blob: bd3a01a2bab4a0bb2f219207d6cca19ca12c4e02 [file] [log] [blame]
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001/*
2 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
3 * Copyright 2002 Markus Friedl <markus@openbsd.org>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#include "includes.h"
Damien Millerb1ecd9c2003-04-09 20:51:24 +100028RCSID("$OpenBSD: monitor_wrap.c,v 1.26 2003/04/07 08:29:57 markus Exp $");
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000029
30#include <openssl/bn.h>
31#include <openssl/dh.h>
32
33#include "ssh.h"
34#include "dh.h"
35#include "kex.h"
36#include "auth.h"
Damien Miller06ebedf2003-02-24 12:03:38 +110037#include "auth-options.h"
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000038#include "buffer.h"
39#include "bufaux.h"
40#include "packet.h"
41#include "mac.h"
42#include "log.h"
43#include "zlib.h"
44#include "monitor.h"
45#include "monitor_wrap.h"
46#include "xmalloc.h"
47#include "atomicio.h"
48#include "monitor_fdpass.h"
49#include "getput.h"
Damien Miller4e448a32003-05-14 15:11:48 +100050#include "servconf.h"
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000051
52#include "auth.h"
53#include "channels.h"
54#include "session.h"
55
56/* Imports */
57extern int compat20;
58extern Newkeys *newkeys[];
59extern z_stream incoming_stream;
60extern z_stream outgoing_stream;
Ben Lindstrom7339b2a2002-05-15 16:25:01 +000061extern struct monitor *pmonitor;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000062extern Buffer input, output;
Damien Miller4e448a32003-05-14 15:11:48 +100063extern ServerOptions options;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000064
65void
66mm_request_send(int socket, enum monitor_reqtype type, Buffer *m)
67{
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000068 u_int mlen = buffer_len(m);
Ben Lindstromb1bdc5a2002-07-04 00:09:26 +000069 u_char buf[5];
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000070
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +000071 debug3("%s entering: type %d", __func__, type);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000072
73 PUT_32BIT(buf, mlen + 1);
Ben Lindstromcb72e4f2002-06-21 00:41:51 +000074 buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000075 if (atomicio(write, socket, buf, sizeof(buf)) != sizeof(buf))
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +000076 fatal("%s: write", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000077 if (atomicio(write, socket, buffer_ptr(m), mlen) != mlen)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +000078 fatal("%s: write", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000079}
80
81void
82mm_request_receive(int socket, Buffer *m)
83{
84 u_char buf[4];
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000085 u_int msg_len;
Ben Lindstromb1bdc5a2002-07-04 00:09:26 +000086 ssize_t res;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000087
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +000088 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000089
90 res = atomicio(read, socket, buf, sizeof(buf));
91 if (res != sizeof(buf)) {
92 if (res == 0)
93 fatal_cleanup();
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +000094 fatal("%s: read: %ld", __func__, (long)res);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000095 }
96 msg_len = GET_32BIT(buf);
97 if (msg_len > 256 * 1024)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +000098 fatal("%s: read: bad msg_len %d", __func__, msg_len);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +000099 buffer_clear(m);
100 buffer_append_space(m, msg_len);
101 res = atomicio(read, socket, buffer_ptr(m), msg_len);
102 if (res != msg_len)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000103 fatal("%s: read: %ld != msg_len", __func__, (long)res);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000104}
105
106void
107mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m)
108{
109 u_char rtype;
110
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000111 debug3("%s entering: type %d", __func__, type);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000112
113 mm_request_receive(socket, m);
114 rtype = buffer_get_char(m);
115 if (rtype != type)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000116 fatal("%s: read: rtype %d != type %d", __func__,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000117 rtype, type);
118}
119
120DH *
121mm_choose_dh(int min, int nbits, int max)
122{
123 BIGNUM *p, *g;
124 int success = 0;
125 Buffer m;
126
127 buffer_init(&m);
128 buffer_put_int(&m, min);
129 buffer_put_int(&m, nbits);
130 buffer_put_int(&m, max);
131
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000132 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000133
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000134 debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000135 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000136
