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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" | |
0789992b | 28 | RCSID("$OpenBSD: monitor_wrap.c,v 1.35 2003/11/17 11:06:07 markus Exp $"); |
1853d1ef | 29 | |
30 | #include <openssl/bn.h> | |
31 | #include <openssl/dh.h> | |
32 | ||
79753592 | 33 | #include "zlib.h" /* XXX Moved due to conflict on MacOS/X */ |
34 | ||
1853d1ef | 35 | #include "ssh.h" |
36 | #include "dh.h" | |
37 | #include "kex.h" | |
38 | #include "auth.h" | |
92e15201 | 39 | #include "auth-options.h" |
1853d1ef | 40 | #include "buffer.h" |
41 | #include "bufaux.h" | |
42 | #include "packet.h" | |
43 | #include "mac.h" | |
44 | #include "log.h" | |
1853d1ef | 45 | #include "monitor.h" |
46 | #include "monitor_wrap.h" | |
47 | #include "xmalloc.h" | |
48 | #include "atomicio.h" | |
49 | #include "monitor_fdpass.h" | |
50 | #include "getput.h" | |
7fceb20d | 51 | #include "servconf.h" |
1853d1ef | 52 | |
53 | #include "auth.h" | |
54 | #include "channels.h" | |
55 | #include "session.h" | |
56 | ||
7364bd04 | 57 | #ifdef GSSAPI |
58 | #include "ssh-gss.h" | |
59 | #endif | |
60 | ||
1853d1ef | 61 | /* Imports */ |
62 | extern int compat20; | |
63 | extern Newkeys *newkeys[]; | |
64 | extern z_stream incoming_stream; | |
65 | extern z_stream outgoing_stream; | |
b5a28cbc | 66 | extern struct monitor *pmonitor; |
1853d1ef | 67 | extern Buffer input, output; |
7fceb20d | 68 | extern ServerOptions options; |
1853d1ef | 69 | |
2362db19 | 70 | int |
71 | mm_is_monitor(void) | |
72 | { | |
73 | /* | |
74 | * m_pid is only set in the privileged part, and | |
75 | * points to the unprivileged child. | |
76 | */ | |
74677ba3 | 77 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 78 | } |
79 | ||
1853d1ef | 80 | void |
81 | mm_request_send(int socket, enum monitor_reqtype type, Buffer *m) | |
82 | { | |
1853d1ef | 83 | u_int mlen = buffer_len(m); |
405a0d43 | 84 | u_char buf[5]; |
1853d1ef | 85 | |
1588c277 | 86 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 87 | |
88 | PUT_32BIT(buf, mlen + 1); | |
7203d6bb | 89 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
dc54438a | 90 | if (atomicio(vwrite, socket, buf, sizeof(buf)) != sizeof(buf)) |
1588c277 | 91 | fatal("%s: write", __func__); |
dc54438a | 92 | if (atomicio(vwrite, socket, buffer_ptr(m), mlen) != mlen) |
1588c277 | 93 | fatal("%s: write", __func__); |
1853d1ef | 94 | } |
95 | ||
96 | void | |
97 | mm_request_receive(int socket, Buffer *m) | |
98 | { | |
99 | u_char buf[4]; | |
1853d1ef | 100 | u_int msg_len; |
405a0d43 | 101 | ssize_t res; |
1853d1ef | 102 | |
1588c277 | 103 | debug3("%s entering", __func__); |
1853d1ef | 104 | |
105 | res = atomicio(read, socket, buf, sizeof(buf)); | |
106 | if (res != sizeof(buf)) { | |
107 | if (res == 0) | |
2362db19 | 108 | cleanup_exit(255); |
1588c277 | 109 | fatal("%s: read: %ld", __func__, (long)res); |
1853d1ef | 110 | } |
111 | msg_len = GET_32BIT(buf); | |
112 | if (msg_len > 256 * 1024) | |
1588c277 | 113 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 114 | buffer_clear(m); |
115 | buffer_append_space(m, msg_len); | |
116 | res = atomicio(read, socket, buffer_ptr(m), msg_len); | |
117 | if (res != msg_len) | |
1588c277 | 118 | fatal("%s: read: %ld != msg_len", __func__, (long)res); |
1853d1ef | 119 | } |
120 | ||
121 | void | |
122 | mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m) | |
123 | { | |
124 | u_char rtype; | |
125 | ||
1588c277 | 126 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 127 | |
128 | mm_request_receive(socket, m); | |
129 | rtype = buffer_get_char(m); | |
130 | if (rtype != type) | |
1588c277 | 131 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 132 | rtype, type); |
133 | } | |
134 | ||
135 | DH * | |
136 | mm_choose_dh(int min, int nbits, int max) | |
137 | { | |
138 | BIGNUM *p, *g; | |
139 | int success = 0; | |
140 | Buffer m; | |
141 | ||
142 | buffer_init(&m); | |
143 | buffer_put_int(&m, min); | |
144 | buffer_put_int(&m, nbits); | |
145 | buffer_put_int(&m, max); | |
146 | ||
b5a28cbc | 147 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 148 | |
1588c277 | 149 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 150 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 151 | |
152 | success = buffer_get_char(&m); | |
153 | if (success == 0) | |
1588c277 | 154 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 155 | |
156 | if ((p = BN_new()) == NULL) | |
1588c277 | 157 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 158 | if ((g = BN_new()) == NULL) |
1588c277 | 159 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 160 | buffer_get_bignum2(&m, p); |
