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028094f4 | 1 | /* $OpenBSD: monitor_wrap.c,v 1.47 2006/07/11 20:07:25 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> |
37 | ||
1853d1ef | 38 | #include "ssh.h" |
39 | #include "dh.h" | |
40 | #include "kex.h" | |
41 | #include "auth.h" | |
92e15201 | 42 | #include "auth-options.h" |
1853d1ef | 43 | #include "buffer.h" |
44 | #include "bufaux.h" | |
45 | #include "packet.h" | |
46 | #include "mac.h" | |
47 | #include "log.h" | |
a655c012 | 48 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
49 | #undef TARGET_OS_MAC | |
9b08c23f | 50 | #include "zlib.h" |
a655c012 | 51 | #define TARGET_OS_MAC 1 |
52 | #else | |
53 | #include "zlib.h" | |
54 | #endif | |
1853d1ef | 55 | #include "monitor.h" |
56 | #include "monitor_wrap.h" | |
57 | #include "xmalloc.h" | |
58 | #include "atomicio.h" | |
59 | #include "monitor_fdpass.h" | |
51e7a012 | 60 | #include "misc.h" |
7fceb20d | 61 | #include "servconf.h" |
1853d1ef | 62 | |
63 | #include "auth.h" | |
64 | #include "channels.h" | |
65 | #include "session.h" | |
66 | ||
7364bd04 | 67 | #ifdef GSSAPI |
68 | #include "ssh-gss.h" | |
69 | #endif | |
70 | ||
1853d1ef | 71 | /* Imports */ |
72 | extern int compat20; | |
73 | extern Newkeys *newkeys[]; | |
74 | extern z_stream incoming_stream; | |
75 | extern z_stream outgoing_stream; | |
b5a28cbc | 76 | extern struct monitor *pmonitor; |
1853d1ef | 77 | extern Buffer input, output; |
be2ca0c9 | 78 | extern Buffer loginmsg; |
7fceb20d | 79 | extern ServerOptions options; |
1853d1ef | 80 | |
2362db19 | 81 | int |
82 | mm_is_monitor(void) | |
83 | { | |
84 | /* | |
85 | * m_pid is only set in the privileged part, and | |
86 | * points to the unprivileged child. | |
87 | */ | |
74677ba3 | 88 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 89 | } |
90 | ||
1853d1ef | 91 | void |
ca75d7de | 92 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 93 | { |
1853d1ef | 94 | u_int mlen = buffer_len(m); |
405a0d43 | 95 | u_char buf[5]; |
1853d1ef | 96 | |
1588c277 | 97 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 98 | |
51e7a012 | 99 | put_u32(buf, mlen + 1); |
7203d6bb | 100 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
ca75d7de | 101 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
05624c18 | 102 | fatal("%s: write: %s", __func__, strerror(errno)); |
ca75d7de | 103 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
05624c18 | 104 | fatal("%s: write: %s", __func__, strerror(errno)); |
1853d1ef | 105 | } |
106 | ||
107 | void | |
ca75d7de | 108 | mm_request_receive(int sock, Buffer *m) |
1853d1ef | 109 | { |
110 | u_char buf[4]; | |
1853d1ef | 111 | u_int msg_len; |
112 | ||
1588c277 | 113 | debug3("%s entering", __func__); |
1853d1ef | 114 | |
05624c18 | 115 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
116 | if (errno == EPIPE) | |
2362db19 | 117 | cleanup_exit(255); |
05624c18 | 118 | fatal("%s: read: %s", __func__, strerror(errno)); |
1853d1ef | 119 | } |
51e7a012 | 120 | msg_len = get_u32(buf); |
1853d1ef | 121 | if (msg_len > 256 * 1024) |
1588c277 | 122 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 123 | buffer_clear(m); |
124 | buffer_append_space(m, msg_len); | |
05624c18 | 125 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
126 | fatal("%s: read: %s", __func__, strerror(errno)); | |
1853d1ef | 127 | } |
128 | ||
129 | void | |
ca75d7de | 130 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 131 | { |
132 | u_char rtype; | |
133 | ||
1588c277 | 134 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 135 | |
ca75d7de | 136 | mm_request_receive(sock, m); |
1853d1ef | 137 | rtype = buffer_get_char(m); |
138 | if (rtype != type) | |
1588c277 | 139 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 140 | rtype, type); |
141 | } | |
142 | ||
143 | DH * | |
144 | mm_choose_dh(int min, int nbits, int max) | |
145 | { | |
146 | BIGNUM *p, *g; | |
147 | int success = 0; | |
148 | Buffer m; | |
149 | ||
150 | buffer_init(&m); | |
151 | buffer_put_int(&m, min); | |
152 | buffer_put_int(&m, nbits); | |
153 | buffer_put_int(&m, max); | |
154 | ||
b5a28cbc | 155 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 156 | |
1588c277 | 157 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 158 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 159 | |
160 | success = buffer_get_char(&m); | |
161 | if (success == 0) | |
1588c277 | 162 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 163 | |
164 | if ((p = BN_new()) == NULL) | |
1588c277 | 165 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 166 | if ((g = BN_new()) == NULL) |
1588c277 | 167 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 168 | buffer_get_bignum2(&m, p); |
169 | buffer_get_bignum2(&m, g); | |
170 | ||
