]>
Commit | Line | Data |
---|---|---|
cf851879 | 1 | /* $OpenBSD: monitor_wrap.c,v 1.49 2006/08/01 23:22:47 stevesk Exp $ */ |
1853d1ef | 2 | /* |
3 | * Copyright 2002 Niels Provos <provos@citi.umich.edu> | |
4 | * Copyright 2002 Markus Friedl <markus@openbsd.org> | |
5 | * All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * 1. Redistributions of source code must retain the above copyright | |
11 | * notice, this list of conditions and the following disclaimer. | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * | |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 | */ | |
27 | ||
28 | #include "includes.h" | |
1853d1ef | 29 | |
b1842393 | 30 | #include <sys/types.h> |
31 | ||
1853d1ef | 32 | #include <openssl/bn.h> |
33 | #include <openssl/dh.h> | |
34 | ||
028094f4 | 35 | #include <errno.h> |
b1842393 | 36 | #include <pwd.h> |
cf851879 | 37 | #include <stdio.h> |
00146caa | 38 | #include <string.h> |
b1842393 | 39 | |
1853d1ef | 40 | #include "ssh.h" |
41 | #include "dh.h" | |
42 | #include "kex.h" | |
43 | #include "auth.h" | |
92e15201 | 44 | #include "auth-options.h" |
1853d1ef | 45 | #include "buffer.h" |
46 | #include "bufaux.h" | |
47 | #include "packet.h" | |
48 | #include "mac.h" | |
49 | #include "log.h" | |
a655c012 | 50 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
51 | #undef TARGET_OS_MAC | |
9b08c23f | 52 | #include "zlib.h" |
a655c012 | 53 | #define TARGET_OS_MAC 1 |
54 | #else | |
55 | #include "zlib.h" | |
56 | #endif | |
1853d1ef | 57 | #include "monitor.h" |
58 | #include "monitor_wrap.h" | |
59 | #include "xmalloc.h" | |
60 | #include "atomicio.h" | |
61 | #include "monitor_fdpass.h" | |
51e7a012 | 62 | #include "misc.h" |
7fceb20d | 63 | #include "servconf.h" |
1853d1ef | 64 | |
65 | #include "auth.h" | |
66 | #include "channels.h" | |
67 | #include "session.h" | |
68 | ||
7364bd04 | 69 | #ifdef GSSAPI |
70 | #include "ssh-gss.h" | |
71 | #endif | |
72 | ||
1853d1ef | 73 | /* Imports */ |
74 | extern int compat20; | |
75 | extern Newkeys *newkeys[]; | |
76 | extern z_stream incoming_stream; | |
77 | extern z_stream outgoing_stream; | |
b5a28cbc | 78 | extern struct monitor *pmonitor; |
1853d1ef | 79 | extern Buffer input, output; |
be2ca0c9 | 80 | extern Buffer loginmsg; |
7fceb20d | 81 | extern ServerOptions options; |
1853d1ef | 82 | |
2362db19 | 83 | int |
84 | mm_is_monitor(void) | |
85 | { | |
86 | /* | |
87 | * m_pid is only set in the privileged part, and | |
88 | * points to the unprivileged child. | |
89 | */ | |
74677ba3 | 90 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 91 | } |
92 | ||
1853d1ef | 93 | void |
ca75d7de | 94 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 95 | { |
1853d1ef | 96 | u_int mlen = buffer_len(m); |
405a0d43 | 97 | u_char buf[5]; |
1853d1ef | 98 | |
1588c277 | 99 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 100 | |
51e7a012 | 101 | put_u32(buf, mlen + 1); |
7203d6bb | 102 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
ca75d7de | 103 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
05624c18 | 104 | fatal("%s: write: %s", __func__, strerror(errno)); |
ca75d7de | 105 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
05624c18 | 106 | fatal("%s: write: %s", __func__, strerror(errno)); |
1853d1ef | 107 | } |
108 | ||
109 | void | |
ca75d7de | 110 | mm_request_receive(int sock, Buffer *m) |
1853d1ef | 111 | { |
112 | u_char buf[4]; | |
1853d1ef | 113 | u_int msg_len; |
114 | ||
1588c277 | 115 | debug3("%s entering", __func__); |
1853d1ef | 116 | |
05624c18 | 117 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
118 | if (errno == EPIPE) | |
2362db19 | 119 | cleanup_exit(255); |
05624c18 | 120 | fatal("%s: read: %s", __func__, strerror(errno)); |
1853d1ef | 121 | } |
51e7a012 | 122 | msg_len = get_u32(buf); |
1853d1ef | 123 | if (msg_len > 256 * 1024) |
1588c277 | 124 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 125 | buffer_clear(m); |
126 | buffer_append_space(m, msg_len); | |
05624c18 | 127 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
128 | fatal("%s: read: %s", __func__, strerror(errno)); | |
1853d1ef | 129 | } |
130 | ||
131 | void | |
ca75d7de | 132 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 133 | { |
134 | u_char rtype; | |
135 | ||
1588c277 | 136 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 137 | |
ca75d7de | 138 | mm_request_receive(sock, m); |
1853d1ef | 139 | rtype = buffer_get_char(m); |
140 | if (rtype != type) | |
1588c277 | 141 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 142 | rtype, type); |
143 | } | |
144 | ||
145 | DH * | |
146 | mm_choose_dh(int min, int nbits, int max) | |
147 | { | |
148 | BIGNUM *p, *g; | |
149 | int success = 0; | |
150 | Buffer m; | |
151 | ||
152 | buffer_init(&m); | |
153 | buffer_put_int(&m, min); | |
154 | buffer_put_int(&m, nbits); | |
155 | buffer_put_int(&m, max); | |
156 | ||
