Annotation of src/usr.bin/ssh/monitor_wrap.c, Revision 1.76
1.76 ! djm 1: /* $OpenBSD: monitor_wrap.c,v 1.75 2013/01/08 18:49:04 markus Exp $ */
1.1 provos 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:
1.46 stevesk 28: #include <sys/types.h>
1.51 dtucker 29: #include <sys/uio.h>
1.61 djm 30: #include <sys/queue.h>
1.46 stevesk 31:
1.47 stevesk 32: #include <errno.h>
1.46 stevesk 33: #include <pwd.h>
1.50 deraadt 34: #include <signal.h>
1.49 stevesk 35: #include <stdio.h>
1.48 stevesk 36: #include <string.h>
1.51 dtucker 37: #include <unistd.h>
1.68 dtucker 38:
39: #include <openssl/bn.h>
40: #include <openssl/dh.h>
41: #include <openssl/evp.h>
1.1 provos 42:
1.50 deraadt 43: #include "xmalloc.h"
1.1 provos 44: #include "ssh.h"
45: #include "dh.h"
1.50 deraadt 46: #include "buffer.h"
47: #include "key.h"
48: #include "cipher.h"
1.1 provos 49: #include "kex.h"
1.50 deraadt 50: #include "hostfile.h"
1.1 provos 51: #include "auth.h"
1.22 markus 52: #include "auth-options.h"
1.1 provos 53: #include "packet.h"
54: #include "mac.h"
55: #include "log.h"
1.54 miod 56: #include <zlib.h>
1.1 provos 57: #include "monitor.h"
1.50 deraadt 58: #ifdef GSSAPI
59: #include "ssh-gss.h"
60: #endif
1.1 provos 61: #include "monitor_wrap.h"
62: #include "atomicio.h"
63: #include "monitor_fdpass.h"
1.45 djm 64: #include "misc.h"
1.65 djm 65: #include "schnorr.h"
1.64 djm 66: #include "jpake.h"
1.70 djm 67: #include "uuencode.h"
1.1 provos 68:
69: #include "channels.h"
70: #include "session.h"
1.55 dtucker 71: #include "servconf.h"
1.67 andreas 72: #include "roaming.h"
1.29 markus 73:
1.1 provos 74: /* Imports */
75: extern int compat20;
76: extern z_stream incoming_stream;
77: extern z_stream outgoing_stream;
1.7 mouring 78: extern struct monitor *pmonitor;
1.39 dtucker 79: extern Buffer loginmsg;
1.55 dtucker 80: extern ServerOptions options;
1.73 djm 81:
82: void
83: mm_log_handler(LogLevel level, const char *msg, void *ctx)
84: {
85: Buffer log_msg;
86: struct monitor *mon = (struct monitor *)ctx;
87:
88: if (mon->m_log_sendfd == -1)
89: fatal("%s: no log channel", __func__);
90:
91: buffer_init(&log_msg);
92: /*
93: * Placeholder for packet length. Will be filled in with the actual
94: * packet length once the packet has been constucted. This saves
95: * fragile math.
96: */
97: buffer_put_int(&log_msg, 0);
98:
99: buffer_put_int(&log_msg, level);
100: buffer_put_cstring(&log_msg, msg);
101: put_u32(buffer_ptr(&log_msg), buffer_len(&log_msg) - 4);
102: if (atomicio(vwrite, mon->m_log_sendfd, buffer_ptr(&log_msg),
103: buffer_len(&log_msg)) != buffer_len(&log_msg))
104: fatal("%s: write: %s", __func__, strerror(errno));
105: buffer_free(&log_msg);
106: }
1.1 provos 107:
1.32 markus 108: int
109: mm_is_monitor(void)
110: {
111: /*
112: * m_pid is only set in the privileged part, and
113: * points to the unprivileged child.
