1 /* $OpenBSD: monitor_wrap.c,v 1.64 2008/11/04 08:22:13 djm 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"
82 extern Newkeys
*newkeys
[];
83 extern z_stream incoming_stream
;
84 extern z_stream outgoing_stream
;
85 extern struct monitor
*pmonitor
;
86 extern Buffer input
, output
;
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 and style */
285 mm_inform_authserv(char *service
, char *style
)
289 debug3("%s entering", __func__
);
292 buffer_put_cstring(&m
, service
);
293 buffer_put_cstring(&m
, style
? style
: "");
295 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_AUTHSERV
, &m
);
300 /* Do the password authentication */
302 mm_auth_password(Authctxt
*authctxt
, char *password
)
305 int authenticated
= 0;
307 debug3("%s entering", __func__
);
310 buffer_put_cstring(&m
, password
);
311 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_AUTHPASSWORD
, &m
);
313 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__
);
314 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_AUTHPASSWORD
, &m
);
316 authenticated
= buffer_get_int(&m
);
320 debug3("%s: user %sauthenticated",
321 __func__
, authenticated
? "" : "not ");
322 return (authenticated
);
326 mm_user_key_allowed(struct passwd
*pw
, Key
*key
)
328 return (mm_key_allowed(MM_USERKEY
, NULL
, NULL
, key
));
332 mm_hostbased_key_allowed(struct passwd
*pw
, char *user
, char *host
,
335 return (mm_key_allowed(MM_HOSTKEY
, user
, host
, key
));
339 mm_auth_rhosts_rsa_key_allowed(struct passwd
*pw
, char *user
,
340 char *host
, Key
*key
)
344 key
->type
= KEY_RSA
; /* XXX hack for key_to_blob */
345 ret
= mm_key_allowed(MM_RSAHOSTKEY
, user
, host
, key
);
346 key
->type
= KEY_RSA1
;
351 mm_send_debug(Buffer
*m
)
355 while (buffer_len(m
)) {
356 msg
= buffer_get_string(m
, NULL
);
357 debug3("%s: Sending debug: %s", __func__
, msg
);
358 packet_send_debug("%s", msg
);
364 mm_key_allowed(enum mm_keytype type
, char *user
, char *host
, Key
*key
)
369 int allowed
= 0, have_forced
= 0;
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_int(&m
, type
);
379 buffer_put_cstring(&m
, user
? user
: "");
380 buffer_put_cstring(&m
, host
? host
: "");
381 buffer_put_string(&m
, blob
, len
);
384 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_KEYALLOWED
, &m
);
386 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__
);
387 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_KEYALLOWED
, &m
);
389 allowed
= buffer_get_int(&m
);
391 /* fake forced command */
392 auth_clear_options();
393 have_forced
= buffer_get_int(&m
);
394 forced_command
= have_forced
? xstrdup("true") : NULL
;
396 /* Send potential debug messages */
405 * This key verify needs to send the key type along, because the
406 * privileged parent makes the decision if the key is allowed
407 * for authentication.
