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2e437378 | 1 | /* $OpenBSD: monitor_wrap.c,v 1.54 2006/08/12 20:46:46 miod Exp $ */ |
2980ea68 | 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" | |
2e437378 | 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> | |
2980ea68 | 40 | |
41 | #include <openssl/bn.h> | |
42 | #include <openssl/dh.h> | |
43 | ||
2e437378 | 44 | #include "xmalloc.h" |
2980ea68 | 45 | #include "ssh.h" |
46 | #include "dh.h" | |
2e437378 | 47 | #include "buffer.h" |
48 | #include "key.h" | |
49 | #include "cipher.h" | |
2980ea68 | 50 | #include "kex.h" |
2e437378 | 51 | #include "hostfile.h" |
2980ea68 | 52 | #include "auth.h" |
1c14df9e | 53 | #include "auth-options.h" |
2980ea68 | 54 | #include "packet.h" |
55 | #include "mac.h" | |
56 | #include "log.h" | |
2a304a95 | 57 | #ifdef TARGET_OS_MAC /* XXX Broken krb5 headers on Mac */ |
58 | #undef TARGET_OS_MAC | |
2980ea68 | 59 | #include "zlib.h" |
2a304a95 | 60 | #define TARGET_OS_MAC 1 |
61 | #else | |
62 | #include "zlib.h" | |
63 | #endif | |
2980ea68 | 64 | #include "monitor.h" |
2e437378 | 65 | #ifdef GSSAPI |
66 | #include "ssh-gss.h" | |
67 | #endif | |
2980ea68 | 68 | #include "monitor_wrap.h" |
2980ea68 | 69 | #include "atomicio.h" |
70 | #include "monitor_fdpass.h" | |
2e437378 | 71 | #include "misc.h" |
70791e56 | 72 | #include "servconf.h" |
2980ea68 | 73 | |
2980ea68 | 74 | #include "channels.h" |
75 | #include "session.h" | |
76 | ||
77 | /* Imports */ | |
78 | extern int compat20; | |
79 | extern Newkeys *newkeys[]; | |
80 | extern z_stream incoming_stream; | |
81 | extern z_stream outgoing_stream; | |
82 | extern struct monitor *pmonitor; | |
83 | extern Buffer input, output; | |
1b56ff3d | 84 | extern Buffer loginmsg; |
70791e56 | 85 | extern ServerOptions options; |
2980ea68 | 86 | |
416fd2a8 | 87 | int |
88 | mm_is_monitor(void) | |
89 | { | |
90 | /* | |
91 | * m_pid is only set in the privileged part, and | |
92 | * points to the unprivileged child. | |
93 | */ | |
94 | return (pmonitor && pmonitor->m_pid > 0); | |
95 | } | |
96 | ||
2980ea68 | 97 | void |
1b56ff3d | 98 | mm_request_send(int sock, enum monitor_reqtype type, Buffer *m) |
2980ea68 | 99 | { |
2980ea68 | 100 | u_int mlen = buffer_len(m); |
e54b3d7c | 101 | u_char buf[5]; |
2980ea68 | 102 | |
ff2d7a98 | 103 | debug3("%s entering: type %d", __func__, type); |
2980ea68 | 104 | |
2e437378 | 105 | put_u32(buf, mlen + 1); |
ff2d7a98 | 106 | buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */ |
1b56ff3d | 107 | if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf)) |
34fee935 | 108 | fatal("%s: write: %s", __func__, strerror(errno)); |
1b56ff3d | 109 | if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen) |
34fee935 | 110 | fatal("%s: write: %s", __func__, strerror(errno)); |
2980ea68 | 111 | } |
112 | ||
113 | void | |
1b56ff3d | 114 | mm_request_receive(int sock, Buffer *m) |
2980ea68 | 115 | { |
116 | u_char buf[4]; | |
2980ea68 | 117 | u_int msg_len; |
118 | ||
ff2d7a98 | 119 | debug3("%s entering", __func__); |
2980ea68 | 120 | |
34fee935 | 121 | if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) { |
122 | if (errno == EPIPE) | |
416fd2a8 | 123 | cleanup_exit(255); |
34fee935 | 124 | fatal("%s: read: %s", __func__, strerror(errno)); |
2980ea68 | 125 | } |
2e437378 | 126 | msg_len = get_u32(buf); |
2980ea68 | 127 | if (msg_len > 256 * 1024) |
ff2d7a98 | 128 | fatal("%s: read: bad msg_len %d", __func__, msg_len); |
2980ea68 | 129 | buffer_clear(m); |
130 | buffer_append_space(m, msg_len); | |
34fee935 | 131 | if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len) |
132 | fatal("%s: read: %s", __func__, strerror(errno)); | |
2980ea68 | 133 | } |
134 | ||
135 | void | |
1b56ff3d | 136 | mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m) |
2980ea68 | 137 | { |
138 | u_char rtype; | |
139 | ||
ff2d7a98 | 140 | debug3("%s entering: type %d", __func__, type); |
2980ea68 | 141 | |
1b56ff3d | 142 | mm_request_receive(sock, m); |
2980ea68 | 143 | rtype = buffer_get_char(m); |
144 | if (rtype != type) | |
ff2d7a98 | 145 | fatal("%s: read: rtype %d != type %d", __func__, |
2980ea68 | 146 | rtype, type); |
147 | } | |
148 | ||
149 | DH * | |
150 | mm_choose_dh(int min, int nbits, int max) | |
151 | { | |
152 | BIGNUM *p, *g; | |
153 | int success = 0; | |
154 | Buffer m; | |
155 | ||
156 | buffer_init(&m); | |
157 | buffer_put_int(&m, min); | |
158 | buffer_put_int(&m, nbits); | |
159 | buffer_put_int(&m, max); | |
160 | ||
161 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m); | |
162 | ||
ff2d7a98 | 163 | debug3("%s: waiting for MONITOR_ANS_MODULI", __func__); |
2980ea68 | 164 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m); |
165 | ||
166 | success = buffer_get_char(&m); | |
167 | if (success == 0) | |
ff2d7a98 | 168 | fatal("%s: MONITOR_ANS_MODULI failed", __func__); |
2980ea68 | 169 | |
170 | if ((p = BN_new()) == NULL) | |
ff2d7a98 | 171 | fatal("%s: BN_new failed", __func__); |
2980ea68 | 172 | if ((g = BN_new()) == NULL) |
ff2d7a98 | 173 | fatal("%s: BN_new failed", __func__); |
2980ea68 | 174 | buffer_get_bignum2(&m, p); |
175 | buffer_get_bignum2(&m, g); | |
176 | ||
ff2d7a98 | 177 | debug3("%s: remaining %d", __func__, buffer_len(&m)); |
2980ea68 | 178 | buffer_free(&m); |
179 | ||
180 | return (dh_new_group(g, p)); | |
181 | } | |
182 | ||
183 | int | |
184 | mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen) | |