b5a28cbc | 157 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 158 | |
1588c277 | 159 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 160 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 161 | |
162 | success = buffer_get_char(&m); | |
163 | if (success == 0) | |
1588c277 | 164 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 165 | |
166 | if ((p = BN_new()) == NULL) | |
1588c277 | 167 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 168 | if ((g = BN_new()) == NULL) |
1588c277 | 169 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 170 | buffer_get_bignum2(&m, p); |
171 | buffer_get_bignum2(&m, g); | |
172 | ||
1588c277 | 173 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 174 | buffer_free(&m); |
175 | ||
176 | return (dh_new_group(g, p)); | |
177 | } | |
178 | ||
179 | int | |
180 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
181 | { | |
b5a28cbc | 182 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 183 | Buffer m; |
184 | ||
1588c277 | 185 | debug3("%s entering", __func__); |
1853d1ef | 186 | |
187 | buffer_init(&m); | |
188 | buffer_put_int(&m, kex->host_key_index(key)); | |
189 | buffer_put_string(&m, data, datalen); | |
190 | ||
b5a28cbc | 191 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 192 | |
1588c277 | 193 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 194 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 195 | *sigp = buffer_get_string(&m, lenp); |
196 | buffer_free(&m); | |
197 | ||
198 | return (0); | |
199 | } | |
200 | ||
201 | struct passwd * | |
18a8f313 | 202 | mm_getpwnamallow(const char *username) |
1853d1ef | 203 | { |
204 | Buffer m; | |
205 | struct passwd *pw; | |
206 | u_int pwlen; | |
207 | ||
1588c277 | 208 | debug3("%s entering", __func__); |
1853d1ef | 209 | |
210 | buffer_init(&m); | |
18a8f313 | 211 | buffer_put_cstring(&m, username); |
1853d1ef | 212 | |
b5a28cbc | 213 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 214 | |
1588c277 | 215 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 216 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 217 | |
218 | if (buffer_get_char(&m) == 0) { | |
219 | buffer_free(&m); | |
220 | return (NULL); | |
221 | } | |
222 | pw = buffer_get_string(&m, &pwlen); | |
223 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 224 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 225 | pw->pw_name = buffer_get_string(&m, NULL); |
226 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
227 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 228 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 229 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 230 | #endif |
1853d1ef | 231 | pw->pw_dir = buffer_get_string(&m, NULL); |
232 | pw->pw_shell = buffer_get_string(&m, NULL); | |
233 | buffer_free(&m); | |
234 | ||
235 | return (pw); | |
236 | } | |
237 | ||
02cd6c56 | 238 | char * |
239 | mm_auth2_read_banner(void) | |
94a73cdc | 240 | { |
241 | Buffer m; | |
242 | char *banner; | |
243 | ||
1588c277 | 244 | debug3("%s entering", __func__); |
94a73cdc | 245 | |
246 | buffer_init(&m); | |
b5a28cbc | 247 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 248 | buffer_clear(&m); |
249 | ||
02cd6c56 | 250 | mm_request_receive_expect(pmonitor->m_recvfd, |
251 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 252 | banner = buffer_get_string(&m, NULL); |
253 | buffer_free(&m); | |
7203d6bb | 254 | |
02cd6c56 | 255 | /* treat empty banner as missing banner */ |
256 | if (strlen(banner) == 0) { | |
257 | xfree(banner); | |
258 | banner = NULL; | |
259 | } | |
94a73cdc | 260 | return (banner); |
261 | } | |
262 | ||
1853d1ef | 263 | /* Inform the privileged process about service and style */ |
264 | ||
265 | void | |
266 | mm_inform_authserv(char *service, char *style) | |
267 | { | |
268 | Buffer m; | |
269 | ||
1588c277 | 270 | debug3("%s entering", __func__); |
1853d1ef | 271 | |
272 | buffer_init(&m); | |
273 | buffer_put_cstring(&m, service); | |
274 | buffer_put_cstring(&m, style ? style : ""); | |
275 | ||
b5a28cbc | 276 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 277 | |
278 | buffer_free(&m); | |
279 | } | |
280 | ||
281 | /* Do the password authentication */ | |
282 | int | |
283 | mm_auth_password(Authctxt *authctxt, char *password) | |
284 | { | |
285 | Buffer m; | |
286 | int authenticated = 0; | |
287 | ||
1588c277 | 288 | debug3("%s entering", __func__); |
1853d1ef | 289 | |
290 | buffer_init(&m); | |
291 | buffer_put_cstring(&m, password); | |
b5a28cbc | 292 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 293 | |
1588c277 | 294 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 295 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 296 | |
297 | authenticated = buffer_get_int(&m); | |
298 | ||
299 | buffer_free(&m); | |
300 | ||
301 | debug3("%s: user %sauthenticated", | |
1588c277 | 302 | __func__, authenticated ? "" : "not "); |
