1 /* $OpenBSD: monitor_wrap.c,v 1.68 2009/06/22 05:39:28 dtucker Exp $ */
3 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
4 * Copyright 2002 Markus Friedl <markus@openbsd.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 #include <sys/types.h>
41 #include <openssl/bn.h>
42 #include <openssl/dh.h>
43 #include <openssl/evp.h>
45 #include "openbsd-compat/sys-queue.h"
55 #include "auth-options.h"
59 #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
62 #define TARGET_OS_MAC 1
70 #include "monitor_wrap.h"
72 #include "monitor_fdpass.h"
84 extern z_stream incoming_stream;
85 extern z_stream outgoing_stream;
86 extern struct monitor *pmonitor;
87 extern Buffer loginmsg;
88 extern ServerOptions options;
94 * m_pid is only set in the privileged part, and
95 * points to the unprivileged child.
97 return (pmonitor && pmonitor->m_pid > 0);
101 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
103 u_int mlen = buffer_len(m);
106 debug3("%s entering: type %d", __func__, type);
108 put_u32(buf, mlen + 1);
109 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
110 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
111 fatal("%s: write: %s", __func__, strerror(errno));
112 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
113 fatal("%s: write: %s", __func__, strerror(errno));
117 mm_request_receive(int sock, Buffer *m)
122 debug3("%s entering", __func__);
124 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
127 fatal("%s: read: %s", __func__, strerror(errno));
129 msg_len = get_u32(buf);
130 if (msg_len > 256 * 1024)
131 fatal("%s: read: bad msg_len %d", __func__, msg_len);
133 buffer_append_space(m, msg_len);
134 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
135 fatal("%s: read: %s", __func__, strerror(errno));
139 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
143 debug3("%s entering: type %d", __func__, type);
145 mm_request_receive(sock, m);
146 rtype = buffer_get_char(m);
148 fatal("%s: read: rtype %d != type %d", __func__,
153 mm_choose_dh(int min, int nbits, int max)
160 buffer_put_int(&m, min);
161 buffer_put_int(&m, nbits);
162 buffer_put_int(&m, max);
164 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
166 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
167 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
169 success = buffer_get_char(&m);
171 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
173 if ((p = BN_new()) == NULL)
174 fatal("%s: BN_new failed", __func__);
175 if ((g = BN_new()) == NULL)
176 fatal("%s: BN_new failed", __func__);
177 buffer_get_bignum2(&m, p);
178 buffer_get_bignum2(&m, g);
180 debug3("%s: remaining %d", __func__, buffer_len(&m));
183 return (dh_new_group(g, p));
187 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
189 Kex *kex = *pmonitor->m_pkex;
192 debug3("%s entering", __func__);
195 buffer_put_int(&m, kex->host_key_index(key));
196 buffer_put_string(&m, data, datalen);
198 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
200 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
201 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
202 *sigp = buffer_get_string(&m, lenp);
209 mm_getpwnamallow(const char *username)
214 ServerOptions *newopts;
216 debug3("%s entering", __func__);
219 buffer_put_cstring(&m, username);
221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
223 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
224 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
226 if (buffer_get_char(&m) == 0) {
230 pw = buffer_get_string(&m, &len);
231 if (len != sizeof(struct passwd))
232 fatal("%s: struct passwd size mismatch", __func__);
233 pw->pw_name = buffer_get_string(&m, NULL);
234 pw->pw_passwd = buffer_get_string(&m, NULL);
235 pw->pw_gecos = buffer_get_string(&m, NULL);
236 #ifdef HAVE_PW_CLASS_IN_PASSWD
237 pw->pw_class = buffer_get_string(&m, NULL);
239 pw->pw_dir = buffer_get_string(&m, NULL);
240 pw->pw_shell = buffer_get_string(&m, NULL);
243 /* copy options block as a Match directive may have changed some */
244 newopts = buffer_get_string(&m, &len);
245 if (len != sizeof(*newopts))
246 fatal("%s: option block size mismatch", __func__);
247 if (newopts->banner != NULL)
248 newopts->banner = buffer_get_string(&m, NULL);
249 copy_set_server_options(&options, newopts, 1);
258 mm_auth2_read_banner(void)
263 debug3("%s entering", __func__);
266 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
269 mm_request_receive_expect(pmonitor->m_recvfd,
270 MONITOR_ANS_AUTH2_READ_BANNER, &m);
271 banner = buffer_get_string(&m, NULL);
274 /* treat empty banner as missing banner */
275 if (strlen(banner) == 0) {
282 /* Inform the privileged process about service, style, and role */
285 mm_inform_authserv(char *service, char *style, char *role)
289 debug3("%s entering", __func__);
