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fa0f0f45 | 1 | /* $OpenBSD: monitor_wrap.c,v 1.57 2007/06/07 19:37:34 pvalchev Exp $ */ |
826f3a39 | 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" | |
30460aeb | 29 | |
30 | #include <sys/types.h> | |
31 | #include <sys/uio.h> | |
32 | ||
33 | #include <errno.h> | |
34 | #include <pwd.h> | |
35 | #include <signal.h> | |
36 | #include <stdarg.h> | |
37 | #include <stdio.h> | |
38 | #include <string.h> | |
39 | #include <unistd.h> | |
826f3a39 | 40 | |
41 | #include <openssl/bn.h> | |
42 | #include <openssl/dh.h> | |
43 | ||
30460aeb | 44 | #include "xmalloc.h" |
826f3a39 | 45 | #include "ssh.h" |
46 | #include "dh.h" | |
30460aeb | 47 | #include "buffer.h" |
48 | #include "key.h" | |
49 | #include "cipher.h" | |
826f3a39 | 50 | #include "kex.h" |
30460aeb | 51 | #include "hostfile.h" |
826f3a39 | 52 | #include "auth.h" |
bfe49944 | 53 | #include "auth-options.h" |
826f3a39 | 54 | #include "packet.h" |
55 | #include "mac.h" | |
56 | #include "log.h" | |
12a403af | 57 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
58 | #undef TARGET_OS_MAC | |
826f3a39 | 59 | #include "zlib.h" |
12a403af | 60 | #define TARGET_OS_MAC 1 |
61 | #else | |
62 | #include "zlib.h" | |
63 | #endif | |
826f3a39 | 64 | #include "monitor.h" |
30460aeb | 65 | #ifdef GSSAPI |
66 | #include "ssh-gss.h" | |
67 | #endif | |
826f3a39 | 68 | #include "monitor_wrap.h" |
826f3a39 | 69 | #include "atomicio.h" |
70 | #include "monitor_fdpass.h" | |
30460aeb | 71 | #include "misc.h" |
7cac2b65 | 72 | #include "servconf.h" |
826f3a39 | 73 | |
826f3a39 | 74 | #include "channels.h" |
75 | #include "session.h" | |
0b90ac93 | 76 | #include "servconf.h" |
826f3a39 | 77 | |
78 | /* Imports */ | |
79 | extern int compat20; | |
80 | extern Newkeys *newkeys[]; | |
81 | extern z_stream incoming_stream; | |
82 | extern z_stream outgoing_stream; | |
83 | extern struct monitor *pmonitor; | |
84 | extern Buffer input, output; | |
7e82606e | 85 | extern Buffer loginmsg; |
7cac2b65 | 86 | extern ServerOptions options; |
826f3a39 | 87 | |
540d72c3 | 88 | int |
89 | mm_is_monitor(void) | |
90 | { | |
91 | /* | |
92 | * m_pid is only set in the privileged part, and | |
93 | * points to the unprivileged child. | |
94 | */ | |
95 | return (pmonitor && pmonitor->m_pid > 0); | |
96 | } | |
97 | ||
826f3a39 | 98 | void |
7e82606e | 99 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
826f3a39 | 100 | { |
826f3a39 | 101 | u_int mlen = buffer_len(m); |
d03f4262 | 102 | u_char buf[5]; |
826f3a39 | 103 | |
44a053a3 | 104 | debug3("%s entering: type %d", __func__, type); |
826f3a39 | 105 | |
30460aeb | 106 | put_u32(buf, mlen + 1); |
44a053a3 | 107 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
7e82606e | 108 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
2ce0bfe4 | 109 | fatal("%s: write: %s", __func__, strerror(errno)); |
7e82606e | 110 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
2ce0bfe4 | 111 | fatal("%s: write: %s", __func__, strerror(errno)); |
826f3a39 | 112 | } |
113 | ||
114 | void | |
7e82606e | 115 | mm_request_receive(int sock, Buffer *m) |
826f3a39 | 116 | { |
117 | u_char buf[4]; | |
826f3a39 | 118 | u_int msg_len; |
119 | ||
44a053a3 | 120 | debug3("%s entering", __func__); |
826f3a39 | 121 | |
2ce0bfe4 | 122 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
123 | if (errno == EPIPE) | |
540d72c3 | 124 | cleanup_exit(255); |
2ce0bfe4 | 125 | fatal("%s: read: %s", __func__, strerror(errno)); |
826f3a39 | 126 | } |
30460aeb | 127 | msg_len = get_u32(buf); |
826f3a39 | 128 | if (msg_len > 256 * 1024) |
44a053a3 | 129 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
826f3a39 | 130 | buffer_clear(m); |
131 | buffer_append_space(m, msg_len); | |
2ce0bfe4 | 132 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
133 | fatal("%s: read: %s", __func__, strerror(errno)); | |
826f3a39 | 134 | } |
135 | ||
136 | void | |
7e82606e | 137 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
826f3a39 | 138 | { |
139 | u_char rtype; | |
140 | ||
44a053a3 | 141 | debug3("%s entering: type %d", __func__, type); |
826f3a39 | 142 | |
7e82606e | 143 | mm_request_receive(sock, m); |
826f3a39 | 144 | rtype = buffer_get_char(m); |
145 | if (rtype != type) | |
44a053a3 | 146 | fatal("%s: read: rtype %d != type %d", __func__, |
826f3a39 | 147 | rtype, type); |
148 | } | |
149 | ||
150 | DH * | |
151 | mm_choose_dh(int min, int nbits, int max) | |
152 | { | |
153 | BIGNUM *p, *g; | |
154 | int success = 0; | |
155 | Buffer m; | |
156 | ||
157 | buffer_init(&m); | |
158 | buffer_put_int(&m, min); | |
159 | buffer_put_int(&m, nbits); | |
160 | buffer_put_int(&m, max); | |
161 | ||
162 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); | |
163 | ||
44a053a3 | 164 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
826f3a39 | 165 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
166 | ||
167 | success = buffer_get_char(&m); | |
168 | if (success == 0) | |
44a053a3 | 169 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
826f3a39 | 170 | |
171 | if ((p = BN_new()) == NULL) | |
44a053a3 | 172 | fatal("%s: BN_new failed", __func__); |
826f3a39 | 173 | if ((g = BN_new()) == NULL) |
44a053a3 | 174 | fatal("%s: BN_new failed", __func__); |
826f3a39 | 175 | buffer_get_bignum2(&m, p); |
176 | buffer_get_bignum2(&m, g); | |
177 | ||
44a053a3 | 178 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
