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a3d3770c | 1 | /* $OpenBSD: monitor_wrap.c,v 1.59 2007/09/21 08:15:29 djm 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> |
428f6258 | 31 | #include <sys/uio.h> |
b1842393 | 32 | |
028094f4 | 33 | #include <errno.h> |
b1842393 | 34 | #include <pwd.h> |
31652869 | 35 | #include <signal.h> |
24436b92 | 36 | #include <stdarg.h> |
cf851879 | 37 | #include <stdio.h> |
00146caa | 38 | #include <string.h> |
428f6258 | 39 | #include <unistd.h> |
b1842393 | 40 | |
31652869 | 41 | #include <openssl/bn.h> |
42 | #include <openssl/dh.h> | |
43 | ||
44 | #include "xmalloc.h" | |
1853d1ef | 45 | #include "ssh.h" |
46 | #include "dh.h" | |
31652869 | 47 | #include "buffer.h" |
48 | #include "key.h" | |
49 | #include "cipher.h" | |
1853d1ef | 50 | #include "kex.h" |
31652869 | 51 | #include "hostfile.h" |
1853d1ef | 52 | #include "auth.h" |
92e15201 | 53 | #include "auth-options.h" |
1853d1ef | 54 | #include "packet.h" |
55 | #include "mac.h" | |
56 | #include "log.h" | |
a655c012 | 57 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
58 | #undef TARGET_OS_MAC | |
9b08c23f | 59 | #include "zlib.h" |
a655c012 | 60 | #define TARGET_OS_MAC 1 |
61 | #else | |
62 | #include "zlib.h" | |
63 | #endif | |
1853d1ef | 64 | #include "monitor.h" |
31652869 | 65 | #ifdef GSSAPI |
66 | #include "ssh-gss.h" | |
67 | #endif | |
1853d1ef | 68 | #include "monitor_wrap.h" |
1853d1ef | 69 | #include "atomicio.h" |
70 | #include "monitor_fdpass.h" | |
51e7a012 | 71 | #include "misc.h" |
7fceb20d | 72 | #include "servconf.h" |
1853d1ef | 73 | |
1853d1ef | 74 | #include "channels.h" |
75 | #include "session.h" | |
03bcbf84 | 76 | #include "servconf.h" |
1853d1ef | 77 | |
78 | /* Imports */ | |
79 | extern int compat20; | |
80 | extern Newkeys *newkeys[]; | |
81 | extern z_stream incoming_stream; | |
82 | extern z_stream outgoing_stream; | |
b5a28cbc | 83 | extern struct monitor *pmonitor; |
1853d1ef | 84 | extern Buffer input, output; |
be2ca0c9 | 85 | extern Buffer loginmsg; |
7fceb20d | 86 | extern ServerOptions options; |
1853d1ef | 87 | |
2362db19 | 88 | int |
89 | mm_is_monitor(void) | |
90 | { | |
91 | /* | |
92 | * m_pid is only set in the privileged part, and | |
93 | * points to the unprivileged child. | |
94 | */ | |
74677ba3 | 95 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 96 | } |
97 | ||
1853d1ef | 98 | void |
ca75d7de | 99 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 100 | { |
1853d1ef | 101 | u_int mlen = buffer_len(m); |
405a0d43 | 102 | u_char buf[5]; |
1853d1ef | 103 | |
1588c277 | 104 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 105 | |
51e7a012 | 106 | put_u32(buf, mlen + 1); |
7203d6bb | 107 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
ca75d7de | 108 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
05624c18 | 109 | fatal("%s: write: %s", __func__, strerror(errno)); |
ca75d7de | 110 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
05624c18 | 111 | fatal("%s: write: %s", __func__, strerror(errno)); |
1853d1ef | 112 | } |
113 | ||
114 | void | |
ca75d7de | 115 | mm_request_receive(int sock, Buffer *m) |
1853d1ef | 116 | { |
117 | u_char buf[4]; | |
1853d1ef | 118 | u_int msg_len; |
119 | ||
1588c277 | 120 | debug3("%s entering", __func__); |
1853d1ef | 121 | |
05624c18 | 122 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
123 | if (errno == EPIPE) | |
2362db19 | 124 | cleanup_exit(255); |
05624c18 | 125 | fatal("%s: read: %s", __func__, strerror(errno)); |
1853d1ef | 126 | } |
51e7a012 | 127 | msg_len = get_u32(buf); |
1853d1ef | 128 | if (msg_len > 256 * 1024) |
1588c277 | 129 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 130 | buffer_clear(m); |
131 | buffer_append_space(m, msg_len); | |
05624c18 | 132 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
133 | fatal("%s: read: %s", __func__, strerror(errno)); | |
1853d1ef | 134 | } |
135 | ||
136 | void | |
ca75d7de | 137 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 138 | { |
139 | u_char rtype; | |
140 | ||
1588c277 | 141 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 142 | |
ca75d7de | 143 | mm_request_receive(sock, m); |
1853d1ef | 144 | rtype = buffer_get_char(m); |
145 | if (rtype != type) | |
1588c277 | 146 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 147 | rtype, type); |
148 | } | |
149 | ||
150 | DH * | |
151 | mm_choose_dh(int min, int nbits, int max) | |
152 | { | |
153 | BIGNUM *p, *g; | |
154 | int success = 0; | |
155 | Buffer m; | |
156 | ||
157 | buffer_init(&m); | |
158 | buffer_put_int(&m, min); | |
159 | buffer_put_int(&m, nbits); | |
160 | buffer_put_int(&m, max); | |
161 | ||
b5a28cbc | 162 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 163 | |
1588c277 | 164 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 165 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 166 | |
167 | success = buffer_get_char(&m); | |
168 | if (success == 0) | |
