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700318f3 | 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" | |
665a873d | 28 | RCSID("$OpenBSD: monitor_wrap.c,v 1.40 2005/05/24 17:32:43 avsm Exp $"); |
700318f3 | 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" | |
6a9b3198 | 37 | #include "auth-options.h" |
700318f3 | 38 | #include "buffer.h" |
39 | #include "bufaux.h" | |
40 | #include "packet.h" | |
41 | #include "mac.h" | |
42 | #include "log.h" | |
99be0775 | 43 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
44 | #undef TARGET_OS_MAC | |
700318f3 | 45 | #include "zlib.h" |
99be0775 | 46 | #define TARGET_OS_MAC 1 |
47 | #else | |
48 | #include "zlib.h" | |
49 | #endif | |
700318f3 | 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" | |
0fff78ff | 56 | #include "servconf.h" |
700318f3 | 57 | |
58 | #include "auth.h" | |
59 | #include "channels.h" | |
60 | #include "session.h" | |
61 | ||
0fff78ff | 62 | #ifdef GSSAPI |
63 | #include "ssh-gss.h" | |
64 | #endif | |
65 | ||
700318f3 | 66 | /* Imports */ |
67 | extern int compat20; | |
68 | extern Newkeys *newkeys[]; | |
69 | extern z_stream incoming_stream; | |
70 | extern z_stream outgoing_stream; | |
71 | extern struct monitor *pmonitor; | |
72 | extern Buffer input, output; | |
c9f39d2c | 73 | extern Buffer loginmsg; |
0fff78ff | 74 | extern ServerOptions options; |
996d5e62 | 75 | extern Buffer loginmsg; |
700318f3 | 76 | |
cdd66111 | 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 | */ | |
84 | return (pmonitor && pmonitor->m_pid > 0); | |
85 | } | |
86 | ||
700318f3 | 87 | void |
c9f39d2c | 88 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
700318f3 | 89 | { |
700318f3 | 90 | u_int mlen = buffer_len(m); |
41b2f314 | 91 | u_char buf[5]; |
700318f3 | 92 | |
f5799ae1 | 93 | debug3("%s entering: type %d", __func__, type); |
700318f3 | 94 | |
95 | PUT_32BIT(buf, mlen + 1); | |
f5799ae1 | 96 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
c9f39d2c | 97 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
665a873d | 98 | fatal("%s: write: %s", __func__, strerror(errno)); |
c9f39d2c | 99 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
665a873d | 100 | fatal("%s: write: %s", __func__, strerror(errno)); |
700318f3 | 101 | } |
102 | ||
103 | void | |
c9f39d2c | 104 | mm_request_receive(int sock, Buffer *m) |
700318f3 | 105 | { |
106 | u_char buf[4]; | |
700318f3 | 107 | u_int msg_len; |
108 | ||
f5799ae1 | 109 | debug3("%s entering", __func__); |
700318f3 | 110 | |
665a873d | 111 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
112 | if (errno == EPIPE) | |
cdd66111 | 113 | cleanup_exit(255); |
665a873d | 114 | fatal("%s: read: %s", __func__, strerror(errno)); |
700318f3 | 115 | } |
116 | msg_len = GET_32BIT(buf); | |
117 | if (msg_len > 256 * 1024) | |
f5799ae1 | 118 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
700318f3 | 119 | buffer_clear(m); |
120 | buffer_append_space(m, msg_len); | |
665a873d | 121 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
122 | fatal("%s: read: %s", __func__, strerror(errno)); | |
700318f3 | 123 | } |
124 | ||
125 | void | |
c9f39d2c | 126 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
700318f3 | 127 | { |
128 | u_char rtype; | |
129 | ||
f5799ae1 | 130 | debug3("%s entering: type %d", __func__, type); |
700318f3 | 131 | |
c9f39d2c | 132 | mm_request_receive(sock, m); |
700318f3 | 133 | rtype = buffer_get_char(m); |
134 | if (rtype != type) | |
f5799ae1 | 135 | fatal("%s: read: rtype %d != type %d", __func__, |
700318f3 | 136 | rtype, type); |
137 | } | |
138 | ||
139 | DH * | |
140 | mm_choose_dh(int min, int nbits, int max) | |
141 | { | |
142 | BIGNUM *p, *g; | |
143 | int success = 0; | |
144 | Buffer m; | |
145 | ||
146 | buffer_init(&m); | |
147 | buffer_put_int(&m, min); | |
148 | buffer_put_int(&m, nbits); | |
149 | buffer_put_int(&m, max); | |
150 | ||
151 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); | |
152 | ||
f5799ae1 | 153 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
700318f3 | 154 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
155 | ||
156 | success = buffer_get_char(&m); | |
157 | if (success == 0) | |
f5799ae1 | 158 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
700318f3 | 159 | |
160 | if ((p = BN_new()) == NULL) | |
f5799ae1 | 161 | fatal("%s: BN_new failed", __func__); |
700318f3 | 162 | if ((g = BN_new()) == NULL) |
f5799ae1 | 163 | fatal("%s: BN_new failed", __func__); |
700318f3 | 164 | buffer_get_bignum2(&m, p); |
165 | buffer_get_bignum2(&m, g); | |
166 | ||
f5799ae1 | 167 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
700318f3 | 168 | buffer_free(&m); |
169 | ||
170 | return (dh_new_group(g, p)); | |
171 | } | |
172 | ||
173 | int | |
174 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
175 | { | |
