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00146caa | 1 | /* $OpenBSD: monitor_wrap.c,v 1.48 2006/07/22 20:48:23 stevesk Exp $ */ |
1853d1ef | 2 | /* |
3 | * Copyright 2002 Niels Provos <provos@citi.umich.edu> | |
4 | * Copyright 2002 Markus Friedl <markus@openbsd.org> | |
5 | * All rights reserved. | |
6 | * | |
7 | * Redistribution and use in source and binary forms, with or without | |
8 | * modification, are permitted provided that the following conditions | |
9 | * are met: | |
10 | * 1. Redistributions of source code must retain the above copyright | |
11 | * notice, this list of conditions and the following disclaimer. | |
12 | * 2. Redistributions in binary form must reproduce the above copyright | |
13 | * notice, this list of conditions and the following disclaimer in the | |
14 | * documentation and/or other materials provided with the distribution. | |
15 | * | |
16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
26 | */ | |
27 | ||
28 | #include "includes.h" | |
1853d1ef | 29 | |
b1842393 | 30 | #include <sys/types.h> |
31 | ||
1853d1ef | 32 | #include <openssl/bn.h> |
33 | #include <openssl/dh.h> | |
34 | ||
028094f4 | 35 | #include <errno.h> |
b1842393 | 36 | #include <pwd.h> |
00146caa | 37 | #include <string.h> |
b1842393 | 38 | |
1853d1ef | 39 | #include "ssh.h" |
40 | #include "dh.h" | |
41 | #include "kex.h" | |
42 | #include "auth.h" | |
92e15201 | 43 | #include "auth-options.h" |
1853d1ef | 44 | #include "buffer.h" |
45 | #include "bufaux.h" | |
46 | #include "packet.h" | |
47 | #include "mac.h" | |
48 | #include "log.h" | |
a655c012 | 49 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
50 | #undef TARGET_OS_MAC | |
9b08c23f | 51 | #include "zlib.h" |
a655c012 | 52 | #define TARGET_OS_MAC 1 |
53 | #else | |
54 | #include "zlib.h" | |
55 | #endif | |
1853d1ef | 56 | #include "monitor.h" |
57 | #include "monitor_wrap.h" | |
58 | #include "xmalloc.h" | |
59 | #include "atomicio.h" | |
60 | #include "monitor_fdpass.h" | |
51e7a012 | 61 | #include "misc.h" |
7fceb20d | 62 | #include "servconf.h" |
1853d1ef | 63 | |
64 | #include "auth.h" | |
65 | #include "channels.h" | |
66 | #include "session.h" | |
67 | ||
7364bd04 | 68 | #ifdef GSSAPI |
69 | #include "ssh-gss.h" | |
70 | #endif | |
71 | ||
1853d1ef | 72 | /* Imports */ |
73 | extern int compat20; | |
74 | extern Newkeys *newkeys[]; | |
75 | extern z_stream incoming_stream; | |
76 | extern z_stream outgoing_stream; | |
b5a28cbc | 77 | extern struct monitor *pmonitor; |
1853d1ef | 78 | extern Buffer input, output; |
be2ca0c9 | 79 | extern Buffer loginmsg; |
7fceb20d | 80 | extern ServerOptions options; |
1853d1ef | 81 | |
2362db19 | 82 | int |
83 | mm_is_monitor(void) | |
84 | { | |
85 | /* | |
86 | * m_pid is only set in the privileged part, and | |
87 | * points to the unprivileged child. | |
88 | */ | |
74677ba3 | 89 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 90 | } |
91 | ||
1853d1ef | 92 | void |
ca75d7de | 93 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 94 | { |
1853d1ef | 95 | u_int mlen = buffer_len(m); |
405a0d43 | 96 | u_char buf[5]; |
1853d1ef | 97 | |
1588c277 | 98 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 99 | |
51e7a012 | 100 | put_u32(buf, mlen + 1); |
7203d6bb | 101 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
ca75d7de | 102 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
05624c18 | 103 | fatal("%s: write: %s", __func__, strerror(errno)); |
ca75d7de | 104 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
05624c18 | 105 | fatal("%s: write: %s", __func__, strerror(errno)); |
1853d1ef | 106 | } |
107 | ||
108 | void | |
ca75d7de | 109 | mm_request_receive(int sock, Buffer *m) |
1853d1ef | 110 | { |
111 | u_char buf[4]; | |
1853d1ef | 112 | u_int msg_len; |
113 | ||
1588c277 | 114 | debug3("%s entering", __func__); |
1853d1ef | 115 | |
05624c18 | 116 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
117 | if (errno == EPIPE) | |
2362db19 | 118 | cleanup_exit(255); |
05624c18 | 119 | fatal("%s: read: %s", __func__, strerror(errno)); |
1853d1ef | 120 | } |
51e7a012 | 121 | msg_len = get_u32(buf); |
1853d1ef | 122 | if (msg_len > 256 * 1024) |
1588c277 | 123 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 124 | buffer_clear(m); |
125 | buffer_append_space(m, msg_len); | |
05624c18 | 126 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
127 | fatal("%s: read: %s", __func__, strerror(errno)); | |
1853d1ef | 128 | } |
129 | ||
130 | void | |
ca75d7de | 131 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 132 | { |
133 | u_char rtype; | |
134 | ||
1588c277 | 135 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 136 | |
ca75d7de | 137 | mm_request_receive(sock, m); |
1853d1ef | 138 | rtype = buffer_get_char(m); |
139 | if (rtype != type) | |
1588c277 | 140 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 141 | rtype, type); |
142 | } | |
143 | ||
144 | DH * | |