1588c277 | 169 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 170 | |
171 | if ((p = BN_new()) == NULL) | |
1588c277 | 172 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 173 | if ((g = BN_new()) == NULL) |
1588c277 | 174 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 175 | buffer_get_bignum2(&m, p); |
176 | buffer_get_bignum2(&m, g); | |
177 | ||
1588c277 | 178 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 179 | buffer_free(&m); |
180 | ||
181 | return (dh_new_group(g, p)); | |
182 | } | |
183 | ||
184 | int | |
185 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
186 | { | |
b5a28cbc | 187 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 188 | Buffer m; |
189 | ||
1588c277 | 190 | debug3("%s entering", __func__); |
1853d1ef | 191 | |
192 | buffer_init(&m); | |
193 | buffer_put_int(&m, kex->host_key_index(key)); | |
194 | buffer_put_string(&m, data, datalen); | |
195 | ||
b5a28cbc | 196 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 197 | |
1588c277 | 198 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 199 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 200 | *sigp = buffer_get_string(&m, lenp); |
201 | buffer_free(&m); | |
202 | ||
203 | return (0); | |
204 | } | |
205 | ||
206 | struct passwd * | |
18a8f313 | 207 | mm_getpwnamallow(const char *username) |
1853d1ef | 208 | { |
209 | Buffer m; | |
210 | struct passwd *pw; | |
03bcbf84 | 211 | u_int len; |
212 | ServerOptions *newopts; | |
1853d1ef | 213 | |
1588c277 | 214 | debug3("%s entering", __func__); |
1853d1ef | 215 | |
216 | buffer_init(&m); | |
18a8f313 | 217 | buffer_put_cstring(&m, username); |
1853d1ef | 218 | |
b5a28cbc | 219 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 220 | |
1588c277 | 221 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 222 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 223 | |
224 | if (buffer_get_char(&m) == 0) { | |
225 | buffer_free(&m); | |
226 | return (NULL); | |
227 | } | |
03bcbf84 | 228 | pw = buffer_get_string(&m, &len); |
229 | if (len != sizeof(struct passwd)) | |
1588c277 | 230 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 231 | pw->pw_name = buffer_get_string(&m, NULL); |
232 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
233 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 234 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 235 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 236 | #endif |
1853d1ef | 237 | pw->pw_dir = buffer_get_string(&m, NULL); |
238 | pw->pw_shell = buffer_get_string(&m, NULL); | |
03bcbf84 | 239 | |
240 | /* copy options block as a Match directive may have changed some */ | |
241 | newopts = buffer_get_string(&m, &len); | |
242 | if (len != sizeof(*newopts)) | |
243 | fatal("%s: option block size mismatch", __func__); | |
244 | if (newopts->banner != NULL) | |
245 | newopts->banner = buffer_get_string(&m, NULL); | |
246 | copy_set_server_options(&options, newopts, 1); | |
247 | xfree(newopts); | |
248 | ||
1853d1ef | 249 | buffer_free(&m); |
250 | ||
251 | return (pw); | |
252 | } | |
253 | ||
02cd6c56 | 254 | char * |
255 | mm_auth2_read_banner(void) | |
94a73cdc | 256 | { |
257 | Buffer m; | |
258 | char *banner; | |
259 | ||
1588c277 | 260 | debug3("%s entering", __func__); |
94a73cdc | 261 | |
262 | buffer_init(&m); | |
b5a28cbc | 263 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 264 | buffer_clear(&m); |
265 | ||
02cd6c56 | 266 | mm_request_receive_expect(pmonitor->m_recvfd, |
267 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 268 | banner = buffer_get_string(&m, NULL); |
269 | buffer_free(&m); | |
7203d6bb | 270 | |
02cd6c56 | 271 | /* treat empty banner as missing banner */ |
272 | if (strlen(banner) == 0) { | |
273 | xfree(banner); | |
274 | banner = NULL; | |
275 | } | |
94a73cdc | 276 | return (banner); |
277 | } | |
278 | ||
1853d1ef | 279 | /* Inform the privileged process about service and style */ |
280 | ||
281 | void | |
282 | mm_inform_authserv(char *service, char *style) | |
283 | { | |
284 | Buffer m; | |
285 | ||
1588c277 | 286 | debug3("%s entering", __func__); |
1853d1ef | 287 | |
288 | buffer_init(&m); | |
289 | buffer_put_cstring(&m, service); | |
290 | buffer_put_cstring(&m, style ? style : ""); | |
291 | ||
b5a28cbc | 292 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 293 | |
294 | buffer_free(&m); | |
295 | } | |
296 | ||
297 | /* Do the password authentication */ | |
298 | int | |
299 | mm_auth_password(Authctxt *authctxt, char *password) | |
300 | { | |
301 | Buffer m; | |
302 | int authenticated = 0; | |
303 | ||
1588c277 | 304 | debug3("%s entering", __func__); |
1853d1ef | 305 | |
306 | buffer_init(&m); | |
307 | buffer_put_cstring(&m, password); | |
b5a28cbc | 308 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 309 | |
1588c277 | 310 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 311 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 312 | |
313 | authenticated = buffer_get_int(&m); | |