411 mm_key_verify(Key
*key
, u_char
*sig
, u_int siglen
, u_char
*data
, u_int datalen
)
418 debug3("%s entering", __func__
);
420 /* Convert the key to a blob and the pass it over */
421 if (!key_to_blob(key
, &blob
, &len
))
425 buffer_put_string(&m
, blob
, len
);
426 buffer_put_string(&m
, sig
, siglen
);
427 buffer_put_string(&m
, data
, datalen
);
430 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_KEYVERIFY
, &m
);
432 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__
);
433 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_KEYVERIFY
, &m
);
435 verified
= buffer_get_int(&m
);
442 /* Export key state after authentication */
444 mm_newkeys_from_blob(u_char
*blob
, int blen
)
448 Newkeys
*newkey
= NULL
;
453 debug3("%s: %p(%d)", __func__
, blob
, blen
);
455 dump_base64(stderr
, blob
, blen
);
458 buffer_append(&b
, blob
, blen
);
460 newkey
= xmalloc(sizeof(*newkey
));
463 comp
= &newkey
->comp
;
466 enc
->name
= buffer_get_string(&b
, NULL
);
467 buffer_get(&b
, &enc
->cipher
, sizeof(enc
->cipher
));
468 enc
->enabled
= buffer_get_int(&b
);
469 enc
->block_size
= buffer_get_int(&b
);
470 enc
->key
= buffer_get_string(&b
, &enc
->key_len
);
471 enc
->iv
= buffer_get_string(&b
, &len
);
472 if (len
!= enc
->block_size
)
473 fatal("%s: bad ivlen: expected %u != %u", __func__
,
474 enc
->block_size
, len
);
476 if (enc
->name
== NULL
|| cipher_by_name(enc
->name
) != enc
->cipher
)
477 fatal("%s: bad cipher name %s or pointer %p", __func__
,
478 enc
->name
, enc
->cipher
);
481 mac
->name
= buffer_get_string(&b
, NULL
);
482 if (mac
->name
== NULL
|| mac_setup(mac
, mac
->name
) == -1)
483 fatal("%s: can not setup mac %s", __func__
, mac
->name
);
484 mac
->enabled
= buffer_get_int(&b
);
485 mac
->key
= buffer_get_string(&b
, &len
);
486 if (len
> mac
->key_len
)
487 fatal("%s: bad mac key length: %u > %d", __func__
, len
,
492 comp
->type
= buffer_get_int(&b
);
493 comp
->enabled
= buffer_get_int(&b
);
494 comp
->name
= buffer_get_string(&b
, NULL
);
496 len
= buffer_len(&b
);
498 error("newkeys_from_blob: remaining bytes in blob %u", len
);
504 mm_newkeys_to_blob(int mode
, u_char
**blobp
, u_int
*lenp
)
511 Newkeys
*newkey
= newkeys
[mode
];
513 debug3("%s: converting %p", __func__
, newkey
);
515 if (newkey
== NULL
) {
516 error("%s: newkey == NULL", __func__
);
521 comp
= &newkey
->comp
;
525 buffer_put_cstring(&b
, enc
->name
);
526 /* The cipher struct is constant and shared, you export pointer */
527 buffer_append(&b
, &enc
->cipher
, sizeof(enc
->cipher
));
528 buffer_put_int(&b
, enc
->enabled
);
529 buffer_put_int(&b
, enc
->block_size
);
530 buffer_put_string(&b
, enc
->key
, enc
->key_len
);
531 packet_get_keyiv(mode
, enc
->iv
, enc
->block_size
);
532 buffer_put_string(&b
, enc
->iv
, enc
->block_size
);
535 buffer_put_cstring(&b
, mac
->name
);
536 buffer_put_int(&b
, mac
->enabled
);
537 buffer_put_string(&b
, mac
->key
, mac
->key_len
);
540 buffer_put_int(&b
, comp
->type
);
541 buffer_put_int(&b
, comp
->enabled
);
542 buffer_put_cstring(&b
, comp
->name
);
544 len
= buffer_len(&b
);
548 *blobp
= xmalloc(len
);
549 memcpy(*blobp
, buffer_ptr(&b
), len
);
551 memset(buffer_ptr(&b
