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826f3a39 | 1 | /* |
2 | * Copyright 2002 Niels Provos <provos@citi.umich.edu> | |
3 | * Copyright 2002 Markus Friedl <markus@openbsd.org> | |
4 | * All rights reserved. | |
5 | * | |
6 | * Redistribution and use in source and binary forms, with or without | |
7 | * modification, are permitted provided that the following conditions | |
8 | * are met: | |
9 | * 1. Redistributions of source code must retain the above copyright | |
10 | * notice, this list of conditions and the following disclaimer. | |
11 | * 2. Redistributions in binary form must reproduce the above copyright | |
12 | * notice, this list of conditions and the following disclaimer in the | |
13 | * documentation and/or other materials provided with the distribution. | |
14 | * | |
15 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
16 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
17 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
18 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
19 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
20 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
21 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
22 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
23 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
24 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
25 | */ | |
26 | ||
27 | #include "includes.h" | |
2ce0bfe4 | 28 | RCSID("$OpenBSD: monitor_wrap.c,v 1.40 2005/05/24 17:32:43 avsm Exp $"); |
826f3a39 | 29 | |
30 | #include <openssl/bn.h> | |
31 | #include <openssl/dh.h> | |
32 | ||
33 | #include "ssh.h" | |
34 | #include "dh.h" | |
35 | #include "kex.h" | |
36 | #include "auth.h" | |
bfe49944 | 37 | #include "auth-options.h" |
826f3a39 | 38 | #include "buffer.h" |
39 | #include "bufaux.h" | |
40 | #include "packet.h" | |
41 | #include "mac.h" | |
42 | #include "log.h" | |
12a403af | 43 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
44 | #undef TARGET_OS_MAC | |
826f3a39 | 45 | #include "zlib.h" |
12a403af | 46 | #define TARGET_OS_MAC 1 |
47 | #else | |
48 | #include "zlib.h" | |
49 | #endif | |
826f3a39 | 50 | #include "monitor.h" |
51 | #include "monitor_wrap.h" | |
52 | #include "xmalloc.h" | |
53 | #include "atomicio.h" | |
54 | #include "monitor_fdpass.h" | |
55 | #include "getput.h" | |
7cac2b65 | 56 | #include "servconf.h" |
826f3a39 | 57 | |
58 | #include "auth.h" | |
59 | #include "channels.h" | |
60 | #include "session.h" | |
61 | ||
b59afbfe | 62 | #ifdef GSSAPI |
63 | #include "ssh-gss.h" | |
64 | #endif | |
65 | ||
826f3a39 | 66 | /* Imports */ |
67 | extern int compat20; | |
68 | extern Newkeys *newkeys[]; | |
69 | extern z_stream incoming_stream; | |
70 | extern z_stream outgoing_stream; | |
71 | extern struct monitor *pmonitor; | |
72 | extern Buffer input, output; | |
7e82606e | 73 | extern Buffer loginmsg; |
7cac2b65 | 74 | extern ServerOptions options; |
826f3a39 | 75 | |
540d72c3 | 76 | int |
77 | mm_is_monitor(void) | |
78 | { | |
79 | /* | |
80 | * m_pid is only set in the privileged part, and | |
81 | * points to the unprivileged child. | |
82 | */ | |
83 | return (pmonitor && pmonitor->m_pid > 0); | |
84 | } | |
85 | ||
826f3a39 | 86 | void |
7e82606e | 87 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
826f3a39 | 88 | { |
826f3a39 | 89 | u_int mlen = buffer_len(m); |
d03f4262 | 90 | u_char buf[5]; |
826f3a39 | 91 | |
44a053a3 | 92 | debug3("%s entering: type %d", __func__, type); |
826f3a39 | 93 | |
94 | PUT_32BIT(buf, mlen + 1); | |
44a053a3 | 95 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
7e82606e | 96 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
2ce0bfe4 | 97 | fatal("%s: write: %s", __func__, strerror(errno)); |
7e82606e | 98 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
2ce0bfe4 | 99 | fatal("%s: write: %s", __func__, strerror(errno)); |
826f3a39 | 100 | } |
101 | ||
102 | void | |
7e82606e | 103 | mm_request_receive(int sock, Buffer *m) |
826f3a39 | 104 | { |
105 | u_char buf[4]; | |
826f3a39 | 106 | u_int msg_len; |
107 | ||
44a053a3 | 108 | debug3("%s entering", __func__); |
826f3a39 | 109 | |
2ce0bfe4 | 110 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
111 | if (errno == EPIPE) | |
540d72c3 | 112 | cleanup_exit(255); |
2ce0bfe4 | 113 | fatal("%s: read: %s", __func__, strerror(errno)); |
826f3a39 | 114 | } |
115 | msg_len = GET_32BIT(buf); | |
116 | if (msg_len > 256 * 1024) | |
44a053a3 | 117 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
826f3a39 | 118 | buffer_clear(m); |
119 | buffer_append_space(m, msg_len); | |
2ce0bfe4 | 120 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
121 | fatal("%s: read: %s", __func__, strerror(errno)); | |
826f3a39 | 122 | } |
123 | ||
124 | void | |
7e82606e | 125 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
826f3a39 | 126 | { |
127 | u_char rtype; | |
128 | ||
44a053a3 | 129 | debug3("%s entering: type %d", __func__, type); |
826f3a39 | 130 | |
7e82606e | 131 | mm_request_receive(sock, m); |
826f3a39 | 132 | rtype = buffer_get_char(m); |
133 | if (rtype != type) | |
44a053a3 | 134 | fatal("%s: read: rtype %d != type %d", __func__, |
826f3a39 | 135 | rtype, type); |
136 | } | |
137 | ||
138 | DH * | |
139 | mm_choose_dh(int min, int nbits, int max) | |
140 | { | |
141 | BIGNUM *p, *g; | |
142 | int success = 0; | |
143 | Buffer m; | |
144 | ||
145 | buffer_init(&m); | |
146 | buffer_put_int(&m, min); | |