314 | ||
315 | buffer_free(&m); | |
316 | ||
317 | debug3("%s: user %sauthenticated", | |
1588c277 | 318 | __func__, authenticated ? "" : "not "); |
1853d1ef | 319 | return (authenticated); |
320 | } | |
321 | ||
322 | int | |
323 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
324 | { | |
325 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
326 | } | |
327 | ||
328 | int | |
329 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
330 | Key *key) | |
331 | { | |
332 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
333 | } | |
334 | ||
335 | int | |
336 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
337 | char *host, Key *key) | |
338 | { | |
339 | int ret; | |
340 | ||
341 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
342 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
343 | key->type = KEY_RSA1; | |
344 | return (ret); | |
345 | } | |
346 | ||
347 | static void | |
348 | mm_send_debug(Buffer *m) | |
349 | { | |
350 | char *msg; | |
351 | ||
352 | while (buffer_len(m)) { | |
353 | msg = buffer_get_string(m, NULL); | |
1588c277 | 354 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 355 | packet_send_debug("%s", msg); |
356 | xfree(msg); | |
357 | } | |
358 | } | |
359 | ||
360 | int | |
361 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
362 | { | |
363 | Buffer m; | |
364 | u_char *blob; | |
365 | u_int len; | |
92e15201 | 366 | int allowed = 0, have_forced = 0; |
1853d1ef | 367 | |
1588c277 | 368 | debug3("%s entering", __func__); |
1853d1ef | 369 | |
370 | /* Convert the key to a blob and the pass it over */ | |
371 | if (!key_to_blob(key, &blob, &len)) | |
372 | return (0); | |
373 | ||
374 | buffer_init(&m); | |
375 | buffer_put_int(&m, type); | |
376 | buffer_put_cstring(&m, user ? user : ""); | |
377 | buffer_put_cstring(&m, host ? host : ""); | |
378 | buffer_put_string(&m, blob, len); | |
379 | xfree(blob); | |
380 | ||
b5a28cbc | 381 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 382 | |
1588c277 | 383 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 384 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 385 | |
386 | allowed = buffer_get_int(&m); | |
387 | ||
92e15201 | 388 | /* fake forced command */ |
389 | auth_clear_options(); | |
390 | have_forced = buffer_get_int(&m); | |
391 | forced_command = have_forced ? xstrdup("true") : NULL; | |
392 | ||
1853d1ef | 393 | /* Send potential debug messages */ |
394 | mm_send_debug(&m); | |
395 | ||
396 | buffer_free(&m); | |
397 | ||
398 | return (allowed); | |
399 | } | |
400 | ||
401 | /* | |
402 | * This key verify needs to send the key type along, because the | |
403 | * privileged parent makes the decision if the key is allowed | |
404 | * for authentication. | |
405 | */ | |
406 | ||
407 | int | |
408 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
409 | { | |
410 | Buffer m; | |
411 | u_char *blob; | |
412 | u_int len; | |
413 | int verified = 0; | |
414 | ||
1588c277 | 415 | debug3("%s entering", __func__); |
1853d1ef | 416 | |
417 | /* Convert the key to a blob and the pass it over */ | |
418 | if (!key_to_blob(key, &blob, &len)) | |
419 | return (0); | |
420 | ||
421 | buffer_init(&m); | |
422 | buffer_put_string(&m, blob, len); | |
423 | buffer_put_string(&m, sig, siglen); | |
424 | buffer_put_string(&m, data, datalen); | |
425 | xfree(blob); | |
426 | ||
b5a28cbc | 427 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 428 | |
1588c277 | 429 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 430 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 431 | |
432 | verified = buffer_get_int(&m); | |
433 | ||
434 | buffer_free(&m); | |
435 | ||
436 | return (verified); | |
437 | } | |
438 | ||
439 | /* Export key state after authentication */ | |
440 | Newkeys * | |
441 | mm_newkeys_from_blob(u_char *blob, int blen) | |
442 | { | |
443 | Buffer b; | |
444 | u_int len; | |
445 | Newkeys *newkey = NULL; | |
446 | Enc *enc; | |
447 | Mac *mac; | |
448 | Comp *comp; | |
449 | ||
1588c277 | 450 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 451 | #ifdef DEBUG_PK |
452 | dump_base64(stderr, blob, blen); | |
453 | #endif | |
454 | buffer_init(&b); | |
455 | buffer_append(&b, blob, blen); | |
456 | ||
457 | newkey = xmalloc(sizeof(*newkey)); | |
458 | enc = &newkey->enc; | |
459 | mac = &newkey->mac; | |
460 | comp = &newkey->comp; | |
461 | ||
462 | /* Enc structure */ | |
463 | enc->name = buffer_get_string(&b, NULL); | |
464 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
465 | enc->enabled = buffer_get_int(&b); | |
466 | enc->block_size = buffer_get_int(&b); | |
467 | enc->key = buffer_get_string(&b, &enc->key_len); | |
468 | enc->iv = buffer_get_string(&b, &len); | |
469 | if (len != enc->block_size) | |
bb0640b2 | 470 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 471 | enc->block_size, len); |
472 | ||
473 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 474 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 475 | enc->name, enc->cipher); |
