]>
Commit | Line | Data |
---|---|---|
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" | |
1853d1ef | 28 | |
29 | #include <openssl/bn.h> | |
30 | #include <openssl/dh.h> | |
31 | ||
32 | #include "ssh.h" | |
33 | #include "dh.h" | |
34 | #include "kex.h" | |
35 | #include "auth.h" | |
92e15201 | 36 | #include "auth-options.h" |
1853d1ef | 37 | #include "buffer.h" |
38 | #include "bufaux.h" | |
39 | #include "packet.h" | |
40 | #include "mac.h" | |
41 | #include "log.h" | |
a655c012 | 42 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
43 | #undef TARGET_OS_MAC | |
9b08c23f | 44 | #include "zlib.h" |
a655c012 | 45 | #define TARGET_OS_MAC 1 |
46 | #else | |
47 | #include "zlib.h" | |
48 | #endif | |
1853d1ef | 49 | #include "monitor.h" |
50 | #include "monitor_wrap.h" | |
51 | #include "xmalloc.h" | |
52 | #include "atomicio.h" | |
53 | #include "monitor_fdpass.h" | |
54 | #include "getput.h" | |
7fceb20d | 55 | #include "servconf.h" |
1853d1ef | 56 | |
57 | #include "auth.h" | |
58 | #include "channels.h" | |
59 | #include "session.h" | |
60 | ||
7364bd04 | 61 | #ifdef GSSAPI |
62 | #include "ssh-gss.h" | |
63 | #endif | |
64 | ||
1853d1ef | 65 | /* Imports */ |
66 | extern int compat20; | |
67 | extern Newkeys *newkeys[]; | |
68 | extern z_stream incoming_stream; | |
69 | extern z_stream outgoing_stream; | |
b5a28cbc | 70 | extern struct monitor *pmonitor; |
1853d1ef | 71 | extern Buffer input, output; |
be2ca0c9 | 72 | extern Buffer loginmsg; |
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)) |
05624c18 | 96 | fatal("%s: write: %s", __func__, strerror(errno)); |
ca75d7de | 97 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
05624c18 | 98 | fatal("%s: write: %s", __func__, strerror(errno)); |
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; |
106 | ||
1588c277 | 107 | debug3("%s entering", __func__); |
1853d1ef | 108 | |
05624c18 | 109 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
110 | if (errno == EPIPE) | |
2362db19 | 111 | cleanup_exit(255); |
05624c18 | 112 | fatal("%s: read: %s", __func__, strerror(errno)); |
1853d1ef | 113 | } |
114 | msg_len = GET_32BIT(buf); | |
115 | if (msg_len > 256 * 1024) | |
1588c277 | 116 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 117 | buffer_clear(m); |
118 | buffer_append_space(m, msg_len); | |
05624c18 | 119 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
120 | fatal("%s: read: %s", __func__, strerror(errno)); | |
1853d1ef | 121 | } |
122 | ||
123 | void | |
ca75d7de | 124 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 125 | { |
126 | u_char rtype; | |
127 | ||
1588c277 | 128 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 129 | |
ca75d7de | 130 | mm_request_receive(sock, m); |
1853d1ef | 131 | rtype = buffer_get_char(m); |
132 | if (rtype != type) | |
1588c277 | 133 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 134 | rtype, type); |
135 | } | |
136 | ||
137 | DH * | |
138 | mm_choose_dh(int min, int nbits, int max) | |
139 | { | |
140 | BIGNUM *p, *g; | |
141 | int success = 0; | |
142 | Buffer m; | |
143 | ||
144 | buffer_init(&m); | |
145 | buffer_put_int(&m, min); | |
146 | buffer_put_int(&m, nbits); | |
147 | buffer_put_int(&m, max); | |
148 | ||
b5a28cbc | 149 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 150 | |
1588c277 | 151 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 152 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 153 | |
154 | success = buffer_get_char(&m); | |
155 | if (success == 0) | |
1588c277 | 156 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 157 | |
158 | if ((p = BN_new()) == NULL) | |
1588c277 | 159 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 160 | if ((g = BN_new()) == NULL) |
1588c277 | 161 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 162 | buffer_get_bignum2(&m, p); |
163 | buffer_get_bignum2(&m, g); | |
164 | ||
1588c277 | 165 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 166 | buffer_free(&m); |
167 | ||
168 | return (dh_new_group(g, p)); | |
169 | } | |
170 | ||
171 | int | |
172 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
173 | { | |
b5a28cbc | 174 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 175 | Buffer m; |
176 | ||
1588c277 | 177 | debug3("%s entering", __func__); |
1853d1ef | 178 | |
179 | buffer_init(&m); | |
180 | buffer_put_int(&m, kex->host_key_index(key)); | |
181 | buffer_put_string(&m, data, datalen); | |
182 | ||
b5a28cbc | 183 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 184 | |