), 0, len
);
557 mm_send_kex(Buffer
*m
, Kex
*kex
)
559 buffer_put_string(m
, kex
->session_id
, kex
->session_id_len
);
560 buffer_put_int(m
, kex
->we_need
);
561 buffer_put_int(m
, kex
->hostkey_type
);
562 buffer_put_int(m
, kex
->kex_type
);
563 buffer_put_string(m
, buffer_ptr(&kex
->my
), buffer_len(&kex
->my
));
564 buffer_put_string(m
, buffer_ptr(&kex
->peer
), buffer_len(&kex
->peer
));
565 buffer_put_int(m
, kex
->flags
);
566 buffer_put_cstring(m
, kex
->client_version_string
);
567 buffer_put_cstring(m
, kex
->server_version_string
);
571 mm_send_keystate(struct monitor
*monitor
)
576 u_int32_t seqnr
, packets
;
577 u_int64_t blocks
, bytes
;
586 buffer_put_int(&m
, packet_get_protocol_flags());
588 buffer_put_int(&m
, packet_get_ssh1_cipher());
590 debug3("%s: Sending ssh1 KEY+IV", __func__
);
591 keylen
= packet_get_encryption_key(NULL
);
592 key
= xmalloc(keylen
+1); /* add 1 if keylen == 0 */
593 keylen
= packet_get_encryption_key(key
);
594 buffer_put_string(&m
, key
, keylen
);
595 memset(key
, 0, keylen
);
598 ivlen
= packet_get_keyiv_len(MODE_OUT
);
599 packet_get_keyiv(MODE_OUT
, iv
, ivlen
);
600 buffer_put_string(&m
, iv
, ivlen
);
601 ivlen
= packet_get_keyiv_len(MODE_OUT
);
602 packet_get_keyiv(MODE_IN
, iv
, ivlen
);
603 buffer_put_string(&m
, iv
, ivlen
);
606 /* Kex for rekeying */
607 mm_send_kex(&m
, *monitor
->m_pkex
);
610 debug3("%s: Sending new keys: %p %p",
611 __func__
, newkeys
[MODE_OUT
], newkeys
[MODE_IN
]);
614 if (!mm_newkeys_to_blob(MODE_OUT
, &blob
, &bloblen
))
615 fatal("%s: conversion of newkeys failed", __func__
);
617 buffer_put_string(&m
, blob
, bloblen
);
620 if (!mm_newkeys_to_blob(MODE_IN
, &blob
, &bloblen
))
621 fatal("%s: conversion of newkeys failed", __func__
);
623 buffer_put_string(&m
, blob
, bloblen
);
626 packet_get_state(MODE_OUT
, &seqnr
, &blocks
, &packets
, &bytes
);
627 buffer_put_int(&m
, seqnr
);
628 buffer_put_int64(&m
, blocks
);
629 buffer_put_int(&m
, packets
);
630 buffer_put_int64(&m
, bytes
);
631 packet_get_state(MODE_IN
, &seqnr
, &blocks
, &packets
, &bytes
);
632 buffer_put_int(&m
, seqnr
);
633 buffer_put_int64(&m
, blocks
);
634 buffer_put_int(&m
, packets
);
635 buffer_put_int64(&m
, bytes
);
637 debug3("%s: New keys have been sent", __func__
);
639 /* More key context */
640 plen
= packet_get_keycontext(MODE_OUT
, NULL
);
642 packet_get_keycontext(MODE_OUT
, p
);
643 buffer_put_string(&m
, p
, plen
);
646 plen
= packet_get_keycontext(MODE_IN
, NULL
);
648 packet_get_keycontext(MODE_IN
, p
);
649 buffer_put_string(&m
, p
, plen
);
652 /* Compression state */
653 debug3("%s: Sending compression state", __func__
);
654 buffer_put_string(&m
, &outgoing_stream
, sizeof(outgoing_stream
));
655 buffer_put_string(&m
, &incoming_stream
, sizeof(incoming_stream
));
657 /* Network I/O buffers */
658 buffer_put_string(&m
, buffer_ptr(&input
), buffer_len(&input
));
659 buffer_put_string(&m
, buffer_ptr(&output
), buffer_len(&output
));
661 mm_request_send(monitor
->m_recvfd
, MONITOR_REQ_KEYEXPORT
, &m
);
662 debug3("%s: Finished sending state", __func__
);
668 mm_pty_allocate(int *ptyfd
, int *ttyfd
, char *namebuf
, size_t namebuflen
