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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" | |
be2ca0c9 | 28 | RCSID("$OpenBSD: monitor_wrap.c,v 1.39 2004/07/17 05:31:41 dtucker 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" | |
a655c012 | 43 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
44 | #undef TARGET_OS_MAC | |
9b08c23f | 45 | #include "zlib.h" |
a655c012 | 46 | #define TARGET_OS_MAC 1 |
47 | #else | |
48 | #include "zlib.h" | |
49 | #endif | |
1853d1ef | 50 | #include "monitor.h" |
51 | #include "monitor_wrap.h" | |
52 | #include "xmalloc.h" | |
53 | #include "atomicio.h" | |
54 | #include "monitor_fdpass.h" | |
55 | #include "getput.h" | |
7fceb20d | 56 | #include "servconf.h" |
1853d1ef | 57 | |
58 | #include "auth.h" | |
59 | #include "channels.h" | |
60 | #include "session.h" | |
61 | ||
7364bd04 | 62 | #ifdef GSSAPI |
63 | #include "ssh-gss.h" | |
64 | #endif | |
65 | ||
1853d1ef | 66 | /* Imports */ |
67 | extern int compat20; | |
68 | extern Newkeys *newkeys[]; | |
69 | extern z_stream incoming_stream; | |
70 | extern z_stream outgoing_stream; | |
b5a28cbc | 71 | extern struct monitor *pmonitor; |
1853d1ef | 72 | extern Buffer input, output; |
be2ca0c9 | 73 | extern Buffer loginmsg; |
7fceb20d | 74 | extern ServerOptions options; |
1853d1ef | 75 | |
2362db19 | 76 | int |
77 | mm_is_monitor(void) | |
78 | { | |
79 | /* | |
80 | * m_pid is only set in the privileged part, and | |
81 | * points to the unprivileged child. | |
82 | */ | |
74677ba3 | 83 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 84 | } |
85 | ||
1853d1ef | 86 | void |
ca75d7de | 87 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 88 | { |
1853d1ef | 89 | u_int mlen = buffer_len(m); |
405a0d43 | 90 | u_char buf[5]; |
1853d1ef | 91 | |
1588c277 | 92 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 93 | |
94 | PUT_32BIT(buf, mlen + 1); | |
7203d6bb | 95 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
ca75d7de | 96 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
1588c277 | 97 | fatal("%s: write", __func__); |
ca75d7de | 98 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
1588c277 | 99 | fatal("%s: write", __func__); |
1853d1ef | 100 | } |
101 | ||
102 | void | |
ca75d7de | 103 | mm_request_receive(int sock, Buffer *m) |
1853d1ef | 104 | { |
105 | u_char buf[4]; | |
1853d1ef | 106 | u_int msg_len; |
405a0d43 | 107 | ssize_t res; |
1853d1ef | 108 | |
1588c277 | 109 | debug3("%s entering", __func__); |
1853d1ef | 110 | |
ca75d7de | 111 | res = atomicio(read, sock, buf, sizeof(buf)); |
1853d1ef | 112 | if (res != sizeof(buf)) { |
113 | if (res == 0) | |
2362db19 | 114 | cleanup_exit(255); |
1588c277 | 115 | fatal("%s: read: %ld", __func__, (long)res); |
1853d1ef | 116 | } |
117 | msg_len = GET_32BIT(buf); | |
118 | if (msg_len > 256 * 1024) | |
1588c277 | 119 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 120 | buffer_clear(m); |
121 | buffer_append_space(m, msg_len); | |
ca75d7de | 122 | res = atomicio(read, sock, buffer_ptr(m), msg_len); |
1853d1ef | 123 | if (res != msg_len) |
1588c277 | 124 | fatal("%s: read: %ld != msg_len", __func__, (long)res); |
1853d1ef | 125 | } |
126 | ||
127 | void | |
ca75d7de | 128 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 129 | { |
130 | u_char rtype; | |
131 | ||
1588c277 | 132 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 133 | |
ca75d7de | 134 | mm_request_receive(sock, m); |
1853d1ef | 135 | rtype = buffer_get_char(m); |
136 | if (rtype != type) | |
1588c277 | 137 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 138 | rtype, type); |
139 | } | |
140 | ||
141 | DH * | |
142 | mm_choose_dh(int min, int nbits, int max) | |
143 | { | |
144 | BIGNUM *p, *g; | |
145 | int success = 0; | |
146 | Buffer m; | |
147 | ||
148 | buffer_init(&m); | |
149 | buffer_put_int(&m, min); | |
150 | buffer_put_int(&m, nbits); | |
151 | buffer_put_int(&m, max); | |
152 | ||
b5a28cbc | 153 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 154 | |
1588c277 | 155 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 156 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 157 | |
158 | success = buffer_get_char(&m); | |
159 | if (success == 0) | |
1588c277 | 160 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 161 | |
162 | if ((p = BN_new()) == NULL) | |
1588c277 | 163 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 164 | if ((g = BN_new()) == NULL) |
1588c277 | 165 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 166 | buffer_get_bignum2(&m, p); |
167 | buffer_get_bignum2(&m, g); | |
168 | ||
1588c277 | 169 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 170 | buffer_free(&m); |
