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31652869 | 1 | /* $OpenBSD: monitor_wrap.c,v 1.50 2006/08/03 03:34:42 deraadt 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 | ||
028094f4 | 32 | #include <errno.h> |
b1842393 | 33 | #include <pwd.h> |
31652869 | 34 | #include <signal.h> |
cf851879 | 35 | #include <stdio.h> |
00146caa | 36 | #include <string.h> |
b1842393 | 37 | |
31652869 | 38 | #include <openssl/bn.h> |
39 | #include <openssl/dh.h> | |
40 | ||
41 | #include "xmalloc.h" | |
1853d1ef | 42 | #include "ssh.h" |
43 | #include "dh.h" | |
31652869 | 44 | #include "buffer.h" |
45 | #include "key.h" | |
46 | #include "cipher.h" | |
1853d1ef | 47 | #include "kex.h" |
31652869 | 48 | #include "hostfile.h" |
1853d1ef | 49 | #include "auth.h" |
92e15201 | 50 | #include "auth-options.h" |
1853d1ef | 51 | #include "packet.h" |
52 | #include "mac.h" | |
53 | #include "log.h" | |
a655c012 | 54 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
55 | #undef TARGET_OS_MAC | |
9b08c23f | 56 | #include "zlib.h" |
a655c012 | 57 | #define TARGET_OS_MAC 1 |
58 | #else | |
59 | #include "zlib.h" | |
60 | #endif | |
1853d1ef | 61 | #include "monitor.h" |
31652869 | 62 | #ifdef GSSAPI |
63 | #include "ssh-gss.h" | |
64 | #endif | |
1853d1ef | 65 | #include "monitor_wrap.h" |
1853d1ef | 66 | #include "atomicio.h" |
67 | #include "monitor_fdpass.h" | |
51e7a012 | 68 | #include "misc.h" |
7fceb20d | 69 | #include "servconf.h" |
1853d1ef | 70 | |
1853d1ef | 71 | #include "channels.h" |
72 | #include "session.h" | |
73 | ||
74 | /* Imports */ | |
75 | extern int compat20; | |
76 | extern Newkeys *newkeys[]; | |
77 | extern z_stream incoming_stream; | |
78 | extern z_stream outgoing_stream; | |
b5a28cbc | 79 | extern struct monitor *pmonitor; |
1853d1ef | 80 | extern Buffer input, output; |
be2ca0c9 | 81 | extern Buffer loginmsg; |
7fceb20d | 82 | extern ServerOptions options; |
1853d1ef | 83 | |
2362db19 | 84 | int |
85 | mm_is_monitor(void) | |
86 | { | |
87 | /* | |
88 | * m_pid is only set in the privileged part, and | |
89 | * points to the unprivileged child. | |
90 | */ | |
74677ba3 | 91 | return (pmonitor && pmonitor->m_pid > 0); |
2362db19 | 92 | } |
93 | ||
1853d1ef | 94 | void |
ca75d7de | 95 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 96 | { |
1853d1ef | 97 | u_int mlen = buffer_len(m); |
405a0d43 | 98 | u_char buf[5]; |
1853d1ef | 99 | |
1588c277 | 100 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 101 | |
51e7a012 | 102 | put_u32(buf, mlen + 1); |
7203d6bb | 103 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
ca75d7de | 104 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
05624c18 | 105 | fatal("%s: write: %s", __func__, strerror(errno)); |
ca75d7de | 106 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
05624c18 | 107 | fatal("%s: write: %s", __func__, strerror(errno)); |
1853d1ef | 108 | } |
109 | ||
110 | void | |
ca75d7de | 111 | mm_request_receive(int sock, Buffer *m) |
1853d1ef | 112 | { |
113 | u_char buf[4]; | |
1853d1ef | 114 | u_int msg_len; |
115 | ||
1588c277 | 116 | debug3("%s entering", __func__); |
1853d1ef | 117 | |
05624c18 | 118 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
119 | if (errno == EPIPE) | |
2362db19 | 120 | cleanup_exit(255); |
05624c18 | 121 | fatal("%s: read: %s", __func__, strerror(errno)); |
1853d1ef | 122 | } |
51e7a012 | 123 | msg_len = get_u32(buf); |
1853d1ef | 124 | if (msg_len > 256 * 1024) |
1588c277 | 125 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
1853d1ef | 126 | buffer_clear(m); |
127 | buffer_append_space(m, msg_len); | |
05624c18 | 128 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
129 | fatal("%s: read: %s", __func__, strerror(errno)); | |
1853d1ef | 130 | } |
131 | ||
132 | void | |
ca75d7de | 133 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
1853d1ef | 134 | { |
135 | u_char rtype; | |
136 | ||
1588c277 | 137 | debug3("%s entering: type %d", __func__, type); |
1853d1ef | 138 | |
ca75d7de | 139 | mm_request_receive(sock, m); |
1853d1ef | 140 | rtype = buffer_get_char(m); |
141 | if (rtype != type) | |
1588c277 | 142 | fatal("%s: read: rtype %d != type %d", __func__, |
1853d1ef | 143 | rtype, type); |
144 | } | |
145 | ||
146 | DH * | |
147 | mm_choose_dh(int min, int nbits, int max) | |
148 | { | |
149 | BIGNUM *p, *g; | |
150 | int success = 0; | |
151 | Buffer m; | |
152 | ||
153 | buffer_init(&m); | |
154 | buffer_put_int(&m, min); | |
155 | buffer_put_int(&m, nbits); | |
156 | buffer_put_int(&m, max); | |
157 | ||
b5a28cbc | 158 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); |
1853d1ef | 159 | |
1588c277 | 160 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
b5a28cbc | 161 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
1853d1ef | 162 | |
163 | success = buffer_get_char(&m); | |
164 | if (success == 0) | |
1588c277 | 165 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
1853d1ef | 166 | |
167 | if ((p = BN_new()) == NULL) | |