)
672 int success
= 0, tmp1
= -1, tmp2
= -1;
674 /* Kludge: ensure there are fds free to receive the pty/tty */
675 if ((tmp1
= dup(pmonitor
->m_recvfd
)) == -1 ||
676 (tmp2
= dup(pmonitor
->m_recvfd
)) == -1) {
677 error("%s: cannot allocate fds for pty", __func__
);
688 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_PTY
, &m
);
690 debug3("%s: waiting for MONITOR_ANS_PTY", __func__
);
691 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_PTY
, &m
);
693 success
= buffer_get_int(&m
);
695 debug3("%s: pty alloc failed", __func__
);
699 p
= buffer_get_string(&m
, NULL
);
700 msg
= buffer_get_string(&m
, NULL
);
703 strlcpy(namebuf
, p
, namebuflen
); /* Possible truncation */
706 buffer_append(&loginmsg
, msg
, strlen(msg
));
709 if ((*ptyfd
= mm_receive_fd(pmonitor
->m_recvfd
)) == -1 ||
710 (*ttyfd
= mm_receive_fd(pmonitor
->m_recvfd
)) == -1)
711 fatal("%s: receive fds failed", __func__
);
718 mm_session_pty_cleanup2(Session
*s
)
725 buffer_put_cstring(&m
, s
->tty
);
726 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_PTYCLEANUP
, &m
);
729 /* closed dup'ed master */
730 if (s
->ptymaster
!= -1 && close(s
->ptymaster
) < 0)
731 error("close(s->ptymaster/%d): %s",
732 s
->ptymaster
, strerror(errno
));
734 /* unlink pty from session */
740 mm_start_pam(Authctxt
*authctxt
)
744 debug3("%s entering", __func__
);
745 if (!options
.use_pam
)
746 fatal("UsePAM=no, but ended up in %s anyway", __func__
);
749 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_PAM_START
, &m
);
755 mm_do_pam_account(void)
761 debug3("%s entering", __func__
);
762 if (!options
.use_pam
)
763 fatal("UsePAM=no, but ended up in %s anyway", __func__
);
766 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_PAM_ACCOUNT
, &m
);
768 mm_request_receive_expect(pmonitor
->m_recvfd
,
769 MONITOR_ANS_PAM_ACCOUNT
, &m
);
770 ret
= buffer_get_int(&m
);
771 msg
= buffer_get_string(&m
, NULL
);
772 buffer_append(&loginmsg
, msg
, strlen(msg
));
777 debug3("%s returning %d", __func__
, ret
);
783 mm_sshpam_init_ctx(Authctxt
*authctxt
)
788 debug3("%s", __func__
);
790 buffer_put_cstring(&m
, authctxt
->user
);
791 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_PAM_INIT_CTX
, &m
);
792 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__
);
793 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_PAM_INIT_CTX
, &m
);
794 success
= buffer_get_int(&m
);
796 debug3("%s: pam_init_ctx failed", __func__
);
805 mm_sshpam_query(void *ctx
, char **name
, char **info
,
806 u_int
*num
, char ***prompts
, u_int
**echo_on
)
812 debug3("%s", __func__
);
814 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_PAM_QUERY
, &m
);
815 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__
);
816 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_PAM_QUERY
, &m
);
817 ret
= buffer_get_int(&m
);
818 debug3("%s: pam_query returned %d", __func__
, ret
);
819 *name
= buffer_get_string(&m
, NULL
);
820 *info
= buffer_get_string(&m
, NULL
);
821 *num
= buffer_get_int(&m
);
822 if (*num
> PAM_MAX_NUM_MSG
)
823 fatal("%s: recieved %u PAM messages, expected <= %u",
824 __func__
, *num
, PAM_MAX_NUM_MSG
);
825 *prompts
= xcalloc((*num