161 | buffer_get_bignum2(&m, g); | |
162 | ||
1588c277 | 163 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 164 | buffer_free(&m); |
165 | ||
166 | return (dh_new_group(g, p)); | |
167 | } | |
168 | ||
169 | int | |
170 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
171 | { | |
b5a28cbc | 172 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 173 | Buffer m; |
174 | ||
1588c277 | 175 | debug3("%s entering", __func__); |
1853d1ef | 176 | |
177 | buffer_init(&m); | |
178 | buffer_put_int(&m, kex->host_key_index(key)); | |
179 | buffer_put_string(&m, data, datalen); | |
180 | ||
b5a28cbc | 181 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 182 | |
1588c277 | 183 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 184 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 185 | *sigp = buffer_get_string(&m, lenp); |
186 | buffer_free(&m); | |
187 | ||
188 | return (0); | |
189 | } | |
190 | ||
191 | struct passwd * | |
192 | mm_getpwnamallow(const char *login) | |
193 | { | |
194 | Buffer m; | |
195 | struct passwd *pw; | |
196 | u_int pwlen; | |
197 | ||
1588c277 | 198 | debug3("%s entering", __func__); |
1853d1ef | 199 | |
200 | buffer_init(&m); | |
201 | buffer_put_cstring(&m, login); | |
202 | ||
b5a28cbc | 203 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 204 | |
1588c277 | 205 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 206 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 207 | |
208 | if (buffer_get_char(&m) == 0) { | |
209 | buffer_free(&m); | |
210 | return (NULL); | |
211 | } | |
212 | pw = buffer_get_string(&m, &pwlen); | |
213 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 214 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 215 | pw->pw_name = buffer_get_string(&m, NULL); |
216 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
217 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 218 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 219 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 220 | #endif |
1853d1ef | 221 | pw->pw_dir = buffer_get_string(&m, NULL); |
222 | pw->pw_shell = buffer_get_string(&m, NULL); | |
223 | buffer_free(&m); | |
224 | ||
225 | return (pw); | |
226 | } | |
227 | ||
02cd6c56 | 228 | char * |
229 | mm_auth2_read_banner(void) | |
94a73cdc | 230 | { |
231 | Buffer m; | |
232 | char *banner; | |
233 | ||
1588c277 | 234 | debug3("%s entering", __func__); |
94a73cdc | 235 | |
236 | buffer_init(&m); | |
b5a28cbc | 237 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 238 | buffer_clear(&m); |
239 | ||
02cd6c56 | 240 | mm_request_receive_expect(pmonitor->m_recvfd, |
241 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 242 | banner = buffer_get_string(&m, NULL); |
243 | buffer_free(&m); | |
7203d6bb | 244 | |
02cd6c56 | 245 | /* treat empty banner as missing banner */ |
246 | if (strlen(banner) == 0) { | |
247 | xfree(banner); | |
248 | banner = NULL; | |
249 | } | |
94a73cdc | 250 | return (banner); |
251 | } | |
252 | ||
1853d1ef | 253 | /* Inform the privileged process about service and style */ |
254 | ||
255 | void | |
256 | mm_inform_authserv(char *service, char *style) | |
257 | { | |
258 | Buffer m; | |
259 | ||
1588c277 | 260 | debug3("%s entering", __func__); |
1853d1ef | 261 | |
262 | buffer_init(&m); | |
263 | buffer_put_cstring(&m, service); | |
264 | buffer_put_cstring(&m, style ? style : ""); | |
265 | ||
b5a28cbc | 266 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 267 | |
268 | buffer_free(&m); | |
269 | } | |
270 | ||
271 | /* Do the password authentication */ | |
272 | int | |
273 | mm_auth_password(Authctxt *authctxt, char *password) | |
274 | { | |
275 | Buffer m; | |
276 | int authenticated = 0; | |
277 | ||
1588c277 | 278 | debug3("%s entering", __func__); |
1853d1ef | 279 | |
280 | buffer_init(&m); | |
281 | buffer_put_cstring(&m, password); | |
b5a28cbc | 282 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 283 | |
1588c277 | 284 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 285 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 286 | |
287 | authenticated = buffer_get_int(&m); | |
288 | ||
289 | buffer_free(&m); | |
290 | ||
291 | debug3("%s: user %sauthenticated", | |
1588c277 | 292 | __func__, authenticated ? "" : "not "); |
1853d1ef | 293 | return (authenticated); |
294 | } | |
295 | ||
296 | int | |
297 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
298 | { | |
299 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
300 | } | |
301 | ||
302 | int | |
303 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
