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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" | |
7364bd04 | 28 | RCSID("$OpenBSD: monitor_wrap.c,v 1.29 2003/08/22 10:56:09 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 | |
69 | void | |
70 | mm_request_send(int socket, enum monitor_reqtype type, Buffer *m) | |
71 | { | |
1853d1ef | 72 | u_int mlen = buffer_len(m); |
405a0d43 | 73 | u_char buf[5]; |
1853d1ef | 74 | |
1588c277 | 75 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 76 | |
77 | PUT_32BIT(buf, mlen + 1); | |
7203d6bb | 78 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
dc54438a | 79 | if (atomicio(vwrite, socket, buf, sizeof(buf)) != sizeof(buf)) |
1588c277 | 80 | fatal("%s: write", __func__); |
dc54438a | 81 | if (atomicio(vwrite, socket, buffer_ptr(m), mlen) != mlen) |
1588c277 | 82 | fatal("%s: write", __func__); |
1853d1ef | 83 | } |
84 | ||
85 | void | |
86 | mm_request_receive(int socket, Buffer *m) | |
87 | { | |
88 | u_char buf[4]; | |
1853d1ef | 89 | u_int msg_len; |
405a0d43 | 90 | ssize_t res; |
1853d1ef | 91 | |
1588c277 | 92 | debug3("%s entering", __func__); |
1853d1ef | 93 | |
94 | res = atomicio(read, socket, buf, sizeof(buf)); | |
95 | if (res != sizeof(buf)) { | |
96 | if (res == 0) | |
97 | fatal_cleanup(); | |
1588c277 | 98 | fatal("%s: read: %ld", __func__, (long)res); |
1853d1ef | 99 | } |
100 | msg_len = GET_32BIT(buf); | |
101 | if (msg_len > 256 * 1024) | |
1588c277 | 102 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 103 | buffer_clear(m); |
104 | buffer_append_space(m, msg_len); | |
105 | res = atomicio(read, socket, buffer_ptr(m), msg_len); | |
106 | if (res != msg_len) | |
1588c277 | 107 | fatal("%s: read: %ld != msg_len", __func__, (long)res); |
1853d1ef | 108 | } |
109 | ||
110 | void | |
111 | mm_request_receive_expect(int socket, enum monitor_reqtype type, Buffer *m) | |
112 | { | |
113 | u_char rtype; | |
114 | ||
1588c277 | 115 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 116 | |
117 | mm_request_receive(socket, m); | |
118 | rtype = buffer_get_char(m); | |
119 | if (rtype != type) | |
1588c277 | 120 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 121 | rtype, type); |
122 | } | |
123 | ||
124 | DH * | |
125 | mm_choose_dh(int min, int nbits, int max) | |
126 | { | |
127 | BIGNUM *p, *g; | |
128 | int success = 0; | |
129 | Buffer m; | |
130 | ||
131 | buffer_init(&m); | |
132 | buffer_put_int(&m, min); | |
133 | buffer_put_int(&m, nbits); | |
134 | buffer_put_int(&m, max); | |
135 | ||
b5a28cbc | 136 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 137 | |
1588c277 | 138 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 139 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 140 | |
141 | success = buffer_get_char(&m); | |
142 | if (success == 0) | |
1588c277 | 143 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 144 | |
145 | if ((p = BN_new()) == NULL) | |
1588c277 | 146 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 147 | if ((g = BN_new()) == NULL) |
1588c277 | 148 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 149 | buffer_get_bignum2(&m, p); |
150 | buffer_get_bignum2(&m, g); | |
151 | ||
1588c277 | 152 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 153 | buffer_free(&m); |
154 | ||
155 | return (dh_new_group(g, p)); | |
156 | } | |
157 | ||
158 | int | |
159 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
160 | { | |
b5a28cbc | 161 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 162 | Buffer m; |
163 | ||
1588c277 | 164 | debug3("%s entering", __func__); |
1853d1ef | 165 | |
166 | buffer_init(&m); | |
167 | buffer_put_int(&m, kex->host_key_index(key)); | |
168 | buffer_put_string(&m, data, datalen); | |
169 | ||
b5a28cbc | 170 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 171 | |
1588c277 | 172 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 173 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 174 | *sigp = buffer_get_string(&m, lenp); |
175 | buffer_free(&m); | |
176 | ||
177 | return (0); | |
178 | } | |
179 | ||
180 | struct passwd * | |
181 | mm_getpwnamallow(const char *login) | |
182 | { | |
183 | Buffer m; | |
184 | struct passwd *pw; | |
185 | u_int pwlen; | |
186 | ||
1588c277 | 187 | debug3("%s entering", __func__); |
1853d1ef | 188 | |
189 | buffer_init(&m); | |
190 | buffer_put_cstring(&m, login); | |
191 | ||