+ 1), sizeof(char *));
826 *echo_on
= xcalloc((*num
+ 1), sizeof(u_int
));
827 for (i
= 0; i
< *num
; ++i
) {
828 (*prompts
)[i
] = buffer_get_string(&m
, NULL
);
829 (*echo_on
)[i
] = buffer_get_int(&m
);
836 mm_sshpam_respond(void *ctx
, u_int num
, char **resp
)
842 debug3("%s", __func__
);
844 buffer_put_int(&m
, num
);
845 for (i
= 0; i
< num
; ++i
)
846 buffer_put_cstring(&m
, resp
[i
]);
847 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_PAM_RESPOND
, &m
);
848 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__
);
849 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_PAM_RESPOND
, &m
);
850 ret
= buffer_get_int(&m
);
851 debug3("%s: pam_respond returned %d", __func__
, ret
);
857 mm_sshpam_free_ctx(void *ctxtp
)
861 debug3("%s", __func__
);
863 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_PAM_FREE_CTX
, &m
);
864 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__
);
865 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_PAM_FREE_CTX
, &m
);
870 /* Request process termination */
878 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_TERM
, &m
);
883 mm_ssh1_session_key(BIGNUM
*num
)
889 buffer_put_bignum2(&m
, num
);
890 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_SESSKEY
, &m
);
892 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_SESSKEY
, &m
);
894 rsafail
= buffer_get_int(&m
);
895 buffer_get_bignum2(&m
, num
);
903 mm_chall_setup(char **name
, char **infotxt
, u_int
*numprompts
,
904 char ***prompts
, u_int
**echo_on
)
907 *infotxt
= xstrdup("");
909 *prompts
= xcalloc(*numprompts
, sizeof(char *));
910 *echo_on
= xcalloc(*numprompts
, sizeof(u_int
));
915 mm_bsdauth_query(void *ctx
, char **name
, char **infotxt
,
916 u_int
*numprompts
, char ***prompts
, u_int
**echo_on
)
922 debug3("%s: entering", __func__
);
925 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_BSDAUTHQUERY
, &m
);
927 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_BSDAUTHQUERY
,
929 success
= buffer_get_int(&m
);
931 debug3("%s: no challenge", __func__
);
936 /* Get the challenge, and format the response */
937 challenge
= buffer_get_string(&m
, NULL
);
940 mm_chall_setup(name
, infotxt
, numprompts
, prompts
, echo_on
);
941 (*prompts
)[0] = challenge
;
943 debug3("%s: received challenge: %s", __func__
, challenge
);
949 mm_bsdauth_respond(void *ctx
, u_int numresponses
, char **responses
)
954 debug3("%s: entering", __func__
);
955 if (numresponses
!= 1)
959 buffer_put_cstring(&m
, responses
[0]);
960 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_BSDAUTHRESPOND
, &m
);
962 mm_request_receive_expect(pmonitor
->m_recvfd
,
963 MONITOR_ANS_BSDAUTHRESPOND
, &m
);
965 authok
= buffer_get_int(&m
);
968 return ((authok
== 0) ? -1 : 0);
973 mm_skey_query(void *ctx
, char **name
, char **infotxt
,
974 u_int
*numprompts
, char ***prompts
, u_int
**echo_on
)
980 debug3("%s: entering", __func__
);
983 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_SKEYQUERY
, &m
);
985 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_SKEYQUERY
,
987 success
= buffer_get_int(&m
);
989 debug3("%s: no challenge", __func__
);
994 /* Get the challenge, and format the response */
995 challenge
