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cecc422f | 1 | /* $OpenBSD: monitor_wrap.c,v 1.52 2006/08/05 08:28:24 dtucker 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> |
cf851879 | 36 | #include <stdio.h> |
00146caa | 37 | #include <string.h> |
428f6258 | 38 | #include <unistd.h> |
b1842393 | 39 | |
31652869 | 40 | #include <openssl/bn.h> |
41 | #include <openssl/dh.h> | |
42 | ||
43 | #include "xmalloc.h" | |
1853d1ef | 44 | #include "ssh.h" |
45 | #include "dh.h" | |
31652869 | 46 | #include "buffer.h" |
47 | #include "key.h" | |
48 | #include "cipher.h" | |
1853d1ef | 49 | #include "kex.h" |
31652869 | 50 | #include "hostfile.h" |
1853d1ef | 51 | #include "auth.h" |
92e15201 | 52 | #include "auth-options.h" |
1853d1ef | 53 | #include "packet.h" |
54 | #include "mac.h" | |
55 | #include "log.h" | |
a655c012 | 56 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
57 | #undef TARGET_OS_MAC | |
9b08c23f | 58 | #include "zlib.h" |
a655c012 | 59 | #define TARGET_OS_MAC 1 |
60 | #else | |
61 | #include "zlib.h" | |
62 | #endif | |
1853d1ef | 63 | #include "monitor.h" |
31652869 | 64 | #ifdef GSSAPI |
65 | #include "ssh-gss.h" | |
66 | #endif | |
1853d1ef | 67 | #include "monitor_wrap.h" |
1853d1ef | 68 | #include "atomicio.h" |
69 | #include "monitor_fdpass.h" | |
51e7a012 | 70 | #include "misc.h" |
7fceb20d | 71 | #include "servconf.h" |
1853d1ef | 72 | |
1853d1ef | 73 | #include "channels.h" |
74 | #include "session.h" | |
75 | ||
76 | /* Imports */ | |
77 | extern int compat20; | |
78 | extern Newkeys *newkeys[]; | |
79 | extern z_stream incoming_stream; | |
80 | extern z_stream outgoing_stream; | |
b5a28cbc | 81 | extern struct monitor *pmonitor; |
1853d1ef | 82 | extern Buffer input, output; |
be2ca0c9 | 83 | extern Buffer loginmsg; |
7fceb20d | 84 | extern ServerOptions options; |
1853d1ef | 85 | |
2362db19 | 86 | int |
87 | mm_is_monitor(void) | |
88 | { | |
89 | /* | |
90 | * m_pid is only set in the privileged part, and | |
91 | * points to the unprivileged child. | |
92 | */ | |
74677ba3 | 93 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 94 | } |
95 | ||
1853d1ef | 96 | void |
ca75d7de | 97 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 98 | { |
1853d1ef | 99 | u_int mlen = buffer_len(m); |
405a0d43 | 100 | u_char buf[5]; |
1853d1ef | 101 | |
1588c277 | 102 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 103 | |
51e7a012 | 104 | put_u32(buf, mlen + 1); |
7203d6bb | 105 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
ca75d7de | 106 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
05624c18 | 107 | fatal("%s: write: %s", __func__, strerror(errno)); |
ca75d7de | 108 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
05624c18 | 109 | fatal("%s: write: %s", __func__, strerror(errno)); |
1853d1ef | 110 | } |
111 | ||
112 | void | |
ca75d7de | 113 | mm_request_receive(int sock, Buffer *m) |
1853d1ef | 114 | { |
115 | u_char buf[4]; | |
1853d1ef | 116 | u_int msg_len; |
117 | ||
1588c277 | 118 | debug3("%s entering", __func__); |
1853d1ef | 119 | |
05624c18 | 120 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
121 | if (errno == EPIPE) | |
2362db19 | 122 | cleanup_exit(255); |
05624c18 | 123 | fatal("%s: read: %s", __func__, strerror(errno)); |
1853d1ef | 124 | } |
51e7a012 | 125 | msg_len = get_u32(buf); |
1853d1ef | 126 | if (msg_len > 256 * 1024) |
1588c277 | 127 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 128 | buffer_clear(m); |
129 | buffer_append_space(m, msg_len); | |
05624c18 | 130 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
131 | fatal("%s: read: %s", __func__, strerror(errno)); | |
1853d1ef | 132 | } |
133 | ||
134 | void | |
ca75d7de | 135 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 136 | { |
137 | u_char rtype; | |
138 | ||
1588c277 | 139 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 140 | |
ca75d7de | 141 | mm_request_receive(sock, m); |
1853d1ef | 142 | rtype = buffer_get_char(m); |
143 | if (rtype != type) | |
1588c277 | 144 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 145 | rtype, type); |
146 | } | |
147 | ||
148 | DH * | |
149 | mm_choose_dh(int min, int nbits, int max) | |
150 | { | |
151 | BIGNUM *p, *g; | |
152 | int success = 0; | |
153 | Buffer m; | |
154 | ||
155 | buffer_init(&m); | |
156 | buffer_put_int(&m, min); | |
157 | buffer_put_int(&m, nbits); | |
158 | buffer_put_int(&m, max); | |
159 | ||
b5a28cbc | 160 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 161 | |
1588c277 | 162 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 163 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 164 | |
165 | success = buffer_get_char(&m); | |
166 | if (success == 0) | |
1588c277 | 167 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 168 | |
169 | if ((p = BN_new()) == NULL) | |