1588c277 | 171 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 172 | buffer_free(&m); |
173 | ||
174 | return (dh_new_group(g, p)); | |
175 | } | |
176 | ||
177 | int | |
178 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
179 | { | |
b5a28cbc | 180 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 181 | Buffer m; |
182 | ||
1588c277 | 183 | debug3("%s entering", __func__); |
1853d1ef | 184 | |
185 | buffer_init(&m); | |
186 | buffer_put_int(&m, kex->host_key_index(key)); | |
187 | buffer_put_string(&m, data, datalen); | |
188 | ||
b5a28cbc | 189 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 190 | |
1588c277 | 191 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 192 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 193 | *sigp = buffer_get_string(&m, lenp); |
194 | buffer_free(&m); | |
195 | ||
196 | return (0); | |
197 | } | |
198 | ||
199 | struct passwd * | |
18a8f313 | 200 | mm_getpwnamallow(const char *username) |
1853d1ef | 201 | { |
202 | Buffer m; | |
203 | struct passwd *pw; | |
204 | u_int pwlen; | |
205 | ||
1588c277 | 206 | debug3("%s entering", __func__); |
1853d1ef | 207 | |
208 | buffer_init(&m); | |
18a8f313 | 209 | buffer_put_cstring(&m, username); |
1853d1ef | 210 | |
b5a28cbc | 211 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 212 | |
1588c277 | 213 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 214 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 215 | |
216 | if (buffer_get_char(&m) == 0) { | |
217 | buffer_free(&m); | |
218 | return (NULL); | |
219 | } | |
220 | pw = buffer_get_string(&m, &pwlen); | |
221 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 222 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 223 | pw->pw_name = buffer_get_string(&m, NULL); |
224 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
225 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 226 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 227 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 228 | #endif |
1853d1ef | 229 | pw->pw_dir = buffer_get_string(&m, NULL); |
230 | pw->pw_shell = buffer_get_string(&m, NULL); | |
231 | buffer_free(&m); | |
232 | ||
233 | return (pw); | |
234 | } | |
235 | ||
02cd6c56 | 236 | char * |
237 | mm_auth2_read_banner(void) | |
94a73cdc | 238 | { |
239 | Buffer m; | |
240 | char *banner; | |
241 | ||
1588c277 | 242 | debug3("%s entering", __func__); |
94a73cdc | 243 | |
244 | buffer_init(&m); | |
b5a28cbc | 245 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 246 | buffer_clear(&m); |
247 | ||
02cd6c56 | 248 | mm_request_receive_expect(pmonitor->m_recvfd, |
249 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 250 | banner = buffer_get_string(&m, NULL); |
251 | buffer_free(&m); | |
7203d6bb | 252 | |
02cd6c56 | 253 | /* treat empty banner as missing banner */ |
254 | if (strlen(banner) == 0) { | |
255 | xfree(banner); | |
256 | banner = NULL; | |
257 | } | |
94a73cdc | 258 | return (banner); |
259 | } | |
260 | ||
1853d1ef | 261 | /* Inform the privileged process about service and style */ |
262 | ||
263 | void | |
264 | mm_inform_authserv(char *service, char *style) | |
265 | { | |
266 | Buffer m; | |
267 | ||
1588c277 | 268 | debug3("%s entering", __func__); |
1853d1ef | 269 | |
270 | buffer_init(&m); | |
271 | buffer_put_cstring(&m, service); | |
272 | buffer_put_cstring(&m, style ? style : ""); | |
273 | ||
b5a28cbc | 274 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 275 | |
276 | buffer_free(&m); | |
277 | } | |
278 | ||
279 | /* Do the password authentication */ | |
280 | int | |
281 | mm_auth_password(Authctxt *authctxt, char *password) | |
282 | { | |
283 | Buffer m; | |
284 | int authenticated = 0; | |
285 | ||
1588c277 | 286 | debug3("%s entering", __func__); |
1853d1ef | 287 | |
288 | buffer_init(&m); | |
289 | buffer_put_cstring(&m, password); | |
b5a28cbc | 290 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 291 | |
1588c277 | 292 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 293 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 294 | |
295 | authenticated = buffer_get_int(&m); | |
296 | ||
297 | buffer_free(&m); | |
298 | ||
299 | debug3("%s: user %sauthenticated", | |
1588c277 | 300 | __func__, authenticated ? "" : "not "); |
1853d1ef | 301 | return (authenticated); |
302 | } | |
303 | ||
304 | int | |
305 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
306 | { | |
307 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
308 | } | |
309 | ||
310 | int | |
311 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
312 | Key *key) | |
313 | { | |
314 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
315 | } | |
316 | ||
317 | int | |
318 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
319 | char *host, Key *key) | |
320 | { | |
321 | int ret; | |
322 | ||
323 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
