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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" | |
ca75d7de | 28 | RCSID("$OpenBSD: monitor_wrap.c,v 1.36 2004/06/21 17:36:31 avsm 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; |
7fceb20d | 73 | extern ServerOptions options; |
1853d1ef | 74 | |
2362db19 | 75 | int |
76 | mm_is_monitor(void) | |
77 | { | |
78 | /* | |
79 | * m_pid is only set in the privileged part, and | |
80 | * points to the unprivileged child. | |
81 | */ | |
74677ba3 | 82 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 83 | } |
84 | ||
1853d1ef | 85 | void |
ca75d7de | 86 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 87 | { |
1853d1ef | 88 | u_int mlen = buffer_len(m); |
405a0d43 | 89 | u_char buf[5]; |
1853d1ef | 90 | |
1588c277 | 91 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 92 | |
93 | PUT_32BIT(buf, mlen + 1); | |
7203d6bb | 94 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
ca75d7de | 95 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
1588c277 | 96 | fatal("%s: write", __func__); |
ca75d7de | 97 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
1588c277 | 98 | fatal("%s: write", __func__); |
1853d1ef | 99 | } |
100 | ||
101 | void | |
ca75d7de | 102 | mm_request_receive(int sock, Buffer *m) |
1853d1ef | 103 | { |
104 | u_char buf[4]; | |
1853d1ef | 105 | u_int msg_len; |
405a0d43 | 106 | ssize_t res; |
1853d1ef | 107 | |
1588c277 | 108 | debug3("%s entering", __func__); |
1853d1ef | 109 | |
ca75d7de | 110 | res = atomicio(read, sock, buf, sizeof(buf)); |
1853d1ef | 111 | if (res != sizeof(buf)) { |
112 | if (res == 0) | |
2362db19 | 113 | cleanup_exit(255); |
1588c277 | 114 | fatal("%s: read: %ld", __func__, (long)res); |
1853d1ef | 115 | } |
116 | msg_len = GET_32BIT(buf); | |
117 | if (msg_len > 256 * 1024) | |
1588c277 | 118 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 119 | buffer_clear(m); |
120 | buffer_append_space(m, msg_len); | |
ca75d7de | 121 | res = atomicio(read, sock, buffer_ptr(m), msg_len); |
1853d1ef | 122 | if (res != msg_len) |
1588c277 | 123 | fatal("%s: read: %ld != msg_len", __func__, (long)res); |
1853d1ef | 124 | } |
125 | ||
126 | void | |
ca75d7de | 127 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 128 | { |
129 | u_char rtype; | |
130 | ||
1588c277 | 131 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 132 | |
ca75d7de | 133 | mm_request_receive(sock, m); |
1853d1ef | 134 | rtype = buffer_get_char(m); |
135 | if (rtype != type) | |
1588c277 | 136 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 137 | rtype, type); |
138 | } | |
139 | ||
140 | DH * | |
141 | mm_choose_dh(int min, int nbits, int max) | |
142 | { | |
143 | BIGNUM *p, *g; | |
144 | int success = 0; | |
145 | Buffer m; | |
146 | ||
147 | buffer_init(&m); | |
148 | buffer_put_int(&m, min); | |
149 | buffer_put_int(&m, nbits); | |
150 | buffer_put_int(&m, max); | |
151 | ||
b5a28cbc | 152 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 153 | |
1588c277 | 154 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 155 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 156 | |
157 | success = buffer_get_char(&m); | |
158 | if (success == 0) | |
1588c277 | 159 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 160 | |
161 | if ((p = BN_new()) == NULL) | |
1588c277 | 162 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 163 | if ((g = BN_new()) == NULL) |
1588c277 | 164 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 165 | buffer_get_bignum2(&m, p); |
166 | buffer_get_bignum2(&m, g); | |
167 | ||
1588c277 | 168 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 169 | buffer_free(&m); |
170 | ||
171 | return (dh_new_group(g, p)); | |
172 | } | |
173 | ||
174 | int | |
175 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
176 | { | |
b5a28cbc | 177 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 178 | Buffer m; |
179 | ||
1588c277 | 180 | debug3("%s entering", __func__); |
1853d1ef | 181 | |
182 | buffer_init(&m); | |
183 | buffer_put_int(&m, kex->host_key_index(key)); | |
184 | buffer_put_string(&m, data, datalen); | |
185 | ||
b5a28cbc | 186 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 187 | |
1588c277 | 188 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 189 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 190 | *sigp = buffer_get_string(&m, lenp); |
191 | buffer_free(&m); | |
192 | ||
193 | return (0); | |
194 | } | |
195 | ||
196 | struct passwd * | |