137 success = buffer_get_char(&m);
138 if (success == 0)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000139 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000140
141 if ((p = BN_new()) == NULL)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000142 fatal("%s: BN_new failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000143 if ((g = BN_new()) == NULL)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000144 fatal("%s: BN_new failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000145 buffer_get_bignum2(&m, p);
146 buffer_get_bignum2(&m, g);
147
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000148 debug3("%s: remaining %d", __func__, buffer_len(&m));
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000149 buffer_free(&m);
150
151 return (dh_new_group(g, p));
152}
153
154int
155mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
156{
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000157 Kex *kex = *pmonitor->m_pkex;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000158 Buffer m;
159
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000160 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000161
162 buffer_init(&m);
163 buffer_put_int(&m, kex->host_key_index(key));
164 buffer_put_string(&m, data, datalen);
165
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000166 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000167
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000168 debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000169 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000170 *sigp = buffer_get_string(&m, lenp);
171 buffer_free(&m);
172
173 return (0);
174}
175
176struct passwd *
177mm_getpwnamallow(const char *login)
178{
179 Buffer m;
180 struct passwd *pw;
181 u_int pwlen;
182
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000183 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000184
185 buffer_init(&m);
186 buffer_put_cstring(&m, login);
187
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000188 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000189
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000190 debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000191 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000192
193 if (buffer_get_char(&m) == 0) {
194 buffer_free(&m);
195 return (NULL);
196 }
197 pw = buffer_get_string(&m, &pwlen);
198 if (pwlen != sizeof(struct passwd))
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000199 fatal("%s: struct passwd size mismatch", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000200 pw->pw_name = buffer_get_string(&m, NULL);
201 pw->pw_passwd = buffer_get_string(&m, NULL);
202 pw->pw_gecos = buffer_get_string(&m, NULL);
Kevin Steves7e147602002-03-22 18:07:17 +0000203#ifdef HAVE_PW_CLASS_IN_PASSWD
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000204 pw->pw_class = buffer_get_string(&m, NULL);
Kevin Steves7e147602002-03-22 18:07:17 +0000205#endif
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000206 pw->pw_dir = buffer_get_string(&m, NULL);
207 pw->pw_shell = buffer_get_string(&m, NULL);
208 buffer_free(&m);
209
210 return (pw);
211}
212
Ben Lindstroma962c2f2002-07-04 00:14:17 +0000213char *mm_auth2_read_banner(void)
Damien Miller5ad9fd92002-05-13 11:07:41 +1000214{
215 Buffer m;
216 char *banner;
217
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000218 debug3("%s entering", __func__);
Damien Miller5ad9fd92002-05-13 11:07:41 +1000219
220 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000221 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
Damien Miller5ad9fd92002-05-13 11:07:41 +1000222 buffer_clear(&m);
223
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000224 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTH2_READ_BANNER, &m);
Damien Miller5ad9fd92002-05-13 11:07:41 +1000225 banner = buffer_get_string(&m, NULL);
226 buffer_free(&m);
Ben Lindstromcb72e4f2002-06-21 00:41:51 +0000227
Damien Miller5ad9fd92002-05-13 11:07:41 +1000228 return (banner);
229}
230
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000231/* Inform the privileged process about service and style */
232
233void
234mm_inform_authserv(char *service, char *style)
235{
236 Buffer m;
237
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000238 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000239
240 buffer_init(&m);
241 buffer_put_cstring(&m, service);
242 buffer_put_cstring(&m, style ? style : "");
243
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000244 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000245
246 buffer_free(&m);
247}
248
249/* Do the password authentication */
250int
251mm_auth_password(Authctxt *authctxt, char *password)
252{
253 Buffer m;
254 int authenticated = 0;
255
