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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" | |
2362db19 | 28 | RCSID("$OpenBSD: monitor_wrap.c,v 1.32 2003/09/23 20:17:11 markus 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" | |
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" | |
7fceb20d | 50 | #include "servconf.h" |
1853d1ef | 51 | |
52 | #include "auth.h" | |
53 | #include "channels.h" | |
54 | #include "session.h" | |
55 | ||
7364bd04 | 56 | #ifdef GSSAPI |
57 | #include "ssh-gss.h" | |
58 | #endif | |
59 | ||
1853d1ef | 60 | /* Imports */ |
61 | extern int compat20; | |
62 | extern Newkeys *newkeys[]; | |
63 | extern z_stream incoming_stream; | |
64 | extern z_stream outgoing_stream; | |
b5a28cbc | 65 | extern struct monitor *pmonitor; |
1853d1ef | 66 | extern Buffer input, output; |
7fceb20d | 67 | extern ServerOptions options; |
1853d1ef | 68 | |
2362db19 | 69 | int |
70 | mm_is_monitor(void) | |
71 | { | |
72 | /* | |
73 | * m_pid is only set in the privileged part, and | |
74 | * points to the unprivileged child. | |
75 | */ | |
76 | return (pmonitor->m_pid > 0); | |
77 | } | |
78 | ||
1853d1ef | 79 | void |
80 | mm_request_send(int socket, enum monitor_reqtype type, Buffer *m) | |
81 | { | |
1853d1ef | 82 | u_int mlen = buffer_len(m); |
405a0d43 | 83 | u_char buf[5]; |
1853d1ef | 84 | |
1588c277 | 85 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 86 | |
87 | PUT_32BIT(buf, mlen + 1); | |
7203d6bb | 88 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
dc54438a | 89 | if (atomicio(vwrite, socket, buf, sizeof(buf)) != sizeof(buf)) |
1588c277 | 90 | fatal("%s: write", __func__); |
dc54438a | 91 | if (atomicio(vwrite, socket, buffer_ptr(m), mlen) != mlen) |
1588c277 | 92 | fatal("%s: write", __func__); |
1853d1ef | 93 | } |
94 | ||
95 | void | |
96 | mm_request_receive(int socket, Buffer *m) | |
97 | { | |
98 | u_char buf[4]; | |
1853d1ef | 99 | u_int msg_len; |
405a0d43 | 100 | ssize_t res; |
1853d1ef | 101 | |
1588c277 | 102 | debug3("%s entering", __func__); |
1853d1ef | 103 | |
104 | res = atomicio(read, socket, buf, sizeof(buf)); | |
105 | if (res != sizeof(buf)) { | |
106 | if (res == 0) | |
2362db19 | 107 | cleanup_exit(255); |
1588c277 | 108 | fatal("%s: read: %ld", __func__, (long)res); |
1853d1ef | 109 | } |
110 | msg_len = GET_32BIT(buf); | |
111 | if (msg_len > 256 * 1024) | |
1588c277 | 112 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 113 | buffer_clear(m); |
114 | buffer_append_space(m, msg_len); | |
115 | res = atomicio(read, socket, buffer_ptr(m), msg_len); | |
116 | if (res != msg_len) | |
1588c277 | 117 | fatal("%s: read: %ld != msg_len", __func__, (long)res); |
1853d1ef | 118 | } |
119 | ||
120 | void | |
121 | mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m) | |
122 | { | |
123 | u_char rtype; | |
124 | ||
1588c277 | 125 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 126 | |
127 | mm_request_receive(socket, m); | |
128 | rtype = buffer_get_char(m); | |
129 | if (rtype != type) | |
1588c277 | 130 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 131 | rtype, type); |
132 | } | |
133 | ||
134 | DH * | |
135 | mm_choose_dh(int min, int nbits, int max) | |
136 | { | |
137 | BIGNUM *p, *g; | |
138 | int success = 0; | |
139 | Buffer m; | |
140 | ||
141 | buffer_init(&m); | |
142 | buffer_put_int(&m, min); | |
143 | buffer_put_int(&m, nbits); | |
144 | buffer_put_int(&m, max); | |
145 | ||
b5a28cbc | 146 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 147 | |
1588c277 | 148 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 149 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 150 | |
151 | success = buffer_get_char(&m); | |
152 | if (success == 0) | |
1588c277 | 153 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 154 | |
155 | if ((p = BN_new()) == NULL) | |
1588c277 | 156 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 157 | if ((g = BN_new()) == NULL) |
1588c277 | 158 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 159 | buffer_get_bignum2(&m, p); |
160 | buffer_get_bignum2(&m, g); | |
161 | ||
1588c277 | 162 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 163 | buffer_free(&m); |
164 | ||
165 | return (dh_new_group(g, p)); | |
166 | } | |
167 | ||
168 | int | |
169 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
170 | { | |
b5a28cbc | 171 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 172 | Buffer m; |
173 | ||