1853d1ef | 303 | return (authenticated); |
304 | } | |
305 | ||
306 | int | |
307 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
308 | { | |
309 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
310 | } | |
311 | ||
312 | int | |
313 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
314 | Key *key) | |
315 | { | |
316 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
317 | } | |
318 | ||
319 | int | |
320 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
321 | char *host, Key *key) | |
322 | { | |
323 | int ret; | |
324 | ||
325 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
326 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
327 | key->type = KEY_RSA1; | |
328 | return (ret); | |
329 | } | |
330 | ||
331 | static void | |
332 | mm_send_debug(Buffer *m) | |
333 | { | |
334 | char *msg; | |
335 | ||
336 | while (buffer_len(m)) { | |
337 | msg = buffer_get_string(m, NULL); | |
1588c277 | 338 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 339 | packet_send_debug("%s", msg); |
340 | xfree(msg); | |
341 | } | |
342 | } | |
343 | ||
344 | int | |
345 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
346 | { | |
347 | Buffer m; | |
348 | u_char *blob; | |
349 | u_int len; | |
92e15201 | 350 | int allowed = 0, have_forced = 0; |
1853d1ef | 351 | |
1588c277 | 352 | debug3("%s entering", __func__); |
1853d1ef | 353 | |
354 | /* Convert the key to a blob and the pass it over */ | |
355 | if (!key_to_blob(key, &blob, &len)) | |
356 | return (0); | |
357 | ||
358 | buffer_init(&m); | |
359 | buffer_put_int(&m, type); | |
360 | buffer_put_cstring(&m, user ? user : ""); | |
361 | buffer_put_cstring(&m, host ? host : ""); | |
362 | buffer_put_string(&m, blob, len); | |
363 | xfree(blob); | |
364 | ||
b5a28cbc | 365 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 366 | |
1588c277 | 367 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 368 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 369 | |
370 | allowed = buffer_get_int(&m); | |
371 | ||
92e15201 | 372 | /* fake forced command */ |
373 | auth_clear_options(); | |
374 | have_forced = buffer_get_int(&m); | |
375 | forced_command = have_forced ? xstrdup("true") : NULL; | |
376 | ||
1853d1ef | 377 | /* Send potential debug messages */ |
378 | mm_send_debug(&m); | |
379 | ||
380 | buffer_free(&m); | |
381 | ||
382 | return (allowed); | |
383 | } | |
384 | ||
385 | /* | |
386 | * This key verify needs to send the key type along, because the | |
387 | * privileged parent makes the decision if the key is allowed | |
388 | * for authentication. | |
389 | */ | |
390 | ||
391 | int | |
392 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
393 | { | |
394 | Buffer m; | |
395 | u_char *blob; | |
396 | u_int len; | |
397 | int verified = 0; | |
398 | ||
1588c277 | 399 | debug3("%s entering", __func__); |
1853d1ef | 400 | |
401 | /* Convert the key to a blob and the pass it over */ | |
402 | if (!key_to_blob(key, &blob, &len)) | |
403 | return (0); | |
404 | ||
405 | buffer_init(&m); | |
406 | buffer_put_string(&m, blob, len); | |
407 | buffer_put_string(&m, sig, siglen); | |
408 | buffer_put_string(&m, data, datalen); | |
409 | xfree(blob); | |
410 | ||
b5a28cbc | 411 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 412 | |
1588c277 | 413 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 414 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 415 | |
416 | verified = buffer_get_int(&m); | |
417 | ||
418 | buffer_free(&m); | |
419 | ||
420 | return (verified); | |
421 | } | |
422 | ||
423 | /* Export key state after authentication */ | |
424 | Newkeys * | |
425 | mm_newkeys_from_blob(u_char *blob, int blen) | |
426 | { | |
427 | Buffer b; | |
428 | u_int len; | |
429 | Newkeys *newkey = NULL; | |
430 | Enc *enc; | |
431 | Mac *mac; | |
432 | Comp *comp; | |
433 | ||
1588c277 | 434 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 435 | #ifdef DEBUG_PK |
436 | dump_base64(stderr, blob, blen); | |
437 | #endif | |
438 | buffer_init(&b); | |
439 | buffer_append(&b, blob, blen); | |
440 | ||
441 | newkey = xmalloc(sizeof(*newkey)); | |
442 | enc = &newkey->enc; | |
443 | mac = &newkey->mac; | |
444 | comp = &newkey->comp; | |
445 | ||
446 | /* Enc structure */ | |
447 | enc->name = buffer_get_string(&b, NULL); | |
448 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
449 | enc->enabled = buffer_get_int(&b); | |
450 | enc->block_size = buffer_get_int(&b); | |
451 | enc->key = buffer_get_string(&b, &enc->key_len); | |
452 | enc->iv = buffer_get_string(&b, &len); | |
453 | if (len != enc->block_size) | |
bb0640b2 | 454 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 455 | enc->block_size, len); |
456 | ||
457 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 458 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 459 | enc->name, enc->cipher); |
460 | ||
461 | /* Mac structure */ | |
462 | mac->name = buffer_get_string(&b, NULL); | |