1588c277 | 185 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 186 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 187 | *sigp = buffer_get_string(&m, lenp); |
188 | buffer_free(&m); | |
189 | ||
190 | return (0); | |
191 | } | |
192 | ||
193 | struct passwd * | |
18a8f313 | 194 | mm_getpwnamallow(const char *username) |
1853d1ef | 195 | { |
196 | Buffer m; | |
197 | struct passwd *pw; | |
198 | u_int pwlen; | |
199 | ||
1588c277 | 200 | debug3("%s entering", __func__); |
1853d1ef | 201 | |
202 | buffer_init(&m); | |
18a8f313 | 203 | buffer_put_cstring(&m, username); |
1853d1ef | 204 | |
b5a28cbc | 205 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 206 | |
1588c277 | 207 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 208 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 209 | |
210 | if (buffer_get_char(&m) == 0) { | |
211 | buffer_free(&m); | |
212 | return (NULL); | |
213 | } | |
214 | pw = buffer_get_string(&m, &pwlen); | |
215 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 216 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 217 | pw->pw_name = buffer_get_string(&m, NULL); |
218 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
219 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 220 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 221 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 222 | #endif |
1853d1ef | 223 | pw->pw_dir = buffer_get_string(&m, NULL); |
224 | pw->pw_shell = buffer_get_string(&m, NULL); | |
225 | buffer_free(&m); | |
226 | ||
227 | return (pw); | |
228 | } | |
229 | ||
02cd6c56 | 230 | char * |
231 | mm_auth2_read_banner(void) | |
94a73cdc | 232 | { |
233 | Buffer m; | |
234 | char *banner; | |
235 | ||
1588c277 | 236 | debug3("%s entering", __func__); |
94a73cdc | 237 | |
238 | buffer_init(&m); | |
b5a28cbc | 239 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 240 | buffer_clear(&m); |
241 | ||
02cd6c56 | 242 | mm_request_receive_expect(pmonitor->m_recvfd, |
243 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 244 | banner = buffer_get_string(&m, NULL); |
245 | buffer_free(&m); | |
7203d6bb | 246 | |
02cd6c56 | 247 | /* treat empty banner as missing banner */ |
248 | if (strlen(banner) == 0) { | |
249 | xfree(banner); | |
250 | banner = NULL; | |
251 | } | |
94a73cdc | 252 | return (banner); |
253 | } | |
254 | ||
1853d1ef | 255 | /* Inform the privileged process about service and style */ |
256 | ||
257 | void | |
258 | mm_inform_authserv(char *service, char *style) | |
259 | { | |
260 | Buffer m; | |
261 | ||
1588c277 | 262 | debug3("%s entering", __func__); |
1853d1ef | 263 | |
264 | buffer_init(&m); | |
265 | buffer_put_cstring(&m, service); | |
266 | buffer_put_cstring(&m, style ? style : ""); | |
267 | ||
b5a28cbc | 268 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 269 | |
270 | buffer_free(&m); | |
271 | } | |
272 | ||
273 | /* Do the password authentication */ | |
274 | int | |
275 | mm_auth_password(Authctxt *authctxt, char *password) | |
276 | { | |
277 | Buffer m; | |
278 | int authenticated = 0; | |
279 | ||
1588c277 | 280 | debug3("%s entering", __func__); |
1853d1ef | 281 | |
282 | buffer_init(&m); | |
283 | buffer_put_cstring(&m, password); | |
b5a28cbc | 284 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 285 | |
1588c277 | 286 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 287 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 288 | |
289 | authenticated = buffer_get_int(&m); | |
290 | ||
291 | buffer_free(&m); | |
292 | ||
293 | debug3("%s: user %sauthenticated", | |
1588c277 | 294 | __func__, authenticated ? "" : "not "); |
1853d1ef | 295 | return (authenticated); |
296 | } | |
297 | ||
298 | int | |
299 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
300 | { | |
301 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
302 | } | |
303 | ||
304 | int | |
305 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
306 | Key *key) | |
307 | { | |
308 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
309 | } | |
310 | ||
311 | int | |
312 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
313 | char *host, Key *key) | |
314 | { | |
315 | int ret; | |
316 | ||
317 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
318 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
319 | key->type = KEY_RSA1; | |
320 | return (ret); | |
321 | } | |
322 | ||
323 | static void | |
324 | mm_send_debug(Buffer *m) | |
325 | { | |
326 | char *msg; | |
327 | ||
328 | while (buffer_len(m)) { | |
329 | msg = buffer_get_string(m, NULL); | |