476 | ||
477 | /* Mac structure */ | |
478 | mac->name = buffer_get_string(&b, NULL); | |
a3de8da1 | 479 | if (mac->name == NULL || mac_setup(mac, mac->name) == -1) |
f444d0f8 | 480 | fatal("%s: can not setup mac %s", __func__, mac->name); |
1853d1ef | 481 | mac->enabled = buffer_get_int(&b); |
482 | mac->key = buffer_get_string(&b, &len); | |
483 | if (len > mac->key_len) | |
bb0640b2 | 484 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 485 | mac->key_len); |
486 | mac->key_len = len; | |
487 | ||
488 | /* Comp structure */ | |
489 | comp->type = buffer_get_int(&b); | |
490 | comp->enabled = buffer_get_int(&b); | |
491 | comp->name = buffer_get_string(&b, NULL); | |
492 | ||
493 | len = buffer_len(&b); | |
494 | if (len != 0) | |
bb0640b2 | 495 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 496 | buffer_free(&b); |
497 | return (newkey); | |
498 | } | |
499 | ||
500 | int | |
501 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
502 | { | |
503 | Buffer b; | |
504 | int len; | |
1853d1ef | 505 | Enc *enc; |
506 | Mac *mac; | |
507 | Comp *comp; | |
508 | Newkeys *newkey = newkeys[mode]; | |
509 | ||
1588c277 | 510 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 511 | |
512 | if (newkey == NULL) { | |
1588c277 | 513 | error("%s: newkey == NULL", __func__); |
1853d1ef | 514 | return 0; |
515 | } | |
516 | enc = &newkey->enc; | |
517 | mac = &newkey->mac; | |
518 | comp = &newkey->comp; | |
519 | ||
520 | buffer_init(&b); | |
521 | /* Enc structure */ | |
522 | buffer_put_cstring(&b, enc->name); | |
523 | /* The cipher struct is constant and shared, you export pointer */ | |
524 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
525 | buffer_put_int(&b, enc->enabled); | |
526 | buffer_put_int(&b, enc->block_size); | |
527 | buffer_put_string(&b, enc->key, enc->key_len); | |
528 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
529 | buffer_put_string(&b, enc->iv, enc->block_size); | |
530 | ||
531 | /* Mac structure */ | |
532 | buffer_put_cstring(&b, mac->name); | |
533 | buffer_put_int(&b, mac->enabled); | |
534 | buffer_put_string(&b, mac->key, mac->key_len); | |
535 | ||
536 | /* Comp structure */ | |
537 | buffer_put_int(&b, comp->type); | |
538 | buffer_put_int(&b, comp->enabled); | |
539 | buffer_put_cstring(&b, comp->name); | |
540 | ||
541 | len = buffer_len(&b); | |
1853d1ef | 542 | if (lenp != NULL) |
543 | *lenp = len; | |
eb9f2fab | 544 | if (blobp != NULL) { |
545 | *blobp = xmalloc(len); | |
546 | memcpy(*blobp, buffer_ptr(&b), len); | |
547 | } | |
548 | memset(buffer_ptr(&b), 0, len); | |
549 | buffer_free(&b); | |
1853d1ef | 550 | return len; |
551 | } | |
552 | ||
553 | static void | |
554 | mm_send_kex(Buffer *m, Kex *kex) | |
555 | { | |
556 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
557 | buffer_put_int(m, kex->we_need); | |
558 | buffer_put_int(m, kex->hostkey_type); | |
559 | buffer_put_int(m, kex->kex_type); | |
560 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
561 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
562 | buffer_put_int(m, kex->flags); | |
563 | buffer_put_cstring(m, kex->client_version_string); | |
564 | buffer_put_cstring(m, kex->server_version_string); | |
565 | } | |
566 | ||
567 | void | |
ca75d7de | 568 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 569 | { |
570 | Buffer m; | |
571 | u_char *blob, *p; | |
572 | u_int bloblen, plen; | |
ffd7b36b | 573 | u_int32_t seqnr, packets; |
574 | u_int64_t blocks; | |
1853d1ef | 575 | |
576 | buffer_init(&m); | |
577 | ||
578 | if (!compat20) { | |
579 | u_char iv[24]; | |
9459414c | 580 | u_char *key; |
581 | u_int ivlen, keylen; | |
1853d1ef | 582 | |
583 | buffer_put_int(&m, packet_get_protocol_flags()); | |
584 | ||
585 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
586 | ||
9459414c | 587 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
588 | keylen = packet_get_encryption_key(NULL); | |
589 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
590 | keylen = packet_get_encryption_key(key); | |
591 | buffer_put_string(&m, key, keylen); | |
592 | memset(key, 0, keylen); | |
593 | xfree(key); | |
594 | ||
1853d1ef | 595 | ivlen = packet_get_keyiv_len(MODE_OUT); |
596 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
597 | buffer_put_string(&m, iv, ivlen); | |
598 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
599 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
600 | buffer_put_string(&m, iv, ivlen); | |
601 | goto skip; | |
602 | } else { | |
603 | /* Kex for rekeying */ | |
ca75d7de | 604 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 605 | } |
606 | ||
607 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 608 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 609 | |
610 | /* Keys from Kex */ | |
611 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 612 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 613 | |