176 | Kex *kex = *pmonitor->m_pkex; | |
177 | Buffer m; | |
178 | ||
f5799ae1 | 179 | debug3("%s entering", __func__); |
700318f3 | 180 | |
181 | buffer_init(&m); | |
182 | buffer_put_int(&m, kex->host_key_index(key)); | |
183 | buffer_put_string(&m, data, datalen); | |
184 | ||
185 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); | |
186 | ||
f5799ae1 | 187 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
700318f3 | 188 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
189 | *sigp = buffer_get_string(&m, lenp); | |
190 | buffer_free(&m); | |
191 | ||
192 | return (0); | |
193 | } | |
194 | ||
195 | struct passwd * | |
c9f39d2c | 196 | mm_getpwnamallow(const char *username) |
700318f3 | 197 | { |
198 | Buffer m; | |
199 | struct passwd *pw; | |
200 | u_int pwlen; | |
201 | ||
f5799ae1 | 202 | debug3("%s entering", __func__); |
700318f3 | 203 | |
204 | buffer_init(&m); | |
c9f39d2c | 205 | buffer_put_cstring(&m, username); |
700318f3 | 206 | |
207 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); | |
208 | ||
f5799ae1 | 209 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
700318f3 | 210 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
211 | ||
212 | if (buffer_get_char(&m) == 0) { | |
213 | buffer_free(&m); | |
214 | return (NULL); | |
215 | } | |
216 | pw = buffer_get_string(&m, &pwlen); | |
217 | if (pwlen != sizeof(struct passwd)) | |
f5799ae1 | 218 | fatal("%s: struct passwd size mismatch", __func__); |
700318f3 | 219 | pw->pw_name = buffer_get_string(&m, NULL); |
220 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
221 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
222 | #ifdef HAVE_PW_CLASS_IN_PASSWD | |
223 | pw->pw_class = buffer_get_string(&m, NULL); | |
224 | #endif | |
225 | pw->pw_dir = buffer_get_string(&m, NULL); | |
226 | pw->pw_shell = buffer_get_string(&m, NULL); | |
227 | buffer_free(&m); | |
228 | ||
229 | return (pw); | |
230 | } | |
231 | ||
cdd66111 | 232 | char * |
233 | mm_auth2_read_banner(void) | |
700318f3 | 234 | { |
235 | Buffer m; | |
236 | char *banner; | |
237 | ||
f5799ae1 | 238 | debug3("%s entering", __func__); |
700318f3 | 239 | |
240 | buffer_init(&m); | |
241 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); | |
242 | buffer_clear(&m); | |
243 | ||
cdd66111 | 244 | mm_request_receive_expect(pmonitor->m_recvfd, |
245 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
700318f3 | 246 | banner = buffer_get_string(&m, NULL); |
247 | buffer_free(&m); | |
f5799ae1 | 248 | |
cdd66111 | 249 | /* treat empty banner as missing banner */ |
250 | if (strlen(banner) == 0) { | |
251 | xfree(banner); | |
252 | banner = NULL; | |
253 | } | |
700318f3 | 254 | return (banner); |
255 | } | |
256 | ||
257 | /* Inform the privileged process about service and style */ | |
258 | ||
259 | void | |
260 | mm_inform_authserv(char *service, char *style) | |
261 | { | |
262 | Buffer m; | |
263 | ||
f5799ae1 | 264 | debug3("%s entering", __func__); |
700318f3 | 265 | |
266 | buffer_init(&m); | |
267 | buffer_put_cstring(&m, service); | |
268 | buffer_put_cstring(&m, style ? style : ""); | |
269 | ||
270 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); | |
271 | ||
272 | buffer_free(&m); | |
273 | } | |
274 | ||
275 | /* Do the password authentication */ | |
276 | int | |
277 | mm_auth_password(Authctxt *authctxt, char *password) | |
278 | { | |
279 | Buffer m; | |
280 | int authenticated = 0; | |
281 | ||
f5799ae1 | 282 | debug3("%s entering", __func__); |
700318f3 | 283 | |
284 | buffer_init(&m); | |
285 | buffer_put_cstring(&m, password); | |
286 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); | |
287 | ||
f5799ae1 | 288 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
700318f3 | 289 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
290 | ||
291 | authenticated = buffer_get_int(&m); | |
292 | ||
293 | buffer_free(&m); | |
294 | ||
295 | debug3("%s: user %sauthenticated", | |
f5799ae1 | 296 | __func__, authenticated ? "" : "not "); |
700318f3 | 297 | return (authenticated); |
298 | } | |
299 | ||
300 | int | |
301 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
302 | { | |
303 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
304 | } | |
305 | ||
306 | int | |
307 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
308 | Key *key) | |
309 | { | |
310 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
311 | } | |
312 | ||
313 | int | |
314 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
315 | char *host, Key *key) | |
316 | { | |
317 | int ret; | |
318 | ||
319 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
320 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
321 | key->type = KEY_RSA1; | |
322 | return (ret); | |
323 | } | |
324 | ||
325 | static void | |
326 | mm_send_debug(Buffer *m) | |
327 | { | |
328 | char *msg; | |