324 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
325 | key->type = KEY_RSA1; | |
326 | return (ret); | |
327 | } | |
328 | ||
329 | static void | |
330 | mm_send_debug(Buffer *m) | |
331 | { | |
332 | char *msg; | |
333 | ||
334 | while (buffer_len(m)) { | |
335 | msg = buffer_get_string(m, NULL); | |
1588c277 | 336 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 337 | packet_send_debug("%s", msg); |
338 | xfree(msg); | |
339 | } | |
340 | } | |
341 | ||
342 | int | |
343 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
344 | { | |
345 | Buffer m; | |
346 | u_char *blob; | |
347 | u_int len; | |
92e15201 | 348 | int allowed = 0, have_forced = 0; |
1853d1ef | 349 | |
1588c277 | 350 | debug3("%s entering", __func__); |
1853d1ef | 351 | |
352 | /* Convert the key to a blob and the pass it over */ | |
353 | if (!key_to_blob(key, &blob, &len)) | |
354 | return (0); | |
355 | ||
356 | buffer_init(&m); | |
357 | buffer_put_int(&m, type); | |
358 | buffer_put_cstring(&m, user ? user : ""); | |
359 | buffer_put_cstring(&m, host ? host : ""); | |
360 | buffer_put_string(&m, blob, len); | |
361 | xfree(blob); | |
362 | ||
b5a28cbc | 363 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 364 | |
1588c277 | 365 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 366 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 367 | |
368 | allowed = buffer_get_int(&m); | |
369 | ||
92e15201 | 370 | /* fake forced command */ |
371 | auth_clear_options(); | |
372 | have_forced = buffer_get_int(&m); | |
373 | forced_command = have_forced ? xstrdup("true") : NULL; | |
374 | ||
1853d1ef | 375 | /* Send potential debug messages */ |
376 | mm_send_debug(&m); | |
377 | ||
378 | buffer_free(&m); | |
379 | ||
380 | return (allowed); | |
381 | } | |
382 | ||
383 | /* | |
384 | * This key verify needs to send the key type along, because the | |
385 | * privileged parent makes the decision if the key is allowed | |
386 | * for authentication. | |
387 | */ | |
388 | ||
389 | int | |
390 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
391 | { | |
392 | Buffer m; | |
393 | u_char *blob; | |
394 | u_int len; | |
395 | int verified = 0; | |
396 | ||
1588c277 | 397 | debug3("%s entering", __func__); |
1853d1ef | 398 | |
399 | /* Convert the key to a blob and the pass it over */ | |
400 | if (!key_to_blob(key, &blob, &len)) | |
401 | return (0); | |
402 | ||
403 | buffer_init(&m); | |
404 | buffer_put_string(&m, blob, len); | |
405 | buffer_put_string(&m, sig, siglen); | |
406 | buffer_put_string(&m, data, datalen); | |
407 | xfree(blob); | |
408 | ||
b5a28cbc | 409 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 410 | |
1588c277 | 411 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 412 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 413 | |
414 | verified = buffer_get_int(&m); | |
415 | ||
416 | buffer_free(&m); | |
417 | ||
418 | return (verified); | |
419 | } | |
420 | ||
421 | /* Export key state after authentication */ | |
422 | Newkeys * | |
423 | mm_newkeys_from_blob(u_char *blob, int blen) | |
424 | { | |
425 | Buffer b; | |
426 | u_int len; | |
427 | Newkeys *newkey = NULL; | |
428 | Enc *enc; | |
429 | Mac *mac; | |
430 | Comp *comp; | |
431 | ||
1588c277 | 432 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 433 | #ifdef DEBUG_PK |
434 | dump_base64(stderr, blob, blen); | |
435 | #endif | |
436 | buffer_init(&b); | |
437 | buffer_append(&b, blob, blen); | |
438 | ||
439 | newkey = xmalloc(sizeof(*newkey)); | |
440 | enc = &newkey->enc; | |
441 | mac = &newkey->mac; | |
442 | comp = &newkey->comp; | |
443 | ||
444 | /* Enc structure */ | |
445 | enc->name = buffer_get_string(&b, NULL); | |
446 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
447 | enc->enabled = buffer_get_int(&b); | |
448 | enc->block_size = buffer_get_int(&b); | |
449 | enc->key = buffer_get_string(&b, &enc->key_len); | |
450 | enc->iv = buffer_get_string(&b, &len); | |
451 | if (len != enc->block_size) | |
bb0640b2 | 452 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 453 | enc->block_size, len); |
454 | ||
455 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 456 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 457 | enc->name, enc->cipher); |
458 | ||
459 | /* Mac structure */ | |
460 | mac->name = buffer_get_string(&b, NULL); | |
461 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 462 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 463 | mac->enabled = buffer_get_int(&b); |
464 | mac->key = buffer_get_string(&b, &len); | |
465 | if (len > mac->key_len) | |
bb0640b2 | 466 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 467 | mac->key_len); |
468 | mac->key_len = len; | |
469 | ||
470 | /* Comp structure */ | |
471 | comp->type = buffer_get_int(&b); | |
