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1853d1ef | 1 | /* |
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" | |
be2ca0c9 | 28 | RCSID("$OpenBSD: monitor_wrap.c,v 1.39 2004/07/17 05:31:41 dtucker Exp $"); |
1853d1ef | 29 | |
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" | |
92e15201 | 37 | #include "auth-options.h" |
1853d1ef | 38 | #include "buffer.h" |
39 | #include "bufaux.h" | |
40 | #include "packet.h" | |
41 | #include "mac.h" | |
42 | #include "log.h" | |
a655c012 | 43 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
44 | #undef TARGET_OS_MAC | |
9b08c23f | 45 | #include "zlib.h" |
a655c012 | 46 | #define TARGET_OS_MAC 1 |
47 | #else | |
48 | #include "zlib.h" | |
49 | #endif | |
1853d1ef | 50 | #include "monitor.h" |
51 | #include "monitor_wrap.h" | |
52 | #include "xmalloc.h" | |
53 | #include "atomicio.h" | |
54 | #include "monitor_fdpass.h" | |
55 | #include "getput.h" | |
7fceb20d | 56 | #include "servconf.h" |
1853d1ef | 57 | |
58 | #include "auth.h" | |
59 | #include "channels.h" | |
60 | #include "session.h" | |
61 | ||
7364bd04 | 62 | #ifdef GSSAPI |
63 | #include "ssh-gss.h" | |
64 | #endif | |
65 | ||
1853d1ef | 66 | /* Imports */ |
67 | extern int compat20; | |
68 | extern Newkeys *newkeys[]; | |
69 | extern z_stream incoming_stream; | |
70 | extern z_stream outgoing_stream; | |
b5a28cbc | 71 | extern struct monitor *pmonitor; |
1853d1ef | 72 | extern Buffer input, output; |
be2ca0c9 | 73 | extern Buffer loginmsg; |
7fceb20d | 74 | extern ServerOptions options; |
ba6dd90e | 75 | extern Buffer loginmsg; |
1853d1ef | 76 | |
2362db19 | 77 | int |
78 | mm_is_monitor(void) | |
79 | { | |
80 | /* | |
81 | * m_pid is only set in the privileged part, and | |
82 | * points to the unprivileged child. | |
83 | */ | |
74677ba3 | 84 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 85 | } |
86 | ||
1853d1ef | 87 | void |
ca75d7de | 88 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 89 | { |
1853d1ef | 90 | u_int mlen = buffer_len(m); |
405a0d43 | 91 | u_char buf[5]; |
1853d1ef | 92 | |
1588c277 | 93 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 94 | |
95 | PUT_32BIT(buf, mlen + 1); | |
7203d6bb | 96 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
ca75d7de | 97 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
1588c277 | 98 | fatal("%s: write", __func__); |
ca75d7de | 99 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
1588c277 | 100 | fatal("%s: write", __func__); |
1853d1ef | 101 | } |
102 | ||
103 | void | |
ca75d7de | 104 | mm_request_receive(int sock, Buffer *m) |
1853d1ef | 105 | { |
106 | u_char buf[4]; | |
1853d1ef | 107 | u_int msg_len; |
405a0d43 | 108 | ssize_t res; |
1853d1ef | 109 | |
1588c277 | 110 | debug3("%s entering", __func__); |
1853d1ef | 111 | |
ca75d7de | 112 | res = atomicio(read, sock, buf, sizeof(buf)); |
1853d1ef | 113 | if (res != sizeof(buf)) { |
114 | if (res == 0) | |
2362db19 | 115 | cleanup_exit(255); |
1588c277 | 116 | fatal("%s: read: %ld", __func__, (long)res); |
1853d1ef | 117 | } |
118 | msg_len = GET_32BIT(buf); | |
119 | if (msg_len > 256 * 1024) | |
1588c277 | 120 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 121 | buffer_clear(m); |
122 | buffer_append_space(m, msg_len); | |
ca75d7de | 123 | res = atomicio(read, sock, buffer_ptr(m), msg_len); |
1853d1ef | 124 | if (res != msg_len) |
1588c277 | 125 | fatal("%s: read: %ld != msg_len", __func__, (long)res); |
1853d1ef | 126 | } |
127 | ||
128 | void | |
ca75d7de | 129 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 130 | { |
131 | u_char rtype; | |
132 | ||
1588c277 | 133 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 134 | |
ca75d7de | 135 | mm_request_receive(sock, m); |
1853d1ef | 136 | rtype = buffer_get_char(m); |
137 | if (rtype != type) | |
1588c277 | 138 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 139 | rtype, type); |
140 | } | |
141 | ||
142 | DH * | |
143 | mm_choose_dh(int min, int nbits, int max) | |
144 | { | |
145 | BIGNUM *p, *g; | |
146 | int success = 0; | |
147 | Buffer m; | |
148 | ||
149 | buffer_init(&m); | |
150 | buffer_put_int(&m, min); | |
151 | buffer_put_int(&m, nbits); | |
152 | buffer_put_int(&m, max); | |
153 | ||
b5a28cbc | 154 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 155 | |
1588c277 | 156 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 157 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 158 | |
159 | success = buffer_get_char(&m); | |
160 | if (success == 0) | |
1588c277 | 161 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 162 | |
163 | if ((p = BN_new()) == NULL) | |
1588c277 | 164 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 165 | if ((g = BN_new()) == NULL) |
1588c277 | 166 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 167 | buffer_get_bignum2(&m, p); |