b5a28cbc | 192 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 193 | |
1588c277 | 194 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 195 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 196 | |
197 | if (buffer_get_char(&m) == 0) { | |
198 | buffer_free(&m); | |
199 | return (NULL); | |
200 | } | |
201 | pw = buffer_get_string(&m, &pwlen); | |
202 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 203 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 204 | pw->pw_name = buffer_get_string(&m, NULL); |
205 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
206 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 207 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 208 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 209 | #endif |
1853d1ef | 210 | pw->pw_dir = buffer_get_string(&m, NULL); |
211 | pw->pw_shell = buffer_get_string(&m, NULL); | |
212 | buffer_free(&m); | |
213 | ||
214 | return (pw); | |
215 | } | |
216 | ||
343288b8 | 217 | char *mm_auth2_read_banner(void) |
94a73cdc | 218 | { |
219 | Buffer m; | |
220 | char *banner; | |
221 | ||
1588c277 | 222 | debug3("%s entering", __func__); |
94a73cdc | 223 | |
224 | buffer_init(&m); | |
b5a28cbc | 225 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 226 | buffer_clear(&m); |
227 | ||
b5a28cbc | 228 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTH2_READ_BANNER, &m); |
94a73cdc | 229 | banner = buffer_get_string(&m, NULL); |
230 | buffer_free(&m); | |
7203d6bb | 231 | |
94a73cdc | 232 | return (banner); |
233 | } | |
234 | ||
1853d1ef | 235 | /* Inform the privileged process about service and style */ |
236 | ||
237 | void | |
238 | mm_inform_authserv(char *service, char *style) | |
239 | { | |
240 | Buffer m; | |
241 | ||
1588c277 | 242 | debug3("%s entering", __func__); |
1853d1ef | 243 | |
244 | buffer_init(&m); | |
245 | buffer_put_cstring(&m, service); | |
246 | buffer_put_cstring(&m, style ? style : ""); | |
247 | ||
b5a28cbc | 248 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 249 | |
250 | buffer_free(&m); | |
251 | } | |
252 | ||
253 | /* Do the password authentication */ | |
254 | int | |
255 | mm_auth_password(Authctxt *authctxt, char *password) | |
256 | { | |
257 | Buffer m; | |
258 | int authenticated = 0; | |
259 | ||
1588c277 | 260 | debug3("%s entering", __func__); |
1853d1ef | 261 | |
262 | buffer_init(&m); | |
263 | buffer_put_cstring(&m, password); | |
b5a28cbc | 264 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 265 | |
1588c277 | 266 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 267 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 268 | |
269 | authenticated = buffer_get_int(&m); | |
270 | ||
271 | buffer_free(&m); | |
272 | ||
273 | debug3("%s: user %sauthenticated", | |
1588c277 | 274 | __func__, authenticated ? "" : "not "); |
1853d1ef | 275 | return (authenticated); |
276 | } | |
277 | ||
278 | int | |
279 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
280 | { | |
281 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
282 | } | |
283 | ||
284 | int | |
285 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
286 | Key *key) | |
287 | { | |
288 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
289 | } | |
290 | ||
291 | int | |
292 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
293 | char *host, Key *key) | |
294 | { | |
295 | int ret; | |
296 | ||
297 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
298 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
299 | key->type = KEY_RSA1; | |
300 | return (ret); | |
301 | } | |
302 | ||
303 | static void | |
304 | mm_send_debug(Buffer *m) | |
305 | { | |
306 | char *msg; | |
307 | ||
308 | while (buffer_len(m)) { | |
309 | msg = buffer_get_string(m, NULL); | |
1588c277 | 310 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 311 | packet_send_debug("%s", msg); |
312 | xfree(msg); | |
313 | } | |
314 | } | |
315 | ||
316 | int | |
317 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
318 | { | |
319 | Buffer m; | |
320 | u_char *blob; | |
321 | u_int len; | |
92e15201 | 322 | int allowed = 0, have_forced = 0; |
1853d1ef | 323 | |
1588c277 | 324 | debug3("%s entering", __func__); |
1853d1ef | 325 | |
326 | /* Convert the key to a blob and the pass it over */ | |
327 | if (!key_to_blob(key, &blob, &len)) | |
328 | return (0); | |
329 | ||
330 | buffer_init(&m); | |
331 | buffer_put_int(&m, type); | |