472 | comp->enabled = buffer_get_int(&b); | |
473 | comp->name = buffer_get_string(&b, NULL); | |
474 | ||
475 | len = buffer_len(&b); | |
476 | if (len != 0) | |
bb0640b2 | 477 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 478 | buffer_free(&b); |
479 | return (newkey); | |
480 | } | |
481 | ||
482 | int | |
483 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
484 | { | |
485 | Buffer b; | |
486 | int len; | |
1853d1ef | 487 | Enc *enc; |
488 | Mac *mac; | |
489 | Comp *comp; | |
490 | Newkeys *newkey = newkeys[mode]; | |
491 | ||
1588c277 | 492 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 493 | |
494 | if (newkey == NULL) { | |
1588c277 | 495 | error("%s: newkey == NULL", __func__); |
1853d1ef | 496 | return 0; |
497 | } | |
498 | enc = &newkey->enc; | |
499 | mac = &newkey->mac; | |
500 | comp = &newkey->comp; | |
501 | ||
502 | buffer_init(&b); | |
503 | /* Enc structure */ | |
504 | buffer_put_cstring(&b, enc->name); | |
505 | /* The cipher struct is constant and shared, you export pointer */ | |
506 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
507 | buffer_put_int(&b, enc->enabled); | |
508 | buffer_put_int(&b, enc->block_size); | |
509 | buffer_put_string(&b, enc->key, enc->key_len); | |
510 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
511 | buffer_put_string(&b, enc->iv, enc->block_size); | |
512 | ||
513 | /* Mac structure */ | |
514 | buffer_put_cstring(&b, mac->name); | |
515 | buffer_put_int(&b, mac->enabled); | |
516 | buffer_put_string(&b, mac->key, mac->key_len); | |
517 | ||
518 | /* Comp structure */ | |
519 | buffer_put_int(&b, comp->type); | |
520 | buffer_put_int(&b, comp->enabled); | |
521 | buffer_put_cstring(&b, comp->name); | |
522 | ||
523 | len = buffer_len(&b); | |
1853d1ef | 524 | if (lenp != NULL) |
525 | *lenp = len; | |
eb9f2fab | 526 | if (blobp != NULL) { |
527 | *blobp = xmalloc(len); | |
528 | memcpy(*blobp, buffer_ptr(&b), len); | |
529 | } | |
530 | memset(buffer_ptr(&b), 0, len); | |
531 | buffer_free(&b); | |
1853d1ef | 532 | return len; |
533 | } | |
534 | ||
535 | static void | |
536 | mm_send_kex(Buffer *m, Kex *kex) | |
537 | { | |
538 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
539 | buffer_put_int(m, kex->we_need); | |
540 | buffer_put_int(m, kex->hostkey_type); | |
541 | buffer_put_int(m, kex->kex_type); | |
542 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
543 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
544 | buffer_put_int(m, kex->flags); | |
545 | buffer_put_cstring(m, kex->client_version_string); | |
546 | buffer_put_cstring(m, kex->server_version_string); | |
547 | } | |
548 | ||
549 | void | |
ca75d7de | 550 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 551 | { |
552 | Buffer m; | |
553 | u_char *blob, *p; | |
554 | u_int bloblen, plen; | |
ffd7b36b | 555 | u_int32_t seqnr, packets; |
556 | u_int64_t blocks; | |
1853d1ef | 557 | |
558 | buffer_init(&m); | |
559 | ||
560 | if (!compat20) { | |
561 | u_char iv[24]; | |
9459414c | 562 | u_char *key; |
563 | u_int ivlen, keylen; | |
1853d1ef | 564 | |
565 | buffer_put_int(&m, packet_get_protocol_flags()); | |
566 | ||
567 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
568 | ||
9459414c | 569 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
570 | keylen = packet_get_encryption_key(NULL); | |
571 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
572 | keylen = packet_get_encryption_key(key); | |
573 | buffer_put_string(&m, key, keylen); | |
574 | memset(key, 0, keylen); | |
575 | xfree(key); | |
576 | ||
1853d1ef | 577 | ivlen = packet_get_keyiv_len(MODE_OUT); |
578 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
579 | buffer_put_string(&m, iv, ivlen); | |
580 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
581 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
582 | buffer_put_string(&m, iv, ivlen); | |
583 | goto skip; | |
584 | } else { | |
585 | /* Kex for rekeying */ | |
ca75d7de | 586 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 587 | } |
588 | ||
589 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 590 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 591 | |
592 | /* Keys from Kex */ | |
593 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 594 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 595 | |
596 | buffer_put_string(&m, blob, bloblen); | |
597 | xfree(blob); | |
598 | ||
599 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 600 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 601 | |
602 | buffer_put_string(&m, blob, bloblen); | |
603 | xfree(blob); | |
604 | ||
ffd7b36b | 605 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
606 | buffer_put_int(&m, seqnr); | |
607 | buffer_put_int64(&m, blocks); | |
608 | buffer_put_int(&m, packets); | |