168 | buffer_get_bignum2(&m, g); | |
169 | ||
1588c277 | 170 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 171 | buffer_free(&m); |
172 | ||
173 | return (dh_new_group(g, p)); | |
174 | } | |
175 | ||
176 | int | |
177 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
178 | { | |
b5a28cbc | 179 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 180 | Buffer m; |
181 | ||
1588c277 | 182 | debug3("%s entering", __func__); |
1853d1ef | 183 | |
184 | buffer_init(&m); | |
185 | buffer_put_int(&m, kex->host_key_index(key)); | |
186 | buffer_put_string(&m, data, datalen); | |
187 | ||
b5a28cbc | 188 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 189 | |
1588c277 | 190 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 191 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 192 | *sigp = buffer_get_string(&m, lenp); |
193 | buffer_free(&m); | |
194 | ||
195 | return (0); | |
196 | } | |
197 | ||
198 | struct passwd * | |
18a8f313 | 199 | mm_getpwnamallow(const char *username) |
1853d1ef | 200 | { |
201 | Buffer m; | |
202 | struct passwd *pw; | |
203 | u_int pwlen; | |
204 | ||
1588c277 | 205 | debug3("%s entering", __func__); |
1853d1ef | 206 | |
207 | buffer_init(&m); | |
18a8f313 | 208 | buffer_put_cstring(&m, username); |
1853d1ef | 209 | |
b5a28cbc | 210 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 211 | |
1588c277 | 212 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 213 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 214 | |
215 | if (buffer_get_char(&m) == 0) { | |
216 | buffer_free(&m); | |
217 | return (NULL); | |
218 | } | |
219 | pw = buffer_get_string(&m, &pwlen); | |
220 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 221 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 222 | pw->pw_name = buffer_get_string(&m, NULL); |
223 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
224 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 225 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 226 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 227 | #endif |
1853d1ef | 228 | pw->pw_dir = buffer_get_string(&m, NULL); |
229 | pw->pw_shell = buffer_get_string(&m, NULL); | |
230 | buffer_free(&m); | |
231 | ||
232 | return (pw); | |
233 | } | |
234 | ||
02cd6c56 | 235 | char * |
236 | mm_auth2_read_banner(void) | |
94a73cdc | 237 | { |
238 | Buffer m; | |
239 | char *banner; | |
240 | ||
1588c277 | 241 | debug3("%s entering", __func__); |
94a73cdc | 242 | |
243 | buffer_init(&m); | |
b5a28cbc | 244 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 245 | buffer_clear(&m); |
246 | ||
02cd6c56 | 247 | mm_request_receive_expect(pmonitor->m_recvfd, |
248 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 249 | banner = buffer_get_string(&m, NULL); |
250 | buffer_free(&m); | |
7203d6bb | 251 | |
02cd6c56 | 252 | /* treat empty banner as missing banner */ |
253 | if (strlen(banner) == 0) { | |
254 | xfree(banner); | |
255 | banner = NULL; | |
256 | } | |
94a73cdc | 257 | return (banner); |
258 | } | |
259 | ||
1853d1ef | 260 | /* Inform the privileged process about service and style */ |
261 | ||
262 | void | |
263 | mm_inform_authserv(char *service, char *style) | |
264 | { | |
265 | Buffer m; | |
266 | ||
1588c277 | 267 | debug3("%s entering", __func__); |
1853d1ef | 268 | |
269 | buffer_init(&m); | |
270 | buffer_put_cstring(&m, service); | |
271 | buffer_put_cstring(&m, style ? style : ""); | |
272 | ||
b5a28cbc | 273 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 274 | |
275 | buffer_free(&m); | |
276 | } | |
277 | ||
278 | /* Do the password authentication */ | |
279 | int | |
280 | mm_auth_password(Authctxt *authctxt, char *password) | |
281 | { | |
282 | Buffer m; | |
283 | int authenticated = 0; | |
284 | ||
1588c277 | 285 | debug3("%s entering", __func__); |
1853d1ef | 286 | |
287 | buffer_init(&m); | |
288 | buffer_put_cstring(&m, password); | |
b5a28cbc | 289 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 290 | |
1588c277 | 291 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 292 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 293 | |
294 | authenticated = buffer_get_int(&m); | |
295 | ||
296 | buffer_free(&m); | |
297 | ||
298 | debug3("%s: user %sauthenticated", | |
1588c277 | 299 | __func__, authenticated ? "" : "not "); |
1853d1ef | 300 | return (authenticated); |
301 | } | |
302 | ||
303 | int | |
304 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
305 | { | |
306 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
307 | } | |
308 | ||
309 | int | |
310 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
311 | Key *key) | |
312 | { | |
313 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
314 | } | |
315 | ||
316 | int | |