614 | buffer_put_string(&m, blob, bloblen); | |
615 | xfree(blob); | |
616 | ||
617 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 618 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 619 | |
620 | buffer_put_string(&m, blob, bloblen); | |
621 | xfree(blob); | |
622 | ||
ffd7b36b | 623 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
624 | buffer_put_int(&m, seqnr); | |
625 | buffer_put_int64(&m, blocks); | |
626 | buffer_put_int(&m, packets); | |
806e4c11 | 627 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 628 | buffer_put_int(&m, seqnr); |
629 | buffer_put_int64(&m, blocks); | |
630 | buffer_put_int(&m, packets); | |
1853d1ef | 631 | |
1588c277 | 632 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 633 | skip: |
634 | /* More key context */ | |
635 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
636 | p = xmalloc(plen+1); | |
637 | packet_get_keycontext(MODE_OUT, p); | |
638 | buffer_put_string(&m, p, plen); | |
639 | xfree(p); | |
640 | ||
641 | plen = packet_get_keycontext(MODE_IN, NULL); | |
642 | p = xmalloc(plen+1); | |
643 | packet_get_keycontext(MODE_IN, p); | |
644 | buffer_put_string(&m, p, plen); | |
645 | xfree(p); | |
646 | ||
647 | /* Compression state */ | |
1588c277 | 648 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 649 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
650 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
651 | ||
652 | /* Network I/O buffers */ | |
653 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
654 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
655 | ||
ca75d7de | 656 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 657 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 658 | |
659 | buffer_free(&m); | |
660 | } | |
661 | ||
662 | int | |
148de80c | 663 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
1853d1ef | 664 | { |
665 | Buffer m; | |
be2ca0c9 | 666 | char *p, *msg; |
1853d1ef | 667 | int success = 0; |
668 | ||
669 | buffer_init(&m); | |
b5a28cbc | 670 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 671 | |
1588c277 | 672 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 673 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 674 | |
675 | success = buffer_get_int(&m); | |
676 | if (success == 0) { | |
1588c277 | 677 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 678 | buffer_free(&m); |
679 | return (0); | |
680 | } | |
681 | p = buffer_get_string(&m, NULL); | |
be2ca0c9 | 682 | msg = buffer_get_string(&m, NULL); |
1853d1ef | 683 | buffer_free(&m); |
684 | ||
685 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
686 | xfree(p); | |
687 | ||
be2ca0c9 | 688 | buffer_append(&loginmsg, msg, strlen(msg)); |
689 | xfree(msg); | |
690 | ||
8de7aaab | 691 | if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 || |
692 | (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1) | |
693 | fatal("%s: receive fds failed", __func__); | |
1853d1ef | 694 | |
695 | /* Success */ | |
696 | return (1); | |
697 | } | |
698 | ||
699 | void | |
2362db19 | 700 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 701 | { |
1853d1ef | 702 | Buffer m; |
703 | ||
704 | if (s->ttyfd == -1) | |
705 | return; | |
706 | buffer_init(&m); | |
707 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 708 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 709 | buffer_free(&m); |
710 | ||
711 | /* closed dup'ed master */ | |
712 | if (close(s->ptymaster) < 0) | |
713 | error("close(s->ptymaster): %s", strerror(errno)); | |
714 | ||
715 | /* unlink pty from session */ | |
716 | s->ttyfd = -1; | |
717 | } | |
718 | ||
ad200abb | 719 | #ifdef USE_PAM |
720 | void | |
529d73ab | 721 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 722 | { |
723 | Buffer m; | |
724 | ||
1588c277 | 725 | debug3("%s entering", __func__); |
7fceb20d | 726 | if (!options.use_pam) |
727 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 728 | |
729 | buffer_init(&m); | |
b5a28cbc | 730 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 731 | |
732 | buffer_free(&m); | |
733 | } | |
05114c74 | 734 | |
5b9e2464 | 735 | u_int |
736 | mm_do_pam_account(void) | |
737 | { | |
738 | Buffer m; | |
739 | u_int ret; | |
ba6dd90e | 740 | char *msg; |
5b9e2464 | 741 | |
742 | debug3("%s entering", __func__); | |
743 | if (!options.use_pam) | |
744 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
745 | ||
746 | buffer_init(&m); | |
747 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
748 | ||
aff51935 | 749 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 750 | MONITOR_ANS_PAM_ACCOUNT, &m); |
751 | ret = buffer_get_int(&m); | |
ba6dd90e | 752 | msg = buffer_get_string(&m, NULL); |
753 | buffer_append(&loginmsg, msg, strlen(msg)); | |
754 | xfree(msg); | |
5b9e2464 | 755 | |
756 | buffer_free(&m); | |
b6453d99 | 757 | |
5b9e2464 | 758 | debug3("%s returning %d", __func__, ret); |
759 | ||
760 | return (ret); | |
761 | } | |
762 | ||
05114c74 | 763 | void * |