147 | buffer_put_int(&m, nbits); | |
148 | buffer_put_int(&m, max); | |
149 | ||
150 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); | |
151 | ||
44a053a3 | 152 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
826f3a39 | 153 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
154 | ||
155 | success = buffer_get_char(&m); | |
156 | if (success == 0) | |
44a053a3 | 157 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
826f3a39 | 158 | |
159 | if ((p = BN_new()) == NULL) | |
44a053a3 | 160 | fatal("%s: BN_new failed", __func__); |
826f3a39 | 161 | if ((g = BN_new()) == NULL) |
44a053a3 | 162 | fatal("%s: BN_new failed", __func__); |
826f3a39 | 163 | buffer_get_bignum2(&m, p); |
164 | buffer_get_bignum2(&m, g); | |
165 | ||
44a053a3 | 166 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
826f3a39 | 167 | buffer_free(&m); |
168 | ||
169 | return (dh_new_group(g, p)); | |
170 | } | |
171 | ||
172 | int | |
173 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
174 | { | |
175 | Kex *kex = *pmonitor->m_pkex; | |
176 | Buffer m; | |
177 | ||
44a053a3 | 178 | debug3("%s entering", __func__); |
826f3a39 | 179 | |
180 | buffer_init(&m); | |
181 | buffer_put_int(&m, kex->host_key_index(key)); | |
182 | buffer_put_string(&m, data, datalen); | |
183 | ||
184 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); | |
185 | ||
44a053a3 | 186 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
826f3a39 | 187 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
188 | *sigp = buffer_get_string(&m, lenp); | |
189 | buffer_free(&m); | |
190 | ||
191 | return (0); | |
192 | } | |
193 | ||
194 | struct passwd * | |
7e82606e | 195 | mm_getpwnamallow(const char *username) |
826f3a39 | 196 | { |
197 | Buffer m; | |
198 | struct passwd *pw; | |
199 | u_int pwlen; | |
200 | ||
44a053a3 | 201 | debug3("%s entering", __func__); |
826f3a39 | 202 | |
203 | buffer_init(&m); | |
7e82606e | 204 | buffer_put_cstring(&m, username); |
826f3a39 | 205 | |
206 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); | |
207 | ||
44a053a3 | 208 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
826f3a39 | 209 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
210 | ||
211 | if (buffer_get_char(&m) == 0) { | |
212 | buffer_free(&m); | |
213 | return (NULL); | |
214 | } | |
215 | pw = buffer_get_string(&m, &pwlen); | |
216 | if (pwlen != sizeof(struct passwd)) | |
44a053a3 | 217 | fatal("%s: struct passwd size mismatch", __func__); |
826f3a39 | 218 | pw->pw_name = buffer_get_string(&m, NULL); |
219 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
220 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
221 | #ifdef HAVE_PW_CLASS_IN_PASSWD | |
222 | pw->pw_class = buffer_get_string(&m, NULL); | |
223 | #endif | |
224 | pw->pw_dir = buffer_get_string(&m, NULL); | |
225 | pw->pw_shell = buffer_get_string(&m, NULL); | |
226 | buffer_free(&m); | |
227 | ||
228 | return (pw); | |
229 | } | |
230 | ||
540d72c3 | 231 | char * |
232 | mm_auth2_read_banner(void) | |
826f3a39 | 233 | { |
234 | Buffer m; | |
235 | char *banner; | |
236 | ||
44a053a3 | 237 | debug3("%s entering", __func__); |
826f3a39 | 238 | |
239 | buffer_init(&m); | |
240 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); | |
241 | buffer_clear(&m); | |
242 | ||
540d72c3 | 243 | mm_request_receive_expect(pmonitor->m_recvfd, |
244 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
826f3a39 | 245 | banner = buffer_get_string(&m, NULL); |
246 | buffer_free(&m); | |
44a053a3 | 247 | |
540d72c3 | 248 | /* treat empty banner as missing banner */ |
249 | if (strlen(banner) == 0) { | |
250 | xfree(banner); | |
251 | banner = NULL; | |
252 | } | |
826f3a39 | 253 | return (banner); |
254 | } | |
255 | ||
256 | /* Inform the privileged process about service and style */ | |
257 | ||
258 | void | |
259 | mm_inform_authserv(char *service, char *style) | |
260 | { | |
261 | Buffer m; | |
262 | ||
44a053a3 | 263 | debug3("%s entering", __func__); |
826f3a39 | 264 | |
265 | buffer_init(&m); | |
266 | buffer_put_cstring(&m, service); | |
267 | buffer_put_cstring(&m, style ? style : ""); | |
268 | ||
269 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); | |
270 | ||
271 | buffer_free(&m); | |
272 | } | |
273 | ||
274 | /* Do the password authentication */ | |
275 | int | |
276 | mm_auth_password(Authctxt *authctxt, char *password) | |
277 | { | |
278 | Buffer m; | |
279 | int authenticated = 0; | |
280 | ||
44a053a3 | 281 | debug3("%s entering", __func__); |
826f3a39 | 282 | |
283 | buffer_init(&m); | |
284 | buffer_put_cstring(&m, password); | |
285 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); | |
286 | ||
44a053a3 | 287 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
826f3a39 | 288 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
289 | ||
290 | authenticated = buffer_get_int(&m); | |
291 | ||
292 | buffer_free(&m); | |
293 | ||
294 | debug3("%s: user %sauthenticated", | |
44a053a3 | 295 | __func__, authenticated ? "" : "not "); |
826f3a39 | 296 | return (authenticated); |
297 | } | |
298 | ||
299 | int | |
300 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
301 | { | |
302 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
303 | } | |
304 | ||
305 | int | |
306 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
307 | Key *key) | |
308 | { | |
309 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
310 | } | |
311 | ||
312 | int | |
313 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