317 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
318 | char *host, Key *key) | |
319 | { | |
320 | int ret; | |
321 | ||
322 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
323 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
324 | key->type = KEY_RSA1; | |
325 | return (ret); | |
326 | } | |
327 | ||
328 | static void | |
329 | mm_send_debug(Buffer *m) | |
330 | { | |
331 | char *msg; | |
332 | ||
333 | while (buffer_len(m)) { | |
334 | msg = buffer_get_string(m, NULL); | |
1588c277 | 335 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 336 | packet_send_debug("%s", msg); |
337 | xfree(msg); | |
338 | } | |
339 | } | |
340 | ||
341 | int | |
342 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
343 | { | |
344 | Buffer m; | |
345 | u_char *blob; | |
346 | u_int len; | |
92e15201 | 347 | int allowed = 0, have_forced = 0; |
1853d1ef | 348 | |
1588c277 | 349 | debug3("%s entering", __func__); |
1853d1ef | 350 | |
351 | /* Convert the key to a blob and the pass it over */ | |
352 | if (!key_to_blob(key, &blob, &len)) | |
353 | return (0); | |
354 | ||
355 | buffer_init(&m); | |
356 | buffer_put_int(&m, type); | |
357 | buffer_put_cstring(&m, user ? user : ""); | |
358 | buffer_put_cstring(&m, host ? host : ""); | |
359 | buffer_put_string(&m, blob, len); | |
360 | xfree(blob); | |
361 | ||
b5a28cbc | 362 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 363 | |
1588c277 | 364 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 365 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 366 | |
367 | allowed = buffer_get_int(&m); | |
368 | ||
92e15201 | 369 | /* fake forced command */ |
370 | auth_clear_options(); | |
371 | have_forced = buffer_get_int(&m); | |
372 | forced_command = have_forced ? xstrdup("true") : NULL; | |
373 | ||
1853d1ef | 374 | /* Send potential debug messages */ |
375 | mm_send_debug(&m); | |
376 | ||
377 | buffer_free(&m); | |
378 | ||
379 | return (allowed); | |
380 | } | |
381 | ||
382 | /* | |
383 | * This key verify needs to send the key type along, because the | |
384 | * privileged parent makes the decision if the key is allowed | |
385 | * for authentication. | |
386 | */ | |
387 | ||
388 | int | |
389 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
390 | { | |
391 | Buffer m; | |
392 | u_char *blob; | |
393 | u_int len; | |
394 | int verified = 0; | |
395 | ||
1588c277 | 396 | debug3("%s entering", __func__); |
1853d1ef | 397 | |
398 | /* Convert the key to a blob and the pass it over */ | |
399 | if (!key_to_blob(key, &blob, &len)) | |
400 | return (0); | |
401 | ||
402 | buffer_init(&m); | |
403 | buffer_put_string(&m, blob, len); | |
404 | buffer_put_string(&m, sig, siglen); | |
405 | buffer_put_string(&m, data, datalen); | |
406 | xfree(blob); | |
407 | ||
b5a28cbc | 408 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 409 | |
1588c277 | 410 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 411 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 412 | |
413 | verified = buffer_get_int(&m); | |
414 | ||
415 | buffer_free(&m); | |
416 | ||
417 | return (verified); | |
418 | } | |
419 | ||
420 | /* Export key state after authentication */ | |
421 | Newkeys * | |
422 | mm_newkeys_from_blob(u_char *blob, int blen) | |
423 | { | |
424 | Buffer b; | |
425 | u_int len; | |
426 | Newkeys *newkey = NULL; | |
427 | Enc *enc; | |
428 | Mac *mac; | |
429 | Comp *comp; | |
430 | ||
1588c277 | 431 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 432 | #ifdef DEBUG_PK |
433 | dump_base64(stderr, blob, blen); | |
434 | #endif | |
435 | buffer_init(&b); | |
436 | buffer_append(&b, blob, blen); | |
437 | ||
438 | newkey = xmalloc(sizeof(*newkey)); | |
439 | enc = &newkey->enc; | |
440 | mac = &newkey->mac; | |
441 | comp = &newkey->comp; | |
442 | ||
443 | /* Enc structure */ | |
444 | enc->name = buffer_get_string(&b, NULL); | |
445 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
446 | enc->enabled = buffer_get_int(&b); | |
447 | enc->block_size = buffer_get_int(&b); | |
448 | enc->key = buffer_get_string(&b, &enc->key_len); | |
449 | enc->iv = buffer_get_string(&b, &len); | |
450 | if (len != enc->block_size) | |
bb0640b2 | 451 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 452 | enc->block_size, len); |
453 | ||
454 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 455 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 456 | enc->name, enc->cipher); |
457 | ||
458 | /* Mac structure */ | |
459 | mac->name = buffer_get_string(&b, NULL); | |
460 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 461 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 462 | mac->enabled = buffer_get_int(&b); |
463 | mac->key = buffer_get_string(&b, &len); | |
464 | if (len > mac->key_len) | |