463 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 464 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 465 | mac->enabled = buffer_get_int(&b); |
466 | mac->key = buffer_get_string(&b, &len); | |
467 | if (len > mac->key_len) | |
bb0640b2 | 468 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 469 | mac->key_len); |
470 | mac->key_len = len; | |
471 | ||
472 | /* Comp structure */ | |
473 | comp->type = buffer_get_int(&b); | |
474 | comp->enabled = buffer_get_int(&b); | |
475 | comp->name = buffer_get_string(&b, NULL); | |
476 | ||
477 | len = buffer_len(&b); | |
478 | if (len != 0) | |
bb0640b2 | 479 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 480 | buffer_free(&b); |
481 | return (newkey); | |
482 | } | |
483 | ||
484 | int | |
485 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
486 | { | |
487 | Buffer b; | |
488 | int len; | |
1853d1ef | 489 | Enc *enc; |
490 | Mac *mac; | |
491 | Comp *comp; | |
492 | Newkeys *newkey = newkeys[mode]; | |
493 | ||
1588c277 | 494 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 495 | |
496 | if (newkey == NULL) { | |
1588c277 | 497 | error("%s: newkey == NULL", __func__); |
1853d1ef | 498 | return 0; |
499 | } | |
500 | enc = &newkey->enc; | |
501 | mac = &newkey->mac; | |
502 | comp = &newkey->comp; | |
503 | ||
504 | buffer_init(&b); | |
505 | /* Enc structure */ | |
506 | buffer_put_cstring(&b, enc->name); | |
507 | /* The cipher struct is constant and shared, you export pointer */ | |
508 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
509 | buffer_put_int(&b, enc->enabled); | |
510 | buffer_put_int(&b, enc->block_size); | |
511 | buffer_put_string(&b, enc->key, enc->key_len); | |
512 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
513 | buffer_put_string(&b, enc->iv, enc->block_size); | |
514 | ||
515 | /* Mac structure */ | |
516 | buffer_put_cstring(&b, mac->name); | |
517 | buffer_put_int(&b, mac->enabled); | |
518 | buffer_put_string(&b, mac->key, mac->key_len); | |
519 | ||
520 | /* Comp structure */ | |
521 | buffer_put_int(&b, comp->type); | |
522 | buffer_put_int(&b, comp->enabled); | |
523 | buffer_put_cstring(&b, comp->name); | |
524 | ||
525 | len = buffer_len(&b); | |
1853d1ef | 526 | if (lenp != NULL) |
527 | *lenp = len; | |
eb9f2fab | 528 | if (blobp != NULL) { |
529 | *blobp = xmalloc(len); | |
530 | memcpy(*blobp, buffer_ptr(&b), len); | |
531 | } | |
532 | memset(buffer_ptr(&b), 0, len); | |
533 | buffer_free(&b); | |
1853d1ef | 534 | return len; |
535 | } | |
536 | ||
537 | static void | |
538 | mm_send_kex(Buffer *m, Kex *kex) | |
539 | { | |
540 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
541 | buffer_put_int(m, kex->we_need); | |
542 | buffer_put_int(m, kex->hostkey_type); | |
543 | buffer_put_int(m, kex->kex_type); | |
544 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
545 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
546 | buffer_put_int(m, kex->flags); | |
547 | buffer_put_cstring(m, kex->client_version_string); | |
548 | buffer_put_cstring(m, kex->server_version_string); | |
549 | } | |
550 | ||
551 | void | |
ca75d7de | 552 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 553 | { |
554 | Buffer m; | |
555 | u_char *blob, *p; | |
556 | u_int bloblen, plen; | |
ffd7b36b | 557 | u_int32_t seqnr, packets; |
558 | u_int64_t blocks; | |
1853d1ef | 559 | |
560 | buffer_init(&m); | |
561 | ||
562 | if (!compat20) { | |
563 | u_char iv[24]; | |
9459414c | 564 | u_char *key; |
565 | u_int ivlen, keylen; | |
1853d1ef | 566 | |
567 | buffer_put_int(&m, packet_get_protocol_flags()); | |
568 | ||
569 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
570 | ||
9459414c | 571 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
572 | keylen = packet_get_encryption_key(NULL); | |
573 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
574 | keylen = packet_get_encryption_key(key); | |
575 | buffer_put_string(&m, key, keylen); | |
576 | memset(key, 0, keylen); | |
577 | xfree(key); | |
578 | ||
1853d1ef | 579 | ivlen = packet_get_keyiv_len(MODE_OUT); |
580 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
581 | buffer_put_string(&m, iv, ivlen); | |
582 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
583 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
584 | buffer_put_string(&m, iv, ivlen); | |
585 | goto skip; | |
586 | } else { | |
587 | /* Kex for rekeying */ | |
ca75d7de | 588 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 589 | } |
590 | ||
591 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 592 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 593 | |
594 | /* Keys from Kex */ | |
595 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 596 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 597 | |
598 | buffer_put_string(&m, blob, bloblen); | |
599 | xfree(blob); | |
600 | ||