806e4c11 | 609 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 610 | buffer_put_int(&m, seqnr); |
611 | buffer_put_int64(&m, blocks); | |
612 | buffer_put_int(&m, packets); | |
1853d1ef | 613 | |
1588c277 | 614 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 615 | skip: |
616 | /* More key context */ | |
617 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
618 | p = xmalloc(plen+1); | |
619 | packet_get_keycontext(MODE_OUT, p); | |
620 | buffer_put_string(&m, p, plen); | |
621 | xfree(p); | |
622 | ||
623 | plen = packet_get_keycontext(MODE_IN, NULL); | |
624 | p = xmalloc(plen+1); | |
625 | packet_get_keycontext(MODE_IN, p); | |
626 | buffer_put_string(&m, p, plen); | |
627 | xfree(p); | |
628 | ||
629 | /* Compression state */ | |
1588c277 | 630 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 631 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
632 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
633 | ||
634 | /* Network I/O buffers */ | |
635 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
636 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
637 | ||
ca75d7de | 638 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 639 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 640 | |
641 | buffer_free(&m); | |
642 | } | |
643 | ||
644 | int | |
148de80c | 645 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
1853d1ef | 646 | { |
647 | Buffer m; | |
be2ca0c9 | 648 | char *p, *msg; |
1853d1ef | 649 | int success = 0; |
650 | ||
651 | buffer_init(&m); | |
b5a28cbc | 652 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 653 | |
1588c277 | 654 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 655 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 656 | |
657 | success = buffer_get_int(&m); | |
658 | if (success == 0) { | |
1588c277 | 659 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 660 | buffer_free(&m); |
661 | return (0); | |
662 | } | |
663 | p = buffer_get_string(&m, NULL); | |
be2ca0c9 | 664 | msg = buffer_get_string(&m, NULL); |
1853d1ef | 665 | buffer_free(&m); |
666 | ||
667 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
668 | xfree(p); | |
669 | ||
be2ca0c9 | 670 | buffer_append(&loginmsg, msg, strlen(msg)); |
671 | xfree(msg); | |
672 | ||
b5a28cbc | 673 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
674 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 675 | |
676 | /* Success */ | |
677 | return (1); | |
678 | } | |
679 | ||
680 | void | |
2362db19 | 681 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 682 | { |
1853d1ef | 683 | Buffer m; |
684 | ||
685 | if (s->ttyfd == -1) | |
686 | return; | |
687 | buffer_init(&m); | |
688 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 689 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 690 | buffer_free(&m); |
691 | ||
692 | /* closed dup'ed master */ | |
693 | if (close(s->ptymaster) < 0) | |
694 | error("close(s->ptymaster): %s", strerror(errno)); | |
695 | ||
696 | /* unlink pty from session */ | |
697 | s->ttyfd = -1; | |
698 | } | |
699 | ||
ad200abb | 700 | #ifdef USE_PAM |
701 | void | |
529d73ab | 702 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 703 | { |
704 | Buffer m; | |
705 | ||
1588c277 | 706 | debug3("%s entering", __func__); |
7fceb20d | 707 | if (!options.use_pam) |
708 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 709 | |
710 | buffer_init(&m); | |
b5a28cbc | 711 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 712 | |
713 | buffer_free(&m); | |
714 | } | |
05114c74 | 715 | |
5b9e2464 | 716 | u_int |
717 | mm_do_pam_account(void) | |
718 | { | |
719 | Buffer m; | |
720 | u_int ret; | |
ba6dd90e | 721 | char *msg; |
5b9e2464 | 722 | |
723 | debug3("%s entering", __func__); | |
724 | if (!options.use_pam) | |
725 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
726 | ||
727 | buffer_init(&m); | |
728 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
729 | ||
aff51935 | 730 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 731 | MONITOR_ANS_PAM_ACCOUNT, &m); |
732 | ret = buffer_get_int(&m); | |
ba6dd90e | 733 | msg = buffer_get_string(&m, NULL); |
734 | buffer_append(&loginmsg, msg, strlen(msg)); | |
735 | xfree(msg); | |
5b9e2464 | 736 | |
737 | buffer_free(&m); | |
b6453d99 | 738 | |
5b9e2464 | 739 | debug3("%s returning %d", __func__, ret); |
740 | ||
741 | return (ret); | |
742 | } | |
743 | ||
05114c74 | 744 | void * |
745 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
746 | { | |
747 | Buffer m; | |
748 | int success; | |
749 | ||
750 | debug3("%s", __func__); | |
751 | buffer_init(&m); | |
752 | buffer_put_cstring(&m, authctxt->user); | |
753 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
754 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
755 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
756 | success = buffer_get_int(&m); | |