332 | buffer_put_cstring(&m, user ? user : ""); | |
333 | buffer_put_cstring(&m, host ? host : ""); | |
334 | buffer_put_string(&m, blob, len); | |
335 | xfree(blob); | |
336 | ||
b5a28cbc | 337 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 338 | |
1588c277 | 339 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 340 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 341 | |
342 | allowed = buffer_get_int(&m); | |
343 | ||
92e15201 | 344 | /* fake forced command */ |
345 | auth_clear_options(); | |
346 | have_forced = buffer_get_int(&m); | |
347 | forced_command = have_forced ? xstrdup("true") : NULL; | |
348 | ||
1853d1ef | 349 | /* Send potential debug messages */ |
350 | mm_send_debug(&m); | |
351 | ||
352 | buffer_free(&m); | |
353 | ||
354 | return (allowed); | |
355 | } | |
356 | ||
357 | /* | |
358 | * This key verify needs to send the key type along, because the | |
359 | * privileged parent makes the decision if the key is allowed | |
360 | * for authentication. | |
361 | */ | |
362 | ||
363 | int | |
364 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
365 | { | |
366 | Buffer m; | |
367 | u_char *blob; | |
368 | u_int len; | |
369 | int verified = 0; | |
370 | ||
1588c277 | 371 | debug3("%s entering", __func__); |
1853d1ef | 372 | |
373 | /* Convert the key to a blob and the pass it over */ | |
374 | if (!key_to_blob(key, &blob, &len)) | |
375 | return (0); | |
376 | ||
377 | buffer_init(&m); | |
378 | buffer_put_string(&m, blob, len); | |
379 | buffer_put_string(&m, sig, siglen); | |
380 | buffer_put_string(&m, data, datalen); | |
381 | xfree(blob); | |
382 | ||
b5a28cbc | 383 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 384 | |
1588c277 | 385 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 386 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 387 | |
388 | verified = buffer_get_int(&m); | |
389 | ||
390 | buffer_free(&m); | |
391 | ||
392 | return (verified); | |
393 | } | |
394 | ||
395 | /* Export key state after authentication */ | |
396 | Newkeys * | |
397 | mm_newkeys_from_blob(u_char *blob, int blen) | |
398 | { | |
399 | Buffer b; | |
400 | u_int len; | |
401 | Newkeys *newkey = NULL; | |
402 | Enc *enc; | |
403 | Mac *mac; | |
404 | Comp *comp; | |
405 | ||
1588c277 | 406 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 407 | #ifdef DEBUG_PK |
408 | dump_base64(stderr, blob, blen); | |
409 | #endif | |
410 | buffer_init(&b); | |
411 | buffer_append(&b, blob, blen); | |
412 | ||
413 | newkey = xmalloc(sizeof(*newkey)); | |
414 | enc = &newkey->enc; | |
415 | mac = &newkey->mac; | |
416 | comp = &newkey->comp; | |
417 | ||
418 | /* Enc structure */ | |
419 | enc->name = buffer_get_string(&b, NULL); | |
420 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
421 | enc->enabled = buffer_get_int(&b); | |
422 | enc->block_size = buffer_get_int(&b); | |
423 | enc->key = buffer_get_string(&b, &enc->key_len); | |
424 | enc->iv = buffer_get_string(&b, &len); | |
425 | if (len != enc->block_size) | |
bb0640b2 | 426 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 427 | enc->block_size, len); |
428 | ||
429 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 430 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 431 | enc->name, enc->cipher); |
432 | ||
433 | /* Mac structure */ | |
434 | mac->name = buffer_get_string(&b, NULL); | |
435 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 436 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 437 | mac->enabled = buffer_get_int(&b); |
438 | mac->key = buffer_get_string(&b, &len); | |
439 | if (len > mac->key_len) | |
bb0640b2 | 440 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 441 | mac->key_len); |
442 | mac->key_len = len; | |
443 | ||
444 | /* Comp structure */ | |
445 | comp->type = buffer_get_int(&b); | |
446 | comp->enabled = buffer_get_int(&b); | |
447 | comp->name = buffer_get_string(&b, NULL); | |
448 | ||
449 | len = buffer_len(&b); | |
450 | if (len != 0) | |
bb0640b2 | 451 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 452 | buffer_free(&b); |
453 | return (newkey); | |
454 | } | |
455 | ||
456 | int | |
457 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
458 | { | |
459 | Buffer b; | |
460 | int len; | |
1853d1ef | 461 | Enc *enc; |
462 | Mac *mac; | |
463 | Comp *comp; | |
464 | Newkeys *newkey = newkeys[mode]; | |
465 | ||
