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