1588c277 | 168 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 169 | if ((g = BN_new()) == NULL) |
1588c277 | 170 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 171 | buffer_get_bignum2(&m, p); |
172 | buffer_get_bignum2(&m, g); | |
173 | ||
1588c277 | 174 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
1853d1ef | 175 | buffer_free(&m); |
176 | ||
177 | return (dh_new_group(g, p)); | |
178 | } | |
179 | ||
180 | int | |
181 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
182 | { | |
b5a28cbc | 183 | Kex *kex = *pmonitor->m_pkex; |
1853d1ef | 184 | Buffer m; |
185 | ||
1588c277 | 186 | debug3("%s entering", __func__); |
1853d1ef | 187 | |
188 | buffer_init(&m); | |
189 | buffer_put_int(&m, kex->host_key_index(key)); | |
190 | buffer_put_string(&m, data, datalen); | |
191 | ||
b5a28cbc | 192 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); |
1853d1ef | 193 | |
1588c277 | 194 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
b5a28cbc | 195 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
1853d1ef | 196 | *sigp = buffer_get_string(&m, lenp); |
197 | buffer_free(&m); | |
198 | ||
199 | return (0); | |
200 | } | |
201 | ||
202 | struct passwd * | |
18a8f313 | 203 | mm_getpwnamallow(const char *username) |
1853d1ef | 204 | { |
205 | Buffer m; | |
206 | struct passwd *pw; | |
207 | u_int pwlen; | |
208 | ||
1588c277 | 209 | debug3("%s entering", __func__); |
1853d1ef | 210 | |
211 | buffer_init(&m); | |
18a8f313 | 212 | buffer_put_cstring(&m, username); |
1853d1ef | 213 | |
b5a28cbc | 214 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); |
1853d1ef | 215 | |
1588c277 | 216 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
b5a28cbc | 217 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
1853d1ef | 218 | |
219 | if (buffer_get_char(&m) == 0) { | |
220 | buffer_free(&m); | |
221 | return (NULL); | |
222 | } | |
223 | pw = buffer_get_string(&m, &pwlen); | |
224 | if (pwlen != sizeof(struct passwd)) | |
1588c277 | 225 | fatal("%s: struct passwd size mismatch", __func__); |
1853d1ef | 226 | pw->pw_name = buffer_get_string(&m, NULL); |
227 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
228 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
7b18c353 | 229 | #ifdef HAVE_PW_CLASS_IN_PASSWD |
1853d1ef | 230 | pw->pw_class = buffer_get_string(&m, NULL); |
7b18c353 | 231 | #endif |
1853d1ef | 232 | pw->pw_dir = buffer_get_string(&m, NULL); |
233 | pw->pw_shell = buffer_get_string(&m, NULL); | |
234 | buffer_free(&m); | |
235 | ||
236 | return (pw); | |
237 | } | |
238 | ||
02cd6c56 | 239 | char * |
240 | mm_auth2_read_banner(void) | |
94a73cdc | 241 | { |
242 | Buffer m; | |
243 | char *banner; | |
244 | ||
1588c277 | 245 | debug3("%s entering", __func__); |
94a73cdc | 246 | |
247 | buffer_init(&m); | |
b5a28cbc | 248 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); |
94a73cdc | 249 | buffer_clear(&m); |
250 | ||
02cd6c56 | 251 | mm_request_receive_expect(pmonitor->m_recvfd, |
252 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
94a73cdc | 253 | banner = buffer_get_string(&m, NULL); |
254 | buffer_free(&m); | |
7203d6bb | 255 | |
02cd6c56 | 256 | /* treat empty banner as missing banner */ |
257 | if (strlen(banner) == 0) { | |
258 | xfree(banner); | |
259 | banner = NULL; | |
260 | } | |
94a73cdc | 261 | return (banner); |
262 | } | |
263 | ||
1853d1ef | 264 | /* Inform the privileged process about service and style */ |
265 | ||
266 | void | |
267 | mm_inform_authserv(char *service, char *style) | |
268 | { | |
269 | Buffer m; | |
270 | ||
1588c277 | 271 | debug3("%s entering", __func__); |
1853d1ef | 272 | |
273 | buffer_init(&m); | |
274 | buffer_put_cstring(&m, service); | |
275 | buffer_put_cstring(&m, style ? style : ""); | |
276 | ||
b5a28cbc | 277 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); |
1853d1ef | 278 | |
279 | buffer_free(&m); | |
280 | } | |
281 | ||
282 | /* Do the password authentication */ | |
283 | int | |
284 | mm_auth_password(Authctxt *authctxt, char *password) | |
285 | { | |
286 | Buffer m; | |
287 | int authenticated = 0; | |
288 | ||
1588c277 | 289 | debug3("%s entering", __func__); |
1853d1ef | 290 | |
291 | buffer_init(&m); | |
292 | buffer_put_cstring(&m, password); | |
b5a28cbc | 293 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); |
1853d1ef | 294 | |
1588c277 | 295 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
b5a28cbc | 296 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
1853d1ef | 297 | |
298 | authenticated = buffer_get_int(&m); | |
299 | ||
300 | buffer_free(&m); | |
301 | ||
302 | debug3("%s: user %sauthenticated", | |
1588c277 | 303 | __func__, authenticated ? "" : "not "); |
1853d1ef | 304 | return (authenticated); |
305 | } | |
306 | ||
307 | int | |
308 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
309 | { | |
310 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
311 | } | |
312 | ||
313 | int | |
314 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