1588c277 | 466 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 467 | |
468 | if (newkey == NULL) { | |
1588c277 | 469 | error("%s: newkey == NULL", __func__); |
1853d1ef | 470 | return 0; |
471 | } | |
472 | enc = &newkey->enc; | |
473 | mac = &newkey->mac; | |
474 | comp = &newkey->comp; | |
475 | ||
476 | buffer_init(&b); | |
477 | /* Enc structure */ | |
478 | buffer_put_cstring(&b, enc->name); | |
479 | /* The cipher struct is constant and shared, you export pointer */ | |
480 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
481 | buffer_put_int(&b, enc->enabled); | |
482 | buffer_put_int(&b, enc->block_size); | |
483 | buffer_put_string(&b, enc->key, enc->key_len); | |
484 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
485 | buffer_put_string(&b, enc->iv, enc->block_size); | |
486 | ||
487 | /* Mac structure */ | |
488 | buffer_put_cstring(&b, mac->name); | |
489 | buffer_put_int(&b, mac->enabled); | |
490 | buffer_put_string(&b, mac->key, mac->key_len); | |
491 | ||
492 | /* Comp structure */ | |
493 | buffer_put_int(&b, comp->type); | |
494 | buffer_put_int(&b, comp->enabled); | |
495 | buffer_put_cstring(&b, comp->name); | |
496 | ||
497 | len = buffer_len(&b); | |
1853d1ef | 498 | if (lenp != NULL) |
499 | *lenp = len; | |
eb9f2fab | 500 | if (blobp != NULL) { |
501 | *blobp = xmalloc(len); | |
502 | memcpy(*blobp, buffer_ptr(&b), len); | |
503 | } | |
504 | memset(buffer_ptr(&b), 0, len); | |
505 | buffer_free(&b); | |
1853d1ef | 506 | return len; |
507 | } | |
508 | ||
509 | static void | |
510 | mm_send_kex(Buffer *m, Kex *kex) | |
511 | { | |
512 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
513 | buffer_put_int(m, kex->we_need); | |
514 | buffer_put_int(m, kex->hostkey_type); | |
515 | buffer_put_int(m, kex->kex_type); | |
516 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
517 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
518 | buffer_put_int(m, kex->flags); | |
519 | buffer_put_cstring(m, kex->client_version_string); | |
520 | buffer_put_cstring(m, kex->server_version_string); | |
521 | } | |
522 | ||
523 | void | |
b5a28cbc | 524 | mm_send_keystate(struct monitor *pmonitor) |
1853d1ef | 525 | { |
526 | Buffer m; | |
527 | u_char *blob, *p; | |
528 | u_int bloblen, plen; | |
ffd7b36b | 529 | u_int32_t seqnr, packets; |
530 | u_int64_t blocks; | |
1853d1ef | 531 | |
532 | buffer_init(&m); | |
533 | ||
534 | if (!compat20) { | |
535 | u_char iv[24]; | |
9459414c | 536 | u_char *key; |
537 | u_int ivlen, keylen; | |
1853d1ef | 538 | |
539 | buffer_put_int(&m, packet_get_protocol_flags()); | |
540 | ||
541 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
542 | ||
9459414c | 543 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
544 | keylen = packet_get_encryption_key(NULL); | |
545 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
546 | keylen = packet_get_encryption_key(key); | |
547 | buffer_put_string(&m, key, keylen); | |
548 | memset(key, 0, keylen); | |
549 | xfree(key); | |
550 | ||
1853d1ef | 551 | ivlen = packet_get_keyiv_len(MODE_OUT); |
552 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
553 | buffer_put_string(&m, iv, ivlen); | |
554 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
555 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
556 | buffer_put_string(&m, iv, ivlen); | |
557 | goto skip; | |
558 | } else { | |
559 | /* Kex for rekeying */ | |
b5a28cbc | 560 | mm_send_kex(&m, *pmonitor->m_pkex); |
1853d1ef | 561 | } |
562 | ||
563 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 564 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 565 | |
566 | /* Keys from Kex */ | |
567 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 568 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 569 | |
570 | buffer_put_string(&m, blob, bloblen); | |
571 | xfree(blob); | |
572 | ||
573 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 574 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 575 | |
576 | buffer_put_string(&m, blob, bloblen); | |
577 | xfree(blob); | |
578 | ||
ffd7b36b | 579 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
580 | buffer_put_int(&m, seqnr); | |
581 | buffer_put_int64(&m, blocks); | |
582 | buffer_put_int(&m, packets); | |
806e4c11 | 583 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 584 | buffer_put_int(&m, seqnr); |
585 | buffer_put_int64(&m, blocks); | |
586 | buffer_put_int(&m, packets); | |