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000256 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000257
258 buffer_init(&m);
259 buffer_put_cstring(&m, password);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000260 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000261
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000262 debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000263 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000264
265 authenticated = buffer_get_int(&m);
266
267 buffer_free(&m);
268
269 debug3("%s: user %sauthenticated",
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000270 __func__, authenticated ? "" : "not ");
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000271 return (authenticated);
272}
273
274int
275mm_user_key_allowed(struct passwd *pw, Key *key)
276{
277 return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
278}
279
280int
281mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
282 Key *key)
283{
284 return (mm_key_allowed(MM_HOSTKEY, user, host, key));
285}
286
287int
288mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
289 char *host, Key *key)
290{
291 int ret;
292
293 key->type = KEY_RSA; /* XXX hack for key_to_blob */
294 ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
295 key->type = KEY_RSA1;
296 return (ret);
297}
298
299static void
300mm_send_debug(Buffer *m)
301{
302 char *msg;
303
304 while (buffer_len(m)) {
305 msg = buffer_get_string(m, NULL);
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000306 debug3("%s: Sending debug: %s", __func__, msg);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000307 packet_send_debug("%s", msg);
308 xfree(msg);
309 }
310}
311
312int
313mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
314{
315 Buffer m;
316 u_char *blob;
317 u_int len;
Damien Miller06ebedf2003-02-24 12:03:38 +1100318 int allowed = 0, have_forced = 0;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000319
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000320 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000321
322 /* Convert the key to a blob and the pass it over */
323 if (!key_to_blob(key, &blob, &len))
324 return (0);
325
326 buffer_init(&m);
327 buffer_put_int(&m, type);
328 buffer_put_cstring(&m, user ? user : "");
329 buffer_put_cstring(&m, host ? host : "");
330 buffer_put_string(&m, blob, len);
331 xfree(blob);
332
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000333 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000334
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000335 debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000336 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000337
338 allowed = buffer_get_int(&m);
339
Damien Miller06ebedf2003-02-24 12:03:38 +1100340 /* fake forced command */
341 auth_clear_options();
342 have_forced = buffer_get_int(&m);
343 forced_command = have_forced ? xstrdup("true") : NULL;
344
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000345 /* Send potential debug messages */
346 mm_send_debug(&m);
347
348 buffer_free(&m);
349
350 return (allowed);
351}
352
353/*
354 * This key verify needs to send the key type along, because the
355 * privileged parent makes the decision if the key is allowed
356 * for authentication.
357 */
358
359int
360mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
361{
362 Buffer m;
363 u_char *blob;
364 u_int len;
365 int verified = 0;
366
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000367 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000368
369 /* Convert the key to a blob and the pass it over */
370 if (!key_to_blob(key, &blob, &len))
371 return (0);
372
373 buffer_init(&m);
374 buffer_put_string(&m, blob, len);
375 buffer_put_string(&m, sig, siglen);
376 buffer_put_string(&m, data, datalen);
377 xfree(blob);
378
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000379 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000380
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000381 debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000382 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000383
384 verified = buffer_get_int(&m);
385
386 buffer_free(&m);
387
388 return (verified);
389}
390
391/* Export key state after authentication */
392Newkeys *
393mm_newkeys_from_blob(u_char *blob, int blen)
394{
395 Buffer b;
396 u_int len;
397 Newkeys *newkey = NULL;
398 Enc *enc;
399 Mac *mac;
400 Comp *comp;
401
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000402 debug3("%s: %p(%d)", __func__, blob, blen);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000403#ifdef DEBUG_PK
404 dump_base64(stderr, blob, blen);
405#endif
406 buffer_init(&b);
407 buffer_append(&b, blob, blen);
408
409 newkey = xmalloc(sizeof(*newkey));
410 enc = &newkey->enc;
411 mac = &newkey->mac;
412 comp = &newkey->comp;
413
414 /* Enc structure */