185 | { | |
186 | Kex *kex = *pmonitor->m_pkex; | |
187 | Buffer m; | |
188 | ||
ff2d7a98 | 189 | debug3("%s entering", __func__); |
2980ea68 | 190 | |
191 | buffer_init(&m); | |
192 | buffer_put_int(&m, kex->host_key_index(key)); | |
193 | buffer_put_string(&m, data, datalen); | |
194 | ||
195 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m); | |
196 | ||
ff2d7a98 | 197 | debug3("%s: waiting for MONITOR_ANS_SIGN", __func__); |
2980ea68 | 198 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m); |
199 | *sigp = buffer_get_string(&m, lenp); | |
200 | buffer_free(&m); | |
201 | ||
202 | return (0); | |
203 | } | |
204 | ||
205 | struct passwd * | |
1b56ff3d | 206 | mm_getpwnamallow(const char *username) |
2980ea68 | 207 | { |
208 | Buffer m; | |
209 | struct passwd *pw; | |
210 | u_int pwlen; | |
211 | ||
ff2d7a98 | 212 | debug3("%s entering", __func__); |
2980ea68 | 213 | |
214 | buffer_init(&m); | |
1b56ff3d | 215 | buffer_put_cstring(&m, username); |
2980ea68 | 216 | |
217 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m); | |
218 | ||
ff2d7a98 | 219 | debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__); |
2980ea68 | 220 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m); |
221 | ||
222 | if (buffer_get_char(&m) == 0) { | |
223 | buffer_free(&m); | |
224 | return (NULL); | |
225 | } | |
226 | pw = buffer_get_string(&m, &pwlen); | |
227 | if (pwlen != sizeof(struct passwd)) | |
ff2d7a98 | 228 | fatal("%s: struct passwd size mismatch", __func__); |
2980ea68 | 229 | pw->pw_name = buffer_get_string(&m, NULL); |
230 | pw->pw_passwd = buffer_get_string(&m, NULL); | |
231 | pw->pw_gecos = buffer_get_string(&m, NULL); | |
232 | #ifdef HAVE_PW_CLASS_IN_PASSWD | |
233 | pw->pw_class = buffer_get_string(&m, NULL); | |
234 | #endif | |
235 | pw->pw_dir = buffer_get_string(&m, NULL); | |
236 | pw->pw_shell = buffer_get_string(&m, NULL); | |
237 | buffer_free(&m); | |
238 | ||
239 | return (pw); | |
240 | } | |
241 | ||
416fd2a8 | 242 | char * |
243 | mm_auth2_read_banner(void) | |
2980ea68 | 244 | { |
245 | Buffer m; | |
246 | char *banner; | |
247 | ||
ff2d7a98 | 248 | debug3("%s entering", __func__); |
2980ea68 | 249 | |
250 | buffer_init(&m); | |
251 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m); | |
252 | buffer_clear(&m); | |
253 | ||
416fd2a8 | 254 | mm_request_receive_expect(pmonitor->m_recvfd, |
255 | MONITOR_ANS_AUTH2_READ_BANNER, &m); | |
2980ea68 | 256 | banner = buffer_get_string(&m, NULL); |
257 | buffer_free(&m); | |
ff2d7a98 | 258 | |
416fd2a8 | 259 | /* treat empty banner as missing banner */ |
260 | if (strlen(banner) == 0) { | |
261 | xfree(banner); | |
262 | banner = NULL; | |
263 | } | |
2980ea68 | 264 | return (banner); |
265 | } | |
266 | ||
267 | /* Inform the privileged process about service and style */ | |
268 | ||
269 | void | |
270 | mm_inform_authserv(char *service, char *style) | |
271 | { | |
272 | Buffer m; | |
273 | ||
ff2d7a98 | 274 | debug3("%s entering", __func__); |
2980ea68 | 275 | |
276 | buffer_init(&m); | |
277 | buffer_put_cstring(&m, service); | |
278 | buffer_put_cstring(&m, style ? style : ""); | |
279 | ||
280 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m); | |
281 | ||
282 | buffer_free(&m); | |
283 | } | |
284 | ||
285 | /* Do the password authentication */ | |
286 | int | |
287 | mm_auth_password(Authctxt *authctxt, char *password) | |
288 | { | |
289 | Buffer m; | |
290 | int authenticated = 0; | |
291 | ||
ff2d7a98 | 292 | debug3("%s entering", __func__); |
2980ea68 | 293 | |
294 | buffer_init(&m); | |
295 | buffer_put_cstring(&m, password); | |
296 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m); | |
297 | ||
ff2d7a98 | 298 | debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__); |
2980ea68 | 299 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m); |
300 | ||
301 | authenticated = buffer_get_int(&m); | |
302 | ||
303 | buffer_free(&m); | |
304 | ||
305 | debug3("%s: user %sauthenticated", | |
ff2d7a98 | 306 | __func__, authenticated ? "" : "not "); |
2980ea68 | 307 | return (authenticated); |
308 | } | |
309 | ||
310 | int | |
311 | mm_user_key_allowed(struct passwd *pw, Key *key) | |
312 | { | |
313 | return (mm_key_allowed(MM_USERKEY, NULL, NULL, key)); | |
314 | } | |
315 | ||
316 | int | |
317 | mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host, | |
318 | Key *key) | |
319 | { | |
320 | return (mm_key_allowed(MM_HOSTKEY, user, host, key)); | |
321 | } | |
322 | ||
323 | int | |
324 | mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user, | |
325 | char *host, Key *key) | |
326 | { | |
327 | int ret; | |
328 | ||
329 | key->type = KEY_RSA; /* XXX hack for key_to_blob */ | |
330 | ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key); | |
331 | key->type = KEY_RSA1; | |
332 | return (ret); | |
333 | } | |
334 | ||
335 | static void | |
336 | mm_send_debug(Buffer *m) | |
337 | { | |
338 | char *msg; | |
339 | ||
340 | while (buffer_len(m)) { | |
341 | msg = buffer_get_string(m, NULL); | |
ff2d7a98 | 342 | debug3("%s: Sending debug: %s", __func__, msg); |
2980ea68 | 343 | packet_send_debug("%s", msg); |
344 | xfree(msg); | |
345 | } | |
346 | } | |
347 | ||
348 | int | |
349 | mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key) | |
350 | { | |
351 | Buffer m; | |
352 | u_char *blob; | |
353 | u_int len; | |
1c14df9e | 354 | int allowed = 0, have_forced = 0; |
2980ea68 | 355 | |