315 | Key *key) | |
316 | { | |
317 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
318 | } | |
319 | ||
320 | int | |
321 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
322 | char *host, Key *key) | |
323 | { | |
324 | int ret; | |
325 | ||
326 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
327 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
328 | key->type = KEY_RSA1; | |
329 | return (ret); | |
330 | } | |
331 | ||
332 | static void | |
333 | mm_send_debug(Buffer *m) | |
334 | { | |
335 | char *msg; | |
336 | ||
337 | while (buffer_len(m)) { | |
338 | msg = buffer_get_string(m, NULL); | |
1588c277 | 339 | debug3("%s: Sending debug: %s", __func__, msg); |
1853d1ef | 340 | packet_send_debug("%s", msg); |
341 | xfree(msg); | |
342 | } | |
343 | } | |
344 | ||
345 | int | |
346 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
347 | { | |
348 | Buffer m; | |
349 | u_char *blob; | |
350 | u_int len; | |
92e15201 | 351 | int allowed = 0, have_forced = 0; |
1853d1ef | 352 | |
1588c277 | 353 | debug3("%s entering", __func__); |
1853d1ef | 354 | |
355 | /* Convert the key to a blob and the pass it over */ | |
356 | if (!key_to_blob(key, &blob, &len)) | |
357 | return (0); | |
358 | ||
359 | buffer_init(&m); | |
360 | buffer_put_int(&m, type); | |
361 | buffer_put_cstring(&m, user ? user : ""); | |
362 | buffer_put_cstring(&m, host ? host : ""); | |
363 | buffer_put_string(&m, blob, len); | |
364 | xfree(blob); | |
365 | ||
b5a28cbc | 366 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); |
1853d1ef | 367 | |
1588c277 | 368 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
b5a28cbc | 369 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
1853d1ef | 370 | |
371 | allowed = buffer_get_int(&m); | |
372 | ||
92e15201 | 373 | /* fake forced command */ |
374 | auth_clear_options(); | |
375 | have_forced = buffer_get_int(&m); | |
376 | forced_command = have_forced ? xstrdup("true") : NULL; | |
377 | ||
1853d1ef | 378 | /* Send potential debug messages */ |
379 | mm_send_debug(&m); | |
380 | ||
381 | buffer_free(&m); | |
382 | ||
383 | return (allowed); | |
384 | } | |
385 | ||
386 | /* | |
387 | * This key verify needs to send the key type along, because the | |
388 | * privileged parent makes the decision if the key is allowed | |
389 | * for authentication. | |
390 | */ | |
391 | ||
392 | int | |
393 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
394 | { | |
395 | Buffer m; | |
396 | u_char *blob; | |
397 | u_int len; | |
398 | int verified = 0; | |
399 | ||
1588c277 | 400 | debug3("%s entering", __func__); |
1853d1ef | 401 | |
402 | /* Convert the key to a blob and the pass it over */ | |
403 | if (!key_to_blob(key, &blob, &len)) | |
404 | return (0); | |
405 | ||
406 | buffer_init(&m); | |
407 | buffer_put_string(&m, blob, len); | |
408 | buffer_put_string(&m, sig, siglen); | |
409 | buffer_put_string(&m, data, datalen); | |
410 | xfree(blob); | |
411 | ||
b5a28cbc | 412 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); |
1853d1ef | 413 | |
1588c277 | 414 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
b5a28cbc | 415 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
1853d1ef | 416 | |
417 | verified = buffer_get_int(&m); | |
418 | ||
419 | buffer_free(&m); | |
420 | ||
421 | return (verified); | |
422 | } | |
423 | ||
424 | /* Export key state after authentication */ | |
425 | Newkeys * | |
426 | mm_newkeys_from_blob(u_char *blob, int blen) | |
427 | { | |
428 | Buffer b; | |
429 | u_int len; | |
430 | Newkeys *newkey = NULL; | |
431 | Enc *enc; | |
432 | Mac *mac; | |
433 | Comp *comp; | |
434 | ||
1588c277 | 435 | debug3("%s: %p(%d)", __func__, blob, blen); |
1853d1ef | 436 | #ifdef DEBUG_PK |
437 | dump_base64(stderr, blob, blen); | |
438 | #endif | |
439 | buffer_init(&b); | |
440 | buffer_append(&b, blob, blen); | |
441 | ||
442 | newkey = xmalloc(sizeof(*newkey)); | |
443 | enc = &newkey->enc; | |
444 | mac = &newkey->mac; | |
445 | comp = &newkey->comp; | |
446 | ||
447 | /* Enc structure */ | |
448 | enc->name = buffer_get_string(&b, NULL); | |
449 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
450 | enc->enabled = buffer_get_int(&b); | |
451 | enc->block_size = buffer_get_int(&b); | |
452 | enc->key = buffer_get_string(&b, &enc->key_len); | |
453 | enc->iv = buffer_get_string(&b, &len); | |
454 | if (len != enc->block_size) | |
bb0640b2 | 455 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
1853d1ef | 456 | enc->block_size, len); |
457 | ||
458 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
1588c277 | 459 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
1853d1ef | 460 | enc->name, enc->cipher); |
461 | ||
462 | /* Mac structure */ | |
463 | mac->name = buffer_get_string(&b, NULL); | |
464 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
1588c277 | 465 | fatal("%s: can not init mac %s", __func__, mac->name); |
1853d1ef | 466 | mac->enabled = buffer_get_int(&b); |