304 | Key *key) | |
305 | { | |
306 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
307 | } | |
308 | ||
309 | int | |
310 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
311 | char *host, Key *key) | |
312 | { | |
313 | int ret; | |
314 | ||
315 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
316 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
317 | key->type = KEY_RSA1; | |
318 | return (ret); | |
319 | } | |
320 | ||
321 | static void | |
322 | mm_send_debug(Buffer *m) | |
323 | { | |
324 | char *msg; | |
325 | ||
326 | while (buffer_len(m)) { | |
327 | msg = buffer_get_string(m, NULL); | |
1588c277 | 328 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 329 | packet_send_debug("%s", msg); |
330 | xfree(msg); | |
331 | } | |
332 | } | |
333 | ||
334 | int | |
335 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
336 | { | |
337 | Buffer m; | |
338 | u_char *blob; | |
339 | u_int len; | |
92e15201 | 340 | int allowed = 0, have_forced = 0; |
1853d1ef | 341 | |
1588c277 | 342 | debug3("%s entering", __func__); |
1853d1ef | 343 | |
344 | /* Convert the key to a blob and the pass it over */ | |
345 | if (!key_to_blob(key, &blob, &len)) | |
346 | return (0); | |
347 | ||
348 | buffer_init(&m); | |
349 | buffer_put_int(&m, type); | |
350 | buffer_put_cstring(&m, user ? user : ""); | |
351 | buffer_put_cstring(&m, host ? host : ""); | |
352 | buffer_put_string(&m, blob, len); | |
353 | xfree(blob); | |
354 | ||
b5a28cbc | 355 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 356 | |
1588c277 | 357 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 358 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 359 | |
360 | allowed = buffer_get_int(&m); | |
361 | ||
92e15201 | 362 | /* fake forced command */ |
363 | auth_clear_options(); | |
364 | have_forced = buffer_get_int(&m); | |
365 | forced_command = have_forced ? xstrdup("true") : NULL; | |
366 | ||
1853d1ef | 367 | /* Send potential debug messages */ |
368 | mm_send_debug(&m); | |
369 | ||
370 | buffer_free(&m); | |
371 | ||
372 | return (allowed); | |
373 | } | |
374 | ||
375 | /* | |
376 | * This key verify needs to send the key type along, because the | |
377 | * privileged parent makes the decision if the key is allowed | |
378 | * for authentication. | |
379 | */ | |
380 | ||
381 | int | |
382 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
383 | { | |
384 | Buffer m; | |
385 | u_char *blob; | |
386 | u_int len; | |
387 | int verified = 0; | |
388 | ||
1588c277 | 389 | debug3("%s entering", __func__); |
1853d1ef | 390 | |
391 | /* Convert the key to a blob and the pass it over */ | |
392 | if (!key_to_blob(key, &blob, &len)) | |
393 | return (0); | |
394 | ||
395 | buffer_init(&m); | |
396 | buffer_put_string(&m, blob, len); | |
397 | buffer_put_string(&m, sig, siglen); | |
398 | buffer_put_string(&m, data, datalen); | |
399 | xfree(blob); | |
400 | ||
b5a28cbc | 401 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 402 | |
1588c277 | 403 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 404 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 405 | |
406 | verified = buffer_get_int(&m); | |
407 | ||
408 | buffer_free(&m); | |
409 | ||
410 | return (verified); | |
411 | } | |
412 | ||
413 | /* Export key state after authentication */ | |
414 | Newkeys * | |
415 | mm_newkeys_from_blob(u_char *blob, int blen) | |
416 | { | |
417 | Buffer b; | |
418 | u_int len; | |
419 | Newkeys *newkey = NULL; | |
420 | Enc *enc; | |
421 | Mac *mac; | |
422 | Comp *comp; | |
423 | ||
1588c277 | 424 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 425 | #ifdef DEBUG_PK |
426 | dump_base64(stderr, blob, blen); | |
427 | #endif | |
428 | buffer_init(&b); | |
429 | buffer_append(&b, blob, blen); | |
430 | ||
431 | newkey = xmalloc(sizeof(*newkey)); | |
432 | enc = &newkey->enc; | |
433 | mac = &newkey->mac; | |
434 | comp = &newkey->comp; | |
435 | ||
436 | /* Enc structure */ | |
437 | enc->name = buffer_get_string(&b, NULL); | |
438 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
439 | enc->enabled = buffer_get_int(&b); | |
440 | enc->block_size = buffer_get_int(&b); | |
441 | enc->key = buffer_get_string(&b, &enc->key_len); | |
442 | enc->iv = buffer_get_string(&b, &len); | |
443 | if (len != enc->block_size) | |
bb0640b2 | 444 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 445 | enc->block_size, len); |
446 | ||
447 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 448 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 449 | enc->name, enc->cipher); |
450 | ||
451 | /* Mac structure */ | |
452 | mac->name = buffer_get_string(&b, NULL); | |