145 | mm_choose_dh(int min, int nbits, int max) | |
146 | { | |
147 | BIGNUM *p, *g; | |
148 | int success = 0; | |
149 | Buffer m; | |
150 | ||
151 | buffer_init(&m); | |
152 | buffer_put_int(&m, min); | |
153 | buffer_put_int(&m, nbits); | |
154 | buffer_put_int(&m, max); | |
155 | ||
b5a28cbc | 156 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 157 | |
1588c277 | 158 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 159 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 160 | |
161 | success = buffer_get_char(&m); | |
162 | if (success == 0) | |
1588c277 | 163 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 164 | |
165 | if ((p = BN_new()) == NULL) | |
1588c277 | 166 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 167 | if ((g = BN_new()) == NULL) |
1588c277 | 168 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 169 | buffer_get_bignum2(&m, p); |
170 | buffer_get_bignum2(&m, g); | |
171 | ||
1588c277 | 172 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 173 | buffer_free(&m); |
174 | ||
175 | return (dh_new_group(g, p)); | |
176 | } | |
177 | ||
178 | int | |
179 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
180 | { | |
b5a28cbc | 181 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 182 | Buffer m; |
183 | ||
1588c277 | 184 | debug3("%s entering", __func__); |
1853d1ef | 185 | |
186 | buffer_init(&m); | |
187 | buffer_put_int(&m, kex->host_key_index(key)); | |
188 | buffer_put_string(&m, data, datalen); | |
189 | ||
b5a28cbc | 190 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 191 | |
1588c277 | 192 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 193 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 194 | *sigp = buffer_get_string(&m, lenp); |
195 | buffer_free(&m); | |
196 | ||
197 | return (0); | |
198 | } | |
199 | ||
200 | struct passwd * | |
18a8f313 | 201 | mm_getpwnamallow(const char *username) |
1853d1ef | 202 | { |
203 | Buffer m; | |
204 | struct passwd *pw; | |
205 | u_int pwlen; | |
206 | ||
1588c277 | 207 | debug3("%s entering", __func__); |
1853d1ef | 208 | |
209 | buffer_init(&m); | |
18a8f313 | 210 | buffer_put_cstring(&m, username); |
1853d1ef | 211 | |
b5a28cbc | 212 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 213 | |
1588c277 | 214 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 215 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 216 | |
217 | if (buffer_get_char(&m) == 0) { | |
218 | buffer_free(&m); | |
219 | return (NULL); | |
220 | } | |
221 | pw = buffer_get_string(&m, &pwlen); | |
222 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 223 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 224 | pw->pw_name = buffer_get_string(&m, NULL); |
225 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
226 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 227 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 228 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 229 | #endif |
1853d1ef | 230 | pw->pw_dir = buffer_get_string(&m, NULL); |
231 | pw->pw_shell = buffer_get_string(&m, NULL); | |
232 | buffer_free(&m); | |
233 | ||
234 | return (pw); | |
235 | } | |
236 | ||
02cd6c56 | 237 | char * |
238 | mm_auth2_read_banner(void) | |
94a73cdc | 239 | { |
240 | Buffer m; | |
241 | char *banner; | |
242 | ||
1588c277 | 243 | debug3("%s entering", __func__); |
94a73cdc | 244 | |
245 | buffer_init(&m); | |
b5a28cbc | 246 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 247 | buffer_clear(&m); |
248 | ||
02cd6c56 | 249 | mm_request_receive_expect(pmonitor->m_recvfd, |
250 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 251 | banner = buffer_get_string(&m, NULL); |
252 | buffer_free(&m); | |
7203d6bb | 253 | |
02cd6c56 | 254 | /* treat empty banner as missing banner */ |
255 | if (strlen(banner) == 0) { | |
256 | xfree(banner); | |
257 | banner = NULL; | |
258 | } | |
94a73cdc | 259 | return (banner); |
260 | } | |
261 | ||
1853d1ef | 262 | /* Inform the privileged process about service and style */ |
263 | ||
264 | void | |
265 | mm_inform_authserv(char *service, char *style) | |
266 | { | |
267 | Buffer m; | |
268 | ||
1588c277 | 269 | debug3("%s entering", __func__); |
1853d1ef | 270 | |
271 | buffer_init(&m); | |
272 | buffer_put_cstring(&m, service); | |
273 | buffer_put_cstring(&m, style ? style : ""); | |
274 | ||
b5a28cbc | 275 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 276 | |
277 | buffer_free(&m); | |
278 | } | |
279 | ||
280 | /* Do the password authentication */ | |
281 | int | |
282 | mm_auth_password(Authctxt *authctxt, char *password) | |
283 | { | |
284 | Buffer m; | |
285 | int authenticated = 0; | |
286 | ||
1588c277 | 287 | debug3("%s entering", __func__); |
1853d1ef | 288 | |
289 | buffer_init(&m); | |
290 | buffer_put_cstring(&m, password); | |
b5a28cbc | 291 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 292 | |
1588c277 | 293 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 294 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 295 | |
