blob: 3865539dfd1a872ace67f26d485a8e023b77068c [file] [log] [blame]
Damien Miller1c89ce02006-08-19 00:22:40 +10001/* $OpenBSD: monitor_wrap.c,v 1.54 2006/08/12 20:46:46 miod Exp $ */
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00002/*
3 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
4 * Copyright 2002 Markus Friedl <markus@openbsd.org>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
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.
15 *
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.
26 */
27
28#include "includes.h"
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000029
Damien Miller9f2abc42006-07-10 20:53:08 +100030#include <sys/types.h>
Darren Tucker1a3d6e72006-08-05 18:46:47 +100031#include <sys/uio.h>
Damien Miller9f2abc42006-07-10 20:53:08 +100032
Darren Tucker39972492006-07-12 22:22:46 +100033#include <errno.h>
Damien Miller9f2abc42006-07-10 20:53:08 +100034#include <pwd.h>
Damien Millerd7834352006-08-05 12:39:39 +100035#include <signal.h>
Damien Millerded319c2006-09-01 15:38:36 +100036#include <stdarg.h>
Damien Millera7a73ee2006-08-05 11:37:59 +100037#include <stdio.h>
Damien Millere3476ed2006-07-24 14:13:33 +100038#include <string.h>
Darren Tucker1a3d6e72006-08-05 18:46:47 +100039#include <unistd.h>
Damien Miller9f2abc42006-07-10 20:53:08 +100040
Damien Millerd7834352006-08-05 12:39:39 +100041#include <openssl/bn.h>
42#include <openssl/dh.h>
43
44#include "xmalloc.h"
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000045#include "ssh.h"
46#include "dh.h"
Damien Millerd7834352006-08-05 12:39:39 +100047#include "buffer.h"
48#include "key.h"
49#include "cipher.h"
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000050#include "kex.h"
Damien Millerd7834352006-08-05 12:39:39 +100051#include "hostfile.h"
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000052#include "auth.h"
Damien Miller06ebedf2003-02-24 12:03:38 +110053#include "auth-options.h"
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000054#include "packet.h"
55#include "mac.h"
56#include "log.h"
Ben Lindstrom036768e2004-04-08 16:12:30 +000057#ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */
58#undef TARGET_OS_MAC
Ben Lindstrom1b9f2a62004-04-08 05:11:03 +000059#include "zlib.h"
Ben Lindstrom036768e2004-04-08 16:12:30 +000060#define TARGET_OS_MAC 1
61#else
62#include "zlib.h"
63#endif
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000064#include "monitor.h"
Damien Millerd7834352006-08-05 12:39:39 +100065#ifdef GSSAPI
66#include "ssh-gss.h"
67#endif
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000068#include "monitor_wrap.h"
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000069#include "atomicio.h"
70#include "monitor_fdpass.h"
Damien Miller3f941882006-03-31 23:13:02 +110071#include "misc.h"
Damien Miller4e448a32003-05-14 15:11:48 +100072#include "servconf.h"
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000073
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000074#include "channels.h"
75#include "session.h"
76
77/* Imports */
78extern int compat20;
79extern Newkeys *newkeys[];
80extern z_stream incoming_stream;
81extern z_stream outgoing_stream;
Ben Lindstrom7339b2a2002-05-15 16:25:01 +000082extern struct monitor *pmonitor;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000083extern Buffer input, output;
Darren Tucker09991742004-07-17 17:05:14 +100084extern Buffer loginmsg;
Damien Miller4e448a32003-05-14 15:11:48 +100085extern ServerOptions options;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000086
Darren Tucker3e33cec2003-10-02 16:12:36 +100087int
88mm_is_monitor(void)
89{
90 /*
91 * m_pid is only set in the privileged part, and
92 * points to the unprivileged child.