314 | char *host, Key *key) | |
315 | { | |
316 | int ret; | |
317 | ||
318 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
319 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
320 | key->type = KEY_RSA1; | |
321 | return (ret); | |
322 | } | |
323 | ||
324 | static void | |
325 | mm_send_debug(Buffer *m) | |
326 | { | |
327 | char *msg; | |
328 | ||
329 | while (buffer_len(m)) { | |
330 | msg = buffer_get_string(m, NULL); | |
44a053a3 | 331 | debug3("%s: Sending debug: %s", __func__, msg); |
826f3a39 | 332 | packet_send_debug("%s", msg); |
333 | xfree(msg); | |
334 | } | |
335 | } | |
336 | ||
337 | int | |
338 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
339 | { | |
340 | Buffer m; | |
341 | u_char *blob; | |
342 | u_int len; | |
bfe49944 | 343 | int allowed = 0, have_forced = 0; |
826f3a39 | 344 | |
44a053a3 | 345 | debug3("%s entering", __func__); |
826f3a39 | 346 | |
347 | /* Convert the key to a blob and the pass it over */ | |
348 | if (!key_to_blob(key, &blob, &len)) | |
349 | return (0); | |
350 | ||
351 | buffer_init(&m); | |
352 | buffer_put_int(&m, type); | |
353 | buffer_put_cstring(&m, user ? user : ""); | |
354 | buffer_put_cstring(&m, host ? host : ""); | |
355 | buffer_put_string(&m, blob, len); | |
356 | xfree(blob); | |
357 | ||
358 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); | |
359 | ||
44a053a3 | 360 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
826f3a39 | 361 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
362 | ||
363 | allowed = buffer_get_int(&m); | |
364 | ||
bfe49944 | 365 | /* fake forced command */ |
366 | auth_clear_options(); | |
367 | have_forced = buffer_get_int(&m); | |
368 | forced_command = have_forced ? xstrdup("true") : NULL; | |
369 | ||
826f3a39 | 370 | /* Send potential debug messages */ |
371 | mm_send_debug(&m); | |
372 | ||
373 | buffer_free(&m); | |
374 | ||
375 | return (allowed); | |
376 | } | |
377 | ||
378 | /* | |
379 | * This key verify needs to send the key type along, because the | |
380 | * privileged parent makes the decision if the key is allowed | |
381 | * for authentication. | |
382 | */ | |
383 | ||
384 | int | |
385 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
386 | { | |
387 | Buffer m; | |
388 | u_char *blob; | |
389 | u_int len; | |
390 | int verified = 0; | |
391 | ||
44a053a3 | 392 | debug3("%s entering", __func__); |
826f3a39 | 393 | |
394 | /* Convert the key to a blob and the pass it over */ | |
395 | if (!key_to_blob(key, &blob, &len)) | |
396 | return (0); | |
397 | ||
398 | buffer_init(&m); | |
399 | buffer_put_string(&m, blob, len); | |
400 | buffer_put_string(&m, sig, siglen); | |
401 | buffer_put_string(&m, data, datalen); | |
402 | xfree(blob); | |
403 | ||
404 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); | |
405 | ||
44a053a3 | 406 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
826f3a39 | 407 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
408 | ||
409 | verified = buffer_get_int(&m); | |
410 | ||
411 | buffer_free(&m); | |
412 | ||
413 | return (verified); | |
414 | } | |
415 | ||
416 | /* Export key state after authentication */ | |
417 | Newkeys * | |
418 | mm_newkeys_from_blob(u_char *blob, int blen) | |
419 | { | |
420 | Buffer b; | |
421 | u_int len; | |
422 | Newkeys *newkey = NULL; | |
423 | Enc *enc; | |
424 | Mac *mac; | |
425 | Comp *comp; | |
426 | ||
44a053a3 | 427 | debug3("%s: %p(%d)", __func__, blob, blen); |
826f3a39 | 428 | #ifdef DEBUG_PK |
429 | dump_base64(stderr, blob, blen); | |
430 | #endif | |
431 | buffer_init(&b); | |
432 | buffer_append(&b, blob, blen); | |
433 | ||
434 | newkey = xmalloc(sizeof(*newkey)); | |
435 | enc = &newkey->enc; | |
436 | mac = &newkey->mac; | |
437 | comp = &newkey->comp; | |
438 | ||
439 | /* Enc structure */ | |
440 | enc->name = buffer_get_string(&b, NULL); | |
441 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
442 | enc->enabled = buffer_get_int(&b); | |
443 | enc->block_size = buffer_get_int(&b); | |
444 | enc->key = buffer_get_string(&b, &enc->key_len); | |
445 | enc->iv = buffer_get_string(&b, &len); | |
446 | if (len != enc->block_size) | |
d03f4262 | 447 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
826f3a39 | 448 | enc->block_size, len); |
449 | ||
450 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
44a053a3 | 451 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
826f3a39 | 452 | enc->name, enc->cipher); |
453 | ||
454 | /* Mac structure */ | |
455 | mac->name = buffer_get_string(&b, NULL); | |
456 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
44a053a3 | 457 | fatal("%s: can not init mac %s", __func__, mac->name); |
826f3a39 | 458 | mac->enabled = buffer_get_int(&b); |
459 | mac->key = buffer_get_string(&b, &len); | |
460 | if (len > mac->key_len) | |
d03f4262 | 461 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
826f3a39 | 462 | mac->key_len); |
463 | mac->key_len = len; | |
464 | ||
465 | /* Comp structure */ | |
466 | comp->type = buffer_get_int(&b); | |
467 | comp->enabled = buffer_get_int(&b); | |
468 | comp->name = buffer_get_string(&b, NULL); | |
469 | ||
470 | len = buffer_len(&b); | |
471 | if (len != 0) | |
d03f4262 | 472 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
826f3a39 | 473 | buffer_free(&b); |
474 | return (newkey); | |
475 | } | |
476 | ||
477 | int | |
478 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
479 | { | |
480 | Buffer b; | |