296 | authenticated = buffer_get_int(&m); | |
297 | ||
298 | buffer_free(&m); | |
299 | ||
300 | debug3("%s: user %sauthenticated", | |
1588c277 | 301 | __func__, authenticated ? "" : "not "); |
1853d1ef | 302 | return (authenticated); |
303 | } | |
304 | ||
305 | int | |
306 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
307 | { | |
308 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
309 | } | |
310 | ||
311 | int | |
312 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
313 | Key *key) | |
314 | { | |
315 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
316 | } | |
317 | ||
318 | int | |
319 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
320 | char *host, Key *key) | |
321 | { | |
322 | int ret; | |
323 | ||
324 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
325 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
326 | key->type = KEY_RSA1; | |
327 | return (ret); | |
328 | } | |
329 | ||
330 | static void | |
331 | mm_send_debug(Buffer *m) | |
332 | { | |
333 | char *msg; | |
334 | ||
335 | while (buffer_len(m)) { | |
336 | msg = buffer_get_string(m, NULL); | |
1588c277 | 337 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 338 | packet_send_debug("%s", msg); |
339 | xfree(msg); | |
340 | } | |
341 | } | |
342 | ||
343 | int | |
344 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
345 | { | |
346 | Buffer m; | |
347 | u_char *blob; | |
348 | u_int len; | |
92e15201 | 349 | int allowed = 0, have_forced = 0; |
1853d1ef | 350 | |
1588c277 | 351 | debug3("%s entering", __func__); |
1853d1ef | 352 | |
353 | /* Convert the key to a blob and the pass it over */ | |
354 | if (!key_to_blob(key, &blob, &len)) | |
355 | return (0); | |
356 | ||
357 | buffer_init(&m); | |
358 | buffer_put_int(&m, type); | |
359 | buffer_put_cstring(&m, user ? user : ""); | |
360 | buffer_put_cstring(&m, host ? host : ""); | |
361 | buffer_put_string(&m, blob, len); | |
362 | xfree(blob); | |
363 | ||
b5a28cbc | 364 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 365 | |
1588c277 | 366 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 367 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 368 | |
369 | allowed = buffer_get_int(&m); | |
370 | ||
92e15201 | 371 | /* fake forced command */ |
372 | auth_clear_options(); | |
373 | have_forced = buffer_get_int(&m); | |
374 | forced_command = have_forced ? xstrdup("true") : NULL; | |
375 | ||
1853d1ef | 376 | /* Send potential debug messages */ |
377 | mm_send_debug(&m); | |
378 | ||
379 | buffer_free(&m); | |
380 | ||
381 | return (allowed); | |
382 | } | |
383 | ||
384 | /* | |
385 | * This key verify needs to send the key type along, because the | |
386 | * privileged parent makes the decision if the key is allowed | |
387 | * for authentication. | |
388 | */ | |
389 | ||
390 | int | |
391 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
392 | { | |
393 | Buffer m; | |
394 | u_char *blob; | |
395 | u_int len; | |
396 | int verified = 0; | |
397 | ||
1588c277 | 398 | debug3("%s entering", __func__); |
1853d1ef | 399 | |
400 | /* Convert the key to a blob and the pass it over */ | |
401 | if (!key_to_blob(key, &blob, &len)) | |
402 | return (0); | |
403 | ||
404 | buffer_init(&m); | |
405 | buffer_put_string(&m, blob, len); | |
406 | buffer_put_string(&m, sig, siglen); | |
407 | buffer_put_string(&m, data, datalen); | |
408 | xfree(blob); | |
409 | ||
b5a28cbc | 410 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 411 | |
1588c277 | 412 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 413 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 414 | |
415 | verified = buffer_get_int(&m); | |
416 | ||
417 | buffer_free(&m); | |
418 | ||
419 | return (verified); | |
420 | } | |
421 | ||
422 | /* Export key state after authentication */ | |
423 | Newkeys * | |
424 | mm_newkeys_from_blob(u_char *blob, int blen) | |
425 | { | |
426 | Buffer b; | |
427 | u_int len; | |
428 | Newkeys *newkey = NULL; | |
429 | Enc *enc; | |
430 | Mac *mac; | |
431 | Comp *comp; | |
432 | ||
1588c277 | 433 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 434 | #ifdef DEBUG_PK |
435 | dump_base64(stderr, blob, blen); | |
436 | #endif | |
437 | buffer_init(&b); | |
438 | buffer_append(&b, blob, blen); | |
439 | ||
440 | newkey = xmalloc(sizeof(*newkey)); | |
441 | enc = &newkey->enc; | |
442 | mac = &newkey->mac; | |
443 | comp = &newkey->comp; | |
444 | ||
445 | /* Enc structure */ | |
446 | enc->name = buffer_get_string(&b, NULL); | |
447 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
448 | enc->enabled = buffer_get_int(&b); | |
449 | enc->block_size = buffer_get_int(&b); | |
450 | enc->key = buffer_get_string(&b, &enc->key_len); | |
451 | enc->iv = buffer_get_string(&b, &len); | |
452 | if (len != enc->block_size) | |
bb0640b2 | 453 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 454 | enc->block_size, len); |
455 | ||