292 buffer_put_cstring(&m, service);
293 buffer_put_cstring(&m, style ? style : "");
294 buffer_put_cstring(&m, role ? role : "");
296 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
301 /* Inform the privileged process about role */
304 mm_inform_authrole(char *role)
308 debug3("%s entering", __func__);
311 buffer_put_cstring(&m, role ? role : "");
313 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHROLE, &m);
318 /* Do the password authentication */
320 mm_auth_password(Authctxt *authctxt, char *password)
323 int authenticated = 0;
325 debug3("%s entering", __func__);
328 buffer_put_cstring(&m, password);
329 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
331 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
332 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
334 authenticated = buffer_get_int(&m);
338 debug3("%s: user %sauthenticated",
339 __func__, authenticated ? "" : "not ");
340 return (authenticated);
344 mm_user_key_allowed(struct passwd *pw, Key *key)
346 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
350 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
353 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
357 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
358 char *host, Key *key)
362 key->type = KEY_RSA; /* XXX hack for key_to_blob */
363 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
364 key->type = KEY_RSA1;
369 mm_send_debug(Buffer *m)
373 while (buffer_len(m)) {
374 msg = buffer_get_string(m, NULL);
375 debug3("%s: Sending debug: %s", __func__, msg);
376 packet_send_debug("%s", msg);
382 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
387 int allowed = 0, have_forced = 0;
389 debug3("%s entering", __func__);
391 /* Convert the key to a blob and the pass it over */
392 if (!key_to_blob(key, &blob, &len))
396 buffer_put_int(&m, type);
397 buffer_put_cstring(&m, user ? user : "");
398 buffer_put_cstring(&m, host ? host : "");
399 buffer_put_string(&m, blob, len);
402 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
404 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
405 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
407 allowed = buffer_get_int(&m);
409 /* fake forced command */
410 auth_clear_options();
411 have_forced = buffer_get_int(&m);
412 forced_command = have_forced ? xstrdup("true") : NULL;
414 /* Send potential debug messages */
423 * This key verify needs to send the key type along, because the
424 * privileged parent makes the decision if the key is allowed
425 * for authentication.
429 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
436 debug3("%s entering", __func__);
438 /* Convert the key to a blob and the pass it over */
439 if (!key_to_blob(key, &blob, &len))
443 buffer_put_string(&m, blob, len);
444 buffer_put_string(&m, sig, siglen);
445 buffer_put_string(&m, data, datalen);
448 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
450 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
451 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
453 verified = buffer_get_int(&m);
460 /* Export key state after authentication */
462 mm_newkeys_from_blob(u_char *blob, int blen)
466 Newkeys *newkey = NULL;
471 debug3("%s: %p(%d)", __func__, blob, blen);
473 dump_base64(stderr, blob, blen);
476 buffer_append(&b, blob, blen);
478 newkey = xmalloc(sizeof(*newkey));
481 comp = &newkey->comp;
484 enc->name = buffer_get_string(&b, NULL);
485 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
486 enc->enabled = buffer_get_int(&b);
487 enc->block_size = buffer_get_int(&b);
488 enc->key = buffer_get_string(&b, &enc->key_len);
489 enc->iv = buffer_get_string(&b, &len);
490 if (len != enc->block_size)
491 fatal("%s: bad ivlen: expected %u != %u", __func__,
492 enc->block_size, len);
494 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
495 fatal("%s: bad cipher name %s or pointer %p", __func__,
496 enc->name, enc->cipher);
499 mac->name = buffer_get_string(&b, NULL);
500 if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
501 fatal("%s: can not setup mac %s", __func__, mac->name);
502 mac->enabled = buffer_get_int(&b);
503 mac->key = buffer_get_string(&b, &len);
504 if (len > mac->key_len)
505 fatal("%s: bad mac key length: %u > %d", __func__, len,
510 comp->type = buffer_get_int(&b);
511 comp->enabled = buffer_get_int(&b);
512 comp->name = buffer_get_string(&b, NULL);
514 len = buffer_len(&b);
516 error("newkeys_from_blob: remaining bytes in blob %u", len);
522 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
529 Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
531 debug3("%s: converting %p", __func__, newkey);
533 if (newkey == NULL) {
534 error("%s: newkey == NULL", __func__);
539 comp = &newkey->comp;
543 buffer_put_cstring(&b, enc->name);