329 | ||
330 | while (buffer_len(m)) { | |
331 | msg = buffer_get_string(m, NULL); | |
f5799ae1 | 332 | debug3("%s: Sending debug: %s", __func__, msg); |
700318f3 | 333 | packet_send_debug("%s", msg); |
334 | xfree(msg); | |
335 | } | |
336 | } | |
337 | ||
338 | int | |
339 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
340 | { | |
341 | Buffer m; | |
342 | u_char *blob; | |
343 | u_int len; | |
6a9b3198 | 344 | int allowed = 0, have_forced = 0; |
700318f3 | 345 | |
f5799ae1 | 346 | debug3("%s entering", __func__); |
700318f3 | 347 | |
348 | /* Convert the key to a blob and the pass it over */ | |
349 | if (!key_to_blob(key, &blob, &len)) | |
350 | return (0); | |
351 | ||
352 | buffer_init(&m); | |
353 | buffer_put_int(&m, type); | |
354 | buffer_put_cstring(&m, user ? user : ""); | |
355 | buffer_put_cstring(&m, host ? host : ""); | |
356 | buffer_put_string(&m, blob, len); | |
357 | xfree(blob); | |
358 | ||
359 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); | |
360 | ||
f5799ae1 | 361 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
700318f3 | 362 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
363 | ||
364 | allowed = buffer_get_int(&m); | |
365 | ||
6a9b3198 | 366 | /* fake forced command */ |
367 | auth_clear_options(); | |
368 | have_forced = buffer_get_int(&m); | |
369 | forced_command = have_forced ? xstrdup("true") : NULL; | |
370 | ||
700318f3 | 371 | /* Send potential debug messages */ |
372 | mm_send_debug(&m); | |
373 | ||
374 | buffer_free(&m); | |
375 | ||
376 | return (allowed); | |
377 | } | |
378 | ||
379 | /* | |
380 | * This key verify needs to send the key type along, because the | |
381 | * privileged parent makes the decision if the key is allowed | |
382 | * for authentication. | |
383 | */ | |
384 | ||
385 | int | |
386 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
387 | { | |
388 | Buffer m; | |
389 | u_char *blob; | |
390 | u_int len; | |
391 | int verified = 0; | |
392 | ||
f5799ae1 | 393 | debug3("%s entering", __func__); |
700318f3 | 394 | |
395 | /* Convert the key to a blob and the pass it over */ | |
396 | if (!key_to_blob(key, &blob, &len)) | |
397 | return (0); | |
398 | ||
399 | buffer_init(&m); | |
400 | buffer_put_string(&m, blob, len); | |
401 | buffer_put_string(&m, sig, siglen); | |
402 | buffer_put_string(&m, data, datalen); | |
403 | xfree(blob); | |
404 | ||
405 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); | |
406 | ||
f5799ae1 | 407 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
700318f3 | 408 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
409 | ||
410 | verified = buffer_get_int(&m); | |
411 | ||
412 | buffer_free(&m); | |
413 | ||
414 | return (verified); | |
415 | } | |
416 | ||
417 | /* Export key state after authentication */ | |
418 | Newkeys * | |
419 | mm_newkeys_from_blob(u_char *blob, int blen) | |
420 | { | |
421 | Buffer b; | |
422 | u_int len; | |
423 | Newkeys *newkey = NULL; | |
424 | Enc *enc; | |
425 | Mac *mac; | |
426 | Comp *comp; | |
427 | ||
f5799ae1 | 428 | debug3("%s: %p(%d)", __func__, blob, blen); |
700318f3 | 429 | #ifdef DEBUG_PK |
430 | dump_base64(stderr, blob, blen); | |
431 | #endif | |
432 | buffer_init(&b); | |
433 | buffer_append(&b, blob, blen); | |
434 | ||
435 | newkey = xmalloc(sizeof(*newkey)); | |
436 | enc = &newkey->enc; | |
437 | mac = &newkey->mac; | |
438 | comp = &newkey->comp; | |
439 | ||
440 | /* Enc structure */ | |
441 | enc->name = buffer_get_string(&b, NULL); | |
442 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
443 | enc->enabled = buffer_get_int(&b); | |
444 | enc->block_size = buffer_get_int(&b); | |
445 | enc->key = buffer_get_string(&b, &enc->key_len); | |
446 | enc->iv = buffer_get_string(&b, &len); | |
447 | if (len != enc->block_size) | |
41b2f314 | 448 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
700318f3 | 449 | enc->block_size, len); |
450 | ||
451 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
f5799ae1 | 452 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
700318f3 | 453 | enc->name, enc->cipher); |
454 | ||
455 | /* Mac structure */ | |
456 | mac->name = buffer_get_string(&b, NULL); | |
457 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
f5799ae1 | 458 | fatal("%s: can not init mac %s", __func__, mac->name); |
700318f3 | 459 | mac->enabled = buffer_get_int(&b); |
460 | mac->key = buffer_get_string(&b, &len); | |
461 | if (len > mac->key_len) | |
41b2f314 | 462 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
700318f3 | 463 | mac->key_len); |
464 | mac->key_len = len; | |
465 | ||
466 | /* Comp structure */ | |
467 | comp->type = buffer_get_int(&b); | |
468 | comp->enabled = buffer_get_int(&b); | |
469 | comp->name = buffer_get_string(&b, NULL); | |
470 | ||
471 | len = buffer_len(&b); | |
472 | if (len != 0) | |