1588c277 | 174 | debug3("%s entering", __func__); |
1853d1ef | 175 | |
176 | buffer_init(&m); | |
177 | buffer_put_int(&m, kex->host_key_index(key)); | |
178 | buffer_put_string(&m, data, datalen); | |
179 | ||
b5a28cbc | 180 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 181 | |
1588c277 | 182 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 183 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 184 | *sigp = buffer_get_string(&m, lenp); |
185 | buffer_free(&m); | |
186 | ||
187 | return (0); | |
188 | } | |
189 | ||
190 | struct passwd * | |
191 | mm_getpwnamallow(const char *login) | |
192 | { | |
193 | Buffer m; | |
194 | struct passwd *pw; | |
195 | u_int pwlen; | |
196 | ||
1588c277 | 197 | debug3("%s entering", __func__); |
1853d1ef | 198 | |
199 | buffer_init(&m); | |
200 | buffer_put_cstring(&m, login); | |
201 | ||
b5a28cbc | 202 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 203 | |
1588c277 | 204 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 205 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 206 | |
207 | if (buffer_get_char(&m) == 0) { | |
208 | buffer_free(&m); | |
209 | return (NULL); | |
210 | } | |
211 | pw = buffer_get_string(&m, &pwlen); | |
212 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 213 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 214 | pw->pw_name = buffer_get_string(&m, NULL); |
215 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
216 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 217 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 218 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 219 | #endif |
1853d1ef | 220 | pw->pw_dir = buffer_get_string(&m, NULL); |
221 | pw->pw_shell = buffer_get_string(&m, NULL); | |
222 | buffer_free(&m); | |
223 | ||
224 | return (pw); | |
225 | } | |
226 | ||
343288b8 | 227 | char *mm_auth2_read_banner(void) |
94a73cdc | 228 | { |
229 | Buffer m; | |
230 | char *banner; | |
231 | ||
1588c277 | 232 | debug3("%s entering", __func__); |
94a73cdc | 233 | |
234 | buffer_init(&m); | |
b5a28cbc | 235 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 236 | buffer_clear(&m); |
237 | ||
b5a28cbc | 238 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTH2_READ_BANNER, &m); |
94a73cdc | 239 | banner = buffer_get_string(&m, NULL); |
240 | buffer_free(&m); | |
7203d6bb | 241 | |
94a73cdc | 242 | return (banner); |
243 | } | |
244 | ||
1853d1ef | 245 | /* Inform the privileged process about service and style */ |
246 | ||
247 | void | |
248 | mm_inform_authserv(char *service, char *style) | |
249 | { | |
250 | Buffer m; | |
251 | ||
1588c277 | 252 | debug3("%s entering", __func__); |
1853d1ef | 253 | |
254 | buffer_init(&m); | |
255 | buffer_put_cstring(&m, service); | |
256 | buffer_put_cstring(&m, style ? style : ""); | |
257 | ||
b5a28cbc | 258 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 259 | |
260 | buffer_free(&m); | |
261 | } | |
262 | ||
263 | /* Do the password authentication */ | |
264 | int | |
265 | mm_auth_password(Authctxt *authctxt, char *password) | |
266 | { | |
267 | Buffer m; | |
268 | int authenticated = 0; | |
269 | ||
1588c277 | 270 | debug3("%s entering", __func__); |
1853d1ef | 271 | |
272 | buffer_init(&m); | |
273 | buffer_put_cstring(&m, password); | |
b5a28cbc | 274 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 275 | |
1588c277 | 276 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 277 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 278 | |
279 | authenticated = buffer_get_int(&m); | |
280 | ||
281 | buffer_free(&m); | |
282 | ||
283 | debug3("%s: user %sauthenticated", | |
1588c277 | 284 | __func__, authenticated ? "" : "not "); |
1853d1ef | 285 | return (authenticated); |
286 | } | |
287 | ||
288 | int | |
289 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
290 | { | |
291 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
292 | } | |
293 | ||
294 | int | |
295 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
296 | Key *key) | |
297 | { | |
298 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
299 | } | |
300 | ||
301 | int | |
302 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
303 | char *host, Key *key) | |
304 | { | |
305 | int ret; | |
306 | ||
307 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
308 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
309 | key->type = KEY_RSA1; | |
310 | return (ret); | |
311 | } | |
312 | ||