= buffer_get_string(&m
, NULL
);
998 debug3("%s: received challenge: %s", __func__
, challenge
);
1000 mm_chall_setup(name
, infotxt
, numprompts
, prompts
, echo_on
);
1002 xasprintf(*prompts
, "%s%s", challenge
, SKEY_PROMPT
);
1009 mm_skey_respond(void *ctx
, u_int numresponses
, char **responses
)
1014 debug3("%s: entering", __func__
);
1015 if (numresponses
!= 1)
1019 buffer_put_cstring(&m
, responses
[0]);
1020 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_SKEYRESPOND
, &m
);
1022 mm_request_receive_expect(pmonitor
->m_recvfd
,
1023 MONITOR_ANS_SKEYRESPOND
, &m
);
1025 authok
= buffer_get_int(&m
);
1028 return ((authok
== 0) ? -1 : 0);
1033 mm_ssh1_session_id(u_char session_id
[16])
1038 debug3("%s entering", __func__
);
1041 for (i
= 0; i
< 16; i
++)
1042 buffer_put_char(&m
, session_id
[i
]);
1044 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_SESSID
, &m
);
1049 mm_auth_rsa_key_allowed(struct passwd
*pw
, BIGNUM
*client_n
, Key
**rkey
)
1055 int allowed
= 0, have_forced
= 0;
1057 debug3("%s entering", __func__
);
1060 buffer_put_bignum2(&m
, client_n
);
1062 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_RSAKEYALLOWED
, &m
);
1063 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_RSAKEYALLOWED
, &m
);
1065 allowed
= buffer_get_int(&m
);
1067 /* fake forced command */
1068 auth_clear_options();
1069 have_forced
= buffer_get_int(&m
);
1070 forced_command
= have_forced
? xstrdup("true") : NULL
;
1072 if (allowed
&& rkey
!= NULL
) {
1073 blob
= buffer_get_string(&m
, &blen
);
1074 if ((key
= key_from_blob(blob
, blen
)) == NULL
)
1075 fatal("%s: key_from_blob failed", __func__
);
1086 mm_auth_rsa_generate_challenge(Key
*key
)
1093 debug3("%s entering", __func__
);
1095 if ((challenge
= BN_new()) == NULL
)
1096 fatal("%s: BN_new failed", __func__
);
1098 key
->type
= KEY_RSA
; /* XXX cheat for key_to_blob */
1099 if (key_to_blob(key
, &blob
, &blen
) == 0)
1100 fatal("%s: key_to_blob failed", __func__
);
1101 key
->type
= KEY_RSA1
;
1104 buffer_put_string(&m
, blob
, blen
);
1107 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_RSACHALLENGE
, &m
);
1108 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_RSACHALLENGE
, &m
);
1110 buffer_get_bignum2(&m
, challenge
);
1117 mm_auth_rsa_verify_response(Key
*key
, BIGNUM
*p
, u_char response
[16])
1124 debug3("%s entering", __func__
);
1126 key
->type
= KEY_RSA
; /* XXX cheat for key_to_blob */
1127 if (key_to_blob(key
, &blob
, &blen
) == 0)
1128 fatal("%s: key_to_blob failed", __func__
);
1129 key
->type
= KEY_RSA1
;
1132 buffer_put_string(&m
, blob
, blen
);
1133 buffer_put_string(&m
, response
, 16);
1136 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_RSARESPONSE
, &m
);
1137 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_RSARESPONSE
, &m
);
1139 success
= buffer_get_int(&m
);
1145 #ifdef SSH_AUDIT_EVENTS
1147 mm_audit_event(ssh_audit_event_t event
)
1151 debug3("%s entering", __func__
);
1154 buffer_put_int(&m
, event
);
1156 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_AUDIT_EVENT
, &m
);
1161 mm_audit_run_command(const char *command
)
1165 debug3("%s entering command %s", __func__
, command
);