41b2f314 | 473 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
700318f3 | 474 | buffer_free(&b); |
475 | return (newkey); | |
476 | } | |
477 | ||
478 | int | |
479 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
480 | { | |
481 | Buffer b; | |
482 | int len; | |
700318f3 | 483 | Enc *enc; |
484 | Mac *mac; | |
485 | Comp *comp; | |
486 | Newkeys *newkey = newkeys[mode]; | |
487 | ||
f5799ae1 | 488 | debug3("%s: converting %p", __func__, newkey); |
700318f3 | 489 | |
490 | if (newkey == NULL) { | |
f5799ae1 | 491 | error("%s: newkey == NULL", __func__); |
700318f3 | 492 | return 0; |
493 | } | |
494 | enc = &newkey->enc; | |
495 | mac = &newkey->mac; | |
496 | comp = &newkey->comp; | |
497 | ||
498 | buffer_init(&b); | |
499 | /* Enc structure */ | |
500 | buffer_put_cstring(&b, enc->name); | |
501 | /* The cipher struct is constant and shared, you export pointer */ | |
502 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
503 | buffer_put_int(&b, enc->enabled); | |
504 | buffer_put_int(&b, enc->block_size); | |
505 | buffer_put_string(&b, enc->key, enc->key_len); | |
506 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
507 | buffer_put_string(&b, enc->iv, enc->block_size); | |
508 | ||
509 | /* Mac structure */ | |
510 | buffer_put_cstring(&b, mac->name); | |
511 | buffer_put_int(&b, mac->enabled); | |
512 | buffer_put_string(&b, mac->key, mac->key_len); | |
513 | ||
514 | /* Comp structure */ | |
515 | buffer_put_int(&b, comp->type); | |
516 | buffer_put_int(&b, comp->enabled); | |
517 | buffer_put_cstring(&b, comp->name); | |
518 | ||
519 | len = buffer_len(&b); | |
700318f3 | 520 | if (lenp != NULL) |
521 | *lenp = len; | |
41b2f314 | 522 | if (blobp != NULL) { |
523 | *blobp = xmalloc(len); | |
524 | memcpy(*blobp, buffer_ptr(&b), len); | |
525 | } | |
526 | memset(buffer_ptr(&b), 0, len); | |
527 | buffer_free(&b); | |
700318f3 | 528 | return len; |
529 | } | |
530 | ||
531 | static void | |
532 | mm_send_kex(Buffer *m, Kex *kex) | |
533 | { | |
534 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
535 | buffer_put_int(m, kex->we_need); | |
536 | buffer_put_int(m, kex->hostkey_type); | |
537 | buffer_put_int(m, kex->kex_type); | |
538 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
539 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
540 | buffer_put_int(m, kex->flags); | |
541 | buffer_put_cstring(m, kex->client_version_string); | |
542 | buffer_put_cstring(m, kex->server_version_string); | |
543 | } | |
544 | ||
545 | void | |
c9f39d2c | 546 | mm_send_keystate(struct monitor *monitor) |
700318f3 | 547 | { |
548 | Buffer m; | |
549 | u_char *blob, *p; | |
550 | u_int bloblen, plen; | |
0fff78ff | 551 | u_int32_t seqnr, packets; |
552 | u_int64_t blocks; | |
700318f3 | 553 | |
554 | buffer_init(&m); | |
555 | ||
556 | if (!compat20) { | |
557 | u_char iv[24]; | |
f5799ae1 | 558 | u_char *key; |
559 | u_int ivlen, keylen; | |
700318f3 | 560 | |
561 | buffer_put_int(&m, packet_get_protocol_flags()); | |
562 | ||
563 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
564 | ||
f5799ae1 | 565 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
566 | keylen = packet_get_encryption_key(NULL); | |
567 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
568 | keylen = packet_get_encryption_key(key); | |
569 | buffer_put_string(&m, key, keylen); | |
570 | memset(key, 0, keylen); | |
571 | xfree(key); | |
572 | ||
700318f3 | 573 | ivlen = packet_get_keyiv_len(MODE_OUT); |
574 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
575 | buffer_put_string(&m, iv, ivlen); | |
576 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
577 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
578 | buffer_put_string(&m, iv, ivlen); | |
579 | goto skip; | |
580 | } else { | |
581 | /* Kex for rekeying */ | |
c9f39d2c | 582 | mm_send_kex(&m, *monitor->m_pkex); |
700318f3 | 583 | } |
584 | ||
585 | debug3("%s: Sending new keys: %p %p", | |
f5799ae1 | 586 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
700318f3 | 587 | |
588 | /* Keys from Kex */ | |
589 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
f5799ae1 | 590 | fatal("%s: conversion of newkeys failed", __func__); |
700318f3 | 591 | |
592 | buffer_put_string(&m, blob, bloblen); | |
593 | xfree(blob); | |
594 | ||
595 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
f5799ae1 | 596 | fatal("%s: conversion of newkeys failed", __func__); |
700318f3 | 597 | |
598 | buffer_put_string(&m, blob, bloblen); | |
599 | xfree(blob); | |
600 | ||
0fff78ff | 601 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
602 | buffer_put_int(&m, seqnr); | |
603 | buffer_put_int64(&m, blocks); | |
604 | buffer_put_int(&m, packets); | |
605 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); | |
606 | buffer_put_int(&m, seqnr); | |
607 | buffer_put_int64(&m, blocks); | |