453 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 454 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 455 | mac->enabled = buffer_get_int(&b); |
456 | mac->key = buffer_get_string(&b, &len); | |
457 | if (len > mac->key_len) | |
bb0640b2 | 458 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 459 | mac->key_len); |
460 | mac->key_len = len; | |
461 | ||
462 | /* Comp structure */ | |
463 | comp->type = buffer_get_int(&b); | |
464 | comp->enabled = buffer_get_int(&b); | |
465 | comp->name = buffer_get_string(&b, NULL); | |
466 | ||
467 | len = buffer_len(&b); | |
468 | if (len != 0) | |
bb0640b2 | 469 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 470 | buffer_free(&b); |
471 | return (newkey); | |
472 | } | |
473 | ||
474 | int | |
475 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
476 | { | |
477 | Buffer b; | |
478 | int len; | |
1853d1ef | 479 | Enc *enc; |
480 | Mac *mac; | |
481 | Comp *comp; | |
482 | Newkeys *newkey = newkeys[mode]; | |
483 | ||
1588c277 | 484 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 485 | |
486 | if (newkey == NULL) { | |
1588c277 | 487 | error("%s: newkey == NULL", __func__); |
1853d1ef | 488 | return 0; |
489 | } | |
490 | enc = &newkey->enc; | |
491 | mac = &newkey->mac; | |
492 | comp = &newkey->comp; | |
493 | ||
494 | buffer_init(&b); | |
495 | /* Enc structure */ | |
496 | buffer_put_cstring(&b, enc->name); | |
497 | /* The cipher struct is constant and shared, you export pointer */ | |
498 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
499 | buffer_put_int(&b, enc->enabled); | |
500 | buffer_put_int(&b, enc->block_size); | |
501 | buffer_put_string(&b, enc->key, enc->key_len); | |
502 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
503 | buffer_put_string(&b, enc->iv, enc->block_size); | |
504 | ||
505 | /* Mac structure */ | |
506 | buffer_put_cstring(&b, mac->name); | |
507 | buffer_put_int(&b, mac->enabled); | |
508 | buffer_put_string(&b, mac->key, mac->key_len); | |
509 | ||
510 | /* Comp structure */ | |
511 | buffer_put_int(&b, comp->type); | |
512 | buffer_put_int(&b, comp->enabled); | |
513 | buffer_put_cstring(&b, comp->name); | |
514 | ||
515 | len = buffer_len(&b); | |
1853d1ef | 516 | if (lenp != NULL) |
517 | *lenp = len; | |
eb9f2fab | 518 | if (blobp != NULL) { |
519 | *blobp = xmalloc(len); | |
520 | memcpy(*blobp, buffer_ptr(&b), len); | |
521 | } | |
522 | memset(buffer_ptr(&b), 0, len); | |
523 | buffer_free(&b); | |
1853d1ef | 524 | return len; |
525 | } | |
526 | ||
527 | static void | |
528 | mm_send_kex(Buffer *m, Kex *kex) | |
529 | { | |
530 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
531 | buffer_put_int(m, kex->we_need); | |
532 | buffer_put_int(m, kex->hostkey_type); | |
533 | buffer_put_int(m, kex->kex_type); | |
534 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
535 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
536 | buffer_put_int(m, kex->flags); | |
537 | buffer_put_cstring(m, kex->client_version_string); | |
538 | buffer_put_cstring(m, kex->server_version_string); | |
539 | } | |
540 | ||
541 | void | |
b5a28cbc | 542 | mm_send_keystate(struct monitor *pmonitor) |
1853d1ef | 543 | { |
544 | Buffer m; | |
545 | u_char *blob, *p; | |
546 | u_int bloblen, plen; | |
ffd7b36b | 547 | u_int32_t seqnr, packets; |
548 | u_int64_t blocks; | |
1853d1ef | 549 | |
550 | buffer_init(&m); | |
551 | ||
552 | if (!compat20) { | |
553 | u_char iv[24]; | |
9459414c | 554 | u_char *key; |
555 | u_int ivlen, keylen; | |
1853d1ef | 556 | |
557 | buffer_put_int(&m, packet_get_protocol_flags()); | |
558 | ||
559 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
560 | ||
9459414c | 561 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
562 | keylen = packet_get_encryption_key(NULL); | |
563 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
564 | keylen = packet_get_encryption_key(key); | |
565 | buffer_put_string(&m, key, keylen); | |
566 | memset(key, 0, keylen); | |
567 | xfree(key); | |
568 | ||
1853d1ef | 569 | ivlen = packet_get_keyiv_len(MODE_OUT); |
570 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
571 | buffer_put_string(&m, iv, ivlen); | |
572 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
573 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
574 | buffer_put_string(&m, iv, ivlen); | |
575 | goto skip; | |
576 | } else { | |
577 | /* Kex for rekeying */ | |
b5a28cbc | 578 | mm_send_kex(&m, *pmonitor->m_pkex); |
1853d1ef | 579 | } |
580 | ||
581 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 582 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 583 | |