764 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
765 | { | |
766 | Buffer m; | |
767 | int success; | |
768 | ||
769 | debug3("%s", __func__); | |
770 | buffer_init(&m); | |
771 | buffer_put_cstring(&m, authctxt->user); | |
772 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
773 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
774 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
775 | success = buffer_get_int(&m); | |
776 | if (success == 0) { | |
777 | debug3("%s: pam_init_ctx failed", __func__); | |
778 | buffer_free(&m); | |
779 | return (NULL); | |
780 | } | |
781 | buffer_free(&m); | |
782 | return (authctxt); | |
783 | } | |
784 | ||
785 | int | |
786 | mm_sshpam_query(void *ctx, char **name, char **info, | |
787 | u_int *num, char ***prompts, u_int **echo_on) | |
788 | { | |
789 | Buffer m; | |
a1a073cc | 790 | u_int i; |
791 | int ret; | |
05114c74 | 792 | |
793 | debug3("%s", __func__); | |
794 | buffer_init(&m); | |
795 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
796 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
797 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
798 | ret = buffer_get_int(&m); | |
799 | debug3("%s: pam_query returned %d", __func__, ret); | |
800 | *name = buffer_get_string(&m, NULL); | |
801 | *info = buffer_get_string(&m, NULL); | |
802 | *num = buffer_get_int(&m); | |
01d35895 | 803 | if (*num > PAM_MAX_NUM_MSG) |
804 | fatal("%s: recieved %u PAM messages, expected <= %u", | |
805 | __func__, *num, PAM_MAX_NUM_MSG); | |
806 | *prompts = xcalloc((*num + 1), sizeof(char *)); | |
807 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); | |
05114c74 | 808 | for (i = 0; i < *num; ++i) { |
809 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
810 | (*echo_on)[i] = buffer_get_int(&m); | |
811 | } | |
812 | buffer_free(&m); | |
813 | return (ret); | |
814 | } | |
815 | ||
816 | int | |
817 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
818 | { | |
819 | Buffer m; | |
a1a073cc | 820 | u_int i; |
821 | int ret; | |
05114c74 | 822 | |
823 | debug3("%s", __func__); | |
824 | buffer_init(&m); | |
825 | buffer_put_int(&m, num); | |
826 | for (i = 0; i < num; ++i) | |
827 | buffer_put_cstring(&m, resp[i]); | |
828 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
829 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
830 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
831 | ret = buffer_get_int(&m); | |
832 | debug3("%s: pam_respond returned %d", __func__, ret); | |
833 | buffer_free(&m); | |
834 | return (ret); | |
835 | } | |
836 | ||
837 | void | |
838 | mm_sshpam_free_ctx(void *ctxtp) | |
839 | { | |
840 | Buffer m; | |
841 | ||
842 | debug3("%s", __func__); | |
843 | buffer_init(&m); | |
844 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
845 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
846 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
847 | buffer_free(&m); | |
848 | } | |
ad200abb | 849 | #endif /* USE_PAM */ |
850 | ||
1853d1ef | 851 | /* Request process termination */ |
852 | ||
853 | void | |
854 | mm_terminate(void) | |
855 | { | |
856 | Buffer m; | |
857 | ||
858 | buffer_init(&m); | |
b5a28cbc | 859 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 860 | buffer_free(&m); |
861 | } | |
862 | ||
863 | int | |
864 | mm_ssh1_session_key(BIGNUM *num) | |
865 | { | |
866 | int rsafail; | |
867 | Buffer m; | |
868 | ||
869 | buffer_init(&m); | |
870 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 871 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 872 | |
b5a28cbc | 873 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 874 | |
875 | rsafail = buffer_get_int(&m); | |
876 | buffer_get_bignum2(&m, num); | |
877 | ||
878 | buffer_free(&m); | |
879 | ||
880 | return (rsafail); | |
881 | } | |
882 | ||
883 | static void | |
884 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
885 | char ***prompts, u_int **echo_on) | |
886 | { | |
7203d6bb | 887 | *name = xstrdup(""); |
888 | *infotxt = xstrdup(""); | |
1853d1ef | 889 | *numprompts = 1; |
52e3daed | 890 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
891 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
1853d1ef | 892 | (*echo_on)[0] = 0; |
893 | } | |
894 | ||
895 | int | |
896 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
897 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
898 | { | |
899 | Buffer m; | |
6d6c25e3 | 900 | u_int success; |
1853d1ef | 901 | char *challenge; |
902 | ||
1588c277 | 903 | debug3("%s: entering", __func__); |
1853d1ef | 904 | |
905 | buffer_init(&m); | |
b5a28cbc | 906 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 907 | |
b5a28cbc | 908 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 909 | &m); |
6d6c25e3 | 910 | success = buffer_get_int(&m); |
911 | if (success == 0) { | |
1588c277 | 912 | debug3("%s: no challenge", __func__); |
1853d1ef | 913 | buffer_free(&m); |
914 | return (-1); | |
915 | } | |
916 | ||