1588c277 | 330 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 331 | packet_send_debug("%s", msg); |
332 | xfree(msg); | |
333 | } | |
334 | } | |
335 | ||
336 | int | |
337 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
338 | { | |
339 | Buffer m; | |
340 | u_char *blob; | |
341 | u_int len; | |
92e15201 | 342 | int allowed = 0, have_forced = 0; |
1853d1ef | 343 | |
1588c277 | 344 | debug3("%s entering", __func__); |
1853d1ef | 345 | |
346 | /* Convert the key to a blob and the pass it over */ | |
347 | if (!key_to_blob(key, &blob, &len)) | |
348 | return (0); | |
349 | ||
350 | buffer_init(&m); | |
351 | buffer_put_int(&m, type); | |
352 | buffer_put_cstring(&m, user ? user : ""); | |
353 | buffer_put_cstring(&m, host ? host : ""); | |
354 | buffer_put_string(&m, blob, len); | |
355 | xfree(blob); | |
356 | ||
b5a28cbc | 357 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 358 | |
1588c277 | 359 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 360 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 361 | |
362 | allowed = buffer_get_int(&m); | |
363 | ||
92e15201 | 364 | /* fake forced command */ |
365 | auth_clear_options(); | |
366 | have_forced = buffer_get_int(&m); | |
367 | forced_command = have_forced ? xstrdup("true") : NULL; | |
368 | ||
1853d1ef | 369 | /* Send potential debug messages */ |
370 | mm_send_debug(&m); | |
371 | ||
372 | buffer_free(&m); | |
373 | ||
374 | return (allowed); | |
375 | } | |
376 | ||
377 | /* | |
378 | * This key verify needs to send the key type along, because the | |
379 | * privileged parent makes the decision if the key is allowed | |
380 | * for authentication. | |
381 | */ | |
382 | ||
383 | int | |
384 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
385 | { | |
386 | Buffer m; | |
387 | u_char *blob; | |
388 | u_int len; | |
389 | int verified = 0; | |
390 | ||
1588c277 | 391 | debug3("%s entering", __func__); |
1853d1ef | 392 | |
393 | /* Convert the key to a blob and the pass it over */ | |
394 | if (!key_to_blob(key, &blob, &len)) | |
395 | return (0); | |
396 | ||
397 | buffer_init(&m); | |
398 | buffer_put_string(&m, blob, len); | |
399 | buffer_put_string(&m, sig, siglen); | |
400 | buffer_put_string(&m, data, datalen); | |
401 | xfree(blob); | |
402 | ||
b5a28cbc | 403 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 404 | |
1588c277 | 405 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 406 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 407 | |
408 | verified = buffer_get_int(&m); | |
409 | ||
410 | buffer_free(&m); | |
411 | ||
412 | return (verified); | |
413 | } | |
414 | ||
415 | /* Export key state after authentication */ | |
416 | Newkeys * | |
417 | mm_newkeys_from_blob(u_char *blob, int blen) | |
418 | { | |
419 | Buffer b; | |
420 | u_int len; | |
421 | Newkeys *newkey = NULL; | |
422 | Enc *enc; | |
423 | Mac *mac; | |
424 | Comp *comp; | |
425 | ||
1588c277 | 426 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 427 | #ifdef DEBUG_PK |
428 | dump_base64(stderr, blob, blen); | |
429 | #endif | |
430 | buffer_init(&b); | |
431 | buffer_append(&b, blob, blen); | |
432 | ||
433 | newkey = xmalloc(sizeof(*newkey)); | |
434 | enc = &newkey->enc; | |
435 | mac = &newkey->mac; | |
436 | comp = &newkey->comp; | |
437 | ||
438 | /* Enc structure */ | |
439 | enc->name = buffer_get_string(&b, NULL); | |
440 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
441 | enc->enabled = buffer_get_int(&b); | |
442 | enc->block_size = buffer_get_int(&b); | |
443 | enc->key = buffer_get_string(&b, &enc->key_len); | |
444 | enc->iv = buffer_get_string(&b, &len); | |
445 | if (len != enc->block_size) | |
bb0640b2 | 446 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 447 | enc->block_size, len); |
448 | ||
449 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 450 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 451 | enc->name, enc->cipher); |
452 | ||
453 | /* Mac structure */ | |
454 | mac->name = buffer_get_string(&b, NULL); | |
455 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 456 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 457 | mac->enabled = buffer_get_int(&b); |
458 | mac->key = buffer_get_string(&b, &len); | |
459 | if (len > mac->key_len) | |
bb0640b2 | 460 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 461 | mac->key_len); |
462 | mac->key_len = len; | |
463 | ||
464 | /* Comp structure */ | |
465 | comp->type = buffer_get_int(&b); | |
466 | comp->enabled = buffer_get_int(&b); | |
467 | comp->name = buffer_get_string(&b, NULL); | |
468 | ||
469 | len = buffer_len(&b); | |