197 | mm_getpwnamallow(const char *login) | |
198 | { | |
199 | Buffer m; | |
200 | struct passwd *pw; | |
201 | u_int pwlen; | |
202 | ||
1588c277 | 203 | debug3("%s entering", __func__); |
1853d1ef | 204 | |
205 | buffer_init(&m); | |
206 | buffer_put_cstring(&m, login); | |
207 | ||
b5a28cbc | 208 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 209 | |
1588c277 | 210 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 211 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 212 | |
213 | if (buffer_get_char(&m) == 0) { | |
214 | buffer_free(&m); | |
215 | return (NULL); | |
216 | } | |
217 | pw = buffer_get_string(&m, &pwlen); | |
218 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 219 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 220 | pw->pw_name = buffer_get_string(&m, NULL); |
221 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
222 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 223 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 224 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 225 | #endif |
1853d1ef | 226 | pw->pw_dir = buffer_get_string(&m, NULL); |
227 | pw->pw_shell = buffer_get_string(&m, NULL); | |
228 | buffer_free(&m); | |
229 | ||
230 | return (pw); | |
231 | } | |
232 | ||
02cd6c56 | 233 | char * |
234 | mm_auth2_read_banner(void) | |
94a73cdc | 235 | { |
236 | Buffer m; | |
237 | char *banner; | |
238 | ||
1588c277 | 239 | debug3("%s entering", __func__); |
94a73cdc | 240 | |
241 | buffer_init(&m); | |
b5a28cbc | 242 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 243 | buffer_clear(&m); |
244 | ||
02cd6c56 | 245 | mm_request_receive_expect(pmonitor->m_recvfd, |
246 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 247 | banner = buffer_get_string(&m, NULL); |
248 | buffer_free(&m); | |
7203d6bb | 249 | |
02cd6c56 | 250 | /* treat empty banner as missing banner */ |
251 | if (strlen(banner) == 0) { | |
252 | xfree(banner); | |
253 | banner = NULL; | |
254 | } | |
94a73cdc | 255 | return (banner); |
256 | } | |
257 | ||
1853d1ef | 258 | /* Inform the privileged process about service and style */ |
259 | ||
260 | void | |
261 | mm_inform_authserv(char *service, char *style) | |
262 | { | |
263 | Buffer m; | |
264 | ||
1588c277 | 265 | debug3("%s entering", __func__); |
1853d1ef | 266 | |
267 | buffer_init(&m); | |
268 | buffer_put_cstring(&m, service); | |
269 | buffer_put_cstring(&m, style ? style : ""); | |
270 | ||
b5a28cbc | 271 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 272 | |
273 | buffer_free(&m); | |
274 | } | |
275 | ||
276 | /* Do the password authentication */ | |
277 | int | |
278 | mm_auth_password(Authctxt *authctxt, char *password) | |
279 | { | |
280 | Buffer m; | |
281 | int authenticated = 0; | |
282 | ||
1588c277 | 283 | debug3("%s entering", __func__); |
1853d1ef | 284 | |
285 | buffer_init(&m); | |
286 | buffer_put_cstring(&m, password); | |
b5a28cbc | 287 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 288 | |
1588c277 | 289 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 290 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 291 | |
292 | authenticated = buffer_get_int(&m); | |
293 | ||
294 | buffer_free(&m); | |
295 | ||
296 | debug3("%s: user %sauthenticated", | |
1588c277 | 297 | __func__, authenticated ? "" : "not "); |
1853d1ef | 298 | return (authenticated); |
299 | } | |
300 | ||
301 | int | |
302 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
303 | { | |
304 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
305 | } | |
306 | ||
307 | int | |
308 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
309 | Key *key) | |
310 | { | |
311 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
312 | } | |
313 | ||
314 | int | |
315 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
316 | char *host, Key *key) | |
317 | { | |
318 | int ret; | |
319 | ||
320 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
321 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
322 | key->type = KEY_RSA1; | |
323 | return (ret); | |
324 | } | |
325 | ||
326 | static void | |
327 | mm_send_debug(Buffer *m) | |
328 | { | |
329 | char *msg; | |
330 | ||
331 | while (buffer_len(m)) { | |
332 | msg = buffer_get_string(m, NULL); | |
1588c277 | 333 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 334 | packet_send_debug("%s", msg); |
335 | xfree(msg); | |
336 | } | |
337 | } | |
338 | ||
339 | int | |
340 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