826f3a39 | 179 | buffer_free(&m); |
180 | ||
181 | return (dh_new_group(g, p)); | |
182 | } | |
183 | ||
184 | int | |
185 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
186 | { | |
187 | Kex *kex = *pmonitor->m_pkex; | |
188 | Buffer m; | |
189 | ||
44a053a3 | 190 | debug3("%s entering", __func__); |
826f3a39 | 191 | |
192 | buffer_init(&m); | |
193 | buffer_put_int(&m, kex->host_key_index(key)); | |
194 | buffer_put_string(&m, data, datalen); | |
195 | ||
196 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); | |
197 | ||
44a053a3 | 198 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
826f3a39 | 199 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
200 | *sigp = buffer_get_string(&m, lenp); | |
201 | buffer_free(&m); | |
202 | ||
203 | return (0); | |
204 | } | |
205 | ||
206 | struct passwd * | |
7e82606e | 207 | mm_getpwnamallow(const char *username) |
826f3a39 | 208 | { |
209 | Buffer m; | |
210 | struct passwd *pw; | |
0b90ac93 | 211 | u_int len; |
212 | ServerOptions *newopts; | |
826f3a39 | 213 | |
44a053a3 | 214 | debug3("%s entering", __func__); |
826f3a39 | 215 | |
216 | buffer_init(&m); | |
7e82606e | 217 | buffer_put_cstring(&m, username); |
826f3a39 | 218 | |
219 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); | |
220 | ||
44a053a3 | 221 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
826f3a39 | 222 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
223 | ||
224 | if (buffer_get_char(&m) == 0) { | |
225 | buffer_free(&m); | |
226 | return (NULL); | |
227 | } | |
0b90ac93 | 228 | pw = buffer_get_string(&m, &len); |
229 | if (len != sizeof(struct passwd)) | |
44a053a3 | 230 | fatal("%s: struct passwd size mismatch", __func__); |
826f3a39 | 231 | pw->pw_name = buffer_get_string(&m, NULL); |
232 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
233 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
234 | #ifdef HAVE_PW_CLASS_IN_PASSWD | |
235 | pw->pw_class = buffer_get_string(&m, NULL); | |
236 | #endif | |
237 | pw->pw_dir = buffer_get_string(&m, NULL); | |
238 | pw->pw_shell = buffer_get_string(&m, NULL); | |
0b90ac93 | 239 | |
240 | /* copy options block as a Match directive may have changed some */ | |
241 | newopts = buffer_get_string(&m, &len); | |
242 | if (len != sizeof(*newopts)) | |
243 | fatal("%s: option block size mismatch", __func__); | |
244 | if (newopts->banner != NULL) | |
245 | newopts->banner = buffer_get_string(&m, NULL); | |
246 | copy_set_server_options(&options, newopts, 1); | |
247 | xfree(newopts); | |
248 | ||
826f3a39 | 249 | buffer_free(&m); |
250 | ||
251 | return (pw); | |
252 | } | |
253 | ||
540d72c3 | 254 | char * |
255 | mm_auth2_read_banner(void) | |
826f3a39 | 256 | { |
257 | Buffer m; | |
258 | char *banner; | |
259 | ||
44a053a3 | 260 | debug3("%s entering", __func__); |
826f3a39 | 261 | |
262 | buffer_init(&m); | |
263 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); | |
264 | buffer_clear(&m); | |
265 | ||
540d72c3 | 266 | mm_request_receive_expect(pmonitor->m_recvfd, |
267 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
826f3a39 | 268 | banner = buffer_get_string(&m, NULL); |
269 | buffer_free(&m); | |
44a053a3 | 270 | |
540d72c3 | 271 | /* treat empty banner as missing banner */ |
272 | if (strlen(banner) == 0) { | |
273 | xfree(banner); | |
274 | banner = NULL; | |
275 | } | |
826f3a39 | 276 | return (banner); |
277 | } | |
278 | ||
279 | /* Inform the privileged process about service and style */ | |
280 | ||
281 | void | |
282 | mm_inform_authserv(char *service, char *style) | |
283 | { | |
284 | Buffer m; | |
285 | ||
44a053a3 | 286 | debug3("%s entering", __func__); |
826f3a39 | 287 | |
288 | buffer_init(&m); | |
289 | buffer_put_cstring(&m, service); | |
290 | buffer_put_cstring(&m, style ? style : ""); | |
291 | ||
292 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); | |
293 | ||
294 | buffer_free(&m); | |
295 | } | |
296 | ||
297 | /* Do the password authentication */ | |
298 | int | |
299 | mm_auth_password(Authctxt *authctxt, char *password) | |
300 | { | |
301 | Buffer m; | |
302 | int authenticated = 0; | |
303 | ||
44a053a3 | 304 | debug3("%s entering", __func__); |
826f3a39 | 305 | |
306 | buffer_init(&m); | |
307 | buffer_put_cstring(&m, password); | |
308 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); | |
309 | ||
44a053a3 | 310 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
826f3a39 | 311 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
312 | ||
313 | authenticated = buffer_get_int(&m); | |
314 | ||
315 | buffer_free(&m); | |
316 | ||
317 | debug3("%s: user %sauthenticated", | |
44a053a3 | 318 | __func__, authenticated ? "" : "not "); |
826f3a39 | 319 | return (authenticated); |
320 | } | |
321 | ||
322 | int | |
323 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
324 | { | |
325 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
326 | } | |
327 | ||
328 | int | |
329 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
330 | Key *key) | |
331 | { | |
332 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
333 | } | |
334 | ||
335 | int | |
336 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
337 | char *host, Key *key) | |
338 | { | |
339 | int ret; | |
340 | ||
341 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
342 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
343 | key->type = KEY_RSA1; | |
344 | return (ret); | |