467 | mac->key = buffer_get_string(&b, &len); | |
468 | if (len > mac->key_len) | |
bb0640b2 | 469 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
1853d1ef | 470 | mac->key_len); |
471 | mac->key_len = len; | |
472 | ||
473 | /* Comp structure */ | |
474 | comp->type = buffer_get_int(&b); | |
475 | comp->enabled = buffer_get_int(&b); | |
476 | comp->name = buffer_get_string(&b, NULL); | |
477 | ||
478 | len = buffer_len(&b); | |
479 | if (len != 0) | |
bb0640b2 | 480 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
1853d1ef | 481 | buffer_free(&b); |
482 | return (newkey); | |
483 | } | |
484 | ||
485 | int | |
486 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
487 | { | |
488 | Buffer b; | |
489 | int len; | |
1853d1ef | 490 | Enc *enc; |
491 | Mac *mac; | |
492 | Comp *comp; | |
493 | Newkeys *newkey = newkeys[mode]; | |
494 | ||
1588c277 | 495 | debug3("%s: converting %p", __func__, newkey); |
1853d1ef | 496 | |
497 | if (newkey == NULL) { | |
1588c277 | 498 | error("%s: newkey == NULL", __func__); |
1853d1ef | 499 | return 0; |
500 | } | |
501 | enc = &newkey->enc; | |
502 | mac = &newkey->mac; | |
503 | comp = &newkey->comp; | |
504 | ||
505 | buffer_init(&b); | |
506 | /* Enc structure */ | |
507 | buffer_put_cstring(&b, enc->name); | |
508 | /* The cipher struct is constant and shared, you export pointer */ | |
509 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
510 | buffer_put_int(&b, enc->enabled); | |
511 | buffer_put_int(&b, enc->block_size); | |
512 | buffer_put_string(&b, enc->key, enc->key_len); | |
513 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
514 | buffer_put_string(&b, enc->iv, enc->block_size); | |
515 | ||
516 | /* Mac structure */ | |
517 | buffer_put_cstring(&b, mac->name); | |
518 | buffer_put_int(&b, mac->enabled); | |
519 | buffer_put_string(&b, mac->key, mac->key_len); | |
520 | ||
521 | /* Comp structure */ | |
522 | buffer_put_int(&b, comp->type); | |
523 | buffer_put_int(&b, comp->enabled); | |
524 | buffer_put_cstring(&b, comp->name); | |
525 | ||
526 | len = buffer_len(&b); | |
1853d1ef | 527 | if (lenp != NULL) |
528 | *lenp = len; | |
eb9f2fab | 529 | if (blobp != NULL) { |
530 | *blobp = xmalloc(len); | |
531 | memcpy(*blobp, buffer_ptr(&b), len); | |
532 | } | |
533 | memset(buffer_ptr(&b), 0, len); | |
534 | buffer_free(&b); | |
1853d1ef | 535 | return len; |
536 | } | |
537 | ||
538 | static void | |
539 | mm_send_kex(Buffer *m, Kex *kex) | |
540 | { | |
541 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
542 | buffer_put_int(m, kex->we_need); | |
543 | buffer_put_int(m, kex->hostkey_type); | |
544 | buffer_put_int(m, kex->kex_type); | |
545 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
546 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
547 | buffer_put_int(m, kex->flags); | |
548 | buffer_put_cstring(m, kex->client_version_string); | |
549 | buffer_put_cstring(m, kex->server_version_string); | |
550 | } | |
551 | ||
552 | void | |
ca75d7de | 553 | mm_send_keystate(struct monitor *monitor) |
1853d1ef | 554 | { |
555 | Buffer m; | |
556 | u_char *blob, *p; | |
557 | u_int bloblen, plen; | |
ffd7b36b | 558 | u_int32_t seqnr, packets; |
559 | u_int64_t blocks; | |
1853d1ef | 560 | |
561 | buffer_init(&m); | |
562 | ||
563 | if (!compat20) { | |
564 | u_char iv[24]; | |
9459414c | 565 | u_char *key; |
566 | u_int ivlen, keylen; | |
1853d1ef | 567 | |
568 | buffer_put_int(&m, packet_get_protocol_flags()); | |
569 | ||
570 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
571 | ||
9459414c | 572 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
573 | keylen = packet_get_encryption_key(NULL); | |
574 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
575 | keylen = packet_get_encryption_key(key); | |
576 | buffer_put_string(&m, key, keylen); | |
577 | memset(key, 0, keylen); | |
578 | xfree(key); | |
579 | ||
1853d1ef | 580 | ivlen = packet_get_keyiv_len(MODE_OUT); |
581 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
582 | buffer_put_string(&m, iv, ivlen); | |
583 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
584 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
585 | buffer_put_string(&m, iv, ivlen); | |
586 | goto skip; | |
587 | } else { | |
588 | /* Kex for rekeying */ | |
ca75d7de | 589 | mm_send_kex(&m, *monitor->m_pkex); |
1853d1ef | 590 | } |
591 | ||
592 | debug3("%s: Sending new keys: %p %p", | |
1588c277 | 593 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
1853d1ef | 594 | |
595 | /* Keys from Kex */ | |
596 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
1588c277 | 597 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 598 | |
599 | buffer_put_string(&m, blob, bloblen); | |
600 | xfree(blob); | |
601 | ||
602 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
1588c277 | 603 | fatal("%s: conversion of newkeys failed", __func__); |
1853d1ef | 604 | |
605 | buffer_put_string(&m, blob, bloblen); | |
606 | xfree(blob); | |