341 | { | |
342 | Buffer m; | |
343 | u_char *blob; | |
344 | u_int len; | |
92e15201 | 345 | int allowed = 0, have_forced = 0; |
1853d1ef | 346 | |
1588c277 | 347 | debug3("%s entering", __func__); |
1853d1ef | 348 | |
349 | /* Convert the key to a blob and the pass it over */ | |
350 | if (!key_to_blob(key, &blob, &len)) | |
351 | return (0); | |
352 | ||
353 | buffer_init(&m); | |
354 | buffer_put_int(&m, type); | |
355 | buffer_put_cstring(&m, user ? user : ""); | |
356 | buffer_put_cstring(&m, host ? host : ""); | |
357 | buffer_put_string(&m, blob, len); | |
358 | xfree(blob); | |
359 | ||
b5a28cbc | 360 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 361 | |
1588c277 | 362 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 363 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 364 | |
365 | allowed = buffer_get_int(&m); | |
366 | ||
92e15201 | 367 | /* fake forced command */ |
368 | auth_clear_options(); | |
369 | have_forced = buffer_get_int(&m); | |
370 | forced_command = have_forced ? xstrdup("true") : NULL; | |
371 | ||
1853d1ef | 372 | /* Send potential debug messages */ |
373 | mm_send_debug(&m); | |
374 | ||
375 | buffer_free(&m); | |
376 | ||
377 | return (allowed); | |
378 | } | |
379 | ||
380 | /* | |
381 | * This key verify needs to send the key type along, because the | |
382 | * privileged parent makes the decision if the key is allowed | |
383 | * for authentication. | |
384 | */ | |
385 | ||
386 | int | |
387 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
388 | { | |
389 | Buffer m; | |
390 | u_char *blob; | |
391 | u_int len; | |
392 | int verified = 0; | |
393 | ||
1588c277 | 394 | debug3("%s entering", __func__); |
1853d1ef | 395 | |
396 | /* Convert the key to a blob and the pass it over */ | |
397 | if (!key_to_blob(key, &blob, &len)) | |
398 | return (0); | |
399 | ||
400 | buffer_init(&m); | |
401 | buffer_put_string(&m, blob, len); | |
402 | buffer_put_string(&m, sig, siglen); | |
403 | buffer_put_string(&m, data, datalen); | |
404 | xfree(blob); | |
405 | ||
b5a28cbc | 406 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 407 | |
1588c277 | 408 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 409 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 410 | |
411 | verified = buffer_get_int(&m); | |
412 | ||
413 | buffer_free(&m); | |
414 | ||
415 | return (verified); | |
416 | } | |
417 | ||
418 | /* Export key state after authentication */ | |
419 | Newkeys * | |
420 | mm_newkeys_from_blob(u_char *blob, int blen) | |
421 | { | |
422 | Buffer b; | |
423 | u_int len; | |
424 | Newkeys *newkey = NULL; | |
425 | Enc *enc; | |
426 | Mac *mac; | |
427 | Comp *comp; | |
428 | ||
1588c277 | 429 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 430 | #ifdef DEBUG_PK |
431 | dump_base64(stderr, blob, blen); | |
432 | #endif | |
433 | buffer_init(&b); | |
434 | buffer_append(&b, blob, blen); | |
435 | ||
436 | newkey = xmalloc(sizeof(*newkey)); | |
437 | enc = &newkey->enc; | |
438 | mac = &newkey->mac; | |
439 | comp = &newkey->comp; | |
440 | ||
441 | /* Enc structure */ | |
442 | enc->name = buffer_get_string(&b, NULL); | |
443 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
444 | enc->enabled = buffer_get_int(&b); | |
445 | enc->block_size = buffer_get_int(&b); | |
446 | enc->key = buffer_get_string(&b, &enc->key_len); | |
447 | enc->iv = buffer_get_string(&b, &len); | |
448 | if (len != enc->block_size) | |
bb0640b2 | 449 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 450 | enc->block_size, len); |
451 | ||
452 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 453 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 454 | enc->name, enc->cipher); |
455 | ||
456 | /* Mac structure */ | |
457 | mac->name = buffer_get_string(&b, NULL); | |
458 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 459 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 460 | mac->enabled = buffer_get_int(&b); |
461 | mac->key = buffer_get_string(&b, &len); | |
462 | if (len > mac->key_len) | |
bb0640b2 | 463 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 464 | mac->key_len); |
465 | mac->key_len = len; | |
466 | ||
467 | /* Comp structure */ | |
468 | comp->type = buffer_get_int(&b); | |
469 | comp->enabled = buffer_get_int(&b); | |
470 | comp->name = buffer_get_string(&b, NULL); | |
471 | ||
472 | len = buffer_len(&b); | |
473 | if (len != 0) | |
bb0640b2 | 474 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 475 | buffer_free(&b); |