757 | if (success == 0) { | |
758 | debug3("%s: pam_init_ctx failed", __func__); | |
759 | buffer_free(&m); | |
760 | return (NULL); | |
761 | } | |
762 | buffer_free(&m); | |
763 | return (authctxt); | |
764 | } | |
765 | ||
766 | int | |
767 | mm_sshpam_query(void *ctx, char **name, char **info, | |
768 | u_int *num, char ***prompts, u_int **echo_on) | |
769 | { | |
770 | Buffer m; | |
a1a073cc | 771 | u_int i; |
772 | int ret; | |
05114c74 | 773 | |
774 | debug3("%s", __func__); | |
775 | buffer_init(&m); | |
776 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
777 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
778 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
779 | ret = buffer_get_int(&m); | |
780 | debug3("%s: pam_query returned %d", __func__, ret); | |
781 | *name = buffer_get_string(&m, NULL); | |
782 | *info = buffer_get_string(&m, NULL); | |
783 | *num = buffer_get_int(&m); | |
01d35895 | 784 | if (*num > PAM_MAX_NUM_MSG) |
785 | fatal("%s: recieved %u PAM messages, expected <= %u", | |
786 | __func__, *num, PAM_MAX_NUM_MSG); | |
787 | *prompts = xcalloc((*num + 1), sizeof(char *)); | |
788 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); | |
05114c74 | 789 | for (i = 0; i < *num; ++i) { |
790 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
791 | (*echo_on)[i] = buffer_get_int(&m); | |
792 | } | |
793 | buffer_free(&m); | |
794 | return (ret); | |
795 | } | |
796 | ||
797 | int | |
798 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
799 | { | |
800 | Buffer m; | |
a1a073cc | 801 | u_int i; |
802 | int ret; | |
05114c74 | 803 | |
804 | debug3("%s", __func__); | |
805 | buffer_init(&m); | |
806 | buffer_put_int(&m, num); | |
807 | for (i = 0; i < num; ++i) | |
808 | buffer_put_cstring(&m, resp[i]); | |
809 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
810 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
811 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
812 | ret = buffer_get_int(&m); | |
813 | debug3("%s: pam_respond returned %d", __func__, ret); | |
814 | buffer_free(&m); | |
815 | return (ret); | |
816 | } | |
817 | ||
818 | void | |
819 | mm_sshpam_free_ctx(void *ctxtp) | |
820 | { | |
821 | Buffer m; | |
822 | ||
823 | debug3("%s", __func__); | |
824 | buffer_init(&m); | |
825 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
826 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
827 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
828 | buffer_free(&m); | |
829 | } | |
ad200abb | 830 | #endif /* USE_PAM */ |
831 | ||
1853d1ef | 832 | /* Request process termination */ |
833 | ||
834 | void | |
835 | mm_terminate(void) | |
836 | { | |
837 | Buffer m; | |
838 | ||
839 | buffer_init(&m); | |
b5a28cbc | 840 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 841 | buffer_free(&m); |
842 | } | |
843 | ||
844 | int | |
845 | mm_ssh1_session_key(BIGNUM *num) | |
846 | { | |
847 | int rsafail; | |
848 | Buffer m; | |
849 | ||
850 | buffer_init(&m); | |
851 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 852 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 853 | |
b5a28cbc | 854 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 855 | |
856 | rsafail = buffer_get_int(&m); | |
857 | buffer_get_bignum2(&m, num); | |
858 | ||
859 | buffer_free(&m); | |
860 | ||
861 | return (rsafail); | |
862 | } | |
863 | ||
864 | static void | |
865 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
866 | char ***prompts, u_int **echo_on) | |
867 | { | |
7203d6bb | 868 | *name = xstrdup(""); |
869 | *infotxt = xstrdup(""); | |
1853d1ef | 870 | *numprompts = 1; |
52e3daed | 871 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
872 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
1853d1ef | 873 | (*echo_on)[0] = 0; |
874 | } | |
875 | ||
876 | int | |
877 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
878 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
879 | { | |
880 | Buffer m; | |
6d6c25e3 | 881 | u_int success; |
1853d1ef | 882 | char *challenge; |
883 | ||
1588c277 | 884 | debug3("%s: entering", __func__); |
1853d1ef | 885 | |
886 | buffer_init(&m); | |
b5a28cbc | 887 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 888 | |
b5a28cbc | 889 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 890 | &m); |
6d6c25e3 | 891 | success = buffer_get_int(&m); |
892 | if (success == 0) { | |
1588c277 | 893 | debug3("%s: no challenge", __func__); |
1853d1ef | 894 | buffer_free(&m); |
895 | return (-1); | |
896 | } | |
897 | ||
898 | /* Get the challenge, and format the response */ | |
899 | challenge = buffer_get_string(&m, NULL); | |
900 | buffer_free(&m); | |
901 | ||
902 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
903 | (*prompts)[0] = challenge; | |
904 | ||