313 | static void | |
314 | mm_send_debug(Buffer *m) | |
315 | { | |
316 | char *msg; | |
317 | ||
318 | while (buffer_len(m)) { | |
319 | msg = buffer_get_string(m, NULL); | |
1588c277 | 320 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 321 | packet_send_debug("%s", msg); |
322 | xfree(msg); | |
323 | } | |
324 | } | |
325 | ||
326 | int | |
327 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
328 | { | |
329 | Buffer m; | |
330 | u_char *blob; | |
331 | u_int len; | |
92e15201 | 332 | int allowed = 0, have_forced = 0; |
1853d1ef | 333 | |
1588c277 | 334 | debug3("%s entering", __func__); |
1853d1ef | 335 | |
336 | /* Convert the key to a blob and the pass it over */ | |
337 | if (!key_to_blob(key, &blob, &len)) | |
338 | return (0); | |
339 | ||
340 | buffer_init(&m); | |
341 | buffer_put_int(&m, type); | |
342 | buffer_put_cstring(&m, user ? user : ""); | |
343 | buffer_put_cstring(&m, host ? host : ""); | |
344 | buffer_put_string(&m, blob, len); | |
345 | xfree(blob); | |
346 | ||
b5a28cbc | 347 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 348 | |
1588c277 | 349 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 350 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 351 | |
352 | allowed = buffer_get_int(&m); | |
353 | ||
92e15201 | 354 | /* fake forced command */ |
355 | auth_clear_options(); | |
356 | have_forced = buffer_get_int(&m); | |
357 | forced_command = have_forced ? xstrdup("true") : NULL; | |
358 | ||
1853d1ef | 359 | /* Send potential debug messages */ |
360 | mm_send_debug(&m); | |
361 | ||
362 | buffer_free(&m); | |
363 | ||
364 | return (allowed); | |
365 | } | |
366 | ||
367 | /* | |
368 | * This key verify needs to send the key type along, because the | |
369 | * privileged parent makes the decision if the key is allowed | |
370 | * for authentication. | |
371 | */ | |
372 | ||
373 | int | |
374 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
375 | { | |
376 | Buffer m; | |
377 | u_char *blob; | |
378 | u_int len; | |
379 | int verified = 0; | |
380 | ||
1588c277 | 381 | debug3("%s entering", __func__); |
1853d1ef | 382 | |
383 | /* Convert the key to a blob and the pass it over */ | |
384 | if (!key_to_blob(key, &blob, &len)) | |
385 | return (0); | |
386 | ||
387 | buffer_init(&m); | |
388 | buffer_put_string(&m, blob, len); | |
389 | buffer_put_string(&m, sig, siglen); | |
390 | buffer_put_string(&m, data, datalen); | |
391 | xfree(blob); | |
392 | ||
b5a28cbc | 393 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 394 | |
1588c277 | 395 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 396 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 397 | |
398 | verified = buffer_get_int(&m); | |
399 | ||
400 | buffer_free(&m); | |
401 | ||
402 | return (verified); | |
403 | } | |
404 | ||
405 | /* Export key state after authentication */ | |
406 | Newkeys * | |
407 | mm_newkeys_from_blob(u_char *blob, int blen) | |
408 | { | |
409 | Buffer b; | |
410 | u_int len; | |
411 | Newkeys *newkey = NULL; | |
412 | Enc *enc; | |
413 | Mac *mac; | |
414 | Comp *comp; | |
415 | ||
1588c277 | 416 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 417 | #ifdef DEBUG_PK |
418 | dump_base64(stderr, blob, blen); | |
419 | #endif | |
420 | buffer_init(&b); | |
421 | buffer_append(&b, blob, blen); | |
422 | ||
423 | newkey = xmalloc(sizeof(*newkey)); | |
424 | enc = &newkey->enc; | |
425 | mac = &newkey->mac; | |
426 | comp = &newkey->comp; | |
427 | ||
428 | /* Enc structure */ | |
429 | enc->name = buffer_get_string(&b, NULL); | |
430 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
431 | enc->enabled = buffer_get_int(&b); | |
432 | enc->block_size = buffer_get_int(&b); | |
433 | enc->key = buffer_get_string(&b, &enc->key_len); | |
434 | enc->iv = buffer_get_string(&b, &len); | |
435 | if (len != enc->block_size) | |
bb0640b2 | 436 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 437 | enc->block_size, len); |
438 | ||
439 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 440 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 441 | enc->name, enc->cipher); |
442 | ||
443 | /* Mac structure */ | |
444 | mac->name = buffer_get_string(&b, NULL); | |
445 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 446 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 447 | mac->enabled = buffer_get_int(&b); |
448 | mac->key = buffer_get_string(&b, &len); | |
449 | if (len > mac->key_len) | |