476 | return (newkey); | |
477 | } | |
478 | ||
479 | int | |
480 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
481 | { | |
482 | Buffer b; | |
483 | int len; | |
1853d1ef | 484 | Enc *enc; |
485 | Mac *mac; | |
486 | Comp *comp; | |
487 | Newkeys *newkey = newkeys[mode]; | |
488 | ||
1588c277 | 489 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 490 | |
491 | if (newkey == NULL) { | |
1588c277 | 492 | error("%s: newkey == NULL", __func__); |
1853d1ef | 493 | return 0; |
494 | } | |
495 | enc = &newkey->enc; | |
496 | mac = &newkey->mac; | |
497 | comp = &newkey->comp; | |
498 | ||
499 | buffer_init(&b); | |
500 | /* Enc structure */ | |
501 | buffer_put_cstring(&b, enc->name); | |
502 | /* The cipher struct is constant and shared, you export pointer */ | |
503 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
504 | buffer_put_int(&b, enc->enabled); | |
505 | buffer_put_int(&b, enc->block_size); | |
506 | buffer_put_string(&b, enc->key, enc->key_len); | |
507 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
508 | buffer_put_string(&b, enc->iv, enc->block_size); | |
509 | ||
510 | /* Mac structure */ | |
511 | buffer_put_cstring(&b, mac->name); | |
512 | buffer_put_int(&b, mac->enabled); | |
513 | buffer_put_string(&b, mac->key, mac->key_len); | |
514 | ||
515 | /* Comp structure */ | |
516 | buffer_put_int(&b, comp->type); | |
517 | buffer_put_int(&b, comp->enabled); | |
518 | buffer_put_cstring(&b, comp->name); | |
519 | ||
520 | len = buffer_len(&b); | |
1853d1ef | 521 | if (lenp != NULL) |
522 | *lenp = len; | |
eb9f2fab | 523 | if (blobp != NULL) { |
524 | *blobp = xmalloc(len); | |
525 | memcpy(*blobp, buffer_ptr(&b), len); | |
526 | } | |
527 | memset(buffer_ptr(&b), 0, len); | |
528 | buffer_free(&b); | |
1853d1ef | 529 | return len; |
530 | } | |
531 | ||
532 | static void | |
533 | mm_send_kex(Buffer *m, Kex *kex) | |
534 | { | |
535 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
536 | buffer_put_int(m, kex->we_need); | |
537 | buffer_put_int(m, kex->hostkey_type); | |
538 | buffer_put_int(m, kex->kex_type); | |
539 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
540 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
541 | buffer_put_int(m, kex->flags); | |
542 | buffer_put_cstring(m, kex->client_version_string); | |
543 | buffer_put_cstring(m, kex->server_version_string); | |
544 | } | |
545 | ||
546 | void | |
ca75d7de | 547 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 548 | { |
549 | Buffer m; | |
550 | u_char *blob, *p; | |
551 | u_int bloblen, plen; | |
ffd7b36b | 552 | u_int32_t seqnr, packets; |
553 | u_int64_t blocks; | |
1853d1ef | 554 | |
555 | buffer_init(&m); | |
556 | ||
557 | if (!compat20) { | |
558 | u_char iv[24]; | |
9459414c | 559 | u_char *key; |
560 | u_int ivlen, keylen; | |
1853d1ef | 561 | |
562 | buffer_put_int(&m, packet_get_protocol_flags()); | |
563 | ||
564 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
565 | ||
9459414c | 566 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
567 | keylen = packet_get_encryption_key(NULL); | |
568 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
569 | keylen = packet_get_encryption_key(key); | |
570 | buffer_put_string(&m, key, keylen); | |
571 | memset(key, 0, keylen); | |
572 | xfree(key); | |
573 | ||
1853d1ef | 574 | ivlen = packet_get_keyiv_len(MODE_OUT); |
575 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
576 | buffer_put_string(&m, iv, ivlen); | |
577 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
578 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
579 | buffer_put_string(&m, iv, ivlen); | |
580 | goto skip; | |
581 | } else { | |
582 | /* Kex for rekeying */ | |
ca75d7de | 583 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 584 | } |
585 | ||
586 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 587 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 588 | |
589 | /* Keys from Kex */ | |
590 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 591 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 592 | |
593 | buffer_put_string(&m, blob, bloblen); | |
594 | xfree(blob); | |
595 | ||
596 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 597 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 598 | |
599 | buffer_put_string(&m, blob, bloblen); | |
600 | xfree(blob); | |
601 | ||
ffd7b36b | 602 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
603 | buffer_put_int(&m, seqnr); | |