345 | } | |
346 | ||
347 | static void | |
348 | mm_send_debug(Buffer *m) | |
349 | { | |
350 | char *msg; | |
351 | ||
352 | while (buffer_len(m)) { | |
353 | msg = buffer_get_string(m, NULL); | |
44a053a3 | 354 | debug3("%s: Sending debug: %s", __func__, msg); |
826f3a39 | 355 | packet_send_debug("%s", msg); |
356 | xfree(msg); | |
357 | } | |
358 | } | |
359 | ||
360 | int | |
361 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
362 | { | |
363 | Buffer m; | |
364 | u_char *blob; | |
365 | u_int len; | |
bfe49944 | 366 | int allowed = 0, have_forced = 0; |
826f3a39 | 367 | |
44a053a3 | 368 | debug3("%s entering", __func__); |
826f3a39 | 369 | |
370 | /* Convert the key to a blob and the pass it over */ | |
371 | if (!key_to_blob(key, &blob, &len)) | |
372 | return (0); | |
373 | ||
374 | buffer_init(&m); | |
375 | buffer_put_int(&m, type); | |
376 | buffer_put_cstring(&m, user ? user : ""); | |
377 | buffer_put_cstring(&m, host ? host : ""); | |
378 | buffer_put_string(&m, blob, len); | |
379 | xfree(blob); | |
380 | ||
381 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); | |
382 | ||
44a053a3 | 383 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
826f3a39 | 384 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
385 | ||
386 | allowed = buffer_get_int(&m); | |
387 | ||
bfe49944 | 388 | /* fake forced command */ |
389 | auth_clear_options(); | |
390 | have_forced = buffer_get_int(&m); | |
391 | forced_command = have_forced ? xstrdup("true") : NULL; | |
392 | ||
826f3a39 | 393 | /* Send potential debug messages */ |
394 | mm_send_debug(&m); | |
395 | ||
396 | buffer_free(&m); | |
397 | ||
398 | return (allowed); | |
399 | } | |
400 | ||
401 | /* | |
402 | * This key verify needs to send the key type along, because the | |
403 | * privileged parent makes the decision if the key is allowed | |
404 | * for authentication. | |
405 | */ | |
406 | ||
407 | int | |
408 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
409 | { | |
410 | Buffer m; | |
411 | u_char *blob; | |
412 | u_int len; | |
413 | int verified = 0; | |
414 | ||
44a053a3 | 415 | debug3("%s entering", __func__); |
826f3a39 | 416 | |
417 | /* Convert the key to a blob and the pass it over */ | |
418 | if (!key_to_blob(key, &blob, &len)) | |
419 | return (0); | |
420 | ||
421 | buffer_init(&m); | |
422 | buffer_put_string(&m, blob, len); | |
423 | buffer_put_string(&m, sig, siglen); | |
424 | buffer_put_string(&m, data, datalen); | |
425 | xfree(blob); | |
426 | ||
427 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); | |
428 | ||
44a053a3 | 429 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
826f3a39 | 430 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
431 | ||
432 | verified = buffer_get_int(&m); | |
433 | ||
434 | buffer_free(&m); | |
435 | ||
436 | return (verified); | |
437 | } | |
438 | ||
439 | /* Export key state after authentication */ | |
440 | Newkeys * | |
441 | mm_newkeys_from_blob(u_char *blob, int blen) | |
442 | { | |
443 | Buffer b; | |
444 | u_int len; | |
445 | Newkeys *newkey = NULL; | |
446 | Enc *enc; | |
447 | Mac *mac; | |
448 | Comp *comp; | |
449 | ||
44a053a3 | 450 | debug3("%s: %p(%d)", __func__, blob, blen); |
826f3a39 | 451 | #ifdef DEBUG_PK |
452 | dump_base64(stderr, blob, blen); | |
453 | #endif | |
454 | buffer_init(&b); | |
455 | buffer_append(&b, blob, blen); | |
456 | ||
457 | newkey = xmalloc(sizeof(*newkey)); | |
458 | enc = &newkey->enc; | |
459 | mac = &newkey->mac; | |
460 | comp = &newkey->comp; | |
461 | ||
462 | /* Enc structure */ | |
463 | enc->name = buffer_get_string(&b, NULL); | |
464 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
465 | enc->enabled = buffer_get_int(&b); | |
466 | enc->block_size = buffer_get_int(&b); | |
467 | enc->key = buffer_get_string(&b, &enc->key_len); | |
468 | enc->iv = buffer_get_string(&b, &len); | |
469 | if (len != enc->block_size) | |
d03f4262 | 470 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
826f3a39 | 471 | enc->block_size, len); |
472 | ||
473 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
44a053a3 | 474 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
826f3a39 | 475 | enc->name, enc->cipher); |
476 | ||
477 | /* Mac structure */ | |
478 | mac->name = buffer_get_string(&b, NULL); | |
fa0f0f45 | 479 | if (mac->name == NULL || mac_setup(mac, mac->name) == -1) |
480 | fatal("%s: can not setup mac %s", __func__, mac->name); | |
826f3a39 | 481 | mac->enabled = buffer_get_int(&b); |
482 | mac->key = buffer_get_string(&b, &len); | |
483 | if (len > mac->key_len) | |
d03f4262 | 484 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
826f3a39 | 485 | mac->key_len); |
486 | mac->key_len = len; | |
487 | ||
488 | /* Comp structure */ | |
489 | comp->type = buffer_get_int(&b); | |
490 | comp->enabled = buffer_get_int(&b); | |
491 | comp->name = buffer_get_string(&b, NULL); | |
492 | ||
493 | len = buffer_len(&b); | |
494 | if (len != 0) | |
d03f4262 | 495 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
826f3a39 | 496 | buffer_free(&b); |
497 | return (newkey); | |
498 | } | |
499 | ||
500 | int | |
501 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
502 | { | |
503 | Buffer b; | |
504 | int len; | |
826f3a39 | 505 | Enc *enc; |
506 | Mac *mac; | |
507 | Comp *comp; | |
508 | Newkeys *newkey = newkeys[mode]; | |
509 | ||
44a053a3 | 510 | debug3("%s: converting %p", __func__, newkey); |
826f3a39 | 511 | |