470 | if (len != 0) | |
bb0640b2 | 471 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 472 | buffer_free(&b); |
473 | return (newkey); | |
474 | } | |
475 | ||
476 | int | |
477 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
478 | { | |
479 | Buffer b; | |
480 | int len; | |
1853d1ef | 481 | Enc *enc; |
482 | Mac *mac; | |
483 | Comp *comp; | |
484 | Newkeys *newkey = newkeys[mode]; | |
485 | ||
1588c277 | 486 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 487 | |
488 | if (newkey == NULL) { | |
1588c277 | 489 | error("%s: newkey == NULL", __func__); |
1853d1ef | 490 | return 0; |
491 | } | |
492 | enc = &newkey->enc; | |
493 | mac = &newkey->mac; | |
494 | comp = &newkey->comp; | |
495 | ||
496 | buffer_init(&b); | |
497 | /* Enc structure */ | |
498 | buffer_put_cstring(&b, enc->name); | |
499 | /* The cipher struct is constant and shared, you export pointer */ | |
500 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
501 | buffer_put_int(&b, enc->enabled); | |
502 | buffer_put_int(&b, enc->block_size); | |
503 | buffer_put_string(&b, enc->key, enc->key_len); | |
504 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
505 | buffer_put_string(&b, enc->iv, enc->block_size); | |
506 | ||
507 | /* Mac structure */ | |
508 | buffer_put_cstring(&b, mac->name); | |
509 | buffer_put_int(&b, mac->enabled); | |
510 | buffer_put_string(&b, mac->key, mac->key_len); | |
511 | ||
512 | /* Comp structure */ | |
513 | buffer_put_int(&b, comp->type); | |
514 | buffer_put_int(&b, comp->enabled); | |
515 | buffer_put_cstring(&b, comp->name); | |
516 | ||
517 | len = buffer_len(&b); | |
1853d1ef | 518 | if (lenp != NULL) |
519 | *lenp = len; | |
eb9f2fab | 520 | if (blobp != NULL) { |
521 | *blobp = xmalloc(len); | |
522 | memcpy(*blobp, buffer_ptr(&b), len); | |
523 | } | |
524 | memset(buffer_ptr(&b), 0, len); | |
525 | buffer_free(&b); | |
1853d1ef | 526 | return len; |
527 | } | |
528 | ||
529 | static void | |
530 | mm_send_kex(Buffer *m, Kex *kex) | |
531 | { | |
532 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
533 | buffer_put_int(m, kex->we_need); | |
534 | buffer_put_int(m, kex->hostkey_type); | |
535 | buffer_put_int(m, kex->kex_type); | |
536 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
537 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
538 | buffer_put_int(m, kex->flags); | |
539 | buffer_put_cstring(m, kex->client_version_string); | |
540 | buffer_put_cstring(m, kex->server_version_string); | |
541 | } | |
542 | ||
543 | void | |
ca75d7de | 544 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 545 | { |
546 | Buffer m; | |
547 | u_char *blob, *p; | |
548 | u_int bloblen, plen; | |
ffd7b36b | 549 | u_int32_t seqnr, packets; |
550 | u_int64_t blocks; | |
1853d1ef | 551 | |
552 | buffer_init(&m); | |
553 | ||
554 | if (!compat20) { | |
555 | u_char iv[24]; | |
9459414c | 556 | u_char *key; |
557 | u_int ivlen, keylen; | |
1853d1ef | 558 | |
559 | buffer_put_int(&m, packet_get_protocol_flags()); | |
560 | ||
561 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
562 | ||
9459414c | 563 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
564 | keylen = packet_get_encryption_key(NULL); | |
565 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
566 | keylen = packet_get_encryption_key(key); | |
567 | buffer_put_string(&m, key, keylen); | |
568 | memset(key, 0, keylen); | |
569 | xfree(key); | |
570 | ||
1853d1ef | 571 | ivlen = packet_get_keyiv_len(MODE_OUT); |
572 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
573 | buffer_put_string(&m, iv, ivlen); | |
574 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
575 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
576 | buffer_put_string(&m, iv, ivlen); | |
577 | goto skip; | |
578 | } else { | |
579 | /* Kex for rekeying */ | |
ca75d7de | 580 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 581 | } |
582 | ||
583 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 584 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 585 | |
586 | /* Keys from Kex */ | |
587 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 588 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 589 | |
590 | buffer_put_string(&m, blob, bloblen); | |
591 | xfree(blob); | |
592 | ||
593 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 594 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 595 | |
596 | buffer_put_string(&m, blob, bloblen); | |
597 | xfree(blob); | |
598 | ||
ffd7b36b | 599 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