114: */
1.34 markus 115: return (pmonitor && pmonitor->m_pid > 0);
1.32 markus 116: }
117:
1.1 provos 118: void
1.36 avsm 119: mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
1.1 provos 120: {
1.13 deraadt 121: u_int mlen = buffer_len(m);
1.1 provos 122: u_char buf[5];
123:
1.8 markus 124: debug3("%s entering: type %d", __func__, type);
1.1 provos 125:
1.45 djm 126: put_u32(buf, mlen + 1);
1.10 deraadt 127: buf[4] = (u_char) type; /* 1st byte of payload is mesg-type */
1.36 avsm 128: if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
1.40 avsm 129: fatal("%s: write: %s", __func__, strerror(errno));
1.36 avsm 130: if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
1.40 avsm 131: fatal("%s: write: %s", __func__, strerror(errno));
1.1 provos 132: }
133:
134: void
1.36 avsm 135: mm_request_receive(int sock, Buffer *m)
1.1 provos 136: {
137: u_char buf[4];
1.13 deraadt 138: u_int msg_len;
1.1 provos 139:
1.8 markus 140: debug3("%s entering", __func__);
1.1 provos 141:
1.40 avsm 142: if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
143: if (errno == EPIPE)
1.32 markus 144: cleanup_exit(255);
1.40 avsm 145: fatal("%s: read: %s", __func__, strerror(errno));
1.1 provos 146: }
1.45 djm 147: msg_len = get_u32(buf);
1.1 provos 148: if (msg_len > 256 * 1024)
1.8 markus 149: fatal("%s: read: bad msg_len %d", __func__, msg_len);
1.1 provos 150: buffer_clear(m);
151: buffer_append_space(m, msg_len);
1.40 avsm 152: if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
153: fatal("%s: read: %s", __func__, strerror(errno));
1.1 provos 154: }
155:
156: void
1.36 avsm 157: mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
1.1 provos 158: {
159: u_char rtype;
160:
1.8 markus 161: debug3("%s entering: type %d", __func__, type);
1.1 provos 162:
1.36 avsm 163: mm_request_receive(sock, m);
1.1 provos 164: rtype = buffer_get_char(m);
165: if (rtype != type)
1.8 markus 166: fatal("%s: read: rtype %d != type %d", __func__,
1.1 provos 167: rtype, type);
168: }
169:
170: DH *
171: mm_choose_dh(int min, int nbits, int max)
172: {
173: BIGNUM *p, *g;
174: int success = 0;
175: Buffer m;
176:
177: buffer_init(&m);
178: buffer_put_int(&m, min);
179: buffer_put_int(&m, nbits);
180: buffer_put_int(&m, max);
181:
1.7 mouring 182: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
1.1 provos 183:
1.8 markus 184: debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
1.7 mouring 185: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
1.1 provos 186:
187: success = buffer_get_char(&m);
188: if (success == 0)
1.8 markus 189: fatal("%s: MONITOR_ANS_MODULI failed", __func__);
1.1 provos 190:
191: if ((p = BN_new()) == NULL)
1.8 markus 192: fatal("%s: BN_new failed", __func__);
1.3 markus 193: if ((g = BN_new()) == NULL)
1.8 markus 194: fatal("%s: BN_new failed", __func__);
1.1 provos 195: buffer_get_bignum2(&m, p);
196: buffer_get_bignum2(&m, g);
197:
1.8 markus 198: debug3("%s: remaining %d", __func__, buffer_len(&m));
1.1 provos 199: buffer_free(&m);
200:
201: return (dh_new_group(g, p));
202: }
203:
204: int
205: mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
206: {
1.7 mouring 207: Kex *kex = *pmonitor->m_pkex;
1.1 provos 208: Buffer m;
209:
1.8 markus 210: debug3("%s entering", __func__);
1.1 provos 211:
212: buffer_init(&m);
213: buffer_put_int(&m, kex->host_key_index(key));
214: buffer_put_string(&m, data, datalen);
215:
1.7 mouring 216: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
1.1 provos 217:
1.8 markus 218: debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
1.7 mouring 219: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
1.1 provos 220: *sigp = buffer_get_string(&m, lenp);
221: buffer_free(&m);
222:
223: return (0);
224: }
225:
226: struct passwd *
1.37 dtucker 227: mm_getpwnamallow(const char *username)
1.1 provos 228: {
229: Buffer m;
230: struct passwd *pw;
1.72 djm 231: u_int len, i;
1.55 dtucker 232: ServerOptions *newopts;
1.1 provos 233:
1.8 markus 234: debug3("%s entering", __func__);
1.1 provos 235:
236: buffer_init(&m);
1.37 dtucker 237: buffer_put_cstring(&m, username);
1.1 provos 238:
1.7 mouring 239: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
1.1 provos 240:
1.8 markus 241: debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
1.7 mouring 242: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
1.1 provos 243:
244: if (buffer_get_char(&m) == 0) {
1.60 dtucker 245: pw = NULL;
246: goto out;
1.1 provos 247: }
1.55 dtucker 248: pw = buffer_get_string(&m, &len);
249: if (len != sizeof(struct passwd))
1.8 markus 250: fatal("%s: struct passwd size mismatch", __func__);
1.1 provos 251: pw->pw_name = buffer_get_string(&m, NULL);
252: pw->pw_passwd = buffer_get_string(&m, NULL);
253: pw->pw_gecos = buffer_get_string(&m, NULL);
254: pw->pw_class = buffer_get_string(&m, NULL);
255: pw->pw_dir = buffer_get_string(&m, NULL);