481 | int len; | |
826f3a39 | 482 | Enc *enc; |
483 | Mac *mac; | |
484 | Comp *comp; | |
485 | Newkeys *newkey = newkeys[mode]; | |
486 | ||
44a053a3 | 487 | debug3("%s: converting %p", __func__, newkey); |
826f3a39 | 488 | |
489 | if (newkey == NULL) { | |
44a053a3 | 490 | error("%s: newkey == NULL", __func__); |
826f3a39 | 491 | return 0; |
492 | } | |
493 | enc = &newkey->enc; | |
494 | mac = &newkey->mac; | |
495 | comp = &newkey->comp; | |
496 | ||
497 | buffer_init(&b); | |
498 | /* Enc structure */ | |
499 | buffer_put_cstring(&b, enc->name); | |
500 | /* The cipher struct is constant and shared, you export pointer */ | |
501 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
502 | buffer_put_int(&b, enc->enabled); | |
503 | buffer_put_int(&b, enc->block_size); | |
504 | buffer_put_string(&b, enc->key, enc->key_len); | |
505 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
506 | buffer_put_string(&b, enc->iv, enc->block_size); | |
507 | ||
508 | /* Mac structure */ | |
509 | buffer_put_cstring(&b, mac->name); | |
510 | buffer_put_int(&b, mac->enabled); | |
511 | buffer_put_string(&b, mac->key, mac->key_len); | |
512 | ||
513 | /* Comp structure */ | |
514 | buffer_put_int(&b, comp->type); | |
515 | buffer_put_int(&b, comp->enabled); | |
516 | buffer_put_cstring(&b, comp->name); | |
517 | ||
518 | len = buffer_len(&b); | |
826f3a39 | 519 | if (lenp != NULL) |
520 | *lenp = len; | |
d03f4262 | 521 | if (blobp != NULL) { |
522 | *blobp = xmalloc(len); | |
523 | memcpy(*blobp, buffer_ptr(&b), len); | |
524 | } | |
525 | memset(buffer_ptr(&b), 0, len); | |
526 | buffer_free(&b); | |
826f3a39 | 527 | return len; |
528 | } | |
529 | ||
530 | static void | |
531 | mm_send_kex(Buffer *m, Kex *kex) | |
532 | { | |
533 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
534 | buffer_put_int(m, kex->we_need); | |
535 | buffer_put_int(m, kex->hostkey_type); | |
536 | buffer_put_int(m, kex->kex_type); | |
537 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
538 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
539 | buffer_put_int(m, kex->flags); | |
540 | buffer_put_cstring(m, kex->client_version_string); | |
541 | buffer_put_cstring(m, kex->server_version_string); | |
542 | } | |
543 | ||
544 | void | |
7e82606e | 545 | mm_send_keystate(struct monitor *monitor) |
826f3a39 | 546 | { |
547 | Buffer m; | |
548 | u_char *blob, *p; | |
549 | u_int bloblen, plen; | |
7cac2b65 | 550 | u_int32_t seqnr, packets; |
551 | u_int64_t blocks; | |
826f3a39 | 552 | |
553 | buffer_init(&m); | |
554 | ||
555 | if (!compat20) { | |
556 | u_char iv[24]; | |
44a053a3 | 557 | u_char *key; |
558 | u_int ivlen, keylen; | |
826f3a39 | 559 | |
560 | buffer_put_int(&m, packet_get_protocol_flags()); | |
561 | ||
562 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
563 | ||
44a053a3 | 564 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
565 | keylen = packet_get_encryption_key(NULL); | |
566 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
567 | keylen = packet_get_encryption_key(key); | |
568 | buffer_put_string(&m, key, keylen); | |
569 | memset(key, 0, keylen); | |
570 | xfree(key); | |
571 | ||
826f3a39 | 572 | ivlen = packet_get_keyiv_len(MODE_OUT); |
573 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
574 | buffer_put_string(&m, iv, ivlen); | |
575 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
576 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
577 | buffer_put_string(&m, iv, ivlen); | |
578 | goto skip; | |
579 | } else { | |
580 | /* Kex for rekeying */ | |
7e82606e | 581 | mm_send_kex(&m, *monitor->m_pkex); |
826f3a39 | 582 | } |
583 | ||
584 | debug3("%s: Sending new keys: %p %p", | |
44a053a3 | 585 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
826f3a39 | 586 | |
587 | /* Keys from Kex */ | |
588 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
44a053a3 | 589 | fatal("%s: conversion of newkeys failed", __func__); |
826f3a39 | 590 | |
591 | buffer_put_string(&m, blob, bloblen); | |
592 | xfree(blob); | |
593 | ||
594 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
44a053a3 | 595 | fatal("%s: conversion of newkeys failed", __func__); |
826f3a39 | 596 | |
597 | buffer_put_string(&m, blob, bloblen); | |
598 | xfree(blob); | |
599 | ||
7cac2b65 | 600 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
601 | buffer_put_int(&m, seqnr); | |
602 | buffer_put_int64(&m, blocks); | |
603 | buffer_put_int(&m, packets); | |
604 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); | |
605 | buffer_put_int(&m, seqnr); | |
606 | buffer_put_int64(&m, blocks); | |
607 | buffer_put_int(&m, packets); | |
826f3a39 | 608 | |
44a053a3 | 609 | debug3("%s: New keys have been sent", __func__); |
826f3a39 | 610 | skip: |
611 | /* More key context */ | |
612 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
613 | p = xmalloc(plen+1); | |
614 | packet_get_keycontext(MODE_OUT, p); | |
615 | buffer_put_string(&m, p, plen); | |
616 | xfree(p); | |
617 | ||
618 | plen = packet_get_keycontext(MODE_IN, NULL); | |
619 | p = xmalloc(plen+1); | |
620 | packet_get_keycontext(MODE_IN, p); | |
621 | buffer_put_string(&m, p, plen); | |
622 | xfree(p); | |
623 | ||
624 | /* Compression state */ | |
44a053a3 | 625 | debug3("%s: Sending compression state", __func__); |
826f3a39 | 626 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
627 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
628 | ||
629 | /* Network I/O buffers */ | |