415 enc->name = buffer_get_string(&b, NULL);
416 buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
417 enc->enabled = buffer_get_int(&b);
418 enc->block_size = buffer_get_int(&b);
419 enc->key = buffer_get_string(&b, &enc->key_len);
420 enc->iv = buffer_get_string(&b, &len);
421 if (len != enc->block_size)
Ben Lindstrom08512492002-06-27 00:23:02 +0000422 fatal("%s: bad ivlen: expected %u != %u", __func__,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000423 enc->block_size, len);
424
425 if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000426 fatal("%s: bad cipher name %s or pointer %p", __func__,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000427 enc->name, enc->cipher);
428
429 /* Mac structure */
430 mac->name = buffer_get_string(&b, NULL);
431 if (mac->name == NULL || mac_init(mac, mac->name) == -1)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000432 fatal("%s: can not init mac %s", __func__, mac->name);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000433 mac->enabled = buffer_get_int(&b);
434 mac->key = buffer_get_string(&b, &len);
435 if (len > mac->key_len)
Ben Lindstrom08512492002-06-27 00:23:02 +0000436 fatal("%s: bad mac key length: %u > %d", __func__, len,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000437 mac->key_len);
438 mac->key_len = len;
439
440 /* Comp structure */
441 comp->type = buffer_get_int(&b);
442 comp->enabled = buffer_get_int(&b);
443 comp->name = buffer_get_string(&b, NULL);
444
445 len = buffer_len(&b);
446 if (len != 0)
Ben Lindstrom08512492002-06-27 00:23:02 +0000447 error("newkeys_from_blob: remaining bytes in blob %u", len);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000448 buffer_free(&b);
449 return (newkey);
450}
451
452int
453mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
454{
455 Buffer b;
456 int len;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000457 Enc *enc;
458 Mac *mac;
459 Comp *comp;
460 Newkeys *newkey = newkeys[mode];
461
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000462 debug3("%s: converting %p", __func__, newkey);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000463
464 if (newkey == NULL) {
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000465 error("%s: newkey == NULL", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000466 return 0;
467 }
468 enc = &newkey->enc;
469 mac = &newkey->mac;
470 comp = &newkey->comp;
471
472 buffer_init(&b);
473 /* Enc structure */
474 buffer_put_cstring(&b, enc->name);
475 /* The cipher struct is constant and shared, you export pointer */
476 buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
477 buffer_put_int(&b, enc->enabled);
478 buffer_put_int(&b, enc->block_size);
479 buffer_put_string(&b, enc->key, enc->key_len);
480 packet_get_keyiv(mode, enc->iv, enc->block_size);
481 buffer_put_string(&b, enc->iv, enc->block_size);
482
483 /* Mac structure */
484 buffer_put_cstring(&b, mac->name);
485 buffer_put_int(&b, mac->enabled);
486 buffer_put_string(&b, mac->key, mac->key_len);
487
488 /* Comp structure */
489 buffer_put_int(&b, comp->type);
490 buffer_put_int(&b, comp->enabled);
491 buffer_put_cstring(&b, comp->name);
492
493 len = buffer_len(&b);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000494 if (lenp != NULL)
495 *lenp = len;
Ben Lindstrom2bf759c2002-07-07 22:13:31 +0000496 if (blobp != NULL) {
497 *blobp = xmalloc(len);
498 memcpy(*blobp, buffer_ptr(&b), len);
499 }
500 memset(buffer_ptr(&b), 0, len);
501 buffer_free(&b);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000502 return len;
503}
504
505static void
506mm_send_kex(Buffer *m, Kex *kex)
507{
508 buffer_put_string(m, kex->session_id, kex->session_id_len);
509 buffer_put_int(m, kex->we_need);
510 buffer_put_int(m, kex->hostkey_type);
511 buffer_put_int(m, kex->kex_type);
512 buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
513 buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
514 buffer_put_int(m, kex->flags);
515 buffer_put_cstring(m, kex->client_version_string);
516 buffer_put_cstring(m, kex->server_version_string);
517}
518
519void
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000520mm_send_keystate(struct monitor *pmonitor)
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000521{
522 Buffer m;
523 u_char *blob, *p;
524 u_int bloblen, plen;
Damien Millera5539d22003-04-09 20:50:06 +1000525 u_int32_t seqnr, packets;
526 u_int64_t blocks;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000527
528 buffer_init(&m);
529
530 if (!compat20) {
531 u_char iv[24];
Ben Lindstrom402c6cc2002-06-21 00:43:42 +0000532 u_char *key;
533 u_int ivlen, keylen;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000534
535 buffer_put_int(&m, packet_get_protocol_flags());
536
537 buffer_put_int(&m, packet_get_ssh1_cipher());
538
Ben Lindstrom402c6cc2002-06-21 00:43:42 +0000539 debug3("%s: Sending ssh1 KEY+IV", __func__);
