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5156b1a1 | 1 | /* $OpenBSD: monitor_wrap.c,v 1.63 2008/07/10 18:08:11 markus Exp $ */ |
826f3a39 | 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" | |
30460aeb | 29 | |
30 | #include <sys/types.h> | |
31 | #include <sys/uio.h> | |
32 | ||
33 | #include <errno.h> | |
34 | #include <pwd.h> | |
35 | #include <signal.h> | |
36 | #include <stdarg.h> | |
37 | #include <stdio.h> | |
38 | #include <string.h> | |
39 | #include <unistd.h> | |
826f3a39 | 40 | |
41 | #include <openssl/bn.h> | |
42 | #include <openssl/dh.h> | |
43 | ||
5156b1a1 | 44 | #include "openbsd-compat/sys-queue.h" |
30460aeb | 45 | #include "xmalloc.h" |
826f3a39 | 46 | #include "ssh.h" |
47 | #include "dh.h" | |
30460aeb | 48 | #include "buffer.h" |
49 | #include "key.h" | |
50 | #include "cipher.h" | |
826f3a39 | 51 | #include "kex.h" |
30460aeb | 52 | #include "hostfile.h" |
826f3a39 | 53 | #include "auth.h" |
bfe49944 | 54 | #include "auth-options.h" |
826f3a39 | 55 | #include "packet.h" |
56 | #include "mac.h" | |
57 | #include "log.h" | |
12a403af | 58 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
59 | #undef TARGET_OS_MAC | |
826f3a39 | 60 | #include "zlib.h" |
12a403af | 61 | #define TARGET_OS_MAC 1 |
62 | #else | |
63 | #include "zlib.h" | |
64 | #endif | |
826f3a39 | 65 | #include "monitor.h" |
30460aeb | 66 | #ifdef GSSAPI |
67 | #include "ssh-gss.h" | |
68 | #endif | |
826f3a39 | 69 | #include "monitor_wrap.h" |
826f3a39 | 70 | #include "atomicio.h" |
71 | #include "monitor_fdpass.h" | |
30460aeb | 72 | #include "misc.h" |
7cac2b65 | 73 | #include "servconf.h" |
826f3a39 | 74 | |
826f3a39 | 75 | #include "channels.h" |
76 | #include "session.h" | |
0b90ac93 | 77 | #include "servconf.h" |
826f3a39 | 78 | |
79 | /* Imports */ | |
80 | extern int compat20; | |
81 | extern Newkeys *newkeys[]; | |
82 | extern z_stream incoming_stream; | |
83 | extern z_stream outgoing_stream; | |
84 | extern struct monitor *pmonitor; | |
85 | extern Buffer input, output; | |
7e82606e | 86 | extern Buffer loginmsg; |
7cac2b65 | 87 | extern ServerOptions options; |
826f3a39 | 88 | |
540d72c3 | 89 | int |
90 | mm_is_monitor(void) | |
91 | { | |
92 | /* | |
93 | * m_pid is only set in the privileged part, and | |
94 | * points to the unprivileged child. | |
95 | */ | |
96 | return (pmonitor && pmonitor->m_pid > 0); | |
97 | } | |
98 | ||
826f3a39 | 99 | void |
7e82606e | 100 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
826f3a39 | 101 | { |
826f3a39 | 102 | u_int mlen = buffer_len(m); |
d03f4262 | 103 | u_char buf[5]; |
826f3a39 | 104 | |
44a053a3 | 105 | debug3("%s entering: type %d", __func__, type); |
826f3a39 | 106 | |
30460aeb | 107 | put_u32(buf, mlen + 1); |
44a053a3 | 108 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
7e82606e | 109 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
2ce0bfe4 | 110 | fatal("%s: write: %s", __func__, strerror(errno)); |
7e82606e | 111 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
2ce0bfe4 | 112 | fatal("%s: write: %s", __func__, strerror(errno)); |
826f3a39 | 113 | } |
114 | ||
115 | void | |
7e82606e | 116 | mm_request_receive(int sock, Buffer *m) |
826f3a39 | 117 | { |
118 | u_char buf[4]; | |
826f3a39 | 119 | u_int msg_len; |
120 | ||
44a053a3 | 121 | debug3("%s entering", __func__); |
826f3a39 | 122 | |
2ce0bfe4 | 123 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
124 | if (errno == EPIPE) | |
540d72c3 | 125 | cleanup_exit(255); |
2ce0bfe4 | 126 | fatal("%s: read: %s", __func__, strerror(errno)); |
826f3a39 | 127 | } |
30460aeb | 128 | msg_len = get_u32(buf); |
826f3a39 | 129 | if (msg_len > 256 * 1024) |
44a053a3 | 130 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
826f3a39 | 131 | buffer_clear(m); |
132 | buffer_append_space(m, msg_len); | |
2ce0bfe4 | 133 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
134 | fatal("%s: read: %s", __func__, strerror(errno)); | |
826f3a39 | 135 | } |
136 | ||
137 | void | |
7e82606e | 138 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
826f3a39 | 139 | { |
140 | u_char rtype; | |
141 | ||
44a053a3 | 142 | debug3("%s entering: type %d", __func__, type); |
826f3a39 | 143 | |
7e82606e | 144 | mm_request_receive(sock, m); |
826f3a39 | 145 | rtype = buffer_get_char(m); |
146 | if (rtype != type) | |
44a053a3 | 147 | fatal("%s: read: rtype %d != type %d", __func__, |
826f3a39 | 148 | rtype, type); |
149 | } | |
150 | ||
151 | DH * | |
152 | mm_choose_dh(int min, int nbits, int max) | |
153 | { | |
154 | BIGNUM *p, *g; | |
155 | int success = 0; | |
156 | Buffer m; | |
157 | ||
158 | buffer_init(&m); | |
159 | buffer_put_int(&m, min); | |
160 | buffer_put_int(&m, nbits); | |
161 | buffer_put_int(&m, max); | |
162 | ||
163 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); | |
164 | ||
44a053a3 | 165 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
826f3a39 | 166 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
167 | ||
168 | success = buffer_get_char(&m); | |
169 | if (success == 0) | |
44a053a3 | 170 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
826f3a39 | 171 | |
172 | if ((p = BN_new()) == NULL) | |
44a053a3 | 173 | fatal("%s: BN_new failed", __func__); |
826f3a39 | 174 | if ((g = BN_new()) == NULL) |
44a053a3 | 175 | fatal("%s: BN_new failed", __func__); |
826f3a39 | 176 | buffer_get_bignum2(&m, p); |
177 | buffer_get_bignum2(&m, g); | |
178 | ||
44a053a3 | 179 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
826f3a39 | 180 | buffer_free(&m); |
181 | ||