bb0640b2 | 450 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 451 | mac->key_len); |
452 | mac->key_len = len; | |
453 | ||
454 | /* Comp structure */ | |
455 | comp->type = buffer_get_int(&b); | |
456 | comp->enabled = buffer_get_int(&b); | |
457 | comp->name = buffer_get_string(&b, NULL); | |
458 | ||
459 | len = buffer_len(&b); | |
460 | if (len != 0) | |
bb0640b2 | 461 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 462 | buffer_free(&b); |
463 | return (newkey); | |
464 | } | |
465 | ||
466 | int | |
467 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
468 | { | |
469 | Buffer b; | |
470 | int len; | |
1853d1ef | 471 | Enc *enc; |
472 | Mac *mac; | |
473 | Comp *comp; | |
474 | Newkeys *newkey = newkeys[mode]; | |
475 | ||
1588c277 | 476 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 477 | |
478 | if (newkey == NULL) { | |
1588c277 | 479 | error("%s: newkey == NULL", __func__); |
1853d1ef | 480 | return 0; |
481 | } | |
482 | enc = &newkey->enc; | |
483 | mac = &newkey->mac; | |
484 | comp = &newkey->comp; | |
485 | ||
486 | buffer_init(&b); | |
487 | /* Enc structure */ | |
488 | buffer_put_cstring(&b, enc->name); | |
489 | /* The cipher struct is constant and shared, you export pointer */ | |
490 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
491 | buffer_put_int(&b, enc->enabled); | |
492 | buffer_put_int(&b, enc->block_size); | |
493 | buffer_put_string(&b, enc->key, enc->key_len); | |
494 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
495 | buffer_put_string(&b, enc->iv, enc->block_size); | |
496 | ||
497 | /* Mac structure */ | |
498 | buffer_put_cstring(&b, mac->name); | |
499 | buffer_put_int(&b, mac->enabled); | |
500 | buffer_put_string(&b, mac->key, mac->key_len); | |
501 | ||
502 | /* Comp structure */ | |
503 | buffer_put_int(&b, comp->type); | |
504 | buffer_put_int(&b, comp->enabled); | |
505 | buffer_put_cstring(&b, comp->name); | |
506 | ||
507 | len = buffer_len(&b); | |
1853d1ef | 508 | if (lenp != NULL) |
509 | *lenp = len; | |
eb9f2fab | 510 | if (blobp != NULL) { |
511 | *blobp = xmalloc(len); | |
512 | memcpy(*blobp, buffer_ptr(&b), len); | |
513 | } | |
514 | memset(buffer_ptr(&b), 0, len); | |
515 | buffer_free(&b); | |
1853d1ef | 516 | return len; |
517 | } | |
518 | ||
519 | static void | |
520 | mm_send_kex(Buffer *m, Kex *kex) | |
521 | { | |
522 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
523 | buffer_put_int(m, kex->we_need); | |
524 | buffer_put_int(m, kex->hostkey_type); | |
525 | buffer_put_int(m, kex->kex_type); | |
526 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
527 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
528 | buffer_put_int(m, kex->flags); | |
529 | buffer_put_cstring(m, kex->client_version_string); | |
530 | buffer_put_cstring(m, kex->server_version_string); | |
531 | } | |
532 | ||
533 | void | |
b5a28cbc | 534 | mm_send_keystate(struct monitor *pmonitor) |
1853d1ef | 535 | { |
536 | Buffer m; | |
537 | u_char *blob, *p; | |
538 | u_int bloblen, plen; | |
ffd7b36b | 539 | u_int32_t seqnr, packets; |
540 | u_int64_t blocks; | |
1853d1ef | 541 | |
542 | buffer_init(&m); | |
543 | ||
544 | if (!compat20) { | |
545 | u_char iv[24]; | |
9459414c | 546 | u_char *key; |
547 | u_int ivlen, keylen; | |
1853d1ef | 548 | |
549 | buffer_put_int(&m, packet_get_protocol_flags()); | |
550 | ||
551 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
552 | ||
9459414c | 553 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
554 | keylen = packet_get_encryption_key(NULL); | |
555 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
556 | keylen = packet_get_encryption_key(key); | |
557 | buffer_put_string(&m, key, keylen); | |
558 | memset(key, 0, keylen); | |
559 | xfree(key); | |
560 | ||
1853d1ef | 561 | ivlen = packet_get_keyiv_len(MODE_OUT); |
562 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
563 | buffer_put_string(&m, iv, ivlen); | |
564 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
565 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
566 | buffer_put_string(&m, iv, ivlen); | |
567 | goto skip; | |
568 | } else { | |
569 | /* Kex for rekeying */ | |
b5a28cbc | 570 | mm_send_kex(&m, *pmonitor->m_pkex); |
1853d1ef | 571 | } |
572 | ||
573 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 574 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 575 | |
576 | /* Keys from Kex */ | |