ff2d7a98 | 356 | debug3("%s entering", __func__); |
2980ea68 | 357 | |
358 | /* Convert the key to a blob and the pass it over */ | |
359 | if (!key_to_blob(key, &blob, &len)) | |
360 | return (0); | |
361 | ||
362 | buffer_init(&m); | |
363 | buffer_put_int(&m, type); | |
364 | buffer_put_cstring(&m, user ? user : ""); | |
365 | buffer_put_cstring(&m, host ? host : ""); | |
366 | buffer_put_string(&m, blob, len); | |
367 | xfree(blob); | |
368 | ||
369 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m); | |
370 | ||
ff2d7a98 | 371 | debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__); |
2980ea68 | 372 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m); |
373 | ||
374 | allowed = buffer_get_int(&m); | |
375 | ||
1c14df9e | 376 | /* fake forced command */ |
377 | auth_clear_options(); | |
378 | have_forced = buffer_get_int(&m); | |
379 | forced_command = have_forced ? xstrdup("true") : NULL; | |
380 | ||
2980ea68 | 381 | /* Send potential debug messages */ |
382 | mm_send_debug(&m); | |
383 | ||
384 | buffer_free(&m); | |
385 | ||
386 | return (allowed); | |
387 | } | |
388 | ||
389 | /* | |
390 | * This key verify needs to send the key type along, because the | |
391 | * privileged parent makes the decision if the key is allowed | |
392 | * for authentication. | |
393 | */ | |
394 | ||
395 | int | |
396 | mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen) | |
397 | { | |
398 | Buffer m; | |
399 | u_char *blob; | |
400 | u_int len; | |
401 | int verified = 0; | |
402 | ||
ff2d7a98 | 403 | debug3("%s entering", __func__); |
2980ea68 | 404 | |
405 | /* Convert the key to a blob and the pass it over */ | |
406 | if (!key_to_blob(key, &blob, &len)) | |
407 | return (0); | |
408 | ||
409 | buffer_init(&m); | |
410 | buffer_put_string(&m, blob, len); | |
411 | buffer_put_string(&m, sig, siglen); | |
412 | buffer_put_string(&m, data, datalen); | |
413 | xfree(blob); | |
414 | ||
415 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m); | |
416 | ||
ff2d7a98 | 417 | debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__); |
2980ea68 | 418 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m); |
419 | ||
420 | verified = buffer_get_int(&m); | |
421 | ||
422 | buffer_free(&m); | |
423 | ||
424 | return (verified); | |
425 | } | |
426 | ||
427 | /* Export key state after authentication */ | |
428 | Newkeys * | |
429 | mm_newkeys_from_blob(u_char *blob, int blen) | |
430 | { | |
431 | Buffer b; | |
432 | u_int len; | |
433 | Newkeys *newkey = NULL; | |
434 | Enc *enc; | |
435 | Mac *mac; | |
436 | Comp *comp; | |
437 | ||
ff2d7a98 | 438 | debug3("%s: %p(%d)", __func__, blob, blen); |
2980ea68 | 439 | #ifdef DEBUG_PK |
440 | dump_base64(stderr, blob, blen); | |
441 | #endif | |
442 | buffer_init(&b); | |
443 | buffer_append(&b, blob, blen); | |
444 | ||
445 | newkey = xmalloc(sizeof(*newkey)); | |
446 | enc = &newkey->enc; | |
447 | mac = &newkey->mac; | |
448 | comp = &newkey->comp; | |
449 | ||
450 | /* Enc structure */ | |
451 | enc->name = buffer_get_string(&b, NULL); | |
452 | buffer_get(&b, &enc->cipher, sizeof(enc->cipher)); | |
453 | enc->enabled = buffer_get_int(&b); | |
454 | enc->block_size = buffer_get_int(&b); | |
455 | enc->key = buffer_get_string(&b, &enc->key_len); | |
456 | enc->iv = buffer_get_string(&b, &len); | |
457 | if (len != enc->block_size) | |
e54b3d7c | 458 | fatal("%s: bad ivlen: expected %u != %u", __func__, |
2980ea68 | 459 | enc->block_size, len); |
460 | ||
461 | if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher) | |
ff2d7a98 | 462 | fatal("%s: bad cipher name %s or pointer %p", __func__, |
2980ea68 | 463 | enc->name, enc->cipher); |
464 | ||
465 | /* Mac structure */ | |
466 | mac->name = buffer_get_string(&b, NULL); | |
467 | if (mac->name == NULL || mac_init(mac, mac->name) == -1) | |
ff2d7a98 | 468 | fatal("%s: can not init mac %s", __func__, mac->name); |
2980ea68 | 469 | mac->enabled = buffer_get_int(&b); |
470 | mac->key = buffer_get_string(&b, &len); | |
471 | if (len > mac->key_len) | |
e54b3d7c | 472 | fatal("%s: bad mac key length: %u > %d", __func__, len, |
2980ea68 | 473 | mac->key_len); |
474 | mac->key_len = len; | |
475 | ||
476 | /* Comp structure */ | |
477 | comp->type = buffer_get_int(&b); | |
478 | comp->enabled = buffer_get_int(&b); | |
479 | comp->name = buffer_get_string(&b, NULL); | |
480 | ||
481 | len = buffer_len(&b); | |
482 | if (len != 0) | |
e54b3d7c | 483 | error("newkeys_from_blob: remaining bytes in blob %u", len); |
2980ea68 | 484 | buffer_free(&b); |
485 | return (newkey); | |
486 | } | |
487 | ||
488 | int | |
489 | mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp) | |
490 | { | |
491 | Buffer b; | |
492 | int len; | |
2980ea68 | 493 | Enc *enc; |
494 | Mac *mac; | |
495 | Comp *comp; | |
496 | Newkeys *newkey = newkeys[mode]; | |
497 | ||
ff2d7a98 | 498 | debug3("%s: converting %p", __func__, newkey); |
2980ea68 | 499 | |
500 | if (newkey == NULL) { | |
ff2d7a98 | 501 | error("%s: newkey == NULL", __func__); |
2980ea68 | 502 | return 0; |
503 | } | |
504 | enc = &newkey->enc; | |
505 | mac = &newkey->mac; | |
506 | comp = &newkey->comp; | |
507 | ||
508 | buffer_init(&b); | |
509 | /* Enc structure */ | |
510 | buffer_put_cstring(&b, enc->name); | |
511 | /* The cipher struct is constant and shared, you export pointer */ | |
512 | buffer_append(&b, &enc->cipher, sizeof(enc->cipher)); | |
513 | buffer_put_int(&b, enc->enabled); | |