607 | ||
ffd7b36b | 608 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
609 | buffer_put_int(&m, seqnr); | |
610 | buffer_put_int64(&m, blocks); | |
611 | buffer_put_int(&m, packets); | |
806e4c11 | 612 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); |
ffd7b36b | 613 | buffer_put_int(&m, seqnr); |
614 | buffer_put_int64(&m, blocks); | |
615 | buffer_put_int(&m, packets); | |
1853d1ef | 616 | |
1588c277 | 617 | debug3("%s: New keys have been sent", __func__); |
1853d1ef | 618 | skip: |
619 | /* More key context */ | |
620 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
621 | p = xmalloc(plen+1); | |
622 | packet_get_keycontext(MODE_OUT, p); | |
623 | buffer_put_string(&m, p, plen); | |
624 | xfree(p); | |
625 | ||
626 | plen = packet_get_keycontext(MODE_IN, NULL); | |
627 | p = xmalloc(plen+1); | |
628 | packet_get_keycontext(MODE_IN, p); | |
629 | buffer_put_string(&m, p, plen); | |
630 | xfree(p); | |
631 | ||
632 | /* Compression state */ | |
1588c277 | 633 | debug3("%s: Sending compression state", __func__); |
1853d1ef | 634 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
635 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
636 | ||
637 | /* Network I/O buffers */ | |
638 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
639 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
640 | ||
ca75d7de | 641 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
1588c277 | 642 | debug3("%s: Finished sending state", __func__); |
1853d1ef | 643 | |
644 | buffer_free(&m); | |
645 | } | |
646 | ||
647 | int | |
148de80c | 648 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
1853d1ef | 649 | { |
650 | Buffer m; | |
be2ca0c9 | 651 | char *p, *msg; |
1853d1ef | 652 | int success = 0; |
653 | ||
654 | buffer_init(&m); | |
b5a28cbc | 655 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); |
1853d1ef | 656 | |
1588c277 | 657 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
b5a28cbc | 658 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
1853d1ef | 659 | |
660 | success = buffer_get_int(&m); | |
661 | if (success == 0) { | |
1588c277 | 662 | debug3("%s: pty alloc failed", __func__); |
1853d1ef | 663 | buffer_free(&m); |
664 | return (0); | |
665 | } | |
666 | p = buffer_get_string(&m, NULL); | |
be2ca0c9 | 667 | msg = buffer_get_string(&m, NULL); |
1853d1ef | 668 | buffer_free(&m); |
669 | ||
670 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
671 | xfree(p); | |
672 | ||
be2ca0c9 | 673 | buffer_append(&loginmsg, msg, strlen(msg)); |
674 | xfree(msg); | |
675 | ||
b5a28cbc | 676 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
677 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
1853d1ef | 678 | |
679 | /* Success */ | |
680 | return (1); | |
681 | } | |
682 | ||
683 | void | |
2362db19 | 684 | mm_session_pty_cleanup2(Session *s) |
1853d1ef | 685 | { |
1853d1ef | 686 | Buffer m; |
687 | ||
688 | if (s->ttyfd == -1) | |
689 | return; | |
690 | buffer_init(&m); | |
691 | buffer_put_cstring(&m, s->tty); | |
b5a28cbc | 692 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); |
1853d1ef | 693 | buffer_free(&m); |
694 | ||
695 | /* closed dup'ed master */ | |
696 | if (close(s->ptymaster) < 0) | |
697 | error("close(s->ptymaster): %s", strerror(errno)); | |
698 | ||
699 | /* unlink pty from session */ | |
700 | s->ttyfd = -1; | |
701 | } | |
702 | ||
ad200abb | 703 | #ifdef USE_PAM |
704 | void | |
529d73ab | 705 | mm_start_pam(Authctxt *authctxt) |
ad200abb | 706 | { |
707 | Buffer m; | |
708 | ||
1588c277 | 709 | debug3("%s entering", __func__); |
7fceb20d | 710 | if (!options.use_pam) |
711 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
ad200abb | 712 | |
713 | buffer_init(&m); | |
b5a28cbc | 714 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
ad200abb | 715 | |
716 | buffer_free(&m); | |
717 | } | |
05114c74 | 718 | |
5b9e2464 | 719 | u_int |
720 | mm_do_pam_account(void) | |
721 | { | |
722 | Buffer m; | |
723 | u_int ret; | |
ba6dd90e | 724 | char *msg; |
5b9e2464 | 725 | |
726 | debug3("%s entering", __func__); | |
727 | if (!options.use_pam) | |
728 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
729 | ||
730 | buffer_init(&m); | |
731 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
732 | ||
aff51935 | 733 | mm_request_receive_expect(pmonitor->m_recvfd, |
5b9e2464 | 734 | MONITOR_ANS_PAM_ACCOUNT, &m); |
735 | ret = buffer_get_int(&m); | |
ba6dd90e | 736 | msg = buffer_get_string(&m, NULL); |
737 | buffer_append(&loginmsg, msg, strlen(msg)); | |
738 | xfree(msg); | |
5b9e2464 | 739 | |
740 | buffer_free(&m); | |
b6453d99 | 741 | |
5b9e2464 | 742 | debug3("%s returning %d", __func__, ret); |
743 | ||
744 | return (ret); | |
745 | } | |
746 | ||
05114c74 | 747 | void * |
748 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
749 | { | |
750 | Buffer m; | |
751 | int success; | |
752 | ||
753 | debug3("%s", __func__); | |
754 | buffer_init(&m); | |
755 | buffer_put_cstring(&m, authctxt->user); | |