1588c277 | 170 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 171 | if ((g = BN_new()) == NULL) |
1588c277 | 172 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 173 | buffer_get_bignum2(&m, p); |
174 | buffer_get_bignum2(&m, g); | |
175 | ||
1588c277 | 176 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 177 | buffer_free(&m); |
178 | ||
179 | return (dh_new_group(g, p)); | |
180 | } | |
181 | ||
182 | int | |
183 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
184 | { | |
b5a28cbc | 185 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 186 | Buffer m; |
187 | ||
1588c277 | 188 | debug3("%s entering", __func__); |
1853d1ef | 189 | |
190 | buffer_init(&m); | |
191 | buffer_put_int(&m, kex->host_key_index(key)); | |
192 | buffer_put_string(&m, data, datalen); | |
193 | ||
b5a28cbc | 194 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 195 | |
1588c277 | 196 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 197 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 198 | *sigp = buffer_get_string(&m, lenp); |
199 | buffer_free(&m); | |
200 | ||
201 | return (0); | |
202 | } | |
203 | ||
204 | struct passwd * | |
18a8f313 | 205 | mm_getpwnamallow(const char *username) |
1853d1ef | 206 | { |
207 | Buffer m; | |
208 | struct passwd *pw; | |
209 | u_int pwlen; | |
210 | ||
1588c277 | 211 | debug3("%s entering", __func__); |
1853d1ef | 212 | |
213 | buffer_init(&m); | |
18a8f313 | 214 | buffer_put_cstring(&m, username); |
1853d1ef | 215 | |
b5a28cbc | 216 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 217 | |
1588c277 | 218 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 219 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 220 | |
221 | if (buffer_get_char(&m) == 0) { | |
222 | buffer_free(&m); | |
223 | return (NULL); | |
224 | } | |
225 | pw = buffer_get_string(&m, &pwlen); | |
226 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 227 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 228 | pw->pw_name = buffer_get_string(&m, NULL); |
229 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
230 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 231 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 232 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 233 | #endif |
1853d1ef | 234 | pw->pw_dir = buffer_get_string(&m, NULL); |
235 | pw->pw_shell = buffer_get_string(&m, NULL); | |
236 | buffer_free(&m); | |
237 | ||
238 | return (pw); | |
239 | } | |
240 | ||
02cd6c56 | 241 | char * |
242 | mm_auth2_read_banner(void) | |
94a73cdc | 243 | { |
244 | Buffer m; | |
245 | char *banner; | |
246 | ||
1588c277 | 247 | debug3("%s entering", __func__); |
94a73cdc | 248 | |
249 | buffer_init(&m); | |
b5a28cbc | 250 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 251 | buffer_clear(&m); |
252 | ||
02cd6c56 | 253 | mm_request_receive_expect(pmonitor->m_recvfd, |
254 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 255 | banner = buffer_get_string(&m, NULL); |
256 | buffer_free(&m); | |
7203d6bb | 257 | |
02cd6c56 | 258 | /* treat empty banner as missing banner */ |
259 | if (strlen(banner) == 0) { | |
260 | xfree(banner); | |
261 | banner = NULL; | |
262 | } | |
94a73cdc | 263 | return (banner); |
264 | } | |
265 | ||
1853d1ef | 266 | /* Inform the privileged process about service and style */ |
267 | ||
268 | void | |
269 | mm_inform_authserv(char *service, char *style) | |
270 | { | |
271 | Buffer m; | |
272 | ||
1588c277 | 273 | debug3("%s entering", __func__); |
1853d1ef | 274 | |
275 | buffer_init(&m); | |
276 | buffer_put_cstring(&m, service); | |
277 | buffer_put_cstring(&m, style ? style : ""); | |
278 | ||
b5a28cbc | 279 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 280 | |
281 | buffer_free(&m); | |
282 | } | |
283 | ||
284 | /* Do the password authentication */ | |
285 | int | |
286 | mm_auth_password(Authctxt *authctxt, char *password) | |
287 | { | |
288 | Buffer m; | |
289 | int authenticated = 0; | |
290 | ||
1588c277 | 291 | debug3("%s entering", __func__); |
1853d1ef | 292 | |
293 | buffer_init(&m); | |
294 | buffer_put_cstring(&m, password); | |
b5a28cbc | 295 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 296 | |
1588c277 | 297 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 298 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 299 | |
300 | authenticated = buffer_get_int(&m); | |
301 | ||
302 | buffer_free(&m); | |
303 | ||
304 | debug3("%s: user %sauthenticated", | |
1588c277 | 305 | __func__, authenticated ? "" : "not "); |
1853d1ef | 306 | return (authenticated); |
307 | } | |
308 | ||
309 | int | |
310 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
311 | { | |
312 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
313 | } | |
314 | ||
315 | int | |
316 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
317 | Key *key) | |
318 | { | |
319 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