93 */
Darren Tuckera47c9bc2003-11-03 20:03:25 +110094 return (pmonitor && pmonitor->m_pid > 0);
Darren Tucker3e33cec2003-10-02 16:12:36 +100095}
96
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000097void
Darren Tucker3f9fdc72004-06-22 12:56:01 +100098mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000099{
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000100 u_int mlen = buffer_len(m);
Ben Lindstromb1bdc5a2002-07-04 00:09:26 +0000101 u_char buf[5];
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000102
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000103 debug3("%s entering: type %d", __func__, type);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000104
Damien Miller3f941882006-03-31 23:13:02 +1100105 put_u32(buf, mlen + 1);
Ben Lindstromcb72e4f2002-06-21 00:41:51 +0000106 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000107 if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
Damien Millerb253cc42005-05-26 12:23:44 +1000108 fatal("%s: write: %s", __func__, strerror(errno));
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000109 if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
Damien Millerb253cc42005-05-26 12:23:44 +1000110 fatal("%s: write: %s", __func__, strerror(errno));
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000111}
112
113void
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000114mm_request_receive(int sock, Buffer *m)
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000115{
116 u_char buf[4];
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000117 u_int msg_len;
118
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000119 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000120
Damien Millerb253cc42005-05-26 12:23:44 +1000121 if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
122 if (errno == EPIPE)
Darren Tucker3e33cec2003-10-02 16:12:36 +1000123 cleanup_exit(255);
Damien Millerb253cc42005-05-26 12:23:44 +1000124 fatal("%s: read: %s", __func__, strerror(errno));
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000125 }
Damien Miller3f941882006-03-31 23:13:02 +1100126 msg_len = get_u32(buf);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000127 if (msg_len > 256 * 1024)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000128 fatal("%s: read: bad msg_len %d", __func__, msg_len);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000129 buffer_clear(m);
130 buffer_append_space(m, msg_len);
Damien Millerb253cc42005-05-26 12:23:44 +1000131 if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
132 fatal("%s: read: %s", __func__, strerror(errno));
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000133}
134
135void
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000136mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000137{
138 u_char rtype;
139
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000140 debug3("%s entering: type %d", __func__, type);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000141
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000142 mm_request_receive(sock, m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000143 rtype = buffer_get_char(m);
144 if (rtype != type)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000145 fatal("%s: read: rtype %d != type %d", __func__,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000146 rtype, type);
147}
148
149DH *
150mm_choose_dh(int min, int nbits, int max)
151{
152 BIGNUM *p, *g;
153 int success = 0;
154 Buffer m;
155
156 buffer_init(&m);
157 buffer_put_int(&m, min);
158 buffer_put_int(&m, nbits);
159 buffer_put_int(&m, max);
160
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000161 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000162
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000163 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000164 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000165
166 success = buffer_get_char(&m);
167 if (success == 0)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000168 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000169
170 if ((p = BN_new()) == NULL)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000171 fatal("%s: BN_new failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000172 if ((g = BN_new()) == NULL)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000173 fatal("%s: BN_new failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000174 buffer_get_bignum2(&m, p);
175 buffer_get_bignum2(&m, g);
176
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000177 debug3("%s: remaining %d", __func__, buffer_len(&m));
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000178 buffer_free(&m);
179
180 return (dh_new_group(g, p));
181}
182
183int
184mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
185{
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000186 Kex *kex = *pmonitor->m_pkex;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000187 Buffer m;
188
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000189 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000190
191 buffer_init(&m);
192 buffer_put_int(&m, kex->host_key_index(key));
193 buffer_put_string(&m, data, datalen);
194
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000195 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000196
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000197 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000198 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000199 *sigp = buffer_get_string(&m, lenp);
200 buffer_free(&m);
201
202 return (0);
203}
204
205struct passwd *
Darren Tuckerb09b6772004-06-22 15:06:46 +1000206mm_getpwnamallow(const char *username)
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000207{
208 Buffer m;
209 struct passwd *pw;
210 u_int pwlen;
211
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000212 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000213
214 buffer_init(&m);