577 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 578 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 579 | |
580 | buffer_put_string(&m, blob, bloblen); | |
581 | xfree(blob); | |
582 | ||
583 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 584 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 585 | |
586 | buffer_put_string(&m, blob, bloblen); | |
587 | xfree(blob); | |
588 | ||
ffd7b36b | 589 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
590 | buffer_put_int(&m, seqnr); | |
591 | buffer_put_int64(&m, blocks); | |
592 | buffer_put_int(&m, packets); | |
806e4c11 | 593 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 594 | buffer_put_int(&m, seqnr); |
595 | buffer_put_int64(&m, blocks); | |
596 | buffer_put_int(&m, packets); | |
1853d1ef | 597 | |
1588c277 | 598 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 599 | skip: |
600 | /* More key context */ | |
601 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
602 | p = xmalloc(plen+1); | |
603 | packet_get_keycontext(MODE_OUT, p); | |
604 | buffer_put_string(&m, p, plen); | |
605 | xfree(p); | |
606 | ||
607 | plen = packet_get_keycontext(MODE_IN, NULL); | |
608 | p = xmalloc(plen+1); | |
609 | packet_get_keycontext(MODE_IN, p); | |
610 | buffer_put_string(&m, p, plen); | |
611 | xfree(p); | |
612 | ||
613 | /* Compression state */ | |
1588c277 | 614 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 615 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
616 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
617 | ||
618 | /* Network I/O buffers */ | |
619 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
620 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
621 | ||
b5a28cbc | 622 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 623 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 624 | |
625 | buffer_free(&m); | |
626 | } | |
627 | ||
628 | int | |
629 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) | |
630 | { | |
631 | Buffer m; | |
661e45a0 | 632 | char *p; |
1853d1ef | 633 | int success = 0; |
634 | ||
635 | buffer_init(&m); | |
b5a28cbc | 636 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 637 | |
1588c277 | 638 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 639 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 640 | |
641 | success = buffer_get_int(&m); | |
642 | if (success == 0) { | |
1588c277 | 643 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 644 | buffer_free(&m); |
645 | return (0); | |
646 | } | |
647 | p = buffer_get_string(&m, NULL); | |
648 | buffer_free(&m); | |
649 | ||
650 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
651 | xfree(p); | |
652 | ||
b5a28cbc | 653 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
654 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 655 | |
656 | /* Success */ | |
657 | return (1); | |
658 | } | |
659 | ||
660 | void | |
2362db19 | 661 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 662 | { |
1853d1ef | 663 | Buffer m; |
664 | ||
665 | if (s->ttyfd == -1) | |
666 | return; | |
667 | buffer_init(&m); | |
668 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 669 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 670 | buffer_free(&m); |
671 | ||
672 | /* closed dup'ed master */ | |
673 | if (close(s->ptymaster) < 0) | |
674 | error("close(s->ptymaster): %s", strerror(errno)); | |
675 | ||
676 | /* unlink pty from session */ | |
677 | s->ttyfd = -1; | |
678 | } | |
679 | ||
ad200abb | 680 | #ifdef USE_PAM |
681 | void | |
682 | mm_start_pam(char *user) | |
683 | { | |
684 | Buffer m; | |
685 | ||
1588c277 | 686 | debug3("%s entering", __func__); |
7fceb20d | 687 | if (!options.use_pam) |
688 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 689 | |
690 | buffer_init(&m); | |
691 | buffer_put_cstring(&m, user); | |
692 | ||
b5a28cbc | 693 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 694 | |
695 | buffer_free(&m); | |
696 | } | |
05114c74 | 697 | |
5b9e2464 | 698 | u_int |
699 | mm_do_pam_account(void) | |
700 | { | |
701 | Buffer m; | |
702 | u_int ret; | |
703 | ||
704 | debug3("%s entering", __func__); | |
705 | if (!options.use_pam) | |
706 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
707 | ||
708 | buffer_init(&m); | |
709 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
710 | ||
711 | mm_request_receive_expect(pmonitor->m_recvfd, | |
712 | MONITOR_ANS_PAM_ACCOUNT, &m); | |
713 | ret = buffer_get_int(&m); | |
714 | ||
715 | buffer_free(&m); | |