917 | /* Get the challenge, and format the response */ | |
918 | challenge = buffer_get_string(&m, NULL); | |
919 | buffer_free(&m); | |
920 | ||
921 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
922 | (*prompts)[0] = challenge; | |
923 | ||
1588c277 | 924 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 925 | |
926 | return (0); | |
927 | } | |
928 | ||
929 | int | |
930 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
931 | { | |
932 | Buffer m; | |
933 | int authok; | |
934 | ||
1588c277 | 935 | debug3("%s: entering", __func__); |
1853d1ef | 936 | if (numresponses != 1) |
937 | return (-1); | |
938 | ||
939 | buffer_init(&m); | |
940 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 941 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 942 | |
b5a28cbc | 943 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 944 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
945 | ||
946 | authok = buffer_get_int(&m); | |
947 | buffer_free(&m); | |
948 | ||
949 | return ((authok == 0) ? -1 : 0); | |
950 | } | |
951 | ||
77751377 | 952 | #ifdef SKEY |
1853d1ef | 953 | int |
954 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
955 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
956 | { | |
957 | Buffer m; | |
6d6c25e3 | 958 | u_int success; |
cecc422f | 959 | char *challenge; |
1853d1ef | 960 | |
1588c277 | 961 | debug3("%s: entering", __func__); |
1853d1ef | 962 | |
963 | buffer_init(&m); | |
b5a28cbc | 964 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 965 | |
b5a28cbc | 966 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 967 | &m); |
6d6c25e3 | 968 | success = buffer_get_int(&m); |
969 | if (success == 0) { | |
1588c277 | 970 | debug3("%s: no challenge", __func__); |
1853d1ef | 971 | buffer_free(&m); |
972 | return (-1); | |
973 | } | |
974 | ||
975 | /* Get the challenge, and format the response */ | |
976 | challenge = buffer_get_string(&m, NULL); | |
977 | buffer_free(&m); | |
978 | ||
1588c277 | 979 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 980 | |
981 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
982 | ||
52e3daed | 983 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
1853d1ef | 984 | xfree(challenge); |
985 | ||
986 | return (0); | |
987 | } | |
988 | ||
989 | int | |
990 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
991 | { | |
992 | Buffer m; | |
993 | int authok; | |
994 | ||
1588c277 | 995 | debug3("%s: entering", __func__); |
1853d1ef | 996 | if (numresponses != 1) |
997 | return (-1); | |
998 | ||
999 | buffer_init(&m); | |
1000 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 1001 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 1002 | |
b5a28cbc | 1003 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 1004 | MONITOR_ANS_SKEYRESPOND, &m); |
1005 | ||
1006 | authok = buffer_get_int(&m); | |
1007 | buffer_free(&m); | |
1008 | ||
1009 | return ((authok == 0) ? -1 : 0); | |
1010 | } | |
77751377 | 1011 | #endif /* SKEY */ |
1853d1ef | 1012 | |
1013 | void | |
1014 | mm_ssh1_session_id(u_char session_id[16]) | |
1015 | { | |
1016 | Buffer m; | |
1017 | int i; | |
1018 | ||
1588c277 | 1019 | debug3("%s entering", __func__); |
1853d1ef | 1020 | |
1021 | buffer_init(&m); | |
1022 | for (i = 0; i < 16; i++) | |
1023 | buffer_put_char(&m, session_id[i]); | |
1024 | ||
b5a28cbc | 1025 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 1026 | buffer_free(&m); |
1027 | } | |
1028 | ||
1029 | int | |
1030 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1031 | { | |
1032 | Buffer m; | |
1033 | Key *key; | |
1034 | u_char *blob; | |
1035 | u_int blen; | |
92e15201 | 1036 | int allowed = 0, have_forced = 0; |
1853d1ef | 1037 | |
1588c277 | 1038 | debug3("%s entering", __func__); |
1853d1ef | 1039 | |
1040 | buffer_init(&m); | |
1041 | buffer_put_bignum2(&m, client_n); | |
1042 | ||
b5a28cbc | 1043 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1044 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1045 | |
1046 | allowed = buffer_get_int(&m); | |
1047 | ||
92e15201 | 1048 | /* fake forced command */ |
1049 | auth_clear_options(); | |
1050 | have_forced = buffer_get_int(&m); | |
1051 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1052 | ||
1853d1ef | 1053 | if (allowed && rkey != NULL) { |
1054 | blob = buffer_get_string(&m, &blen); | |
1055 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1056 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1057 | *rkey = key; |
1058 | xfree(blob); | |
1059 | } | |
1060 | mm_send_debug(&m); | |
1061 | buffer_free(&m); | |
1062 | ||
1063 | return (allowed); | |
1064 | } | |
1065 | ||
1066 | BIGNUM * | |
1067 | mm_auth_rsa_generate_challenge(Key *key) | |
1068 | { | |
1069 | Buffer m; | |
1070 | BIGNUM *challenge; | |
1071 | u_char *blob; | |
1072 | u_int blen; | |
1073 | ||
1588c277 | 1074 | debug3("%s entering", __func__); |
1853d1ef | 1075 | |