256: pw->pw_shell = buffer_get_string(&m, NULL);
1.55 dtucker 257:
1.60 dtucker 258: out:
1.55 dtucker 259: /* copy options block as a Match directive may have changed some */
260: newopts = buffer_get_string(&m, &len);
261: if (len != sizeof(*newopts))
262: fatal("%s: option block size mismatch", __func__);
1.71 djm 263:
264: #define M_CP_STROPT(x) do { \
265: if (newopts->x != NULL) \
266: newopts->x = buffer_get_string(&m, NULL); \
267: } while (0)
1.72 djm 268: #define M_CP_STRARRAYOPT(x, nx) do { \
269: for (i = 0; i < newopts->nx; i++) \
270: newopts->x[i] = buffer_get_string(&m, NULL); \
271: } while (0)
1.71 djm 272: /* See comment in servconf.h */
273: COPY_MATCH_STRING_OPTS();
274: #undef M_CP_STROPT
1.72 djm 275: #undef M_CP_STRARRAYOPT
1.71 djm 276:
1.55 dtucker 277: copy_set_server_options(&options, newopts, 1);
1.76 ! djm 278: free(newopts);
1.55 dtucker 279:
1.1 provos 280: buffer_free(&m);
281:
282: return (pw);
1.6 djm 283: }
284:
1.33 markus 285: char *
286: mm_auth2_read_banner(void)
1.6 djm 287: {
288: Buffer m;
289: char *banner;
290:
1.8 markus 291: debug3("%s entering", __func__);
1.6 djm 292:
293: buffer_init(&m);
1.7 mouring 294: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
1.6 djm 295: buffer_clear(&m);
296:
1.33 markus 297: mm_request_receive_expect(pmonitor->m_recvfd,
298: MONITOR_ANS_AUTH2_READ_BANNER, &m);
1.6 djm 299: banner = buffer_get_string(&m, NULL);
300: buffer_free(&m);
1.10 deraadt 301:
1.33 markus 302: /* treat empty banner as missing banner */
303: if (strlen(banner) == 0) {
1.76 ! djm 304: free(banner);
1.33 markus 305: banner = NULL;
306: }
1.6 djm 307: return (banner);
1.1 provos 308: }
309:
310: /* Inform the privileged process about service and style */
311:
312: void
313: mm_inform_authserv(char *service, char *style)
314: {
315: Buffer m;
316:
1.8 markus 317: debug3("%s entering", __func__);
1.1 provos 318:
319: buffer_init(&m);
320: buffer_put_cstring(&m, service);
321: buffer_put_cstring(&m, style ? style : "");
322:
1.7 mouring 323: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
1.1 provos 324:
325: buffer_free(&m);
326: }
327:
328: /* Do the password authentication */
329: int
330: mm_auth_password(Authctxt *authctxt, char *password)
331: {
332: Buffer m;
333: int authenticated = 0;
334:
1.8 markus 335: debug3("%s entering", __func__);
1.1 provos 336:
337: buffer_init(&m);
338: buffer_put_cstring(&m, password);
1.7 mouring 339: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
1.1 provos 340:
1.8 markus 341: debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
1.7 mouring 342: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
1.1 provos 343:
344: authenticated = buffer_get_int(&m);
345:
346: buffer_free(&m);
347:
1.3 markus 348: debug3("%s: user %sauthenticated",
1.8 markus 349: __func__, authenticated ? "" : "not ");
1.1 provos 350: return (authenticated);
351: }
352:
353: int
354: mm_user_key_allowed(struct passwd *pw, Key *key)
355: {
356: return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
357: }
358:
359: int
360: mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
361: Key *key)
362: {
363: return (mm_key_allowed(MM_HOSTKEY, user, host, key));
364: }
365:
366: int
367: mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
368: char *host, Key *key)
369: {
370: int ret;
371:
372: key->type = KEY_RSA; /* XXX hack for key_to_blob */
373: ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
374: key->type = KEY_RSA1;
375: return (ret);
376: }
377:
378: int
379: mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
380: {
381: Buffer m;
382: u_char *blob;
383: u_int len;
1.22 markus 384: int allowed = 0, have_forced = 0;
1.1 provos 385:
1.8 markus 386: debug3("%s entering", __func__);
1.1 provos 387:
388: /* Convert the key to a blob and the pass it over */
389: if (!key_to_blob(key, &blob, &len))
390: return (0);
391:
392: buffer_init(&m);
393: buffer_put_int(&m, type);
394: buffer_put_cstring(&m, user ? user : "");
395: buffer_put_cstring(&m, host ? host : "");
396: buffer_put_string(&m, blob, len);
1.76 ! djm 397: free(blob);
1.1 provos 398:
1.7 mouring 399: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
1.1 provos 400:
1.8 markus 401: debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
1.7 mouring 402: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
1.1 provos 403:
404: allowed = buffer_get_int(&m);
405:
1.22 markus 406: /* fake forced command */
407: auth_clear_options();
408: have_forced = buffer_get_int(&m);
409: forced_command = have_forced ? xstrdup("true") : NULL;
410:
1.1 provos 411: buffer_free(&m);
412:
413: return (allowed);
414: }
415:
1.3 markus 416: /*
1.1 provos 417: * This key verify needs to send the key type along, because the
418: * privileged parent makes the decision if the key is allowed
419: * for authentication.