608 | buffer_put_int(&m, packets); | |
700318f3 | 609 | |
f5799ae1 | 610 | debug3("%s: New keys have been sent", __func__); |
700318f3 | 611 | skip: |
612 | /* More key context */ | |
613 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
614 | p = xmalloc(plen+1); | |
615 | packet_get_keycontext(MODE_OUT, p); | |
616 | buffer_put_string(&m, p, plen); | |
617 | xfree(p); | |
618 | ||
619 | plen = packet_get_keycontext(MODE_IN, NULL); | |
620 | p = xmalloc(plen+1); | |
621 | packet_get_keycontext(MODE_IN, p); | |
622 | buffer_put_string(&m, p, plen); | |
623 | xfree(p); | |
624 | ||
625 | /* Compression state */ | |
f5799ae1 | 626 | debug3("%s: Sending compression state", __func__); |
700318f3 | 627 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
628 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
629 | ||
630 | /* Network I/O buffers */ | |
631 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
632 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
633 | ||
c9f39d2c | 634 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
f5799ae1 | 635 | debug3("%s: Finished sending state", __func__); |
700318f3 | 636 | |
637 | buffer_free(&m); | |
638 | } | |
639 | ||
640 | int | |
641 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) | |
642 | { | |
643 | Buffer m; | |
c9f39d2c | 644 | char *p, *msg; |
700318f3 | 645 | int success = 0; |
646 | ||
647 | buffer_init(&m); | |
648 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); | |
649 | ||
f5799ae1 | 650 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
700318f3 | 651 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
652 | ||
653 | success = buffer_get_int(&m); | |
654 | if (success == 0) { | |
f5799ae1 | 655 | debug3("%s: pty alloc failed", __func__); |
700318f3 | 656 | buffer_free(&m); |
657 | return (0); | |
658 | } | |
659 | p = buffer_get_string(&m, NULL); | |
c9f39d2c | 660 | msg = buffer_get_string(&m, NULL); |
700318f3 | 661 | buffer_free(&m); |
662 | ||
663 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
664 | xfree(p); | |
665 | ||
c9f39d2c | 666 | buffer_append(&loginmsg, msg, strlen(msg)); |
667 | xfree(msg); | |
668 | ||
700318f3 | 669 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
670 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
671 | ||
672 | /* Success */ | |
673 | return (1); | |
674 | } | |
675 | ||
676 | void | |
cdd66111 | 677 | mm_session_pty_cleanup2(Session *s) |
700318f3 | 678 | { |
700318f3 | 679 | Buffer m; |
680 | ||
681 | if (s->ttyfd == -1) | |
682 | return; | |
683 | buffer_init(&m); | |
684 | buffer_put_cstring(&m, s->tty); | |
685 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); | |
686 | buffer_free(&m); | |
687 | ||
688 | /* closed dup'ed master */ | |
689 | if (close(s->ptymaster) < 0) | |
690 | error("close(s->ptymaster): %s", strerror(errno)); | |
691 | ||
692 | /* unlink pty from session */ | |
693 | s->ttyfd = -1; | |
694 | } | |
695 | ||
696 | #ifdef USE_PAM | |
697 | void | |
99be0775 | 698 | mm_start_pam(Authctxt *authctxt) |
700318f3 | 699 | { |
700 | Buffer m; | |
701 | ||
f5799ae1 | 702 | debug3("%s entering", __func__); |
0fff78ff | 703 | if (!options.use_pam) |
704 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
700318f3 | 705 | |
706 | buffer_init(&m); | |
700318f3 | 707 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
708 | ||
709 | buffer_free(&m); | |
710 | } | |
0fff78ff | 711 | |
712 | u_int | |
713 | mm_do_pam_account(void) | |
714 | { | |
715 | Buffer m; | |
716 | u_int ret; | |
996d5e62 | 717 | char *msg; |
0fff78ff | 718 | |
719 | debug3("%s entering", __func__); | |
720 | if (!options.use_pam) | |
721 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
722 | ||
723 | buffer_init(&m); | |
724 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
725 | ||
cdd66111 | 726 | mm_request_receive_expect(pmonitor->m_recvfd, |
0fff78ff | 727 | MONITOR_ANS_PAM_ACCOUNT, &m); |
728 | ret = buffer_get_int(&m); | |
996d5e62 | 729 | msg = buffer_get_string(&m, NULL); |
730 | buffer_append(&loginmsg, msg, strlen(msg)); | |
731 | xfree(msg); | |
0fff78ff | 732 | |
733 | buffer_free(&m); | |
cdd66111 | 734 | |
0fff78ff | 735 | debug3("%s returning %d", __func__, ret); |
736 | ||
737 | return (ret); | |
738 | } | |
739 | ||
740 | void * | |
741 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
742 | { | |
743 | Buffer m; | |
744 | int success; | |
745 | ||
746 | debug3("%s", __func__); | |
747 | buffer_init(&m); | |
748 | buffer_put_cstring(&m, authctxt->user); | |
749 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
750 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
751 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
752 | success = buffer_get_int(&m); | |
753 | if (success == 0) { | |
754 | debug3("%s: pam_init_ctx failed", __func__); | |