630 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
631 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
632 | ||
7e82606e | 633 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
44a053a3 | 634 | debug3("%s: Finished sending state", __func__); |
826f3a39 | 635 | |
636 | buffer_free(&m); | |
637 | } | |
638 | ||
639 | int | |
640 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, int namebuflen) | |
641 | { | |
642 | Buffer m; | |
7e82606e | 643 | char *p, *msg; |
826f3a39 | 644 | int success = 0; |
645 | ||
646 | buffer_init(&m); | |
647 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); | |
648 | ||
44a053a3 | 649 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
826f3a39 | 650 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
651 | ||
652 | success = buffer_get_int(&m); | |
653 | if (success == 0) { | |
44a053a3 | 654 | debug3("%s: pty alloc failed", __func__); |
826f3a39 | 655 | buffer_free(&m); |
656 | return (0); | |
657 | } | |
658 | p = buffer_get_string(&m, NULL); | |
7e82606e | 659 | msg = buffer_get_string(&m, NULL); |
826f3a39 | 660 | buffer_free(&m); |
661 | ||
662 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
663 | xfree(p); | |
664 | ||
7e82606e | 665 | buffer_append(&loginmsg, msg, strlen(msg)); |
666 | xfree(msg); | |
667 | ||
826f3a39 | 668 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
669 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
670 | ||
671 | /* Success */ | |
672 | return (1); | |
673 | } | |
674 | ||
675 | void | |
540d72c3 | 676 | mm_session_pty_cleanup2(Session *s) |
826f3a39 | 677 | { |
826f3a39 | 678 | Buffer m; |
679 | ||
680 | if (s->ttyfd == -1) | |
681 | return; | |
682 | buffer_init(&m); | |
683 | buffer_put_cstring(&m, s->tty); | |
684 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); | |
685 | buffer_free(&m); | |
686 | ||
687 | /* closed dup'ed master */ | |
688 | if (close(s->ptymaster) < 0) | |
689 | error("close(s->ptymaster): %s", strerror(errno)); | |
690 | ||
691 | /* unlink pty from session */ | |
692 | s->ttyfd = -1; | |
693 | } | |
694 | ||
695 | #ifdef USE_PAM | |
696 | void | |
12a403af | 697 | mm_start_pam(Authctxt *authctxt) |
826f3a39 | 698 | { |
699 | Buffer m; | |
700 | ||
44a053a3 | 701 | debug3("%s entering", __func__); |
7cac2b65 | 702 | if (!options.use_pam) |
703 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
826f3a39 | 704 | |
705 | buffer_init(&m); | |
826f3a39 | 706 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
707 | ||
708 | buffer_free(&m); | |
709 | } | |
7cac2b65 | 710 | |
711 | u_int | |
712 | mm_do_pam_account(void) | |
713 | { | |
714 | Buffer m; | |
715 | u_int ret; | |
dfddba3d | 716 | char *msg; |
7cac2b65 | 717 | |
718 | debug3("%s entering", __func__); | |
719 | if (!options.use_pam) | |
720 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
721 | ||
722 | buffer_init(&m); | |
723 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
724 | ||
540d72c3 | 725 | mm_request_receive_expect(pmonitor->m_recvfd, |
7cac2b65 | 726 | MONITOR_ANS_PAM_ACCOUNT, &m); |
727 | ret = buffer_get_int(&m); | |
dfddba3d | 728 | msg = buffer_get_string(&m, NULL); |
729 | buffer_append(&loginmsg, msg, strlen(msg)); | |
730 | xfree(msg); | |
7cac2b65 | 731 | |
732 | buffer_free(&m); | |
540d72c3 | 733 | |
7cac2b65 | 734 | debug3("%s returning %d", __func__, ret); |
735 | ||
736 | return (ret); | |
737 | } | |
738 | ||
739 | void * | |
740 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
741 | { | |
742 | Buffer m; | |
743 | int success; | |
744 | ||
745 | debug3("%s", __func__); | |
746 | buffer_init(&m); | |
747 | buffer_put_cstring(&m, authctxt->user); | |
748 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
749 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
750 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
751 | success = buffer_get_int(&m); | |
752 | if (success == 0) { | |
753 | debug3("%s: pam_init_ctx failed", __func__); | |
754 | buffer_free(&m); | |
755 | return (NULL); | |
756 | } | |
757 | buffer_free(&m); | |
758 | return (authctxt); | |
759 | } | |
760 | ||
761 | int | |
762 | mm_sshpam_query(void *ctx, char **name, char **info, | |
763 | u_int *num, char ***prompts, u_int **echo_on) | |
764 | { | |
765 | Buffer m; | |
2ce0bfe4 | 766 | u_int i; |
767 | int ret; | |
7cac2b65 | 768 | |
769 | debug3("%s", __func__); | |
770 | buffer_init(&m); | |
771 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
772 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
773 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
774 | ret = buffer_get_int(&m); | |
775 | debug3("%s: pam_query returned %d", __func__, ret); | |
776 | *name = buffer_get_string(&m, NULL); | |
777 | *info = buffer_get_string(&m, NULL); | |
778 | *num = buffer_get_int(&m); | |
779 | *prompts = xmalloc((*num + 1) * sizeof(char *)); | |
780 | *echo_on = xmalloc((*num + 1) * sizeof(u_int)); | |
781 | for (i = 0; i < *num; ++i) { | |
782 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
783 | (*echo_on)[i] = buffer_get_int(&m); | |
784 | } | |
785 | buffer_free(&m); | |
786 | return (ret); | |
787 | } | |
788 | ||
789 | int | |
790 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
791 | { | |
792 | Buffer m; | |
2ce0bfe4 | 793 | u_int i; |
794 | int ret; | |
7cac2b65 | 795 | |
796 | debug3("%s", __func__); | |
797 | buffer_init(&m); | |
798 | buffer_put_int(&m, num); | |
799 | for (i = 0; i < num; ++i) | |