540 keylen = packet_get_encryption_key(NULL);
541 key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
542 keylen = packet_get_encryption_key(key);
543 buffer_put_string(&m, key, keylen);
544 memset(key, 0, keylen);
545 xfree(key);
546
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000547 ivlen = packet_get_keyiv_len(MODE_OUT);
548 packet_get_keyiv(MODE_OUT, iv, ivlen);
549 buffer_put_string(&m, iv, ivlen);
550 ivlen = packet_get_keyiv_len(MODE_OUT);
551 packet_get_keyiv(MODE_IN, iv, ivlen);
552 buffer_put_string(&m, iv, ivlen);
553 goto skip;
554 } else {
555 /* Kex for rekeying */
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000556 mm_send_kex(&m, *pmonitor->m_pkex);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000557 }
558
559 debug3("%s: Sending new keys: %p %p",
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000560 __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000561
562 /* Keys from Kex */
563 if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000564 fatal("%s: conversion of newkeys failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000565
566 buffer_put_string(&m, blob, bloblen);
567 xfree(blob);
568
569 if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000570 fatal("%s: conversion of newkeys failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000571
572 buffer_put_string(&m, blob, bloblen);
573 xfree(blob);
574
Damien Millera5539d22003-04-09 20:50:06 +1000575 packet_get_state(MODE_OUT, &seqnr, &blocks, &packets);
576 buffer_put_int(&m, seqnr);
577 buffer_put_int64(&m, blocks);
578 buffer_put_int(&m, packets);
Damien Millerb1ecd9c2003-04-09 20:51:24 +1000579 packet_get_state(MODE_IN, &seqnr, &blocks, &packets);
Damien Millera5539d22003-04-09 20:50:06 +1000580 buffer_put_int(&m, seqnr);
581 buffer_put_int64(&m, blocks);
582 buffer_put_int(&m, packets);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000583
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000584 debug3("%s: New keys have been sent", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000585 skip:
586 /* More key context */
587 plen = packet_get_keycontext(MODE_OUT, NULL);
588 p = xmalloc(plen+1);
589 packet_get_keycontext(MODE_OUT, p);
590 buffer_put_string(&m, p, plen);
591 xfree(p);
592
593 plen = packet_get_keycontext(MODE_IN, NULL);
594 p = xmalloc(plen+1);
595 packet_get_keycontext(MODE_IN, p);
596 buffer_put_string(&m, p, plen);
597 xfree(p);
598
599 /* Compression state */
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000600 debug3("%s: Sending compression state", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000601 buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
602 buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
603
604 /* Network I/O buffers */
605 buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
606 buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
607
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000608 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000609 debug3("%s: Finished sending state", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000610
611 buffer_free(&m);
612}
613
614int
615mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen)
616{
617 Buffer m;
Damien Millera10f5612002-09-12 09:49:15 +1000618 char *p;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000619 int success = 0;
620
621 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000622 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000623
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000624 debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000625 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000626
627 success = buffer_get_int(&m);
628 if (success == 0) {
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000629 debug3("%s: pty alloc failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000630 buffer_free(&m);
631 return (0);
632 }
633 p = buffer_get_string(&m, NULL);
634 buffer_free(&m);
635
636 strlcpy(namebuf, p, namebuflen); /* Possible truncation */
637 xfree(p);
638
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000639 *ptyfd = mm_receive_fd(pmonitor->m_recvfd);
640 *ttyfd = mm_receive_fd(pmonitor->m_recvfd);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000641
642 /* Success */
643 return (1);
644}
645
646void
647mm_session_pty_cleanup2(void *session)
648{
649 Session *s = session;
650 Buffer m;
651
652 if (s->ttyfd == -1)
653 return;
654 buffer_init(&m);
655 buffer_put_cstring(&m, s->tty);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000656 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000657 buffer_free(&m);
658
659 /* closed dup'ed master */
660 if (close(s->ptymaster) < 0)
661 error("close(s->ptymaster): %s", strerror(errno));
662
663 /* unlink pty from session */
664 s->ttyfd = -1;
665}
666
Damien Miller79418552002-04-23 20:28:48 +1000667#ifdef USE_PAM
668void