1853d1ef | 587 | |
1588c277 | 588 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 589 | skip: |
590 | /* More key context */ | |
591 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
592 | p = xmalloc(plen+1); | |
593 | packet_get_keycontext(MODE_OUT, p); | |
594 | buffer_put_string(&m, p, plen); | |
595 | xfree(p); | |
596 | ||
597 | plen = packet_get_keycontext(MODE_IN, NULL); | |
598 | p = xmalloc(plen+1); | |
599 | packet_get_keycontext(MODE_IN, p); | |
600 | buffer_put_string(&m, p, plen); | |
601 | xfree(p); | |
602 | ||
603 | /* Compression state */ | |
1588c277 | 604 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 605 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
606 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
607 | ||
608 | /* Network I/O buffers */ | |
609 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
610 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
611 | ||
b5a28cbc | 612 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 613 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 614 | |
615 | buffer_free(&m); | |
616 | } | |
617 | ||
618 | int | |
619 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) | |
620 | { | |
621 | Buffer m; | |
661e45a0 | 622 | char *p; |
1853d1ef | 623 | int success = 0; |
624 | ||
625 | buffer_init(&m); | |
b5a28cbc | 626 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 627 | |
1588c277 | 628 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 629 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 630 | |
631 | success = buffer_get_int(&m); | |
632 | if (success == 0) { | |
1588c277 | 633 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 634 | buffer_free(&m); |
635 | return (0); | |
636 | } | |
637 | p = buffer_get_string(&m, NULL); | |
638 | buffer_free(&m); | |
639 | ||
640 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
641 | xfree(p); | |
642 | ||
b5a28cbc | 643 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
644 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 645 | |
646 | /* Success */ | |
647 | return (1); | |
648 | } | |
649 | ||
650 | void | |
651 | mm_session_pty_cleanup2(void *session) | |
652 | { | |
653 | Session *s = session; | |
654 | Buffer m; | |
655 | ||
656 | if (s->ttyfd == -1) | |
657 | return; | |
658 | buffer_init(&m); | |
659 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 660 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 661 | buffer_free(&m); |
662 | ||
663 | /* closed dup'ed master */ | |
664 | if (close(s->ptymaster) < 0) | |
665 | error("close(s->ptymaster): %s", strerror(errno)); | |
666 | ||
667 | /* unlink pty from session */ | |
668 | s->ttyfd = -1; | |
669 | } | |
670 | ||
ad200abb | 671 | #ifdef USE_PAM |
672 | void | |
673 | mm_start_pam(char *user) | |
674 | { | |
675 | Buffer m; | |
676 | ||
1588c277 | 677 | debug3("%s entering", __func__); |
7fceb20d | 678 | if (!options.use_pam) |
679 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 680 | |
681 | buffer_init(&m); | |
682 | buffer_put_cstring(&m, user); | |
683 | ||
b5a28cbc | 684 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 685 | |
686 | buffer_free(&m); | |
687 | } | |
05114c74 | 688 | |
5b9e2464 | 689 | u_int |
690 | mm_do_pam_account(void) | |
691 | { | |
692 | Buffer m; | |
693 | u_int ret; | |
694 | ||
695 | debug3("%s entering", __func__); | |
696 | if (!options.use_pam) | |
697 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
698 | ||
699 | buffer_init(&m); | |
700 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
701 | ||
702 | mm_request_receive_expect(pmonitor->m_recvfd, | |
703 | MONITOR_ANS_PAM_ACCOUNT, &m); | |
704 | ret = buffer_get_int(&m); | |
705 | ||
706 | buffer_free(&m); | |
707 | ||
708 | debug3("%s returning %d", __func__, ret); | |
709 | ||
710 | return (ret); | |
711 | } | |
712 | ||
05114c74 | 713 | void * |
714 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
715 | { | |
716 | Buffer m; | |
717 | int success; | |
718 | ||
719 | debug3("%s", __func__); | |
720 | buffer_init(&m); | |
721 | buffer_put_cstring(&m, authctxt->user); | |
722 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
723 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
724 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
725 | success = buffer_get_int(&m); | |
726 | if (success == 0) { | |
727 | debug3("%s: pam_init_ctx failed", __func__); | |