601 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 602 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 603 | |
604 | buffer_put_string(&m, blob, bloblen); | |
605 | xfree(blob); | |
606 | ||
ffd7b36b | 607 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
608 | buffer_put_int(&m, seqnr); | |
609 | buffer_put_int64(&m, blocks); | |
610 | buffer_put_int(&m, packets); | |
806e4c11 | 611 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 612 | buffer_put_int(&m, seqnr); |
613 | buffer_put_int64(&m, blocks); | |
614 | buffer_put_int(&m, packets); | |
1853d1ef | 615 | |
1588c277 | 616 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 617 | skip: |
618 | /* More key context */ | |
619 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
620 | p = xmalloc(plen+1); | |
621 | packet_get_keycontext(MODE_OUT, p); | |
622 | buffer_put_string(&m, p, plen); | |
623 | xfree(p); | |
624 | ||
625 | plen = packet_get_keycontext(MODE_IN, NULL); | |
626 | p = xmalloc(plen+1); | |
627 | packet_get_keycontext(MODE_IN, p); | |
628 | buffer_put_string(&m, p, plen); | |
629 | xfree(p); | |
630 | ||
631 | /* Compression state */ | |
1588c277 | 632 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 633 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
634 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
635 | ||
636 | /* Network I/O buffers */ | |
637 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
638 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
639 | ||
ca75d7de | 640 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 641 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 642 | |
643 | buffer_free(&m); | |
644 | } | |
645 | ||
646 | int | |
148de80c | 647 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
1853d1ef | 648 | { |
649 | Buffer m; | |
be2ca0c9 | 650 | char *p, *msg; |
1853d1ef | 651 | int success = 0; |
652 | ||
653 | buffer_init(&m); | |
b5a28cbc | 654 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 655 | |
1588c277 | 656 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 657 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 658 | |
659 | success = buffer_get_int(&m); | |
660 | if (success == 0) { | |
1588c277 | 661 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 662 | buffer_free(&m); |
663 | return (0); | |
664 | } | |
665 | p = buffer_get_string(&m, NULL); | |
be2ca0c9 | 666 | msg = buffer_get_string(&m, NULL); |
1853d1ef | 667 | buffer_free(&m); |
668 | ||
669 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
670 | xfree(p); | |
671 | ||
be2ca0c9 | 672 | buffer_append(&loginmsg, msg, strlen(msg)); |
673 | xfree(msg); | |
674 | ||
b5a28cbc | 675 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
676 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 677 | |
678 | /* Success */ | |
679 | return (1); | |
680 | } | |
681 | ||
682 | void | |
2362db19 | 683 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 684 | { |
1853d1ef | 685 | Buffer m; |
686 | ||
687 | if (s->ttyfd == -1) | |
688 | return; | |
689 | buffer_init(&m); | |
690 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 691 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 692 | buffer_free(&m); |
693 | ||
694 | /* closed dup'ed master */ | |
695 | if (close(s->ptymaster) < 0) | |
696 | error("close(s->ptymaster): %s", strerror(errno)); | |
697 | ||
698 | /* unlink pty from session */ | |
699 | s->ttyfd = -1; | |
700 | } | |
701 | ||
ad200abb | 702 | #ifdef USE_PAM |
703 | void | |
529d73ab | 704 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 705 | { |
706 | Buffer m; | |
707 | ||
1588c277 | 708 | debug3("%s entering", __func__); |
7fceb20d | 709 | if (!options.use_pam) |
710 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 711 | |
712 | buffer_init(&m); | |
b5a28cbc | 713 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 714 | |
715 | buffer_free(&m); | |
716 | } | |
05114c74 | 717 | |
5b9e2464 | 718 | u_int |
719 | mm_do_pam_account(void) | |
720 | { | |
721 | Buffer m; | |
722 | u_int ret; | |
ba6dd90e | 723 | char *msg; |
5b9e2464 | 724 | |
725 | debug3("%s entering", __func__); | |
726 | if (!options.use_pam) | |
727 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
728 | ||
729 | buffer_init(&m); | |
730 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
731 | ||
aff51935 | 732 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 733 | MONITOR_ANS_PAM_ACCOUNT, &m); |
734 | ret = buffer_get_int(&m); | |
ba6dd90e | 735 | msg = buffer_get_string(&m, NULL); |
736 | buffer_append(&loginmsg, msg, strlen(msg)); | |
737 | xfree(msg); | |
5b9e2464 | 738 | |
739 | buffer_free(&m); | |
b6453d99 | 740 | |
5b9e2464 | 741 | debug3("%s returning %d", __func__, ret); |
742 | ||
743 | return (ret); | |
744 | } | |
745 | ||
05114c74 | 746 | void * |
747 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
748 | { | |
749 | Buffer m; | |
750 | int success; | |
751 | ||
752 | debug3("%s", __func__); | |