669mm_start_pam(char *user)
670{
671 Buffer m;
672
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000673 debug3("%s entering", __func__);
Damien Miller4e448a32003-05-14 15:11:48 +1000674 if (!options.use_pam)
675 fatal("UsePAM=no, but ended up in %s anyway", __func__);
Damien Miller79418552002-04-23 20:28:48 +1000676
677 buffer_init(&m);
678 buffer_put_cstring(&m, user);
679
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000680 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
Damien Miller79418552002-04-23 20:28:48 +1000681
682 buffer_free(&m);
683}
Damien Miller4f9f42a2003-05-10 19:28:02 +1000684
685void *
686mm_sshpam_init_ctx(Authctxt *authctxt)
687{
688 Buffer m;
689 int success;
690
691 debug3("%s", __func__);
692 buffer_init(&m);
693 buffer_put_cstring(&m, authctxt->user);
694 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
695 debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
696 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
697 success = buffer_get_int(&m);
698 if (success == 0) {
699 debug3("%s: pam_init_ctx failed", __func__);
700 buffer_free(&m);
701 return (NULL);
702 }
703 buffer_free(&m);
704 return (authctxt);
705}
706
707int
708mm_sshpam_query(void *ctx, char **name, char **info,
709 u_int *num, char ***prompts, u_int **echo_on)
710{
711 Buffer m;
712 int i, ret;
713
714 debug3("%s", __func__);
715 buffer_init(&m);
716 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
717 debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
718 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
719 ret = buffer_get_int(&m);
720 debug3("%s: pam_query returned %d", __func__, ret);
721 *name = buffer_get_string(&m, NULL);
722 *info = buffer_get_string(&m, NULL);
723 *num = buffer_get_int(&m);
724 *prompts = xmalloc((*num + 1) * sizeof(char *));
725 *echo_on = xmalloc((*num + 1) * sizeof(u_int));
726 for (i = 0; i < *num; ++i) {
727 (*prompts)[i] = buffer_get_string(&m, NULL);
728 (*echo_on)[i] = buffer_get_int(&m);
729 }
730 buffer_free(&m);
731 return (ret);
732}
733
734int
735mm_sshpam_respond(void *ctx, u_int num, char **resp)
736{
737 Buffer m;
738 int i, ret;
739
740 debug3("%s", __func__);
741 buffer_init(&m);
742 buffer_put_int(&m, num);
743 for (i = 0; i < num; ++i)
744 buffer_put_cstring(&m, resp[i]);
745 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
746 debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
747 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
748 ret = buffer_get_int(&m);
749 debug3("%s: pam_respond returned %d", __func__, ret);
750 buffer_free(&m);
751 return (ret);
752}
753
754void
755mm_sshpam_free_ctx(void *ctxtp)
756{
757 Buffer m;
758
759 debug3("%s", __func__);
760 buffer_init(&m);
761 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
762 debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
763 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
764 buffer_free(&m);
765}
Damien Miller79418552002-04-23 20:28:48 +1000766#endif /* USE_PAM */
767
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000768/* Request process termination */
769
770void
771mm_terminate(void)
772{
773 Buffer m;
774
775 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000776 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000777 buffer_free(&m);
778}
779
780int
781mm_ssh1_session_key(BIGNUM *num)
782{
783 int rsafail;
784 Buffer m;
785
786 buffer_init(&m);
787 buffer_put_bignum2(&m, num);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000788 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000789
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000790 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000791
792 rsafail = buffer_get_int(&m);
793 buffer_get_bignum2(&m, num);
794
795 buffer_free(&m);
796
797 return (rsafail);
798}
799
800static void
801mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
802 char ***prompts, u_int **echo_on)
803{
Ben Lindstromcb72e4f2002-06-21 00:41:51 +0000804 *name = xstrdup("");
805 *infotxt = xstrdup("");
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000806 *numprompts = 1;
Ben Lindstroma962c2f2002-07-04 00:14:17 +0000807 *prompts = xmalloc(*numprompts * sizeof(char *));
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000808 *echo_on = xmalloc(*numprompts * sizeof(u_int));
809 (*echo_on)[0] = 0;
810}
811
812int
813mm_bsdauth_query(void *ctx, char **name, char **infotxt,
814 u_int *numprompts, char ***prompts, u_int **echo_on)
815{
816 Buffer m;
Damien Millerb7df3af2003-02-24 11:55:46 +1100817 u_int success;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000818 char *challenge;
819
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000820 debug3("%s: entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000821
822 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000823 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000824