728 | buffer_free(&m); | |
729 | return (NULL); | |
730 | } | |
731 | buffer_free(&m); | |
732 | return (authctxt); | |
733 | } | |
734 | ||
735 | int | |
736 | mm_sshpam_query(void *ctx, char **name, char **info, | |
737 | u_int *num, char ***prompts, u_int **echo_on) | |
738 | { | |
739 | Buffer m; | |
740 | int i, ret; | |
741 | ||
742 | debug3("%s", __func__); | |
743 | buffer_init(&m); | |
744 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
745 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
746 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
747 | ret = buffer_get_int(&m); | |
748 | debug3("%s: pam_query returned %d", __func__, ret); | |
749 | *name = buffer_get_string(&m, NULL); | |
750 | *info = buffer_get_string(&m, NULL); | |
751 | *num = buffer_get_int(&m); | |
752 | *prompts = xmalloc((*num + 1) * sizeof(char *)); | |
753 | *echo_on = xmalloc((*num + 1) * sizeof(u_int)); | |
754 | for (i = 0; i < *num; ++i) { | |
755 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
756 | (*echo_on)[i] = buffer_get_int(&m); | |
757 | } | |
758 | buffer_free(&m); | |
759 | return (ret); | |
760 | } | |
761 | ||
762 | int | |
763 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
764 | { | |
765 | Buffer m; | |
766 | int i, ret; | |
767 | ||
768 | debug3("%s", __func__); | |
769 | buffer_init(&m); | |
770 | buffer_put_int(&m, num); | |
771 | for (i = 0; i < num; ++i) | |
772 | buffer_put_cstring(&m, resp[i]); | |
773 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
774 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
775 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
776 | ret = buffer_get_int(&m); | |
777 | debug3("%s: pam_respond returned %d", __func__, ret); | |
778 | buffer_free(&m); | |
779 | return (ret); | |
780 | } | |
781 | ||
782 | void | |
783 | mm_sshpam_free_ctx(void *ctxtp) | |
784 | { | |
785 | Buffer m; | |
786 | ||
787 | debug3("%s", __func__); | |
788 | buffer_init(&m); | |
789 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
790 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
791 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
792 | buffer_free(&m); | |
793 | } | |
ad200abb | 794 | #endif /* USE_PAM */ |
795 | ||
1853d1ef | 796 | /* Request process termination */ |
797 | ||
798 | void | |
799 | mm_terminate(void) | |
800 | { | |
801 | Buffer m; | |
802 | ||
803 | buffer_init(&m); | |
b5a28cbc | 804 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 805 | buffer_free(&m); |
806 | } | |
807 | ||
808 | int | |
809 | mm_ssh1_session_key(BIGNUM *num) | |
810 | { | |
811 | int rsafail; | |
812 | Buffer m; | |
813 | ||
814 | buffer_init(&m); | |
815 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 816 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 817 | |
b5a28cbc | 818 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 819 | |
820 | rsafail = buffer_get_int(&m); | |
821 | buffer_get_bignum2(&m, num); | |
822 | ||
823 | buffer_free(&m); | |
824 | ||
825 | return (rsafail); | |
826 | } | |
827 | ||
828 | static void | |
829 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
830 | char ***prompts, u_int **echo_on) | |
831 | { | |
7203d6bb | 832 | *name = xstrdup(""); |
833 | *infotxt = xstrdup(""); | |
1853d1ef | 834 | *numprompts = 1; |
343288b8 | 835 | *prompts = xmalloc(*numprompts * sizeof(char *)); |
1853d1ef | 836 | *echo_on = xmalloc(*numprompts * sizeof(u_int)); |
837 | (*echo_on)[0] = 0; | |
838 | } | |
839 | ||
840 | int | |
841 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
842 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
843 | { | |
844 | Buffer m; | |
6d6c25e3 | 845 | u_int success; |
1853d1ef | 846 | char *challenge; |
847 | ||
1588c277 | 848 | debug3("%s: entering", __func__); |
1853d1ef | 849 | |
850 | buffer_init(&m); | |
b5a28cbc | 851 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 852 | |
b5a28cbc | 853 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 854 | &m); |
6d6c25e3 | 855 | success = buffer_get_int(&m); |
856 | if (success == 0) { | |
1588c277 | 857 | debug3("%s: no challenge", __func__); |
1853d1ef | 858 | buffer_free(&m); |
859 | return (-1); | |
860 | } | |
861 | ||
862 | /* Get the challenge, and format the response */ | |
863 | challenge = buffer_get_string(&m, NULL); | |
864 | buffer_free(&m); | |
865 | ||
866 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