456 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 457 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 458 | enc->name, enc->cipher); |
459 | ||
460 | /* Mac structure */ | |
461 | mac->name = buffer_get_string(&b, NULL); | |
462 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 463 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 464 | mac->enabled = buffer_get_int(&b); |
465 | mac->key = buffer_get_string(&b, &len); | |
466 | if (len > mac->key_len) | |
bb0640b2 | 467 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 468 | mac->key_len); |
469 | mac->key_len = len; | |
470 | ||
471 | /* Comp structure */ | |
472 | comp->type = buffer_get_int(&b); | |
473 | comp->enabled = buffer_get_int(&b); | |
474 | comp->name = buffer_get_string(&b, NULL); | |
475 | ||
476 | len = buffer_len(&b); | |
477 | if (len != 0) | |
bb0640b2 | 478 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 479 | buffer_free(&b); |
480 | return (newkey); | |
481 | } | |
482 | ||
483 | int | |
484 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
485 | { | |
486 | Buffer b; | |
487 | int len; | |
1853d1ef | 488 | Enc *enc; |
489 | Mac *mac; | |
490 | Comp *comp; | |
491 | Newkeys *newkey = newkeys[mode]; | |
492 | ||
1588c277 | 493 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 494 | |
495 | if (newkey == NULL) { | |
1588c277 | 496 | error("%s: newkey == NULL", __func__); |
1853d1ef | 497 | return 0; |
498 | } | |
499 | enc = &newkey->enc; | |
500 | mac = &newkey->mac; | |
501 | comp = &newkey->comp; | |
502 | ||
503 | buffer_init(&b); | |
504 | /* Enc structure */ | |
505 | buffer_put_cstring(&b, enc->name); | |
506 | /* The cipher struct is constant and shared, you export pointer */ | |
507 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
508 | buffer_put_int(&b, enc->enabled); | |
509 | buffer_put_int(&b, enc->block_size); | |
510 | buffer_put_string(&b, enc->key, enc->key_len); | |
511 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
512 | buffer_put_string(&b, enc->iv, enc->block_size); | |
513 | ||
514 | /* Mac structure */ | |
515 | buffer_put_cstring(&b, mac->name); | |
516 | buffer_put_int(&b, mac->enabled); | |
517 | buffer_put_string(&b, mac->key, mac->key_len); | |
518 | ||
519 | /* Comp structure */ | |
520 | buffer_put_int(&b, comp->type); | |
521 | buffer_put_int(&b, comp->enabled); | |
522 | buffer_put_cstring(&b, comp->name); | |
523 | ||
524 | len = buffer_len(&b); | |
1853d1ef | 525 | if (lenp != NULL) |
526 | *lenp = len; | |
eb9f2fab | 527 | if (blobp != NULL) { |
528 | *blobp = xmalloc(len); | |
529 | memcpy(*blobp, buffer_ptr(&b), len); | |
530 | } | |
531 | memset(buffer_ptr(&b), 0, len); | |
532 | buffer_free(&b); | |
1853d1ef | 533 | return len; |
534 | } | |
535 | ||
536 | static void | |
537 | mm_send_kex(Buffer *m, Kex *kex) | |
538 | { | |
539 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
540 | buffer_put_int(m, kex->we_need); | |
541 | buffer_put_int(m, kex->hostkey_type); | |
542 | buffer_put_int(m, kex->kex_type); | |
543 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
544 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
545 | buffer_put_int(m, kex->flags); | |
546 | buffer_put_cstring(m, kex->client_version_string); | |
547 | buffer_put_cstring(m, kex->server_version_string); | |
548 | } | |
549 | ||
550 | void | |
ca75d7de | 551 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 552 | { |
553 | Buffer m; | |
554 | u_char *blob, *p; | |
555 | u_int bloblen, plen; | |
ffd7b36b | 556 | u_int32_t seqnr, packets; |
557 | u_int64_t blocks; | |
1853d1ef | 558 | |
559 | buffer_init(&m); | |
560 | ||
561 | if (!compat20) { | |
562 | u_char iv[24]; | |
9459414c | 563 | u_char *key; |
564 | u_int ivlen, keylen; | |
1853d1ef | 565 | |
566 | buffer_put_int(&m, packet_get_protocol_flags()); | |
567 | ||
568 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
569 | ||
9459414c | 570 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
571 | keylen = packet_get_encryption_key(NULL); | |
572 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
573 | keylen = packet_get_encryption_key(key); | |
574 | buffer_put_string(&m, key, keylen); | |
575 | memset(key, 0, keylen); | |
576 | xfree(key); | |
577 | ||
1853d1ef | 578 | ivlen = packet_get_keyiv_len(MODE_OUT); |
579 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
580 | buffer_put_string(&m, iv, ivlen); | |
581 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
582 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
583 | buffer_put_string(&m, iv, ivlen); | |
584 | goto skip; | |
585 | } else { | |
586 | /* Kex for rekeying */ | |
ca75d7de | 587 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 588 | } |
589 | ||
590 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 591 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 592 | |
593 | /* Keys from Kex */ | |
594 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 595 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 596 | |