604 | buffer_put_int64(&m, blocks); | |
605 | buffer_put_int(&m, packets); | |
806e4c11 | 606 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 607 | buffer_put_int(&m, seqnr); |
608 | buffer_put_int64(&m, blocks); | |
609 | buffer_put_int(&m, packets); | |
1853d1ef | 610 | |
1588c277 | 611 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 612 | skip: |
613 | /* More key context */ | |
614 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
615 | p = xmalloc(plen+1); | |
616 | packet_get_keycontext(MODE_OUT, p); | |
617 | buffer_put_string(&m, p, plen); | |
618 | xfree(p); | |
619 | ||
620 | plen = packet_get_keycontext(MODE_IN, NULL); | |
621 | p = xmalloc(plen+1); | |
622 | packet_get_keycontext(MODE_IN, p); | |
623 | buffer_put_string(&m, p, plen); | |
624 | xfree(p); | |
625 | ||
626 | /* Compression state */ | |
1588c277 | 627 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 628 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
629 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
630 | ||
631 | /* Network I/O buffers */ | |
632 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
633 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
634 | ||
ca75d7de | 635 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 636 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 637 | |
638 | buffer_free(&m); | |
639 | } | |
640 | ||
641 | int | |
642 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) | |
643 | { | |
644 | Buffer m; | |
661e45a0 | 645 | char *p; |
1853d1ef | 646 | int success = 0; |
647 | ||
648 | buffer_init(&m); | |
b5a28cbc | 649 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 650 | |
1588c277 | 651 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 652 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 653 | |
654 | success = buffer_get_int(&m); | |
655 | if (success == 0) { | |
1588c277 | 656 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 657 | buffer_free(&m); |
658 | return (0); | |
659 | } | |
660 | p = buffer_get_string(&m, NULL); | |
661 | buffer_free(&m); | |
662 | ||
663 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
664 | xfree(p); | |
665 | ||
b5a28cbc | 666 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
667 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 668 | |
669 | /* Success */ | |
670 | return (1); | |
671 | } | |
672 | ||
673 | void | |
2362db19 | 674 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 675 | { |
1853d1ef | 676 | Buffer m; |
677 | ||
678 | if (s->ttyfd == -1) | |
679 | return; | |
680 | buffer_init(&m); | |
681 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 682 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 683 | buffer_free(&m); |
684 | ||
685 | /* closed dup'ed master */ | |
686 | if (close(s->ptymaster) < 0) | |
687 | error("close(s->ptymaster): %s", strerror(errno)); | |
688 | ||
689 | /* unlink pty from session */ | |
690 | s->ttyfd = -1; | |
691 | } | |
692 | ||
ad200abb | 693 | #ifdef USE_PAM |
694 | void | |
529d73ab | 695 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 696 | { |
697 | Buffer m; | |
698 | ||
1588c277 | 699 | debug3("%s entering", __func__); |
7fceb20d | 700 | if (!options.use_pam) |
701 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 702 | |
703 | buffer_init(&m); | |
b5a28cbc | 704 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 705 | |
706 | buffer_free(&m); | |
707 | } | |
05114c74 | 708 | |
5b9e2464 | 709 | u_int |
710 | mm_do_pam_account(void) | |
711 | { | |
712 | Buffer m; | |
713 | u_int ret; | |
714 | ||
715 | debug3("%s entering", __func__); | |
716 | if (!options.use_pam) | |
717 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
718 | ||
719 | buffer_init(&m); | |
720 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
721 | ||
aff51935 | 722 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 723 | MONITOR_ANS_PAM_ACCOUNT, &m); |
724 | ret = buffer_get_int(&m); | |
725 | ||
726 | buffer_free(&m); | |
b6453d99 | 727 | |
5b9e2464 | 728 | debug3("%s returning %d", __func__, ret); |
729 | ||
730 | return (ret); | |
731 | } | |
732 | ||
05114c74 | 733 | void * |
734 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
735 | { | |
736 | Buffer m; | |
737 | int success; | |
738 | ||
739 | debug3("%s", __func__); | |
740 | buffer_init(&m); | |
741 | buffer_put_cstring(&m, authctxt->user); | |
742 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
743 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