320 | } | |
321 | ||
322 | int | |
323 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
324 | char *host, Key *key) | |
325 | { | |
326 | int ret; | |
327 | ||
328 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
329 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
330 | key->type = KEY_RSA1; | |
331 | return (ret); | |
332 | } | |
333 | ||
334 | static void | |
335 | mm_send_debug(Buffer *m) | |
336 | { | |
337 | char *msg; | |
338 | ||
339 | while (buffer_len(m)) { | |
340 | msg = buffer_get_string(m, NULL); | |
1588c277 | 341 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 342 | packet_send_debug("%s", msg); |
343 | xfree(msg); | |
344 | } | |
345 | } | |
346 | ||
347 | int | |
348 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
349 | { | |
350 | Buffer m; | |
351 | u_char *blob; | |
352 | u_int len; | |
92e15201 | 353 | int allowed = 0, have_forced = 0; |
1853d1ef | 354 | |
1588c277 | 355 | debug3("%s entering", __func__); |
1853d1ef | 356 | |
357 | /* Convert the key to a blob and the pass it over */ | |
358 | if (!key_to_blob(key, &blob, &len)) | |
359 | return (0); | |
360 | ||
361 | buffer_init(&m); | |
362 | buffer_put_int(&m, type); | |
363 | buffer_put_cstring(&m, user ? user : ""); | |
364 | buffer_put_cstring(&m, host ? host : ""); | |
365 | buffer_put_string(&m, blob, len); | |
366 | xfree(blob); | |
367 | ||
b5a28cbc | 368 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 369 | |
1588c277 | 370 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 371 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 372 | |
373 | allowed = buffer_get_int(&m); | |
374 | ||
92e15201 | 375 | /* fake forced command */ |
376 | auth_clear_options(); | |
377 | have_forced = buffer_get_int(&m); | |
378 | forced_command = have_forced ? xstrdup("true") : NULL; | |
379 | ||
1853d1ef | 380 | /* Send potential debug messages */ |
381 | mm_send_debug(&m); | |
382 | ||
383 | buffer_free(&m); | |
384 | ||
385 | return (allowed); | |
386 | } | |
387 | ||
388 | /* | |
389 | * This key verify needs to send the key type along, because the | |
390 | * privileged parent makes the decision if the key is allowed | |
391 | * for authentication. | |
392 | */ | |
393 | ||
394 | int | |
395 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
396 | { | |
397 | Buffer m; | |
398 | u_char *blob; | |
399 | u_int len; | |
400 | int verified = 0; | |
401 | ||
1588c277 | 402 | debug3("%s entering", __func__); |
1853d1ef | 403 | |
404 | /* Convert the key to a blob and the pass it over */ | |
405 | if (!key_to_blob(key, &blob, &len)) | |
406 | return (0); | |
407 | ||
408 | buffer_init(&m); | |
409 | buffer_put_string(&m, blob, len); | |
410 | buffer_put_string(&m, sig, siglen); | |
411 | buffer_put_string(&m, data, datalen); | |
412 | xfree(blob); | |
413 | ||
b5a28cbc | 414 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 415 | |
1588c277 | 416 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 417 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 418 | |
419 | verified = buffer_get_int(&m); | |
420 | ||
421 | buffer_free(&m); | |
422 | ||
423 | return (verified); | |
424 | } | |
425 | ||
426 | /* Export key state after authentication */ | |
427 | Newkeys * | |
428 | mm_newkeys_from_blob(u_char *blob, int blen) | |
429 | { | |
430 | Buffer b; | |
431 | u_int len; | |
432 | Newkeys *newkey = NULL; | |
433 | Enc *enc; | |
434 | Mac *mac; | |
435 | Comp *comp; | |
436 | ||
1588c277 | 437 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 438 | #ifdef DEBUG_PK |
439 | dump_base64(stderr, blob, blen); | |
440 | #endif | |
441 | buffer_init(&b); | |
442 | buffer_append(&b, blob, blen); | |
443 | ||
444 | newkey = xmalloc(sizeof(*newkey)); | |
445 | enc = &newkey->enc; | |
446 | mac = &newkey->mac; | |
447 | comp = &newkey->comp; | |
448 | ||
449 | /* Enc structure */ | |
450 | enc->name = buffer_get_string(&b, NULL); | |
451 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
452 | enc->enabled = buffer_get_int(&b); | |
453 | enc->block_size = buffer_get_int(&b); | |
454 | enc->key = buffer_get_string(&b, &enc->key_len); | |
455 | enc->iv = buffer_get_string(&b, &len); | |
456 | if (len != enc->block_size) | |
bb0640b2 | 457 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 458 | enc->block_size, len); |
459 | ||
460 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 461 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 462 | enc->name, enc->cipher); |
463 | ||
464 | /* Mac structure */ | |
465 | mac->name = buffer_get_string(&b, NULL); | |
466 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 467 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 468 | mac->enabled = buffer_get_int(&b); |
469 | mac->key = buffer_get_string(&b, &len); | |
470 | if (len > mac->key_len) | |