544 /* The cipher struct is constant and shared, you export pointer */
545 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
546 buffer_put_int(&b, enc->enabled);
547 buffer_put_int(&b, enc->block_size);
548 buffer_put_string(&b, enc->key, enc->key_len);
549 packet_get_keyiv(mode, enc->iv, enc->block_size);
550 buffer_put_string(&b, enc->iv, enc->block_size);
553 buffer_put_cstring(&b, mac->name);
554 buffer_put_int(&b, mac->enabled);
555 buffer_put_string(&b, mac->key, mac->key_len);
558 buffer_put_int(&b, comp->type);
559 buffer_put_int(&b, comp->enabled);
560 buffer_put_cstring(&b, comp->name);
562 len = buffer_len(&b);
566 *blobp = xmalloc(len);
567 memcpy(*blobp, buffer_ptr(&b), len);
569 memset(buffer_ptr(&b), 0, len);
575 mm_send_kex(Buffer *m, Kex *kex)
577 buffer_put_string(m, kex->session_id, kex->session_id_len);
578 buffer_put_int(m, kex->we_need);
579 buffer_put_int(m, kex->hostkey_type);
580 buffer_put_int(m, kex->kex_type);
581 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
582 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
583 buffer_put_int(m, kex->flags);
584 buffer_put_cstring(m, kex->client_version_string);
585 buffer_put_cstring(m, kex->server_version_string);
589 mm_send_keystate(struct monitor *monitor)
591 Buffer m, *input, *output;
594 u_int32_t seqnr, packets;
595 u_int64_t blocks, bytes;
604 buffer_put_int(&m, packet_get_protocol_flags());
606 buffer_put_int(&m, packet_get_ssh1_cipher());
608 debug3("%s: Sending ssh1 KEY+IV", __func__);
609 keylen = packet_get_encryption_key(NULL);
610 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
611 keylen = packet_get_encryption_key(key);
612 buffer_put_string(&m, key, keylen);
613 memset(key, 0, keylen);
616 ivlen = packet_get_keyiv_len(MODE_OUT);
617 packet_get_keyiv(MODE_OUT, iv, ivlen);
618 buffer_put_string(&m, iv, ivlen);
619 ivlen = packet_get_keyiv_len(MODE_OUT);
620 packet_get_keyiv(MODE_IN, iv, ivlen);
621 buffer_put_string(&m, iv, ivlen);
624 /* Kex for rekeying */
625 mm_send_kex(&m, *monitor->m_pkex);
628 debug3("%s: Sending new keys: %p %p",
629 __func__, packet_get_newkeys(MODE_OUT),
630 packet_get_newkeys(MODE_IN));
633 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
634 fatal("%s: conversion of newkeys failed", __func__);
636 buffer_put_string(&m, blob, bloblen);
639 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
640 fatal("%s: conversion of newkeys failed", __func__);
642 buffer_put_string(&m, blob, bloblen);
645 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
646 buffer_put_int(&m, seqnr);
647 buffer_put_int64(&m, blocks);
648 buffer_put_int(&m, packets);
649 buffer_put_int64(&m, bytes);
650 packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
651 buffer_put_int(&m, seqnr);
652 buffer_put_int64(&m, blocks);
653 buffer_put_int(&m, packets);
654 buffer_put_int64(&m, bytes);
656 debug3("%s: New keys have been sent", __func__);
658 /* More key context */
659 plen = packet_get_keycontext(MODE_OUT, NULL);
661 packet_get_keycontext(MODE_OUT, p);
662 buffer_put_string(&m, p, plen);
665 plen = packet_get_keycontext(MODE_IN, NULL);
667 packet_get_keycontext(MODE_IN, p);
668 buffer_put_string(&m, p, plen);
671 /* Compression state */
672 debug3("%s: Sending compression state", __func__);
673 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
674 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
676 /* Network I/O buffers */
677 input = (Buffer *)packet_get_input();
678 output = (Buffer *)packet_get_output();
679 buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
680 buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
684 buffer_put_int64(&m, get_sent_bytes());
685 buffer_put_int64(&m, get_recv_bytes());
688 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
689 debug3("%s: Finished sending state", __func__);
695 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
699 int success = 0, tmp1 = -1, tmp2 = -1;
701 /* Kludge: ensure there are fds free to receive the pty/tty */
702 if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
703 (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
704 error("%s: cannot allocate fds for pty", __func__);
715 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
717 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
718 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
720 success = buffer_get_int(&m);
722 debug3("%s: pty alloc failed", __func__);
726 p = buffer_get_string(&m, NULL);
727 msg = buffer_get_string(&m, NULL);
730 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
733 buffer_append(&loginmsg, msg, strlen(msg));
736 if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
737 (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
738 fatal("%s: receive fds failed", __func__);
745 mm_session_pty_cleanup2(Session *s)