Darren Tuckerb09b6772004-06-22 15:06:46 +1000215 buffer_put_cstring(&m, username);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000216
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000217 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000218
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000219 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000220 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000221
222 if (buffer_get_char(&m) == 0) {
223 buffer_free(&m);
224 return (NULL);
225 }
226 pw = buffer_get_string(&m, &pwlen);
227 if (pwlen != sizeof(struct passwd))
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000228 fatal("%s: struct passwd size mismatch", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000229 pw->pw_name = buffer_get_string(&m, NULL);
230 pw->pw_passwd = buffer_get_string(&m, NULL);
231 pw->pw_gecos = buffer_get_string(&m, NULL);
Kevin Steves7e147602002-03-22 18:07:17 +0000232#ifdef HAVE_PW_CLASS_IN_PASSWD
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000233 pw->pw_class = buffer_get_string(&m, NULL);
Kevin Steves7e147602002-03-22 18:07:17 +0000234#endif
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000235 pw->pw_dir = buffer_get_string(&m, NULL);
236 pw->pw_shell = buffer_get_string(&m, NULL);
237 buffer_free(&m);
238
239 return (pw);
240}
241
Darren Tucker7eb3de02003-10-15 15:56:58 +1000242char *
243mm_auth2_read_banner(void)
Damien Miller5ad9fd92002-05-13 11:07:41 +1000244{
245 Buffer m;
246 char *banner;
247
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000248 debug3("%s entering", __func__);
Damien Miller5ad9fd92002-05-13 11:07:41 +1000249
250 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000251 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
Damien Miller5ad9fd92002-05-13 11:07:41 +1000252 buffer_clear(&m);
253
Darren Tucker7eb3de02003-10-15 15:56:58 +1000254 mm_request_receive_expect(pmonitor->m_recvfd,
255 MONITOR_ANS_AUTH2_READ_BANNER, &m);
Damien Miller5ad9fd92002-05-13 11:07:41 +1000256 banner = buffer_get_string(&m, NULL);
257 buffer_free(&m);
Ben Lindstromcb72e4f2002-06-21 00:41:51 +0000258
Darren Tucker7eb3de02003-10-15 15:56:58 +1000259 /* treat empty banner as missing banner */
260 if (strlen(banner) == 0) {
261 xfree(banner);
262 banner = NULL;
263 }
Damien Miller5ad9fd92002-05-13 11:07:41 +1000264 return (banner);
265}
266
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000267/* Inform the privileged process about service and style */
268
269void
270mm_inform_authserv(char *service, char *style)
271{
272 Buffer m;
273
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000274 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000275
276 buffer_init(&m);
277 buffer_put_cstring(&m, service);
278 buffer_put_cstring(&m, style ? style : "");
279
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000280 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000281
282 buffer_free(&m);
283}
284
285/* Do the password authentication */
286int
287mm_auth_password(Authctxt *authctxt, char *password)
288{
289 Buffer m;
290 int authenticated = 0;
291
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000292 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000293
294 buffer_init(&m);
295 buffer_put_cstring(&m, password);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000296 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000297
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000298 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000299 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000300
301 authenticated = buffer_get_int(&m);
302
303 buffer_free(&m);
304
305 debug3("%s: user %sauthenticated",
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000306 __func__, authenticated ? "" : "not ");
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000307 return (authenticated);
308}
309
310int
311mm_user_key_allowed(struct passwd *pw, Key *key)
312{
313 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
314}
315
316int
317mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
318 Key *key)
319{
320 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
321}
322
323int
324mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
325 char *host, Key *key)
326{
327 int ret;
328
329 key->type = KEY_RSA; /* XXX hack for key_to_blob */
330 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
331 key->type = KEY_RSA1;
332 return (ret);
333}
334
335static void
336mm_send_debug(Buffer *m)
337{
338 char *msg;
339
340 while (buffer_len(m)) {
341 msg = buffer_get_string(m, NULL);
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000342 debug3("%s: Sending debug: %s", __func__, msg);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000343 packet_send_debug("%s", msg);
344 xfree(msg);
345 }
346}
347
348int
349mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
350{
351 Buffer m;
352 u_char *blob;
353 u_int len;
Damien Miller06ebedf2003-02-24 12:03:38 +1100354 int allowed = 0, have_forced = 0;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000355
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000356 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000357
358 /* Convert the key to a blob and the pass it over */
359 if (!key_to_blob(key, &blob, &len))
360 return (0);
361
362 buffer_init(&m);
363 buffer_put_int(&m, type);
364 buffer_put_cstring(&m, user ? user : "");
365 buffer_put_cstring(&m, host ? host : "");
366 buffer_put_string(&m, blob, len);
367 xfree(blob);
368
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000369 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000370
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000371 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000372 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000373
374 allowed = buffer_get_int(&m);
375
Damien Miller06ebedf2003-02-24 12:03:38 +1100376 /* fake forced command */
377 auth_clear_options();
378 have_forced = buffer_get_int(&m);