171 | ||
172 | return (dh_new_group(g, p)); | |
173 | } | |
174 | ||
175 | int | |
176 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
177 | { | |
b5a28cbc | 178 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 179 | Buffer m; |
180 | ||
1588c277 | 181 | debug3("%s entering", __func__); |
1853d1ef | 182 | |
183 | buffer_init(&m); | |
184 | buffer_put_int(&m, kex->host_key_index(key)); | |
185 | buffer_put_string(&m, data, datalen); | |
186 | ||
b5a28cbc | 187 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 188 | |
1588c277 | 189 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 190 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 191 | *sigp = buffer_get_string(&m, lenp); |
192 | buffer_free(&m); | |
193 | ||
194 | return (0); | |
195 | } | |
196 | ||
197 | struct passwd * | |
18a8f313 | 198 | mm_getpwnamallow(const char *username) |
1853d1ef | 199 | { |
200 | Buffer m; | |
201 | struct passwd *pw; | |
202 | u_int pwlen; | |
203 | ||
1588c277 | 204 | debug3("%s entering", __func__); |
1853d1ef | 205 | |
206 | buffer_init(&m); | |
18a8f313 | 207 | buffer_put_cstring(&m, username); |
1853d1ef | 208 | |
b5a28cbc | 209 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 210 | |
1588c277 | 211 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 212 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 213 | |
214 | if (buffer_get_char(&m) == 0) { | |
215 | buffer_free(&m); | |
216 | return (NULL); | |
217 | } | |
218 | pw = buffer_get_string(&m, &pwlen); | |
219 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 220 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 221 | pw->pw_name = buffer_get_string(&m, NULL); |
222 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
223 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 224 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 225 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 226 | #endif |
1853d1ef | 227 | pw->pw_dir = buffer_get_string(&m, NULL); |
228 | pw->pw_shell = buffer_get_string(&m, NULL); | |
229 | buffer_free(&m); | |
230 | ||
231 | return (pw); | |
232 | } | |
233 | ||
02cd6c56 | 234 | char * |
235 | mm_auth2_read_banner(void) | |
94a73cdc | 236 | { |
237 | Buffer m; | |
238 | char *banner; | |
239 | ||
1588c277 | 240 | debug3("%s entering", __func__); |
94a73cdc | 241 | |
242 | buffer_init(&m); | |
b5a28cbc | 243 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 244 | buffer_clear(&m); |
245 | ||
02cd6c56 | 246 | mm_request_receive_expect(pmonitor->m_recvfd, |
247 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 248 | banner = buffer_get_string(&m, NULL); |
249 | buffer_free(&m); | |
7203d6bb | 250 | |
02cd6c56 | 251 | /* treat empty banner as missing banner */ |
252 | if (strlen(banner) == 0) { | |
253 | xfree(banner); | |
254 | banner = NULL; | |
255 | } | |
94a73cdc | 256 | return (banner); |
257 | } | |
258 | ||
1853d1ef | 259 | /* Inform the privileged process about service and style */ |
260 | ||
261 | void | |
262 | mm_inform_authserv(char *service, char *style) | |
263 | { | |
264 | Buffer m; | |
265 | ||
1588c277 | 266 | debug3("%s entering", __func__); |
1853d1ef | 267 | |
268 | buffer_init(&m); | |
269 | buffer_put_cstring(&m, service); | |
270 | buffer_put_cstring(&m, style ? style : ""); | |
271 | ||
b5a28cbc | 272 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 273 | |
274 | buffer_free(&m); | |
275 | } | |
276 | ||
277 | /* Do the password authentication */ | |
278 | int | |
279 | mm_auth_password(Authctxt *authctxt, char *password) | |
280 | { | |
281 | Buffer m; | |
282 | int authenticated = 0; | |
283 | ||
1588c277 | 284 | debug3("%s entering", __func__); |
1853d1ef | 285 | |
286 | buffer_init(&m); | |
287 | buffer_put_cstring(&m, password); | |
b5a28cbc | 288 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 289 | |
1588c277 | 290 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 291 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 292 | |
293 | authenticated = buffer_get_int(&m); | |
294 | ||
295 | buffer_free(&m); | |
296 | ||
297 | debug3("%s: user %sauthenticated", | |
1588c277 | 298 | __func__, authenticated ? "" : "not "); |
1853d1ef | 299 | return (authenticated); |
300 | } | |
301 | ||
302 | int | |
303 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
304 | { | |
305 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
306 | } | |
307 | ||
308 | int | |
309 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
310 | Key *key) | |
311 | { | |
312 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
313 | } | |
314 | ||
315 | int | |