597 | buffer_put_string(&m, blob, bloblen); | |
598 | xfree(blob); | |
599 | ||
600 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 601 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 602 | |
603 | buffer_put_string(&m, blob, bloblen); | |
604 | xfree(blob); | |
605 | ||
ffd7b36b | 606 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
607 | buffer_put_int(&m, seqnr); | |
608 | buffer_put_int64(&m, blocks); | |
609 | buffer_put_int(&m, packets); | |
806e4c11 | 610 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 611 | buffer_put_int(&m, seqnr); |
612 | buffer_put_int64(&m, blocks); | |
613 | buffer_put_int(&m, packets); | |
1853d1ef | 614 | |
1588c277 | 615 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 616 | skip: |
617 | /* More key context */ | |
618 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
619 | p = xmalloc(plen+1); | |
620 | packet_get_keycontext(MODE_OUT, p); | |
621 | buffer_put_string(&m, p, plen); | |
622 | xfree(p); | |
623 | ||
624 | plen = packet_get_keycontext(MODE_IN, NULL); | |
625 | p = xmalloc(plen+1); | |
626 | packet_get_keycontext(MODE_IN, p); | |
627 | buffer_put_string(&m, p, plen); | |
628 | xfree(p); | |
629 | ||
630 | /* Compression state */ | |
1588c277 | 631 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 632 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
633 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
634 | ||
635 | /* Network I/O buffers */ | |
636 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
637 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
638 | ||
ca75d7de | 639 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 640 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 641 | |
642 | buffer_free(&m); | |
643 | } | |
644 | ||
645 | int | |
148de80c | 646 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
1853d1ef | 647 | { |
648 | Buffer m; | |
be2ca0c9 | 649 | char *p, *msg; |
1853d1ef | 650 | int success = 0; |
651 | ||
652 | buffer_init(&m); | |
b5a28cbc | 653 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 654 | |
1588c277 | 655 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 656 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 657 | |
658 | success = buffer_get_int(&m); | |
659 | if (success == 0) { | |
1588c277 | 660 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 661 | buffer_free(&m); |
662 | return (0); | |
663 | } | |
664 | p = buffer_get_string(&m, NULL); | |
be2ca0c9 | 665 | msg = buffer_get_string(&m, NULL); |
1853d1ef | 666 | buffer_free(&m); |
667 | ||
668 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
669 | xfree(p); | |
670 | ||
be2ca0c9 | 671 | buffer_append(&loginmsg, msg, strlen(msg)); |
672 | xfree(msg); | |
673 | ||
b5a28cbc | 674 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
675 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 676 | |
677 | /* Success */ | |
678 | return (1); | |
679 | } | |
680 | ||
681 | void | |
2362db19 | 682 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 683 | { |
1853d1ef | 684 | Buffer m; |
685 | ||
686 | if (s->ttyfd == -1) | |
687 | return; | |
688 | buffer_init(&m); | |
689 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 690 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 691 | buffer_free(&m); |
692 | ||
693 | /* closed dup'ed master */ | |
694 | if (close(s->ptymaster) < 0) | |
695 | error("close(s->ptymaster): %s", strerror(errno)); | |
696 | ||
697 | /* unlink pty from session */ | |
698 | s->ttyfd = -1; | |
699 | } | |
700 | ||
ad200abb | 701 | #ifdef USE_PAM |
702 | void | |
529d73ab | 703 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 704 | { |
705 | Buffer m; | |
706 | ||
1588c277 | 707 | debug3("%s entering", __func__); |
7fceb20d | 708 | if (!options.use_pam) |
709 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 710 | |
711 | buffer_init(&m); | |
b5a28cbc | 712 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 713 | |
714 | buffer_free(&m); | |
715 | } | |
05114c74 | 716 | |
5b9e2464 | 717 | u_int |
718 | mm_do_pam_account(void) | |
719 | { | |
720 | Buffer m; | |
721 | u_int ret; | |
ba6dd90e | 722 | char *msg; |
5b9e2464 | 723 | |
724 | debug3("%s entering", __func__); | |
725 | if (!options.use_pam) | |
726 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
727 | ||
728 | buffer_init(&m); | |
729 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
730 | ||
aff51935 | 731 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 732 | MONITOR_ANS_PAM_ACCOUNT, &m); |
733 | ret = buffer_get_int(&m); | |
ba6dd90e | 734 | msg = buffer_get_string(&m, NULL); |
735 | buffer_append(&loginmsg, msg, strlen(msg)); | |
736 | xfree(msg); | |
5b9e2464 | 737 | |
738 | buffer_free(&m); | |
b6453d99 | 739 | |
5b9e2464 | 740 | debug3("%s returning %d", __func__, ret); |
741 | ||
742 | return (ret); | |
743 | } | |
744 | ||
05114c74 | 745 | void * |