182 | return (dh_new_group(g, p)); | |
183 | } | |
184 | ||
185 | int | |
186 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
187 | { | |
188 | Kex *kex = *pmonitor->m_pkex; | |
189 | Buffer m; | |
190 | ||
44a053a3 | 191 | debug3("%s entering", __func__); |
826f3a39 | 192 | |
193 | buffer_init(&m); | |
194 | buffer_put_int(&m, kex->host_key_index(key)); | |
195 | buffer_put_string(&m, data, datalen); | |
196 | ||
197 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); | |
198 | ||
44a053a3 | 199 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
826f3a39 | 200 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
201 | *sigp = buffer_get_string(&m, lenp); | |
202 | buffer_free(&m); | |
203 | ||
204 | return (0); | |
205 | } | |
206 | ||
207 | struct passwd * | |
7e82606e | 208 | mm_getpwnamallow(const char *username) |
826f3a39 | 209 | { |
210 | Buffer m; | |
211 | struct passwd *pw; | |
0b90ac93 | 212 | u_int len; |
213 | ServerOptions *newopts; | |
826f3a39 | 214 | |
44a053a3 | 215 | debug3("%s entering", __func__); |
826f3a39 | 216 | |
217 | buffer_init(&m); | |
7e82606e | 218 | buffer_put_cstring(&m, username); |
826f3a39 | 219 | |
220 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); | |
221 | ||
44a053a3 | 222 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
826f3a39 | 223 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
224 | ||
225 | if (buffer_get_char(&m) == 0) { | |
e74dc197 | 226 | pw = NULL; |
227 | goto out; | |
826f3a39 | 228 | } |
0b90ac93 | 229 | pw = buffer_get_string(&m, &len); |
230 | if (len != sizeof(struct passwd)) | |
44a053a3 | 231 | fatal("%s: struct passwd size mismatch", __func__); |
826f3a39 | 232 | pw->pw_name = buffer_get_string(&m, NULL); |
233 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
234 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
235 | #ifdef HAVE_PW_CLASS_IN_PASSWD | |
236 | pw->pw_class = buffer_get_string(&m, NULL); | |
237 | #endif | |
238 | pw->pw_dir = buffer_get_string(&m, NULL); | |
239 | pw->pw_shell = buffer_get_string(&m, NULL); | |
0b90ac93 | 240 | |
e74dc197 | 241 | out: |
0b90ac93 | 242 | /* copy options block as a Match directive may have changed some */ |
243 | newopts = buffer_get_string(&m, &len); | |
244 | if (len != sizeof(*newopts)) | |
245 | fatal("%s: option block size mismatch", __func__); | |
246 | if (newopts->banner != NULL) | |
247 | newopts->banner = buffer_get_string(&m, NULL); | |
248 | copy_set_server_options(&options, newopts, 1); | |
249 | xfree(newopts); | |
250 | ||
826f3a39 | 251 | buffer_free(&m); |
252 | ||
253 | return (pw); | |
254 | } | |
255 | ||
540d72c3 | 256 | char * |
257 | mm_auth2_read_banner(void) | |
826f3a39 | 258 | { |
259 | Buffer m; | |
260 | char *banner; | |
261 | ||
44a053a3 | 262 | debug3("%s entering", __func__); |
826f3a39 | 263 | |
264 | buffer_init(&m); | |
265 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); | |
266 | buffer_clear(&m); | |
267 | ||
540d72c3 | 268 | mm_request_receive_expect(pmonitor->m_recvfd, |
269 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
826f3a39 | 270 | banner = buffer_get_string(&m, NULL); |
271 | buffer_free(&m); | |
44a053a3 | 272 | |
540d72c3 | 273 | /* treat empty banner as missing banner */ |
274 | if (strlen(banner) == 0) { | |
275 | xfree(banner); | |
276 | banner = NULL; | |
277 | } | |
826f3a39 | 278 | return (banner); |
279 | } | |
280 | ||
281 | /* Inform the privileged process about service and style */ | |
282 | ||
283 | void | |
284 | mm_inform_authserv(char *service, char *style) | |
285 | { | |
286 | Buffer m; | |
287 | ||
44a053a3 | 288 | debug3("%s entering", __func__); |
826f3a39 | 289 | |
290 | buffer_init(&m); | |
291 | buffer_put_cstring(&m, service); | |
292 | buffer_put_cstring(&m, style ? style : ""); | |
293 | ||
294 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); | |
295 | ||
296 | buffer_free(&m); | |
297 | } | |
298 | ||
299 | /* Do the password authentication */ | |
300 | int | |
301 | mm_auth_password(Authctxt *authctxt, char *password) | |
302 | { | |
303 | Buffer m; | |
304 | int authenticated = 0; | |
305 | ||
44a053a3 | 306 | debug3("%s entering", __func__); |
826f3a39 | 307 | |
308 | buffer_init(&m); | |
309 | buffer_put_cstring(&m, password); | |
310 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); | |
311 | ||
44a053a3 | 312 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
826f3a39 | 313 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
314 | ||
315 | authenticated = buffer_get_int(&m); | |
316 | ||
317 | buffer_free(&m); | |
318 | ||
319 | debug3("%s: user %sauthenticated", | |
44a053a3 | 320 | __func__, authenticated ? "" : "not "); |
826f3a39 | 321 | return (authenticated); |
322 | } | |
323 | ||
324 | int | |
325 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
326 | { | |
327 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
328 | } | |
329 | ||
330 | int | |
331 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
332 | Key *key) | |
333 | { | |
334 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
335 | } | |
336 | ||
337 | int | |
338 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
339 | char *host, Key *key) | |
340 | { | |
341 | int ret; | |
342 | ||
343 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
344 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
345 | key->type = KEY_RSA1; | |
346 | return (ret); | |
347 | } | |
348 | ||
349 | static void | |
350 | mm_send_debug(Buffer *m) | |
351 | { | |
352 | char *msg; | |
353 | ||