420: */
421:
422: int
423: mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
424: {
425: Buffer m;
426: u_char *blob;
427: u_int len;
428: int verified = 0;
429:
1.8 markus 430: debug3("%s entering", __func__);
1.1 provos 431:
432: /* Convert the key to a blob and the pass it over */
433: if (!key_to_blob(key, &blob, &len))
434: return (0);
435:
436: buffer_init(&m);
437: buffer_put_string(&m, blob, len);
438: buffer_put_string(&m, sig, siglen);
439: buffer_put_string(&m, data, datalen);
1.76 ! djm 440: free(blob);
1.1 provos 441:
1.7 mouring 442: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
1.1 provos 443:
1.8 markus 444: debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
1.7 mouring 445: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
1.1 provos 446:
447: verified = buffer_get_int(&m);
448:
449: buffer_free(&m);
450:
451: return (verified);
452: }
453:
454: /* Export key state after authentication */
455: Newkeys *
456: mm_newkeys_from_blob(u_char *blob, int blen)
457: {
458: Buffer b;
459: u_int len;
460: Newkeys *newkey = NULL;
461: Enc *enc;
462: Mac *mac;
463: Comp *comp;
464:
1.8 markus 465: debug3("%s: %p(%d)", __func__, blob, blen);
1.1 provos 466: #ifdef DEBUG_PK
467: dump_base64(stderr, blob, blen);
468: #endif
469: buffer_init(&b);
470: buffer_append(&b, blob, blen);
471:
472: newkey = xmalloc(sizeof(*newkey));
473: enc = &newkey->enc;
474: mac = &newkey->mac;
475: comp = &newkey->comp;
476:
477: /* Enc structure */
478: enc->name = buffer_get_string(&b, NULL);
479: buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
480: enc->enabled = buffer_get_int(&b);
481: enc->block_size = buffer_get_int(&b);
482: enc->key = buffer_get_string(&b, &enc->key_len);
1.75 markus 483: enc->iv = buffer_get_string(&b, &enc->iv_len);
1.1 provos 484:
485: if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
1.8 markus 486: fatal("%s: bad cipher name %s or pointer %p", __func__,
1.1 provos 487: enc->name, enc->cipher);
488:
489: /* Mac structure */
1.75 markus 490: if (cipher_authlen(enc->cipher) == 0) {
491: mac->name = buffer_get_string(&b, NULL);
492: if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
493: fatal("%s: can not setup mac %s", __func__, mac->name);
494: mac->enabled = buffer_get_int(&b);
495: mac->key = buffer_get_string(&b, &len);
496: if (len > mac->key_len)
497: fatal("%s: bad mac key length: %u > %d", __func__, len,
498: mac->key_len);
499: mac->key_len = len;
500: }
1.1 provos 501:
502: /* Comp structure */
503: comp->type = buffer_get_int(&b);
504: comp->enabled = buffer_get_int(&b);
505: comp->name = buffer_get_string(&b, NULL);
506:
507: len = buffer_len(&b);
508: if (len != 0)
1.12 deraadt 509: error("newkeys_from_blob: remaining bytes in blob %u", len);
1.1 provos 510: buffer_free(&b);
511: return (newkey);
512: }
513:
514: int
515: mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
516: {
517: Buffer b;
518: int len;
519: Enc *enc;
520: Mac *mac;
521: Comp *comp;
1.66 andreas 522: Newkeys *newkey = (Newkeys *)packet_get_newkeys(mode);
1.1 provos 523:
1.8 markus 524: debug3("%s: converting %p", __func__, newkey);
1.1 provos 525:
526: if (newkey == NULL) {
1.8 markus 527: error("%s: newkey == NULL", __func__);
1.1 provos 528: return 0;
529: }
530: enc = &newkey->enc;
531: mac = &newkey->mac;
532: comp = &newkey->comp;
533:
534: buffer_init(&b);
535: /* Enc structure */
536: buffer_put_cstring(&b, enc->name);
537: /* The cipher struct is constant and shared, you export pointer */
538: buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
539: buffer_put_int(&b, enc->enabled);
540: buffer_put_int(&b, enc->block_size);
541: buffer_put_string(&b, enc->key, enc->key_len);
1.75 markus 542: packet_get_keyiv(mode, enc->iv, enc->iv_len);
543: buffer_put_string(&b, enc->iv, enc->iv_len);
1.1 provos 544:
545: /* Mac structure */
1.75 markus 546: if (cipher_authlen(enc->cipher) == 0) {
547: buffer_put_cstring(&b, mac->name);
548: buffer_put_int(&b, mac->enabled);
549: buffer_put_string(&b, mac->key, mac->key_len);
550: }
1.1 provos 551:
552: /* Comp structure */
553: buffer_put_int(&b, comp->type);
554: buffer_put_int(&b, comp->enabled);
555: buffer_put_cstring(&b, comp->name);
556:
557: len = buffer_len(&b);
1.16 markus 558: if (lenp != NULL)
559: *lenp = len;
560: if (blobp != NULL) {
561: *blobp = xmalloc(len);
562: memcpy(*blobp, buffer_ptr(&b), len);
563: }
1.1 provos 564: memset(buffer_ptr(&b), 0, len);
565: buffer_free(&b);
566: return len;
567: }
568:
1.2 markus 569: static void
1.1 provos 570: mm_send_kex(Buffer *m, Kex *kex)
571: {
572: buffer_put_string(m, kex->session_id, kex->session_id_len);
573: buffer_put_int(m, kex->we_need);
574: buffer_put_int(m, kex->hostkey_type);
575: buffer_put_int(m, kex->kex_type);