753 | buffer_init(&m); | |
754 | buffer_put_cstring(&m, authctxt->user); | |
755 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
756 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
757 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
758 | success = buffer_get_int(&m); | |
759 | if (success == 0) { | |
760 | debug3("%s: pam_init_ctx failed", __func__); | |
761 | buffer_free(&m); | |
762 | return (NULL); | |
763 | } | |
764 | buffer_free(&m); | |
765 | return (authctxt); | |
766 | } | |
767 | ||
768 | int | |
769 | mm_sshpam_query(void *ctx, char **name, char **info, | |
770 | u_int *num, char ***prompts, u_int **echo_on) | |
771 | { | |
772 | Buffer m; | |
a1a073cc | 773 | u_int i; |
774 | int ret; | |
05114c74 | 775 | |
776 | debug3("%s", __func__); | |
777 | buffer_init(&m); | |
778 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
779 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
780 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
781 | ret = buffer_get_int(&m); | |
782 | debug3("%s: pam_query returned %d", __func__, ret); | |
783 | *name = buffer_get_string(&m, NULL); | |
784 | *info = buffer_get_string(&m, NULL); | |
785 | *num = buffer_get_int(&m); | |
01d35895 | 786 | if (*num > PAM_MAX_NUM_MSG) |
787 | fatal("%s: recieved %u PAM messages, expected <= %u", | |
788 | __func__, *num, PAM_MAX_NUM_MSG); | |
789 | *prompts = xcalloc((*num + 1), sizeof(char *)); | |
790 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); | |
05114c74 | 791 | for (i = 0; i < *num; ++i) { |
792 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
793 | (*echo_on)[i] = buffer_get_int(&m); | |
794 | } | |
795 | buffer_free(&m); | |
796 | return (ret); | |
797 | } | |
798 | ||
799 | int | |
800 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
801 | { | |
802 | Buffer m; | |
a1a073cc | 803 | u_int i; |
804 | int ret; | |
05114c74 | 805 | |
806 | debug3("%s", __func__); | |
807 | buffer_init(&m); | |
808 | buffer_put_int(&m, num); | |
809 | for (i = 0; i < num; ++i) | |
810 | buffer_put_cstring(&m, resp[i]); | |
811 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
812 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
813 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
814 | ret = buffer_get_int(&m); | |
815 | debug3("%s: pam_respond returned %d", __func__, ret); | |
816 | buffer_free(&m); | |
817 | return (ret); | |
818 | } | |
819 | ||
820 | void | |
821 | mm_sshpam_free_ctx(void *ctxtp) | |
822 | { | |
823 | Buffer m; | |
824 | ||
825 | debug3("%s", __func__); | |
826 | buffer_init(&m); | |
827 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
828 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
829 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
830 | buffer_free(&m); | |
831 | } | |
ad200abb | 832 | #endif /* USE_PAM */ |
833 | ||
1853d1ef | 834 | /* Request process termination */ |
835 | ||
836 | void | |
837 | mm_terminate(void) | |
838 | { | |
839 | Buffer m; | |
840 | ||
841 | buffer_init(&m); | |
b5a28cbc | 842 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 843 | buffer_free(&m); |
844 | } | |
845 | ||
846 | int | |
847 | mm_ssh1_session_key(BIGNUM *num) | |
848 | { | |
849 | int rsafail; | |
850 | Buffer m; | |
851 | ||
852 | buffer_init(&m); | |
853 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 854 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 855 | |
b5a28cbc | 856 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 857 | |
858 | rsafail = buffer_get_int(&m); | |
859 | buffer_get_bignum2(&m, num); | |
860 | ||
861 | buffer_free(&m); | |
862 | ||
863 | return (rsafail); | |
864 | } | |
865 | ||
866 | static void | |
867 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
868 | char ***prompts, u_int **echo_on) | |
869 | { | |
7203d6bb | 870 | *name = xstrdup(""); |
871 | *infotxt = xstrdup(""); | |
1853d1ef | 872 | *numprompts = 1; |
52e3daed | 873 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
874 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
1853d1ef | 875 | (*echo_on)[0] = 0; |
876 | } | |
877 | ||
878 | int | |
879 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
880 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
881 | { | |
882 | Buffer m; | |
6d6c25e3 | 883 | u_int success; |
1853d1ef | 884 | char *challenge; |
885 | ||
1588c277 | 886 | debug3("%s: entering", __func__); |
1853d1ef | 887 | |
888 | buffer_init(&m); | |
b5a28cbc | 889 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 890 | |
b5a28cbc | 891 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 892 | &m); |
6d6c25e3 | 893 | success = buffer_get_int(&m); |
894 | if (success == 0) { | |
1588c277 | 895 | debug3("%s: no challenge", __func__); |
1853d1ef | 896 | buffer_free(&m); |
897 | return (-1); | |
898 | } | |
899 | ||
900 | /* Get the challenge, and format the response */ | |
901 | challenge = buffer_get_string(&m, NULL); | |