bb0640b2 | 471 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 472 | mac->key_len); |
473 | mac->key_len = len; | |
474 | ||
475 | /* Comp structure */ | |
476 | comp->type = buffer_get_int(&b); | |
477 | comp->enabled = buffer_get_int(&b); | |
478 | comp->name = buffer_get_string(&b, NULL); | |
479 | ||
480 | len = buffer_len(&b); | |
481 | if (len != 0) | |
bb0640b2 | 482 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 483 | buffer_free(&b); |
484 | return (newkey); | |
485 | } | |
486 | ||
487 | int | |
488 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
489 | { | |
490 | Buffer b; | |
491 | int len; | |
1853d1ef | 492 | Enc *enc; |
493 | Mac *mac; | |
494 | Comp *comp; | |
495 | Newkeys *newkey = newkeys[mode]; | |
496 | ||
1588c277 | 497 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 498 | |
499 | if (newkey == NULL) { | |
1588c277 | 500 | error("%s: newkey == NULL", __func__); |
1853d1ef | 501 | return 0; |
502 | } | |
503 | enc = &newkey->enc; | |
504 | mac = &newkey->mac; | |
505 | comp = &newkey->comp; | |
506 | ||
507 | buffer_init(&b); | |
508 | /* Enc structure */ | |
509 | buffer_put_cstring(&b, enc->name); | |
510 | /* The cipher struct is constant and shared, you export pointer */ | |
511 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
512 | buffer_put_int(&b, enc->enabled); | |
513 | buffer_put_int(&b, enc->block_size); | |
514 | buffer_put_string(&b, enc->key, enc->key_len); | |
515 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
516 | buffer_put_string(&b, enc->iv, enc->block_size); | |
517 | ||
518 | /* Mac structure */ | |
519 | buffer_put_cstring(&b, mac->name); | |
520 | buffer_put_int(&b, mac->enabled); | |
521 | buffer_put_string(&b, mac->key, mac->key_len); | |
522 | ||
523 | /* Comp structure */ | |
524 | buffer_put_int(&b, comp->type); | |
525 | buffer_put_int(&b, comp->enabled); | |
526 | buffer_put_cstring(&b, comp->name); | |
527 | ||
528 | len = buffer_len(&b); | |
1853d1ef | 529 | if (lenp != NULL) |
530 | *lenp = len; | |
eb9f2fab | 531 | if (blobp != NULL) { |
532 | *blobp = xmalloc(len); | |
533 | memcpy(*blobp, buffer_ptr(&b), len); | |
534 | } | |
535 | memset(buffer_ptr(&b), 0, len); | |
536 | buffer_free(&b); | |
1853d1ef | 537 | return len; |
538 | } | |
539 | ||
540 | static void | |
541 | mm_send_kex(Buffer *m, Kex *kex) | |
542 | { | |
543 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
544 | buffer_put_int(m, kex->we_need); | |
545 | buffer_put_int(m, kex->hostkey_type); | |
546 | buffer_put_int(m, kex->kex_type); | |
547 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
548 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
549 | buffer_put_int(m, kex->flags); | |
550 | buffer_put_cstring(m, kex->client_version_string); | |
551 | buffer_put_cstring(m, kex->server_version_string); | |
552 | } | |
553 | ||
554 | void | |
ca75d7de | 555 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 556 | { |
557 | Buffer m; | |
558 | u_char *blob, *p; | |
559 | u_int bloblen, plen; | |
ffd7b36b | 560 | u_int32_t seqnr, packets; |
561 | u_int64_t blocks; | |
1853d1ef | 562 | |
563 | buffer_init(&m); | |
564 | ||
565 | if (!compat20) { | |
566 | u_char iv[24]; | |
9459414c | 567 | u_char *key; |
568 | u_int ivlen, keylen; | |
1853d1ef | 569 | |
570 | buffer_put_int(&m, packet_get_protocol_flags()); | |
571 | ||
572 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
573 | ||
9459414c | 574 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
575 | keylen = packet_get_encryption_key(NULL); | |
576 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
577 | keylen = packet_get_encryption_key(key); | |
578 | buffer_put_string(&m, key, keylen); | |
579 | memset(key, 0, keylen); | |
580 | xfree(key); | |
581 | ||
1853d1ef | 582 | ivlen = packet_get_keyiv_len(MODE_OUT); |
583 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
584 | buffer_put_string(&m, iv, ivlen); | |
585 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
586 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
587 | buffer_put_string(&m, iv, ivlen); | |
588 | goto skip; | |
589 | } else { | |
590 | /* Kex for rekeying */ | |
ca75d7de | 591 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 592 | } |
593 | ||
594 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 595 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 596 | |
597 | /* Keys from Kex */ | |
598 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 599 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 600 | |
601 | buffer_put_string(&m, blob, bloblen); | |
602 | xfree(blob); | |
603 | ||
604 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 605 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 606 | |
607 | buffer_put_string(&m, blob, bloblen); | |
608 | xfree(blob); | |
609 | ||
ffd7b36b | 610 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