316 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
317 | char *host, Key *key) | |
318 | { | |
319 | int ret; | |
320 | ||
321 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
322 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
323 | key->type = KEY_RSA1; | |
324 | return (ret); | |
325 | } | |
326 | ||
327 | static void | |
328 | mm_send_debug(Buffer *m) | |
329 | { | |
330 | char *msg; | |
331 | ||
332 | while (buffer_len(m)) { | |
333 | msg = buffer_get_string(m, NULL); | |
1588c277 | 334 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 335 | packet_send_debug("%s", msg); |
336 | xfree(msg); | |
337 | } | |
338 | } | |
339 | ||
340 | int | |
341 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
342 | { | |
343 | Buffer m; | |
344 | u_char *blob; | |
345 | u_int len; | |
92e15201 | 346 | int allowed = 0, have_forced = 0; |
1853d1ef | 347 | |
1588c277 | 348 | debug3("%s entering", __func__); |
1853d1ef | 349 | |
350 | /* Convert the key to a blob and the pass it over */ | |
351 | if (!key_to_blob(key, &blob, &len)) | |
352 | return (0); | |
353 | ||
354 | buffer_init(&m); | |
355 | buffer_put_int(&m, type); | |
356 | buffer_put_cstring(&m, user ? user : ""); | |
357 | buffer_put_cstring(&m, host ? host : ""); | |
358 | buffer_put_string(&m, blob, len); | |
359 | xfree(blob); | |
360 | ||
b5a28cbc | 361 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 362 | |
1588c277 | 363 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 364 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 365 | |
366 | allowed = buffer_get_int(&m); | |
367 | ||
92e15201 | 368 | /* fake forced command */ |
369 | auth_clear_options(); | |
370 | have_forced = buffer_get_int(&m); | |
371 | forced_command = have_forced ? xstrdup("true") : NULL; | |
372 | ||
1853d1ef | 373 | /* Send potential debug messages */ |
374 | mm_send_debug(&m); | |
375 | ||
376 | buffer_free(&m); | |
377 | ||
378 | return (allowed); | |
379 | } | |
380 | ||
381 | /* | |
382 | * This key verify needs to send the key type along, because the | |
383 | * privileged parent makes the decision if the key is allowed | |
384 | * for authentication. | |
385 | */ | |
386 | ||
387 | int | |
388 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
389 | { | |
390 | Buffer m; | |
391 | u_char *blob; | |
392 | u_int len; | |
393 | int verified = 0; | |
394 | ||
1588c277 | 395 | debug3("%s entering", __func__); |
1853d1ef | 396 | |
397 | /* Convert the key to a blob and the pass it over */ | |
398 | if (!key_to_blob(key, &blob, &len)) | |
399 | return (0); | |
400 | ||
401 | buffer_init(&m); | |
402 | buffer_put_string(&m, blob, len); | |
403 | buffer_put_string(&m, sig, siglen); | |
404 | buffer_put_string(&m, data, datalen); | |
405 | xfree(blob); | |
406 | ||
b5a28cbc | 407 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 408 | |
1588c277 | 409 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 410 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 411 | |
412 | verified = buffer_get_int(&m); | |
413 | ||
414 | buffer_free(&m); | |
415 | ||
416 | return (verified); | |
417 | } | |
418 | ||
419 | /* Export key state after authentication */ | |
420 | Newkeys * | |
421 | mm_newkeys_from_blob(u_char *blob, int blen) | |
422 | { | |
423 | Buffer b; | |
424 | u_int len; | |
425 | Newkeys *newkey = NULL; | |
426 | Enc *enc; | |
427 | Mac *mac; | |
428 | Comp *comp; | |
429 | ||
1588c277 | 430 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 431 | #ifdef DEBUG_PK |
432 | dump_base64(stderr, blob, blen); | |
433 | #endif | |
434 | buffer_init(&b); | |
435 | buffer_append(&b, blob, blen); | |
436 | ||
437 | newkey = xmalloc(sizeof(*newkey)); | |
438 | enc = &newkey->enc; | |
439 | mac = &newkey->mac; | |
440 | comp = &newkey->comp; | |
441 | ||
442 | /* Enc structure */ | |
443 | enc->name = buffer_get_string(&b, NULL); | |
444 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
445 | enc->enabled = buffer_get_int(&b); | |
446 | enc->block_size = buffer_get_int(&b); | |
447 | enc->key = buffer_get_string(&b, &enc->key_len); | |
448 | enc->iv = buffer_get_string(&b, &len); | |
449 | if (len != enc->block_size) | |
bb0640b2 | 450 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 451 | enc->block_size, len); |
452 | ||
453 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 454 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 455 | enc->name, enc->cipher); |
456 | ||
457 | /* Mac structure */ | |
458 | mac->name = buffer_get_string(&b, NULL); | |
459 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 460 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 461 | mac->enabled = buffer_get_int(&b); |