902 | buffer_free(&m); | |
903 | ||
904 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
905 | (*prompts)[0] = challenge; | |
906 | ||
1588c277 | 907 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 908 | |
909 | return (0); | |
910 | } | |
911 | ||
912 | int | |
913 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
914 | { | |
915 | Buffer m; | |
916 | int authok; | |
917 | ||
1588c277 | 918 | debug3("%s: entering", __func__); |
1853d1ef | 919 | if (numresponses != 1) |
920 | return (-1); | |
921 | ||
922 | buffer_init(&m); | |
923 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 924 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 925 | |
b5a28cbc | 926 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 927 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
928 | ||
929 | authok = buffer_get_int(&m); | |
930 | buffer_free(&m); | |
931 | ||
932 | return ((authok == 0) ? -1 : 0); | |
933 | } | |
934 | ||
77751377 | 935 | #ifdef SKEY |
1853d1ef | 936 | int |
937 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
938 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
939 | { | |
940 | Buffer m; | |
6d6c25e3 | 941 | int len; |
942 | u_int success; | |
1853d1ef | 943 | char *p, *challenge; |
944 | ||
1588c277 | 945 | debug3("%s: entering", __func__); |
1853d1ef | 946 | |
947 | buffer_init(&m); | |
b5a28cbc | 948 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 949 | |
b5a28cbc | 950 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 951 | &m); |
6d6c25e3 | 952 | success = buffer_get_int(&m); |
953 | if (success == 0) { | |
1588c277 | 954 | debug3("%s: no challenge", __func__); |
1853d1ef | 955 | buffer_free(&m); |
956 | return (-1); | |
957 | } | |
958 | ||
959 | /* Get the challenge, and format the response */ | |
960 | challenge = buffer_get_string(&m, NULL); | |
961 | buffer_free(&m); | |
962 | ||
1588c277 | 963 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 964 | |
965 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
966 | ||
52e3daed | 967 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
1853d1ef | 968 | xfree(challenge); |
969 | ||
970 | return (0); | |
971 | } | |
972 | ||
973 | int | |
974 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
975 | { | |
976 | Buffer m; | |
977 | int authok; | |
978 | ||
1588c277 | 979 | debug3("%s: entering", __func__); |
1853d1ef | 980 | if (numresponses != 1) |
981 | return (-1); | |
982 | ||
983 | buffer_init(&m); | |
984 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 985 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 986 | |
b5a28cbc | 987 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 988 | MONITOR_ANS_SKEYRESPOND, &m); |
989 | ||
990 | authok = buffer_get_int(&m); | |
991 | buffer_free(&m); | |
992 | ||
993 | return ((authok == 0) ? -1 : 0); | |
994 | } | |
77751377 | 995 | #endif /* SKEY */ |
1853d1ef | 996 | |
997 | void | |
998 | mm_ssh1_session_id(u_char session_id[16]) | |
999 | { | |
1000 | Buffer m; | |
1001 | int i; | |
1002 | ||
1588c277 | 1003 | debug3("%s entering", __func__); |
1853d1ef | 1004 | |
1005 | buffer_init(&m); | |
1006 | for (i = 0; i < 16; i++) | |
1007 | buffer_put_char(&m, session_id[i]); | |
1008 | ||
b5a28cbc | 1009 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 1010 | buffer_free(&m); |
1011 | } | |
1012 | ||
1013 | int | |
1014 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1015 | { | |
1016 | Buffer m; | |
1017 | Key *key; | |
1018 | u_char *blob; | |
1019 | u_int blen; | |
92e15201 | 1020 | int allowed = 0, have_forced = 0; |
1853d1ef | 1021 | |
1588c277 | 1022 | debug3("%s entering", __func__); |
1853d1ef | 1023 | |
1024 | buffer_init(&m); | |
1025 | buffer_put_bignum2(&m, client_n); | |
1026 | ||
b5a28cbc | 1027 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1028 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1029 | |
1030 | allowed = buffer_get_int(&m); | |
1031 | ||
92e15201 | 1032 | /* fake forced command */ |
1033 | auth_clear_options(); | |
1034 | have_forced = buffer_get_int(&m); | |
1035 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1036 | ||
1853d1ef | 1037 | if (allowed && rkey != NULL) { |
1038 | blob = buffer_get_string(&m, &blen); | |
1039 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1040 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1041 | *rkey = key; |
1042 | xfree(blob); | |
1043 | } | |
1044 | mm_send_debug(&m); | |
1045 | buffer_free(&m); | |
1046 | ||
1047 | return (allowed); | |
1048 | } | |
1049 | ||
1050 | BIGNUM * | |
1051 | mm_auth_rsa_generate_challenge(Key *key) | |
1052 | { | |
1053 | Buffer m; | |
1054 | BIGNUM *challenge; | |
1055 | u_char *blob; | |
1056 | u_int blen; | |
1057 | ||
1588c277 | 1058 | debug3("%s entering", __func__); |
1853d1ef | 1059 | |
1060 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1061 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1062 | |