bb0640b2 | 465 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 466 | mac->key_len); |
467 | mac->key_len = len; | |
468 | ||
469 | /* Comp structure */ | |
470 | comp->type = buffer_get_int(&b); | |
471 | comp->enabled = buffer_get_int(&b); | |
472 | comp->name = buffer_get_string(&b, NULL); | |
473 | ||
474 | len = buffer_len(&b); | |
475 | if (len != 0) | |
bb0640b2 | 476 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 477 | buffer_free(&b); |
478 | return (newkey); | |
479 | } | |
480 | ||
481 | int | |
482 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
483 | { | |
484 | Buffer b; | |
485 | int len; | |
1853d1ef | 486 | Enc *enc; |
487 | Mac *mac; | |
488 | Comp *comp; | |
489 | Newkeys *newkey = newkeys[mode]; | |
490 | ||
1588c277 | 491 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 492 | |
493 | if (newkey == NULL) { | |
1588c277 | 494 | error("%s: newkey == NULL", __func__); |
1853d1ef | 495 | return 0; |
496 | } | |
497 | enc = &newkey->enc; | |
498 | mac = &newkey->mac; | |
499 | comp = &newkey->comp; | |
500 | ||
501 | buffer_init(&b); | |
502 | /* Enc structure */ | |
503 | buffer_put_cstring(&b, enc->name); | |
504 | /* The cipher struct is constant and shared, you export pointer */ | |
505 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
506 | buffer_put_int(&b, enc->enabled); | |
507 | buffer_put_int(&b, enc->block_size); | |
508 | buffer_put_string(&b, enc->key, enc->key_len); | |
509 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
510 | buffer_put_string(&b, enc->iv, enc->block_size); | |
511 | ||
512 | /* Mac structure */ | |
513 | buffer_put_cstring(&b, mac->name); | |
514 | buffer_put_int(&b, mac->enabled); | |
515 | buffer_put_string(&b, mac->key, mac->key_len); | |
516 | ||
517 | /* Comp structure */ | |
518 | buffer_put_int(&b, comp->type); | |
519 | buffer_put_int(&b, comp->enabled); | |
520 | buffer_put_cstring(&b, comp->name); | |
521 | ||
522 | len = buffer_len(&b); | |
1853d1ef | 523 | if (lenp != NULL) |
524 | *lenp = len; | |
eb9f2fab | 525 | if (blobp != NULL) { |
526 | *blobp = xmalloc(len); | |
527 | memcpy(*blobp, buffer_ptr(&b), len); | |
528 | } | |
529 | memset(buffer_ptr(&b), 0, len); | |
530 | buffer_free(&b); | |
1853d1ef | 531 | return len; |
532 | } | |
533 | ||
534 | static void | |
535 | mm_send_kex(Buffer *m, Kex *kex) | |
536 | { | |
537 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
538 | buffer_put_int(m, kex->we_need); | |
539 | buffer_put_int(m, kex->hostkey_type); | |
540 | buffer_put_int(m, kex->kex_type); | |
541 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
542 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
543 | buffer_put_int(m, kex->flags); | |
544 | buffer_put_cstring(m, kex->client_version_string); | |
545 | buffer_put_cstring(m, kex->server_version_string); | |
546 | } | |
547 | ||
548 | void | |
ca75d7de | 549 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 550 | { |
551 | Buffer m; | |
552 | u_char *blob, *p; | |
553 | u_int bloblen, plen; | |
ffd7b36b | 554 | u_int32_t seqnr, packets; |
555 | u_int64_t blocks; | |
1853d1ef | 556 | |
557 | buffer_init(&m); | |
558 | ||
559 | if (!compat20) { | |
560 | u_char iv[24]; | |
9459414c | 561 | u_char *key; |
562 | u_int ivlen, keylen; | |
1853d1ef | 563 | |
564 | buffer_put_int(&m, packet_get_protocol_flags()); | |
565 | ||
566 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
567 | ||
9459414c | 568 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
569 | keylen = packet_get_encryption_key(NULL); | |
570 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
571 | keylen = packet_get_encryption_key(key); | |
572 | buffer_put_string(&m, key, keylen); | |
573 | memset(key, 0, keylen); | |
574 | xfree(key); | |
575 | ||
1853d1ef | 576 | ivlen = packet_get_keyiv_len(MODE_OUT); |
577 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
578 | buffer_put_string(&m, iv, ivlen); | |
579 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
580 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
581 | buffer_put_string(&m, iv, ivlen); | |
582 | goto skip; | |
583 | } else { | |
584 | /* Kex for rekeying */ | |
ca75d7de | 585 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 586 | } |
587 | ||
588 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 589 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 590 | |
591 | /* Keys from Kex */ | |
592 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 593 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 594 | |
595 | buffer_put_string(&m, blob, bloblen); | |
596 | xfree(blob); | |
597 | ||
598 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 599 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 600 | |
601 | buffer_put_string(&m, blob, bloblen); | |
602 | xfree(blob); | |
603 | ||