584 | /* Keys from Kex */ | |
585 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 586 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 587 | |
588 | buffer_put_string(&m, blob, bloblen); | |
589 | xfree(blob); | |
590 | ||
591 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 592 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 593 | |
594 | buffer_put_string(&m, blob, bloblen); | |
595 | xfree(blob); | |
596 | ||
ffd7b36b | 597 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
598 | buffer_put_int(&m, seqnr); | |
599 | buffer_put_int64(&m, blocks); | |
600 | buffer_put_int(&m, packets); | |
806e4c11 | 601 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 602 | buffer_put_int(&m, seqnr); |
603 | buffer_put_int64(&m, blocks); | |
604 | buffer_put_int(&m, packets); | |
1853d1ef | 605 | |
1588c277 | 606 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 607 | skip: |
608 | /* More key context */ | |
609 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
610 | p = xmalloc(plen+1); | |
611 | packet_get_keycontext(MODE_OUT, p); | |
612 | buffer_put_string(&m, p, plen); | |
613 | xfree(p); | |
614 | ||
615 | plen = packet_get_keycontext(MODE_IN, NULL); | |
616 | p = xmalloc(plen+1); | |
617 | packet_get_keycontext(MODE_IN, p); | |
618 | buffer_put_string(&m, p, plen); | |
619 | xfree(p); | |
620 | ||
621 | /* Compression state */ | |
1588c277 | 622 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 623 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
624 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
625 | ||
626 | /* Network I/O buffers */ | |
627 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
628 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
629 | ||
b5a28cbc | 630 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 631 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 632 | |
633 | buffer_free(&m); | |
634 | } | |
635 | ||
636 | int | |
637 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) | |
638 | { | |
639 | Buffer m; | |
661e45a0 | 640 | char *p; |
1853d1ef | 641 | int success = 0; |
642 | ||
643 | buffer_init(&m); | |
b5a28cbc | 644 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 645 | |
1588c277 | 646 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 647 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 648 | |
649 | success = buffer_get_int(&m); | |
650 | if (success == 0) { | |
1588c277 | 651 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 652 | buffer_free(&m); |
653 | return (0); | |
654 | } | |
655 | p = buffer_get_string(&m, NULL); | |
656 | buffer_free(&m); | |
657 | ||
658 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
659 | xfree(p); | |
660 | ||
b5a28cbc | 661 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
662 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 663 | |
664 | /* Success */ | |
665 | return (1); | |
666 | } | |
667 | ||
668 | void | |
2362db19 | 669 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 670 | { |
1853d1ef | 671 | Buffer m; |
672 | ||
673 | if (s->ttyfd == -1) | |
674 | return; | |
675 | buffer_init(&m); | |
676 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 677 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 678 | buffer_free(&m); |
679 | ||
680 | /* closed dup'ed master */ | |
681 | if (close(s->ptymaster) < 0) | |
682 | error("close(s->ptymaster): %s", strerror(errno)); | |
683 | ||
684 | /* unlink pty from session */ | |
685 | s->ttyfd = -1; | |
686 | } | |
687 | ||
ad200abb | 688 | #ifdef USE_PAM |
689 | void | |
529d73ab | 690 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 691 | { |
692 | Buffer m; | |
693 | ||
1588c277 | 694 | debug3("%s entering", __func__); |
7fceb20d | 695 | if (!options.use_pam) |
696 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 697 | |
698 | buffer_init(&m); | |
b5a28cbc | 699 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 700 | |
701 | buffer_free(&m); | |
702 | } | |
05114c74 | 703 | |
5b9e2464 | 704 | u_int |
705 | mm_do_pam_account(void) | |
706 | { | |
707 | Buffer m; | |
708 | u_int ret; | |
709 | ||
710 | debug3("%s entering", __func__); | |
711 | if (!options.use_pam) | |
712 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
713 | ||
714 | buffer_init(&m); | |
715 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
716 | ||
aff51935 | 717 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 718 | MONITOR_ANS_PAM_ACCOUNT, &m); |
719 | ret = buffer_get_int(&m); | |
720 | ||
721 | buffer_free(&m); | |
b6453d99 | 722 | |
5b9e2464 | 723 | debug3("%s returning %d", __func__, ret); |
724 | ||