379 forced_command = have_forced ? xstrdup("true") : NULL;
380
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000381 /* Send potential debug messages */
382 mm_send_debug(&m);
383
384 buffer_free(&m);
385
386 return (allowed);
387}
388
389/*
390 * This key verify needs to send the key type along, because the
391 * privileged parent makes the decision if the key is allowed
392 * for authentication.
393 */
394
395int
396mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
397{
398 Buffer m;
399 u_char *blob;
400 u_int len;
401 int verified = 0;
402
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000403 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000404
405 /* Convert the key to a blob and the pass it over */
406 if (!key_to_blob(key, &blob, &len))
407 return (0);
408
409 buffer_init(&m);
410 buffer_put_string(&m, blob, len);
411 buffer_put_string(&m, sig, siglen);
412 buffer_put_string(&m, data, datalen);
413 xfree(blob);
414
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000415 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000416
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000417 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000418 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000419
420 verified = buffer_get_int(&m);
421
422 buffer_free(&m);
423
424 return (verified);
425}
426
427/* Export key state after authentication */
428Newkeys *
429mm_newkeys_from_blob(u_char *blob, int blen)
430{
431 Buffer b;
432 u_int len;
433 Newkeys *newkey = NULL;
434 Enc *enc;
435 Mac *mac;
436 Comp *comp;
437
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000438 debug3("%s: %p(%d)", __func__, blob, blen);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000439#ifdef DEBUG_PK
440 dump_base64(stderr, blob, blen);
441#endif
442 buffer_init(&b);
443 buffer_append(&b, blob, blen);
444
445 newkey = xmalloc(sizeof(*newkey));
446 enc = &newkey->enc;
447 mac = &newkey->mac;
448 comp = &newkey->comp;
449
450 /* Enc structure */
451 enc->name = buffer_get_string(&b, NULL);
452 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
453 enc->enabled = buffer_get_int(&b);
454 enc->block_size = buffer_get_int(&b);
455 enc->key = buffer_get_string(&b, &enc->key_len);
456 enc->iv = buffer_get_string(&b, &len);
457 if (len != enc->block_size)
Ben Lindstrom08512492002-06-27 00:23:02 +0000458 fatal("%s: bad ivlen: expected %u != %u", __func__,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000459 enc->block_size, len);
460
461 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000462 fatal("%s: bad cipher name %s or pointer %p", __func__,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000463 enc->name, enc->cipher);
464
465 /* Mac structure */
466 mac->name = buffer_get_string(&b, NULL);
467 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000468 fatal("%s: can not init mac %s", __func__, mac->name);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000469 mac->enabled = buffer_get_int(&b);
470 mac->key = buffer_get_string(&b, &len);
471 if (len > mac->key_len)
Ben Lindstrom08512492002-06-27 00:23:02 +0000472 fatal("%s: bad mac key length: %u > %d", __func__, len,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000473 mac->key_len);
474 mac->key_len = len;
475
476 /* Comp structure */
477 comp->type = buffer_get_int(&b);
478 comp->enabled = buffer_get_int(&b);
479 comp->name = buffer_get_string(&b, NULL);
480
481 len = buffer_len(&b);
482 if (len != 0)
Ben Lindstrom08512492002-06-27 00:23:02 +0000483 error("newkeys_from_blob: remaining bytes in blob %u", len);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000484 buffer_free(&b);
485 return (newkey);
486}
487
488int
489mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
490{
491 Buffer b;
492 int len;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000493 Enc *enc;
494 Mac *mac;
495 Comp *comp;
496 Newkeys *newkey = newkeys[mode];
497
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000498 debug3("%s: converting %p", __func__, newkey);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000499
500 if (newkey == NULL) {
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000501 error("%s: newkey == NULL", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000502 return 0;
503 }
504 enc = &newkey->enc;
505 mac = &newkey->mac;
506 comp = &newkey->comp;
507
508 buffer_init(&b);
509 /* Enc structure */
510 buffer_put_cstring(&b, enc->name);
511 /* The cipher struct is constant and shared, you export pointer */
512 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
513 buffer_put_int(&b, enc->enabled);
514 buffer_put_int(&b, enc->block_size);
515 buffer_put_string(&b, enc->key, enc->key_len);
516 packet_get_keyiv(mode, enc->iv, enc->block_size);
517 buffer_put_string(&b, enc->iv, enc->block_size);
518
519 /* Mac structure */
520 buffer_put_cstring(&b, mac->name);
521 buffer_put_int(&b, mac->enabled);
522 buffer_put_string(&b, mac->key, mac->key_len);
523
524 /* Comp structure */
525 buffer_put_int(&b, comp->type);
526 buffer_put_int(&b, comp->enabled);
527 buffer_put_cstring(&b, comp->name);
528
529 len = buffer_len(&b);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000530 if (lenp != NULL)
531 *lenp = len;
Ben Lindstrom2bf759c2002-07-07 22:13:31 +0000532 if (blobp != NULL) {
533 *blobp = xmalloc(len);
534 memcpy(*blobp, buffer_ptr(&b), len);
535 }
536 memset(buffer_ptr(&b), 0, len);
537 buffer_free(&b);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000538 return len;
539}
540
541static void
542mm_send_kex(Buffer *m, Kex *kex)
543{
544 buffer_put_string(m, kex->session_id, kex->session_id_len);
545 buffer_put_int(m, kex->we_need);
546 buffer_put_int(m, kex->hostkey_type);
547 buffer_put_int(m, kex->kex_type);
548 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
549 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
550 buffer_put_int(m, kex->flags);
551 buffer_put_cstring(m, kex->client_version_string);