800 | buffer_put_cstring(&m, resp[i]); | |
801 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
802 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
803 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
804 | ret = buffer_get_int(&m); | |
805 | debug3("%s: pam_respond returned %d", __func__, ret); | |
806 | buffer_free(&m); | |
807 | return (ret); | |
808 | } | |
809 | ||
810 | void | |
811 | mm_sshpam_free_ctx(void *ctxtp) | |
812 | { | |
813 | Buffer m; | |
814 | ||
815 | debug3("%s", __func__); | |
816 | buffer_init(&m); | |
817 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
818 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
819 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
820 | buffer_free(&m); | |
821 | } | |
826f3a39 | 822 | #endif /* USE_PAM */ |
823 | ||
824 | /* Request process termination */ | |
825 | ||
826 | void | |
827 | mm_terminate(void) | |
828 | { | |
829 | Buffer m; | |
830 | ||
831 | buffer_init(&m); | |
832 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); | |
833 | buffer_free(&m); | |
834 | } | |
835 | ||
836 | int | |
837 | mm_ssh1_session_key(BIGNUM *num) | |
838 | { | |
839 | int rsafail; | |
840 | Buffer m; | |
841 | ||
842 | buffer_init(&m); | |
843 | buffer_put_bignum2(&m, num); | |
844 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); | |
845 | ||
846 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); | |
847 | ||
848 | rsafail = buffer_get_int(&m); | |
849 | buffer_get_bignum2(&m, num); | |
850 | ||
851 | buffer_free(&m); | |
852 | ||
853 | return (rsafail); | |
854 | } | |
855 | ||
856 | static void | |
857 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
858 | char ***prompts, u_int **echo_on) | |
859 | { | |
44a053a3 | 860 | *name = xstrdup(""); |
861 | *infotxt = xstrdup(""); | |
826f3a39 | 862 | *numprompts = 1; |
d03f4262 | 863 | *prompts = xmalloc(*numprompts * sizeof(char *)); |
826f3a39 | 864 | *echo_on = xmalloc(*numprompts * sizeof(u_int)); |
865 | (*echo_on)[0] = 0; | |
866 | } | |
867 | ||
868 | int | |
869 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
870 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
871 | { | |
872 | Buffer m; | |
bfe49944 | 873 | u_int success; |
826f3a39 | 874 | char *challenge; |
875 | ||
44a053a3 | 876 | debug3("%s: entering", __func__); |
826f3a39 | 877 | |
878 | buffer_init(&m); | |
879 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); | |
880 | ||
881 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, | |
882 | &m); | |
bfe49944 | 883 | success = buffer_get_int(&m); |
884 | if (success == 0) { | |
44a053a3 | 885 | debug3("%s: no challenge", __func__); |
826f3a39 | 886 | buffer_free(&m); |
887 | return (-1); | |
888 | } | |
889 | ||
890 | /* Get the challenge, and format the response */ | |
891 | challenge = buffer_get_string(&m, NULL); | |
892 | buffer_free(&m); | |
893 | ||
894 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
895 | (*prompts)[0] = challenge; | |
896 | ||
44a053a3 | 897 | debug3("%s: received challenge: %s", __func__, challenge); |
826f3a39 | 898 | |
899 | return (0); | |
900 | } | |
901 | ||
902 | int | |
903 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
904 | { | |
905 | Buffer m; | |
906 | int authok; | |
907 | ||
44a053a3 | 908 | debug3("%s: entering", __func__); |
826f3a39 | 909 | if (numresponses != 1) |
910 | return (-1); | |
911 | ||
912 | buffer_init(&m); | |
913 | buffer_put_cstring(&m, responses[0]); | |
914 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); | |
915 | ||
916 | mm_request_receive_expect(pmonitor->m_recvfd, | |
917 | MONITOR_ANS_BSDAUTHRESPOND, &m); | |
918 | ||
919 | authok = buffer_get_int(&m); | |
920 | buffer_free(&m); | |
921 | ||
922 | return ((authok == 0) ? -1 : 0); | |
923 | } | |
924 | ||
7e82606e | 925 | #ifdef SKEY |
826f3a39 | 926 | int |
927 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
928 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
929 | { | |
930 | Buffer m; | |
bfe49944 | 931 | int len; |
932 | u_int success; | |
826f3a39 | 933 | char *p, *challenge; |
934 | ||
44a053a3 | 935 | debug3("%s: entering", __func__); |
826f3a39 | 936 | |
937 | buffer_init(&m); | |
938 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); | |
939 | ||
940 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, | |
941 | &m); | |
bfe49944 | 942 | success = buffer_get_int(&m); |
943 | if (success == 0) { | |
44a053a3 | 944 | debug3("%s: no challenge", __func__); |
826f3a39 | 945 | buffer_free(&m); |
946 | return (-1); | |
947 | } | |
948 | ||
949 | /* Get the challenge, and format the response */ | |
950 | challenge = buffer_get_string(&m, NULL); | |
951 | buffer_free(&m); | |
952 | ||
44a053a3 | 953 | debug3("%s: received challenge: %s", __func__, challenge); |
826f3a39 | 954 | |
955 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
956 | ||
957 | len = strlen(challenge) + strlen(SKEY_PROMPT) + 1; | |
958 | p = xmalloc(len); | |
959 | strlcpy(p, challenge, len); | |
960 | strlcat(p, SKEY_PROMPT, len); | |
961 | (*prompts)[0] = p; | |
962 | xfree(challenge); | |
963 | ||
964 | return (0); | |
965 | } | |
966 | ||
967 | int | |
968 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
969 | { | |
970 | Buffer m; | |
971 | int authok; | |
972 | ||
44a053a3 | 973 | debug3("%s: entering", __func__); |
826f3a39 | 974 | if (numresponses != 1) |
975 | return (-1); | |
976 | ||
977 | buffer_init(&m); | |