746 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
747 | { | |
748 | Buffer m; | |
749 | int success; | |
750 | ||
751 | debug3("%s", __func__); | |
752 | buffer_init(&m); | |
753 | buffer_put_cstring(&m, authctxt->user); | |
754 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
755 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
756 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
757 | success = buffer_get_int(&m); | |
758 | if (success == 0) { | |
759 | debug3("%s: pam_init_ctx failed", __func__); | |
760 | buffer_free(&m); | |
761 | return (NULL); | |
762 | } | |
763 | buffer_free(&m); | |
764 | return (authctxt); | |
765 | } | |
766 | ||
767 | int | |
768 | mm_sshpam_query(void *ctx, char **name, char **info, | |
769 | u_int *num, char ***prompts, u_int **echo_on) | |
770 | { | |
771 | Buffer m; | |
a1a073cc | 772 | u_int i; |
773 | int ret; | |
05114c74 | 774 | |
775 | debug3("%s", __func__); | |
776 | buffer_init(&m); | |
777 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
778 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
779 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
780 | ret = buffer_get_int(&m); | |
781 | debug3("%s: pam_query returned %d", __func__, ret); | |
782 | *name = buffer_get_string(&m, NULL); | |
783 | *info = buffer_get_string(&m, NULL); | |
784 | *num = buffer_get_int(&m); | |
01d35895 | 785 | if (*num > PAM_MAX_NUM_MSG) |
786 | fatal("%s: recieved %u PAM messages, expected <= %u", | |
787 | __func__, *num, PAM_MAX_NUM_MSG); | |
788 | *prompts = xcalloc((*num + 1), sizeof(char *)); | |
789 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); | |
05114c74 | 790 | for (i = 0; i < *num; ++i) { |
791 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
792 | (*echo_on)[i] = buffer_get_int(&m); | |
793 | } | |
794 | buffer_free(&m); | |
795 | return (ret); | |
796 | } | |
797 | ||
798 | int | |
799 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
800 | { | |
801 | Buffer m; | |
a1a073cc | 802 | u_int i; |
803 | int ret; | |
05114c74 | 804 | |
805 | debug3("%s", __func__); | |
806 | buffer_init(&m); | |
807 | buffer_put_int(&m, num); | |
808 | for (i = 0; i < num; ++i) | |
809 | buffer_put_cstring(&m, resp[i]); | |
810 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
811 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
812 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
813 | ret = buffer_get_int(&m); | |
814 | debug3("%s: pam_respond returned %d", __func__, ret); | |
815 | buffer_free(&m); | |
816 | return (ret); | |
817 | } | |
818 | ||
819 | void | |
820 | mm_sshpam_free_ctx(void *ctxtp) | |
821 | { | |
822 | Buffer m; | |
823 | ||
824 | debug3("%s", __func__); | |
825 | buffer_init(&m); | |
826 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
827 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
828 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
829 | buffer_free(&m); | |
830 | } | |
ad200abb | 831 | #endif /* USE_PAM */ |
832 | ||
1853d1ef | 833 | /* Request process termination */ |
834 | ||
835 | void | |
836 | mm_terminate(void) | |
837 | { | |
838 | Buffer m; | |
839 | ||
840 | buffer_init(&m); | |
b5a28cbc | 841 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 842 | buffer_free(&m); |
843 | } | |
844 | ||
845 | int | |
846 | mm_ssh1_session_key(BIGNUM *num) | |
847 | { | |
848 | int rsafail; | |
849 | Buffer m; | |
850 | ||
851 | buffer_init(&m); | |
852 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 853 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 854 | |
b5a28cbc | 855 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 856 | |
857 | rsafail = buffer_get_int(&m); | |
858 | buffer_get_bignum2(&m, num); | |
859 | ||
860 | buffer_free(&m); | |
861 | ||
862 | return (rsafail); | |
863 | } | |
864 | ||
865 | static void | |
866 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
867 | char ***prompts, u_int **echo_on) | |
868 | { | |
7203d6bb | 869 | *name = xstrdup(""); |
870 | *infotxt = xstrdup(""); | |
1853d1ef | 871 | *numprompts = 1; |
52e3daed | 872 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
873 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
1853d1ef | 874 | (*echo_on)[0] = 0; |
875 | } | |
876 | ||
877 | int | |
878 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
879 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
880 | { | |
881 | Buffer m; | |
6d6c25e3 | 882 | u_int success; |
1853d1ef | 883 | char *challenge; |
884 | ||
1588c277 | 885 | debug3("%s: entering", __func__); |
1853d1ef | 886 | |
887 | buffer_init(&m); | |
b5a28cbc | 888 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 889 | |
b5a28cbc | 890 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 891 | &m); |
6d6c25e3 | 892 | success = buffer_get_int(&m); |
893 | if (success == 0) { | |
1588c277 | 894 | debug3("%s: no challenge", __func__); |
1853d1ef | 895 | buffer_free(&m); |
896 | return (-1); | |
897 | } | |
898 | ||