512 | if (newkey == NULL) { | |
44a053a3 | 513 | error("%s: newkey == NULL", __func__); |
826f3a39 | 514 | return 0; |
515 | } | |
516 | enc = &newkey->enc; | |
517 | mac = &newkey->mac; | |
518 | comp = &newkey->comp; | |
519 | ||
520 | buffer_init(&b); | |
521 | /* Enc structure */ | |
522 | buffer_put_cstring(&b, enc->name); | |
523 | /* The cipher struct is constant and shared, you export pointer */ | |
524 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
525 | buffer_put_int(&b, enc->enabled); | |
526 | buffer_put_int(&b, enc->block_size); | |
527 | buffer_put_string(&b, enc->key, enc->key_len); | |
528 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
529 | buffer_put_string(&b, enc->iv, enc->block_size); | |
530 | ||
531 | /* Mac structure */ | |
532 | buffer_put_cstring(&b, mac->name); | |
533 | buffer_put_int(&b, mac->enabled); | |
534 | buffer_put_string(&b, mac->key, mac->key_len); | |
535 | ||
536 | /* Comp structure */ | |
537 | buffer_put_int(&b, comp->type); | |
538 | buffer_put_int(&b, comp->enabled); | |
539 | buffer_put_cstring(&b, comp->name); | |
540 | ||
541 | len = buffer_len(&b); | |
826f3a39 | 542 | if (lenp != NULL) |
543 | *lenp = len; | |
d03f4262 | 544 | if (blobp != NULL) { |
545 | *blobp = xmalloc(len); | |
546 | memcpy(*blobp, buffer_ptr(&b), len); | |
547 | } | |
548 | memset(buffer_ptr(&b), 0, len); | |
549 | buffer_free(&b); | |
826f3a39 | 550 | return len; |
551 | } | |
552 | ||
553 | static void | |
554 | mm_send_kex(Buffer *m, Kex *kex) | |
555 | { | |
556 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
557 | buffer_put_int(m, kex->we_need); | |
558 | buffer_put_int(m, kex->hostkey_type); | |
559 | buffer_put_int(m, kex->kex_type); | |
560 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
561 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
562 | buffer_put_int(m, kex->flags); | |
563 | buffer_put_cstring(m, kex->client_version_string); | |
564 | buffer_put_cstring(m, kex->server_version_string); | |
565 | } | |
566 | ||
567 | void | |
7e82606e | 568 | mm_send_keystate(struct monitor *monitor) |
826f3a39 | 569 | { |
570 | Buffer m; | |
571 | u_char *blob, *p; | |
572 | u_int bloblen, plen; | |
7cac2b65 | 573 | u_int32_t seqnr, packets; |
574 | u_int64_t blocks; | |
826f3a39 | 575 | |
576 | buffer_init(&m); | |
577 | ||
578 | if (!compat20) { | |
579 | u_char iv[24]; | |
44a053a3 | 580 | u_char *key; |
581 | u_int ivlen, keylen; | |
826f3a39 | 582 | |
583 | buffer_put_int(&m, packet_get_protocol_flags()); | |
584 | ||
585 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
586 | ||
44a053a3 | 587 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
588 | keylen = packet_get_encryption_key(NULL); | |
589 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
590 | keylen = packet_get_encryption_key(key); | |
591 | buffer_put_string(&m, key, keylen); | |
592 | memset(key, 0, keylen); | |
593 | xfree(key); | |
594 | ||
826f3a39 | 595 | ivlen = packet_get_keyiv_len(MODE_OUT); |
596 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
597 | buffer_put_string(&m, iv, ivlen); | |
598 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
599 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
600 | buffer_put_string(&m, iv, ivlen); | |
601 | goto skip; | |
602 | } else { | |
603 | /* Kex for rekeying */ | |
7e82606e | 604 | mm_send_kex(&m, *monitor->m_pkex); |
826f3a39 | 605 | } |
606 | ||
607 | debug3("%s: Sending new keys: %p %p", | |
44a053a3 | 608 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
826f3a39 | 609 | |
610 | /* Keys from Kex */ | |
611 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
44a053a3 | 612 | fatal("%s: conversion of newkeys failed", __func__); |
826f3a39 | 613 | |
614 | buffer_put_string(&m, blob, bloblen); | |
615 | xfree(blob); | |
616 | ||
617 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
44a053a3 | 618 | fatal("%s: conversion of newkeys failed", __func__); |
826f3a39 | 619 | |
620 | buffer_put_string(&m, blob, bloblen); | |
621 | xfree(blob); | |
622 | ||
7cac2b65 | 623 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
624 | buffer_put_int(&m, seqnr); | |
625 | buffer_put_int64(&m, blocks); | |
626 | buffer_put_int(&m, packets); | |
627 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); | |
628 | buffer_put_int(&m, seqnr); | |
629 | buffer_put_int64(&m, blocks); | |
630 | buffer_put_int(&m, packets); | |
826f3a39 | 631 | |
44a053a3 | 632 | debug3("%s: New keys have been sent", __func__); |
826f3a39 | 633 | skip: |
634 | /* More key context */ | |
635 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
636 | p = xmalloc(plen+1); | |
637 | packet_get_keycontext(MODE_OUT, p); | |
638 | buffer_put_string(&m, p, plen); | |
639 | xfree(p); | |
640 | ||
641 | plen = packet_get_keycontext(MODE_IN, NULL); | |
642 | p = xmalloc(plen+1); | |
643 | packet_get_keycontext(MODE_IN, p); | |
644 | buffer_put_string(&m, p, plen); | |
645 | xfree(p); | |
646 | ||
647 | /* Compression state */ | |
44a053a3 | 648 | debug3("%s: Sending compression state", __func__); |
826f3a39 | 649 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
650 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
651 | ||
652 | /* Network I/O buffers */ | |
653 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
654 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
655 | ||
7e82606e | 656 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