600 | buffer_put_int(&m, seqnr); | |
601 | buffer_put_int64(&m, blocks); | |
602 | buffer_put_int(&m, packets); | |
806e4c11 | 603 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 604 | buffer_put_int(&m, seqnr); |
605 | buffer_put_int64(&m, blocks); | |
606 | buffer_put_int(&m, packets); | |
1853d1ef | 607 | |
1588c277 | 608 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 609 | skip: |
610 | /* More key context */ | |
611 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
612 | p = xmalloc(plen+1); | |
613 | packet_get_keycontext(MODE_OUT, p); | |
614 | buffer_put_string(&m, p, plen); | |
615 | xfree(p); | |
616 | ||
617 | plen = packet_get_keycontext(MODE_IN, NULL); | |
618 | p = xmalloc(plen+1); | |
619 | packet_get_keycontext(MODE_IN, p); | |
620 | buffer_put_string(&m, p, plen); | |
621 | xfree(p); | |
622 | ||
623 | /* Compression state */ | |
1588c277 | 624 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 625 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
626 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
627 | ||
628 | /* Network I/O buffers */ | |
629 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
630 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
631 | ||
ca75d7de | 632 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 633 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 634 | |
635 | buffer_free(&m); | |
636 | } | |
637 | ||
638 | int | |
148de80c | 639 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
1853d1ef | 640 | { |
641 | Buffer m; | |
be2ca0c9 | 642 | char *p, *msg; |
1853d1ef | 643 | int success = 0; |
644 | ||
645 | buffer_init(&m); | |
b5a28cbc | 646 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 647 | |
1588c277 | 648 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 649 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 650 | |
651 | success = buffer_get_int(&m); | |
652 | if (success == 0) { | |
1588c277 | 653 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 654 | buffer_free(&m); |
655 | return (0); | |
656 | } | |
657 | p = buffer_get_string(&m, NULL); | |
be2ca0c9 | 658 | msg = buffer_get_string(&m, NULL); |
1853d1ef | 659 | buffer_free(&m); |
660 | ||
661 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
662 | xfree(p); | |
663 | ||
be2ca0c9 | 664 | buffer_append(&loginmsg, msg, strlen(msg)); |
665 | xfree(msg); | |
666 | ||
b5a28cbc | 667 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
668 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 669 | |
670 | /* Success */ | |
671 | return (1); | |
672 | } | |
673 | ||
674 | void | |
2362db19 | 675 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 676 | { |
1853d1ef | 677 | Buffer m; |
678 | ||
679 | if (s->ttyfd == -1) | |
680 | return; | |
681 | buffer_init(&m); | |
682 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 683 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 684 | buffer_free(&m); |
685 | ||
686 | /* closed dup'ed master */ | |
687 | if (close(s->ptymaster) < 0) | |
688 | error("close(s->ptymaster): %s", strerror(errno)); | |
689 | ||
690 | /* unlink pty from session */ | |
691 | s->ttyfd = -1; | |
692 | } | |
693 | ||
ad200abb | 694 | #ifdef USE_PAM |
695 | void | |
529d73ab | 696 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 697 | { |
698 | Buffer m; | |
699 | ||
1588c277 | 700 | debug3("%s entering", __func__); |
7fceb20d | 701 | if (!options.use_pam) |
702 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 703 | |
704 | buffer_init(&m); | |
b5a28cbc | 705 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 706 | |
707 | buffer_free(&m); | |
708 | } | |
05114c74 | 709 | |
5b9e2464 | 710 | u_int |
711 | mm_do_pam_account(void) | |
712 | { | |
713 | Buffer m; | |
714 | u_int ret; | |
ba6dd90e | 715 | char *msg; |
5b9e2464 | 716 | |
717 | debug3("%s entering", __func__); | |
718 | if (!options.use_pam) | |
719 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
720 | ||
721 | buffer_init(&m); | |
722 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
723 | ||
aff51935 | 724 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 725 | MONITOR_ANS_PAM_ACCOUNT, &m); |
726 | ret = buffer_get_int(&m); | |
ba6dd90e | 727 | msg = buffer_get_string(&m, NULL); |
728 | buffer_append(&loginmsg, msg, strlen(msg)); | |
729 | xfree(msg); | |
5b9e2464 | 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; | |
a1a073cc | 765 | u_int i; |
766 | int ret; | |
05114c74 | 767 | |
768 | debug3("%s", __func__); | |
769 | buffer_init(&m); | |
770 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