552 buffer_put_cstring(m, kex->server_version_string);
553}
554
555void
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000556mm_send_keystate(struct monitor *monitor)
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000557{
558 Buffer m;
559 u_char *blob, *p;
560 u_int bloblen, plen;
Damien Millera5539d22003-04-09 20:50:06 +1000561 u_int32_t seqnr, packets;
562 u_int64_t blocks;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000563
564 buffer_init(&m);
565
566 if (!compat20) {
567 u_char iv[24];
Ben Lindstrom402c6cc2002-06-21 00:43:42 +0000568 u_char *key;
569 u_int ivlen, keylen;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000570
571 buffer_put_int(&m, packet_get_protocol_flags());
572
573 buffer_put_int(&m, packet_get_ssh1_cipher());
574
Ben Lindstrom402c6cc2002-06-21 00:43:42 +0000575 debug3("%s: Sending ssh1 KEY+IV", __func__);
576 keylen = packet_get_encryption_key(NULL);
577 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
578 keylen = packet_get_encryption_key(key);
579 buffer_put_string(&m, key, keylen);
580 memset(key, 0, keylen);
581 xfree(key);
582
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000583 ivlen = packet_get_keyiv_len(MODE_OUT);
584 packet_get_keyiv(MODE_OUT, iv, ivlen);
585 buffer_put_string(&m, iv, ivlen);
586 ivlen = packet_get_keyiv_len(MODE_OUT);
587 packet_get_keyiv(MODE_IN, iv, ivlen);
588 buffer_put_string(&m, iv, ivlen);
589 goto skip;
590 } else {
591 /* Kex for rekeying */
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000592 mm_send_kex(&m, *monitor->m_pkex);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000593 }
594
595 debug3("%s: Sending new keys: %p %p",
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000596 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000597
598 /* Keys from Kex */
599 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000600 fatal("%s: conversion of newkeys failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000601
602 buffer_put_string(&m, blob, bloblen);
603 xfree(blob);
604
605 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000606 fatal("%s: conversion of newkeys failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000607
608 buffer_put_string(&m, blob, bloblen);
609 xfree(blob);
610
Damien Millera5539d22003-04-09 20:50:06 +1000611 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
612 buffer_put_int(&m, seqnr);
613 buffer_put_int64(&m, blocks);
614 buffer_put_int(&m, packets);
Damien Millerb1ecd9c2003-04-09 20:51:24 +1000615 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
Damien Millera5539d22003-04-09 20:50:06 +1000616 buffer_put_int(&m, seqnr);
617 buffer_put_int64(&m, blocks);
618 buffer_put_int(&m, packets);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000619
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000620 debug3("%s: New keys have been sent", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000621 skip:
622 /* More key context */
623 plen = packet_get_keycontext(MODE_OUT, NULL);
624 p = xmalloc(plen+1);
625 packet_get_keycontext(MODE_OUT, p);
626 buffer_put_string(&m, p, plen);
627 xfree(p);
628
629 plen = packet_get_keycontext(MODE_IN, NULL);
630 p = xmalloc(plen+1);
631 packet_get_keycontext(MODE_IN, p);
632 buffer_put_string(&m, p, plen);
633 xfree(p);
634
635 /* Compression state */
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000636 debug3("%s: Sending compression state", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000637 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
638 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
639
640 /* Network I/O buffers */
641 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
642 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
643
Darren Tucker3f9fdc72004-06-22 12:56:01 +1000644 mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000645 debug3("%s: Finished sending state", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000646
647 buffer_free(&m);
648}
649
650int
Damien Miller71a73672006-03-26 14:04:36 +1100651mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000652{
653 Buffer m;
Darren Tucker09991742004-07-17 17:05:14 +1000654 char *p, *msg;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000655 int success = 0;
656
657 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000658 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000659
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000660 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000661 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000662
663 success = buffer_get_int(&m);
664 if (success == 0) {
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000665 debug3("%s: pty alloc failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000666 buffer_free(&m);
667 return (0);
668 }
669 p = buffer_get_string(&m, NULL);
Darren Tucker09991742004-07-17 17:05:14 +1000670 msg = buffer_get_string(&m, NULL);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000671 buffer_free(&m);
672
673 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
674 xfree(p);
675
Darren Tucker09991742004-07-17 17:05:14 +1000676 buffer_append(&loginmsg, msg, strlen(msg));
677 xfree(msg);
678
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000679 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
680 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000681
682 /* Success */
683 return (1);
684}
685
686void
Darren Tucker3e33cec2003-10-02 16:12:36 +1000687mm_session_pty_cleanup2(Session *s)
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000688{
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000689 Buffer m;
690
691 if (s->ttyfd == -1)
692 return;
693 buffer_init(&m);
694 buffer_put_cstring(&m, s->tty);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000695 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000696 buffer_free(&m);
697
698 /* closed dup'ed master */
699 if (close(s->ptymaster) < 0)
700 error("close(s->ptymaster): %s", strerror(errno));