716 | ||
717 | debug3("%s returning %d", __func__, ret); | |
718 | ||
719 | return (ret); | |
720 | } | |
721 | ||
05114c74 | 722 | void * |
723 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
724 | { | |
725 | Buffer m; | |
726 | int success; | |
727 | ||
728 | debug3("%s", __func__); | |
729 | buffer_init(&m); | |
730 | buffer_put_cstring(&m, authctxt->user); | |
731 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
732 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
733 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
734 | success = buffer_get_int(&m); | |
735 | if (success == 0) { | |
736 | debug3("%s: pam_init_ctx failed", __func__); | |
737 | buffer_free(&m); | |
738 | return (NULL); | |
739 | } | |
740 | buffer_free(&m); | |
741 | return (authctxt); | |
742 | } | |
743 | ||
744 | int | |
745 | mm_sshpam_query(void *ctx, char **name, char **info, | |
746 | u_int *num, char ***prompts, u_int **echo_on) | |
747 | { | |
748 | Buffer m; | |
749 | int i, ret; | |
750 | ||
751 | debug3("%s", __func__); | |
752 | buffer_init(&m); | |
753 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
754 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
755 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
756 | ret = buffer_get_int(&m); | |
757 | debug3("%s: pam_query returned %d", __func__, ret); | |
758 | *name = buffer_get_string(&m, NULL); | |
759 | *info = buffer_get_string(&m, NULL); | |
760 | *num = buffer_get_int(&m); | |
761 | *prompts = xmalloc((*num + 1) * sizeof(char *)); | |
762 | *echo_on = xmalloc((*num + 1) * sizeof(u_int)); | |
763 | for (i = 0; i < *num; ++i) { | |
764 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
765 | (*echo_on)[i] = buffer_get_int(&m); | |
766 | } | |
767 | buffer_free(&m); | |
768 | return (ret); | |
769 | } | |
770 | ||
771 | int | |
772 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
773 | { | |
774 | Buffer m; | |
775 | int i, ret; | |
776 | ||
777 | debug3("%s", __func__); | |
778 | buffer_init(&m); | |
779 | buffer_put_int(&m, num); | |
780 | for (i = 0; i < num; ++i) | |
781 | buffer_put_cstring(&m, resp[i]); | |
782 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
783 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
784 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
785 | ret = buffer_get_int(&m); | |
786 | debug3("%s: pam_respond returned %d", __func__, ret); | |
787 | buffer_free(&m); | |
788 | return (ret); | |
789 | } | |
790 | ||
791 | void | |
792 | mm_sshpam_free_ctx(void *ctxtp) | |
793 | { | |
794 | Buffer m; | |
795 | ||
796 | debug3("%s", __func__); | |
797 | buffer_init(&m); | |
798 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
799 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
800 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
801 | buffer_free(&m); | |
802 | } | |
ad200abb | 803 | #endif /* USE_PAM */ |
804 | ||
1853d1ef | 805 | /* Request process termination */ |
806 | ||
807 | void | |
808 | mm_terminate(void) | |
809 | { | |
810 | Buffer m; | |
811 | ||
812 | buffer_init(&m); | |
b5a28cbc | 813 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 814 | buffer_free(&m); |
815 | } | |
816 | ||
817 | int | |
818 | mm_ssh1_session_key(BIGNUM *num) | |
819 | { | |
820 | int rsafail; | |
821 | Buffer m; | |
822 | ||
823 | buffer_init(&m); | |
824 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 825 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 826 | |
b5a28cbc | 827 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 828 | |
829 | rsafail = buffer_get_int(&m); | |
830 | buffer_get_bignum2(&m, num); | |
831 | ||
832 | buffer_free(&m); | |
833 | ||
834 | return (rsafail); | |
835 | } | |
836 | ||
837 | static void | |
838 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
839 | char ***prompts, u_int **echo_on) | |
840 | { | |
7203d6bb | 841 | *name = xstrdup(""); |
842 | *infotxt = xstrdup(""); | |
1853d1ef | 843 | *numprompts = 1; |
343288b8 | 844 | *prompts = xmalloc(*numprompts * sizeof(char *)); |
1853d1ef | 845 | *echo_on = xmalloc(*numprompts * sizeof(u_int)); |
846 | (*echo_on)[0] = 0; | |
847 | } | |
848 | ||
849 | int | |
850 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
851 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
852 | { | |
853 | Buffer m; | |
6d6c25e3 | 854 | u_int success; |
1853d1ef | 855 | char *challenge; |
856 | ||
1588c277 | 857 | debug3("%s: entering", __func__); |