44a053a3 | 657 | debug3("%s: Finished sending state", __func__); |
826f3a39 | 658 | |
659 | buffer_free(&m); | |
660 | } | |
661 | ||
662 | int | |
30460aeb | 663 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
826f3a39 | 664 | { |
665 | Buffer m; | |
7e82606e | 666 | char *p, *msg; |
826f3a39 | 667 | int success = 0; |
668 | ||
669 | buffer_init(&m); | |
670 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); | |
671 | ||
44a053a3 | 672 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
826f3a39 | 673 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
674 | ||
675 | success = buffer_get_int(&m); | |
676 | if (success == 0) { | |
44a053a3 | 677 | debug3("%s: pty alloc failed", __func__); |
826f3a39 | 678 | buffer_free(&m); |
679 | return (0); | |
680 | } | |
681 | p = buffer_get_string(&m, NULL); | |
7e82606e | 682 | msg = buffer_get_string(&m, NULL); |
826f3a39 | 683 | buffer_free(&m); |
684 | ||
685 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
686 | xfree(p); | |
687 | ||
7e82606e | 688 | buffer_append(&loginmsg, msg, strlen(msg)); |
689 | xfree(msg); | |
690 | ||
826f3a39 | 691 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
692 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
693 | ||
694 | /* Success */ | |
695 | return (1); | |
696 | } | |
697 | ||
698 | void | |
540d72c3 | 699 | mm_session_pty_cleanup2(Session *s) |
826f3a39 | 700 | { |
826f3a39 | 701 | Buffer m; |
702 | ||
703 | if (s->ttyfd == -1) | |
704 | return; | |
705 | buffer_init(&m); | |
706 | buffer_put_cstring(&m, s->tty); | |
707 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); | |
708 | buffer_free(&m); | |
709 | ||
710 | /* closed dup'ed master */ | |
711 | if (close(s->ptymaster) < 0) | |
712 | error("close(s->ptymaster): %s", strerror(errno)); | |
713 | ||
714 | /* unlink pty from session */ | |
715 | s->ttyfd = -1; | |
716 | } | |
717 | ||
718 | #ifdef USE_PAM | |
719 | void | |
12a403af | 720 | mm_start_pam(Authctxt *authctxt) |
826f3a39 | 721 | { |
722 | Buffer m; | |
723 | ||
44a053a3 | 724 | debug3("%s entering", __func__); |
7cac2b65 | 725 | if (!options.use_pam) |
726 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
826f3a39 | 727 | |
728 | buffer_init(&m); | |
826f3a39 | 729 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
730 | ||
731 | buffer_free(&m); | |
732 | } | |
7cac2b65 | 733 | |
734 | u_int | |
735 | mm_do_pam_account(void) | |
736 | { | |
737 | Buffer m; | |
738 | u_int ret; | |
dfddba3d | 739 | char *msg; |
7cac2b65 | 740 | |
741 | debug3("%s entering", __func__); | |
742 | if (!options.use_pam) | |
743 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
744 | ||
745 | buffer_init(&m); | |
746 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
747 | ||
540d72c3 | 748 | mm_request_receive_expect(pmonitor->m_recvfd, |
7cac2b65 | 749 | MONITOR_ANS_PAM_ACCOUNT, &m); |
750 | ret = buffer_get_int(&m); | |
dfddba3d | 751 | msg = buffer_get_string(&m, NULL); |
752 | buffer_append(&loginmsg, msg, strlen(msg)); | |
753 | xfree(msg); | |
7cac2b65 | 754 | |
755 | buffer_free(&m); | |
540d72c3 | 756 | |
7cac2b65 | 757 | debug3("%s returning %d", __func__, ret); |
758 | ||
759 | return (ret); | |
760 | } | |
761 | ||
762 | void * | |
763 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
764 | { | |
765 | Buffer m; | |
766 | int success; | |
767 | ||
768 | debug3("%s", __func__); | |
769 | buffer_init(&m); | |
770 | buffer_put_cstring(&m, authctxt->user); | |
771 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
772 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
773 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
774 | success = buffer_get_int(&m); | |
775 | if (success == 0) { | |
776 | debug3("%s: pam_init_ctx failed", __func__); | |
777 | buffer_free(&m); | |
778 | return (NULL); | |
779 | } | |
780 | buffer_free(&m); | |
781 | return (authctxt); | |
782 | } | |
783 | ||
784 | int | |
785 | mm_sshpam_query(void *ctx, char **name, char **info, | |
786 | u_int *num, char ***prompts, u_int **echo_on) | |
787 | { | |
788 | Buffer m; | |
2ce0bfe4 | 789 | u_int i; |
790 | int ret; | |
7cac2b65 | 791 | |
792 | debug3("%s", __func__); | |
793 | buffer_init(&m); | |
794 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
795 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
796 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
797 | ret = buffer_get_int(&m); | |
798 | debug3("%s: pam_query returned %d", __func__, ret); | |
799 | *name = buffer_get_string(&m, NULL); | |
800 | *info = buffer_get_string(&m, NULL); | |
801 | *num = buffer_get_int(&m); | |
30460aeb | 802 | if (*num > PAM_MAX_NUM_MSG) |
803 | fatal("%s: recieved %u PAM messages, expected <= %u", | |
804 | __func__, *num, PAM_MAX_NUM_MSG); | |
805 | *prompts = xcalloc((*num + 1), sizeof(char *)); | |
806 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); | |
7cac2b65 | 807 | for (i = 0; i < *num; ++i) { |
808 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
809 | (*echo_on)[i] = buffer_get_int(&m); | |
810 | } | |
811 | buffer_free(&m); | |
812 | return (ret); | |
813 | } | |
814 | ||
815 | int | |
816 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
817 | { | |
818 | Buffer m; | |
2ce0bfe4 | 819 | u_int i; |
820 | int ret; | |
7cac2b65 | 821 | |
822 | debug3("%s", __func__); | |
823 | buffer_init(&m); | |
824 | buffer_put_int(&m, num); | |
825 | for (i = 0; i < num; ++i) | |