701
702 /* unlink pty from session */
703 s->ttyfd = -1;
704}
705
Damien Miller79418552002-04-23 20:28:48 +1000706#ifdef USE_PAM
707void
Darren Tuckerdbf7a742004-03-08 23:04:06 +1100708mm_start_pam(Authctxt *authctxt)
Damien Miller79418552002-04-23 20:28:48 +1000709{
710 Buffer m;
711
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000712 debug3("%s entering", __func__);
Damien Miller4e448a32003-05-14 15:11:48 +1000713 if (!options.use_pam)
714 fatal("UsePAM=no, but ended up in %s anyway", __func__);
Damien Miller79418552002-04-23 20:28:48 +1000715
716 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000717 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
Damien Miller79418552002-04-23 20:28:48 +1000718
719 buffer_free(&m);
720}
Damien Miller4f9f42a2003-05-10 19:28:02 +1000721
Damien Miller1f499fd2003-08-25 13:08:49 +1000722u_int
723mm_do_pam_account(void)
724{
725 Buffer m;
726 u_int ret;
Darren Tucker77fc29e2004-09-11 23:07:03 +1000727 char *msg;
Damien Miller1f499fd2003-08-25 13:08:49 +1000728
729 debug3("%s entering", __func__);
730 if (!options.use_pam)
731 fatal("UsePAM=no, but ended up in %s anyway", __func__);
732
733 buffer_init(&m);
734 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
735
Damien Millera8e06ce2003-11-21 23:48:55 +1100736 mm_request_receive_expect(pmonitor->m_recvfd,
Damien Miller1f499fd2003-08-25 13:08:49 +1000737 MONITOR_ANS_PAM_ACCOUNT, &m);
738 ret = buffer_get_int(&m);
Darren Tucker77fc29e2004-09-11 23:07:03 +1000739 msg = buffer_get_string(&m, NULL);
740 buffer_append(&loginmsg, msg, strlen(msg));
741 xfree(msg);
Damien Miller1f499fd2003-08-25 13:08:49 +1000742
743 buffer_free(&m);
Damien Miller787b2ec2003-11-21 23:56:47 +1100744
Damien Miller1f499fd2003-08-25 13:08:49 +1000745 debug3("%s returning %d", __func__, ret);
746
747 return (ret);
748}
749
Damien Miller4f9f42a2003-05-10 19:28:02 +1000750void *
751mm_sshpam_init_ctx(Authctxt *authctxt)
752{
753 Buffer m;
754 int success;
755
756 debug3("%s", __func__);
757 buffer_init(&m);
758 buffer_put_cstring(&m, authctxt->user);
759 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
760 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
761 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
762 success = buffer_get_int(&m);
763 if (success == 0) {
764 debug3("%s: pam_init_ctx failed", __func__);
765 buffer_free(&m);
766 return (NULL);
767 }
768 buffer_free(&m);
769 return (authctxt);
770}
771
772int
773mm_sshpam_query(void *ctx, char **name, char **info,
774 u_int *num, char ***prompts, u_int **echo_on)
775{
776 Buffer m;
Damien Miller04b65332005-07-17 17:53:31 +1000777 u_int i;
778 int ret;
Damien Miller4f9f42a2003-05-10 19:28:02 +1000779
780 debug3("%s", __func__);
781 buffer_init(&m);
782 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
783 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
784 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
785 ret = buffer_get_int(&m);
786 debug3("%s: pam_query returned %d", __func__, ret);
787 *name = buffer_get_string(&m, NULL);
788 *info = buffer_get_string(&m, NULL);
789 *num = buffer_get_int(&m);
Darren Tuckerd8093e42006-05-04 16:24:34 +1000790 if (*num > PAM_MAX_NUM_MSG)
791 fatal("%s: recieved %u PAM messages, expected <= %u",
792 __func__, *num, PAM_MAX_NUM_MSG);
793 *prompts = xcalloc((*num + 1), sizeof(char *));
794 *echo_on = xcalloc((*num + 1), sizeof(u_int));
Damien Miller4f9f42a2003-05-10 19:28:02 +1000795 for (i = 0; i < *num; ++i) {
796 (*prompts)[i] = buffer_get_string(&m, NULL);
797 (*echo_on)[i] = buffer_get_int(&m);
798 }
799 buffer_free(&m);
800 return (ret);
801}
802
803int
804mm_sshpam_respond(void *ctx, u_int num, char **resp)
805{
806 Buffer m;
Damien Miller04b65332005-07-17 17:53:31 +1000807 u_int i;
808 int ret;
Damien Miller4f9f42a2003-05-10 19:28:02 +1000809
810 debug3("%s", __func__);
811 buffer_init(&m);
812 buffer_put_int(&m, num);
813 for (i = 0; i < num; ++i)
814 buffer_put_cstring(&m, resp[i]);
815 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
816 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
817 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
818 ret = buffer_get_int(&m);
819 debug3("%s: pam_respond returned %d", __func__, ret);
820 buffer_free(&m);
821 return (ret);
822}
823
824void
825mm_sshpam_free_ctx(void *ctxtp)
826{
827 Buffer m;
828
829 debug3("%s", __func__);
830 buffer_init(&m);
831 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
832 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
833 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
834 buffer_free(&m);
835}
Damien Miller79418552002-04-23 20:28:48 +1000836#endif /* USE_PAM */
837
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000838/* Request process termination */
839
840void
841mm_terminate(void)
842{
843 Buffer m;
844
845 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000846 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000847 buffer_free(&m);
848}
849
850int
851mm_ssh1_session_key(BIGNUM *num)
852{
853 int rsafail;
854 Buffer m;
855
856 buffer_init(&m);
857 buffer_put_bignum2(&m, num);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000858 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000859
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000860 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000861
862 rsafail = buffer_get_int(&m);
863 buffer_get_bignum2(&m, num);
864
865 buffer_free(&m);
866
867 return (rsafail);
868}
869
870static void
871mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
872 char ***prompts, u_int **echo_on)
873{
Ben Lindstromcb72e4f2002-06-21 00:41:51 +0000874 *name = xstrdup("");
875 *infotxt = xstrdup("");
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000876 *numprompts = 1;
Damien Miller07d86be2006-03-26 14:19:21 +1100877 *prompts = xcalloc(*numprompts, sizeof(char *));
878 *echo_on = xcalloc(*numprompts, sizeof(u_int));
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000879 (*echo_on)[0] = 0;