744 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
745 | success = buffer_get_int(&m); | |
746 | if (success == 0) { | |
747 | debug3("%s: pam_init_ctx failed", __func__); | |
748 | buffer_free(&m); | |
749 | return (NULL); | |
750 | } | |
751 | buffer_free(&m); | |
752 | return (authctxt); | |
753 | } | |
754 | ||
755 | int | |
756 | mm_sshpam_query(void *ctx, char **name, char **info, | |
757 | u_int *num, char ***prompts, u_int **echo_on) | |
758 | { | |
759 | Buffer m; | |
760 | int i, ret; | |
761 | ||
762 | debug3("%s", __func__); | |
763 | buffer_init(&m); | |
764 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
765 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
766 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
767 | ret = buffer_get_int(&m); | |
768 | debug3("%s: pam_query returned %d", __func__, ret); | |
769 | *name = buffer_get_string(&m, NULL); | |
770 | *info = buffer_get_string(&m, NULL); | |
771 | *num = buffer_get_int(&m); | |
772 | *prompts = xmalloc((*num + 1) * sizeof(char *)); | |
773 | *echo_on = xmalloc((*num + 1) * sizeof(u_int)); | |
774 | for (i = 0; i < *num; ++i) { | |
775 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
776 | (*echo_on)[i] = buffer_get_int(&m); | |
777 | } | |
778 | buffer_free(&m); | |
779 | return (ret); | |
780 | } | |
781 | ||
782 | int | |
783 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
784 | { | |
785 | Buffer m; | |
786 | int i, ret; | |
787 | ||
788 | debug3("%s", __func__); | |
789 | buffer_init(&m); | |
790 | buffer_put_int(&m, num); | |
791 | for (i = 0; i < num; ++i) | |
792 | buffer_put_cstring(&m, resp[i]); | |
793 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
794 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
795 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
796 | ret = buffer_get_int(&m); | |
797 | debug3("%s: pam_respond returned %d", __func__, ret); | |
798 | buffer_free(&m); | |
799 | return (ret); | |
800 | } | |
801 | ||
802 | void | |
803 | mm_sshpam_free_ctx(void *ctxtp) | |
804 | { | |
805 | Buffer m; | |
806 | ||
807 | debug3("%s", __func__); | |
808 | buffer_init(&m); | |
809 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
810 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
811 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
812 | buffer_free(&m); | |
813 | } | |
ad200abb | 814 | #endif /* USE_PAM */ |
815 | ||
1853d1ef | 816 | /* Request process termination */ |
817 | ||
818 | void | |
819 | mm_terminate(void) | |
820 | { | |
821 | Buffer m; | |
822 | ||
823 | buffer_init(&m); | |
b5a28cbc | 824 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 825 | buffer_free(&m); |
826 | } | |
827 | ||
828 | int | |
829 | mm_ssh1_session_key(BIGNUM *num) | |
830 | { | |
831 | int rsafail; | |
832 | Buffer m; | |
833 | ||
834 | buffer_init(&m); | |
835 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 836 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 837 | |
b5a28cbc | 838 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 839 | |
840 | rsafail = buffer_get_int(&m); | |
841 | buffer_get_bignum2(&m, num); | |
842 | ||
843 | buffer_free(&m); | |
844 | ||
845 | return (rsafail); | |
846 | } | |
847 | ||
848 | static void | |
849 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
850 | char ***prompts, u_int **echo_on) | |
851 | { | |
7203d6bb | 852 | *name = xstrdup(""); |
853 | *infotxt = xstrdup(""); | |
1853d1ef | 854 | *numprompts = 1; |
343288b8 | 855 | *prompts = xmalloc(*numprompts * sizeof(char *)); |
1853d1ef | 856 | *echo_on = xmalloc(*numprompts * sizeof(u_int)); |
857 | (*echo_on)[0] = 0; | |
858 | } | |
859 | ||
860 | int | |
861 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
862 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
863 | { | |
864 | Buffer m; | |
6d6c25e3 | 865 | u_int success; |
1853d1ef | 866 | char *challenge; |
867 | ||
1588c277 | 868 | debug3("%s: entering", __func__); |
1853d1ef | 869 | |
870 | buffer_init(&m); | |
b5a28cbc | 871 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 872 | |
b5a28cbc | 873 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 874 | &m); |
6d6c25e3 | 875 | success = buffer_get_int(&m); |
876 | if (success == 0) { | |
1588c277 | 877 | debug3("%s: no challenge", __func__); |
1853d1ef | 878 | buffer_free(&m); |
879 | return (-1); | |
880 | } | |
881 | ||
882 | /* Get the challenge, and format the response */ | |
883 | challenge = buffer_get_string(&m, NULL); | |