576: buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
577: buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
578: buffer_put_int(m, kex->flags);
579: buffer_put_cstring(m, kex->client_version_string);
580: buffer_put_cstring(m, kex->server_version_string);
581: }
582:
583: void
1.36 avsm 584: mm_send_keystate(struct monitor *monitor)
1.1 provos 585: {
1.66 andreas 586: Buffer m, *input, *output;
1.1 provos 587: u_char *blob, *p;
588: u_int bloblen, plen;
1.25 markus 589: u_int32_t seqnr, packets;
1.63 markus 590: u_int64_t blocks, bytes;
1.1 provos 591:
592: buffer_init(&m);
593:
594: if (!compat20) {
595: u_char iv[24];
1.11 markus 596: u_char *key;
597: u_int ivlen, keylen;
1.1 provos 598:
599: buffer_put_int(&m, packet_get_protocol_flags());
600:
601: buffer_put_int(&m, packet_get_ssh1_cipher());
602:
1.11 markus 603: debug3("%s: Sending ssh1 KEY+IV", __func__);
604: keylen = packet_get_encryption_key(NULL);
605: key = xmalloc(keylen+1); /* add 1 if keylen == 0 */
606: keylen = packet_get_encryption_key(key);
607: buffer_put_string(&m, key, keylen);
608: memset(key, 0, keylen);
1.76 ! djm 609: free(key);
1.11 markus 610:
1.1 provos 611: ivlen = packet_get_keyiv_len(MODE_OUT);
612: packet_get_keyiv(MODE_OUT, iv, ivlen);
613: buffer_put_string(&m, iv, ivlen);
1.74 naddy 614: ivlen = packet_get_keyiv_len(MODE_IN);
1.1 provos 615: packet_get_keyiv(MODE_IN, iv, ivlen);
616: buffer_put_string(&m, iv, ivlen);
617: goto skip;
618: } else {
619: /* Kex for rekeying */
1.36 avsm 620: mm_send_kex(&m, *monitor->m_pkex);
1.1 provos 621: }
622:
623: debug3("%s: Sending new keys: %p %p",
1.66 andreas 624: __func__, packet_get_newkeys(MODE_OUT),
625: packet_get_newkeys(MODE_IN));
1.1 provos 626:
627: /* Keys from Kex */
628: if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
1.8 markus 629: fatal("%s: conversion of newkeys failed", __func__);
1.1 provos 630:
631: buffer_put_string(&m, blob, bloblen);
1.76 ! djm 632: free(blob);
1.1 provos 633:
634: if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
1.8 markus 635: fatal("%s: conversion of newkeys failed", __func__);
1.1 provos 636:
637: buffer_put_string(&m, blob, bloblen);
1.76 ! djm 638: free(blob);
1.1 provos 639:
1.63 markus 640: packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
1.25 markus 641: buffer_put_int(&m, seqnr);
642: buffer_put_int64(&m, blocks);
643: buffer_put_int(&m, packets);
1.63 markus 644: buffer_put_int64(&m, bytes);
645: packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
1.25 markus 646: buffer_put_int(&m, seqnr);
647: buffer_put_int64(&m, blocks);
648: buffer_put_int(&m, packets);
1.63 markus 649: buffer_put_int64(&m, bytes);
1.1 provos 650:
1.8 markus 651: debug3("%s: New keys have been sent", __func__);
1.1 provos 652: skip:
653: /* More key context */
654: plen = packet_get_keycontext(MODE_OUT, NULL);
655: p = xmalloc(plen+1);
656: packet_get_keycontext(MODE_OUT, p);
657: buffer_put_string(&m, p, plen);
1.76 ! djm 658: free(p);
1.1 provos 659:
660: plen = packet_get_keycontext(MODE_IN, NULL);
661: p = xmalloc(plen+1);
662: packet_get_keycontext(MODE_IN, p);
663: buffer_put_string(&m, p, plen);
1.76 ! djm 664: free(p);
1.1 provos 665:
666: /* Compression state */
1.8 markus 667: debug3("%s: Sending compression state", __func__);
1.1 provos 668: buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
669: buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
670:
671: /* Network I/O buffers */
1.66 andreas 672: input = (Buffer *)packet_get_input();
673: output = (Buffer *)packet_get_output();
674: buffer_put_string(&m, buffer_ptr(input), buffer_len(input));
675: buffer_put_string(&m, buffer_ptr(output), buffer_len(output));
1.67 andreas 676:
677: /* Roaming */
678: if (compat20) {
679: buffer_put_int64(&m, get_sent_bytes());
680: buffer_put_int64(&m, get_recv_bytes());
681: }
1.1 provos 682:
1.36 avsm 683: mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
1.8 markus 684: debug3("%s: Finished sending state", __func__);
1.1 provos 685:
686: buffer_free(&m);
687: }
688:
689: int
1.42 deraadt 690: mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
1.1 provos 691: {
692: Buffer m;
1.39 dtucker 693: char *p, *msg;
1.62 djm 694: int success = 0, tmp1 = -1, tmp2 = -1;
695:
696: /* Kludge: ensure there are fds free to receive the pty/tty */
697: if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
698: (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
699: error("%s: cannot allocate fds for pty", __func__);
700: if (tmp1 > 0)
701: close(tmp1);
702: if (tmp2 > 0)
703: close(tmp2);
704: return 0;
705: }
706: close(tmp1);
707: close(tmp2);
1.1 provos 708:
709: buffer_init(&m);
1.7 mouring 710: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
1.1 provos 711:
1.8 markus 712: debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
1.7 mouring 713: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
1.1 provos 714:
715: success = buffer_get_int(&m);
716: if (success == 0) {
1.8 markus 717: debug3("%s: pty alloc failed", __func__);
1.1 provos 718: buffer_free(&m);
719: return (0);
720: }
721: p = buffer_get_string(&m, NULL);
1.39 dtucker 722: msg = buffer_get_string(&m, NULL);
1.1 provos 723: buffer_free(&m);
724:
725: strlcpy(namebuf, p, namebuflen); /* Possible truncation */
1.76 ! djm 726: free(p);
1.39 dtucker 727:
728: buffer_append(&loginmsg, msg, strlen(msg));
1.76 ! djm 729: free(msg);
1.1 provos 730:
1.58 djm 731: if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
732: (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
733: fatal("%s: receive fds failed", __func__);
1.1 provos 734:
735: /* Success */
736: return (1);
737: }
738:
739: void
1.32 markus 740: mm_session_pty_cleanup2(Session *s)
1.1 provos 741: {
742: Buffer m;
743:
744: if (s->ttyfd == -1)
745: return;
746: buffer_init(&m);
747: buffer_put_cstring(&m, s->tty);
1.7 mouring 748: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
1.1 provos 749: buffer_free(&m);
1.3 markus 750:
1.1 provos 751: /* closed dup'ed master */
1.62 djm 752: if (s->ptymaster != -1 && close(s->ptymaster) < 0)
753: error("close(s->ptymaster/%d): %s",
754: s->ptymaster, strerror(errno));
1.1 provos 755:
756: /* unlink pty from session */
757: s->ttyfd = -1;
758: }
759:
760: /* Request process termination */
761:
762: void
763: mm_terminate(void)
764: {
765: Buffer m;
766:
767: buffer_init(&m);
1.7 mouring 768: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
1.1 provos 769: buffer_free(&m);
770: }
771:
772: int
773: mm_ssh1_session_key(BIGNUM *num)
774: {
775: int rsafail;
776: Buffer m;
777:
778: buffer_init(&m);
779: buffer_put_bignum2(&m, num);
1.7 mouring 780: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
1.1 provos 781:
1.7 mouring 782: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
1.1 provos 783:
784: rsafail = buffer_get_int(&m);
785: buffer_get_bignum2(&m, num);
786:
787: buffer_free(&m);
788:
789: return (rsafail);
790: }
791:
1.2 markus 792: static void
1.1 provos 793: mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
794: char ***prompts, u_int **echo_on)
795: {
1.10 deraadt 796: *name = xstrdup("");
797: *infotxt = xstrdup("");
1.1 provos 798: *numprompts = 1;
1.43 djm 799: *prompts = xcalloc(*numprompts, sizeof(char *));
800: *echo_on = xcalloc(*numprompts, sizeof(u_int));
1.1 provos 801: (*echo_on)[0] = 0;
802: }
803:
804: int
805: mm_bsdauth_query(void *ctx, char **name, char **infotxt,
806: u_int *numprompts, char ***prompts, u_int **echo_on)
807: {
808: Buffer m;
1.21 markus 809: u_int success;
1.1 provos 810: char *challenge;
811:
1.8 markus 812: debug3("%s: entering", __func__);
1.1 provos 813:
814: buffer_init(&m);
1.7 mouring 815: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
1.1 provos 816:
1.7 mouring 817: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
1.1 provos 818: &m);
1.21 markus 819: success = buffer_get_int(&m);
820: if (success == 0) {
1.8 markus 821: debug3("%s: no challenge", __func__);
1.1 provos 822: buffer_free(&m);
823: return (-1);
824: }
825:
826: /* Get the challenge, and format the response */
827: challenge = buffer_get_string(&m, NULL);
828: buffer_free(&m);
829:
830: mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
831: (*prompts)[0] = challenge;
832:
1.8 markus 833: debug3("%s: received challenge: %s", __func__, challenge);
1.1 provos 834:
835: return (0);
836: }
837:
838: int
839: mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
840: {
841: Buffer m;
842: int authok;
843:
1.8 markus 844: debug3("%s: entering", __func__);
1.1 provos 845: if (numresponses != 1)
846: return (-1);
847:
848: buffer_init(&m);
849: buffer_put_cstring(&m, responses[0]);
1.7 mouring 850: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
1.1 provos 851:
1.7 mouring 852: mm_request_receive_expect(pmonitor->m_recvfd,
1.1 provos 853: MONITOR_ANS_BSDAUTHRESPOND, &m);
854:
855: authok = buffer_get_int(&m);
856: buffer_free(&m);
857:
858: return ((authok == 0) ? -1 : 0);
859: }
860:
861:
862: void
863: mm_ssh1_session_id(u_char session_id[16])
864: {
865: Buffer m;
866: int i;
867:
1.8 markus 868: debug3("%s entering", __func__);
1.1 provos 869:
870: buffer_init(&m);
871: for (i = 0; i < 16; i++)
872: buffer_put_char(&m, session_id[i]);
873:
1.7 mouring 874: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1.1 provos 875: buffer_free(&m);
876: }
877:
878: int
879: mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
880: {
881: Buffer m;
882: Key *key;
883: u_char *blob;
884: u_int blen;
1.22 markus 885: int allowed = 0, have_forced = 0;