514 | buffer_put_int(&b, enc->block_size); | |
515 | buffer_put_string(&b, enc->key, enc->key_len); | |
516 | packet_get_keyiv(mode, enc->iv, enc->block_size); | |
517 | buffer_put_string(&b, enc->iv, enc->block_size); | |
518 | ||
519 | /* Mac structure */ | |
520 | buffer_put_cstring(&b, mac->name); | |
521 | buffer_put_int(&b, mac->enabled); | |
522 | buffer_put_string(&b, mac->key, mac->key_len); | |
523 | ||
524 | /* Comp structure */ | |
525 | buffer_put_int(&b, comp->type); | |
526 | buffer_put_int(&b, comp->enabled); | |
527 | buffer_put_cstring(&b, comp->name); | |
528 | ||
529 | len = buffer_len(&b); | |
2980ea68 | 530 | if (lenp != NULL) |
531 | *lenp = len; | |
e54b3d7c | 532 | if (blobp != NULL) { |
533 | *blobp = xmalloc(len); | |
534 | memcpy(*blobp, buffer_ptr(&b), len); | |
535 | } | |
536 | memset(buffer_ptr(&b), 0, len); | |
537 | buffer_free(&b); | |
2980ea68 | 538 | return len; |
539 | } | |
540 | ||
541 | static void | |
542 | mm_send_kex(Buffer *m, Kex *kex) | |
543 | { | |
544 | buffer_put_string(m, kex->session_id, kex->session_id_len); | |
545 | buffer_put_int(m, kex->we_need); | |
546 | buffer_put_int(m, kex->hostkey_type); | |
547 | buffer_put_int(m, kex->kex_type); | |
548 | buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my)); | |
549 | buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer)); | |
550 | buffer_put_int(m, kex->flags); | |
551 | buffer_put_cstring(m, kex->client_version_string); | |
552 | buffer_put_cstring(m, kex->server_version_string); | |
553 | } | |
554 | ||
555 | void | |
1b56ff3d | 556 | mm_send_keystate(struct monitor *monitor) |
2980ea68 | 557 | { |
558 | Buffer m; | |
559 | u_char *blob, *p; | |
560 | u_int bloblen, plen; | |
70791e56 | 561 | u_int32_t seqnr, packets; |
562 | u_int64_t blocks; | |
2980ea68 | 563 | |
564 | buffer_init(&m); | |
565 | ||
566 | if (!compat20) { | |
567 | u_char iv[24]; | |
ff2d7a98 | 568 | u_char *key; |
569 | u_int ivlen, keylen; | |
2980ea68 | 570 | |
571 | buffer_put_int(&m, packet_get_protocol_flags()); | |
572 | ||
573 | buffer_put_int(&m, packet_get_ssh1_cipher()); | |
574 | ||
ff2d7a98 | 575 | debug3("%s: Sending ssh1 KEY+IV", __func__); |
576 | keylen = packet_get_encryption_key(NULL); | |
577 | key = xmalloc(keylen+1); /* add 1 if keylen == 0 */ | |
578 | keylen = packet_get_encryption_key(key); | |
579 | buffer_put_string(&m, key, keylen); | |
580 | memset(key, 0, keylen); | |
581 | xfree(key); | |
582 | ||
2980ea68 | 583 | ivlen = packet_get_keyiv_len(MODE_OUT); |
584 | packet_get_keyiv(MODE_OUT, iv, ivlen); | |
585 | buffer_put_string(&m, iv, ivlen); | |
586 | ivlen = packet_get_keyiv_len(MODE_OUT); | |
587 | packet_get_keyiv(MODE_IN, iv, ivlen); | |
588 | buffer_put_string(&m, iv, ivlen); | |
589 | goto skip; | |
590 | } else { | |
591 | /* Kex for rekeying */ | |
1b56ff3d | 592 | mm_send_kex(&m, *monitor->m_pkex); |
2980ea68 | 593 | } |
594 | ||
595 | debug3("%s: Sending new keys: %p %p", | |
ff2d7a98 | 596 | __func__, newkeys[MODE_OUT], newkeys[MODE_IN]); |
2980ea68 | 597 | |
598 | /* Keys from Kex */ | |
599 | if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen)) | |
ff2d7a98 | 600 | fatal("%s: conversion of newkeys failed", __func__); |
2980ea68 | 601 | |
602 | buffer_put_string(&m, blob, bloblen); | |
603 | xfree(blob); | |
604 | ||
605 | if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen)) | |
ff2d7a98 | 606 | fatal("%s: conversion of newkeys failed", __func__); |
2980ea68 | 607 | |
608 | buffer_put_string(&m, blob, bloblen); | |
609 | xfree(blob); | |
610 | ||
70791e56 | 611 | packet_get_state(MODE_OUT, &seqnr, &blocks, &packets); |
612 | buffer_put_int(&m, seqnr); | |
613 | buffer_put_int64(&m, blocks); | |
614 | buffer_put_int(&m, packets); | |
615 | packet_get_state(MODE_IN, &seqnr, &blocks, &packets); | |
616 | buffer_put_int(&m, seqnr); | |
617 | buffer_put_int64(&m, blocks); | |
618 | buffer_put_int(&m, packets); | |
2980ea68 | 619 | |
ff2d7a98 | 620 | debug3("%s: New keys have been sent", __func__); |
2980ea68 | 621 | skip: |
622 | /* More key context */ | |
623 | plen = packet_get_keycontext(MODE_OUT, NULL); | |
624 | p = xmalloc(plen+1); | |
625 | packet_get_keycontext(MODE_OUT, p); | |
626 | buffer_put_string(&m, p, plen); | |
627 | xfree(p); | |
628 | ||
629 | plen = packet_get_keycontext(MODE_IN, NULL); | |
630 | p = xmalloc(plen+1); | |
631 | packet_get_keycontext(MODE_IN, p); | |
632 | buffer_put_string(&m, p, plen); | |
633 | xfree(p); | |
634 | ||
635 | /* Compression state */ | |
ff2d7a98 | 636 | debug3("%s: Sending compression state", __func__); |
2980ea68 | 637 | buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream)); |
638 | buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream)); | |
639 | ||
640 | /* Network I/O buffers */ | |
641 | buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input)); | |
642 | buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output)); | |
643 | ||
1b56ff3d | 644 | mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m); |
ff2d7a98 | 645 | debug3("%s: Finished sending state", __func__); |
2980ea68 | 646 | |
647 | buffer_free(&m); | |
648 | } | |
649 | ||
650 | int | |
2e437378 | 651 | mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen) |
2980ea68 | 652 | { |
653 | Buffer m; | |
1b56ff3d | 654 | char *p, *msg; |
2980ea68 | 655 | int success = 0; |
656 | ||
657 | buffer_init(&m); | |
658 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m); | |