ffd7b36b | 604 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
605 | buffer_put_int(&m, seqnr); | |
606 | buffer_put_int64(&m, blocks); | |
607 | buffer_put_int(&m, packets); | |
806e4c11 | 608 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 609 | buffer_put_int(&m, seqnr); |
610 | buffer_put_int64(&m, blocks); | |
611 | buffer_put_int(&m, packets); | |
1853d1ef | 612 | |
1588c277 | 613 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 614 | skip: |
615 | /* More key context */ | |
616 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
617 | p = xmalloc(plen+1); | |
618 | packet_get_keycontext(MODE_OUT, p); | |
619 | buffer_put_string(&m, p, plen); | |
620 | xfree(p); | |
621 | ||
622 | plen = packet_get_keycontext(MODE_IN, NULL); | |
623 | p = xmalloc(plen+1); | |
624 | packet_get_keycontext(MODE_IN, p); | |
625 | buffer_put_string(&m, p, plen); | |
626 | xfree(p); | |
627 | ||
628 | /* Compression state */ | |
1588c277 | 629 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 630 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
631 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
632 | ||
633 | /* Network I/O buffers */ | |
634 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
635 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
636 | ||
ca75d7de | 637 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 638 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 639 | |
640 | buffer_free(&m); | |
641 | } | |
642 | ||
643 | int | |
644 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) | |
645 | { | |
646 | Buffer m; | |
be2ca0c9 | 647 | char *p, *msg; |
1853d1ef | 648 | int success = 0; |
649 | ||
650 | buffer_init(&m); | |
b5a28cbc | 651 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 652 | |
1588c277 | 653 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 654 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 655 | |
656 | success = buffer_get_int(&m); | |
657 | if (success == 0) { | |
1588c277 | 658 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 659 | buffer_free(&m); |
660 | return (0); | |
661 | } | |
662 | p = buffer_get_string(&m, NULL); | |
be2ca0c9 | 663 | msg = buffer_get_string(&m, NULL); |
1853d1ef | 664 | buffer_free(&m); |
665 | ||
666 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
667 | xfree(p); | |
668 | ||
be2ca0c9 | 669 | buffer_append(&loginmsg, msg, strlen(msg)); |
670 | xfree(msg); | |
671 | ||
b5a28cbc | 672 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
673 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 674 | |
675 | /* Success */ | |
676 | return (1); | |
677 | } | |
678 | ||
679 | void | |
2362db19 | 680 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 681 | { |
1853d1ef | 682 | Buffer m; |
683 | ||
684 | if (s->ttyfd == -1) | |
685 | return; | |
686 | buffer_init(&m); | |
687 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 688 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 689 | buffer_free(&m); |
690 | ||
691 | /* closed dup'ed master */ | |
692 | if (close(s->ptymaster) < 0) | |
693 | error("close(s->ptymaster): %s", strerror(errno)); | |
694 | ||
695 | /* unlink pty from session */ | |
696 | s->ttyfd = -1; | |
697 | } | |
698 | ||
ad200abb | 699 | #ifdef USE_PAM |
700 | void | |
529d73ab | 701 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 702 | { |
703 | Buffer m; | |
704 | ||
1588c277 | 705 | debug3("%s entering", __func__); |
7fceb20d | 706 | if (!options.use_pam) |
707 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 708 | |
709 | buffer_init(&m); | |
b5a28cbc | 710 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 711 | |
712 | buffer_free(&m); | |
713 | } | |
05114c74 | 714 | |
5b9e2464 | 715 | u_int |
716 | mm_do_pam_account(void) | |
717 | { | |
718 | Buffer m; | |
719 | u_int ret; | |
ba6dd90e | 720 | char *msg; |
5b9e2464 | 721 | |
722 | debug3("%s entering", __func__); | |
723 | if (!options.use_pam) | |
724 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
725 | ||
726 | buffer_init(&m); | |
727 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
728 | ||
aff51935 | 729 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 730 | MONITOR_ANS_PAM_ACCOUNT, &m); |
731 | ret = buffer_get_int(&m); | |
ba6dd90e | 732 | msg = buffer_get_string(&m, NULL); |
733 | buffer_append(&loginmsg, msg, strlen(msg)); | |
734 | xfree(msg); | |
5b9e2464 | 735 | |
736 | buffer_free(&m); | |
b6453d99 | 737 | |
5b9e2464 | 738 | debug3("%s returning %d", __func__, ret); |
739 | ||
740 | return (ret); | |
741 | } | |
742 | ||
05114c74 | 743 | void * |
744 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
745 | { | |
746 | Buffer m; | |
747 | int success; | |
748 | ||
749 | debug3("%s", __func__); | |
750 | buffer_init(&m); | |
751 | buffer_put_cstring(&m, authctxt->user); | |