1168 buffer_put_cstring(&m
, command
);
1170 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_AUDIT_COMMAND
, &m
);
1173 #endif /* SSH_AUDIT_EVENTS */
1177 mm_ssh_gssapi_server_ctx(Gssctxt
**ctx
, gss_OID goid
)
1182 /* Client doesn't get to see the context */
1186 buffer_put_string(&m
, goid
->elements
, goid
->length
);
1188 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_GSSSETUP
, &m
);
1189 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_GSSSETUP
, &m
);
1191 major
= buffer_get_int(&m
);
1198 mm_ssh_gssapi_accept_ctx(Gssctxt
*ctx
, gss_buffer_desc
*in
,
1199 gss_buffer_desc
*out
, OM_uint32
*flags
)
1206 buffer_put_string(&m
, in
->value
, in
->length
);
1208 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_GSSSTEP
, &m
);
1209 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_GSSSTEP
, &m
);
1211 major
= buffer_get_int(&m
);
1212 out
->value
= buffer_get_string(&m
, &len
);
1215 *flags
= buffer_get_int(&m
);
1223 mm_ssh_gssapi_checkmic(Gssctxt
*ctx
, gss_buffer_t gssbuf
, gss_buffer_t gssmic
)
1229 buffer_put_string(&m
, gssbuf
->value
, gssbuf
->length
);
1230 buffer_put_string(&m
, gssmic
->value
, gssmic
->length
);
1232 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_GSSCHECKMIC
, &m
);
1233 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_GSSCHECKMIC
,
1236 major
= buffer_get_int(&m
);
1242 mm_ssh_gssapi_userok(char *user
)
1245 int authenticated
= 0;
1249 mm_request_send(pmonitor
->m_recvfd
, MONITOR_REQ_GSSUSEROK
, &m
);
1250 mm_request_receive_expect(pmonitor
->m_recvfd
, MONITOR_ANS_GSSUSEROK
,
1253 authenticated
= buffer_get_int(&m
);
1256 debug3("%s: user %sauthenticated",__func__
, authenticated
? "" : "not ");
1257 return (authenticated
);
1263 mm_auth2_jpake_get_pwdata(Authctxt
*authctxt
, BIGNUM
**s
,
1264 char **hash_scheme
, char **salt
)
1268 debug3("%s entering", __func__
);
1271 mm_request_send(pmonitor
->m_recvfd
,
1272 MONITOR_REQ_JPAKE_GET_PWDATA
, &m
);
1274 debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__
);
1275 mm_request_receive_expect(pmonitor
->m_recvfd
,
1276 MONITOR_ANS_JPAKE_GET_PWDATA
, &m
);
1278 *hash_scheme
= buffer_get_string(&m
, NULL
);
1279 *salt
= buffer_get_string(&m
, NULL
);
1285 mm_jpake_step1(struct jpake_group
*grp
,
1286 u_char
**id
, u_int
*id_len
,
1287 BIGNUM
**priv1
, BIGNUM
**priv2
, BIGNUM
**g_priv1
, BIGNUM
**g_priv2
,
1288 u_char
**priv1_proof
, u_int
*priv1_proof_len
,
1289 u_char
**priv2_proof
, u_int
*priv2_proof_len
)
1293 debug3("%s entering", __func__
);
1296 mm_request_send(pmonitor
->m_recvfd
,
1297 MONITOR_REQ_JPAKE_STEP1
, &m
);
1299 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__
);
1300 mm_request_receive_expect(pmonitor
->m_recvfd
,
1301 MONITOR_ANS_JPAKE_STEP1
, &m
);
1303 if ((*priv1
= BN_new()) == NULL
||
1304 (*priv2
= BN_new()) == NULL
||
1305 (*g_priv1
= BN_new()) == NULL
||
1306 (*g_priv2
= BN_new()) == NULL
)
1307 fatal("%s: BN_new", __func__
);
1309 *id
= buffer_get_string(&m
, id_len
);
1310 /* priv1 and priv2 are, well, private */
1311 buffer_get_bignum2(&m
, *g_priv1
);
1312 buffer_get_bignum2(&m
, *g_priv2
);
1313 *priv1_proof
= buffer_get_string(&m
, priv1_proof_len
);
1314 *priv2_proof