354 | while (buffer_len(m)) { | |
355 | msg = buffer_get_string(m, NULL); | |
44a053a3 | 356 | debug3("%s: Sending debug: %s", __func__, msg); |
826f3a39 | 357 | packet_send_debug("%s", msg); |
358 | xfree(msg); | |
359 | } | |
360 | } | |
361 | ||
362 | int | |
363 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
364 | { | |
365 | Buffer m; | |
366 | u_char *blob; | |
367 | u_int len; | |
bfe49944 | 368 | int allowed = 0, have_forced = 0; |
826f3a39 | 369 | |
44a053a3 | 370 | debug3("%s entering", __func__); |
826f3a39 | 371 | |
372 | /* Convert the key to a blob and the pass it over */ | |
373 | if (!key_to_blob(key, &blob, &len)) | |
374 | return (0); | |
375 | ||
376 | buffer_init(&m); | |
377 | buffer_put_int(&m, type); | |
378 | buffer_put_cstring(&m, user ? user : ""); | |
379 | buffer_put_cstring(&m, host ? host : ""); | |
380 | buffer_put_string(&m, blob, len); | |
381 | xfree(blob); | |
382 | ||
383 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); | |
384 | ||
44a053a3 | 385 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
826f3a39 | 386 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
387 | ||
388 | allowed = buffer_get_int(&m); | |
389 | ||
bfe49944 | 390 | /* fake forced command */ |
391 | auth_clear_options(); | |
392 | have_forced = buffer_get_int(&m); | |
393 | forced_command = have_forced ? xstrdup("true") : NULL; | |
394 | ||
826f3a39 | 395 | /* Send potential debug messages */ |
396 | mm_send_debug(&m); | |
397 | ||
398 | buffer_free(&m); | |
399 | ||
400 | return (allowed); | |
401 | } | |
402 | ||
403 | /* | |
404 | * This key verify needs to send the key type along, because the | |
405 | * privileged parent makes the decision if the key is allowed | |
406 | * for authentication. | |
407 | */ | |
408 | ||
409 | int | |
410 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
411 | { | |
412 | Buffer m; | |
413 | u_char *blob; | |
414 | u_int len; | |
415 | int verified = 0; | |
416 | ||
44a053a3 | 417 | debug3("%s entering", __func__); |
826f3a39 | 418 | |
419 | /* Convert the key to a blob and the pass it over */ | |
420 | if (!key_to_blob(key, &blob, &len)) | |
421 | return (0); | |
422 | ||
423 | buffer_init(&m); | |
424 | buffer_put_string(&m, blob, len); | |
425 | buffer_put_string(&m, sig, siglen); | |
426 | buffer_put_string(&m, data, datalen); | |
427 | xfree(blob); | |
428 | ||
429 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); | |
430 | ||
44a053a3 | 431 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
826f3a39 | 432 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
433 | ||
434 | verified = buffer_get_int(&m); | |
435 | ||
436 | buffer_free(&m); | |
437 | ||
438 | return (verified); | |
439 | } | |
440 | ||
441 | /* Export key state after authentication */ | |
442 | Newkeys * | |
443 | mm_newkeys_from_blob(u_char *blob, int blen) | |
444 | { | |
445 | Buffer b; | |
446 | u_int len; | |
447 | Newkeys *newkey = NULL; | |
448 | Enc *enc; | |
449 | Mac *mac; | |
450 | Comp *comp; | |
451 | ||
44a053a3 | 452 | debug3("%s: %p(%d)", __func__, blob, blen); |
826f3a39 | 453 | #ifdef DEBUG_PK |
454 | dump_base64(stderr, blob, blen); | |
455 | #endif | |
456 | buffer_init(&b); | |
457 | buffer_append(&b, blob, blen); | |
458 | ||
459 | newkey = xmalloc(sizeof(*newkey)); | |
460 | enc = &newkey->enc; | |
461 | mac = &newkey->mac; | |
462 | comp = &newkey->comp; | |
463 | ||
464 | /* Enc structure */ | |
465 | enc->name = buffer_get_string(&b, NULL); | |
466 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
467 | enc->enabled = buffer_get_int(&b); | |
468 | enc->block_size = buffer_get_int(&b); | |
469 | enc->key = buffer_get_string(&b, &enc->key_len); | |
470 | enc->iv = buffer_get_string(&b, &len); | |
471 | if (len != enc->block_size) | |
d03f4262 | 472 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
826f3a39 | 473 | enc->block_size, len); |
474 | ||
475 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
44a053a3 | 476 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
826f3a39 | 477 | enc->name, enc->cipher); |
478 | ||
479 | /* Mac structure */ | |
480 | mac->name = buffer_get_string(&b, NULL); | |
fa0f0f45 | 481 | if (mac->name == NULL || mac_setup(mac, mac->name) == -1) |
482 | fatal("%s: can not setup mac %s", __func__, mac->name); | |
826f3a39 | 483 | mac->enabled = buffer_get_int(&b); |
484 | mac->key = buffer_get_string(&b, &len); | |
485 | if (len > mac->key_len) | |
d03f4262 | 486 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
826f3a39 | 487 | mac->key_len); |
488 | mac->key_len = len; | |
489 | ||
490 | /* Comp structure */ | |
491 | comp->type = buffer_get_int(&b); | |
492 | comp->enabled = buffer_get_int(&b); | |
493 | comp->name = buffer_get_string(&b, NULL); | |
494 | ||
495 | len = buffer_len(&b); | |
496 | if (len != 0) | |
d03f4262 | 497 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
826f3a39 | 498 | buffer_free(&b); |
499 | return (newkey); | |
500 | } | |
501 | ||
502 | int | |
503 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
504 | { | |
505 | Buffer b; | |
506 | int len; | |
826f3a39 | 507 | Enc *enc; |
508 | Mac *mac; | |
509 | Comp *comp; | |
510 | Newkeys *newkey = newkeys[mode]; | |
511 | ||
44a053a3 | 512 | debug3("%s: converting %p", __func__, newkey); |
826f3a39 | 513 | |
514 | if (newkey == NULL) { | |
44a053a3 | 515 | error("%s: newkey == NULL", __func__); |
826f3a39 | 516 | return 0; |
517 | } | |
518 | enc = &newkey->enc; | |
519 | mac = &newkey->mac; | |
520 | comp = &newkey->comp; | |
