqnr);
581 buffer_put_int64(&m, blocks);
582 buffer_put_int(&m, packets);
583 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
584 buffer_put_int(&m, seqnr);
585 buffer_put_int64(&m, blocks);
586 buffer_put_int(&m, packets);
588 debug3("%s: New keys have been sent", __func__);
590 /* More key context */
591 plen = packet_get_keycontext(MODE_OUT, NULL);
593 packet_get_keycontext(MODE_OUT, p);
594 buffer_put_string(&m, p, plen);
597 plen = packet_get_keycontext(MODE_IN, NULL);
599 packet_get_keycontext(MODE_IN, p);
600 buffer_put_string(&m, p, plen);
603 /* Compression state */
604 debug3("%s: Sending compression state", __func__);
605 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
606 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
608 /* Network I/O buffers */
609 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
610 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
612 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
613 debug3("%s: Finished sending state", __func__);
619 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
626 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
628 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
629 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
631 success = buffer_get_int(&m);
633 debug3("%s: pty alloc failed", __func__);
637 p = buffer_get_string(&m, NULL);
640 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
643 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
644 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
651 mm_session_pty_cleanup2(void *session)
653 Session *s = session;
659 buffer_put_cstring(&m, s->tty);
660 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
663 /* closed dup'ed master */
664 if (close(s->ptymaster) < 0)
665 error("close(s->ptymaster): %s", strerror(errno));
667 /* unlink pty from session */
673 mm_start_pam(char *user)
677 debug3("%s entering", __func__);
678 if (!options.use_pam)
679 fatal("UsePAM=no, but ended up in %s anyway", __func__);
682 buffer_put_cstring(&m, user);
684 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
690 mm_do_pam_account(void)
695 debug3("%s entering", __func__);
696 if (!options.use_pam)
697 fatal("UsePAM=no, but ended up in %s anyway", __func__);
700 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
702 mm_request_receive_expect(pmonitor->m_recvfd,
703 MONITOR_ANS_PAM_ACCOUNT, &m);
704 ret = buffer_get_int(&m);
708 debug3("%s returning %d", __func__, ret);
714 mm_sshpam_init_ctx(Authctxt *authctxt)
719 debug3("%s", __func__);
721 buffer_put_cstring(&m, authctxt->user);
722 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
723 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
724 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
725 success = buffer_get_int(&m);
727 debug3("%s: pam_init_ctx failed", __func__);
736 mm_sshpam_query(void *ctx, char **name, char **info,
737 u_int *num, char ***prompts, u_int **echo_on)
742 debug3("%s", __func__);
744 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
745 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
746 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
747 ret = buffer_get_int(&m);
748 debug3("%s: pam_query returned %d", __func__, ret);
749 *name = buffer_get_string(&m, NULL);
750 *info = buffer_get_string(&m, NULL);
751 *num = buffer_get_int(&m);
752 *prompts = xmalloc((*num + 1) * sizeof(char *));
753 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
754 for (i = 0; i < *num; ++i) {
755 (*prompts)[i] = buffer_get_string(&m, NULL);
756 (*echo_on)[i] = buffer_get_int(&m);
763 mm_sshpam_respond(void *ctx, u_int num, char **resp)
768 debug3("%s", __func__);
770 buffer_put_int(&m, num);
771 for (i = 0; i < num; ++i)
772 buffer_put_cstring(&m, resp[i]);
773 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
774 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
775 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
776 ret = buffer_get_int(&m);
777 debug3("%s: pam_respond returned %d", __func__, ret);
783 mm_sshpam_free_ctx(void *ctxtp)
787 debug3("%s", __func__);
789 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
790 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
791 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
796 /* Request process termination */
804 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
809 mm_ssh1_session_key(BIGNUM *num)
815 buffer_put_bignum2(&m, num);
816 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
818 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
820 rsafail = buffer_get_int(&m);
821 buffer_get_bignum2(&m, num);
829 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
830 char ***prompts, u_int **echo_on)
833 *infotxt = xstrdup("");
835 *prompts = xmalloc(*numprompts * sizeof(char *));
836 *echo_on = xmalloc(*numprompts * sizeof(u_int));
841 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
842 u_int *numprompts, char ***prompts, u_int **echo_on)
848 debug3("%s: entering", __func__);
851 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
853 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