611 | buffer_put_int(&m, seqnr); | |
612 | buffer_put_int64(&m, blocks); | |
613 | buffer_put_int(&m, packets); | |
806e4c11 | 614 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 615 | buffer_put_int(&m, seqnr); |
616 | buffer_put_int64(&m, blocks); | |
617 | buffer_put_int(&m, packets); | |
1853d1ef | 618 | |
1588c277 | 619 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 620 | skip: |
621 | /* More key context */ | |
622 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
623 | p = xmalloc(plen+1); | |
624 | packet_get_keycontext(MODE_OUT, p); | |
625 | buffer_put_string(&m, p, plen); | |
626 | xfree(p); | |
627 | ||
628 | plen = packet_get_keycontext(MODE_IN, NULL); | |
629 | p = xmalloc(plen+1); | |
630 | packet_get_keycontext(MODE_IN, p); | |
631 | buffer_put_string(&m, p, plen); | |
632 | xfree(p); | |
633 | ||
634 | /* Compression state */ | |
1588c277 | 635 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 636 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
637 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
638 | ||
639 | /* Network I/O buffers */ | |
640 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
641 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
642 | ||
ca75d7de | 643 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 644 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 645 | |
646 | buffer_free(&m); | |
647 | } | |
648 | ||
649 | int | |
148de80c | 650 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
1853d1ef | 651 | { |
652 | Buffer m; | |
be2ca0c9 | 653 | char *p, *msg; |
1853d1ef | 654 | int success = 0; |
655 | ||
656 | buffer_init(&m); | |
b5a28cbc | 657 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 658 | |
1588c277 | 659 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 660 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 661 | |
662 | success = buffer_get_int(&m); | |
663 | if (success == 0) { | |
1588c277 | 664 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 665 | buffer_free(&m); |
666 | return (0); | |
667 | } | |
668 | p = buffer_get_string(&m, NULL); | |
be2ca0c9 | 669 | msg = buffer_get_string(&m, NULL); |
1853d1ef | 670 | buffer_free(&m); |
671 | ||
672 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
673 | xfree(p); | |
674 | ||
be2ca0c9 | 675 | buffer_append(&loginmsg, msg, strlen(msg)); |
676 | xfree(msg); | |
677 | ||
b5a28cbc | 678 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
679 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 680 | |
681 | /* Success */ | |
682 | return (1); | |
683 | } | |
684 | ||
685 | void | |
2362db19 | 686 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 687 | { |
1853d1ef | 688 | Buffer m; |
689 | ||
690 | if (s->ttyfd == -1) | |
691 | return; | |
692 | buffer_init(&m); | |
693 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 694 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 695 | buffer_free(&m); |
696 | ||
697 | /* closed dup'ed master */ | |
698 | if (close(s->ptymaster) < 0) | |
699 | error("close(s->ptymaster): %s", strerror(errno)); | |
700 | ||
701 | /* unlink pty from session */ | |
702 | s->ttyfd = -1; | |
703 | } | |
704 | ||
ad200abb | 705 | #ifdef USE_PAM |
706 | void | |
529d73ab | 707 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 708 | { |
709 | Buffer m; | |
710 | ||
1588c277 | 711 | debug3("%s entering", __func__); |
7fceb20d | 712 | if (!options.use_pam) |
713 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 714 | |
715 | buffer_init(&m); | |
b5a28cbc | 716 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 717 | |
718 | buffer_free(&m); | |
719 | } | |
05114c74 | 720 | |
5b9e2464 | 721 | u_int |
722 | mm_do_pam_account(void) | |
723 | { | |
724 | Buffer m; | |
725 | u_int ret; | |
ba6dd90e | 726 | char *msg; |
5b9e2464 | 727 | |
728 | debug3("%s entering", __func__); | |
729 | if (!options.use_pam) | |
730 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
731 | ||
732 | buffer_init(&m); | |
733 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
734 | ||
aff51935 | 735 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 736 | MONITOR_ANS_PAM_ACCOUNT, &m); |
737 | ret = buffer_get_int(&m); | |
ba6dd90e | 738 | msg = buffer_get_string(&m, NULL); |
739 | buffer_append(&loginmsg, msg, strlen(msg)); | |
740 | xfree(msg); | |
5b9e2464 | 741 | |
742 | buffer_free(&m); | |
b6453d99 | 743 | |
5b9e2464 | 744 | debug3("%s returning %d", __func__, ret); |
745 | ||
746 | return (ret); | |
747 | } | |
748 | ||
05114c74 | 749 | void * |
750 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
751 | { | |
752 | Buffer m; | |
753 | int success; | |
754 | ||
755 | debug3("%s", __func__); | |
756 | buffer_init(&m); | |
757 | buffer_put_cstring(&m, authctxt->user); | |
758 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