884 | buffer_free(&m); | |
885 | ||
886 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
887 | (*prompts)[0] = challenge; | |
888 | ||
1588c277 | 889 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 890 | |
891 | return (0); | |
892 | } | |
893 | ||
894 | int | |
895 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
896 | { | |
897 | Buffer m; | |
898 | int authok; | |
899 | ||
1588c277 | 900 | debug3("%s: entering", __func__); |
1853d1ef | 901 | if (numresponses != 1) |
902 | return (-1); | |
903 | ||
904 | buffer_init(&m); | |
905 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 906 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 907 | |
b5a28cbc | 908 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 909 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
910 | ||
911 | authok = buffer_get_int(&m); | |
912 | buffer_free(&m); | |
913 | ||
914 | return ((authok == 0) ? -1 : 0); | |
915 | } | |
916 | ||
917 | int | |
918 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
919 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
920 | { | |
921 | Buffer m; | |
6d6c25e3 | 922 | int len; |
923 | u_int success; | |
1853d1ef | 924 | char *p, *challenge; |
925 | ||
1588c277 | 926 | debug3("%s: entering", __func__); |
1853d1ef | 927 | |
928 | buffer_init(&m); | |
b5a28cbc | 929 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 930 | |
b5a28cbc | 931 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 932 | &m); |
6d6c25e3 | 933 | success = buffer_get_int(&m); |
934 | if (success == 0) { | |
1588c277 | 935 | debug3("%s: no challenge", __func__); |
1853d1ef | 936 | buffer_free(&m); |
937 | return (-1); | |
938 | } | |
939 | ||
940 | /* Get the challenge, and format the response */ | |
941 | challenge = buffer_get_string(&m, NULL); | |
942 | buffer_free(&m); | |
943 | ||
1588c277 | 944 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 945 | |
946 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
947 | ||
948 | len = strlen(challenge) + strlen(SKEY_PROMPT) + 1; | |
949 | p = xmalloc(len); | |
950 | strlcpy(p, challenge, len); | |
951 | strlcat(p, SKEY_PROMPT, len); | |
952 | (*prompts)[0] = p; | |
953 | xfree(challenge); | |
954 | ||
955 | return (0); | |
956 | } | |
957 | ||
958 | int | |
959 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
960 | { | |
961 | Buffer m; | |
962 | int authok; | |
963 | ||
1588c277 | 964 | debug3("%s: entering", __func__); |
1853d1ef | 965 | if (numresponses != 1) |
966 | return (-1); | |
967 | ||
968 | buffer_init(&m); | |
969 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 970 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 971 | |
b5a28cbc | 972 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 973 | MONITOR_ANS_SKEYRESPOND, &m); |
974 | ||
975 | authok = buffer_get_int(&m); | |
976 | buffer_free(&m); | |
977 | ||
978 | return ((authok == 0) ? -1 : 0); | |
979 | } | |
980 | ||
981 | void | |
982 | mm_ssh1_session_id(u_char session_id[16]) | |
983 | { | |
984 | Buffer m; | |
985 | int i; | |
986 | ||
1588c277 | 987 | debug3("%s entering", __func__); |
1853d1ef | 988 | |
989 | buffer_init(&m); | |
990 | for (i = 0; i < 16; i++) | |
991 | buffer_put_char(&m, session_id[i]); | |
992 | ||
b5a28cbc | 993 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 994 | buffer_free(&m); |
995 | } | |
996 | ||
997 | int | |
998 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
999 | { | |
1000 | Buffer m; | |
1001 | Key *key; | |
1002 | u_char *blob; | |
1003 | u_int blen; | |
92e15201 | 1004 | int allowed = 0, have_forced = 0; |
1853d1ef | 1005 | |
1588c277 | 1006 | debug3("%s entering", __func__); |
1853d1ef | 1007 | |
1008 | buffer_init(&m); | |
1009 | buffer_put_bignum2(&m, client_n); | |
1010 | ||
b5a28cbc | 1011 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1012 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1013 | |
1014 | allowed = buffer_get_int(&m); | |
1015 | ||
92e15201 | 1016 | /* fake forced command */ |
1017 | auth_clear_options(); | |
1018 | have_forced = buffer_get_int(&m); | |
1019 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1020 | ||
1853d1ef | 1021 | if (allowed && rkey != NULL) { |
1022 | blob = buffer_get_string(&m, &blen); | |
1023 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1024 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1025 | *rkey = key; |
1026 | xfree(blob); | |
1027 | } | |
1028 | mm_send_debug(&m); | |
1029 | buffer_free(&m); | |
1030 | ||