752 buffer_put_cstring(&m, s->tty);
753 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
756 /* closed dup'ed master */
757 if (s->ptymaster != -1 && close(s->ptymaster) < 0)
758 error("close(s->ptymaster/%d): %s",
759 s->ptymaster, strerror(errno));
761 /* unlink pty from session */
767 mm_start_pam(Authctxt *authctxt)
771 debug3("%s entering", __func__);
772 if (!options.use_pam)
773 fatal("UsePAM=no, but ended up in %s anyway", __func__);
776 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
782 mm_do_pam_account(void)
788 debug3("%s entering", __func__);
789 if (!options.use_pam)
790 fatal("UsePAM=no, but ended up in %s anyway", __func__);
793 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
795 mm_request_receive_expect(pmonitor->m_recvfd,
796 MONITOR_ANS_PAM_ACCOUNT, &m);
797 ret = buffer_get_int(&m);
798 msg = buffer_get_string(&m, NULL);
799 buffer_append(&loginmsg, msg, strlen(msg));
804 debug3("%s returning %d", __func__, ret);
810 mm_sshpam_init_ctx(Authctxt *authctxt)
815 debug3("%s", __func__);
817 buffer_put_cstring(&m, authctxt->user);
818 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
819 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
820 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
821 success = buffer_get_int(&m);
823 debug3("%s: pam_init_ctx failed", __func__);
832 mm_sshpam_query(void *ctx, char **name, char **info,
833 u_int *num, char ***prompts, u_int **echo_on)
839 debug3("%s", __func__);
841 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
842 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
843 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
844 ret = buffer_get_int(&m);
845 debug3("%s: pam_query returned %d", __func__, ret);
846 *name = buffer_get_string(&m, NULL);
847 *info = buffer_get_string(&m, NULL);
848 *num = buffer_get_int(&m);
849 if (*num > PAM_MAX_NUM_MSG)
850 fatal("%s: recieved %u PAM messages, expected <= %u",
851 __func__, *num, PAM_MAX_NUM_MSG);
852 *prompts = xcalloc((*num + 1), sizeof(char *));
853 *echo_on = xcalloc((*num + 1), sizeof(u_int));
854 for (i = 0; i < *num; ++i) {
855 (*prompts)[i] = buffer_get_string(&m, NULL);
856 (*echo_on)[i] = buffer_get_int(&m);
863 mm_sshpam_respond(void *ctx, u_int num, char **resp)
869 debug3("%s", __func__);
871 buffer_put_int(&m, num);
872 for (i = 0; i < num; ++i)
873 buffer_put_cstring(&m, resp[i]);
874 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
875 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
876 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
877 ret = buffer_get_int(&m);
878 debug3("%s: pam_respond returned %d", __func__, ret);
884 mm_sshpam_free_ctx(void *ctxtp)
888 debug3("%s", __func__);
890 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
891 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
892 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
897 /* Request process termination */
905 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
910 mm_ssh1_session_key(BIGNUM *num)
916 buffer_put_bignum2(&m, num);
917 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
919 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
921 rsafail = buffer_get_int(&m);
922 buffer_get_bignum2(&m, num);
930 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
931 char ***prompts, u_int **echo_on)
934 *infotxt = xstrdup("");
936 *prompts = xcalloc(*numprompts, sizeof(char *));
937 *echo_on = xcalloc(*numprompts, sizeof(u_int));
942 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
943 u_int *numprompts, char ***prompts, u_int **echo_on)
949 debug3("%s: entering", __func__);
952 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
954 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
956 success = buffer_get_int(&m);
958 debug3("%s: no challenge", __func__);
963 /* Get the challenge, and format the response */
964 challenge = buffer_get_string(&m, NULL);
967 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
968 (*prompts)[0] = challenge;
970 debug3("%s: received challenge: %s", __func__, challenge);
976 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
981 debug3("%s: entering", __func__);
982 if (numresponses != 1)
986 buffer_put_cstring(&m, responses[0]);
987 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
989 mm_request_receive_expect(pmonitor->m_recvfd,
990 MONITOR_ANS_BSDAUTHRESPOND, &m);
992 authok = buffer_get_int(&m);
995 return ((authok == 0) ? -1 : 0);
1000 mm_skey_query(void *ctx, char **name, char **infotxt,
1001 u_int *numprompts, char ***prompts, u_int **echo_on)
1007 debug3("%s: entering", __func__);
1010 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
1012 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
1014 success = buffer_get_int(&m);
1016 debug3("%s: no challenge", __func__);