978 | buffer_put_cstring(&m, responses[0]); | |
979 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); | |
980 | ||
981 | mm_request_receive_expect(pmonitor->m_recvfd, | |
982 | MONITOR_ANS_SKEYRESPOND, &m); | |
983 | ||
984 | authok = buffer_get_int(&m); | |
985 | buffer_free(&m); | |
986 | ||
987 | return ((authok == 0) ? -1 : 0); | |
988 | } | |
7e82606e | 989 | #endif /* SKEY */ |
826f3a39 | 990 | |
991 | void | |
992 | mm_ssh1_session_id(u_char session_id[16]) | |
993 | { | |
994 | Buffer m; | |
995 | int i; | |
996 | ||
44a053a3 | 997 | debug3("%s entering", __func__); |
826f3a39 | 998 | |
999 | buffer_init(&m); | |
1000 | for (i = 0; i < 16; i++) | |
1001 | buffer_put_char(&m, session_id[i]); | |
1002 | ||
1003 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); | |
1004 | buffer_free(&m); | |
1005 | } | |
1006 | ||
1007 | int | |
1008 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1009 | { | |
1010 | Buffer m; | |
1011 | Key *key; | |
1012 | u_char *blob; | |
1013 | u_int blen; | |
bfe49944 | 1014 | int allowed = 0, have_forced = 0; |
826f3a39 | 1015 | |
44a053a3 | 1016 | debug3("%s entering", __func__); |
826f3a39 | 1017 | |
1018 | buffer_init(&m); | |
1019 | buffer_put_bignum2(&m, client_n); | |
1020 | ||
1021 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); | |
1022 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1023 | ||
1024 | allowed = buffer_get_int(&m); | |
1025 | ||
bfe49944 | 1026 | /* fake forced command */ |
1027 | auth_clear_options(); | |
1028 | have_forced = buffer_get_int(&m); | |
1029 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1030 | ||
826f3a39 | 1031 | if (allowed && rkey != NULL) { |
1032 | blob = buffer_get_string(&m, &blen); | |
1033 | if ((key = key_from_blob(blob, blen)) == NULL) | |
44a053a3 | 1034 | fatal("%s: key_from_blob failed", __func__); |
826f3a39 | 1035 | *rkey = key; |
1036 | xfree(blob); | |
1037 | } | |
1038 | mm_send_debug(&m); | |
1039 | buffer_free(&m); | |
1040 | ||
1041 | return (allowed); | |
1042 | } | |
1043 | ||
1044 | BIGNUM * | |
1045 | mm_auth_rsa_generate_challenge(Key *key) | |
1046 | { | |
1047 | Buffer m; | |
1048 | BIGNUM *challenge; | |
1049 | u_char *blob; | |
1050 | u_int blen; | |
1051 | ||
44a053a3 | 1052 | debug3("%s entering", __func__); |
826f3a39 | 1053 | |
1054 | if ((challenge = BN_new()) == NULL) | |
44a053a3 | 1055 | fatal("%s: BN_new failed", __func__); |
826f3a39 | 1056 | |
1057 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1058 | if (key_to_blob(key, &blob, &blen) == 0) | |
44a053a3 | 1059 | fatal("%s: key_to_blob failed", __func__); |
826f3a39 | 1060 | key->type = KEY_RSA1; |
1061 | ||
1062 | buffer_init(&m); | |
1063 | buffer_put_string(&m, blob, blen); | |
1064 | xfree(blob); | |
1065 | ||
1066 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); | |
1067 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1068 | ||
1069 | buffer_get_bignum2(&m, challenge); | |
1070 | buffer_free(&m); | |
1071 | ||
1072 | return (challenge); | |
1073 | } | |
1074 | ||
1075 | int | |
1076 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1077 | { | |
1078 | Buffer m; | |
1079 | u_char *blob; | |
1080 | u_int blen; | |
1081 | int success = 0; | |
1082 | ||
44a053a3 | 1083 | debug3("%s entering", __func__); |
826f3a39 | 1084 | |
1085 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1086 | if (key_to_blob(key, &blob, &blen) == 0) | |
44a053a3 | 1087 | fatal("%s: key_to_blob failed", __func__); |
826f3a39 | 1088 | key->type = KEY_RSA1; |
1089 | ||
1090 | buffer_init(&m); | |
1091 | buffer_put_string(&m, blob, blen); | |
1092 | buffer_put_string(&m, response, 16); | |
1093 | xfree(blob); | |
1094 | ||
1095 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); | |
1096 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1097 | ||
1098 | success = buffer_get_int(&m); | |
1099 | buffer_free(&m); | |
1100 | ||
1101 | return (success); | |
1102 | } | |
23987cb8 | 1103 | |
dfddba3d | 1104 | #ifdef SSH_AUDIT_EVENTS |
1105 | void | |
1106 | mm_audit_event(ssh_audit_event_t event) | |
1107 | { | |
1108 | Buffer m; | |
1109 | ||
1110 | debug3("%s entering", __func__); | |
1111 | ||
1112 | buffer_init(&m); | |
1113 | buffer_put_int(&m, event); | |
1114 | ||
1115 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1116 | buffer_free(&m); | |
1117 | } | |
1118 | ||
1119 | void | |
1120 | mm_audit_run_command(const char *command) | |
1121 | { | |
1122 | Buffer m; | |
1123 | ||
1124 | debug3("%s entering command %s", __func__, command); | |
1125 | ||
1126 | buffer_init(&m); | |
1127 | buffer_put_cstring(&m, command); | |
1128 | ||
1129 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1130 | buffer_free(&m); | |
1131 | } | |
1132 | #endif /* SSH_AUDIT_EVENTS */ | |
1133 | ||
7cac2b65 | 1134 | #ifdef GSSAPI |
1135 | OM_uint32 | |
7e82606e | 1136 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
23987cb8 | 1137 | { |
7cac2b65 | 1138 | Buffer m; |
1139 | OM_uint32 major; | |
23987cb8 | 1140 | |
7cac2b65 | 1141 | /* Client doesn't get to see the context */ |
1142 | *ctx = NULL; | |
23987cb8 | 1143 | |
1144 | buffer_init(&m); | |
7e82606e | 1145 | buffer_put_string(&m, goid->elements, goid->length); |
23987cb8 | 1146 | |
7cac2b65 | 1147 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); |
1148 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1149 | ||
1150 | major = buffer_get_int(&m); | |
23987cb8 | 1151 | |
23987cb8 | 1152 | buffer_free(&m); |