756 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
757 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
758 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
759 | success = buffer_get_int(&m); | |
760 | if (success == 0) { | |
761 | debug3("%s: pam_init_ctx failed", __func__); | |
762 | buffer_free(&m); | |
763 | return (NULL); | |
764 | } | |
765 | buffer_free(&m); | |
766 | return (authctxt); | |
767 | } | |
768 | ||
769 | int | |
770 | mm_sshpam_query(void *ctx, char **name, char **info, | |
771 | u_int *num, char ***prompts, u_int **echo_on) | |
772 | { | |
773 | Buffer m; | |
a1a073cc | 774 | u_int i; |
775 | int ret; | |
05114c74 | 776 | |
777 | debug3("%s", __func__); | |
778 | buffer_init(&m); | |
779 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
780 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
781 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
782 | ret = buffer_get_int(&m); | |
783 | debug3("%s: pam_query returned %d", __func__, ret); | |
784 | *name = buffer_get_string(&m, NULL); | |
785 | *info = buffer_get_string(&m, NULL); | |
786 | *num = buffer_get_int(&m); | |
01d35895 | 787 | if (*num > PAM_MAX_NUM_MSG) |
788 | fatal("%s: recieved %u PAM messages, expected <= %u", | |
789 | __func__, *num, PAM_MAX_NUM_MSG); | |
790 | *prompts = xcalloc((*num + 1), sizeof(char *)); | |
791 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); | |
05114c74 | 792 | for (i = 0; i < *num; ++i) { |
793 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
794 | (*echo_on)[i] = buffer_get_int(&m); | |
795 | } | |
796 | buffer_free(&m); | |
797 | return (ret); | |
798 | } | |
799 | ||
800 | int | |
801 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
802 | { | |
803 | Buffer m; | |
a1a073cc | 804 | u_int i; |
805 | int ret; | |
05114c74 | 806 | |
807 | debug3("%s", __func__); | |
808 | buffer_init(&m); | |
809 | buffer_put_int(&m, num); | |
810 | for (i = 0; i < num; ++i) | |
811 | buffer_put_cstring(&m, resp[i]); | |
812 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
813 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
814 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
815 | ret = buffer_get_int(&m); | |
816 | debug3("%s: pam_respond returned %d", __func__, ret); | |
817 | buffer_free(&m); | |
818 | return (ret); | |
819 | } | |
820 | ||
821 | void | |
822 | mm_sshpam_free_ctx(void *ctxtp) | |
823 | { | |
824 | Buffer m; | |
825 | ||
826 | debug3("%s", __func__); | |
827 | buffer_init(&m); | |
828 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
829 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
830 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
831 | buffer_free(&m); | |
832 | } | |
ad200abb | 833 | #endif /* USE_PAM */ |
834 | ||
1853d1ef | 835 | /* Request process termination */ |
836 | ||
837 | void | |
838 | mm_terminate(void) | |
839 | { | |
840 | Buffer m; | |
841 | ||
842 | buffer_init(&m); | |
b5a28cbc | 843 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); |
1853d1ef | 844 | buffer_free(&m); |
845 | } | |
846 | ||
847 | int | |
848 | mm_ssh1_session_key(BIGNUM *num) | |
849 | { | |
850 | int rsafail; | |
851 | Buffer m; | |
852 | ||
853 | buffer_init(&m); | |
854 | buffer_put_bignum2(&m, num); | |
b5a28cbc | 855 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); |
1853d1ef | 856 | |
b5a28cbc | 857 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); |
1853d1ef | 858 | |
859 | rsafail = buffer_get_int(&m); | |
860 | buffer_get_bignum2(&m, num); | |
861 | ||
862 | buffer_free(&m); | |
863 | ||
864 | return (rsafail); | |
865 | } | |
866 | ||
867 | static void | |
868 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
869 | char ***prompts, u_int **echo_on) | |
870 | { | |
7203d6bb | 871 | *name = xstrdup(""); |
872 | *infotxt = xstrdup(""); | |
1853d1ef | 873 | *numprompts = 1; |
52e3daed | 874 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
875 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
1853d1ef | 876 | (*echo_on)[0] = 0; |
877 | } | |
878 | ||
879 | int | |
880 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
881 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
882 | { | |
883 | Buffer m; | |
6d6c25e3 | 884 | u_int success; |
1853d1ef | 885 | char *challenge; |
886 | ||
1588c277 | 887 | debug3("%s: entering", __func__); |
1853d1ef | 888 | |
889 | buffer_init(&m); | |
b5a28cbc | 890 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); |
1853d1ef | 891 | |
b5a28cbc | 892 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, |
1853d1ef | 893 | &m); |
6d6c25e3 | 894 | success = buffer_get_int(&m); |
895 | if (success == 0) { | |
1588c277 | 896 | debug3("%s: no challenge", __func__); |
1853d1ef | 897 | buffer_free(&m); |
898 | return (-1); | |
899 | } | |
900 | ||
901 | /* Get the challenge, and format the response */ | |
902 | challenge = buffer_get_string(&m, NULL); | |
903 | buffer_free(&m); | |
904 | ||