725 | return (ret); | |
726 | } | |
727 | ||
05114c74 | 728 | void * |
729 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
730 | { | |
731 | Buffer m; | |
732 | int success; | |
733 | ||
734 | debug3("%s", __func__); | |
735 | buffer_init(&m); | |
736 | buffer_put_cstring(&m, authctxt->user); | |
737 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
738 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
739 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
740 | success = buffer_get_int(&m); | |
741 | if (success == 0) { | |
742 | debug3("%s: pam_init_ctx failed", __func__); | |
743 | buffer_free(&m); | |
744 | return (NULL); | |
745 | } | |
746 | buffer_free(&m); | |
747 | return (authctxt); | |
748 | } | |
749 | ||
750 | int | |
751 | mm_sshpam_query(void *ctx, char **name, char **info, | |
752 | u_int *num, char ***prompts, u_int **echo_on) | |
753 | { | |
754 | Buffer m; | |
755 | int i, ret; | |
756 | ||
757 | debug3("%s", __func__); | |
758 | buffer_init(&m); | |
759 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
760 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
761 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
762 | ret = buffer_get_int(&m); | |
763 | debug3("%s: pam_query returned %d", __func__, ret); | |
764 | *name = buffer_get_string(&m, NULL); | |
765 | *info = buffer_get_string(&m, NULL); | |
766 | *num = buffer_get_int(&m); | |
767 | *prompts = xmalloc((*num + 1) * sizeof(char *)); | |
768 | *echo_on = xmalloc((*num + 1) * sizeof(u_int)); | |
769 | for (i = 0; i < *num; ++i) { | |
770 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
771 | (*echo_on)[i] = buffer_get_int(&m); | |
772 | } | |
773 | buffer_free(&m); | |
774 | return (ret); | |
775 | } | |
776 | ||
777 | int | |
778 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
779 | { | |
780 | Buffer m; | |
781 | int i, ret; | |
782 | ||
783 | debug3("%s", __func__); | |
784 | buffer_init(&m); | |
785 | buffer_put_int(&m, num); | |
786 | for (i = 0; i < num; ++i) | |
787 | buffer_put_cstring(&m, resp[i]); | |
788 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
789 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
790 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
791 | ret = buffer_get_int(&m); | |
792 | debug3("%s: pam_respond returned %d", __func__, ret); | |
793 | buffer_free(&m); | |
794 | return (ret); | |
795 | } | |
796 | ||
797 | void | |
798 | mm_sshpam_free_ctx(void *ctxtp) | |
799 | { | |
800 | Buffer m; | |
801 | ||
802 | debug3("%s", __func__); | |
803 | buffer_init(&m); | |
804 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
805 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
806 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
807 | buffer_free(&m); | |
808 | } | |
ad200abb | 809 | #endif /* USE_PAM */ |
810 | ||
1853d1ef | 811 | /* Request process termination */ |
812 | ||
813 | void | |
814 | mm_terminate(void) | |
815 | { | |
816 | Buffer m; | |
817 | ||
818 | buffer_init(&m); | |
b5a28cbc | 819 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 820 | buffer_free(&m); |
821 | } | |
822 | ||
823 | int | |
824 | mm_ssh1_session_key(BIGNUM *num) | |
825 | { | |
826 | int rsafail; | |
827 | Buffer m; | |
828 | ||
829 | buffer_init(&m); | |
830 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 831 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 832 | |
b5a28cbc | 833 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 834 | |
835 | rsafail = buffer_get_int(&m); | |
836 | buffer_get_bignum2(&m, num); | |
837 | ||
838 | buffer_free(&m); | |
839 | ||
840 | return (rsafail); | |
841 | } | |
842 | ||
843 | static void | |
844 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
845 | char ***prompts, u_int **echo_on) | |
846 | { | |
7203d6bb | 847 | *name = xstrdup(""); |
848 | *infotxt = xstrdup(""); | |
1853d1ef | 849 | *numprompts = 1; |
343288b8 | 850 | *prompts = xmalloc(*numprompts * sizeof(char *)); |
1853d1ef | 851 | *echo_on = xmalloc(*numprompts * sizeof(u_int)); |
852 | (*echo_on)[0] = 0; | |
853 | } | |
854 | ||
855 | int | |
856 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
857 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
858 | { | |
859 | Buffer m; | |
6d6c25e3 | 860 | u_int success; |
1853d1ef | 861 | char *challenge; |
862 | ||
1588c277 | 863 | debug3("%s: entering", __func__); |
1853d1ef | 864 | |
865 | buffer_init(&m); | |
b5a28cbc | 866 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 867 | |
b5a28cbc | 868 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 869 | &m); |
6d6c25e3 | 870 | success = buffer_get_int(&m); |