7cac2b65 | 1153 | return (major); |
23987cb8 | 1154 | } |
23987cb8 | 1155 | |
7cac2b65 | 1156 | OM_uint32 |
1157 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1158 | gss_buffer_desc *out, OM_uint32 *flags) | |
23987cb8 | 1159 | { |
23987cb8 | 1160 | Buffer m; |
7cac2b65 | 1161 | OM_uint32 major; |
1162 | u_int len; | |
23987cb8 | 1163 | |
1164 | buffer_init(&m); | |
7cac2b65 | 1165 | buffer_put_string(&m, in->value, in->length); |
23987cb8 | 1166 | |
7cac2b65 | 1167 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); |
1168 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
23987cb8 | 1169 | |
7cac2b65 | 1170 | major = buffer_get_int(&m); |
1171 | out->value = buffer_get_string(&m, &len); | |
1172 | out->length = len; | |
1173 | if (flags) | |
1174 | *flags = buffer_get_int(&m); | |
23987cb8 | 1175 | |
1176 | buffer_free(&m); | |
b59afbfe | 1177 | |
7cac2b65 | 1178 | return (major); |
b59afbfe | 1179 | } |
1180 | ||
540d72c3 | 1181 | OM_uint32 |
1182 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1183 | { | |
1184 | Buffer m; | |
1185 | OM_uint32 major; | |
1186 | ||
1187 | buffer_init(&m); | |
1188 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1189 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1190 | ||
1191 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1192 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1193 | &m); | |
1194 | ||
1195 | major = buffer_get_int(&m); | |
1196 | buffer_free(&m); | |
1197 | return(major); | |
1198 | } | |
1199 | ||
7cac2b65 | 1200 | int |
1201 | mm_ssh_gssapi_userok(char *user) | |
1202 | { | |
1203 | Buffer m; | |
1204 | int authenticated = 0; | |
b59afbfe | 1205 | |
7cac2b65 | 1206 | buffer_init(&m); |
b59afbfe | 1207 | |
7cac2b65 | 1208 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); |
1209 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1210 | &m); | |
b59afbfe | 1211 | |
7cac2b65 | 1212 | authenticated = buffer_get_int(&m); |
b59afbfe | 1213 | |
23987cb8 | 1214 | buffer_free(&m); |
7cac2b65 | 1215 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); |
1216 | return (authenticated); | |
b59afbfe | 1217 | } |
1218 | ||
b59afbfe | 1219 | OM_uint32 |
fe4ad273 | 1220 | mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash) |
1221 | { | |
1222 | Buffer m; | |
1223 | OM_uint32 major; | |
77e22b94 | 1224 | u_int len; |
b59afbfe | 1225 | |
fe4ad273 | 1226 | buffer_init(&m); |
1227 | buffer_put_string(&m, data->value, data->length); | |
b59afbfe | 1228 | |
fe4ad273 | 1229 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m); |
1230 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m); | |
23987cb8 | 1231 | |
fe4ad273 | 1232 | major = buffer_get_int(&m); |
1233 | hash->value = buffer_get_string(&m, &len); | |
77e22b94 | 1234 | hash->length = len; |
b59afbfe | 1235 | |
23987cb8 | 1236 | buffer_free(&m); |
fe4ad273 | 1237 | |
1238 | return(major); | |
b59afbfe | 1239 | } |
9eeaa28e | 1240 | |
23987cb8 | 1241 | char * |
1242 | mm_ssh_gssapi_last_error(Gssctxt *ctx, OM_uint32 *major, OM_uint32 *minor) { | |
1243 | Buffer m; | |
1244 | OM_uint32 maj,min; | |
1245 | char *errstr; | |
1246 | ||
1247 | buffer_init(&m); | |
1248 | ||
1249 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSERR, &m); | |
1250 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSERR, &m); | |
1251 | ||
1252 | maj = buffer_get_int(&m); | |
1253 | min = buffer_get_int(&m); | |
1254 | ||
1255 | if (major) *major=maj; | |
1256 | if (minor) *minor=min; | |
1257 | ||
1258 | errstr=buffer_get_string(&m,NULL); | |
1259 | ||
1260 | buffer_free(&m); | |
1261 | ||
1262 | return(errstr); | |
1263 | } | |
e23e524c | 1264 | |
9eeaa28e | 1265 | OM_uint32 |
1266 | mm_gss_indicate_mechs(OM_uint32 *minor_status, gss_OID_set *mech_set) | |
1267 | { | |
1268 | Buffer m; | |
e23e524c | 1269 | OM_uint32 major,minor; |
1270 | int count; | |
1271 | gss_OID_desc oid; | |
d7590ddf | 1272 | u_int length; |
1273 | ||
9eeaa28e | 1274 | buffer_init(&m); |
1275 | ||
1276 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSMECHS, &m); | |
9eeaa28e | 1277 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSMECHS, |
1278 | &m); | |
1279 | major=buffer_get_int(&m); | |
17a7ea48 | 1280 | count=buffer_get_int(&m); |
e23e524c | 1281 | |
1282 | gss_create_empty_oid_set(&minor,mech_set); | |
1283 | while(count-->0) { | |
e23e524c | 1284 | oid.elements=buffer_get_string(&m,&length); |
1285 | oid.length=length; | |
1286 | gss_add_oid_set_member(&minor,&oid,mech_set); | |
9eeaa28e | 1287 | } |
1288 | ||
23987cb8 | 1289 | buffer_free(&m); |
9eeaa28e | 1290 | |
23987cb8 | 1291 | return(major); |
9eeaa28e | 1292 | } |
e23e524c | 1293 | |
1294 | int | |
1295 | mm_ssh_gssapi_localname(char **lname) | |
1296 | { | |
1297 | Buffer m; | |
1298 | ||
1299 | buffer_init(&m); | |
1300 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSLOCALNAME, &m); | |
1301 | ||
1302 | debug3("%s: waiting for MONITOR_ANS_GSSLOCALNAME", __func__); | |
1303 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSLOCALNAME, | |
1304 | &m); | |
1305 | ||
1306 | *lname = buffer_get_string(&m, NULL); | |
1307 | ||
1308 | buffer_free(&m); | |
1309 | if (lname[0] == '\0') { | |
1310 | debug3("%s: gssapi identity mapping failed", __func__); | |
1311 | } else { | |
1312 | debug3("%s: gssapi identity mapped to %s", __func__, *lname); | |
1313 | } | |
1314 | ||
1315 | return(0); | |
1316 | } | |
fe4ad273 | 1317 | |
b59afbfe | 1318 | #endif /* GSSAPI */ |