1853d1ef | 858 | |
859 | buffer_init(&m); | |
b5a28cbc | 860 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 861 | |
b5a28cbc | 862 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 863 | &m); |
6d6c25e3 | 864 | success = buffer_get_int(&m); |
865 | if (success == 0) { | |
1588c277 | 866 | debug3("%s: no challenge", __func__); |
1853d1ef | 867 | buffer_free(&m); |
868 | return (-1); | |
869 | } | |
870 | ||
871 | /* Get the challenge, and format the response */ | |
872 | challenge = buffer_get_string(&m, NULL); | |
873 | buffer_free(&m); | |
874 | ||
875 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
876 | (*prompts)[0] = challenge; | |
877 | ||
1588c277 | 878 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 879 | |
880 | return (0); | |
881 | } | |
882 | ||
883 | int | |
884 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
885 | { | |
886 | Buffer m; | |
887 | int authok; | |
888 | ||
1588c277 | 889 | debug3("%s: entering", __func__); |
1853d1ef | 890 | if (numresponses != 1) |
891 | return (-1); | |
892 | ||
893 | buffer_init(&m); | |
894 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 895 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 896 | |
b5a28cbc | 897 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 898 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
899 | ||
900 | authok = buffer_get_int(&m); | |
901 | buffer_free(&m); | |
902 | ||
903 | return ((authok == 0) ? -1 : 0); | |
904 | } | |
905 | ||
906 | int | |
907 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
908 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
909 | { | |
910 | Buffer m; | |
6d6c25e3 | 911 | int len; |
912 | u_int success; | |
1853d1ef | 913 | char *p, *challenge; |
914 | ||
1588c277 | 915 | debug3("%s: entering", __func__); |
1853d1ef | 916 | |
917 | buffer_init(&m); | |
b5a28cbc | 918 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 919 | |
b5a28cbc | 920 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 921 | &m); |
6d6c25e3 | 922 | success = buffer_get_int(&m); |
923 | if (success == 0) { | |
1588c277 | 924 | debug3("%s: no challenge", __func__); |
1853d1ef | 925 | buffer_free(&m); |
926 | return (-1); | |
927 | } | |
928 | ||
929 | /* Get the challenge, and format the response */ | |
930 | challenge = buffer_get_string(&m, NULL); | |
931 | buffer_free(&m); | |
932 | ||
1588c277 | 933 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 934 | |
935 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
936 | ||
937 | len = strlen(challenge) + strlen(SKEY_PROMPT) + 1; | |
938 | p = xmalloc(len); | |
939 | strlcpy(p, challenge, len); | |
940 | strlcat(p, SKEY_PROMPT, len); | |
941 | (*prompts)[0] = p; | |
942 | xfree(challenge); | |
943 | ||
944 | return (0); | |
945 | } | |
946 | ||
947 | int | |
948 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
949 | { | |
950 | Buffer m; | |
951 | int authok; | |
952 | ||
1588c277 | 953 | debug3("%s: entering", __func__); |
1853d1ef | 954 | if (numresponses != 1) |
955 | return (-1); | |
956 | ||
957 | buffer_init(&m); | |
958 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 959 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 960 | |
b5a28cbc | 961 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 962 | MONITOR_ANS_SKEYRESPOND, &m); |
963 | ||
964 | authok = buffer_get_int(&m); | |
965 | buffer_free(&m); | |
966 | ||
967 | return ((authok == 0) ? -1 : 0); | |
968 | } | |
969 | ||
970 | void | |
971 | mm_ssh1_session_id(u_char session_id[16]) | |
972 | { | |
973 | Buffer m; | |
974 | int i; | |
975 | ||
1588c277 | 976 | debug3("%s entering", __func__); |
1853d1ef | 977 | |
978 | buffer_init(&m); | |
979 | for (i = 0; i < 16; i++) | |
980 | buffer_put_char(&m, session_id[i]); | |
981 | ||
b5a28cbc | 982 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 983 | buffer_free(&m); |
984 | } | |
985 | ||
986 | int | |
987 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
988 | { | |
989 | Buffer m; | |
990 | Key *key; | |
991 | u_char *blob; | |
992 | u_int blen; | |
92e15201 | 993 | int allowed = 0, have_forced = 0; |
1853d1ef | 994 | |
1588c277 | 995 | debug3("%s entering", __func__); |
1853d1ef | 996 | |
997 | buffer_init(&m); | |
998 | buffer_put_bignum2(&m, client_n); | |
999 | ||
b5a28cbc | 1000 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1001 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1002 | |
1003 | allowed = buffer_get_int(&m); | |