880}
881
882int
883mm_bsdauth_query(void *ctx, char **name, char **infotxt,
884 u_int *numprompts, char ***prompts, u_int **echo_on)
885{
886 Buffer m;
Damien Millerb7df3af2003-02-24 11:55:46 +1100887 u_int success;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000888 char *challenge;
889
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000890 debug3("%s: entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000891
892 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000893 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000894
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000895 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000896 &m);
Damien Millerb7df3af2003-02-24 11:55:46 +1100897 success = buffer_get_int(&m);
898 if (success == 0) {
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000899 debug3("%s: no challenge", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000900 buffer_free(&m);
901 return (-1);
902 }
903
904 /* Get the challenge, and format the response */
905 challenge = buffer_get_string(&m, NULL);
906 buffer_free(&m);
907
908 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
909 (*prompts)[0] = challenge;
910
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000911 debug3("%s: received challenge: %s", __func__, challenge);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000912
913 return (0);
914}
915
916int
917mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
918{
919 Buffer m;
920 int authok;
921
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000922 debug3("%s: entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000923 if (numresponses != 1)
924 return (-1);
925
926 buffer_init(&m);
927 buffer_put_cstring(&m, responses[0]);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000928 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000929
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000930 mm_request_receive_expect(pmonitor->m_recvfd,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000931 MONITOR_ANS_BSDAUTHRESPOND, &m);
932
933 authok = buffer_get_int(&m);
934 buffer_free(&m);
935
936 return ((authok == 0) ? -1 : 0);
937}
938
Darren Tucker042e2e82004-07-08 23:09:42 +1000939#ifdef SKEY
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000940int
941mm_skey_query(void *ctx, char **name, char **infotxt,
942 u_int *numprompts, char ***prompts, u_int **echo_on)
943{
944 Buffer m;
Damien Millerb7df3af2003-02-24 11:55:46 +1100945 u_int success;
Darren Tuckerd6a23f22006-08-05 18:50:35 +1000946 char *challenge;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000947
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000948 debug3("%s: entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000949
950 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000951 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000952
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000953 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000954 &m);
Damien Millerb7df3af2003-02-24 11:55:46 +1100955 success = buffer_get_int(&m);
956 if (success == 0) {
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000957 debug3("%s: no challenge", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000958 buffer_free(&m);
959 return (-1);
960 }
961
962 /* Get the challenge, and format the response */
963 challenge = buffer_get_string(&m, NULL);
964 buffer_free(&m);
965
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000966 debug3("%s: received challenge: %s", __func__, challenge);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000967
968 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
969
Damien Miller07d86be2006-03-26 14:19:21 +1100970 xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000971 xfree(challenge);
972
973 return (0);
974}
975
976int
977mm_skey_respond(void *ctx, u_int numresponses, char **responses)
978{
979 Buffer m;
980 int authok;
981
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000982 debug3("%s: entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000983 if (numresponses != 1)
984 return (-1);
985
986 buffer_init(&m);
987 buffer_put_cstring(&m, responses[0]);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000988 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000989
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000990 mm_request_receive_expect(pmonitor->m_recvfd,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000991 MONITOR_ANS_SKEYRESPOND, &m);
992
993 authok = buffer_get_int(&m);
994 buffer_free(&m);
995
996 return ((authok == 0) ? -1 : 0);
997}
Darren Tucker042e2e82004-07-08 23:09:42 +1000998#endif /* SKEY */
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000999
1000void
1001mm_ssh1_session_id(u_char session_id[16])
1002{
1003 Buffer m;
1004 int i;
1005
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001006 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001007
1008 buffer_init(&m);
1009 for (i = 0; i < 16; i++)
1010 buffer_put_char(&m, session_id[i]);
1011
Ben Lindstrom7339b2a2002-05-15 16:25:01 +00001012 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001013 buffer_free(&m);
1014}
1015
1016int
1017mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1018{
1019 Buffer m;
1020 Key *key;
1021 u_char *blob;
1022 u_int blen;
Damien Miller06ebedf2003-02-24 12:03:38 +11001023 int allowed = 0, have_forced = 0;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001024
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001025 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001026
1027 buffer_init(&m);
1028 buffer_put_bignum2(&m, client_n);
1029
Ben Lindstrom7339b2a2002-05-15 16:25:01 +00001030 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1031 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001032
1033 allowed = buffer_get_int(&m);
1034
Damien Miller06ebedf2003-02-24 12:03:38 +11001035 /* fake forced command */
1036 auth_clear_options();