1.1 provos 886:
1.8 markus 887: debug3("%s entering", __func__);
1.1 provos 888:
889: buffer_init(&m);
890: buffer_put_bignum2(&m, client_n);
891:
1.7 mouring 892: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
893: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1.1 provos 894:
895: allowed = buffer_get_int(&m);
1.22 markus 896:
897: /* fake forced command */
898: auth_clear_options();
899: have_forced = buffer_get_int(&m);
900: forced_command = have_forced ? xstrdup("true") : NULL;
1.1 provos 901:
902: if (allowed && rkey != NULL) {
903: blob = buffer_get_string(&m, &blen);
904: if ((key = key_from_blob(blob, blen)) == NULL)
1.8 markus 905: fatal("%s: key_from_blob failed", __func__);
1.1 provos 906: *rkey = key;
1.76 ! djm 907: free(blob);
1.1 provos 908: }
909: buffer_free(&m);
910:
911: return (allowed);
912: }
913:
914: BIGNUM *
915: mm_auth_rsa_generate_challenge(Key *key)
916: {
917: Buffer m;
918: BIGNUM *challenge;
919: u_char *blob;
920: u_int blen;
921:
1.8 markus 922: debug3("%s entering", __func__);
1.1 provos 923:
924: if ((challenge = BN_new()) == NULL)
1.8 markus 925: fatal("%s: BN_new failed", __func__);
1.1 provos 926:
927: key->type = KEY_RSA; /* XXX cheat for key_to_blob */
928: if (key_to_blob(key, &blob, &blen) == 0)
1.8 markus 929: fatal("%s: key_to_blob failed", __func__);
1.1 provos 930: key->type = KEY_RSA1;
931:
932: buffer_init(&m);
933: buffer_put_string(&m, blob, blen);
1.76 ! djm 934: free(blob);
1.1 provos 935:
1.7 mouring 936: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
937: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1.1 provos 938:
939: buffer_get_bignum2(&m, challenge);
940: buffer_free(&m);
941:
942: return (challenge);
943: }
944:
945: int
946: mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
947: {
948: Buffer m;
949: u_char *blob;
950: u_int blen;
951: int success = 0;
952:
1.8 markus 953: debug3("%s entering", __func__);
1.1 provos 954:
955: key->type = KEY_RSA; /* XXX cheat for key_to_blob */
956: if (key_to_blob(key, &blob, &blen) == 0)
1.8 markus 957: fatal("%s: key_to_blob failed", __func__);
1.1 provos 958: key->type = KEY_RSA1;
959:
960: buffer_init(&m);
961: buffer_put_string(&m, blob, blen);
962: buffer_put_string(&m, response, 16);
1.76 ! djm 963: free(blob);
1.1 provos 964:
1.7 mouring 965: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
966: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1.1 provos 967:
968: success = buffer_get_int(&m);
969: buffer_free(&m);
970:
971: return (success);
972: }
1.29 markus 973:
974: #ifdef GSSAPI
975: OM_uint32
1.36 avsm 976: mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1.29 markus 977: {
978: Buffer m;
979: OM_uint32 major;
980:
981: /* Client doesn't get to see the context */
982: *ctx = NULL;
983:
984: buffer_init(&m);
1.36 avsm 985: buffer_put_string(&m, goid->elements, goid->length);
1.29 markus 986:
987: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
988: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
989:
990: major = buffer_get_int(&m);
991:
992: buffer_free(&m);
993: return (major);
994: }
995:
996: OM_uint32
997: mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
998: gss_buffer_desc *out, OM_uint32 *flags)
999: {
1000: Buffer m;
1001: OM_uint32 major;
1.30 deraadt 1002: u_int len;
1.29 markus 1003:
1004: buffer_init(&m);
1005: buffer_put_string(&m, in->value, in->length);
1006:
1007: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1008: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1009:
1010: major = buffer_get_int(&m);
1.30 deraadt 1011: out->value = buffer_get_string(&m, &len);
1012: out->length = len;
1.29 markus 1013: if (flags)
1014: *flags = buffer_get_int(&m);
1015:
1016: buffer_free(&m);
1017:
1018: return (major);
1.35 markus 1019: }
1020:
1021: OM_uint32
1022: mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1023: {
1024: Buffer m;
1025: OM_uint32 major;
1026:
1027: buffer_init(&m);
1028: buffer_put_string(&m, gssbuf->value, gssbuf->length);
1029: buffer_put_string(&m, gssmic->value, gssmic->length);
1030:
1031: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1032: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1033: &m);
1034:
1035: major = buffer_get_int(&m);
1036: buffer_free(&m);
1037: return(major);
1.29 markus 1038: }
1039:
1040: int
1041: mm_ssh_gssapi_userok(char *user)
1042: {
1043: Buffer m;
1044: int authenticated = 0;
1045:
1046: buffer_init(&m);
1047:
1048: mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1049: mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1050: &m);
1051:
1052: authenticated = buffer_get_int(&m);
1053:
1054: buffer_free(&m);
1055: debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1056: return (authenticated);
1057: }