755 | buffer_free(&m); | |
756 | return (NULL); | |
757 | } | |
758 | buffer_free(&m); | |
759 | return (authctxt); | |
760 | } | |
761 | ||
762 | int | |
763 | mm_sshpam_query(void *ctx, char **name, char **info, | |
764 | u_int *num, char ***prompts, u_int **echo_on) | |
765 | { | |
766 | Buffer m; | |
665a873d | 767 | u_int i; |
768 | int ret; | |
0fff78ff | 769 | |
770 | debug3("%s", __func__); | |
771 | buffer_init(&m); | |
772 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
773 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
774 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
775 | ret = buffer_get_int(&m); | |
776 | debug3("%s: pam_query returned %d", __func__, ret); | |
777 | *name = buffer_get_string(&m, NULL); | |
778 | *info = buffer_get_string(&m, NULL); | |
779 | *num = buffer_get_int(&m); | |
780 | *prompts = xmalloc((*num + 1) * sizeof(char *)); | |
781 | *echo_on = xmalloc((*num + 1) * sizeof(u_int)); | |
782 | for (i = 0; i < *num; ++i) { | |
783 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
784 | (*echo_on)[i] = buffer_get_int(&m); | |
785 | } | |
786 | buffer_free(&m); | |
787 | return (ret); | |
788 | } | |
789 | ||
790 | int | |
791 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
792 | { | |
793 | Buffer m; | |
665a873d | 794 | u_int i; |
795 | int ret; | |
0fff78ff | 796 | |
797 | debug3("%s", __func__); | |
798 | buffer_init(&m); | |
799 | buffer_put_int(&m, num); | |
800 | for (i = 0; i < num; ++i) | |
801 | buffer_put_cstring(&m, resp[i]); | |
802 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
803 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
804 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
805 | ret = buffer_get_int(&m); | |
806 | debug3("%s: pam_respond returned %d", __func__, ret); | |
807 | buffer_free(&m); | |
808 | return (ret); | |
809 | } | |
810 | ||
811 | void | |
812 | mm_sshpam_free_ctx(void *ctxtp) | |
813 | { | |
814 | Buffer m; | |
815 | ||
816 | debug3("%s", __func__); | |
817 | buffer_init(&m); | |
818 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
819 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
820 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
821 | buffer_free(&m); | |
822 | } | |
700318f3 | 823 | #endif /* USE_PAM */ |
824 | ||
825 | /* Request process termination */ | |
826 | ||
827 | void | |
828 | mm_terminate(void) | |
829 | { | |
830 | Buffer m; | |
831 | ||
832 | buffer_init(&m); | |
833 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); | |
834 | buffer_free(&m); | |
835 | } | |
836 | ||
837 | int | |
838 | mm_ssh1_session_key(BIGNUM *num) | |
839 | { | |
840 | int rsafail; | |
841 | Buffer m; | |
842 | ||
843 | buffer_init(&m); | |
844 | buffer_put_bignum2(&m, num); | |
845 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); | |
846 | ||
847 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); | |
848 | ||
849 | rsafail = buffer_get_int(&m); | |
850 | buffer_get_bignum2(&m, num); | |
851 | ||
852 | buffer_free(&m); | |
853 | ||
854 | return (rsafail); | |
855 | } | |
856 | ||
857 | static void | |
858 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
859 | char ***prompts, u_int **echo_on) | |
860 | { | |
f5799ae1 | 861 | *name = xstrdup(""); |
862 | *infotxt = xstrdup(""); | |
700318f3 | 863 | *numprompts = 1; |
41b2f314 | 864 | *prompts = xmalloc(*numprompts * sizeof(char *)); |
700318f3 | 865 | *echo_on = xmalloc(*numprompts * sizeof(u_int)); |
866 | (*echo_on)[0] = 0; | |
867 | } | |
868 | ||
869 | int | |
870 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
871 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
872 | { | |
873 | Buffer m; | |
6a9b3198 | 874 | u_int success; |
700318f3 | 875 | char *challenge; |
876 | ||
f5799ae1 | 877 | debug3("%s: entering", __func__); |
700318f3 | 878 | |
879 | buffer_init(&m); | |
880 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); | |
881 | ||
882 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, | |
883 | &m); | |
6a9b3198 | 884 | success = buffer_get_int(&m); |
885 | if (success == 0) { | |
f5799ae1 | 886 | debug3("%s: no challenge", __func__); |
700318f3 | 887 | buffer_free(&m); |
888 | return (-1); | |
889 | } | |
890 | ||
891 | /* Get the challenge, and format the response */ | |
892 | challenge = buffer_get_string(&m, NULL); | |
893 | buffer_free(&m); | |
894 | ||
895 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
896 | (*prompts)[0] = challenge; | |
897 | ||
f5799ae1 | 898 | debug3("%s: received challenge: %s", __func__, challenge); |
700318f3 | 899 | |
900 | return (0); | |
901 | } | |
902 | ||
903 | int | |
904 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
905 | { | |
906 | Buffer m; | |
907 | int authok; | |
908 | ||
f5799ae1 | 909 | debug3("%s: entering", __func__); |
700318f3 | 910 | if (numresponses != 1) |