1031 | return (allowed); | |
1032 | } | |
1033 | ||
1034 | BIGNUM * | |
1035 | mm_auth_rsa_generate_challenge(Key *key) | |
1036 | { | |
1037 | Buffer m; | |
1038 | BIGNUM *challenge; | |
1039 | u_char *blob; | |
1040 | u_int blen; | |
1041 | ||
1588c277 | 1042 | debug3("%s entering", __func__); |
1853d1ef | 1043 | |
1044 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1045 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1046 | |
1047 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1048 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1049 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1050 | key->type = KEY_RSA1; |
1051 | ||
1052 | buffer_init(&m); | |
1053 | buffer_put_string(&m, blob, blen); | |
1054 | xfree(blob); | |
1055 | ||
b5a28cbc | 1056 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1057 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1058 | |
1059 | buffer_get_bignum2(&m, challenge); | |
1060 | buffer_free(&m); | |
1061 | ||
1062 | return (challenge); | |
1063 | } | |
1064 | ||
1065 | int | |
1066 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1067 | { | |
1068 | Buffer m; | |
1069 | u_char *blob; | |
1070 | u_int blen; | |
1071 | int success = 0; | |
1072 | ||
1588c277 | 1073 | debug3("%s entering", __func__); |
1853d1ef | 1074 | |
1075 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1076 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1077 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1078 | key->type = KEY_RSA1; |
1079 | ||
1080 | buffer_init(&m); | |
1081 | buffer_put_string(&m, blob, blen); | |
1082 | buffer_put_string(&m, response, 16); | |
1083 | xfree(blob); | |
1084 | ||
b5a28cbc | 1085 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1086 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1087 | |
1088 | success = buffer_get_int(&m); | |
1089 | buffer_free(&m); | |
1090 | ||
1091 | return (success); | |
1092 | } | |
696f6bef | 1093 | |
7364bd04 | 1094 | #ifdef GSSAPI |
1095 | OM_uint32 | |
ca75d7de | 1096 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1097 | { |
1098 | Buffer m; | |
1099 | OM_uint32 major; | |
1100 | ||
1101 | /* Client doesn't get to see the context */ | |
1102 | *ctx = NULL; | |
1103 | ||
1104 | buffer_init(&m); | |
ca75d7de | 1105 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1106 | |
1107 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1108 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1109 | ||
1110 | major = buffer_get_int(&m); | |
1111 | ||
1112 | buffer_free(&m); | |
1113 | return (major); | |
1114 | } | |
1115 | ||
1116 | OM_uint32 | |
1117 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1118 | gss_buffer_desc *out, OM_uint32 *flags) | |
1119 | { | |
1120 | Buffer m; | |
1121 | OM_uint32 major; | |
f99e1ca4 | 1122 | u_int len; |
7364bd04 | 1123 | |
1124 | buffer_init(&m); | |
1125 | buffer_put_string(&m, in->value, in->length); | |
1126 | ||
1127 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1128 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1129 | ||
1130 | major = buffer_get_int(&m); | |
f99e1ca4 | 1131 | out->value = buffer_get_string(&m, &len); |
1132 | out->length = len; | |
7364bd04 | 1133 | if (flags) |
1134 | *flags = buffer_get_int(&m); | |
1135 | ||
1136 | buffer_free(&m); | |
1137 | ||
1138 | return (major); | |
1139 | } | |
1140 | ||
0789992b | 1141 | OM_uint32 |
1142 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1143 | { | |
1144 | Buffer m; | |
1145 | OM_uint32 major; | |
1146 | ||
1147 | buffer_init(&m); | |
1148 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1149 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1150 | ||
1151 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1152 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1153 | &m); | |
1154 | ||
1155 | major = buffer_get_int(&m); | |
1156 | buffer_free(&m); | |
1157 | return(major); | |
1158 | } | |
1159 | ||
7364bd04 | 1160 | int |
1161 | mm_ssh_gssapi_userok(char *user) | |
1162 | { | |
1163 | Buffer m; | |
1164 | int authenticated = 0; | |
1165 | ||
1166 | buffer_init(&m); | |
1167 | ||
1168 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1169 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1170 | &m); | |
1171 | ||
1172 | authenticated = buffer_get_int(&m); | |
1173 | ||
1174 | buffer_free(&m); | |
1175 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1176 | return (authenticated); | |
1177 | } | |
1178 | #endif /* GSSAPI */ |