462 | mac->key = buffer_get_string(&b, &len); | |
463 | if (len > mac->key_len) | |
bb0640b2 | 464 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 465 | mac->key_len); |
466 | mac->key_len = len; | |
467 | ||
468 | /* Comp structure */ | |
469 | comp->type = buffer_get_int(&b); | |
470 | comp->enabled = buffer_get_int(&b); | |
471 | comp->name = buffer_get_string(&b, NULL); | |
472 | ||
473 | len = buffer_len(&b); | |
474 | if (len != 0) | |
bb0640b2 | 475 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 476 | buffer_free(&b); |
477 | return (newkey); | |
478 | } | |
479 | ||
480 | int | |
481 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
482 | { | |
483 | Buffer b; | |
484 | int len; | |
1853d1ef | 485 | Enc *enc; |
486 | Mac *mac; | |
487 | Comp *comp; | |
488 | Newkeys *newkey = newkeys[mode]; | |
489 | ||
1588c277 | 490 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 491 | |
492 | if (newkey == NULL) { | |
1588c277 | 493 | error("%s: newkey == NULL", __func__); |
1853d1ef | 494 | return 0; |
495 | } | |
496 | enc = &newkey->enc; | |
497 | mac = &newkey->mac; | |
498 | comp = &newkey->comp; | |
499 | ||
500 | buffer_init(&b); | |
501 | /* Enc structure */ | |
502 | buffer_put_cstring(&b, enc->name); | |
503 | /* The cipher struct is constant and shared, you export pointer */ | |
504 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
505 | buffer_put_int(&b, enc->enabled); | |
506 | buffer_put_int(&b, enc->block_size); | |
507 | buffer_put_string(&b, enc->key, enc->key_len); | |
508 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
509 | buffer_put_string(&b, enc->iv, enc->block_size); | |
510 | ||
511 | /* Mac structure */ | |
512 | buffer_put_cstring(&b, mac->name); | |
513 | buffer_put_int(&b, mac->enabled); | |
514 | buffer_put_string(&b, mac->key, mac->key_len); | |
515 | ||
516 | /* Comp structure */ | |
517 | buffer_put_int(&b, comp->type); | |
518 | buffer_put_int(&b, comp->enabled); | |
519 | buffer_put_cstring(&b, comp->name); | |
520 | ||
521 | len = buffer_len(&b); | |
1853d1ef | 522 | if (lenp != NULL) |
523 | *lenp = len; | |
eb9f2fab | 524 | if (blobp != NULL) { |
525 | *blobp = xmalloc(len); | |
526 | memcpy(*blobp, buffer_ptr(&b), len); | |
527 | } | |
528 | memset(buffer_ptr(&b), 0, len); | |
529 | buffer_free(&b); | |
1853d1ef | 530 | return len; |
531 | } | |
532 | ||
533 | static void | |
534 | mm_send_kex(Buffer *m, Kex *kex) | |
535 | { | |
536 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
537 | buffer_put_int(m, kex->we_need); | |
538 | buffer_put_int(m, kex->hostkey_type); | |
539 | buffer_put_int(m, kex->kex_type); | |
540 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
541 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
542 | buffer_put_int(m, kex->flags); | |
543 | buffer_put_cstring(m, kex->client_version_string); | |
544 | buffer_put_cstring(m, kex->server_version_string); | |
545 | } | |
546 | ||
547 | void | |
ca75d7de | 548 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 549 | { |
550 | Buffer m; | |
551 | u_char *blob, *p; | |
552 | u_int bloblen, plen; | |
ffd7b36b | 553 | u_int32_t seqnr, packets; |
554 | u_int64_t blocks; | |
1853d1ef | 555 | |
556 | buffer_init(&m); | |
557 | ||
558 | if (!compat20) { | |
559 | u_char iv[24]; | |
9459414c | 560 | u_char *key; |
561 | u_int ivlen, keylen; | |
1853d1ef | 562 | |
563 | buffer_put_int(&m, packet_get_protocol_flags()); | |
564 | ||
565 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
566 | ||
9459414c | 567 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
568 | keylen = packet_get_encryption_key(NULL); | |
569 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
570 | keylen = packet_get_encryption_key(key); | |
571 | buffer_put_string(&m, key, keylen); | |
572 | memset(key, 0, keylen); | |
573 | xfree(key); | |
574 | ||
1853d1ef | 575 | ivlen = packet_get_keyiv_len(MODE_OUT); |
576 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
577 | buffer_put_string(&m, iv, ivlen); | |
578 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
579 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
580 | buffer_put_string(&m, iv, ivlen); | |
581 | goto skip; | |
582 | } else { | |
583 | /* Kex for rekeying */ | |
ca75d7de | 584 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 585 | } |
586 | ||
587 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 588 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 589 | |
590 | /* Keys from Kex */ | |
591 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 592 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 593 | |