521 | ||
522 | buffer_init(&b); | |
523 | /* Enc structure */ | |
524 | buffer_put_cstring(&b, enc->name); | |
525 | /* The cipher struct is constant and shared, you export pointer */ | |
526 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
527 | buffer_put_int(&b, enc->enabled); | |
528 | buffer_put_int(&b, enc->block_size); | |
529 | buffer_put_string(&b, enc->key, enc->key_len); | |
530 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
531 | buffer_put_string(&b, enc->iv, enc->block_size); | |
532 | ||
533 | /* Mac structure */ | |
534 | buffer_put_cstring(&b, mac->name); | |
535 | buffer_put_int(&b, mac->enabled); | |
536 | buffer_put_string(&b, mac->key, mac->key_len); | |
537 | ||
538 | /* Comp structure */ | |
539 | buffer_put_int(&b, comp->type); | |
540 | buffer_put_int(&b, comp->enabled); | |
541 | buffer_put_cstring(&b, comp->name); | |
542 | ||
543 | len = buffer_len(&b); | |
826f3a39 | 544 | if (lenp != NULL) |
545 | *lenp = len; | |
d03f4262 | 546 | if (blobp != NULL) { |
547 | *blobp = xmalloc(len); | |
548 | memcpy(*blobp, buffer_ptr(&b), len); | |
549 | } | |
550 | memset(buffer_ptr(&b), 0, len); | |
551 | buffer_free(&b); | |
826f3a39 | 552 | return len; |
553 | } | |
554 | ||
555 | static void | |
556 | mm_send_kex(Buffer *m, Kex *kex) | |
557 | { | |
558 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
559 | buffer_put_int(m, kex->we_need); | |
560 | buffer_put_int(m, kex->hostkey_type); | |
561 | buffer_put_int(m, kex->kex_type); | |
562 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
563 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
564 | buffer_put_int(m, kex->flags); | |
565 | buffer_put_cstring(m, kex->client_version_string); | |
566 | buffer_put_cstring(m, kex->server_version_string); | |
567 | } | |
568 | ||
569 | void | |
7e82606e | 570 | mm_send_keystate(struct monitor *monitor) |
826f3a39 | 571 | { |
572 | Buffer m; | |
573 | u_char *blob, *p; | |
574 | u_int bloblen, plen; | |
7cac2b65 | 575 | u_int32_t seqnr, packets; |
5156b1a1 | 576 | u_int64_t blocks, bytes; |
826f3a39 | 577 | |
578 | buffer_init(&m); | |
579 | ||
580 | if (!compat20) { | |
581 | u_char iv[24]; | |
44a053a3 | 582 | u_char *key; |
583 | u_int ivlen, keylen; | |
826f3a39 | 584 | |
585 | buffer_put_int(&m, packet_get_protocol_flags()); | |
586 | ||
587 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
588 | ||
44a053a3 | 589 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
590 | keylen = packet_get_encryption_key(NULL); | |
591 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
592 | keylen = packet_get_encryption_key(key); | |
593 | buffer_put_string(&m, key, keylen); | |
594 | memset(key, 0, keylen); | |
595 | xfree(key); | |
596 | ||
826f3a39 | 597 | ivlen = packet_get_keyiv_len(MODE_OUT); |
598 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
599 | buffer_put_string(&m, iv, ivlen); | |
600 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
601 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
602 | buffer_put_string(&m, iv, ivlen); | |
603 | goto skip; | |
604 | } else { | |
605 | /* Kex for rekeying */ | |
7e82606e | 606 | mm_send_kex(&m, *monitor->m_pkex); |
826f3a39 | 607 | } |
608 | ||
609 | debug3("%s: Sending new keys: %p %p", | |
44a053a3 | 610 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
826f3a39 | 611 | |
612 | /* Keys from Kex */ | |
613 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
44a053a3 | 614 | fatal("%s: conversion of newkeys failed", __func__); |
826f3a39 | 615 | |
616 | buffer_put_string(&m, blob, bloblen); | |
617 | xfree(blob); | |
618 | ||
619 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
44a053a3 | 620 | fatal("%s: conversion of newkeys failed", __func__); |
826f3a39 | 621 | |
622 | buffer_put_string(&m, blob, bloblen); | |
623 | xfree(blob); | |
624 | ||
5156b1a1 | 625 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes); |
7cac2b65 | 626 | buffer_put_int(&m, seqnr); |
627 | buffer_put_int64(&m, blocks); | |
628 | buffer_put_int(&m, packets); | |
5156b1a1 | 629 | buffer_put_int64(&m, bytes); |
630 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes); | |
7cac2b65 | 631 | buffer_put_int(&m, seqnr); |
632 | buffer_put_int64(&m, blocks); | |
633 | buffer_put_int(&m, packets); | |
5156b1a1 | 634 | buffer_put_int64(&m, bytes); |
826f3a39 | 635 | |
44a053a3 | 636 | debug3("%s: New keys have been sent", __func__); |
826f3a39 | 637 | skip: |
638 | /* More key context */ | |
639 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
640 | p = xmalloc(plen+1); | |
641 | packet_get_keycontext(MODE_OUT, p); | |
642 | buffer_put_string(&m, p, plen); | |
643 | xfree(p); | |
644 | ||
645 | plen = packet_get_keycontext(MODE_IN, NULL); | |
646 | p = xmalloc(plen+1); | |
647 | packet_get_keycontext(MODE_IN, p); | |
648 | buffer_put_string(&m, p, plen); | |
649 | xfree(p); | |
650 | ||
651 | /* Compression state */ | |
44a053a3 | 652 | debug3("%s: Sending compression state", __func__); |
826f3a39 | 653 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
654 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
655 | ||
656 | /* Network I/O buffers */ | |
657 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
658 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
659 | ||
7e82606e | 660 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
44a053a3 | 661 | debug3("%s: Finished sending state", __func__); |
826f3a39 | 662 | |
663 | buffer_free(&m); | |
664 | } | |
665 | ||
666 | int | |
30460aeb | 667 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