1063 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1064 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1065 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1066 | key->type = KEY_RSA1; |
1067 | ||
1068 | buffer_init(&m); | |
1069 | buffer_put_string(&m, blob, blen); | |
1070 | xfree(blob); | |
1071 | ||
b5a28cbc | 1072 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1073 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1074 | |
1075 | buffer_get_bignum2(&m, challenge); | |
1076 | buffer_free(&m); | |
1077 | ||
1078 | return (challenge); | |
1079 | } | |
1080 | ||
1081 | int | |
1082 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1083 | { | |
1084 | Buffer m; | |
1085 | u_char *blob; | |
1086 | u_int blen; | |
1087 | int success = 0; | |
1088 | ||
1588c277 | 1089 | debug3("%s entering", __func__); |
1853d1ef | 1090 | |
1091 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1092 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1093 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1094 | key->type = KEY_RSA1; |
1095 | ||
1096 | buffer_init(&m); | |
1097 | buffer_put_string(&m, blob, blen); | |
1098 | buffer_put_string(&m, response, 16); | |
1099 | xfree(blob); | |
1100 | ||
b5a28cbc | 1101 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1102 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1103 | |
1104 | success = buffer_get_int(&m); | |
1105 | buffer_free(&m); | |
1106 | ||
1107 | return (success); | |
1108 | } | |
696f6bef | 1109 | |
6039eeef | 1110 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 1111 | void |
1112 | mm_audit_event(ssh_audit_event_t event) | |
1113 | { | |
1114 | Buffer m; | |
1115 | ||
1116 | debug3("%s entering", __func__); | |
1117 | ||
1118 | buffer_init(&m); | |
1119 | buffer_put_int(&m, event); | |
1120 | ||
1121 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1122 | buffer_free(&m); | |
1123 | } | |
1124 | ||
1125 | void | |
1126 | mm_audit_run_command(const char *command) | |
1127 | { | |
1128 | Buffer m; | |
1129 | ||
1130 | debug3("%s entering command %s", __func__, command); | |
1131 | ||
1132 | buffer_init(&m); | |
1133 | buffer_put_cstring(&m, command); | |
1134 | ||
1135 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1136 | buffer_free(&m); | |
1137 | } | |
6039eeef | 1138 | #endif /* SSH_AUDIT_EVENTS */ |
c00e4d75 | 1139 | |
7364bd04 | 1140 | #ifdef GSSAPI |
1141 | OM_uint32 | |
ca75d7de | 1142 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1143 | { |
1144 | Buffer m; | |
1145 | OM_uint32 major; | |
1146 | ||
1147 | /* Client doesn't get to see the context */ | |
1148 | *ctx = NULL; | |
1149 | ||
1150 | buffer_init(&m); | |
ca75d7de | 1151 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1152 | |
1153 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1154 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1155 | ||
1156 | major = buffer_get_int(&m); | |
1157 | ||
1158 | buffer_free(&m); | |
1159 | return (major); | |
1160 | } | |
1161 | ||
1162 | OM_uint32 | |
1163 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1164 | gss_buffer_desc *out, OM_uint32 *flags) | |
1165 | { | |
1166 | Buffer m; | |
1167 | OM_uint32 major; | |
f99e1ca4 | 1168 | u_int len; |
7364bd04 | 1169 | |
1170 | buffer_init(&m); | |
1171 | buffer_put_string(&m, in->value, in->length); | |
1172 | ||
1173 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1174 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1175 | ||
1176 | major = buffer_get_int(&m); | |
f99e1ca4 | 1177 | out->value = buffer_get_string(&m, &len); |
1178 | out->length = len; | |
7364bd04 | 1179 | if (flags) |
1180 | *flags = buffer_get_int(&m); | |
1181 | ||
1182 | buffer_free(&m); | |
1183 | ||
1184 | return (major); | |
1185 | } | |
1186 | ||
0789992b | 1187 | OM_uint32 |
1188 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1189 | { | |
1190 | Buffer m; | |
1191 | OM_uint32 major; | |
1192 | ||
1193 | buffer_init(&m); | |
1194 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1195 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1196 | ||
1197 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1198 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1199 | &m); | |
1200 | ||
1201 | major = buffer_get_int(&m); | |
1202 | buffer_free(&m); | |
1203 | return(major); | |
1204 | } | |
1205 | ||
7364bd04 | 1206 | int |
1207 | mm_ssh_gssapi_userok(char *user) | |
1208 | { | |
1209 | Buffer m; | |
1210 | int authenticated = 0; | |
1211 | ||
1212 | buffer_init(&m); | |
1213 | ||
1214 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1215 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1216 | &m); | |
1217 | ||
1218 | authenticated = buffer_get_int(&m); | |
1219 | ||
1220 | buffer_free(&m); | |
1221 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1222 | return (authenticated); | |
1223 | } | |
1224 | #endif /* GSSAPI */ |