855 success = buffer_get_int(&m);
857 debug3("%s: no challenge", __func__);
862 /* Get the challenge, and format the response */
863 challenge = buffer_get_string(&m, NULL);
866 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
867 (*prompts)[0] = challenge;
869 debug3("%s: received challenge: %s", __func__, challenge);
875 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
880 debug3("%s: entering", __func__);
881 if (numresponses != 1)
885 buffer_put_cstring(&m, responses[0]);
886 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
888 mm_request_receive_expect(pmonitor->m_recvfd,
889 MONITOR_ANS_BSDAUTHRESPOND, &m);
891 authok = buffer_get_int(&m);
894 return ((authok == 0) ? -1 : 0);
898 mm_skey_query(void *ctx, char **name, char **infotxt,
899 u_int *numprompts, char ***prompts, u_int **echo_on)
906 debug3("%s: entering", __func__);
909 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
911 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
913 success = buffer_get_int(&m);
915 debug3("%s: no challenge", __func__);
920 /* Get the challenge, and format the response */
921 challenge = buffer_get_string(&m, NULL);
924 debug3("%s: received challenge: %s", __func__, challenge);
926 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
928 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
930 strlcpy(p, challenge, len);
931 strlcat(p, SKEY_PROMPT, len);
939 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
944 debug3("%s: entering", __func__);
945 if (numresponses != 1)
949 buffer_put_cstring(&m, responses[0]);
950 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
952 mm_request_receive_expect(pmonitor->m_recvfd,
953 MONITOR_ANS_SKEYRESPOND, &m);
955 authok = buffer_get_int(&m);
958 return ((authok == 0) ? -1 : 0);
962 mm_ssh1_session_id(u_char session_id[16])
967 debug3("%s entering", __func__);
970 for (i = 0; i < 16; i++)
971 buffer_put_char(&m, session_id[i]);
973 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
978 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
984 int allowed = 0, have_forced = 0;
986 debug3("%s entering", __func__);
989 buffer_put_bignum2(&m, client_n);
991 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
992 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
994 allowed = buffer_get_int(&m);
996 /* fake forced command */
997 auth_clear_options();
998 have_forced = buffer_get_int(&m);
999 forced_command = have_forced ? xstrdup("true") : NULL;
1001 if (allowed && rkey != NULL) {
1002 blob = buffer_get_string(&m, &blen);
1003 if ((key = key_from_blob(blob, blen)) == NULL)
1004 fatal("%s: key_from_blob failed", __func__);
1015 mm_auth_rsa_generate_challenge(Key *key)
1022 debug3("%s entering", __func__);
1024 if ((challenge = BN_new()) == NULL)
1025 fatal("%s: BN_new failed", __func__);
1027 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1028 if (key_to_blob(key, &blob, &blen) == 0)
1029 fatal("%s: key_to_blob failed", __func__);
1030 key->type = KEY_RSA1;
1033 buffer_put_string(&m, blob, blen);
1036 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1037 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1039 buffer_get_bignum2(&m, challenge);
1046 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1053 debug3("%s entering", __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);
1062 buffer_put_string(&m, response, 16);
1065 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1066 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1068 success = buffer_get_int(&m);
1076 mm_auth_krb5(void *ctx, void *argp, char **userp, void *resp)
1078 krb5_data *tkt, *reply;
1082 debug3("%s entering", __func__);
1083 tkt = (krb5_data *) argp;
1084 reply = (krb5_data *) resp;
1087 buffer_put_string(&m, tkt->data, tkt->length);
1089 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB5, &m);
1090 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB5, &m);
1092 success = buffer_get_int(&m);
1096 *userp = buffer_get_string(&m, NULL);
1097 reply->data = buffer_get_string(&m, &len);
1098 reply->length = len;
1100 memset(reply, 0, sizeof(*reply));
1111 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid)
1116 /* Client doesn't get to see the context */
1120 buffer_put_string(&m, oid->elements, oid->length);
1122 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1123 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1125 major = buffer_get_int(&m);
1132 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1133 gss_buffer_desc *out, OM_uint32 *flags)
1139 buffer_put_string(&m, in->value, in->length);
1141 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1142 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1144 major = buffer_get_int(&m);
1145 out->value = buffer_get_string(&m, &out->length);
1147 *flags = buffer_get_int(&m);
1155 mm_ssh_gssapi_userok(char *user)
1158 int authenticated = 0;
1162 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1163 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1166 authenticated = buffer_get_int(&m);
1169 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1170 return (authenticated);