826f3a39 | 668 | { |
669 | Buffer m; | |
7e82606e | 670 | char *p, *msg; |
5156b1a1 | 671 | int success = 0, tmp1 = -1, tmp2 = -1; |
672 | ||
673 | /* Kludge: ensure there are fds free to receive the pty/tty */ | |
674 | if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 || | |
675 | (tmp2 = dup(pmonitor->m_recvfd)) == -1) { | |
676 | error("%s: cannot allocate fds for pty", __func__); | |
677 | if (tmp1 > 0) | |
678 | close(tmp1); | |
679 | if (tmp2 > 0) | |
680 | close(tmp2); | |
681 | return 0; | |
682 | } | |
683 | close(tmp1); | |
684 | close(tmp2); | |
826f3a39 | 685 | |
686 | buffer_init(&m); | |
687 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); | |
688 | ||
44a053a3 | 689 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
826f3a39 | 690 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
691 | ||
692 | success = buffer_get_int(&m); | |
693 | if (success == 0) { | |
44a053a3 | 694 | debug3("%s: pty alloc failed", __func__); |
826f3a39 | 695 | buffer_free(&m); |
696 | return (0); | |
697 | } | |
698 | p = buffer_get_string(&m, NULL); | |
7e82606e | 699 | msg = buffer_get_string(&m, NULL); |
826f3a39 | 700 | buffer_free(&m); |
701 | ||
702 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
703 | xfree(p); | |
704 | ||
7e82606e | 705 | buffer_append(&loginmsg, msg, strlen(msg)); |
706 | xfree(msg); | |
707 | ||
e74dc197 | 708 | if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || |
709 | (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) | |
710 | fatal("%s: receive fds failed", __func__); | |
826f3a39 | 711 | |
712 | /* Success */ | |
713 | return (1); | |
714 | } | |
715 | ||
716 | void | |
540d72c3 | 717 | mm_session_pty_cleanup2(Session *s) |
826f3a39 | 718 | { |
826f3a39 | 719 | Buffer m; |
720 | ||
721 | if (s->ttyfd == -1) | |
722 | return; | |
723 | buffer_init(&m); | |
724 | buffer_put_cstring(&m, s->tty); | |
725 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); | |
726 | buffer_free(&m); | |
727 | ||
728 | /* closed dup'ed master */ | |
5156b1a1 | 729 | if (s->ptymaster != -1 && close(s->ptymaster) < 0) |
730 | error("close(s->ptymaster/%d): %s", | |
731 | s->ptymaster, strerror(errno)); | |
826f3a39 | 732 | |
733 | /* unlink pty from session */ | |
734 | s->ttyfd = -1; | |
735 | } | |
736 | ||
737 | #ifdef USE_PAM | |
738 | void | |
12a403af | 739 | mm_start_pam(Authctxt *authctxt) |
826f3a39 | 740 | { |
741 | Buffer m; | |
742 | ||
44a053a3 | 743 | debug3("%s entering", __func__); |
7cac2b65 | 744 | if (!options.use_pam) |
745 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
826f3a39 | 746 | |
747 | buffer_init(&m); | |
826f3a39 | 748 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
749 | ||
750 | buffer_free(&m); | |
751 | } | |
7cac2b65 | 752 | |
753 | u_int | |
754 | mm_do_pam_account(void) | |
755 | { | |
756 | Buffer m; | |
757 | u_int ret; | |
dfddba3d | 758 | char *msg; |
7cac2b65 | 759 | |
760 | debug3("%s entering", __func__); | |
761 | if (!options.use_pam) | |
762 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
763 | ||
764 | buffer_init(&m); | |
765 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
766 | ||
540d72c3 | 767 | mm_request_receive_expect(pmonitor->m_recvfd, |
7cac2b65 | 768 | MONITOR_ANS_PAM_ACCOUNT, &m); |
769 | ret = buffer_get_int(&m); | |
dfddba3d | 770 | msg = buffer_get_string(&m, NULL); |
771 | buffer_append(&loginmsg, msg, strlen(msg)); | |
772 | xfree(msg); | |
7cac2b65 | 773 | |
774 | buffer_free(&m); | |
540d72c3 | 775 | |
7cac2b65 | 776 | debug3("%s returning %d", __func__, ret); |
777 | ||
778 | return (ret); | |
779 | } | |
780 | ||
781 | void * | |
782 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
783 | { | |
784 | Buffer m; | |
785 | int success; | |
786 | ||
787 | debug3("%s", __func__); | |
788 | buffer_init(&m); | |
789 | buffer_put_cstring(&m, authctxt->user); | |
790 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
791 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
792 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
793 | success = buffer_get_int(&m); | |
794 | if (success == 0) { | |
795 | debug3("%s: pam_init_ctx failed", __func__); | |
796 | buffer_free(&m); | |
797 | return (NULL); | |
798 | } | |
799 | buffer_free(&m); | |
800 | return (authctxt); | |
801 | } | |
802 | ||
803 | int | |
804 | mm_sshpam_query(void *ctx, char **name, char **info, | |
805 | u_int *num, char ***prompts, u_int **echo_on) | |
806 | { | |
807 | Buffer m; | |
2ce0bfe4 | 808 | u_int i; |
809 | int ret; | |
7cac2b65 | 810 | |
811 | debug3("%s", __func__); | |
812 | buffer_init(&m); | |
813 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
814 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
815 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
816 | ret = buffer_get_int(&m); | |
817 | debug3("%s: pam_query returned %d", __func__, ret); | |
818 | *name = buffer_get_string(&m, NULL); | |
819 | *info = buffer_get_string(&m, NULL); | |
820 | *num = buffer_get_int(&m); | |
30460aeb | 821 | if (*num > PAM_MAX_NUM_MSG) |
822 | fatal("%s: recieved %u PAM messages, expected <= %u", | |
823 | __func__, *num, PAM_MAX_NUM_MSG); | |
824 | *prompts = xcalloc((*num + 1), sizeof(char *)); | |
825 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); | |
7cac2b65 | 826 | for (i = 0; i < *num; ++i) { |
827 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
828 | (*echo_on)[i] = buffer_get_int(&m); | |
829 | } | |
830 | buffer_free(&m); | |
831 | return (ret); | |