594 | buffer_put_string(&m, blob, bloblen); | |
595 | xfree(blob); | |
596 | ||
597 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 598 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 599 | |
600 | buffer_put_string(&m, blob, bloblen); | |
601 | xfree(blob); | |
602 | ||
ffd7b36b | 603 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
604 | buffer_put_int(&m, seqnr); | |
605 | buffer_put_int64(&m, blocks); | |
606 | buffer_put_int(&m, packets); | |
806e4c11 | 607 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 608 | buffer_put_int(&m, seqnr); |
609 | buffer_put_int64(&m, blocks); | |
610 | buffer_put_int(&m, packets); | |
1853d1ef | 611 | |
1588c277 | 612 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 613 | skip: |
614 | /* More key context */ | |
615 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
616 | p = xmalloc(plen+1); | |
617 | packet_get_keycontext(MODE_OUT, p); | |
618 | buffer_put_string(&m, p, plen); | |
619 | xfree(p); | |
620 | ||
621 | plen = packet_get_keycontext(MODE_IN, NULL); | |
622 | p = xmalloc(plen+1); | |
623 | packet_get_keycontext(MODE_IN, p); | |
624 | buffer_put_string(&m, p, plen); | |
625 | xfree(p); | |
626 | ||
627 | /* Compression state */ | |
1588c277 | 628 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 629 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
630 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
631 | ||
632 | /* Network I/O buffers */ | |
633 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
634 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
635 | ||
ca75d7de | 636 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 637 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 638 | |
639 | buffer_free(&m); | |
640 | } | |
641 | ||
642 | int | |
643 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) | |
644 | { | |
645 | Buffer m; | |
be2ca0c9 | 646 | char *p, *msg; |
1853d1ef | 647 | int success = 0; |
648 | ||
649 | buffer_init(&m); | |
b5a28cbc | 650 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 651 | |
1588c277 | 652 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 653 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 654 | |
655 | success = buffer_get_int(&m); | |
656 | if (success == 0) { | |
1588c277 | 657 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 658 | buffer_free(&m); |
659 | return (0); | |
660 | } | |
661 | p = buffer_get_string(&m, NULL); | |
be2ca0c9 | 662 | msg = buffer_get_string(&m, NULL); |
1853d1ef | 663 | buffer_free(&m); |
664 | ||
665 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
666 | xfree(p); | |
667 | ||
be2ca0c9 | 668 | buffer_append(&loginmsg, msg, strlen(msg)); |
669 | xfree(msg); | |
670 | ||
b5a28cbc | 671 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
672 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 673 | |
674 | /* Success */ | |
675 | return (1); | |
676 | } | |
677 | ||
678 | void | |
2362db19 | 679 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 680 | { |
1853d1ef | 681 | Buffer m; |
682 | ||
683 | if (s->ttyfd == -1) | |
684 | return; | |
685 | buffer_init(&m); | |
686 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 687 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 688 | buffer_free(&m); |
689 | ||
690 | /* closed dup'ed master */ | |
691 | if (close(s->ptymaster) < 0) | |
692 | error("close(s->ptymaster): %s", strerror(errno)); | |
693 | ||
694 | /* unlink pty from session */ | |
695 | s->ttyfd = -1; | |
696 | } | |
697 | ||
ad200abb | 698 | #ifdef USE_PAM |
699 | void | |
529d73ab | 700 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 701 | { |
702 | Buffer m; | |
703 | ||
1588c277 | 704 | debug3("%s entering", __func__); |
7fceb20d | 705 | if (!options.use_pam) |
706 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 707 | |
708 | buffer_init(&m); | |
b5a28cbc | 709 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 710 | |
711 | buffer_free(&m); | |
712 | } | |
05114c74 | 713 | |
5b9e2464 | 714 | u_int |
715 | mm_do_pam_account(void) | |
716 | { | |
717 | Buffer m; | |
718 | u_int ret; | |
719 | ||
720 | debug3("%s entering", __func__); | |
721 | if (!options.use_pam) | |
722 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
723 | ||
724 | buffer_init(&m); | |
725 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
726 | ||
aff51935 | 727 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 728 | MONITOR_ANS_PAM_ACCOUNT, &m); |
729 | ret = buffer_get_int(&m); | |
730 | ||
731 | buffer_free(&m); | |
b6453d99 | 732 | |
5b9e2464 | 733 | debug3("%s returning %d", __func__, ret); |
734 | ||
735 | return (ret); | |
736 | } | |