659 | ||
ff2d7a98 | 660 | debug3("%s: waiting for MONITOR_ANS_PTY", __func__); |
2980ea68 | 661 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m); |
662 | ||
663 | success = buffer_get_int(&m); | |
664 | if (success == 0) { | |
ff2d7a98 | 665 | debug3("%s: pty alloc failed", __func__); |
2980ea68 | 666 | buffer_free(&m); |
667 | return (0); | |
668 | } | |
669 | p = buffer_get_string(&m, NULL); | |
1b56ff3d | 670 | msg = buffer_get_string(&m, NULL); |
2980ea68 | 671 | buffer_free(&m); |
672 | ||
673 | strlcpy(namebuf, p, namebuflen); /* Possible truncation */ | |
674 | xfree(p); | |
675 | ||
1b56ff3d | 676 | buffer_append(&loginmsg, msg, strlen(msg)); |
677 | xfree(msg); | |
678 | ||
2980ea68 | 679 | *ptyfd = mm_receive_fd(pmonitor->m_recvfd); |
680 | *ttyfd = mm_receive_fd(pmonitor->m_recvfd); | |
681 | ||
682 | /* Success */ | |
683 | return (1); | |
684 | } | |
685 | ||
686 | void | |
416fd2a8 | 687 | mm_session_pty_cleanup2(Session *s) |
2980ea68 | 688 | { |
2980ea68 | 689 | Buffer m; |
690 | ||
691 | if (s->ttyfd == -1) | |
692 | return; | |
693 | buffer_init(&m); | |
694 | buffer_put_cstring(&m, s->tty); | |
695 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m); | |
696 | buffer_free(&m); | |
697 | ||
698 | /* closed dup'ed master */ | |
699 | if (close(s->ptymaster) < 0) | |
700 | error("close(s->ptymaster): %s", strerror(errno)); | |
701 | ||
702 | /* unlink pty from session */ | |
703 | s->ttyfd = -1; | |
704 | } | |
705 | ||
706 | #ifdef USE_PAM | |
707 | void | |
2a304a95 | 708 | mm_start_pam(Authctxt *authctxt) |
2980ea68 | 709 | { |
710 | Buffer m; | |
711 | ||
ff2d7a98 | 712 | debug3("%s entering", __func__); |
70791e56 | 713 | if (!options.use_pam) |
714 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
2980ea68 | 715 | |
716 | buffer_init(&m); | |
2980ea68 | 717 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m); |
718 | ||
719 | buffer_free(&m); | |
720 | } | |
70791e56 | 721 | |
722 | u_int | |
723 | mm_do_pam_account(void) | |
724 | { | |
725 | Buffer m; | |
726 | u_int ret; | |
34fee935 | 727 | char *msg; |
70791e56 | 728 | |
729 | debug3("%s entering", __func__); | |
730 | if (!options.use_pam) | |
731 | fatal("UsePAM=no, but ended up in %s anyway", __func__); | |
732 | ||
733 | buffer_init(&m); | |
734 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m); | |
735 | ||
416fd2a8 | 736 | mm_request_receive_expect(pmonitor->m_recvfd, |
70791e56 | 737 | MONITOR_ANS_PAM_ACCOUNT, &m); |
738 | ret = buffer_get_int(&m); | |
34fee935 | 739 | msg = buffer_get_string(&m, NULL); |
740 | buffer_append(&loginmsg, msg, strlen(msg)); | |
741 | xfree(msg); | |
70791e56 | 742 | |
743 | buffer_free(&m); | |
416fd2a8 | 744 | |
70791e56 | 745 | debug3("%s returning %d", __func__, ret); |
746 | ||
747 | return (ret); | |
748 | } | |
749 | ||
750 | void * | |
751 | mm_sshpam_init_ctx(Authctxt *authctxt) | |
752 | { | |
753 | Buffer m; | |
754 | int success; | |
755 | ||
756 | debug3("%s", __func__); | |
757 | buffer_init(&m); | |
758 | buffer_put_cstring(&m, authctxt->user); | |
759 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m); | |
760 | debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__); | |
761 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m); | |
762 | success = buffer_get_int(&m); | |
763 | if (success == 0) { | |
764 | debug3("%s: pam_init_ctx failed", __func__); | |
765 | buffer_free(&m); | |
766 | return (NULL); | |
767 | } | |
768 | buffer_free(&m); | |
769 | return (authctxt); | |
770 | } | |
771 | ||
772 | int | |
773 | mm_sshpam_query(void *ctx, char **name, char **info, | |
774 | u_int *num, char ***prompts, u_int **echo_on) | |
775 | { | |
776 | Buffer m; | |
34fee935 | 777 | u_int i; |
778 | int ret; | |
70791e56 | 779 | |
780 | debug3("%s", __func__); | |
781 | buffer_init(&m); | |
782 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m); | |
783 | debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__); | |
784 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m); | |
785 | ret = buffer_get_int(&m); | |
786 | debug3("%s: pam_query returned %d", __func__, ret); | |
787 | *name = buffer_get_string(&m, NULL); | |
788 | *info = buffer_get_string(&m, NULL); | |
789 | *num = buffer_get_int(&m); | |
2e437378 | 790 | if (*num > PAM_MAX_NUM_MSG) |
791 | fatal("%s: recieved %u PAM messages, expected <= %u", | |
792 | __func__, *num, PAM_MAX_NUM_MSG); | |
793 | *prompts = xcalloc((*num + 1), sizeof(char *)); | |
794 | *echo_on = xcalloc((*num + 1), sizeof(u_int)); | |
70791e56 | 795 | for (i = 0; i < *num; ++i) { |
796 | (*prompts)[i] = buffer_get_string(&m, NULL); | |
797 | (*echo_on)[i] = buffer_get_int(&m); | |
798 | } | |
799 | buffer_free(&m); | |
800 | return (ret); | |
801 | } | |
802 | ||
803 | int | |
804 | mm_sshpam_respond(void *ctx, u_int num, char **resp) | |
805 | { | |
806 | Buffer m; | |
34fee935 | 807 | u_int i; |
808 | int ret; | |
70791e56 | 809 | |
810 | debug3("%s", __func__); | |
811 | buffer_init(&m); | |
812 | buffer_put_int(&m, num); | |
813 | for (i = 0; i < num; ++i) | |
814 | buffer_put_cstring(&m, resp[i]); | |
815 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m); | |
816 | debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__); | |
817 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m); | |
818 | ret = buffer_get_int(&m); | |
819 | debug3("%s: pam_respond returned %d", __func__, ret); | |
820 | buffer_free(&m); | |