867 | (*prompts)[0] = challenge; | |
868 | ||
1588c277 | 869 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 870 | |
871 | return (0); | |
872 | } | |
873 | ||
874 | int | |
875 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
876 | { | |
877 | Buffer m; | |
878 | int authok; | |
879 | ||
1588c277 | 880 | debug3("%s: entering", __func__); |
1853d1ef | 881 | if (numresponses != 1) |
882 | return (-1); | |
883 | ||
884 | buffer_init(&m); | |
885 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 886 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 887 | |
b5a28cbc | 888 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 889 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
890 | ||
891 | authok = buffer_get_int(&m); | |
892 | buffer_free(&m); | |
893 | ||
894 | return ((authok == 0) ? -1 : 0); | |
895 | } | |
896 | ||
897 | int | |
898 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
899 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
900 | { | |
901 | Buffer m; | |
6d6c25e3 | 902 | int len; |
903 | u_int success; | |
1853d1ef | 904 | char *p, *challenge; |
905 | ||
1588c277 | 906 | debug3("%s: entering", __func__); |
1853d1ef | 907 | |
908 | buffer_init(&m); | |
b5a28cbc | 909 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 910 | |
b5a28cbc | 911 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 912 | &m); |
6d6c25e3 | 913 | success = buffer_get_int(&m); |
914 | if (success == 0) { | |
1588c277 | 915 | debug3("%s: no challenge", __func__); |
1853d1ef | 916 | buffer_free(&m); |
917 | return (-1); | |
918 | } | |
919 | ||
920 | /* Get the challenge, and format the response */ | |
921 | challenge = buffer_get_string(&m, NULL); | |
922 | buffer_free(&m); | |
923 | ||
1588c277 | 924 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 925 | |
926 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
927 | ||
928 | len = strlen(challenge) + strlen(SKEY_PROMPT) + 1; | |
929 | p = xmalloc(len); | |
930 | strlcpy(p, challenge, len); | |
931 | strlcat(p, SKEY_PROMPT, len); | |
932 | (*prompts)[0] = p; | |
933 | xfree(challenge); | |
934 | ||
935 | return (0); | |
936 | } | |
937 | ||
938 | int | |
939 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
940 | { | |
941 | Buffer m; | |
942 | int authok; | |
943 | ||
1588c277 | 944 | debug3("%s: entering", __func__); |
1853d1ef | 945 | if (numresponses != 1) |
946 | return (-1); | |
947 | ||
948 | buffer_init(&m); | |
949 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 950 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 951 | |
b5a28cbc | 952 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 953 | MONITOR_ANS_SKEYRESPOND, &m); |
954 | ||
955 | authok = buffer_get_int(&m); | |
956 | buffer_free(&m); | |
957 | ||
958 | return ((authok == 0) ? -1 : 0); | |
959 | } | |
960 | ||
961 | void | |
962 | mm_ssh1_session_id(u_char session_id[16]) | |
963 | { | |
964 | Buffer m; | |
965 | int i; | |
966 | ||
1588c277 | 967 | debug3("%s entering", __func__); |
1853d1ef | 968 | |
969 | buffer_init(&m); | |
970 | for (i = 0; i < 16; i++) | |
971 | buffer_put_char(&m, session_id[i]); | |
972 | ||
b5a28cbc | 973 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 974 | buffer_free(&m); |
975 | } | |
976 | ||
977 | int | |
978 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
979 | { | |
980 | Buffer m; | |
981 | Key *key; | |
982 | u_char *blob; | |
983 | u_int blen; | |
92e15201 | 984 | int allowed = 0, have_forced = 0; |
1853d1ef | 985 | |
1588c277 | 986 | debug3("%s entering", __func__); |
1853d1ef | 987 | |
988 | buffer_init(&m); | |
989 | buffer_put_bignum2(&m, client_n); | |
990 | ||
b5a28cbc | 991 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
992 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 993 | |
994 | allowed = buffer_get_int(&m); | |
995 | ||
92e15201 | 996 | /* fake forced command */ |
997 | auth_clear_options(); | |
998 | have_forced = buffer_get_int(&m); | |
999 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1000 | ||
1853d1ef | 1001 | if (allowed && rkey != NULL) { |
1002 | blob = buffer_get_string(&m, &blen); | |
1003 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1004 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1005 | *rkey = key; |
1006 | xfree(blob); | |
1007 | } | |
1008 | mm_send_debug(&m); | |
1009 | buffer_free(&m); | |
1010 | ||