737 | ||
05114c74 | 738 | void * |
739 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
740 | { | |
741 | Buffer m; | |
742 | int success; | |
743 | ||
744 | debug3("%s", __func__); | |
745 | buffer_init(&m); | |
746 | buffer_put_cstring(&m, authctxt->user); | |
747 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
748 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
749 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
750 | success = buffer_get_int(&m); | |
751 | if (success == 0) { | |
752 | debug3("%s: pam_init_ctx failed", __func__); | |
753 | buffer_free(&m); | |
754 | return (NULL); | |
755 | } | |
756 | buffer_free(&m); | |
757 | return (authctxt); | |
758 | } | |
759 | ||
760 | int | |
761 | mm_sshpam_query(void *ctx, char **name, char **info, | |
762 | u_int *num, char ***prompts, u_int **echo_on) | |
763 | { | |
764 | Buffer m; | |
765 | int i, ret; | |
766 | ||
767 | debug3("%s", __func__); | |
768 | buffer_init(&m); | |
769 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
770 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
771 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
772 | ret = buffer_get_int(&m); | |
773 | debug3("%s: pam_query returned %d", __func__, ret); | |
774 | *name = buffer_get_string(&m, NULL); | |
775 | *info = buffer_get_string(&m, NULL); | |
776 | *num = buffer_get_int(&m); | |
777 | *prompts = xmalloc((*num + 1) * sizeof(char *)); | |
778 | *echo_on = xmalloc((*num + 1) * sizeof(u_int)); | |
779 | for (i = 0; i < *num; ++i) { | |
780 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
781 | (*echo_on)[i] = buffer_get_int(&m); | |
782 | } | |
783 | buffer_free(&m); | |
784 | return (ret); | |
785 | } | |
786 | ||
787 | int | |
788 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
789 | { | |
790 | Buffer m; | |
791 | int i, ret; | |
792 | ||
793 | debug3("%s", __func__); | |
794 | buffer_init(&m); | |
795 | buffer_put_int(&m, num); | |
796 | for (i = 0; i < num; ++i) | |
797 | buffer_put_cstring(&m, resp[i]); | |
798 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
799 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
800 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
801 | ret = buffer_get_int(&m); | |
802 | debug3("%s: pam_respond returned %d", __func__, ret); | |
803 | buffer_free(&m); | |
804 | return (ret); | |
805 | } | |
806 | ||
807 | void | |
808 | mm_sshpam_free_ctx(void *ctxtp) | |
809 | { | |
810 | Buffer m; | |
811 | ||
812 | debug3("%s", __func__); | |
813 | buffer_init(&m); | |
814 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
815 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
816 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
817 | buffer_free(&m); | |
818 | } | |
ad200abb | 819 | #endif /* USE_PAM */ |
820 | ||
1853d1ef | 821 | /* Request process termination */ |
822 | ||
823 | void | |
824 | mm_terminate(void) | |
825 | { | |
826 | Buffer m; | |
827 | ||
828 | buffer_init(&m); | |
b5a28cbc | 829 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 830 | buffer_free(&m); |
831 | } | |
832 | ||
833 | int | |
834 | mm_ssh1_session_key(BIGNUM *num) | |
835 | { | |
836 | int rsafail; | |
837 | Buffer m; | |
838 | ||
839 | buffer_init(&m); | |
840 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 841 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 842 | |
b5a28cbc | 843 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 844 | |
845 | rsafail = buffer_get_int(&m); | |
846 | buffer_get_bignum2(&m, num); | |
847 | ||
848 | buffer_free(&m); | |
849 | ||
850 | return (rsafail); | |
851 | } | |
852 | ||
853 | static void | |
854 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
855 | char ***prompts, u_int **echo_on) | |
856 | { | |
7203d6bb | 857 | *name = xstrdup(""); |
858 | *infotxt = xstrdup(""); | |
1853d1ef | 859 | *numprompts = 1; |
343288b8 | 860 | *prompts = xmalloc(*numprompts * sizeof(char *)); |
1853d1ef | 861 | *echo_on = xmalloc(*numprompts * sizeof(u_int)); |
862 | (*echo_on)[0] = 0; | |
863 | } | |
864 | ||
865 | int | |
866 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
867 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
868 | { | |
869 | Buffer m; | |
6d6c25e3 | 870 | u_int success; |
1853d1ef | 871 | char *challenge; |
872 | ||
1588c277 | 873 | debug3("%s: entering", __func__); |
1853d1ef | 874 | |
875 | buffer_init(&m); | |
b5a28cbc | 876 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 877 | |
b5a28cbc | 878 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 879 | &m); |
6d6c25e3 | 880 | success = buffer_get_int(&m); |
881 | if (success == 0) { | |