826 | buffer_put_cstring(&m, resp[i]); | |
827 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
828 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
829 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
830 | ret = buffer_get_int(&m); | |
831 | debug3("%s: pam_respond returned %d", __func__, ret); | |
832 | buffer_free(&m); | |
833 | return (ret); | |
834 | } | |
835 | ||
836 | void | |
837 | mm_sshpam_free_ctx(void *ctxtp) | |
838 | { | |
839 | Buffer m; | |
840 | ||
841 | debug3("%s", __func__); | |
842 | buffer_init(&m); | |
843 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
844 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
845 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
846 | buffer_free(&m); | |
847 | } | |
826f3a39 | 848 | #endif /* USE_PAM */ |
849 | ||
850 | /* Request process termination */ | |
851 | ||
852 | void | |
853 | mm_terminate(void) | |
854 | { | |
855 | Buffer m; | |
856 | ||
857 | buffer_init(&m); | |
858 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); | |
859 | buffer_free(&m); | |
860 | } | |
861 | ||
862 | int | |
863 | mm_ssh1_session_key(BIGNUM *num) | |
864 | { | |
865 | int rsafail; | |
866 | Buffer m; | |
867 | ||
868 | buffer_init(&m); | |
869 | buffer_put_bignum2(&m, num); | |
870 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); | |
871 | ||
872 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); | |
873 | ||
874 | rsafail = buffer_get_int(&m); | |
875 | buffer_get_bignum2(&m, num); | |
876 | ||
877 | buffer_free(&m); | |
878 | ||
879 | return (rsafail); | |
880 | } | |
881 | ||
882 | static void | |
883 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
884 | char ***prompts, u_int **echo_on) | |
885 | { | |
44a053a3 | 886 | *name = xstrdup(""); |
887 | *infotxt = xstrdup(""); | |
826f3a39 | 888 | *numprompts = 1; |
30460aeb | 889 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
890 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
826f3a39 | 891 | (*echo_on)[0] = 0; |
892 | } | |
893 | ||
894 | int | |
895 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
896 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
897 | { | |
898 | Buffer m; | |
bfe49944 | 899 | u_int success; |
826f3a39 | 900 | char *challenge; |
901 | ||
44a053a3 | 902 | debug3("%s: entering", __func__); |
826f3a39 | 903 | |
904 | buffer_init(&m); | |
905 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); | |
906 | ||
907 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, | |
908 | &m); | |
bfe49944 | 909 | success = buffer_get_int(&m); |
910 | if (success == 0) { | |
44a053a3 | 911 | debug3("%s: no challenge", __func__); |
826f3a39 | 912 | buffer_free(&m); |
913 | return (-1); | |
914 | } | |
915 | ||
916 | /* Get the challenge, and format the response */ | |
917 | challenge = buffer_get_string(&m, NULL); | |
918 | buffer_free(&m); | |
919 | ||
920 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
921 | (*prompts)[0] = challenge; | |
922 | ||
44a053a3 | 923 | debug3("%s: received challenge: %s", __func__, challenge); |
826f3a39 | 924 | |
925 | return (0); | |
926 | } | |
927 | ||
928 | int | |
929 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
930 | { | |
931 | Buffer m; | |
932 | int authok; | |
933 | ||
44a053a3 | 934 | debug3("%s: entering", __func__); |
826f3a39 | 935 | if (numresponses != 1) |
936 | return (-1); | |
937 | ||
938 | buffer_init(&m); | |
939 | buffer_put_cstring(&m, responses[0]); | |
940 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); | |
941 | ||
942 | mm_request_receive_expect(pmonitor->m_recvfd, | |
943 | MONITOR_ANS_BSDAUTHRESPOND, &m); | |
944 | ||
945 | authok = buffer_get_int(&m); | |
946 | buffer_free(&m); | |
947 | ||
948 | return ((authok == 0) ? -1 : 0); | |
949 | } | |
950 | ||
7e82606e | 951 | #ifdef SKEY |
826f3a39 | 952 | int |
953 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
954 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
955 | { | |
956 | Buffer m; | |
bfe49944 | 957 | u_int success; |
30460aeb | 958 | char *challenge; |
826f3a39 | 959 | |
44a053a3 | 960 | debug3("%s: entering", __func__); |
826f3a39 | 961 | |
962 | buffer_init(&m); | |
963 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); | |
964 | ||
965 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, | |
966 | &m); | |
bfe49944 | 967 | success = buffer_get_int(&m); |
968 | if (success == 0) { | |
44a053a3 | 969 | debug3("%s: no challenge", __func__); |
826f3a39 | 970 | buffer_free(&m); |
971 | return (-1); | |
972 | } | |
973 | ||
974 | /* Get the challenge, and format the response */ | |
975 | challenge = buffer_get_string(&m, NULL); | |
976 | buffer_free(&m); | |
977 | ||
44a053a3 | 978 | debug3("%s: received challenge: %s", __func__, challenge); |
826f3a39 | 979 | |
980 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
981 | ||
30460aeb | 982 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
826f3a39 | 983 | xfree(challenge); |
984 | ||
985 | return (0); | |
986 | } | |
987 | ||
988 | int | |
989 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
990 | { | |
991 | Buffer m; | |
992 | int authok; | |
993 | ||
44a053a3 | 994 | debug3("%s: entering", __func__); |
826f3a39 | 995 | if (numresponses != 1) |
996 | return (-1); | |
997 | ||
998 | buffer_init(&m); | |
999 | buffer_put_cstring(&m, responses[0]); | |
1000 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); | |