1588c277 | 905 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 906 | |
907 | return (0); | |
908 | } | |
909 | ||
910 | int | |
911 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
912 | { | |
913 | Buffer m; | |
914 | int authok; | |
915 | ||
1588c277 | 916 | debug3("%s: entering", __func__); |
1853d1ef | 917 | if (numresponses != 1) |
918 | return (-1); | |
919 | ||
920 | buffer_init(&m); | |
921 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 922 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 923 | |
b5a28cbc | 924 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 925 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
926 | ||
927 | authok = buffer_get_int(&m); | |
928 | buffer_free(&m); | |
929 | ||
930 | return ((authok == 0) ? -1 : 0); | |
931 | } | |
932 | ||
77751377 | 933 | #ifdef SKEY |
1853d1ef | 934 | int |
935 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
936 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
937 | { | |
938 | Buffer m; | |
6d6c25e3 | 939 | int len; |
940 | u_int success; | |
1853d1ef | 941 | char *p, *challenge; |
942 | ||
1588c277 | 943 | debug3("%s: entering", __func__); |
1853d1ef | 944 | |
945 | buffer_init(&m); | |
b5a28cbc | 946 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 947 | |
b5a28cbc | 948 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 949 | &m); |
6d6c25e3 | 950 | success = buffer_get_int(&m); |
951 | if (success == 0) { | |
1588c277 | 952 | debug3("%s: no challenge", __func__); |
1853d1ef | 953 | buffer_free(&m); |
954 | return (-1); | |
955 | } | |
956 | ||
957 | /* Get the challenge, and format the response */ | |
958 | challenge = buffer_get_string(&m, NULL); | |
959 | buffer_free(&m); | |
960 | ||
1588c277 | 961 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 962 | |
963 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
964 | ||
52e3daed | 965 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
1853d1ef | 966 | xfree(challenge); |
967 | ||
968 | return (0); | |
969 | } | |
970 | ||
971 | int | |
972 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
973 | { | |
974 | Buffer m; | |
975 | int authok; | |
976 | ||
1588c277 | 977 | debug3("%s: entering", __func__); |
1853d1ef | 978 | if (numresponses != 1) |
979 | return (-1); | |
980 | ||
981 | buffer_init(&m); | |
982 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 983 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 984 | |
b5a28cbc | 985 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 986 | MONITOR_ANS_SKEYRESPOND, &m); |
987 | ||
988 | authok = buffer_get_int(&m); | |
989 | buffer_free(&m); | |
990 | ||
991 | return ((authok == 0) ? -1 : 0); | |
992 | } | |
77751377 | 993 | #endif /* SKEY */ |
1853d1ef | 994 | |
995 | void | |
996 | mm_ssh1_session_id(u_char session_id[16]) | |
997 | { | |
998 | Buffer m; | |
999 | int i; | |
1000 | ||
1588c277 | 1001 | debug3("%s entering", __func__); |
1853d1ef | 1002 | |
1003 | buffer_init(&m); | |
1004 | for (i = 0; i < 16; i++) | |
1005 | buffer_put_char(&m, session_id[i]); | |
1006 | ||
b5a28cbc | 1007 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 1008 | buffer_free(&m); |
1009 | } | |
1010 | ||
1011 | int | |
1012 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1013 | { | |
1014 | Buffer m; | |
1015 | Key *key; | |
1016 | u_char *blob; | |
1017 | u_int blen; | |
92e15201 | 1018 | int allowed = 0, have_forced = 0; |
1853d1ef | 1019 | |
1588c277 | 1020 | debug3("%s entering", __func__); |
1853d1ef | 1021 | |
1022 | buffer_init(&m); | |
1023 | buffer_put_bignum2(&m, client_n); | |
1024 | ||
b5a28cbc | 1025 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1026 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1027 | |
1028 | allowed = buffer_get_int(&m); | |
1029 | ||
92e15201 | 1030 | /* fake forced command */ |
1031 | auth_clear_options(); | |
1032 | have_forced = buffer_get_int(&m); | |
1033 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1034 | ||
1853d1ef | 1035 | if (allowed && rkey != NULL) { |
1036 | blob = buffer_get_string(&m, &blen); | |
1037 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1038 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1039 | *rkey = key; |
1040 | xfree(blob); | |
1041 | } | |
1042 | mm_send_debug(&m); | |
1043 | buffer_free(&m); | |
1044 | ||
1045 | return (allowed); | |
1046 | } | |
1047 | ||
1048 | BIGNUM * | |
1049 | mm_auth_rsa_generate_challenge(Key *key) | |
1050 | { | |
1051 | Buffer m; | |
1052 | BIGNUM *challenge; | |
1053 | u_char *blob; | |
1054 | u_int blen; | |
1055 | ||
1588c277 | 1056 | debug3("%s entering", __func__); |
1853d1ef | 1057 | |
1058 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1059 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1060 | |