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000825 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000826 &m);
Damien Millerb7df3af2003-02-24 11:55:46 +1100827 success = buffer_get_int(&m);
828 if (success == 0) {
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000829 debug3("%s: no challenge", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000830 buffer_free(&m);
831 return (-1);
832 }
833
834 /* Get the challenge, and format the response */
835 challenge = buffer_get_string(&m, NULL);
836 buffer_free(&m);
837
838 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
839 (*prompts)[0] = challenge;
840
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000841 debug3("%s: received challenge: %s", __func__, challenge);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000842
843 return (0);
844}
845
846int
847mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
848{
849 Buffer m;
850 int authok;
851
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000852 debug3("%s: entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000853 if (numresponses != 1)
854 return (-1);
855
856 buffer_init(&m);
857 buffer_put_cstring(&m, responses[0]);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000858 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000859
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000860 mm_request_receive_expect(pmonitor->m_recvfd,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000861 MONITOR_ANS_BSDAUTHRESPOND, &m);
862
863 authok = buffer_get_int(&m);
864 buffer_free(&m);
865
866 return ((authok == 0) ? -1 : 0);
867}
868
869int
870mm_skey_query(void *ctx, char **name, char **infotxt,
871 u_int *numprompts, char ***prompts, u_int **echo_on)
872{
873 Buffer m;
Damien Millerb7df3af2003-02-24 11:55:46 +1100874 int len;
875 u_int success;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000876 char *p, *challenge;
877
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000878 debug3("%s: entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000879
880 buffer_init(&m);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000881 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000882
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000883 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000884 &m);
Damien Millerb7df3af2003-02-24 11:55:46 +1100885 success = buffer_get_int(&m);
886 if (success == 0) {
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000887 debug3("%s: no challenge", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000888 buffer_free(&m);
889 return (-1);
890 }
891
892 /* Get the challenge, and format the response */
893 challenge = buffer_get_string(&m, NULL);
894 buffer_free(&m);
895
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000896 debug3("%s: received challenge: %s", __func__, challenge);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000897
898 mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
899
900 len = strlen(challenge) + strlen(SKEY_PROMPT) + 1;
901 p = xmalloc(len);
902 strlcpy(p, challenge, len);
903 strlcat(p, SKEY_PROMPT, len);
904 (*prompts)[0] = p;
905 xfree(challenge);
906
907 return (0);
908}
909
910int
911mm_skey_respond(void *ctx, u_int numresponses, char **responses)
912{
913 Buffer m;
914 int authok;
915
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000916 debug3("%s: entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000917 if (numresponses != 1)
918 return (-1);
919
920 buffer_init(&m);
921 buffer_put_cstring(&m, responses[0]);
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000922 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000923
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000924 mm_request_receive_expect(pmonitor->m_recvfd,
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000925 MONITOR_ANS_SKEYRESPOND, &m);
926
927 authok = buffer_get_int(&m);
928 buffer_free(&m);
929
930 return ((authok == 0) ? -1 : 0);
931}
932
933void
934mm_ssh1_session_id(u_char session_id[16])
935{
936 Buffer m;
937 int i;
938
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000939 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000940
941 buffer_init(&m);
942 for (i = 0; i < 16; i++)
943 buffer_put_char(&m, session_id[i]);
944
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000945 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000946 buffer_free(&m);
947}
948
949int
950mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
951{
952 Buffer m;
953 Key *key;
954 u_char *blob;
955 u_int blen;
Damien Miller06ebedf2003-02-24 12:03:38 +1100956 int allowed = 0, have_forced = 0;
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000957
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000958 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000959
960 buffer_init(&m);
961 buffer_put_bignum2(&m, client_n);
962