1001 | ||
1002 | mm_request_receive_expect(pmonitor->m_recvfd, | |
1003 | MONITOR_ANS_SKEYRESPOND, &m); | |
1004 | ||
1005 | authok = buffer_get_int(&m); | |
1006 | buffer_free(&m); | |
1007 | ||
1008 | return ((authok == 0) ? -1 : 0); | |
1009 | } | |
7e82606e | 1010 | #endif /* SKEY */ |
826f3a39 | 1011 | |
1012 | void | |
1013 | mm_ssh1_session_id(u_char session_id[16]) | |
1014 | { | |
1015 | Buffer m; | |
1016 | int i; | |
1017 | ||
44a053a3 | 1018 | debug3("%s entering", __func__); |
826f3a39 | 1019 | |
1020 | buffer_init(&m); | |
1021 | for (i = 0; i < 16; i++) | |
1022 | buffer_put_char(&m, session_id[i]); | |
1023 | ||
1024 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); | |
1025 | buffer_free(&m); | |
1026 | } | |
1027 | ||
1028 | int | |
1029 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1030 | { | |
1031 | Buffer m; | |
1032 | Key *key; | |
1033 | u_char *blob; | |
1034 | u_int blen; | |
bfe49944 | 1035 | int allowed = 0, have_forced = 0; |
826f3a39 | 1036 | |
44a053a3 | 1037 | debug3("%s entering", __func__); |
826f3a39 | 1038 | |
1039 | buffer_init(&m); | |
1040 | buffer_put_bignum2(&m, client_n); | |
1041 | ||
1042 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); | |
1043 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1044 | ||
1045 | allowed = buffer_get_int(&m); | |
1046 | ||
bfe49944 | 1047 | /* fake forced command */ |
1048 | auth_clear_options(); | |
1049 | have_forced = buffer_get_int(&m); | |
1050 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1051 | ||
826f3a39 | 1052 | if (allowed && rkey != NULL) { |
1053 | blob = buffer_get_string(&m, &blen); | |
1054 | if ((key = key_from_blob(blob, blen)) == NULL) | |
44a053a3 | 1055 | fatal("%s: key_from_blob failed", __func__); |
826f3a39 | 1056 | *rkey = key; |
1057 | xfree(blob); | |
1058 | } | |
1059 | mm_send_debug(&m); | |
1060 | buffer_free(&m); | |
1061 | ||
1062 | return (allowed); | |
1063 | } | |
1064 | ||
1065 | BIGNUM * | |
1066 | mm_auth_rsa_generate_challenge(Key *key) | |
1067 | { | |
1068 | Buffer m; | |
1069 | BIGNUM *challenge; | |
1070 | u_char *blob; | |
1071 | u_int blen; | |
1072 | ||
44a053a3 | 1073 | debug3("%s entering", __func__); |
826f3a39 | 1074 | |
1075 | if ((challenge = BN_new()) == NULL) | |
44a053a3 | 1076 | fatal("%s: BN_new failed", __func__); |
826f3a39 | 1077 | |
1078 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1079 | if (key_to_blob(key, &blob, &blen) == 0) | |
44a053a3 | 1080 | fatal("%s: key_to_blob failed", __func__); |
826f3a39 | 1081 | key->type = KEY_RSA1; |
1082 | ||
1083 | buffer_init(&m); | |
1084 | buffer_put_string(&m, blob, blen); | |
1085 | xfree(blob); | |
1086 | ||
1087 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); | |
1088 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1089 | ||
1090 | buffer_get_bignum2(&m, challenge); | |
1091 | buffer_free(&m); | |
1092 | ||
1093 | return (challenge); | |
1094 | } | |
1095 | ||
1096 | int | |
1097 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1098 | { | |
1099 | Buffer m; | |
1100 | u_char *blob; | |
1101 | u_int blen; | |
1102 | int success = 0; | |
1103 | ||
44a053a3 | 1104 | debug3("%s entering", __func__); |
826f3a39 | 1105 | |
1106 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1107 | if (key_to_blob(key, &blob, &blen) == 0) | |
44a053a3 | 1108 | fatal("%s: key_to_blob failed", __func__); |
826f3a39 | 1109 | key->type = KEY_RSA1; |
1110 | ||
1111 | buffer_init(&m); | |
1112 | buffer_put_string(&m, blob, blen); | |
1113 | buffer_put_string(&m, response, 16); | |
1114 | xfree(blob); | |
1115 | ||
1116 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); | |
1117 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1118 | ||
1119 | success = buffer_get_int(&m); | |
1120 | buffer_free(&m); | |
1121 | ||
1122 | return (success); | |
1123 | } | |
23987cb8 | 1124 | |
dfddba3d | 1125 | #ifdef SSH_AUDIT_EVENTS |
1126 | void | |
1127 | mm_audit_event(ssh_audit_event_t event) | |
1128 | { | |
1129 | Buffer m; | |
1130 | ||
1131 | debug3("%s entering", __func__); | |
1132 | ||
1133 | buffer_init(&m); | |
1134 | buffer_put_int(&m, event); | |
1135 | ||
1136 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1137 | buffer_free(&m); | |
1138 | } | |
1139 | ||
1140 | void | |
1141 | mm_audit_run_command(const char *command) | |
1142 | { | |
1143 | Buffer m; | |
1144 | ||
1145 | debug3("%s entering command %s", __func__, command); | |
1146 | ||
1147 | buffer_init(&m); | |
1148 | buffer_put_cstring(&m, command); | |
1149 | ||
1150 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1151 | buffer_free(&m); | |
1152 | } | |
1153 | #endif /* SSH_AUDIT_EVENTS */ | |
1154 | ||
7cac2b65 | 1155 | #ifdef GSSAPI |
1156 | OM_uint32 | |
7e82606e | 1157 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
23987cb8 | 1158 | { |
7cac2b65 | 1159 | Buffer m; |
1160 | OM_uint32 major; | |
23987cb8 | 1161 | |
7cac2b65 | 1162 | /* Client doesn't get to see the context */ |
1163 | *ctx = NULL; | |
23987cb8 | 1164 | |
1165 | buffer_init(&m); | |
7e82606e | 1166 | buffer_put_string(&m, goid->elements, goid->length); |
23987cb8 | 1167 | |
7cac2b65 | 1168 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); |
1169 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1170 | ||
1171 | major = buffer_get_int(&m); | |
23987cb8 | 1172 | |
23987cb8 | 1173 | buffer_free(&m); |
7cac2b65 | 1174 | return (major); |