771 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
772 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
773 | ret = buffer_get_int(&m); | |
774 | debug3("%s: pam_query returned %d", __func__, ret); | |
775 | *name = buffer_get_string(&m, NULL); | |
776 | *info = buffer_get_string(&m, NULL); | |
777 | *num = buffer_get_int(&m); | |
778 | *prompts = xmalloc((*num + 1) * sizeof(char *)); | |
779 | *echo_on = xmalloc((*num + 1) * sizeof(u_int)); | |
780 | for (i = 0; i < *num; ++i) { | |
781 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
782 | (*echo_on)[i] = buffer_get_int(&m); | |
783 | } | |
784 | buffer_free(&m); | |
785 | return (ret); | |
786 | } | |
787 | ||
788 | int | |
789 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
790 | { | |
791 | Buffer m; | |
a1a073cc | 792 | u_int i; |
793 | int ret; | |
05114c74 | 794 | |
795 | debug3("%s", __func__); | |
796 | buffer_init(&m); | |
797 | buffer_put_int(&m, num); | |
798 | for (i = 0; i < num; ++i) | |
799 | buffer_put_cstring(&m, resp[i]); | |
800 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
801 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
802 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
803 | ret = buffer_get_int(&m); | |
804 | debug3("%s: pam_respond returned %d", __func__, ret); | |
805 | buffer_free(&m); | |
806 | return (ret); | |
807 | } | |
808 | ||
809 | void | |
810 | mm_sshpam_free_ctx(void *ctxtp) | |
811 | { | |
812 | Buffer m; | |
813 | ||
814 | debug3("%s", __func__); | |
815 | buffer_init(&m); | |
816 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
817 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
818 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
819 | buffer_free(&m); | |
820 | } | |
ad200abb | 821 | #endif /* USE_PAM */ |
822 | ||
1853d1ef | 823 | /* Request process termination */ |
824 | ||
825 | void | |
826 | mm_terminate(void) | |
827 | { | |
828 | Buffer m; | |
829 | ||
830 | buffer_init(&m); | |
b5a28cbc | 831 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 832 | buffer_free(&m); |
833 | } | |
834 | ||
835 | int | |
836 | mm_ssh1_session_key(BIGNUM *num) | |
837 | { | |
838 | int rsafail; | |
839 | Buffer m; | |
840 | ||
841 | buffer_init(&m); | |
842 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 843 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 844 | |
b5a28cbc | 845 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 846 | |
847 | rsafail = buffer_get_int(&m); | |
848 | buffer_get_bignum2(&m, num); | |
849 | ||
850 | buffer_free(&m); | |
851 | ||
852 | return (rsafail); | |
853 | } | |
854 | ||
855 | static void | |
856 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
857 | char ***prompts, u_int **echo_on) | |
858 | { | |
7203d6bb | 859 | *name = xstrdup(""); |
860 | *infotxt = xstrdup(""); | |
1853d1ef | 861 | *numprompts = 1; |
52e3daed | 862 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
863 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
1853d1ef | 864 | (*echo_on)[0] = 0; |
865 | } | |
866 | ||
867 | int | |
868 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
869 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
870 | { | |
871 | Buffer m; | |
6d6c25e3 | 872 | u_int success; |
1853d1ef | 873 | char *challenge; |
874 | ||
1588c277 | 875 | debug3("%s: entering", __func__); |
1853d1ef | 876 | |
877 | buffer_init(&m); | |
b5a28cbc | 878 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 879 | |
b5a28cbc | 880 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 881 | &m); |
6d6c25e3 | 882 | success = buffer_get_int(&m); |
883 | if (success == 0) { | |
1588c277 | 884 | debug3("%s: no challenge", __func__); |
1853d1ef | 885 | buffer_free(&m); |
886 | return (-1); | |
887 | } | |
888 | ||
889 | /* Get the challenge, and format the response */ | |
890 | challenge = buffer_get_string(&m, NULL); | |
891 | buffer_free(&m); | |
892 | ||
893 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
894 | (*prompts)[0] = challenge; | |
895 | ||
1588c277 | 896 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 897 | |
898 | return (0); | |
899 | } | |
900 | ||
901 | int | |
902 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
903 | { | |
904 | Buffer m; | |
905 | int authok; | |
906 | ||
1588c277 | 907 | debug3("%s: entering", __func__); |
1853d1ef | 908 | if (numresponses != 1) |
909 | return (-1); | |
910 | ||
911 | buffer_init(&m); | |
912 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 913 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 914 | |