1021 /* Get the challenge, and format the response */
1022 challenge = buffer_get_string(&m, NULL);
1025 debug3("%s: received challenge: %s", __func__, challenge);
1027 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1029 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1036 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1041 debug3("%s: entering", __func__);
1042 if (numresponses != 1)
1046 buffer_put_cstring(&m, responses[0]);
1047 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1049 mm_request_receive_expect(pmonitor->m_recvfd,
1050 MONITOR_ANS_SKEYRESPOND, &m);
1052 authok = buffer_get_int(&m);
1055 return ((authok == 0) ? -1 : 0);
1060 mm_ssh1_session_id(u_char session_id[16])
1065 debug3("%s entering", __func__);
1068 for (i = 0; i < 16; i++)
1069 buffer_put_char(&m, session_id[i]);
1071 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1076 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1082 int allowed = 0, have_forced = 0;
1084 debug3("%s entering", __func__);
1087 buffer_put_bignum2(&m, client_n);
1089 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1090 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1092 allowed = buffer_get_int(&m);
1094 /* fake forced command */
1095 auth_clear_options();
1096 have_forced = buffer_get_int(&m);
1097 forced_command = have_forced ? xstrdup("true") : NULL;
1099 if (allowed && rkey != NULL) {
1100 blob = buffer_get_string(&m, &blen);
1101 if ((key = key_from_blob(blob, blen)) == NULL)
1102 fatal("%s: key_from_blob failed", __func__);
1113 mm_auth_rsa_generate_challenge(Key *key)
1120 debug3("%s entering", __func__);
1122 if ((challenge = BN_new()) == NULL)
1123 fatal("%s: BN_new failed", __func__);
1125 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1126 if (key_to_blob(key, &blob, &blen) == 0)
1127 fatal("%s: key_to_blob failed", __func__);
1128 key->type = KEY_RSA1;
1131 buffer_put_string(&m, blob, blen);
1134 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1135 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1137 buffer_get_bignum2(&m, challenge);
1144 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1151 debug3("%s entering", __func__);
1153 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1154 if (key_to_blob(key, &blob, &blen) == 0)
1155 fatal("%s: key_to_blob failed", __func__);
1156 key->type = KEY_RSA1;
1159 buffer_put_string(&m, blob, blen);
1160 buffer_put_string(&m, response, 16);
1163 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1164 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1166 success = buffer_get_int(&m);
1172 #ifdef SSH_AUDIT_EVENTS
1174 mm_audit_event(ssh_audit_event_t event)
1178 debug3("%s entering", __func__);
1181 buffer_put_int(&m, event);
1183 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1188 mm_audit_run_command(const char *command)
1192 debug3("%s entering command %s", __func__, command);
1195 buffer_put_cstring(&m, command);
1197 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1200 #endif /* SSH_AUDIT_EVENTS */
1204 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1209 /* Client doesn't get to see the context */
1213 buffer_put_string(&m, goid->elements, goid->length);
1215 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1216 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1218 major = buffer_get_int(&m);
1225 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1226 gss_buffer_desc *out, OM_uint32 *flags)
1233 buffer_put_string(&m, in->value, in->length);
1235 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1236 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1238 major = buffer_get_int(&m);
1239 out->value = buffer_get_string(&m, &len);
1242 *flags = buffer_get_int(&m);
1250 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1256 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1257 buffer_put_string(&m, gssmic->value, gssmic->length);
1259 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1260 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1263 major = buffer_get_int(&m);
1269 mm_ssh_gssapi_userok(char *user, struct passwd *pw)
1272 int authenticated = 0;
1276 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1277 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1280 authenticated = buffer_get_int(&m);
1283 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1284 return (authenticated);
1288 mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash)
1295 buffer_put_string(&m, data->value, data->length);
1297 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m);
1298 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m);
1300 major = buffer_get_int(&m);
1301 hash->value = buffer_get_string(&m, &len);
1310 mm_ssh_gssapi_update_creds(ssh_gssapi_ccache *store)