1076 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1077 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1078 | |
1079 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1080 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1081 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1082 | key->type = KEY_RSA1; |
1083 | ||
1084 | buffer_init(&m); | |
1085 | buffer_put_string(&m, blob, blen); | |
1086 | xfree(blob); | |
1087 | ||
b5a28cbc | 1088 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1089 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1090 | |
1091 | buffer_get_bignum2(&m, challenge); | |
1092 | buffer_free(&m); | |
1093 | ||
1094 | return (challenge); | |
1095 | } | |
1096 | ||
1097 | int | |
1098 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1099 | { | |
1100 | Buffer m; | |
1101 | u_char *blob; | |
1102 | u_int blen; | |
1103 | int success = 0; | |
1104 | ||
1588c277 | 1105 | debug3("%s entering", __func__); |
1853d1ef | 1106 | |
1107 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1108 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1109 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1110 | key->type = KEY_RSA1; |
1111 | ||
1112 | buffer_init(&m); | |
1113 | buffer_put_string(&m, blob, blen); | |
1114 | buffer_put_string(&m, response, 16); | |
1115 | xfree(blob); | |
1116 | ||
b5a28cbc | 1117 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1118 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1119 | |
1120 | success = buffer_get_int(&m); | |
1121 | buffer_free(&m); | |
1122 | ||
1123 | return (success); | |
1124 | } | |
696f6bef | 1125 | |
6039eeef | 1126 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 1127 | void |
1128 | mm_audit_event(ssh_audit_event_t event) | |
1129 | { | |
1130 | Buffer m; | |
1131 | ||
1132 | debug3("%s entering", __func__); | |
1133 | ||
1134 | buffer_init(&m); | |
1135 | buffer_put_int(&m, event); | |
1136 | ||
1137 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1138 | buffer_free(&m); | |
1139 | } | |
1140 | ||
1141 | void | |
1142 | mm_audit_run_command(const char *command) | |
1143 | { | |
1144 | Buffer m; | |
1145 | ||
1146 | debug3("%s entering command %s", __func__, command); | |
1147 | ||
1148 | buffer_init(&m); | |
1149 | buffer_put_cstring(&m, command); | |
1150 | ||
1151 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1152 | buffer_free(&m); | |
1153 | } | |
6039eeef | 1154 | #endif /* SSH_AUDIT_EVENTS */ |
c00e4d75 | 1155 | |
7364bd04 | 1156 | #ifdef GSSAPI |
1157 | OM_uint32 | |
ca75d7de | 1158 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1159 | { |
1160 | Buffer m; | |
1161 | OM_uint32 major; | |
1162 | ||
1163 | /* Client doesn't get to see the context */ | |
1164 | *ctx = NULL; | |
1165 | ||
1166 | buffer_init(&m); | |
ca75d7de | 1167 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1168 | |
1169 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1170 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1171 | ||
1172 | major = buffer_get_int(&m); | |
1173 | ||
1174 | buffer_free(&m); | |
1175 | return (major); | |
1176 | } | |
1177 | ||
1178 | OM_uint32 | |
1179 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1180 | gss_buffer_desc *out, OM_uint32 *flags) | |
1181 | { | |
1182 | Buffer m; | |
1183 | OM_uint32 major; | |
f99e1ca4 | 1184 | u_int len; |
7364bd04 | 1185 | |
1186 | buffer_init(&m); | |
1187 | buffer_put_string(&m, in->value, in->length); | |
1188 | ||
1189 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1190 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1191 | ||
1192 | major = buffer_get_int(&m); | |
f99e1ca4 | 1193 | out->value = buffer_get_string(&m, &len); |
1194 | out->length = len; | |
7364bd04 | 1195 | if (flags) |
1196 | *flags = buffer_get_int(&m); | |
1197 | ||
1198 | buffer_free(&m); | |
1199 | ||
1200 | return (major); | |
1201 | } | |
1202 | ||
0789992b | 1203 | OM_uint32 |
1204 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1205 | { | |
1206 | Buffer m; | |
1207 | OM_uint32 major; | |
1208 | ||
1209 | buffer_init(&m); | |
1210 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1211 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1212 | ||
1213 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1214 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1215 | &m); | |
1216 | ||
1217 | major = buffer_get_int(&m); | |
1218 | buffer_free(&m); | |
1219 | return(major); | |
1220 | } | |
1221 | ||
7364bd04 | 1222 | int |
1223 | mm_ssh_gssapi_userok(char *user) | |
1224 | { | |
1225 | Buffer m; | |
1226 | int authenticated = 0; | |
1227 | ||
1228 | buffer_init(&m); | |
1229 | ||
1230 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1231 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1232 | &m); | |
1233 | ||
1234 | authenticated = buffer_get_int(&m); | |
1235 | ||
1236 | buffer_free(&m); | |
1237 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1238 | return (authenticated); | |
1239 | } | |
1240 | #endif /* GSSAPI */ |