b5a28cbc | 915 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 916 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
917 | ||
918 | authok = buffer_get_int(&m); | |
919 | buffer_free(&m); | |
920 | ||
921 | return ((authok == 0) ? -1 : 0); | |
922 | } | |
923 | ||
77751377 | 924 | #ifdef SKEY |
1853d1ef | 925 | int |
926 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
927 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
928 | { | |
929 | Buffer m; | |
6d6c25e3 | 930 | int len; |
931 | u_int success; | |
1853d1ef | 932 | char *p, *challenge; |
933 | ||
1588c277 | 934 | debug3("%s: entering", __func__); |
1853d1ef | 935 | |
936 | buffer_init(&m); | |
b5a28cbc | 937 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 938 | |
b5a28cbc | 939 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 940 | &m); |
6d6c25e3 | 941 | success = buffer_get_int(&m); |
942 | if (success == 0) { | |
1588c277 | 943 | debug3("%s: no challenge", __func__); |
1853d1ef | 944 | buffer_free(&m); |
945 | return (-1); | |
946 | } | |
947 | ||
948 | /* Get the challenge, and format the response */ | |
949 | challenge = buffer_get_string(&m, NULL); | |
950 | buffer_free(&m); | |
951 | ||
1588c277 | 952 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 953 | |
954 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
955 | ||
52e3daed | 956 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
1853d1ef | 957 | xfree(challenge); |
958 | ||
959 | return (0); | |
960 | } | |
961 | ||
962 | int | |
963 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
964 | { | |
965 | Buffer m; | |
966 | int authok; | |
967 | ||
1588c277 | 968 | debug3("%s: entering", __func__); |
1853d1ef | 969 | if (numresponses != 1) |
970 | return (-1); | |
971 | ||
972 | buffer_init(&m); | |
973 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 974 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 975 | |
b5a28cbc | 976 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 977 | MONITOR_ANS_SKEYRESPOND, &m); |
978 | ||
979 | authok = buffer_get_int(&m); | |
980 | buffer_free(&m); | |
981 | ||
982 | return ((authok == 0) ? -1 : 0); | |
983 | } | |
77751377 | 984 | #endif /* SKEY */ |
1853d1ef | 985 | |
986 | void | |
987 | mm_ssh1_session_id(u_char session_id[16]) | |
988 | { | |
989 | Buffer m; | |
990 | int i; | |
991 | ||
1588c277 | 992 | debug3("%s entering", __func__); |
1853d1ef | 993 | |
994 | buffer_init(&m); | |
995 | for (i = 0; i < 16; i++) | |
996 | buffer_put_char(&m, session_id[i]); | |
997 | ||
b5a28cbc | 998 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 999 | buffer_free(&m); |
1000 | } | |
1001 | ||
1002 | int | |
1003 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1004 | { | |
1005 | Buffer m; | |
1006 | Key *key; | |
1007 | u_char *blob; | |
1008 | u_int blen; | |
92e15201 | 1009 | int allowed = 0, have_forced = 0; |
1853d1ef | 1010 | |
1588c277 | 1011 | debug3("%s entering", __func__); |
1853d1ef | 1012 | |
1013 | buffer_init(&m); | |
1014 | buffer_put_bignum2(&m, client_n); | |
1015 | ||
b5a28cbc | 1016 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1017 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1018 | |
1019 | allowed = buffer_get_int(&m); | |
1020 | ||
92e15201 | 1021 | /* fake forced command */ |
1022 | auth_clear_options(); | |
1023 | have_forced = buffer_get_int(&m); | |
1024 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1025 | ||
1853d1ef | 1026 | if (allowed && rkey != NULL) { |
1027 | blob = buffer_get_string(&m, &blen); | |
1028 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1029 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1030 | *rkey = key; |
1031 | xfree(blob); | |
1032 | } | |
1033 | mm_send_debug(&m); | |
1034 | buffer_free(&m); | |
1035 | ||
1036 | return (allowed); | |
1037 | } | |
1038 | ||
1039 | BIGNUM * | |
1040 | mm_auth_rsa_generate_challenge(Key *key) | |
1041 | { | |
1042 | Buffer m; | |
1043 | BIGNUM *challenge; | |
1044 | u_char *blob; | |
1045 | u_int blen; | |
1046 | ||
1588c277 | 1047 | debug3("%s entering", __func__); |
1853d1ef | 1048 | |
1049 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1050 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1051 | |
1052 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1053 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1054 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1055 | key->type = KEY_RSA1; |
1056 | ||
1057 | buffer_init(&m); | |
1058 | buffer_put_string(&m, blob, blen); | |
1059 | xfree(blob); | |
1060 | ||