752 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
753 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
754 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
755 | success = buffer_get_int(&m); | |
756 | if (success == 0) { | |
757 | debug3("%s: pam_init_ctx failed", __func__); | |
758 | buffer_free(&m); | |
759 | return (NULL); | |
760 | } | |
761 | buffer_free(&m); | |
762 | return (authctxt); | |
763 | } | |
764 | ||
765 | int | |
766 | mm_sshpam_query(void *ctx, char **name, char **info, | |
767 | u_int *num, char ***prompts, u_int **echo_on) | |
768 | { | |
769 | Buffer m; | |
770 | int i, ret; | |
771 | ||
772 | debug3("%s", __func__); | |
773 | buffer_init(&m); | |
774 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
775 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
776 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
777 | ret = buffer_get_int(&m); | |
778 | debug3("%s: pam_query returned %d", __func__, ret); | |
779 | *name = buffer_get_string(&m, NULL); | |
780 | *info = buffer_get_string(&m, NULL); | |
781 | *num = buffer_get_int(&m); | |
782 | *prompts = xmalloc((*num + 1) * sizeof(char *)); | |
783 | *echo_on = xmalloc((*num + 1) * sizeof(u_int)); | |
784 | for (i = 0; i < *num; ++i) { | |
785 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
786 | (*echo_on)[i] = buffer_get_int(&m); | |
787 | } | |
788 | buffer_free(&m); | |
789 | return (ret); | |
790 | } | |
791 | ||
792 | int | |
793 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
794 | { | |
795 | Buffer m; | |
796 | int i, ret; | |
797 | ||
798 | debug3("%s", __func__); | |
799 | buffer_init(&m); | |
800 | buffer_put_int(&m, num); | |
801 | for (i = 0; i < num; ++i) | |
802 | buffer_put_cstring(&m, resp[i]); | |
803 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
804 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
805 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
806 | ret = buffer_get_int(&m); | |
807 | debug3("%s: pam_respond returned %d", __func__, ret); | |
808 | buffer_free(&m); | |
809 | return (ret); | |
810 | } | |
811 | ||
812 | void | |
813 | mm_sshpam_free_ctx(void *ctxtp) | |
814 | { | |
815 | Buffer m; | |
816 | ||
817 | debug3("%s", __func__); | |
818 | buffer_init(&m); | |
819 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
820 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
821 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
822 | buffer_free(&m); | |
823 | } | |
ad200abb | 824 | #endif /* USE_PAM */ |
825 | ||
1853d1ef | 826 | /* Request process termination */ |
827 | ||
828 | void | |
829 | mm_terminate(void) | |
830 | { | |
831 | Buffer m; | |
832 | ||
833 | buffer_init(&m); | |
b5a28cbc | 834 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 835 | buffer_free(&m); |
836 | } | |
837 | ||
838 | int | |
839 | mm_ssh1_session_key(BIGNUM *num) | |
840 | { | |
841 | int rsafail; | |
842 | Buffer m; | |
843 | ||
844 | buffer_init(&m); | |
845 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 846 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 847 | |
b5a28cbc | 848 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 849 | |
850 | rsafail = buffer_get_int(&m); | |
851 | buffer_get_bignum2(&m, num); | |
852 | ||
853 | buffer_free(&m); | |
854 | ||
855 | return (rsafail); | |
856 | } | |
857 | ||
858 | static void | |
859 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
860 | char ***prompts, u_int **echo_on) | |
861 | { | |
7203d6bb | 862 | *name = xstrdup(""); |
863 | *infotxt = xstrdup(""); | |
1853d1ef | 864 | *numprompts = 1; |
343288b8 | 865 | *prompts = xmalloc(*numprompts * sizeof(char *)); |
1853d1ef | 866 | *echo_on = xmalloc(*numprompts * sizeof(u_int)); |
867 | (*echo_on)[0] = 0; | |
868 | } | |
869 | ||
870 | int | |
871 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
872 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
873 | { | |
874 | Buffer m; | |
6d6c25e3 | 875 | u_int success; |
1853d1ef | 876 | char *challenge; |
877 | ||
1588c277 | 878 | debug3("%s: entering", __func__); |
1853d1ef | 879 | |
880 | buffer_init(&m); | |
b5a28cbc | 881 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 882 | |
b5a28cbc | 883 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 884 | &m); |
6d6c25e3 | 885 | success = buffer_get_int(&m); |
886 | if (success == 0) { | |
1588c277 | 887 | debug3("%s: no challenge", __func__); |
1853d1ef | 888 | 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 | ||
896 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
897 | (*prompts)[0] = challenge; | |
898 | ||
1588c277 | 899 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 900 | |
901 | return (0); | |
902 | } | |
903 | ||
904 | int | |
905 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
906 | { | |