759 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
760 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
761 | success = buffer_get_int(&m); | |
762 | if (success == 0) { | |
763 | debug3("%s: pam_init_ctx failed", __func__); | |
764 | buffer_free(&m); | |
765 | return (NULL); | |
766 | } | |
767 | buffer_free(&m); | |
768 | return (authctxt); | |
769 | } | |
770 | ||
771 | int | |
772 | mm_sshpam_query(void *ctx, char **name, char **info, | |
773 | u_int *num, char ***prompts, u_int **echo_on) | |
774 | { | |
775 | Buffer m; | |
a1a073cc | 776 | u_int i; |
777 | int ret; | |
05114c74 | 778 | |
779 | debug3("%s", __func__); | |
780 | buffer_init(&m); | |
781 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
782 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
783 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
784 | ret = buffer_get_int(&m); | |
785 | debug3("%s: pam_query returned %d", __func__, ret); | |
786 | *name = buffer_get_string(&m, NULL); | |
787 | *info = buffer_get_string(&m, NULL); | |
788 | *num = buffer_get_int(&m); | |
01d35895 | 789 | if (*num > PAM_MAX_NUM_MSG) |
790 | fatal("%s: recieved %u PAM messages, expected <= %u", | |
791 | __func__, *num, PAM_MAX_NUM_MSG); | |
792 | *prompts = xcalloc((*num + 1), sizeof(char *)); | |
793 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); | |
05114c74 | 794 | for (i = 0; i < *num; ++i) { |
795 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
796 | (*echo_on)[i] = buffer_get_int(&m); | |
797 | } | |
798 | buffer_free(&m); | |
799 | return (ret); | |
800 | } | |
801 | ||
802 | int | |
803 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
804 | { | |
805 | Buffer m; | |
a1a073cc | 806 | u_int i; |
807 | int ret; | |
05114c74 | 808 | |
809 | debug3("%s", __func__); | |
810 | buffer_init(&m); | |
811 | buffer_put_int(&m, num); | |
812 | for (i = 0; i < num; ++i) | |
813 | buffer_put_cstring(&m, resp[i]); | |
814 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
815 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
816 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
817 | ret = buffer_get_int(&m); | |
818 | debug3("%s: pam_respond returned %d", __func__, ret); | |
819 | buffer_free(&m); | |
820 | return (ret); | |
821 | } | |
822 | ||
823 | void | |
824 | mm_sshpam_free_ctx(void *ctxtp) | |
825 | { | |
826 | Buffer m; | |
827 | ||
828 | debug3("%s", __func__); | |
829 | buffer_init(&m); | |
830 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
831 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
832 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
833 | buffer_free(&m); | |
834 | } | |
ad200abb | 835 | #endif /* USE_PAM */ |
836 | ||
1853d1ef | 837 | /* Request process termination */ |
838 | ||
839 | void | |
840 | mm_terminate(void) | |
841 | { | |
842 | Buffer m; | |
843 | ||
844 | buffer_init(&m); | |
b5a28cbc | 845 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 846 | buffer_free(&m); |
847 | } | |
848 | ||
849 | int | |
850 | mm_ssh1_session_key(BIGNUM *num) | |
851 | { | |
852 | int rsafail; | |
853 | Buffer m; | |
854 | ||
855 | buffer_init(&m); | |
856 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 857 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 858 | |
b5a28cbc | 859 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 860 | |
861 | rsafail = buffer_get_int(&m); | |
862 | buffer_get_bignum2(&m, num); | |
863 | ||
864 | buffer_free(&m); | |
865 | ||
866 | return (rsafail); | |
867 | } | |
868 | ||
869 | static void | |
870 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
871 | char ***prompts, u_int **echo_on) | |
872 | { | |
7203d6bb | 873 | *name = xstrdup(""); |
874 | *infotxt = xstrdup(""); | |
1853d1ef | 875 | *numprompts = 1; |
52e3daed | 876 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
877 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
1853d1ef | 878 | (*echo_on)[0] = 0; |
879 | } | |
880 | ||
881 | int | |
882 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
883 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
884 | { | |
885 | Buffer m; | |
6d6c25e3 | 886 | u_int success; |
1853d1ef | 887 | char *challenge; |
888 | ||
1588c277 | 889 | debug3("%s: entering", __func__); |
1853d1ef | 890 | |
891 | buffer_init(&m); | |
b5a28cbc | 892 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 893 | |
b5a28cbc | 894 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 895 | &m); |
6d6c25e3 | 896 | success = buffer_get_int(&m); |
897 | if (success == 0) { | |
1588c277 | 898 | debug3("%s: no challenge", __func__); |
1853d1ef | 899 | buffer_free(&m); |
900 | return (-1); | |
901 | } | |
902 | ||
903 | /* Get the challenge, and format the response */ | |
904 | challenge = buffer_get_string(&m, NULL); | |
905 | buffer_free(&m); | |
906 | ||
907 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