911 | return (-1); | |
912 | ||
913 | buffer_init(&m); | |
914 | buffer_put_cstring(&m, responses[0]); | |
915 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); | |
916 | ||
917 | mm_request_receive_expect(pmonitor->m_recvfd, | |
918 | MONITOR_ANS_BSDAUTHRESPOND, &m); | |
919 | ||
920 | authok = buffer_get_int(&m); | |
921 | buffer_free(&m); | |
922 | ||
923 | return ((authok == 0) ? -1 : 0); | |
924 | } | |
925 | ||
c9f39d2c | 926 | #ifdef SKEY |
700318f3 | 927 | int |
928 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
929 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
930 | { | |
931 | Buffer m; | |
6a9b3198 | 932 | int len; |
933 | u_int success; | |
700318f3 | 934 | char *p, *challenge; |
935 | ||
f5799ae1 | 936 | debug3("%s: entering", __func__); |
700318f3 | 937 | |
938 | buffer_init(&m); | |
939 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); | |
940 | ||
941 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, | |
942 | &m); | |
6a9b3198 | 943 | success = buffer_get_int(&m); |
944 | if (success == 0) { | |
f5799ae1 | 945 | debug3("%s: no challenge", __func__); |
700318f3 | 946 | buffer_free(&m); |
947 | return (-1); | |
948 | } | |
949 | ||
950 | /* Get the challenge, and format the response */ | |
951 | challenge = buffer_get_string(&m, NULL); | |
952 | buffer_free(&m); | |
953 | ||
f5799ae1 | 954 | debug3("%s: received challenge: %s", __func__, challenge); |
700318f3 | 955 | |
956 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
957 | ||
958 | len = strlen(challenge) + strlen(SKEY_PROMPT) + 1; | |
959 | p = xmalloc(len); | |
960 | strlcpy(p, challenge, len); | |
961 | strlcat(p, SKEY_PROMPT, len); | |
962 | (*prompts)[0] = p; | |
963 | xfree(challenge); | |
964 | ||
965 | return (0); | |
966 | } | |
967 | ||
968 | int | |
969 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
970 | { | |
971 | Buffer m; | |
972 | int authok; | |
973 | ||
f5799ae1 | 974 | debug3("%s: entering", __func__); |
700318f3 | 975 | if (numresponses != 1) |
976 | return (-1); | |
977 | ||
978 | buffer_init(&m); | |
979 | buffer_put_cstring(&m, responses[0]); | |
980 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); | |
981 | ||
982 | mm_request_receive_expect(pmonitor->m_recvfd, | |
983 | MONITOR_ANS_SKEYRESPOND, &m); | |
984 | ||
985 | authok = buffer_get_int(&m); | |
986 | buffer_free(&m); | |
987 | ||
988 | return ((authok == 0) ? -1 : 0); | |
989 | } | |
c9f39d2c | 990 | #endif /* SKEY */ |
700318f3 | 991 | |
992 | void | |
993 | mm_ssh1_session_id(u_char session_id[16]) | |
994 | { | |
995 | Buffer m; | |
996 | int i; | |
997 | ||
f5799ae1 | 998 | debug3("%s entering", __func__); |
700318f3 | 999 | |
1000 | buffer_init(&m); | |
1001 | for (i = 0; i < 16; i++) | |
1002 | buffer_put_char(&m, session_id[i]); | |
1003 | ||
1004 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); | |
1005 | buffer_free(&m); | |
1006 | } | |
1007 | ||
1008 | int | |
1009 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1010 | { | |
1011 | Buffer m; | |
1012 | Key *key; | |
1013 | u_char *blob; | |
1014 | u_int blen; | |
6a9b3198 | 1015 | int allowed = 0, have_forced = 0; |
700318f3 | 1016 | |
f5799ae1 | 1017 | debug3("%s entering", __func__); |
700318f3 | 1018 | |
1019 | buffer_init(&m); | |
1020 | buffer_put_bignum2(&m, client_n); | |
1021 | ||
1022 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); | |
1023 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1024 | ||
1025 | allowed = buffer_get_int(&m); | |
1026 | ||
6a9b3198 | 1027 | /* fake forced command */ |
1028 | auth_clear_options(); | |
1029 | have_forced = buffer_get_int(&m); | |
1030 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1031 | ||
700318f3 | 1032 | if (allowed && rkey != NULL) { |
1033 | blob = buffer_get_string(&m, &blen); | |
1034 | if ((key = key_from_blob(blob, blen)) == NULL) | |
f5799ae1 | 1035 | fatal("%s: key_from_blob failed", __func__); |
700318f3 | 1036 | *rkey = key; |
1037 | xfree(blob); | |
1038 | } | |
1039 | mm_send_debug(&m); | |
1040 | buffer_free(&m); | |
1041 | ||
1042 | return (allowed); | |
1043 | } | |
1044 | ||
1045 | BIGNUM * | |
1046 | mm_auth_rsa_generate_challenge(Key *key) | |
1047 | { | |
1048 | Buffer m; | |
1049 | BIGNUM *challenge; | |
1050 | u_char *blob; | |
1051 | u_int blen; | |
1052 | ||
f5799ae1 | 1053 | debug3("%s entering", __func__); |
700318f3 | 1054 | |
1055 | if ((challenge = BN_new()) == NULL) | |
f5799ae1 | 1056 | fatal("%s: BN_new failed", __func__); |
700318f3 | 1057 | |
1058 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1059 | if (key_to_blob(key, &blob, &blen) == 0) | |
f5799ae1 | 1060 | fatal("%s: key_to_blob failed", __func__); |
700318f3 | 1061 | key->type = KEY_RSA1; |
1062 | ||
1063 | buffer_init(&m); | |
1064 | buffer_put_string(&m, blob, blen); | |