871 | if (success == 0) { | |
1588c277 | 872 | debug3("%s: no challenge", __func__); |
1853d1ef | 873 | buffer_free(&m); |
874 | return (-1); | |
875 | } | |
876 | ||
877 | /* Get the challenge, and format the response */ | |
878 | challenge = buffer_get_string(&m, NULL); | |
879 | buffer_free(&m); | |
880 | ||
881 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
882 | (*prompts)[0] = challenge; | |
883 | ||
1588c277 | 884 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 885 | |
886 | return (0); | |
887 | } | |
888 | ||
889 | int | |
890 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
891 | { | |
892 | Buffer m; | |
893 | int authok; | |
894 | ||
1588c277 | 895 | debug3("%s: entering", __func__); |
1853d1ef | 896 | if (numresponses != 1) |
897 | return (-1); | |
898 | ||
899 | buffer_init(&m); | |
900 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 901 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 902 | |
b5a28cbc | 903 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 904 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
905 | ||
906 | authok = buffer_get_int(&m); | |
907 | buffer_free(&m); | |
908 | ||
909 | return ((authok == 0) ? -1 : 0); | |
910 | } | |
911 | ||
912 | int | |
913 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
914 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
915 | { | |
916 | Buffer m; | |
6d6c25e3 | 917 | int len; |
918 | u_int success; | |
1853d1ef | 919 | char *p, *challenge; |
920 | ||
1588c277 | 921 | debug3("%s: entering", __func__); |
1853d1ef | 922 | |
923 | buffer_init(&m); | |
b5a28cbc | 924 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 925 | |
b5a28cbc | 926 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 927 | &m); |
6d6c25e3 | 928 | success = buffer_get_int(&m); |
929 | if (success == 0) { | |
1588c277 | 930 | debug3("%s: no challenge", __func__); |
1853d1ef | 931 | buffer_free(&m); |
932 | return (-1); | |
933 | } | |
934 | ||
935 | /* Get the challenge, and format the response */ | |
936 | challenge = buffer_get_string(&m, NULL); | |
937 | buffer_free(&m); | |
938 | ||
1588c277 | 939 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 940 | |
941 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
942 | ||
943 | len = strlen(challenge) + strlen(SKEY_PROMPT) + 1; | |
944 | p = xmalloc(len); | |
945 | strlcpy(p, challenge, len); | |
946 | strlcat(p, SKEY_PROMPT, len); | |
947 | (*prompts)[0] = p; | |
948 | xfree(challenge); | |
949 | ||
950 | return (0); | |
951 | } | |
952 | ||
953 | int | |
954 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
955 | { | |
956 | Buffer m; | |
957 | int authok; | |
958 | ||
1588c277 | 959 | debug3("%s: entering", __func__); |
1853d1ef | 960 | if (numresponses != 1) |
961 | return (-1); | |
962 | ||
963 | buffer_init(&m); | |
964 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 965 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 966 | |
b5a28cbc | 967 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 968 | MONITOR_ANS_SKEYRESPOND, &m); |
969 | ||
970 | authok = buffer_get_int(&m); | |
971 | buffer_free(&m); | |
972 | ||
973 | return ((authok == 0) ? -1 : 0); | |
974 | } | |
975 | ||
976 | void | |
977 | mm_ssh1_session_id(u_char session_id[16]) | |
978 | { | |
979 | Buffer m; | |
980 | int i; | |
981 | ||
1588c277 | 982 | debug3("%s entering", __func__); |
1853d1ef | 983 | |
984 | buffer_init(&m); | |
985 | for (i = 0; i < 16; i++) | |
986 | buffer_put_char(&m, session_id[i]); | |
987 | ||
b5a28cbc | 988 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 989 | buffer_free(&m); |
990 | } | |
991 | ||
992 | int | |
993 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
994 | { | |
995 | Buffer m; | |
996 | Key *key; | |
997 | u_char *blob; | |
998 | u_int blen; | |
92e15201 | 999 | int allowed = 0, have_forced = 0; |
1853d1ef | 1000 | |
1588c277 | 1001 | debug3("%s entering", __func__); |
1853d1ef | 1002 | |
1003 | buffer_init(&m); | |
1004 | buffer_put_bignum2(&m, client_n); | |
1005 | ||
b5a28cbc | 1006 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1007 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1008 | |
1009 | allowed = buffer_get_int(&m); | |
1010 | ||
92e15201 | 1011 | /* fake forced command */ |
1012 | auth_clear_options(); | |
1013 | have_forced = buffer_get_int(&m); | |
1014 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1015 | ||
1853d1ef | 1016 | if (allowed && rkey != NULL) { |
1017 | blob = buffer_get_string(&m, &blen); | |
1018 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1019 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1020 | *rkey = key; |