907 | Buffer m; | |
908 | int authok; | |
909 | ||
1588c277 | 910 | debug3("%s: entering", __func__); |
1853d1ef | 911 | if (numresponses != 1) |
912 | return (-1); | |
913 | ||
914 | buffer_init(&m); | |
915 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 916 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 917 | |
b5a28cbc | 918 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 919 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
920 | ||
921 | authok = buffer_get_int(&m); | |
922 | buffer_free(&m); | |
923 | ||
924 | return ((authok == 0) ? -1 : 0); | |
925 | } | |
926 | ||
77751377 | 927 | #ifdef SKEY |
1853d1ef | 928 | int |
929 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
930 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
931 | { | |
932 | Buffer m; | |
6d6c25e3 | 933 | int len; |
934 | u_int success; | |
1853d1ef | 935 | char *p, *challenge; |
936 | ||
1588c277 | 937 | debug3("%s: entering", __func__); |
1853d1ef | 938 | |
939 | buffer_init(&m); | |
b5a28cbc | 940 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 941 | |
b5a28cbc | 942 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 943 | &m); |
6d6c25e3 | 944 | success = buffer_get_int(&m); |
945 | if (success == 0) { | |
1588c277 | 946 | debug3("%s: no challenge", __func__); |
1853d1ef | 947 | buffer_free(&m); |
948 | return (-1); | |
949 | } | |
950 | ||
951 | /* Get the challenge, and format the response */ | |
952 | challenge = buffer_get_string(&m, NULL); | |
953 | buffer_free(&m); | |
954 | ||
1588c277 | 955 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 956 | |
957 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
958 | ||
959 | len = strlen(challenge) + strlen(SKEY_PROMPT) + 1; | |
960 | p = xmalloc(len); | |
961 | strlcpy(p, challenge, len); | |
962 | strlcat(p, SKEY_PROMPT, len); | |
963 | (*prompts)[0] = p; | |
964 | xfree(challenge); | |
965 | ||
966 | return (0); | |
967 | } | |
968 | ||
969 | int | |
970 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
971 | { | |
972 | Buffer m; | |
973 | int authok; | |
974 | ||
1588c277 | 975 | debug3("%s: entering", __func__); |
1853d1ef | 976 | if (numresponses != 1) |
977 | return (-1); | |
978 | ||
979 | buffer_init(&m); | |
980 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 981 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 982 | |
b5a28cbc | 983 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 984 | MONITOR_ANS_SKEYRESPOND, &m); |
985 | ||
986 | authok = buffer_get_int(&m); | |
987 | buffer_free(&m); | |
988 | ||
989 | return ((authok == 0) ? -1 : 0); | |
990 | } | |
77751377 | 991 | #endif /* SKEY */ |
1853d1ef | 992 | |
993 | void | |
994 | mm_ssh1_session_id(u_char session_id[16]) | |
995 | { | |
996 | Buffer m; | |
997 | int i; | |
998 | ||
1588c277 | 999 | debug3("%s entering", __func__); |
1853d1ef | 1000 | |
1001 | buffer_init(&m); | |
1002 | for (i = 0; i < 16; i++) | |
1003 | buffer_put_char(&m, session_id[i]); | |
1004 | ||
b5a28cbc | 1005 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 1006 | buffer_free(&m); |
1007 | } | |
1008 | ||
1009 | int | |
1010 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1011 | { | |
1012 | Buffer m; | |
1013 | Key *key; | |
1014 | u_char *blob; | |
1015 | u_int blen; | |
92e15201 | 1016 | int allowed = 0, have_forced = 0; |
1853d1ef | 1017 | |
1588c277 | 1018 | debug3("%s entering", __func__); |
1853d1ef | 1019 | |
1020 | buffer_init(&m); | |
1021 | buffer_put_bignum2(&m, client_n); | |
1022 | ||
b5a28cbc | 1023 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1024 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1025 | |
1026 | allowed = buffer_get_int(&m); | |
1027 | ||
92e15201 | 1028 | /* fake forced command */ |
1029 | auth_clear_options(); | |
1030 | have_forced = buffer_get_int(&m); | |
1031 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1032 | ||
1853d1ef | 1033 | if (allowed && rkey != NULL) { |
1034 | blob = buffer_get_string(&m, &blen); | |
1035 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1036 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1037 | *rkey = key; |
1038 | xfree(blob); | |
1039 | } | |
1040 | mm_send_debug(&m); | |
1041 | buffer_free(&m); | |
1042 | ||
1043 | return (allowed); | |
1044 | } | |
1045 | ||
1046 | BIGNUM * | |
1047 | mm_auth_rsa_generate_challenge(Key *key) | |
1048 | { | |
1049 | Buffer m; | |
1050 | BIGNUM *challenge; | |
1051 | u_char *blob; | |
1052 | u_int blen; | |
1053 | ||
1588c277 | 1054 | debug3("%s entering", __func__); |
1853d1ef | 1055 | |
1056 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1057 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1058 | |
1059 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1060 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1061 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1062 | key->type = KEY_RSA1; |