905 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
906 | (*prompts)[0] = challenge; | |
907 | ||
1588c277 | 908 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 909 | |
910 | return (0); | |
911 | } | |
912 | ||
913 | int | |
914 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
915 | { | |
916 | Buffer m; | |
917 | int authok; | |
918 | ||
1588c277 | 919 | debug3("%s: entering", __func__); |
1853d1ef | 920 | if (numresponses != 1) |
921 | return (-1); | |
922 | ||
923 | buffer_init(&m); | |
924 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 925 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); |
1853d1ef | 926 | |
b5a28cbc | 927 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 928 | MONITOR_ANS_BSDAUTHRESPOND, &m); |
929 | ||
930 | authok = buffer_get_int(&m); | |
931 | buffer_free(&m); | |
932 | ||
933 | return ((authok == 0) ? -1 : 0); | |
934 | } | |
935 | ||
77751377 | 936 | #ifdef SKEY |
1853d1ef | 937 | int |
938 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
939 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
940 | { | |
941 | Buffer m; | |
6d6c25e3 | 942 | int len; |
943 | u_int success; | |
1853d1ef | 944 | char *p, *challenge; |
945 | ||
1588c277 | 946 | debug3("%s: entering", __func__); |
1853d1ef | 947 | |
948 | buffer_init(&m); | |
b5a28cbc | 949 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); |
1853d1ef | 950 | |
b5a28cbc | 951 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, |
1853d1ef | 952 | &m); |
6d6c25e3 | 953 | success = buffer_get_int(&m); |
954 | if (success == 0) { | |
1588c277 | 955 | debug3("%s: no challenge", __func__); |
1853d1ef | 956 | buffer_free(&m); |
957 | return (-1); | |
958 | } | |
959 | ||
960 | /* Get the challenge, and format the response */ | |
961 | challenge = buffer_get_string(&m, NULL); | |
962 | buffer_free(&m); | |
963 | ||
1588c277 | 964 | debug3("%s: received challenge: %s", __func__, challenge); |
1853d1ef | 965 | |
966 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
967 | ||
52e3daed | 968 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
1853d1ef | 969 | xfree(challenge); |
970 | ||
971 | return (0); | |
972 | } | |
973 | ||
974 | int | |
975 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
976 | { | |
977 | Buffer m; | |
978 | int authok; | |
979 | ||
1588c277 | 980 | debug3("%s: entering", __func__); |
1853d1ef | 981 | if (numresponses != 1) |
982 | return (-1); | |
983 | ||
984 | buffer_init(&m); | |
985 | buffer_put_cstring(&m, responses[0]); | |
b5a28cbc | 986 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); |
1853d1ef | 987 | |
b5a28cbc | 988 | mm_request_receive_expect(pmonitor->m_recvfd, |
1853d1ef | 989 | MONITOR_ANS_SKEYRESPOND, &m); |
990 | ||
991 | authok = buffer_get_int(&m); | |
992 | buffer_free(&m); | |
993 | ||
994 | return ((authok == 0) ? -1 : 0); | |
995 | } | |
77751377 | 996 | #endif /* SKEY */ |
1853d1ef | 997 | |
998 | void | |
999 | mm_ssh1_session_id(u_char session_id[16]) | |
1000 | { | |
1001 | Buffer m; | |
1002 | int i; | |
1003 | ||
1588c277 | 1004 | debug3("%s entering", __func__); |
1853d1ef | 1005 | |
1006 | buffer_init(&m); | |
1007 | for (i = 0; i < 16; i++) | |
1008 | buffer_put_char(&m, session_id[i]); | |
1009 | ||
b5a28cbc | 1010 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); |
1853d1ef | 1011 | buffer_free(&m); |
1012 | } | |
1013 | ||
1014 | int | |
1015 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1016 | { | |
1017 | Buffer m; | |
1018 | Key *key; | |
1019 | u_char *blob; | |
1020 | u_int blen; | |
92e15201 | 1021 | int allowed = 0, have_forced = 0; |
1853d1ef | 1022 | |
1588c277 | 1023 | debug3("%s entering", __func__); |
1853d1ef | 1024 | |
1025 | buffer_init(&m); | |
1026 | buffer_put_bignum2(&m, client_n); | |
1027 | ||
b5a28cbc | 1028 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); |
1029 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1853d1ef | 1030 | |
1031 | allowed = buffer_get_int(&m); | |
1032 | ||
92e15201 | 1033 | /* fake forced command */ |
1034 | auth_clear_options(); | |
1035 | have_forced = buffer_get_int(&m); | |
1036 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1037 | ||
1853d1ef | 1038 | if (allowed && rkey != NULL) { |
1039 | blob = buffer_get_string(&m, &blen); | |
1040 | if ((key = key_from_blob(blob, blen)) == NULL) | |
1588c277 | 1041 | fatal("%s: key_from_blob failed", __func__); |
1853d1ef | 1042 | *rkey = key; |
1043 | xfree(blob); | |
1044 | } | |
1045 | mm_send_debug(&m); | |
1046 | buffer_free(&m); | |
1047 | ||
1048 | return (allowed); | |
1049 | } | |
1050 | ||
1051 | BIGNUM * | |
1052 | mm_auth_rsa_generate_challenge(Key *key) | |
1053 | { | |
1054 | Buffer m; | |
1055 | BIGNUM *challenge; | |
1056 | u_char *blob; | |
1057 | u_int blen; | |
1058 | ||
1588c277 | 1059 | debug3("%s entering", __func__); |
1853d1ef | 1060 | |
1061 | if ((challenge = BN_new()) == NULL) | |
1588c277 | 1062 | fatal("%s: BN_new failed", __func__); |
1853d1ef | 1063 | |