821 | return (ret); | |
822 | } | |
823 | ||
824 | void | |
825 | mm_sshpam_free_ctx(void *ctxtp) | |
826 | { | |
827 | Buffer m; | |
828 | ||
829 | debug3("%s", __func__); | |
830 | buffer_init(&m); | |
831 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m); | |
832 | debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__); | |
833 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m); | |
834 | buffer_free(&m); | |
835 | } | |
2980ea68 | 836 | #endif /* USE_PAM */ |
837 | ||
838 | /* Request process termination */ | |
839 | ||
840 | void | |
841 | mm_terminate(void) | |
842 | { | |
843 | Buffer m; | |
844 | ||
845 | buffer_init(&m); | |
846 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m); | |
847 | buffer_free(&m); | |
848 | } | |
849 | ||
850 | int | |
851 | mm_ssh1_session_key(BIGNUM *num) | |
852 | { | |
853 | int rsafail; | |
854 | Buffer m; | |
855 | ||
856 | buffer_init(&m); | |
857 | buffer_put_bignum2(&m, num); | |
858 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m); | |
859 | ||
860 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m); | |
861 | ||
862 | rsafail = buffer_get_int(&m); | |
863 | buffer_get_bignum2(&m, num); | |
864 | ||
865 | buffer_free(&m); | |
866 | ||
867 | return (rsafail); | |
868 | } | |
869 | ||
870 | static void | |
871 | mm_chall_setup(char **name, char **infotxt, u_int *numprompts, | |
872 | char ***prompts, u_int **echo_on) | |
873 | { | |
ff2d7a98 | 874 | *name = xstrdup(""); |
875 | *infotxt = xstrdup(""); | |
2980ea68 | 876 | *numprompts = 1; |
2e437378 | 877 | *prompts = xcalloc(*numprompts, sizeof(char *)); |
878 | *echo_on = xcalloc(*numprompts, sizeof(u_int)); | |
2980ea68 | 879 | (*echo_on)[0] = 0; |
880 | } | |
881 | ||
882 | int | |
883 | mm_bsdauth_query(void *ctx, char **name, char **infotxt, | |
884 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
885 | { | |
886 | Buffer m; | |
1c14df9e | 887 | u_int success; |
2980ea68 | 888 | char *challenge; |
889 | ||
ff2d7a98 | 890 | debug3("%s: entering", __func__); |
2980ea68 | 891 | |
892 | buffer_init(&m); | |
893 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m); | |
894 | ||
895 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY, | |
896 | &m); | |
1c14df9e | 897 | success = buffer_get_int(&m); |
898 | if (success == 0) { | |
ff2d7a98 | 899 | debug3("%s: no challenge", __func__); |
2980ea68 | 900 | buffer_free(&m); |
901 | return (-1); | |
902 | } | |
903 | ||
904 | /* Get the challenge, and format the response */ | |
905 | challenge = buffer_get_string(&m, NULL); | |
906 | buffer_free(&m); | |
907 | ||
908 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
909 | (*prompts)[0] = challenge; | |
910 | ||
ff2d7a98 | 911 | debug3("%s: received challenge: %s", __func__, challenge); |
2980ea68 | 912 | |
913 | return (0); | |
914 | } | |
915 | ||
916 | int | |
917 | mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses) | |
918 | { | |
919 | Buffer m; | |
920 | int authok; | |
921 | ||
ff2d7a98 | 922 | debug3("%s: entering", __func__); |
2980ea68 | 923 | if (numresponses != 1) |
924 | return (-1); | |
925 | ||
926 | buffer_init(&m); | |
927 | buffer_put_cstring(&m, responses[0]); | |
928 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m); | |
929 | ||
930 | mm_request_receive_expect(pmonitor->m_recvfd, | |
931 | MONITOR_ANS_BSDAUTHRESPOND, &m); | |
932 | ||
933 | authok = buffer_get_int(&m); | |
934 | buffer_free(&m); | |
935 | ||
936 | return ((authok == 0) ? -1 : 0); | |
937 | } | |
938 | ||
1b56ff3d | 939 | #ifdef SKEY |
2980ea68 | 940 | int |
941 | mm_skey_query(void *ctx, char **name, char **infotxt, | |
942 | u_int *numprompts, char ***prompts, u_int **echo_on) | |
943 | { | |
944 | Buffer m; | |
1c14df9e | 945 | u_int success; |
2e437378 | 946 | char *challenge; |
2980ea68 | 947 | |
ff2d7a98 | 948 | debug3("%s: entering", __func__); |
2980ea68 | 949 | |
950 | buffer_init(&m); | |
951 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m); | |
952 | ||
953 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY, | |
954 | &m); | |
1c14df9e | 955 | success = buffer_get_int(&m); |
956 | if (success == 0) { | |
ff2d7a98 | 957 | debug3("%s: no challenge", __func__); |
2980ea68 | 958 | buffer_free(&m); |
959 | return (-1); | |
960 | } | |
961 | ||
962 | /* Get the challenge, and format the response */ | |
963 | challenge = buffer_get_string(&m, NULL); | |
964 | buffer_free(&m); | |
965 | ||
ff2d7a98 | 966 | debug3("%s: received challenge: %s", __func__, challenge); |
2980ea68 | 967 | |
968 | mm_chall_setup(name, infotxt, numprompts, prompts, echo_on); | |
969 | ||
2e437378 | 970 | xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT); |
2980ea68 | 971 | xfree(challenge); |
972 | ||
973 | return (0); | |
974 | } | |
975 | ||
976 | int | |
977 | mm_skey_respond(void *ctx, u_int numresponses, char **responses) | |
978 | { | |
979 | Buffer m; | |
980 | int authok; | |
981 | ||
ff2d7a98 | 982 | debug3("%s: entering", __func__); |
2980ea68 | 983 | if (numresponses != 1) |
984 | return (-1); | |
985 | ||
986 | buffer_init(&m); | |
987 | buffer_put_cstring(&m, responses[0]); | |
988 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m); | |
989 | ||
990 | mm_request_receive_expect(pmonitor->m_recvfd, | |
991 | MONITOR_ANS_SKEYRESPOND, &m); | |
992 | ||
993 | authok = buffer_get_int(&m); | |
994 | buffer_free(&m); | |
995 | ||
996 | return ((authok == 0) ? -1 : 0); | |
997 | } | |