1063 | ||
1064 | buffer_init(&m); | |
1065 | buffer_put_string(&m, blob, blen); | |
1066 | xfree(blob); | |
1067 | ||
b5a28cbc | 1068 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1069 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1070 | |
1071 | buffer_get_bignum2(&m, challenge); | |
1072 | buffer_free(&m); | |
1073 | ||
1074 | return (challenge); | |
1075 | } | |
1076 | ||
1077 | int | |
1078 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1079 | { | |
1080 | Buffer m; | |
1081 | u_char *blob; | |
1082 | u_int blen; | |
1083 | int success = 0; | |
1084 | ||
1588c277 | 1085 | debug3("%s entering", __func__); |
1853d1ef | 1086 | |
1087 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1088 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1089 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1090 | key->type = KEY_RSA1; |
1091 | ||
1092 | buffer_init(&m); | |
1093 | buffer_put_string(&m, blob, blen); | |
1094 | buffer_put_string(&m, response, 16); | |
1095 | xfree(blob); | |
1096 | ||
b5a28cbc | 1097 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1098 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1099 | |
1100 | success = buffer_get_int(&m); | |
1101 | buffer_free(&m); | |
1102 | ||
1103 | return (success); | |
1104 | } | |
696f6bef | 1105 | |
6039eeef | 1106 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 1107 | void |
1108 | mm_audit_event(ssh_audit_event_t event) | |
1109 | { | |
1110 | Buffer m; | |
1111 | ||
1112 | debug3("%s entering", __func__); | |
1113 | ||
1114 | buffer_init(&m); | |
1115 | buffer_put_int(&m, event); | |
1116 | ||
1117 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1118 | buffer_free(&m); | |
1119 | } | |
1120 | ||
1121 | void | |
1122 | mm_audit_run_command(const char *command) | |
1123 | { | |
1124 | Buffer m; | |
1125 | ||
1126 | debug3("%s entering command %s", __func__, command); | |
1127 | ||
1128 | buffer_init(&m); | |
1129 | buffer_put_cstring(&m, command); | |
1130 | ||
1131 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1132 | buffer_free(&m); | |
1133 | } | |
6039eeef | 1134 | #endif /* SSH_AUDIT_EVENTS */ |
c00e4d75 | 1135 | |
7364bd04 | 1136 | #ifdef GSSAPI |
1137 | OM_uint32 | |
ca75d7de | 1138 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1139 | { |
1140 | Buffer m; | |
1141 | OM_uint32 major; | |
1142 | ||
1143 | /* Client doesn't get to see the context */ | |
1144 | *ctx = NULL; | |
1145 | ||
1146 | buffer_init(&m); | |
ca75d7de | 1147 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1148 | |
1149 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1150 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1151 | ||
1152 | major = buffer_get_int(&m); | |
1153 | ||
1154 | buffer_free(&m); | |
1155 | return (major); | |
1156 | } | |
1157 | ||
1158 | OM_uint32 | |
1159 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1160 | gss_buffer_desc *out, OM_uint32 *flags) | |
1161 | { | |
1162 | Buffer m; | |
1163 | OM_uint32 major; | |
f99e1ca4 | 1164 | u_int len; |
7364bd04 | 1165 | |
1166 | buffer_init(&m); | |
1167 | buffer_put_string(&m, in->value, in->length); | |
1168 | ||
1169 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1170 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1171 | ||
1172 | major = buffer_get_int(&m); | |
f99e1ca4 | 1173 | out->value = buffer_get_string(&m, &len); |
1174 | out->length = len; | |
7364bd04 | 1175 | if (flags) |
1176 | *flags = buffer_get_int(&m); | |
1177 | ||
1178 | buffer_free(&m); | |
1179 | ||
1180 | return (major); | |
1181 | } | |
1182 | ||
0789992b | 1183 | OM_uint32 |
1184 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1185 | { | |
1186 | Buffer m; | |
1187 | OM_uint32 major; | |
1188 | ||
1189 | buffer_init(&m); | |
1190 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1191 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1192 | ||
1193 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1194 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1195 | &m); | |
1196 | ||
1197 | major = buffer_get_int(&m); | |
1198 | buffer_free(&m); | |
1199 | return(major); | |
1200 | } | |
1201 | ||
7364bd04 | 1202 | int |
1203 | mm_ssh_gssapi_userok(char *user) | |
1204 | { | |
1205 | Buffer m; | |
1206 | int authenticated = 0; | |
1207 | ||
1208 | buffer_init(&m); | |
1209 | ||
1210 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1211 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1212 | &m); | |
1213 | ||
1214 | authenticated = buffer_get_int(&m); | |
1215 | ||
1216 | buffer_free(&m); | |
1217 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1218 | return (authenticated); | |
1219 | } | |
1220 | #endif /* GSSAPI */ |