1061 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1062 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1063 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1064 | key->type = KEY_RSA1; |
1065 | ||
1066 | buffer_init(&m); | |
1067 | buffer_put_string(&m, blob, blen); | |
1068 | xfree(blob); | |
1069 | ||
b5a28cbc | 1070 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1071 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1072 | |
1073 | buffer_get_bignum2(&m, challenge); | |
1074 | buffer_free(&m); | |
1075 | ||
1076 | return (challenge); | |
1077 | } | |
1078 | ||
1079 | int | |
1080 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1081 | { | |
1082 | Buffer m; | |
1083 | u_char *blob; | |
1084 | u_int blen; | |
1085 | int success = 0; | |
1086 | ||
1588c277 | 1087 | debug3("%s entering", __func__); |
1853d1ef | 1088 | |
1089 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1090 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1091 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1092 | key->type = KEY_RSA1; |
1093 | ||
1094 | buffer_init(&m); | |
1095 | buffer_put_string(&m, blob, blen); | |
1096 | buffer_put_string(&m, response, 16); | |
1097 | xfree(blob); | |
1098 | ||
b5a28cbc | 1099 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1100 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1101 | |
1102 | success = buffer_get_int(&m); | |
1103 | buffer_free(&m); | |
1104 | ||
1105 | return (success); | |
1106 | } | |
696f6bef | 1107 | |
6039eeef | 1108 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 1109 | void |
1110 | mm_audit_event(ssh_audit_event_t event) | |
1111 | { | |
1112 | Buffer m; | |
1113 | ||
1114 | debug3("%s entering", __func__); | |
1115 | ||
1116 | buffer_init(&m); | |
1117 | buffer_put_int(&m, event); | |
1118 | ||
1119 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1120 | buffer_free(&m); | |
1121 | } | |
1122 | ||
1123 | void | |
1124 | mm_audit_run_command(const char *command) | |
1125 | { | |
1126 | Buffer m; | |
1127 | ||
1128 | debug3("%s entering command %s", __func__, command); | |
1129 | ||
1130 | buffer_init(&m); | |
1131 | buffer_put_cstring(&m, command); | |
1132 | ||
1133 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1134 | buffer_free(&m); | |
1135 | } | |
6039eeef | 1136 | #endif /* SSH_AUDIT_EVENTS */ |
c00e4d75 | 1137 | |
7364bd04 | 1138 | #ifdef GSSAPI |
1139 | OM_uint32 | |
ca75d7de | 1140 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1141 | { |
1142 | Buffer m; | |
1143 | OM_uint32 major; | |
1144 | ||
1145 | /* Client doesn't get to see the context */ | |
1146 | *ctx = NULL; | |
1147 | ||
1148 | buffer_init(&m); | |
ca75d7de | 1149 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1150 | |
1151 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1152 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1153 | ||
1154 | major = buffer_get_int(&m); | |
1155 | ||
1156 | buffer_free(&m); | |
1157 | return (major); | |
1158 | } | |
1159 | ||
1160 | OM_uint32 | |
1161 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1162 | gss_buffer_desc *out, OM_uint32 *flags) | |
1163 | { | |
1164 | Buffer m; | |
1165 | OM_uint32 major; | |
f99e1ca4 | 1166 | u_int len; |
7364bd04 | 1167 | |
1168 | buffer_init(&m); | |
1169 | buffer_put_string(&m, in->value, in->length); | |
1170 | ||
1171 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1172 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1173 | ||
1174 | major = buffer_get_int(&m); | |
f99e1ca4 | 1175 | out->value = buffer_get_string(&m, &len); |
1176 | out->length = len; | |
7364bd04 | 1177 | if (flags) |
1178 | *flags = buffer_get_int(&m); | |
1179 | ||
1180 | buffer_free(&m); | |
1181 | ||
1182 | return (major); | |
1183 | } | |
1184 | ||
0789992b | 1185 | OM_uint32 |
1186 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1187 | { | |
1188 | Buffer m; | |
1189 | OM_uint32 major; | |
1190 | ||
1191 | buffer_init(&m); | |
1192 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1193 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1194 | ||
1195 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1196 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1197 | &m); | |
1198 | ||
1199 | major = buffer_get_int(&m); | |
1200 | buffer_free(&m); | |
1201 | return(major); | |
1202 | } | |
1203 | ||
7364bd04 | 1204 | int |
1205 | mm_ssh_gssapi_userok(char *user) | |
1206 | { | |
1207 | Buffer m; | |
1208 | int authenticated = 0; | |
1209 | ||
1210 | buffer_init(&m); | |
1211 | ||
1212 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1213 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1214 | &m); | |
1215 | ||
1216 | authenticated = buffer_get_int(&m); | |
1217 | ||
1218 | buffer_free(&m); | |
1219 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1220 | return (authenticated); | |
1221 | } | |
1222 | #endif /* GSSAPI */ |