1065 | xfree(blob); | |
1066 | ||
1067 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); | |
1068 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1069 | ||
1070 | buffer_get_bignum2(&m, challenge); | |
1071 | buffer_free(&m); | |
1072 | ||
1073 | return (challenge); | |
1074 | } | |
1075 | ||
1076 | int | |
1077 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1078 | { | |
1079 | Buffer m; | |
1080 | u_char *blob; | |
1081 | u_int blen; | |
1082 | int success = 0; | |
1083 | ||
f5799ae1 | 1084 | debug3("%s entering", __func__); |
700318f3 | 1085 | |
1086 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1087 | if (key_to_blob(key, &blob, &blen) == 0) | |
f5799ae1 | 1088 | fatal("%s: key_to_blob failed", __func__); |
700318f3 | 1089 | key->type = KEY_RSA1; |
1090 | ||
1091 | buffer_init(&m); | |
1092 | buffer_put_string(&m, blob, blen); | |
1093 | buffer_put_string(&m, response, 16); | |
1094 | xfree(blob); | |
1095 | ||
1096 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); | |
1097 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1098 | ||
1099 | success = buffer_get_int(&m); | |
1100 | buffer_free(&m); | |
1101 | ||
1102 | return (success); | |
1103 | } | |
41b2f314 | 1104 | |
996d5e62 | 1105 | #ifdef SSH_AUDIT_EVENTS |
1106 | void | |
1107 | mm_audit_event(ssh_audit_event_t event) | |
1108 | { | |
1109 | Buffer m; | |
1110 | ||
1111 | debug3("%s entering", __func__); | |
1112 | ||
1113 | buffer_init(&m); | |
1114 | buffer_put_int(&m, event); | |
1115 | ||
1116 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1117 | buffer_free(&m); | |
1118 | } | |
1119 | ||
1120 | void | |
1121 | mm_audit_run_command(const char *command) | |
1122 | { | |
1123 | Buffer m; | |
1124 | ||
1125 | debug3("%s entering command %s", __func__, command); | |
1126 | ||
1127 | buffer_init(&m); | |
1128 | buffer_put_cstring(&m, command); | |
1129 | ||
1130 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1131 | buffer_free(&m); | |
1132 | } | |
1133 | #endif /* SSH_AUDIT_EVENTS */ | |
1134 | ||
0fff78ff | 1135 | #ifdef GSSAPI |
1136 | OM_uint32 | |
c9f39d2c | 1137 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
41b2f314 | 1138 | { |
0fff78ff | 1139 | Buffer m; |
1140 | OM_uint32 major; | |
41b2f314 | 1141 | |
0fff78ff | 1142 | /* Client doesn't get to see the context */ |
1143 | *ctx = NULL; | |
41b2f314 | 1144 | |
1145 | buffer_init(&m); | |
c9f39d2c | 1146 | buffer_put_string(&m, goid->elements, goid->length); |
41b2f314 | 1147 | |
0fff78ff | 1148 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); |
1149 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1150 | ||
1151 | major = buffer_get_int(&m); | |
41b2f314 | 1152 | |
41b2f314 | 1153 | buffer_free(&m); |
0fff78ff | 1154 | return (major); |
41b2f314 | 1155 | } |
41b2f314 | 1156 | |
0fff78ff | 1157 | OM_uint32 |
1158 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1159 | gss_buffer_desc *out, OM_uint32 *flags) | |
41b2f314 | 1160 | { |
41b2f314 | 1161 | Buffer m; |
0fff78ff | 1162 | OM_uint32 major; |
1163 | u_int len; | |
41b2f314 | 1164 | |
1165 | buffer_init(&m); | |
0fff78ff | 1166 | buffer_put_string(&m, in->value, in->length); |
41b2f314 | 1167 | |
0fff78ff | 1168 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); |
1169 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
41b2f314 | 1170 | |
0fff78ff | 1171 | major = buffer_get_int(&m); |
1172 | out->value = buffer_get_string(&m, &len); | |
1173 | out->length = len; | |
1174 | if (flags) | |
1175 | *flags = buffer_get_int(&m); | |
41b2f314 | 1176 | |
0fff78ff | 1177 | buffer_free(&m); |
1178 | ||
1179 | return (major); | |
1180 | } | |
1181 | ||
cdd66111 | 1182 | OM_uint32 |
1183 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1184 | { | |
1185 | Buffer m; | |
1186 | OM_uint32 major; | |
1187 | ||
1188 | buffer_init(&m); | |
1189 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1190 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1191 | ||
1192 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1193 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1194 | &m); | |
1195 | ||
1196 | major = buffer_get_int(&m); | |
1197 | buffer_free(&m); | |
1198 | return(major); | |
1199 | } | |
1200 | ||
0fff78ff | 1201 | int |
1202 | mm_ssh_gssapi_userok(char *user) | |
1203 | { | |
1204 | Buffer m; | |
1205 | int authenticated = 0; | |
1206 | ||
1207 | buffer_init(&m); | |
1208 | ||
1209 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1210 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1211 | &m); | |
1212 | ||
1213 | authenticated = buffer_get_int(&m); | |
41b2f314 | 1214 | |
1215 | buffer_free(&m); | |
0fff78ff | 1216 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); |
1217 | return (authenticated); | |
41b2f314 | 1218 | } |
0fff78ff | 1219 | #endif /* GSSAPI */ |