832 | } | |
833 | ||
834 | int | |
835 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
836 | { | |
837 | Buffer m; | |
2ce0bfe4 | 838 | u_int i; |
839 | int ret; | |
7cac2b65 | 840 | |
841 | debug3("%s", __func__); | |
842 | buffer_init(&m); | |
843 | buffer_put_int(&m, num); | |
844 | for (i = 0; i < num; ++i) | |
845 | buffer_put_cstring(&m, resp[i]); | |
846 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
847 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
848 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
849 | ret = buffer_get_int(&m); | |
850 | debug3("%s: pam_respond returned %d", __func__, ret); | |
851 | buffer_free(&m); | |
852 | return (ret); | |
853 | } | |
854 | ||
855 | void | |
856 | mm_sshpam_free_ctx(void *ctxtp) | |
857 | { | |
858 | Buffer m; | |
859 | ||
860 | debug3("%s", __func__); | |
861 | buffer_init(&m); | |
862 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
863 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
864 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
865 | buffer_free(&m); | |
866 | } | |
826f3a39 | 867 | #endif /* USE_PAM */ |
868 | ||
869 | /* Request process termination */ | |
870 | ||
871 | void | |
872 | mm_terminate(void) | |
873 | { | |
874 | Buffer m; | |
875 | ||
876 | buffer_init(&m); | |
877 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); | |
878 | buffer_free(&m); | |
879 | } | |
880 | ||
881 | int | |
882 | mm_ssh1_session_key(BIGNUM *num) | |
883 | { | |
884 | int rsafail; | |
885 | Buffer m; | |
886 | ||
887 | buffer_init(&m); | |
888 | buffer_put_bignum2(&m, num); | |
889 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); | |
890 | ||
891 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); | |
892 | ||
893 | rsafail = buffer_get_int(&m); | |
894 | buffer_get_bignum2(&m, num); | |
895 | ||
896 | buffer_free(&m); | |
897 | ||
898 | return (rsafail); | |
899 | } | |
900 | ||
901 | static void | |
902 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
903 | char ***prompts, u_int **echo_on) | |
904 | { | |
44a053a3 | 905 | *name = xstrdup(""); |
906 | *infotxt = xstrdup(""); | |
826f3a39 | 907 | *numprompts = 1; |
30460aeb | 908 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
909 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
826f3a39 | 910 | (*echo_on)[0] = 0; |
911 | } | |
912 | ||
913 | int | |
914 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
915 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
916 | { | |
917 | Buffer m; | |
bfe49944 | 918 | u_int success; |
826f3a39 | 919 | char *challenge; |
920 | ||
44a053a3 | 921 | debug3("%s: entering", __func__); |
826f3a39 | 922 | |
923 | buffer_init(&m); | |
924 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); | |
925 | ||
926 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, | |
927 | &m); | |
bfe49944 | 928 | success = buffer_get_int(&m); |
929 | if (success == 0) { | |
44a053a3 | 930 | debug3("%s: no challenge", __func__); |
826f3a39 | 931 | buffer_free(&m); |
932 | return (-1); | |
933 | } | |
934 | ||
935 | /* Get the challenge, and format the response */ | |
936 | challenge = buffer_get_string(&m, NULL); | |
937 | buffer_free(&m); | |
938 | ||
939 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
940 | (*prompts)[0] = challenge; | |
941 | ||
44a053a3 | 942 | debug3("%s: received challenge: %s", __func__, challenge); |
826f3a39 | 943 | |
944 | return (0); | |
945 | } | |
946 | ||
947 | int | |
948 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
949 | { | |
950 | Buffer m; | |
951 | int authok; | |
952 | ||
44a053a3 | 953 | debug3("%s: entering", __func__); |
826f3a39 | 954 | if (numresponses != 1) |
955 | return (-1); | |
956 | ||
957 | buffer_init(&m); | |
958 | buffer_put_cstring(&m, responses[0]); | |
959 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); | |
960 | ||
961 | mm_request_receive_expect(pmonitor->m_recvfd, | |
962 | MONITOR_ANS_BSDAUTHRESPOND, &m); | |
963 | ||
964 | authok = buffer_get_int(&m); | |
965 | buffer_free(&m); | |
966 | ||
967 | return ((authok == 0) ? -1 : 0); | |
968 | } | |
969 | ||
7e82606e | 970 | #ifdef SKEY |
826f3a39 | 971 | int |
972 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
973 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
974 | { | |
975 | Buffer m; | |
bfe49944 | 976 | u_int success; |
30460aeb | 977 | char *challenge; |
826f3a39 | 978 | |
44a053a3 | 979 | debug3("%s: entering", __func__); |
826f3a39 | 980 | |
981 | buffer_init(&m); | |
982 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); | |
983 | ||
984 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, | |
985 | &m); | |
bfe49944 | 986 | success = buffer_get_int(&m); |
987 | if (success == 0) { | |
44a053a3 | 988 | debug3("%s: no challenge", __func__); |
826f3a39 | 989 | buffer_free(&m); |
990 | return (-1); | |
991 | } | |
992 | ||
993 | /* Get the challenge, and format the response */ | |
994 | challenge = buffer_get_string(&m, NULL); | |
995 | buffer_free(&m); | |
996 | ||
44a053a3 | 997 | debug3("%s: received challenge: %s", __func__, challenge); |
826f3a39 | 998 | |
999 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
1000 | ||
30460aeb | 1001 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
826f3a39 | 1002 | xfree(challenge); |
1003 | ||
1004 | return (0); | |
1005 | } | |
1006 | ||
1007 | int | |
1008 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
1009 | { | |
1010 | Buffer m; | |
1011 | int authok; | |
1012 | ||
44a053a3 | 1013 | debug3("%s: entering", __func__); |