908 | (*prompts)[0] = challenge; | |
909 | ||
1588c277 | 910 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 911 | |
912 | return (0); | |
913 | } | |
914 | ||
915 | int | |
916 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
917 | { | |
918 | Buffer m; | |
919 | int authok; | |
920 | ||
1588c277 | 921 | debug3("%s: entering", __func__); |
1853d1ef | 922 | if (numresponses != 1) |
923 | return (-1); | |
924 | ||
925 | buffer_init(&m); | |
926 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 927 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 928 | |
b5a28cbc | 929 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 930 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
931 | ||
932 | authok = buffer_get_int(&m); | |
933 | buffer_free(&m); | |
934 | ||
935 | return ((authok == 0) ? -1 : 0); | |
936 | } | |
937 | ||
77751377 | 938 | #ifdef SKEY |
1853d1ef | 939 | int |
940 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
941 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
942 | { | |
943 | Buffer m; | |
6d6c25e3 | 944 | u_int success; |
cecc422f | 945 | char *challenge; |
1853d1ef | 946 | |
1588c277 | 947 | debug3("%s: entering", __func__); |
1853d1ef | 948 | |
949 | buffer_init(&m); | |
b5a28cbc | 950 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 951 | |
b5a28cbc | 952 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 953 | &m); |
6d6c25e3 | 954 | success = buffer_get_int(&m); |
955 | if (success == 0) { | |
1588c277 | 956 | debug3("%s: no challenge", __func__); |
1853d1ef | 957 | buffer_free(&m); |
958 | return (-1); | |
959 | } | |
960 | ||
961 | /* Get the challenge, and format the response */ | |
962 | challenge = buffer_get_string(&m, NULL); | |
963 | buffer_free(&m); | |
964 | ||
1588c277 | 965 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 966 | |
967 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
968 | ||
52e3daed | 969 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
1853d1ef | 970 | xfree(challenge); |
971 | ||
972 | return (0); | |
973 | } | |
974 | ||
975 | int | |
976 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
977 | { | |
978 | Buffer m; | |
979 | int authok; | |
980 | ||
1588c277 | 981 | debug3("%s: entering", __func__); |
1853d1ef | 982 | if (numresponses != 1) |
983 | return (-1); | |
984 | ||
985 | buffer_init(&m); | |
986 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 987 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 988 | |
b5a28cbc | 989 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 990 | MONITOR_ANS_SKEYRESPOND, &m); |
991 | ||
992 | authok = buffer_get_int(&m); | |
993 | buffer_free(&m); | |
994 | ||
995 | return ((authok == 0) ? -1 : 0); | |
996 | } | |
77751377 | 997 | #endif /* SKEY */ |
1853d1ef | 998 | |
999 | void | |
1000 | mm_ssh1_session_id(u_char session_id[16]) | |
1001 | { | |
1002 | Buffer m; | |
1003 | int i; | |
1004 | ||
1588c277 | 1005 | debug3("%s entering", __func__); |
1853d1ef | 1006 | |
1007 | buffer_init(&m); | |
1008 | for (i = 0; i < 16; i++) | |
1009 | buffer_put_char(&m, session_id[i]); | |
1010 | ||
b5a28cbc | 1011 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 1012 | buffer_free(&m); |
1013 | } | |
1014 | ||
1015 | int | |
1016 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1017 | { | |
1018 | Buffer m; | |
1019 | Key *key; | |
1020 | u_char *blob; | |
1021 | u_int blen; | |
92e15201 | 1022 | int allowed = 0, have_forced = 0; |
1853d1ef | 1023 | |
1588c277 | 1024 | debug3("%s entering", __func__); |
1853d1ef | 1025 | |
1026 | buffer_init(&m); | |
1027 | buffer_put_bignum2(&m, client_n); | |
1028 | ||
b5a28cbc | 1029 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1030 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1031 | |
1032 | allowed = buffer_get_int(&m); | |
1033 | ||
92e15201 | 1034 | /* fake forced command */ |
1035 | auth_clear_options(); | |
1036 | have_forced = buffer_get_int(&m); | |
1037 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1038 | ||
1853d1ef | 1039 | if (allowed && rkey != NULL) { |
1040 | blob = buffer_get_string(&m, &blen); | |
1041 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1042 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1043 | *rkey = key; |
1044 | xfree(blob); | |
1045 | } | |
1046 | mm_send_debug(&m); | |
1047 | buffer_free(&m); | |
1048 | ||
1049 | return (allowed); | |
1050 | } | |
1051 | ||
1052 | BIGNUM * | |
1053 | mm_auth_rsa_generate_challenge(Key *key) | |
1054 | { | |
1055 | Buffer m; | |
1056 | BIGNUM *challenge; | |
1057 | u_char *blob; | |
1058 | u_int blen; | |
1059 | ||
1588c277 | 1060 | debug3("%s entering", __func__); |
1853d1ef | 1061 | |
1062 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1063 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1064 | |