1011 | return (allowed); | |
1012 | } | |
1013 | ||
1014 | BIGNUM * | |
1015 | mm_auth_rsa_generate_challenge(Key *key) | |
1016 | { | |
1017 | Buffer m; | |
1018 | BIGNUM *challenge; | |
1019 | u_char *blob; | |
1020 | u_int blen; | |
1021 | ||
1588c277 | 1022 | debug3("%s entering", __func__); |
1853d1ef | 1023 | |
1024 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1025 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1026 | |
1027 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1028 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1029 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1030 | key->type = KEY_RSA1; |
1031 | ||
1032 | buffer_init(&m); | |
1033 | buffer_put_string(&m, blob, blen); | |
1034 | xfree(blob); | |
1035 | ||
b5a28cbc | 1036 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1037 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1038 | |
1039 | buffer_get_bignum2(&m, challenge); | |
1040 | buffer_free(&m); | |
1041 | ||
1042 | return (challenge); | |
1043 | } | |
1044 | ||
1045 | int | |
1046 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1047 | { | |
1048 | Buffer m; | |
1049 | u_char *blob; | |
1050 | u_int blen; | |
1051 | int success = 0; | |
1052 | ||
1588c277 | 1053 | debug3("%s entering", __func__); |
1853d1ef | 1054 | |
1055 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1056 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1057 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1058 | key->type = KEY_RSA1; |
1059 | ||
1060 | buffer_init(&m); | |
1061 | buffer_put_string(&m, blob, blen); | |
1062 | buffer_put_string(&m, response, 16); | |
1063 | xfree(blob); | |
1064 | ||
b5a28cbc | 1065 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1066 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1067 | |
1068 | success = buffer_get_int(&m); | |
1069 | buffer_free(&m); | |
1070 | ||
1071 | return (success); | |
1072 | } | |
696f6bef | 1073 | |
1074 | #ifdef KRB5 | |
1075 | int | |
1076 | mm_auth_krb5(void *ctx, void *argp, char **userp, void *resp) | |
1077 | { | |
1078 | krb5_data *tkt, *reply; | |
1079 | Buffer m; | |
1080 | int success; | |
1081 | ||
1082 | debug3("%s entering", __func__); | |
1083 | tkt = (krb5_data *) argp; | |
1084 | reply = (krb5_data *) resp; | |
1085 | ||
1086 | buffer_init(&m); | |
1087 | buffer_put_string(&m, tkt->data, tkt->length); | |
1088 | ||
1089 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KRB5, &m); | |
1090 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KRB5, &m); | |
1091 | ||
1092 | success = buffer_get_int(&m); | |
1093 | if (success) { | |
1094 | u_int len; | |
1095 | ||
1096 | *userp = buffer_get_string(&m, NULL); | |
1097 | reply->data = buffer_get_string(&m, &len); | |
1098 | reply->length = len; | |
1099 | } else { | |
1100 | memset(reply, 0, sizeof(*reply)); | |
1101 | *userp = NULL; | |
1102 | } | |
1103 | ||
1104 | buffer_free(&m); | |
1105 | return (success); | |
1106 | } | |
7364bd04 | 1107 | #endif /* KRB5 */ |
1108 | ||
1109 | #ifdef GSSAPI | |
1110 | OM_uint32 | |
1111 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID oid) | |
1112 | { | |
1113 | Buffer m; | |
1114 | OM_uint32 major; | |
1115 | ||
1116 | /* Client doesn't get to see the context */ | |
1117 | *ctx = NULL; | |
1118 | ||
1119 | buffer_init(&m); | |
1120 | buffer_put_string(&m, oid->elements, oid->length); | |
1121 | ||
1122 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1123 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1124 | ||
1125 | major = buffer_get_int(&m); | |
1126 | ||
1127 | buffer_free(&m); | |
1128 | return (major); | |
1129 | } | |
1130 | ||
1131 | OM_uint32 | |
1132 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1133 | gss_buffer_desc *out, OM_uint32 *flags) | |
1134 | { | |
1135 | Buffer m; | |
1136 | OM_uint32 major; | |
1137 | ||
1138 | buffer_init(&m); | |
1139 | buffer_put_string(&m, in->value, in->length); | |
1140 | ||
1141 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1142 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1143 | ||
1144 | major = buffer_get_int(&m); | |
1145 | out->value = buffer_get_string(&m, &out->length); | |
1146 | if (flags) | |
1147 | *flags = buffer_get_int(&m); | |
1148 | ||
1149 | buffer_free(&m); | |
1150 | ||
1151 | return (major); | |
1152 | } | |
1153 | ||
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 */ |