1588c277 | 882 | debug3("%s: no challenge", __func__); |
1853d1ef | 883 | buffer_free(&m); |
884 | return (-1); | |
885 | } | |
886 | ||
887 | /* Get the challenge, and format the response */ | |
888 | challenge = buffer_get_string(&m, NULL); | |
889 | buffer_free(&m); | |
890 | ||
891 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
892 | (*prompts)[0] = challenge; | |
893 | ||
1588c277 | 894 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 895 | |
896 | return (0); | |
897 | } | |
898 | ||
899 | int | |
900 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
901 | { | |
902 | Buffer m; | |
903 | int authok; | |
904 | ||
1588c277 | 905 | debug3("%s: entering", __func__); |
1853d1ef | 906 | if (numresponses != 1) |
907 | return (-1); | |
908 | ||
909 | buffer_init(&m); | |
910 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 911 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 912 | |
b5a28cbc | 913 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 914 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
915 | ||
916 | authok = buffer_get_int(&m); | |
917 | buffer_free(&m); | |
918 | ||
919 | return ((authok == 0) ? -1 : 0); | |
920 | } | |
921 | ||
77751377 | 922 | #ifdef SKEY |
1853d1ef | 923 | int |
924 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
925 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
926 | { | |
927 | Buffer m; | |
6d6c25e3 | 928 | int len; |
929 | u_int success; | |
1853d1ef | 930 | char *p, *challenge; |
931 | ||
1588c277 | 932 | debug3("%s: entering", __func__); |
1853d1ef | 933 | |
934 | buffer_init(&m); | |
b5a28cbc | 935 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 936 | |
b5a28cbc | 937 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 938 | &m); |
6d6c25e3 | 939 | success = buffer_get_int(&m); |
940 | if (success == 0) { | |
1588c277 | 941 | debug3("%s: no challenge", __func__); |
1853d1ef | 942 | buffer_free(&m); |
943 | return (-1); | |
944 | } | |
945 | ||
946 | /* Get the challenge, and format the response */ | |
947 | challenge = buffer_get_string(&m, NULL); | |
948 | buffer_free(&m); | |
949 | ||
1588c277 | 950 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 951 | |
952 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
953 | ||
954 | len = strlen(challenge) + strlen(SKEY_PROMPT) + 1; | |
955 | p = xmalloc(len); | |
956 | strlcpy(p, challenge, len); | |
957 | strlcat(p, SKEY_PROMPT, len); | |
958 | (*prompts)[0] = p; | |
959 | xfree(challenge); | |
960 | ||
961 | return (0); | |
962 | } | |
963 | ||
964 | int | |
965 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
966 | { | |
967 | Buffer m; | |
968 | int authok; | |
969 | ||
1588c277 | 970 | debug3("%s: entering", __func__); |
1853d1ef | 971 | if (numresponses != 1) |
972 | return (-1); | |
973 | ||
974 | buffer_init(&m); | |
975 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 976 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 977 | |
b5a28cbc | 978 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 979 | MONITOR_ANS_SKEYRESPOND, &m); |
980 | ||
981 | authok = buffer_get_int(&m); | |
982 | buffer_free(&m); | |
983 | ||
984 | return ((authok == 0) ? -1 : 0); | |
985 | } | |
77751377 | 986 | #endif /* SKEY */ |
1853d1ef | 987 | |
988 | void | |
989 | mm_ssh1_session_id(u_char session_id[16]) | |
990 | { | |
991 | Buffer m; | |
992 | int i; | |
993 | ||
1588c277 | 994 | debug3("%s entering", __func__); |
1853d1ef | 995 | |
996 | buffer_init(&m); | |
997 | for (i = 0; i < 16; i++) | |
998 | buffer_put_char(&m, session_id[i]); | |
999 | ||
b5a28cbc | 1000 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 1001 | buffer_free(&m); |
1002 | } | |
1003 | ||
1004 | int | |
1005 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1006 | { | |
1007 | Buffer m; | |
1008 | Key *key; | |
1009 | u_char *blob; | |
1010 | u_int blen; | |
92e15201 | 1011 | int allowed = 0, have_forced = 0; |
1853d1ef | 1012 | |
1588c277 | 1013 | debug3("%s entering", __func__); |
1853d1ef | 1014 | |
1015 | buffer_init(&m); | |
1016 | buffer_put_bignum2(&m, client_n); | |
1017 | ||
b5a28cbc | 1018 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1019 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1020 | |
1021 | allowed = buffer_get_int(&m); | |
1022 | ||
92e15201 | 1023 | /* fake forced command */ |
1024 | auth_clear_options(); | |
1025 | have_forced = buffer_get_int(&m); | |
1026 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1027 | ||
1853d1ef | 1028 | if (allowed && rkey != NULL) { |
1029 | blob = buffer_get_string(&m, &blen); | |
1030 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1031 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1032 | *rkey = key; |