1b56ff3d | 998 | #endif /* SKEY */ |
2980ea68 | 999 | |
1000 | void | |
1001 | mm_ssh1_session_id(u_char session_id[16]) | |
1002 | { | |
1003 | Buffer m; | |
1004 | int i; | |
1005 | ||
ff2d7a98 | 1006 | debug3("%s entering", __func__); |
2980ea68 | 1007 | |
1008 | buffer_init(&m); | |
1009 | for (i = 0; i < 16; i++) | |
1010 | buffer_put_char(&m, session_id[i]); | |
1011 | ||
1012 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m); | |
1013 | buffer_free(&m); | |
1014 | } | |
1015 | ||
1016 | int | |
1017 | mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey) | |
1018 | { | |
1019 | Buffer m; | |
1020 | Key *key; | |
1021 | u_char *blob; | |
1022 | u_int blen; | |
1c14df9e | 1023 | int allowed = 0, have_forced = 0; |
2980ea68 | 1024 | |
ff2d7a98 | 1025 | debug3("%s entering", __func__); |
2980ea68 | 1026 | |
1027 | buffer_init(&m); | |
1028 | buffer_put_bignum2(&m, client_n); | |
1029 | ||
1030 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m); | |
1031 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m); | |
1032 | ||
1033 | allowed = buffer_get_int(&m); | |
1034 | ||
1c14df9e | 1035 | /* fake forced command */ |
1036 | auth_clear_options(); | |
1037 | have_forced = buffer_get_int(&m); | |
1038 | forced_command = have_forced ? xstrdup("true") : NULL; | |
1039 | ||
2980ea68 | 1040 | if (allowed && rkey != NULL) { |
1041 | blob = buffer_get_string(&m, &blen); | |
1042 | if ((key = key_from_blob(blob, blen)) == NULL) | |
ff2d7a98 | 1043 | fatal("%s: key_from_blob failed", __func__); |
2980ea68 | 1044 | *rkey = key; |
1045 | xfree(blob); | |
1046 | } | |
1047 | mm_send_debug(&m); | |
1048 | buffer_free(&m); | |
1049 | ||
1050 | return (allowed); | |
1051 | } | |
1052 | ||
1053 | BIGNUM * | |
1054 | mm_auth_rsa_generate_challenge(Key *key) | |
1055 | { | |
1056 | Buffer m; | |
1057 | BIGNUM *challenge; | |
1058 | u_char *blob; | |
1059 | u_int blen; | |
1060 | ||
ff2d7a98 | 1061 | debug3("%s entering", __func__); |
2980ea68 | 1062 | |
1063 | if ((challenge = BN_new()) == NULL) | |
ff2d7a98 | 1064 | fatal("%s: BN_new failed", __func__); |
2980ea68 | 1065 | |
1066 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1067 | if (key_to_blob(key, &blob, &blen) == 0) | |
ff2d7a98 | 1068 | fatal("%s: key_to_blob failed", __func__); |
2980ea68 | 1069 | key->type = KEY_RSA1; |
1070 | ||
1071 | buffer_init(&m); | |
1072 | buffer_put_string(&m, blob, blen); | |
1073 | xfree(blob); | |
1074 | ||
1075 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m); | |
1076 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m); | |
1077 | ||
1078 | buffer_get_bignum2(&m, challenge); | |
1079 | buffer_free(&m); | |
1080 | ||
1081 | return (challenge); | |
1082 | } | |
1083 | ||
1084 | int | |
1085 | mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16]) | |
1086 | { | |
1087 | Buffer m; | |
1088 | u_char *blob; | |
1089 | u_int blen; | |
1090 | int success = 0; | |
1091 | ||
ff2d7a98 | 1092 | debug3("%s entering", __func__); |
2980ea68 | 1093 | |
1094 | key->type = KEY_RSA; /* XXX cheat for key_to_blob */ | |
1095 | if (key_to_blob(key, &blob, &blen) == 0) | |
ff2d7a98 | 1096 | fatal("%s: key_to_blob failed", __func__); |
2980ea68 | 1097 | key->type = KEY_RSA1; |
1098 | ||
1099 | buffer_init(&m); | |
1100 | buffer_put_string(&m, blob, blen); | |
1101 | buffer_put_string(&m, response, 16); | |
1102 | xfree(blob); | |
1103 | ||
1104 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m); | |
1105 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m); | |
1106 | ||
1107 | success = buffer_get_int(&m); | |
1108 | buffer_free(&m); | |
1109 | ||
1110 | return (success); | |
1111 | } | |
88928908 | 1112 | |
34fee935 | 1113 | #ifdef SSH_AUDIT_EVENTS |
1114 | void | |
1115 | mm_audit_event(ssh_audit_event_t event) | |
1116 | { | |
1117 | Buffer m; | |
1118 | ||
1119 | debug3("%s entering", __func__); | |
1120 | ||
1121 | buffer_init(&m); | |
1122 | buffer_put_int(&m, event); | |
1123 | ||
1124 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m); | |
1125 | buffer_free(&m); | |
1126 | } | |
1127 | ||
1128 | void | |
1129 | mm_audit_run_command(const char *command) | |
1130 | { | |
1131 | Buffer m; | |
1132 | ||
1133 | debug3("%s entering command %s", __func__, command); | |
1134 | ||
1135 | buffer_init(&m); | |
1136 | buffer_put_cstring(&m, command); | |
1137 | ||
1138 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m); | |
1139 | buffer_free(&m); | |
1140 | } | |
1141 | #endif /* SSH_AUDIT_EVENTS */ | |
1142 | ||
70791e56 | 1143 | #ifdef GSSAPI |
1144 | OM_uint32 | |
1b56ff3d | 1145 | mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid) |
88928908 | 1146 | { |
70791e56 | 1147 | Buffer m; |
1148 | OM_uint32 major; | |
88928908 | 1149 | |
70791e56 | 1150 | /* Client doesn't get to see the context */ |
1151 | *ctx = NULL; | |
88928908 | 1152 | |
1153 | buffer_init(&m); | |
1b56ff3d | 1154 | buffer_put_string(&m, goid->elements, goid->length); |
88928908 | 1155 | |
70791e56 | 1156 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m); |
1157 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m); | |
1158 | ||
1159 | major = buffer_get_int(&m); | |
88928908 | 1160 | |
88928908 | 1161 | buffer_free(&m); |
70791e56 | 1162 | return (major); |
88928908 | 1163 | } |
88928908 | 1164 | |
70791e56 | 1165 | OM_uint32 |
1166 | mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in, | |
1167 | gss_buffer_desc *out, OM_uint32 *flags) | |