1037 have_forced = buffer_get_int(&m);
1038 forced_command = have_forced ? xstrdup("true") : NULL;
1039
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001040 if (allowed && rkey != NULL) {
1041 blob = buffer_get_string(&m, &blen);
1042 if ((key = key_from_blob(blob, blen)) == NULL)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001043 fatal("%s: key_from_blob failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001044 *rkey = key;
1045 xfree(blob);
1046 }
1047 mm_send_debug(&m);
1048 buffer_free(&m);
1049
1050 return (allowed);
1051}
1052
1053BIGNUM *
1054mm_auth_rsa_generate_challenge(Key *key)
1055{
1056 Buffer m;
1057 BIGNUM *challenge;
1058 u_char *blob;
1059 u_int blen;
1060
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001061 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001062
1063 if ((challenge = BN_new()) == NULL)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001064 fatal("%s: BN_new failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001065
1066 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1067 if (key_to_blob(key, &blob, &blen) == 0)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001068 fatal("%s: key_to_blob failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001069 key->type = KEY_RSA1;
1070
1071 buffer_init(&m);
1072 buffer_put_string(&m, blob, blen);
1073 xfree(blob);
1074
Ben Lindstrom7339b2a2002-05-15 16:25:01 +00001075 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1076 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001077
1078 buffer_get_bignum2(&m, challenge);
1079 buffer_free(&m);
1080
1081 return (challenge);
1082}
1083
1084int
1085mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1086{
1087 Buffer m;
1088 u_char *blob;
1089 u_int blen;
1090 int success = 0;
1091
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001092 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001093
1094 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1095 if (key_to_blob(key, &blob, &blen) == 0)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001096 fatal("%s: key_to_blob failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001097 key->type = KEY_RSA1;
1098
1099 buffer_init(&m);
1100 buffer_put_string(&m, blob, blen);
1101 buffer_put_string(&m, response, 16);
1102 xfree(blob);
1103
Ben Lindstrom7339b2a2002-05-15 16:25:01 +00001104 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1105 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001106
1107 success = buffer_get_int(&m);
1108 buffer_free(&m);
1109
1110 return (success);
1111}
Damien Miller25162f22002-09-12 09:47:29 +10001112
Darren Tucker2e0cf0d2005-02-08 21:52:47 +11001113#ifdef SSH_AUDIT_EVENTS
Darren Tucker269a1ea2005-02-03 00:20:53 +11001114void
1115mm_audit_event(ssh_audit_event_t event)
1116{
1117 Buffer m;
1118
1119 debug3("%s entering", __func__);
1120
1121 buffer_init(&m);
1122 buffer_put_int(&m, event);
1123
1124 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1125 buffer_free(&m);
1126}
1127
1128void
1129mm_audit_run_command(const char *command)
1130{
1131 Buffer m;
1132
1133 debug3("%s entering command %s", __func__, command);
1134
1135 buffer_init(&m);
1136 buffer_put_cstring(&m, command);
1137
1138 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1139 buffer_free(&m);
1140}
Darren Tucker2e0cf0d2005-02-08 21:52:47 +11001141#endif /* SSH_AUDIT_EVENTS */
Darren Tucker269a1ea2005-02-03 00:20:53 +11001142
Darren Tucker0efd1552003-08-26 11:49:55 +10001143#ifdef GSSAPI
1144OM_uint32
Darren Tucker3f9fdc72004-06-22 12:56:01 +10001145mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
Darren Tucker0efd1552003-08-26 11:49:55 +10001146{
1147 Buffer m;
1148 OM_uint32 major;
1149
1150 /* Client doesn't get to see the context */
1151 *ctx = NULL;
1152
1153 buffer_init(&m);
Darren Tucker3f9fdc72004-06-22 12:56:01 +10001154 buffer_put_string(&m, goid->elements, goid->length);
Darren Tucker0efd1552003-08-26 11:49:55 +10001155
1156 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1157 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1158
1159 major = buffer_get_int(&m);
1160
1161 buffer_free(&m);
1162 return (major);
1163}
1164
1165OM_uint32
1166mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1167 gss_buffer_desc *out, OM_uint32 *flags)
1168{
1169 Buffer m;
1170 OM_uint32 major;
Darren Tucker600ad8d2003-08-26 12:10:48 +10001171 u_int len;
Darren Tucker0efd1552003-08-26 11:49:55 +10001172
1173 buffer_init(&m);
1174 buffer_put_string(&m, in->value, in->length);
1175
1176 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1177 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1178
1179 major = buffer_get_int(&m);
Darren Tucker600ad8d2003-08-26 12:10:48 +10001180 out->value = buffer_get_string(&m, &len);
1181 out->length = len;
Darren Tucker0efd1552003-08-26 11:49:55 +10001182 if (flags)
1183 *flags = buffer_get_int(&m);
1184
1185 buffer_free(&m);
1186
1187 return (major);
1188}
1189
Damien Miller0425d402003-11-17 22:18:21 +11001190OM_uint32
1191mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1192{
1193 Buffer m;
1194 OM_uint32 major;
1195
1196 buffer_init(&m);
1197 buffer_put_string(&m, gssbuf->value, gssbuf->length);
1198 buffer_put_string(&m, gssmic->value, gssmic->length);
1199
1200 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1201 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1202 &m);
1203
1204 major = buffer_get_int(&m);
1205 buffer_free(&m);
1206 return(major);
1207}
1208
Darren Tucker0efd1552003-08-26 11:49:55 +10001209int
1210mm_ssh_gssapi_userok(char *user)
1211{
1212 Buffer m;
1213 int authenticated = 0;
1214
1215 buffer_init(&m);
1216
1217 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1218 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1219 &m);
1220
1221 authenticated = buffer_get_int(&m);
1222
1223 buffer_free(&m);
1224 debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1225 return (authenticated);
1226}
1227#endif /* GSSAPI */