1033 | xfree(blob); | |
1034 | } | |
1035 | mm_send_debug(&m); | |
1036 | buffer_free(&m); | |
1037 | ||
1038 | return (allowed); | |
1039 | } | |
1040 | ||
1041 | BIGNUM * | |
1042 | mm_auth_rsa_generate_challenge(Key *key) | |
1043 | { | |
1044 | Buffer m; | |
1045 | BIGNUM *challenge; | |
1046 | u_char *blob; | |
1047 | u_int blen; | |
1048 | ||
1588c277 | 1049 | debug3("%s entering", __func__); |
1853d1ef | 1050 | |
1051 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1052 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1053 | |
1054 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1055 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1056 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1057 | key->type = KEY_RSA1; |
1058 | ||
1059 | buffer_init(&m); | |
1060 | buffer_put_string(&m, blob, blen); | |
1061 | xfree(blob); | |
1062 | ||
b5a28cbc | 1063 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1064 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1065 | |
1066 | buffer_get_bignum2(&m, challenge); | |
1067 | buffer_free(&m); | |
1068 | ||
1069 | return (challenge); | |
1070 | } | |
1071 | ||
1072 | int | |
1073 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1074 | { | |
1075 | Buffer m; | |
1076 | u_char *blob; | |
1077 | u_int blen; | |
1078 | int success = 0; | |
1079 | ||
1588c277 | 1080 | debug3("%s entering", __func__); |
1853d1ef | 1081 | |
1082 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1083 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1084 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1085 | key->type = KEY_RSA1; |
1086 | ||
1087 | buffer_init(&m); | |
1088 | buffer_put_string(&m, blob, blen); | |
1089 | buffer_put_string(&m, response, 16); | |
1090 | xfree(blob); | |
1091 | ||
b5a28cbc | 1092 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1093 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1094 | |
1095 | success = buffer_get_int(&m); | |
1096 | buffer_free(&m); | |
1097 | ||
1098 | return (success); | |
1099 | } | |
696f6bef | 1100 | |
7364bd04 | 1101 | #ifdef GSSAPI |
1102 | OM_uint32 | |
ca75d7de | 1103 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1104 | { |
1105 | Buffer m; | |
1106 | OM_uint32 major; | |
1107 | ||
1108 | /* Client doesn't get to see the context */ | |
1109 | *ctx = NULL; | |
1110 | ||
1111 | buffer_init(&m); | |
ca75d7de | 1112 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1113 | |
1114 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1115 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1116 | ||
1117 | major = buffer_get_int(&m); | |
1118 | ||
1119 | buffer_free(&m); | |
1120 | return (major); | |
1121 | } | |
1122 | ||
1123 | OM_uint32 | |
1124 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1125 | gss_buffer_desc *out, OM_uint32 *flags) | |
1126 | { | |
1127 | Buffer m; | |
1128 | OM_uint32 major; | |
f99e1ca4 | 1129 | u_int len; |
7364bd04 | 1130 | |
1131 | buffer_init(&m); | |
1132 | buffer_put_string(&m, in->value, in->length); | |
1133 | ||
1134 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1135 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1136 | ||
1137 | major = buffer_get_int(&m); | |
f99e1ca4 | 1138 | out->value = buffer_get_string(&m, &len); |
1139 | out->length = len; | |
7364bd04 | 1140 | if (flags) |
1141 | *flags = buffer_get_int(&m); | |
1142 | ||
1143 | buffer_free(&m); | |
1144 | ||
1145 | return (major); | |
1146 | } | |
1147 | ||
0789992b | 1148 | OM_uint32 |
1149 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1150 | { | |
1151 | Buffer m; | |
1152 | OM_uint32 major; | |
1153 | ||
1154 | buffer_init(&m); | |
1155 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1156 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1157 | ||
1158 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1159 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1160 | &m); | |
1161 | ||
1162 | major = buffer_get_int(&m); | |
1163 | buffer_free(&m); | |
1164 | return(major); | |
1165 | } | |
1166 | ||
7364bd04 | 1167 | int |
1168 | mm_ssh_gssapi_userok(char *user) | |
1169 | { | |
1170 | Buffer m; | |
1171 | int authenticated = 0; | |
1172 | ||
1173 | buffer_init(&m); | |
1174 | ||
1175 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1176 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1177 | &m); | |
1178 | ||
1179 | authenticated = buffer_get_int(&m); | |
1180 | ||
1181 | buffer_free(&m); | |
1182 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1183 | return (authenticated); | |
1184 | } | |
1185 | #endif /* GSSAPI */ |