826f3a39 | 1014 | if (numresponses != 1) |
1015 | return (-1); | |
1016 | ||
1017 | buffer_init(&m); | |
1018 | buffer_put_cstring(&m, responses[0]); | |
1019 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); | |
1020 | ||
1021 | mm_request_receive_expect(pmonitor->m_recvfd, | |
1022 | MONITOR_ANS_SKEYRESPOND, &m); | |
1023 | ||
1024 | authok = buffer_get_int(&m); | |
1025 | buffer_free(&m); | |
1026 | ||
1027 | return ((authok == 0) ? -1 : 0); | |
1028 | } | |
7e82606e | 1029 | #endif /* SKEY */ |
826f3a39 | 1030 | |
1031 | void | |
1032 | mm_ssh1_session_id(u_char session_id[16]) | |
1033 | { | |
1034 | Buffer m; | |
1035 | int i; | |
1036 | ||
44a053a3 | 1037 | debug3("%s entering", __func__); |
826f3a39 | 1038 | |
1039 | buffer_init(&m); | |
1040 | for (i = 0; i < 16; i++) | |
1041 | buffer_put_char(&m, session_id[i]); | |
1042 | ||
1043 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); | |
1044 | buffer_free(&m); | |
1045 | } | |
1046 | ||
1047 | int | |
1048 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1049 | { | |
1050 | Buffer m; | |
1051 | Key *key; | |
1052 | u_char *blob; | |
1053 | u_int blen; | |
bfe49944 | 1054 | int allowed = 0, have_forced = 0; |
826f3a39 | 1055 | |
44a053a3 | 1056 | debug3("%s entering", __func__); |
826f3a39 | 1057 | |
1058 | buffer_init(&m); | |
1059 | buffer_put_bignum2(&m, client_n); | |
1060 | ||
1061 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); | |
1062 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1063 | ||
1064 | allowed = buffer_get_int(&m); | |
1065 | ||
bfe49944 | 1066 | /* fake forced command */ |
1067 | auth_clear_options(); | |
1068 | have_forced = buffer_get_int(&m); | |
1069 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1070 | ||
826f3a39 | 1071 | if (allowed && rkey != NULL) { |
1072 | blob = buffer_get_string(&m, &blen); | |
1073 | if ((key = key_from_blob(blob, blen)) == NULL) | |
44a053a3 | 1074 | fatal("%s: key_from_blob failed", __func__); |
826f3a39 | 1075 | *rkey = key; |
1076 | xfree(blob); | |
1077 | } | |
1078 | mm_send_debug(&m); | |
1079 | buffer_free(&m); | |
1080 | ||
1081 | return (allowed); | |
1082 | } | |
1083 | ||
1084 | BIGNUM * | |
1085 | mm_auth_rsa_generate_challenge(Key *key) | |
1086 | { | |
1087 | Buffer m; | |
1088 | BIGNUM *challenge; | |
1089 | u_char *blob; | |
1090 | u_int blen; | |
1091 | ||
44a053a3 | 1092 | debug3("%s entering", __func__); |
826f3a39 | 1093 | |
1094 | if ((challenge = BN_new()) == NULL) | |
44a053a3 | 1095 | fatal("%s: BN_new failed", __func__); |
826f3a39 | 1096 | |
1097 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1098 | if (key_to_blob(key, &blob, &blen) == 0) | |
44a053a3 | 1099 | fatal("%s: key_to_blob failed", __func__); |
826f3a39 | 1100 | key->type = KEY_RSA1; |
1101 | ||
1102 | buffer_init(&m); | |
1103 | buffer_put_string(&m, blob, blen); | |
1104 | xfree(blob); | |
1105 | ||
1106 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); | |
1107 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1108 | ||
1109 | buffer_get_bignum2(&m, challenge); | |
1110 | buffer_free(&m); | |
1111 | ||
1112 | return (challenge); | |
1113 | } | |
1114 | ||
1115 | int | |
1116 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1117 | { | |
1118 | Buffer m; | |
1119 | u_char *blob; | |
1120 | u_int blen; | |
1121 | int success = 0; | |
1122 | ||
44a053a3 | 1123 | debug3("%s entering", __func__); |
826f3a39 | 1124 | |
1125 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1126 | if (key_to_blob(key, &blob, &blen) == 0) | |
44a053a3 | 1127 | fatal("%s: key_to_blob failed", __func__); |
826f3a39 | 1128 | key->type = KEY_RSA1; |
1129 | ||
1130 | buffer_init(&m); | |
1131 | buffer_put_string(&m, blob, blen); | |
1132 | buffer_put_string(&m, response, 16); | |
1133 | xfree(blob); | |
1134 | ||
1135 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); | |
1136 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1137 | ||
1138 | success = buffer_get_int(&m); | |
1139 | buffer_free(&m); | |
1140 | ||
1141 | return (success); | |
1142 | } | |
23987cb8 | 1143 | |
dfddba3d | 1144 | #ifdef SSH_AUDIT_EVENTS |
1145 | void | |
1146 | mm_audit_event(ssh_audit_event_t event) | |
1147 | { | |
1148 | Buffer m; | |
1149 | ||
1150 | debug3("%s entering", __func__); | |
1151 | ||
1152 | buffer_init(&m); | |
1153 | buffer_put_int(&m, event); | |
1154 | ||
1155 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1156 | buffer_free(&m); | |
1157 | } | |
1158 | ||
1159 | void | |
1160 | mm_audit_run_command(const char *command) | |
1161 | { | |
1162 | Buffer m; | |
1163 | ||
1164 | debug3("%s entering command %s", __func__, command); | |
1165 | ||
1166 | buffer_init(&m); | |
1167 | buffer_put_cstring(&m, command); | |
1168 | ||
1169 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1170 | buffer_free(&m); | |
1171 | } | |
1172 | #endif /* SSH_AUDIT_EVENTS */ | |
1173 | ||
7cac2b65 | 1174 | #ifdef GSSAPI |
1175 | OM_uint32 | |
7e82606e | 1176 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
23987cb8 | 1177 | { |
7cac2b65 | 1178 | Buffer m; |
1179 | OM_uint32 major; | |
23987cb8 | 1180 | |
7cac2b65 | 1181 | /* Client doesn't get to see the context */ |
1182 | *ctx = NULL; | |
23987cb8 | 1183 | |
1184 | buffer_init(&m); | |
7e82606e | 1185 | buffer_put_string(&m, goid->elements, goid->length); |
23987cb8 | 1186 | |
7cac2b65 | 1187 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); |
1188 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1189 | ||
1190 | major = buffer_get_int(&m); | |