= buffer_get_string(&m
, priv2_proof_len
);
1320 mm_jpake_step2(struct jpake_group
*grp
, BIGNUM
*s
,
1321 BIGNUM
*mypub1
, BIGNUM
*theirpub1
, BIGNUM
*theirpub2
, BIGNUM
*mypriv2
,
1322 const u_char
*theirid
, u_int theirid_len
,
1323 const u_char
*myid
, u_int myid_len
,
1324 const u_char
*theirpub1_proof
, u_int theirpub1_proof_len
,
1325 const u_char
*theirpub2_proof
, u_int theirpub2_proof_len
,
1327 u_char
**newpub_exponent_proof
, u_int
*newpub_exponent_proof_len
)
1331 debug3("%s entering", __func__
);
1334 /* monitor already has all bignums except theirpub1, theirpub2 */
1335 buffer_put_bignum2(&m
, theirpub1
);
1336 buffer_put_bignum2(&m
, theirpub2
);
1337 /* monitor already knows our id */
1338 buffer_put_string(&m
, theirid
, theirid_len
);
1339 buffer_put_string(&m
, theirpub1_proof
, theirpub1_proof_len
);
1340 buffer_put_string(&m
, theirpub2_proof
, theirpub2_proof_len
);
1342 mm_request_send(pmonitor
->m_recvfd
,
1343 MONITOR_REQ_JPAKE_STEP2
, &m
);
1345 debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__
);
1346 mm_request_receive_expect(pmonitor
->m_recvfd
,
1347 MONITOR_ANS_JPAKE_STEP2
, &m
);
1349 if ((*newpub
= BN_new()) == NULL
)
1350 fatal("%s: BN_new", __func__
);
1352 buffer_get_bignum2(&m
, *newpub
);
1353 *newpub_exponent_proof
= buffer_get_string(&m
,
1354 newpub_exponent_proof_len
);
1360 mm_jpake_key_confirm(struct jpake_group
*grp
, BIGNUM
*s
, BIGNUM
*step2_val
,
1361 BIGNUM
*mypriv2
, BIGNUM
*mypub1
, BIGNUM
*mypub2
,
1362 BIGNUM
*theirpub1
, BIGNUM
*theirpub2
,
1363 const u_char
*my_id
, u_int my_id_len
,
1364 const u_char
*their_id
, u_int their_id_len
,
1365 const u_char
*sess_id
, u_int sess_id_len
,
1366 const u_char
*theirpriv2_s_proof
, u_int theirpriv2_s_proof_len
,
1368 u_char
**confirm_hash
, u_int
*confirm_hash_len
)
1372 debug3("%s entering", __func__
);
1375 /* monitor already has all bignums except step2_val */
1376 buffer_put_bignum2(&m
, step2_val
);
1377 /* monitor already knows all the ids */
1378 buffer_put_string(&m
, theirpriv2_s_proof
, theirpriv2_s_proof_len
);
1380 mm_request_send(pmonitor
->m_recvfd
,
1381 MONITOR_REQ_JPAKE_KEY_CONFIRM
, &m
);
1383 debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__
);
1384 mm_request_receive_expect(pmonitor
->m_recvfd
,
1385 MONITOR_ANS_JPAKE_KEY_CONFIRM
, &m
);
1387 /* 'k' is sensitive and stays in the monitor */
1388 *confirm_hash
= buffer_get_string(&m
, confirm_hash_len
);
1394 mm_jpake_check_confirm(const BIGNUM
*k
,
1395 const u_char
*peer_id
, u_int peer_id_len
,
1396 const u_char
*sess_id
, u_int sess_id_len
,
1397 const u_char
*peer_confirm_hash
, u_int peer_confirm_hash_len
)
1402 debug3("%s entering", __func__
);
1405 /* k is dummy in slave, ignored */
1406 /* monitor knows all the ids */
1407 buffer_put_string(&m
, peer_confirm_hash
, peer_confirm_hash_len
);
1408 mm_request_send(pmonitor
->m_recvfd
,
1409 MONITOR_REQ_JPAKE_CHECK_CONFIRM
, &m
);
1411 debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__
);
1412 mm_request_receive_expect(pmonitor
->m_recvfd
,
1413 MONITOR_ANS_JPAKE_CHECK_CONFIRM
, &m
);
1415 success
= buffer_get_int(&m
);
1418 debug3("%s: success = %d", __func__
, success
);