899 | /* Get the challenge, and format the response */ | |
900 | challenge = buffer_get_string(&m, NULL); | |
901 | buffer_free(&m); | |
902 | ||
903 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
904 | (*prompts)[0] = challenge; | |
905 | ||
1588c277 | 906 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 907 | |
908 | return (0); | |
909 | } | |
910 | ||
911 | int | |
912 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
913 | { | |
914 | Buffer m; | |
915 | int authok; | |
916 | ||
1588c277 | 917 | debug3("%s: entering", __func__); |
1853d1ef | 918 | if (numresponses != 1) |
919 | return (-1); | |
920 | ||
921 | buffer_init(&m); | |
922 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 923 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 924 | |
b5a28cbc | 925 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 926 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
927 | ||
928 | authok = buffer_get_int(&m); | |
929 | buffer_free(&m); | |
930 | ||
931 | return ((authok == 0) ? -1 : 0); | |
932 | } | |
933 | ||
77751377 | 934 | #ifdef SKEY |
1853d1ef | 935 | int |
936 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
937 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
938 | { | |
939 | Buffer m; | |
6d6c25e3 | 940 | int len; |
941 | u_int success; | |
1853d1ef | 942 | char *p, *challenge; |
943 | ||
1588c277 | 944 | debug3("%s: entering", __func__); |
1853d1ef | 945 | |
946 | buffer_init(&m); | |
b5a28cbc | 947 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 948 | |
b5a28cbc | 949 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 950 | &m); |
6d6c25e3 | 951 | success = buffer_get_int(&m); |
952 | if (success == 0) { | |
1588c277 | 953 | debug3("%s: no challenge", __func__); |
1853d1ef | 954 | buffer_free(&m); |
955 | return (-1); | |
956 | } | |
957 | ||
958 | /* Get the challenge, and format the response */ | |
959 | challenge = buffer_get_string(&m, NULL); | |
960 | buffer_free(&m); | |
961 | ||
1588c277 | 962 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 963 | |
964 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
965 | ||
52e3daed | 966 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
1853d1ef | 967 | xfree(challenge); |
968 | ||
969 | return (0); | |
970 | } | |
971 | ||
972 | int | |
973 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
974 | { | |
975 | Buffer m; | |
976 | int authok; | |
977 | ||
1588c277 | 978 | debug3("%s: entering", __func__); |
1853d1ef | 979 | if (numresponses != 1) |
980 | return (-1); | |
981 | ||
982 | buffer_init(&m); | |
983 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 984 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 985 | |
b5a28cbc | 986 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 987 | MONITOR_ANS_SKEYRESPOND, &m); |
988 | ||
989 | authok = buffer_get_int(&m); | |
990 | buffer_free(&m); | |
991 | ||
992 | return ((authok == 0) ? -1 : 0); | |
993 | } | |
77751377 | 994 | #endif /* SKEY */ |
1853d1ef | 995 | |
996 | void | |
997 | mm_ssh1_session_id(u_char session_id[16]) | |
998 | { | |
999 | Buffer m; | |
1000 | int i; | |
1001 | ||
1588c277 | 1002 | debug3("%s entering", __func__); |
1853d1ef | 1003 | |
1004 | buffer_init(&m); | |
1005 | for (i = 0; i < 16; i++) | |
1006 | buffer_put_char(&m, session_id[i]); | |
1007 | ||
b5a28cbc | 1008 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 1009 | buffer_free(&m); |
1010 | } | |
1011 | ||
1012 | int | |
1013 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1014 | { | |
1015 | Buffer m; | |
1016 | Key *key; | |
1017 | u_char *blob; | |
1018 | u_int blen; | |
92e15201 | 1019 | int allowed = 0, have_forced = 0; |
1853d1ef | 1020 | |
1588c277 | 1021 | debug3("%s entering", __func__); |
1853d1ef | 1022 | |
1023 | buffer_init(&m); | |
1024 | buffer_put_bignum2(&m, client_n); | |
1025 | ||
b5a28cbc | 1026 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1027 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1028 | |
1029 | allowed = buffer_get_int(&m); | |
1030 | ||
92e15201 | 1031 | /* fake forced command */ |
1032 | auth_clear_options(); | |
1033 | have_forced = buffer_get_int(&m); | |
1034 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1035 | ||
1853d1ef | 1036 | if (allowed && rkey != NULL) { |
1037 | blob = buffer_get_string(&m, &blen); | |
1038 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1039 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1040 | *rkey = key; |
1041 | xfree(blob); | |
1042 | } | |
1043 | mm_send_debug(&m); | |
1044 | buffer_free(&m); | |
1045 | ||
1046 | return (allowed); | |
1047 | } | |
1048 | ||
1049 | BIGNUM * | |
1050 | mm_auth_rsa_generate_challenge(Key *key) | |
1051 | { | |
1052 | Buffer m; | |
1053 | BIGNUM *challenge; | |
1054 | u_char *blob; | |
1055 | u_int blen; | |
1056 | ||
1588c277 | 1057 | debug3("%s entering", __func__); |
1853d1ef | 1058 | |
1059 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1060 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1061 | |