88928908 | 1168 | { |
88928908 | 1169 | Buffer m; |
70791e56 | 1170 | OM_uint32 major; |
1171 | u_int len; | |
88928908 | 1172 | |
1173 | buffer_init(&m); | |
70791e56 | 1174 | buffer_put_string(&m, in->value, in->length); |
88928908 | 1175 | |
70791e56 | 1176 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m); |
1177 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m); | |
88928908 | 1178 | |
70791e56 | 1179 | major = buffer_get_int(&m); |
1180 | out->value = buffer_get_string(&m, &len); | |
1181 | out->length = len; | |
1182 | if (flags) | |
1183 | *flags = buffer_get_int(&m); | |
88928908 | 1184 | |
1185 | buffer_free(&m); | |
88928908 | 1186 | |
70791e56 | 1187 | return (major); |
ff2d7a98 | 1188 | } |
1189 | ||
416fd2a8 | 1190 | OM_uint32 |
1191 | mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic) | |
1192 | { | |
1193 | Buffer m; | |
1194 | OM_uint32 major; | |
1195 | ||
1196 | buffer_init(&m); | |
1197 | buffer_put_string(&m, gssbuf->value, gssbuf->length); | |
1198 | buffer_put_string(&m, gssmic->value, gssmic->length); | |
1199 | ||
1200 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m); | |
1201 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC, | |
1202 | &m); | |
1203 | ||
1204 | major = buffer_get_int(&m); | |
1205 | buffer_free(&m); | |
1206 | return(major); | |
1207 | } | |
1208 | ||
70791e56 | 1209 | int |
1210 | mm_ssh_gssapi_userok(char *user) | |
1211 | { | |
1212 | Buffer m; | |
1213 | int authenticated = 0; | |
ff2d7a98 | 1214 | |
70791e56 | 1215 | buffer_init(&m); |
ff2d7a98 | 1216 | |
70791e56 | 1217 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m); |
1218 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK, | |
1219 | &m); | |
ff2d7a98 | 1220 | |
70791e56 | 1221 | authenticated = buffer_get_int(&m); |
ff2d7a98 | 1222 | |
88928908 | 1223 | buffer_free(&m); |
70791e56 | 1224 | debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not "); |
1225 | return (authenticated); | |
ff2d7a98 | 1226 | } |
1227 | ||
ff2d7a98 | 1228 | OM_uint32 |
34fee935 | 1229 | mm_ssh_gssapi_sign(Gssctxt *ctx, gss_buffer_desc *data, gss_buffer_desc *hash) |
1230 | { | |
1231 | Buffer m; | |
1232 | OM_uint32 major; | |
2a304a95 | 1233 | u_int len; |
ff2d7a98 | 1234 | |
34fee935 | 1235 | buffer_init(&m); |
1236 | buffer_put_string(&m, data->value, data->length); | |
ff2d7a98 | 1237 | |
34fee935 | 1238 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSIGN, &m); |
1239 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSIGN, &m); | |
88928908 | 1240 | |
34fee935 | 1241 | major = buffer_get_int(&m); |
1242 | hash->value = buffer_get_string(&m, &len); | |
2a304a95 | 1243 | hash->length = len; |
ff2d7a98 | 1244 | |
88928908 | 1245 | buffer_free(&m); |
34fee935 | 1246 | |
1247 | return(major); | |
ff2d7a98 | 1248 | } |
98f19977 | 1249 | |
88928908 | 1250 | char * |
1251 | mm_ssh_gssapi_last_error(Gssctxt *ctx, OM_uint32 *major, OM_uint32 *minor) { | |
1252 | Buffer m; | |
1253 | OM_uint32 maj,min; | |
1254 | char *errstr; | |
1255 | ||
1256 | buffer_init(&m); | |
1257 | ||
1258 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSERR, &m); | |
1259 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSERR, &m); | |
1260 | ||
1261 | maj = buffer_get_int(&m); | |
1262 | min = buffer_get_int(&m); | |
1263 | ||
1264 | if (major) *major=maj; | |
1265 | if (minor) *minor=min; | |
1266 | ||
1267 | errstr=buffer_get_string(&m,NULL); | |
1268 | ||
1269 | buffer_free(&m); | |
1270 | ||
1271 | return(errstr); | |
1272 | } | |
1273 | ||
98f19977 | 1274 | OM_uint32 |
1275 | mm_gss_indicate_mechs(OM_uint32 *minor_status, gss_OID_set *mech_set) | |
1276 | { | |
1277 | Buffer m; | |
88928908 | 1278 | OM_uint32 major,minor; |
1279 | int count; | |
1280 | gss_OID_desc oid; | |
8bb69cbe | 1281 | u_int length; |
1282 | ||
98f19977 | 1283 | buffer_init(&m); |
1284 | ||
1285 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSMECHS, &m); | |
98f19977 | 1286 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSMECHS, |
1287 | &m); | |
1288 | major=buffer_get_int(&m); | |
88928908 | 1289 | count=buffer_get_int(&m); |
1290 | ||
1291 | gss_create_empty_oid_set(&minor,mech_set); | |
1292 | while(count-->0) { | |
88928908 | 1293 | oid.elements=buffer_get_string(&m,&length); |
1294 | oid.length=length; | |
1295 | gss_add_oid_set_member(&minor,&oid,mech_set); | |
98f19977 | 1296 | } |
1297 | ||
88928908 | 1298 | buffer_free(&m); |
1299 | ||
98f19977 | 1300 | return(major); |
1301 | } | |
1302 | ||
88928908 | 1303 | int |
1304 | mm_ssh_gssapi_localname(char **lname) | |
98f19977 | 1305 | { |
1306 | Buffer m; | |
98f19977 | 1307 | |
1308 | buffer_init(&m); | |
88928908 | 1309 | mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSLOCALNAME, &m); |
98f19977 | 1310 | |
88928908 | 1311 | debug3("%s: waiting for MONITOR_ANS_GSSLOCALNAME", __func__); |
1312 | mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSLOCALNAME, | |
1313 | &m); | |
98f19977 | 1314 | |
88928908 | 1315 | *lname = buffer_get_string(&m, NULL); |
98f19977 | 1316 | |
88928908 | 1317 | buffer_free(&m); |
1318 | if (lname[0] == '\0') { | |
1319 | debug3("%s: gssapi identity mapping failed", __func__); | |
98f19977 | 1320 | } else { |
88928908 | 1321 | debug3("%s: gssapi identity mapped to %s", __func__, *lname); |
98f19977 | 1322 | } |
88928908 | 1323 | |
1324 | return(0); | |
1325 | } | |
34fee935 | 1326 | |
ff2d7a98 | 1327 | #endif /* GSSAPI */ |