1064 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1065 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1066 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1067 | key->type = KEY_RSA1; |
1068 | ||
1069 | buffer_init(&m); | |
1070 | buffer_put_string(&m, blob, blen); | |
1071 | xfree(blob); | |
1072 | ||
b5a28cbc | 1073 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); |
1074 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1853d1ef | 1075 | |
1076 | buffer_get_bignum2(&m, challenge); | |
1077 | buffer_free(&m); | |
1078 | ||
1079 | return (challenge); | |
1080 | } | |
1081 | ||
1082 | int | |
1083 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1084 | { | |
1085 | Buffer m; | |
1086 | u_char *blob; | |
1087 | u_int blen; | |
1088 | int success = 0; | |
1089 | ||
1588c277 | 1090 | debug3("%s entering", __func__); |
1853d1ef | 1091 | |
1092 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1093 | if (key_to_blob(key, &blob, &blen) == 0) | |
1588c277 | 1094 | fatal("%s: key_to_blob failed", __func__); |
1853d1ef | 1095 | key->type = KEY_RSA1; |
1096 | ||
1097 | buffer_init(&m); | |
1098 | buffer_put_string(&m, blob, blen); | |
1099 | buffer_put_string(&m, response, 16); | |
1100 | xfree(blob); | |
1101 | ||
b5a28cbc | 1102 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); |
1103 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1853d1ef | 1104 | |
1105 | success = buffer_get_int(&m); | |
1106 | buffer_free(&m); | |
1107 | ||
1108 | return (success); | |
1109 | } | |
696f6bef | 1110 | |
6039eeef | 1111 | #ifdef SSH_AUDIT_EVENTS |
c00e4d75 | 1112 | void |
1113 | mm_audit_event(ssh_audit_event_t event) | |
1114 | { | |
1115 | Buffer m; | |
1116 | ||
1117 | debug3("%s entering", __func__); | |
1118 | ||
1119 | buffer_init(&m); | |
1120 | buffer_put_int(&m, event); | |
1121 | ||
1122 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1123 | buffer_free(&m); | |
1124 | } | |
1125 | ||
1126 | void | |
1127 | mm_audit_run_command(const char *command) | |
1128 | { | |
1129 | Buffer m; | |
1130 | ||
1131 | debug3("%s entering command %s", __func__, command); | |
1132 | ||
1133 | buffer_init(&m); | |
1134 | buffer_put_cstring(&m, command); | |
1135 | ||
1136 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1137 | buffer_free(&m); | |
1138 | } | |
6039eeef | 1139 | #endif /* SSH_AUDIT_EVENTS */ |
c00e4d75 | 1140 | |
7364bd04 | 1141 | #ifdef GSSAPI |
1142 | OM_uint32 | |
ca75d7de | 1143 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
7364bd04 | 1144 | { |
1145 | Buffer m; | |
1146 | OM_uint32 major; | |
1147 | ||
1148 | /* Client doesn't get to see the context */ | |
1149 | *ctx = NULL; | |
1150 | ||
1151 | buffer_init(&m); | |
ca75d7de | 1152 | buffer_put_string(&m, goid->elements, goid->length); |
7364bd04 | 1153 | |
1154 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); | |
1155 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1156 | ||
1157 | major = buffer_get_int(&m); | |
1158 | ||
1159 | buffer_free(&m); | |
1160 | return (major); | |
1161 | } | |
1162 | ||
1163 | OM_uint32 | |
1164 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1165 | gss_buffer_desc *out, OM_uint32 *flags) | |
1166 | { | |
1167 | Buffer m; | |
1168 | OM_uint32 major; | |
f99e1ca4 | 1169 | u_int len; |
7364bd04 | 1170 | |
1171 | buffer_init(&m); | |
1172 | buffer_put_string(&m, in->value, in->length); | |
1173 | ||
1174 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); | |
1175 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
1176 | ||
1177 | major = buffer_get_int(&m); | |
f99e1ca4 | 1178 | out->value = buffer_get_string(&m, &len); |
1179 | out->length = len; | |
7364bd04 | 1180 | if (flags) |
1181 | *flags = buffer_get_int(&m); | |
1182 | ||
1183 | buffer_free(&m); | |
1184 | ||
1185 | return (major); | |
1186 | } | |
1187 | ||
0789992b | 1188 | OM_uint32 |
1189 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1190 | { | |
1191 | Buffer m; | |
1192 | OM_uint32 major; | |
1193 | ||
1194 | buffer_init(&m); | |
1195 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1196 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1197 | ||
1198 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1199 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1200 | &m); | |
1201 | ||
1202 | major = buffer_get_int(&m); | |
1203 | buffer_free(&m); | |
1204 | return(major); | |
1205 | } | |
1206 | ||
7364bd04 | 1207 | int |
1208 | mm_ssh_gssapi_userok(char *user) | |
1209 | { | |
1210 | Buffer m; | |
1211 | int authenticated = 0; | |
1212 | ||
1213 | buffer_init(&m); | |
1214 | ||
1215 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); | |
1216 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1217 | &m); | |
1218 | ||
1219 | authenticated = buffer_get_int(&m); | |
1220 | ||
1221 | buffer_free(&m); | |
1222 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); | |
1223 | return (authenticated); | |
1224 | } | |
1225 | #endif /* GSSAPI */ |