1021 | xfree(blob); | |
1022 | } | |
1023 | mm_send_debug(&m); | |
1024 | buffer_free(&m); | |
1025 | ||
1026 | return (allowed); | |
1027 | } | |
1028 | ||
1029 | BIGNUM * | |
1030 | mm_auth_rsa_generate_challenge(Key *key) | |
1031 | { | |
1032 | Buffer m; | |
1033 | BIGNUM *challenge; | |
1034 | u_char *blob; | |
1035 | u_int blen; | |
1036 | ||
1588c277 | 1037 | debug3("%s entering", __func__); |
1853d1ef | 1038 | |
1039 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1040 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1041 | |
1042 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1043 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1044 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1045 | key->type = KEY_RSA1; |
1046 | ||
1047 | buffer_init(&m); | |
1048 | buffer_put_string(&m, blob, blen); | |
1049 | xfree(blob); | |
1050 | ||
b5a28cbc | 1051 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1052 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1053 | |
1054 | buffer_get_bignum2(&m, challenge); | |
1055 | buffer_free(&m); | |
1056 | ||
1057 | return (challenge); | |
1058 | } | |
1059 | ||
1060 | int | |
1061 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1062 | { | |
1063 | Buffer m; | |
1064 | u_char *blob; | |
1065 | u_int blen; | |
1066 | int success = 0; | |
1067 | ||
1588c277 | 1068 | debug3("%s entering", __func__); |
1853d1ef | 1069 | |
1070 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1071 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1072 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1073 | key->type = KEY_RSA1; |
1074 | ||
1075 | buffer_init(&m); | |
1076 | buffer_put_string(&m, blob, blen); | |
1077 | buffer_put_string(&m, response, 16); | |
1078 | xfree(blob); | |
1079 | ||
b5a28cbc | 1080 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1081 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1082 | |
1083 | success = buffer_get_int(&m); | |
1084 | buffer_free(&m); | |
1085 | ||
1086 | return (success); | |
1087 | } | |
696f6bef | 1088 | |
7364bd04 | 1089 | #ifdef GSSAPI |
1090 | OM_uint32 | |
1091 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid) | |
1092 | { | |
1093 | Buffer m; | |
1094 | OM_uint32 major; | |
1095 | ||
1096 | /* Client doesn't get to see the context */ | |
1097 | *ctx = NULL; | |
1098 | ||
1099 | buffer_init(&m); | |
1100 | buffer_put_string(&m, oid->elements, oid->length); | |
1101 | ||
1102 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1103 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1104 | ||
1105 | major = buffer_get_int(&m); | |
1106 | ||
1107 | buffer_free(&m); | |
1108 | return (major); | |
1109 | } | |
1110 | ||
1111 | OM_uint32 | |
1112 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1113 | gss_buffer_desc *out, OM_uint32 *flags) | |
1114 | { | |
1115 | Buffer m; | |
1116 | OM_uint32 major; | |
f99e1ca4 | 1117 | u_int len; |
7364bd04 | 1118 | |
1119 | buffer_init(&m); | |
1120 | buffer_put_string(&m, in->value, in->length); | |
1121 | ||
1122 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1123 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1124 | ||
1125 | major = buffer_get_int(&m); | |
f99e1ca4 | 1126 | out->value = buffer_get_string(&m, &len); |
1127 | out->length = len; | |
7364bd04 | 1128 | if (flags) |
1129 | *flags = buffer_get_int(&m); | |
1130 | ||
1131 | buffer_free(&m); | |
1132 | ||
1133 | return (major); | |
1134 | } | |
1135 | ||
0789992b | 1136 | OM_uint32 |
1137 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1138 | { | |
1139 | Buffer m; | |
1140 | OM_uint32 major; | |
1141 | ||
1142 | buffer_init(&m); | |
1143 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1144 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1145 | ||
1146 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1147 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1148 | &m); | |
1149 | ||
1150 | major = buffer_get_int(&m); | |
1151 | buffer_free(&m); | |
1152 | return(major); | |
1153 | } | |
1154 | ||
7364bd04 | 1155 | int |
1156 | mm_ssh_gssapi_userok(char *user) | |
1157 | { | |
1158 | Buffer m; | |
1159 | int authenticated = 0; | |
1160 | ||
1161 | buffer_init(&m); | |
1162 | ||
1163 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1164 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1165 | &m); | |
1166 | ||
1167 | authenticated = buffer_get_int(&m); | |
1168 | ||
1169 | buffer_free(&m); | |
1170 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1171 | return (authenticated); | |
1172 | } | |
1173 | #endif /* GSSAPI */ |