1062 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1063 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1064 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1065 | key->type = KEY_RSA1; |
1066 | ||
1067 | buffer_init(&m); | |
1068 | buffer_put_string(&m, blob, blen); | |
1069 | xfree(blob); | |
1070 | ||
b5a28cbc | 1071 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1072 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1073 | |
1074 | buffer_get_bignum2(&m, challenge); | |
1075 | buffer_free(&m); | |
1076 | ||
1077 | return (challenge); | |
1078 | } | |
1079 | ||
1080 | int | |
1081 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1082 | { | |
1083 | Buffer m; | |
1084 | u_char *blob; | |
1085 | u_int blen; | |
1086 | int success = 0; | |
1087 | ||
1588c277 | 1088 | debug3("%s entering", __func__); |
1853d1ef | 1089 | |
1090 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1091 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1092 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1093 | key->type = KEY_RSA1; |
1094 | ||
1095 | buffer_init(&m); | |
1096 | buffer_put_string(&m, blob, blen); | |
1097 | buffer_put_string(&m, response, 16); | |
1098 | xfree(blob); | |
1099 | ||
b5a28cbc | 1100 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1101 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1102 | |
1103 | success = buffer_get_int(&m); | |
1104 | buffer_free(&m); | |
1105 | ||
1106 | return (success); | |
1107 | } | |
696f6bef | 1108 | |
6039eeef | 1109 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 1110 | void |
1111 | mm_audit_event(ssh_audit_event_t event) | |
1112 | { | |
1113 | Buffer m; | |
1114 | ||
1115 | debug3("%s entering", __func__); | |
1116 | ||
1117 | buffer_init(&m); | |
1118 | buffer_put_int(&m, event); | |
1119 | ||
1120 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1121 | buffer_free(&m); | |
1122 | } | |
1123 | ||
1124 | void | |
1125 | mm_audit_run_command(const char *command) | |
1126 | { | |
1127 | Buffer m; | |
1128 | ||
1129 | debug3("%s entering command %s", __func__, command); | |
1130 | ||
1131 | buffer_init(&m); | |
1132 | buffer_put_cstring(&m, command); | |
1133 | ||
1134 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1135 | buffer_free(&m); | |
1136 | } | |
6039eeef | 1137 | #endif /* SSH_AUDIT_EVENTS */ |
c00e4d75 | 1138 | |
7364bd04 | 1139 | #ifdef GSSAPI |
1140 | OM_uint32 | |
ca75d7de | 1141 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1142 | { |
1143 | Buffer m; | |
1144 | OM_uint32 major; | |
1145 | ||
1146 | /* Client doesn't get to see the context */ | |
1147 | *ctx = NULL; | |
1148 | ||
1149 | buffer_init(&m); | |
ca75d7de | 1150 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1151 | |
1152 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1153 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1154 | ||
1155 | major = buffer_get_int(&m); | |
1156 | ||
1157 | buffer_free(&m); | |
1158 | return (major); | |
1159 | } | |
1160 | ||
1161 | OM_uint32 | |
1162 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1163 | gss_buffer_desc *out, OM_uint32 *flags) | |
1164 | { | |
1165 | Buffer m; | |
1166 | OM_uint32 major; | |
f99e1ca4 | 1167 | u_int len; |
7364bd04 | 1168 | |
1169 | buffer_init(&m); | |
1170 | buffer_put_string(&m, in->value, in->length); | |
1171 | ||
1172 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1173 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1174 | ||
1175 | major = buffer_get_int(&m); | |
f99e1ca4 | 1176 | out->value = buffer_get_string(&m, &len); |
1177 | out->length = len; | |
7364bd04 | 1178 | if (flags) |
1179 | *flags = buffer_get_int(&m); | |
1180 | ||
1181 | buffer_free(&m); | |
1182 | ||
1183 | return (major); | |
1184 | } | |
1185 | ||
0789992b | 1186 | OM_uint32 |
1187 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1188 | { | |
1189 | Buffer m; | |
1190 | OM_uint32 major; | |
1191 | ||
1192 | buffer_init(&m); | |
1193 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1194 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1195 | ||
1196 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1197 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1198 | &m); | |
1199 | ||
1200 | major = buffer_get_int(&m); | |
1201 | buffer_free(&m); | |
1202 | return(major); | |
1203 | } | |
1204 | ||
7364bd04 | 1205 | int |
1206 | mm_ssh_gssapi_userok(char *user) | |
1207 | { | |
1208 | Buffer m; | |
1209 | int authenticated = 0; | |
1210 | ||
1211 | buffer_init(&m); | |
1212 | ||
1213 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1214 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1215 | &m); | |
1216 | ||
1217 | authenticated = buffer_get_int(&m); | |
1218 | ||
1219 | buffer_free(&m); | |
1220 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1221 | return (authenticated); | |
1222 | } | |
1223 | #endif /* GSSAPI */ |