23987cb8 | 1175 | } |
23987cb8 | 1176 | |
7cac2b65 | 1177 | OM_uint32 |
1178 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1179 | gss_buffer_desc *out, OM_uint32 *flags) | |
23987cb8 | 1180 | { |
23987cb8 | 1181 | Buffer m; |
7cac2b65 | 1182 | OM_uint32 major; |
1183 | u_int len; | |
23987cb8 | 1184 | |
1185 | buffer_init(&m); | |
7cac2b65 | 1186 | buffer_put_string(&m, in->value, in->length); |
23987cb8 | 1187 | |
7cac2b65 | 1188 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); |
1189 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
23987cb8 | 1190 | |
7cac2b65 | 1191 | major = buffer_get_int(&m); |
1192 | out->value = buffer_get_string(&m, &len); | |
1193 | out->length = len; | |
1194 | if (flags) | |
1195 | *flags = buffer_get_int(&m); | |
23987cb8 | 1196 | |
1197 | buffer_free(&m); | |
b59afbfe | 1198 | |
7cac2b65 | 1199 | return (major); |
b59afbfe | 1200 | } |
1201 | ||
540d72c3 | 1202 | OM_uint32 |
1203 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1204 | { | |
1205 | Buffer m; | |
1206 | OM_uint32 major; | |
1207 | ||
1208 | buffer_init(&m); | |
1209 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1210 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1211 | ||
1212 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1213 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1214 | &m); | |
1215 | ||
1216 | major = buffer_get_int(&m); | |
1217 | buffer_free(&m); | |
1218 | return(major); | |
1219 | } | |
1220 | ||
7cac2b65 | 1221 | int |
1222 | mm_ssh_gssapi_userok(char *user) | |
1223 | { | |
1224 | Buffer m; | |
1225 | int authenticated = 0; | |
b59afbfe | 1226 | |
7cac2b65 | 1227 | buffer_init(&m); |
b59afbfe | 1228 | |
7cac2b65 | 1229 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); |
1230 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1231 | &m); | |
b59afbfe | 1232 | |
7cac2b65 | 1233 | authenticated = buffer_get_int(&m); |
b59afbfe | 1234 | |
23987cb8 | 1235 | buffer_free(&m); |
7cac2b65 | 1236 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); |
1237 | return (authenticated); | |
b59afbfe | 1238 | } |
1239 | ||
b59afbfe | 1240 | OM_uint32 |
fe4ad273 | 1241 | mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash) |
1242 | { | |
1243 | Buffer m; | |
1244 | OM_uint32 major; | |
77e22b94 | 1245 | u_int len; |
b59afbfe | 1246 | |
fe4ad273 | 1247 | buffer_init(&m); |
1248 | buffer_put_string(&m, data->value, data->length); | |
b59afbfe | 1249 | |
fe4ad273 | 1250 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m); |
1251 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m); | |
23987cb8 | 1252 | |
fe4ad273 | 1253 | major = buffer_get_int(&m); |
1254 | hash->value = buffer_get_string(&m, &len); | |
77e22b94 | 1255 | hash->length = len; |
b59afbfe | 1256 | |
23987cb8 | 1257 | buffer_free(&m); |
fe4ad273 | 1258 | |
1259 | return(major); | |
b59afbfe | 1260 | } |
9eeaa28e | 1261 | |
23987cb8 | 1262 | char * |
1263 | mm_ssh_gssapi_last_error(Gssctxt *ctx, OM_uint32 *major, OM_uint32 *minor) { | |
1264 | Buffer m; | |
1265 | OM_uint32 maj,min; | |
1266 | char *errstr; | |
1267 | ||
1268 | buffer_init(&m); | |
1269 | ||
1270 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSERR, &m); | |
1271 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSERR, &m); | |
1272 | ||
1273 | maj = buffer_get_int(&m); | |
1274 | min = buffer_get_int(&m); | |
1275 | ||
1276 | if (major) *major=maj; | |
1277 | if (minor) *minor=min; | |
1278 | ||
1279 | errstr=buffer_get_string(&m,NULL); | |
1280 | ||
1281 | buffer_free(&m); | |
1282 | ||
1283 | return(errstr); | |
1284 | } | |
e23e524c | 1285 | |
9eeaa28e | 1286 | OM_uint32 |
1287 | mm_gss_indicate_mechs(OM_uint32 *minor_status, gss_OID_set *mech_set) | |
1288 | { | |
1289 | Buffer m; | |
e23e524c | 1290 | OM_uint32 major,minor; |
1291 | int count; | |
1292 | gss_OID_desc oid; | |
d7590ddf | 1293 | u_int length; |
1294 | ||
9eeaa28e | 1295 | buffer_init(&m); |
1296 | ||
1297 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSMECHS, &m); | |
9eeaa28e | 1298 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSMECHS, |
1299 | &m); | |
1300 | major=buffer_get_int(&m); | |
17a7ea48 | 1301 | count=buffer_get_int(&m); |
e23e524c | 1302 | |
1303 | gss_create_empty_oid_set(&minor,mech_set); | |
1304 | while(count-->0) { | |
e23e524c | 1305 | oid.elements=buffer_get_string(&m,&length); |
1306 | oid.length=length; | |
1307 | gss_add_oid_set_member(&minor,&oid,mech_set); | |
9eeaa28e | 1308 | } |
1309 | ||
23987cb8 | 1310 | buffer_free(&m); |
9eeaa28e | 1311 | |
23987cb8 | 1312 | return(major); |
9eeaa28e | 1313 | } |
e23e524c | 1314 | |
1315 | int | |
1316 | mm_ssh_gssapi_localname(char **lname) | |
1317 | { | |
1318 | Buffer m; | |
1319 | ||
1320 | buffer_init(&m); | |
1321 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSLOCALNAME, &m); | |
1322 | ||
1323 | debug3("%s: waiting for MONITOR_ANS_GSSLOCALNAME", __func__); | |
1324 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSLOCALNAME, | |
1325 | &m); | |
1326 | ||
1327 | *lname = buffer_get_string(&m, NULL); | |
1328 | ||
1329 | buffer_free(&m); | |
1330 | if (lname[0] == '\0') { | |
1331 | debug3("%s: gssapi identity mapping failed", __func__); | |
1332 | } else { | |
1333 | debug3("%s: gssapi identity mapped to %s", __func__, *lname); | |
1334 | } | |
1335 | ||
1336 | return(0); | |
1337 | } | |
fe4ad273 | 1338 | |
b59afbfe | 1339 | #endif /* GSSAPI */ |