b5a28cbc | 1061 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1062 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1063 | |
1064 | buffer_get_bignum2(&m, challenge); | |
1065 | buffer_free(&m); | |
1066 | ||
1067 | return (challenge); | |
1068 | } | |
1069 | ||
1070 | int | |
1071 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1072 | { | |
1073 | Buffer m; | |
1074 | u_char *blob; | |
1075 | u_int blen; | |
1076 | int success = 0; | |
1077 | ||
1588c277 | 1078 | debug3("%s entering", __func__); |
1853d1ef | 1079 | |
1080 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1081 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1082 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1083 | key->type = KEY_RSA1; |
1084 | ||
1085 | buffer_init(&m); | |
1086 | buffer_put_string(&m, blob, blen); | |
1087 | buffer_put_string(&m, response, 16); | |
1088 | xfree(blob); | |
1089 | ||
b5a28cbc | 1090 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1091 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1092 | |
1093 | success = buffer_get_int(&m); | |
1094 | buffer_free(&m); | |
1095 | ||
1096 | return (success); | |
1097 | } | |
696f6bef | 1098 | |
6039eeef | 1099 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 1100 | void |
1101 | mm_audit_event(ssh_audit_event_t event) | |
1102 | { | |
1103 | Buffer m; | |
1104 | ||
1105 | debug3("%s entering", __func__); | |
1106 | ||
1107 | buffer_init(&m); | |
1108 | buffer_put_int(&m, event); | |
1109 | ||
1110 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1111 | buffer_free(&m); | |
1112 | } | |
1113 | ||
1114 | void | |
1115 | mm_audit_run_command(const char *command) | |
1116 | { | |
1117 | Buffer m; | |
1118 | ||
1119 | debug3("%s entering command %s", __func__, command); | |
1120 | ||
1121 | buffer_init(&m); | |
1122 | buffer_put_cstring(&m, command); | |
1123 | ||
1124 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1125 | buffer_free(&m); | |
1126 | } | |
6039eeef | 1127 | #endif /* SSH_AUDIT_EVENTS */ |
c00e4d75 | 1128 | |
7364bd04 | 1129 | #ifdef GSSAPI |
1130 | OM_uint32 | |
ca75d7de | 1131 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1132 | { |
1133 | Buffer m; | |
1134 | OM_uint32 major; | |
1135 | ||
1136 | /* Client doesn't get to see the context */ | |
1137 | *ctx = NULL; | |
1138 | ||
1139 | buffer_init(&m); | |
ca75d7de | 1140 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1141 | |
1142 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1143 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1144 | ||
1145 | major = buffer_get_int(&m); | |
1146 | ||
1147 | buffer_free(&m); | |
1148 | return (major); | |
1149 | } | |
1150 | ||
1151 | OM_uint32 | |
1152 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1153 | gss_buffer_desc *out, OM_uint32 *flags) | |
1154 | { | |
1155 | Buffer m; | |
1156 | OM_uint32 major; | |
f99e1ca4 | 1157 | u_int len; |
7364bd04 | 1158 | |
1159 | buffer_init(&m); | |
1160 | buffer_put_string(&m, in->value, in->length); | |
1161 | ||
1162 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1163 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1164 | ||
1165 | major = buffer_get_int(&m); | |
f99e1ca4 | 1166 | out->value = buffer_get_string(&m, &len); |
1167 | out->length = len; | |
7364bd04 | 1168 | if (flags) |
1169 | *flags = buffer_get_int(&m); | |
1170 | ||
1171 | buffer_free(&m); | |
1172 | ||
1173 | return (major); | |
1174 | } | |
1175 | ||
0789992b | 1176 | OM_uint32 |
1177 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1178 | { | |
1179 | Buffer m; | |
1180 | OM_uint32 major; | |
1181 | ||
1182 | buffer_init(&m); | |
1183 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1184 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1185 | ||
1186 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1187 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1188 | &m); | |
1189 | ||
1190 | major = buffer_get_int(&m); | |
1191 | buffer_free(&m); | |
1192 | return(major); | |
1193 | } | |
1194 | ||
7364bd04 | 1195 | int |
1196 | mm_ssh_gssapi_userok(char *user) | |
1197 | { | |
1198 | Buffer m; | |
1199 | int authenticated = 0; | |
1200 | ||
1201 | buffer_init(&m); | |
1202 | ||
1203 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1204 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1205 | &m); | |
1206 | ||
1207 | authenticated = buffer_get_int(&m); | |
1208 | ||
1209 | buffer_free(&m); | |
1210 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1211 | return (authenticated); | |
1212 | } | |
1213 | #endif /* GSSAPI */ |