23987cb8 | 1191 | |
23987cb8 | 1192 | buffer_free(&m); |
7cac2b65 | 1193 | return (major); |
23987cb8 | 1194 | } |
23987cb8 | 1195 | |
7cac2b65 | 1196 | OM_uint32 |
1197 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1198 | gss_buffer_desc *out, OM_uint32 *flags) | |
23987cb8 | 1199 | { |
23987cb8 | 1200 | Buffer m; |
7cac2b65 | 1201 | OM_uint32 major; |
1202 | u_int len; | |
23987cb8 | 1203 | |
1204 | buffer_init(&m); | |
7cac2b65 | 1205 | buffer_put_string(&m, in->value, in->length); |
23987cb8 | 1206 | |
7cac2b65 | 1207 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); |
1208 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
23987cb8 | 1209 | |
7cac2b65 | 1210 | major = buffer_get_int(&m); |
1211 | out->value = buffer_get_string(&m, &len); | |
1212 | out->length = len; | |
1213 | if (flags) | |
1214 | *flags = buffer_get_int(&m); | |
23987cb8 | 1215 | |
1216 | buffer_free(&m); | |
b59afbfe | 1217 | |
7cac2b65 | 1218 | return (major); |
b59afbfe | 1219 | } |
1220 | ||
540d72c3 | 1221 | OM_uint32 |
1222 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1223 | { | |
1224 | Buffer m; | |
1225 | OM_uint32 major; | |
1226 | ||
1227 | buffer_init(&m); | |
1228 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1229 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1230 | ||
1231 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1232 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1233 | &m); | |
1234 | ||
1235 | major = buffer_get_int(&m); | |
1236 | buffer_free(&m); | |
1237 | return(major); | |
1238 | } | |
1239 | ||
7cac2b65 | 1240 | int |
1241 | mm_ssh_gssapi_userok(char *user) | |
1242 | { | |
1243 | Buffer m; | |
1244 | int authenticated = 0; | |
b59afbfe | 1245 | |
7cac2b65 | 1246 | buffer_init(&m); |
b59afbfe | 1247 | |
7cac2b65 | 1248 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); |
1249 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1250 | &m); | |
b59afbfe | 1251 | |
7cac2b65 | 1252 | authenticated = buffer_get_int(&m); |
b59afbfe | 1253 | |
23987cb8 | 1254 | buffer_free(&m); |
7cac2b65 | 1255 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); |
1256 | return (authenticated); | |
b59afbfe | 1257 | } |
1258 | ||
b59afbfe | 1259 | OM_uint32 |
fe4ad273 | 1260 | mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash) |
1261 | { | |
1262 | Buffer m; | |
1263 | OM_uint32 major; | |
77e22b94 | 1264 | u_int len; |
b59afbfe | 1265 | |
fe4ad273 | 1266 | buffer_init(&m); |
1267 | buffer_put_string(&m, data->value, data->length); | |
b59afbfe | 1268 | |
fe4ad273 | 1269 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m); |
1270 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m); | |
23987cb8 | 1271 | |
fe4ad273 | 1272 | major = buffer_get_int(&m); |
1273 | hash->value = buffer_get_string(&m, &len); | |
77e22b94 | 1274 | hash->length = len; |
b59afbfe | 1275 | |
23987cb8 | 1276 | buffer_free(&m); |
fe4ad273 | 1277 | |
1278 | return(major); | |
b59afbfe | 1279 | } |
9eeaa28e | 1280 | |
23987cb8 | 1281 | char * |
1282 | mm_ssh_gssapi_last_error(Gssctxt *ctx, OM_uint32 *major, OM_uint32 *minor) { | |
1283 | Buffer m; | |
1284 | OM_uint32 maj,min; | |
1285 | char *errstr; | |
1286 | ||
1287 | buffer_init(&m); | |
1288 | ||
1289 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSERR, &m); | |
1290 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSERR, &m); | |
1291 | ||
1292 | maj = buffer_get_int(&m); | |
1293 | min = buffer_get_int(&m); | |
1294 | ||
1295 | if (major) *major=maj; | |
1296 | if (minor) *minor=min; | |
1297 | ||
1298 | errstr=buffer_get_string(&m,NULL); | |
1299 | ||
1300 | buffer_free(&m); | |
1301 | ||
1302 | return(errstr); | |
1303 | } | |
e23e524c | 1304 | |
9eeaa28e | 1305 | OM_uint32 |
1306 | mm_gss_indicate_mechs(OM_uint32 *minor_status, gss_OID_set *mech_set) | |
1307 | { | |
1308 | Buffer m; | |
e23e524c | 1309 | OM_uint32 major,minor; |
1310 | int count; | |
1311 | gss_OID_desc oid; | |
d7590ddf | 1312 | u_int length; |
1313 | ||
9eeaa28e | 1314 | buffer_init(&m); |
1315 | ||
1316 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSMECHS, &m); | |
9eeaa28e | 1317 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSMECHS, |
1318 | &m); | |
1319 | major=buffer_get_int(&m); | |
17a7ea48 | 1320 | count=buffer_get_int(&m); |
e23e524c | 1321 | |
1322 | gss_create_empty_oid_set(&minor,mech_set); | |
1323 | while(count-->0) { | |
e23e524c | 1324 | oid.elements=buffer_get_string(&m,&length); |
1325 | oid.length=length; | |
1326 | gss_add_oid_set_member(&minor,&oid,mech_set); | |
9eeaa28e | 1327 | } |
1328 | ||
23987cb8 | 1329 | buffer_free(&m); |
9eeaa28e | 1330 | |
23987cb8 | 1331 | return(major); |
9eeaa28e | 1332 | } |
e23e524c | 1333 | |
1334 | int | |
1335 | mm_ssh_gssapi_localname(char **lname) | |
1336 | { | |
1337 | Buffer m; | |
1338 | ||
1339 | buffer_init(&m); | |
1340 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSLOCALNAME, &m); | |
1341 | ||
1342 | debug3("%s: waiting for MONITOR_ANS_GSSLOCALNAME", __func__); | |
1343 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSLOCALNAME, | |
1344 | &m); | |
1345 | ||
1346 | *lname = buffer_get_string(&m, NULL); | |
1347 | ||
1348 | buffer_free(&m); | |
1349 | if (lname[0] == '\0') { | |
1350 | debug3("%s: gssapi identity mapping failed", __func__); | |
1351 | } else { | |
1352 | debug3("%s: gssapi identity mapped to %s", __func__, *lname); | |
1353 | } | |
1354 | ||
1355 | return(0); | |
1356 | } | |
fe4ad273 | 1357 | |
b59afbfe | 1358 | #endif /* GSSAPI */ |