1317 buffer_put_cstring(&m, store->filename ? store->filename : "");
1318 buffer_put_cstring(&m, store->envvar ? store->envvar : "");
1319 buffer_put_cstring(&m, store->envval ? store->envval : "");
1321 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUPCREDS, &m);
1322 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUPCREDS, &m);
1324 ok = buffer_get_int(&m);
1335 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1336 char **hash_scheme, char **salt)
1340 debug3("%s entering", __func__);
1343 mm_request_send(pmonitor->m_recvfd,
1344 MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1346 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1347 mm_request_receive_expect(pmonitor->m_recvfd,
1348 MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1350 *hash_scheme = buffer_get_string(&m, NULL);
1351 *salt = buffer_get_string(&m, NULL);
1357 mm_jpake_step1(struct modp_group *grp,
1358 u_char **id, u_int *id_len,
1359 BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1360 u_char **priv1_proof, u_int *priv1_proof_len,
1361 u_char **priv2_proof, u_int *priv2_proof_len)
1365 debug3("%s entering", __func__);
1368 mm_request_send(pmonitor->m_recvfd,
1369 MONITOR_REQ_JPAKE_STEP1, &m);
1371 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1372 mm_request_receive_expect(pmonitor->m_recvfd,
1373 MONITOR_ANS_JPAKE_STEP1, &m);
1375 if ((*priv1 = BN_new()) == NULL ||
1376 (*priv2 = BN_new()) == NULL ||
1377 (*g_priv1 = BN_new()) == NULL ||
1378 (*g_priv2 = BN_new()) == NULL)
1379 fatal("%s: BN_new", __func__);
1381 *id = buffer_get_string(&m, id_len);
1382 /* priv1 and priv2 are, well, private */
1383 buffer_get_bignum2(&m, *g_priv1);
1384 buffer_get_bignum2(&m, *g_priv2);
1385 *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1386 *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1392 mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1393 BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1394 const u_char *theirid, u_int theirid_len,
1395 const u_char *myid, u_int myid_len,
1396 const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1397 const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1399 u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1403 debug3("%s entering", __func__);
1406 /* monitor already has all bignums except theirpub1, theirpub2 */
1407 buffer_put_bignum2(&m, theirpub1);
1408 buffer_put_bignum2(&m, theirpub2);
1409 /* monitor already knows our id */
1410 buffer_put_string(&m, theirid, theirid_len);
1411 buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1412 buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1414 mm_request_send(pmonitor->m_recvfd,
1415 MONITOR_REQ_JPAKE_STEP2, &m);
1417 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1418 mm_request_receive_expect(pmonitor->m_recvfd,
1419 MONITOR_ANS_JPAKE_STEP2, &m);
1421 if ((*newpub = BN_new()) == NULL)
1422 fatal("%s: BN_new", __func__);
1424 buffer_get_bignum2(&m, *newpub);
1425 *newpub_exponent_proof = buffer_get_string(&m,
1426 newpub_exponent_proof_len);
1432 mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1433 BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1434 BIGNUM *theirpub1, BIGNUM *theirpub2,
1435 const u_char *my_id, u_int my_id_len,
1436 const u_char *their_id, u_int their_id_len,
1437 const u_char *sess_id, u_int sess_id_len,
1438 const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1440 u_char **confirm_hash, u_int *confirm_hash_len)
1444 debug3("%s entering", __func__);
1447 /* monitor already has all bignums except step2_val */
1448 buffer_put_bignum2(&m, step2_val);
1449 /* monitor already knows all the ids */
1450 buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1452 mm_request_send(pmonitor->m_recvfd,
1453 MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1455 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1456 mm_request_receive_expect(pmonitor->m_recvfd,
1457 MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1459 /* 'k' is sensitive and stays in the monitor */
1460 *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1466 mm_jpake_check_confirm(const BIGNUM *k,
1467 const u_char *peer_id, u_int peer_id_len,
1468 const u_char *sess_id, u_int sess_id_len,
1469 const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1474 debug3("%s entering", __func__);
1477 /* k is dummy in slave, ignored */
1478 /* monitor knows all the ids */
1479 buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1480 mm_request_send(pmonitor->m_recvfd,
1481 MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1483 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1484 mm_request_receive_expect(pmonitor->m_recvfd,
1485 MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1487 success = buffer_get_int(&m);
1490 debug3("%s: success = %d", __func__, success);