1065 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1066 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1067 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1068 | key->type = KEY_RSA1; |
1069 | ||
1070 | buffer_init(&m); | |
1071 | buffer_put_string(&m, blob, blen); | |
1072 | xfree(blob); | |
1073 | ||
b5a28cbc | 1074 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1075 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1076 | |
1077 | buffer_get_bignum2(&m, challenge); | |
1078 | buffer_free(&m); | |
1079 | ||
1080 | return (challenge); | |
1081 | } | |
1082 | ||
1083 | int | |
1084 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1085 | { | |
1086 | Buffer m; | |
1087 | u_char *blob; | |
1088 | u_int blen; | |
1089 | int success = 0; | |
1090 | ||
1588c277 | 1091 | debug3("%s entering", __func__); |
1853d1ef | 1092 | |
1093 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1094 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1095 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1096 | key->type = KEY_RSA1; |
1097 | ||
1098 | buffer_init(&m); | |
1099 | buffer_put_string(&m, blob, blen); | |
1100 | buffer_put_string(&m, response, 16); | |
1101 | xfree(blob); | |
1102 | ||
b5a28cbc | 1103 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1104 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1105 | |
1106 | success = buffer_get_int(&m); | |
1107 | buffer_free(&m); | |
1108 | ||
1109 | return (success); | |
1110 | } | |
696f6bef | 1111 | |
6039eeef | 1112 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 1113 | void |
1114 | mm_audit_event(ssh_audit_event_t event) | |
1115 | { | |
1116 | Buffer m; | |
1117 | ||
1118 | debug3("%s entering", __func__); | |
1119 | ||
1120 | buffer_init(&m); | |
1121 | buffer_put_int(&m, event); | |
1122 | ||
1123 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1124 | buffer_free(&m); | |
1125 | } | |
1126 | ||
1127 | void | |
1128 | mm_audit_run_command(const char *command) | |
1129 | { | |
1130 | Buffer m; | |
1131 | ||
1132 | debug3("%s entering command %s", __func__, command); | |
1133 | ||
1134 | buffer_init(&m); | |
1135 | buffer_put_cstring(&m, command); | |
1136 | ||
1137 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1138 | buffer_free(&m); | |
1139 | } | |
6039eeef | 1140 | #endif /* SSH_AUDIT_EVENTS */ |
c00e4d75 | 1141 | |
7364bd04 | 1142 | #ifdef GSSAPI |
1143 | OM_uint32 | |
ca75d7de | 1144 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1145 | { |
1146 | Buffer m; | |
1147 | OM_uint32 major; | |
1148 | ||
1149 | /* Client doesn't get to see the context */ | |
1150 | *ctx = NULL; | |
1151 | ||
1152 | buffer_init(&m); | |
ca75d7de | 1153 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1154 | |
1155 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1156 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1157 | ||
1158 | major = buffer_get_int(&m); | |
1159 | ||
1160 | buffer_free(&m); | |
1161 | return (major); | |
1162 | } | |
1163 | ||
1164 | OM_uint32 | |
1165 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1166 | gss_buffer_desc *out, OM_uint32 *flags) | |
1167 | { | |
1168 | Buffer m; | |
1169 | OM_uint32 major; | |
f99e1ca4 | 1170 | u_int len; |
7364bd04 | 1171 | |
1172 | buffer_init(&m); | |
1173 | buffer_put_string(&m, in->value, in->length); | |
1174 | ||
1175 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1176 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1177 | ||
1178 | major = buffer_get_int(&m); | |
f99e1ca4 | 1179 | out->value = buffer_get_string(&m, &len); |
1180 | out->length = len; | |
7364bd04 | 1181 | if (flags) |
1182 | *flags = buffer_get_int(&m); | |
1183 | ||
1184 | buffer_free(&m); | |
1185 | ||
1186 | return (major); | |
1187 | } | |
1188 | ||
0789992b | 1189 | OM_uint32 |
1190 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1191 | { | |
1192 | Buffer m; | |
1193 | OM_uint32 major; | |
1194 | ||
1195 | buffer_init(&m); | |
1196 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1197 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1198 | ||
1199 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1200 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1201 | &m); | |
1202 | ||
1203 | major = buffer_get_int(&m); | |
1204 | buffer_free(&m); | |
1205 | return(major); | |
1206 | } | |
1207 | ||
7364bd04 | 1208 | int |
1209 | mm_ssh_gssapi_userok(char *user) | |
1210 | { | |
1211 | Buffer m; | |
1212 | int authenticated = 0; | |
1213 | ||
1214 | buffer_init(&m); | |
1215 | ||
1216 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1217 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1218 | &m); | |
1219 | ||
1220 | authenticated = buffer_get_int(&m); | |
1221 | ||
1222 | buffer_free(&m); | |
1223 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1224 | return (authenticated); | |
1225 | } | |
1226 | #endif /* GSSAPI */ |