Ben Lindstrom7339b2a2002-05-15 16:25:01 +0000963 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
964 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000965
966 allowed = buffer_get_int(&m);
967
Damien Miller06ebedf2003-02-24 12:03:38 +1100968 /* fake forced command */
969 auth_clear_options();
970 have_forced = buffer_get_int(&m);
971 forced_command = have_forced ? xstrdup("true") : NULL;
972
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000973 if (allowed && rkey != NULL) {
974 blob = buffer_get_string(&m, &blen);
975 if ((key = key_from_blob(blob, blen)) == NULL)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000976 fatal("%s: key_from_blob failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000977 *rkey = key;
978 xfree(blob);
979 }
980 mm_send_debug(&m);
981 buffer_free(&m);
982
983 return (allowed);
984}
985
986BIGNUM *
987mm_auth_rsa_generate_challenge(Key *key)
988{
989 Buffer m;
990 BIGNUM *challenge;
991 u_char *blob;
992 u_int blen;
993
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000994 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000995
996 if ((challenge = BN_new()) == NULL)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +0000997 fatal("%s: BN_new failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +0000998
999 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1000 if (key_to_blob(key, &blob, &blen) == 0)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001001 fatal("%s: key_to_blob failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001002 key->type = KEY_RSA1;
1003
1004 buffer_init(&m);
1005 buffer_put_string(&m, blob, blen);
1006 xfree(blob);
1007
Ben Lindstrom7339b2a2002-05-15 16:25:01 +00001008 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1009 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001010
1011 buffer_get_bignum2(&m, challenge);
1012 buffer_free(&m);
1013
1014 return (challenge);
1015}
1016
1017int
1018mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1019{
1020 Buffer m;
1021 u_char *blob;
1022 u_int blen;
1023 int success = 0;
1024
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001025 debug3("%s entering", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001026
1027 key->type = KEY_RSA; /* XXX cheat for key_to_blob */
1028 if (key_to_blob(key, &blob, &blen) == 0)
Ben Lindstrom7d9c38f2002-06-06 21:40:51 +00001029 fatal("%s: key_to_blob failed", __func__);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001030 key->type = KEY_RSA1;
1031
1032 buffer_init(&m);
1033 buffer_put_string(&m, blob, blen);
1034 buffer_put_string(&m, response, 16);
1035 xfree(blob);
1036
Ben Lindstrom7339b2a2002-05-15 16:25:01 +00001037 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1038 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
Ben Lindstrom7a2073c2002-03-22 02:30:41 +00001039
1040 success = buffer_get_int(&m);
1041 buffer_free(&m);
1042
1043 return (success);
1044}
Damien Miller25162f22002-09-12 09:47:29 +10001045
Damien Millerd94e5492002-09-27 13:25:58 +10001046#ifdef KRB4
1047int
1048mm_auth_krb4(Authctxt *authctxt, void *_auth, char **client, void *_reply)
1049{
1050 KTEXT auth, reply;
1051 Buffer m;
1052 u_int rlen;
1053 int success = 0;
1054 char *p;
1055
1056 debug3("%s entering", __func__);
1057 auth = _auth;
1058 reply = _reply;
1059
1060 buffer_init(&m);
1061 buffer_put_string(&m, auth->dat, auth->length);
1062
1063 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB4, &m);
1064 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB4, &m);
1065
1066 success = buffer_get_int(&m);
1067 if (success) {
1068 *client = buffer_get_string(&m, NULL);
1069 p = buffer_get_string(&m, &rlen);
1070 if (rlen >= MAX_KTXT_LEN)
1071 fatal("%s: reply from monitor too large", __func__);
1072 reply->length = rlen;
1073 memcpy(reply->dat, p, rlen);
1074 memset(p, 0, rlen);
1075 xfree(p);
1076 }
1077 buffer_free(&m);
Ben Lindstrom93576d92002-12-23 02:06:19 +00001078 return (success);
Damien Millerd94e5492002-09-27 13:25:58 +10001079}
1080#endif
1081
Damien Miller25162f22002-09-12 09:47:29 +10001082#ifdef KRB5
1083int
1084mm_auth_krb5(void *ctx, void *argp, char **userp, void *resp)
1085{
1086 krb5_data *tkt, *reply;
1087 Buffer m;
1088 int success;
1089
1090 debug3("%s entering", __func__);
1091 tkt = (krb5_data *) argp;
1092 reply = (krb5_data *) resp;
1093
1094 buffer_init(&m);
1095 buffer_put_string(&m, tkt->data, tkt->length);
1096
1097 mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB5, &m);
1098 mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB5, &m);
1099
1100 success = buffer_get_int(&m);
1101 if (success) {
1102 u_int len;
1103
1104 *userp = buffer_get_string(&m, NULL);
1105 reply->data = buffer_get_string(&m, &len);
1106 reply->length = len;
1107 } else {
1108 memset(reply, 0, sizeof(*reply));
1109 *userp = NULL;
1110 }
1111
1112 buffer_free(&m);
1113 return (success);
1114}
1115#endif