1004 | ||
92e15201 | 1005 | /* fake forced command */ |
1006 | auth_clear_options(); | |
1007 | have_forced = buffer_get_int(&m); | |
1008 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1009 | ||
1853d1ef | 1010 | if (allowed && rkey != NULL) { |
1011 | blob = buffer_get_string(&m, &blen); | |
1012 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1013 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1014 | *rkey = key; |
1015 | xfree(blob); | |
1016 | } | |
1017 | mm_send_debug(&m); | |
1018 | buffer_free(&m); | |
1019 | ||
1020 | return (allowed); | |
1021 | } | |
1022 | ||
1023 | BIGNUM * | |
1024 | mm_auth_rsa_generate_challenge(Key *key) | |
1025 | { | |
1026 | Buffer m; | |
1027 | BIGNUM *challenge; | |
1028 | u_char *blob; | |
1029 | u_int blen; | |
1030 | ||
1588c277 | 1031 | debug3("%s entering", __func__); |
1853d1ef | 1032 | |
1033 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1034 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1035 | |
1036 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1037 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1038 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1039 | key->type = KEY_RSA1; |
1040 | ||
1041 | buffer_init(&m); | |
1042 | buffer_put_string(&m, blob, blen); | |
1043 | xfree(blob); | |
1044 | ||
b5a28cbc | 1045 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1046 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1047 | |
1048 | buffer_get_bignum2(&m, challenge); | |
1049 | buffer_free(&m); | |
1050 | ||
1051 | return (challenge); | |
1052 | } | |
1053 | ||
1054 | int | |
1055 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1056 | { | |
1057 | Buffer m; | |
1058 | u_char *blob; | |
1059 | u_int blen; | |
1060 | int success = 0; | |
1061 | ||
1588c277 | 1062 | debug3("%s entering", __func__); |
1853d1ef | 1063 | |
1064 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1065 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1066 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1067 | key->type = KEY_RSA1; |
1068 | ||
1069 | buffer_init(&m); | |
1070 | buffer_put_string(&m, blob, blen); | |
1071 | buffer_put_string(&m, response, 16); | |
1072 | xfree(blob); | |
1073 | ||
b5a28cbc | 1074 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1075 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1076 | |
1077 | success = buffer_get_int(&m); | |
1078 | buffer_free(&m); | |
1079 | ||
1080 | return (success); | |
1081 | } | |
696f6bef | 1082 | |
7364bd04 | 1083 | #ifdef GSSAPI |
1084 | OM_uint32 | |
1085 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid) | |
1086 | { | |
1087 | Buffer m; | |
1088 | OM_uint32 major; | |
1089 | ||
1090 | /* Client doesn't get to see the context */ | |
1091 | *ctx = NULL; | |
1092 | ||
1093 | buffer_init(&m); | |
1094 | buffer_put_string(&m, oid->elements, oid->length); | |
1095 | ||
1096 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1097 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1098 | ||
1099 | major = buffer_get_int(&m); | |
1100 | ||
1101 | buffer_free(&m); | |
1102 | return (major); | |
1103 | } | |
1104 | ||
1105 | OM_uint32 | |
1106 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1107 | gss_buffer_desc *out, OM_uint32 *flags) | |
1108 | { | |
1109 | Buffer m; | |
1110 | OM_uint32 major; | |
f99e1ca4 | 1111 | u_int len; |
7364bd04 | 1112 | |
1113 | buffer_init(&m); | |
1114 | buffer_put_string(&m, in->value, in->length); | |
1115 | ||
1116 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1117 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1118 | ||
1119 | major = buffer_get_int(&m); | |
f99e1ca4 | 1120 | out->value = buffer_get_string(&m, &len); |
1121 | out->length = len; | |
7364bd04 | 1122 | if (flags) |
1123 | *flags = buffer_get_int(&m); | |
1124 | ||
1125 | buffer_free(&m); | |
1126 | ||
1127 | return (major); | |
1128 | } | |
1129 | ||
1130 | int | |
1131 | mm_ssh_gssapi_userok(char *user) | |
1132 | { | |
1133 | Buffer m; | |
1134 | int authenticated = 0; | |
1135 | ||
1136 | buffer_init(&m); | |
1137 | ||
1138 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1139 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1140 | &m); | |
1141 | ||
1142 | authenticated = buffer_get_int(&m); | |
1143 | ||
1144 | buffer_free(&m); | |
1145 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1146 | return (authenticated); | |
1147 | } | |
1148 | #endif /* GSSAPI */ |