1058: #endif /* GSSAPI */
1.64 djm 1059:
1060: #ifdef JPAKE
1061: void
1062: mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1063: char **hash_scheme, char **salt)
1064: {
1065: Buffer m;
1066:
1067: debug3("%s entering", __func__);
1068:
1069: buffer_init(&m);
1070: mm_request_send(pmonitor->m_recvfd,
1071: MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1072:
1073: debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1074: mm_request_receive_expect(pmonitor->m_recvfd,
1075: MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1076:
1077: *hash_scheme = buffer_get_string(&m, NULL);
1078: *salt = buffer_get_string(&m, NULL);
1079:
1080: buffer_free(&m);
1081: }
1082:
1083: void
1.65 djm 1084: mm_jpake_step1(struct modp_group *grp,
1.64 djm 1085: u_char **id, u_int *id_len,
1086: BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1087: u_char **priv1_proof, u_int *priv1_proof_len,
1088: u_char **priv2_proof, u_int *priv2_proof_len)
1089: {
1090: Buffer m;
1091:
1092: debug3("%s entering", __func__);
1093:
1094: buffer_init(&m);
1095: mm_request_send(pmonitor->m_recvfd,
1096: MONITOR_REQ_JPAKE_STEP1, &m);
1097:
1098: debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1099: mm_request_receive_expect(pmonitor->m_recvfd,
1100: MONITOR_ANS_JPAKE_STEP1, &m);
1101:
1102: if ((*priv1 = BN_new()) == NULL ||
1103: (*priv2 = BN_new()) == NULL ||
1104: (*g_priv1 = BN_new()) == NULL ||
1105: (*g_priv2 = BN_new()) == NULL)
1106: fatal("%s: BN_new", __func__);
1107:
1108: *id = buffer_get_string(&m, id_len);
1109: /* priv1 and priv2 are, well, private */
1110: buffer_get_bignum2(&m, *g_priv1);
1111: buffer_get_bignum2(&m, *g_priv2);
1112: *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1113: *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1114:
1115: buffer_free(&m);
1116: }
1117:
1118: void
1.65 djm 1119: mm_jpake_step2(struct modp_group *grp, BIGNUM *s,
1.64 djm 1120: BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1121: const u_char *theirid, u_int theirid_len,
1122: const u_char *myid, u_int myid_len,
1123: const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1124: const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1125: BIGNUM **newpub,
1126: u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1127: {
1128: Buffer m;
1129:
1130: debug3("%s entering", __func__);
1131:
1132: buffer_init(&m);
1133: /* monitor already has all bignums except theirpub1, theirpub2 */
1134: buffer_put_bignum2(&m, theirpub1);
1135: buffer_put_bignum2(&m, theirpub2);
1136: /* monitor already knows our id */
1137: buffer_put_string(&m, theirid, theirid_len);
1138: buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1139: buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1140:
1141: mm_request_send(pmonitor->m_recvfd,
1142: MONITOR_REQ_JPAKE_STEP2, &m);
1143:
1144: debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1145: mm_request_receive_expect(pmonitor->m_recvfd,
1146: MONITOR_ANS_JPAKE_STEP2, &m);
1147:
1148: if ((*newpub = BN_new()) == NULL)
1149: fatal("%s: BN_new", __func__);
1150:
1151: buffer_get_bignum2(&m, *newpub);
1152: *newpub_exponent_proof = buffer_get_string(&m,
1153: newpub_exponent_proof_len);
1154:
1155: buffer_free(&m);
1156: }
1157:
1158: void
1.65 djm 1159: mm_jpake_key_confirm(struct modp_group *grp, BIGNUM *s, BIGNUM *step2_val,
1.64 djm 1160: BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1161: BIGNUM *theirpub1, BIGNUM *theirpub2,
1162: const u_char *my_id, u_int my_id_len,
1163: const u_char *their_id, u_int their_id_len,
1164: const u_char *sess_id, u_int sess_id_len,
1165: const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1166: BIGNUM **k,
1167: u_char **confirm_hash, u_int *confirm_hash_len)
1168: {
1169: Buffer m;
1170:
1171: debug3("%s entering", __func__);
1172:
1173: buffer_init(&m);
1174: /* monitor already has all bignums except step2_val */
1175: buffer_put_bignum2(&m, step2_val);
1176: /* monitor already knows all the ids */
1177: buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1178:
1179: mm_request_send(pmonitor->m_recvfd,
1180: MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1181:
1182: debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1183: mm_request_receive_expect(pmonitor->m_recvfd,
1184: MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1185:
1186: /* 'k' is sensitive and stays in the monitor */
1187: *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1188:
1189: buffer_free(&m);
1190: }
1191:
1192: int
1193: mm_jpake_check_confirm(const BIGNUM *k,
1194: const u_char *peer_id, u_int peer_id_len,
1195: const u_char *sess_id, u_int sess_id_len,
1196: const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1197: {
1198: Buffer m;
1199: int success = 0;
1200:
1201: debug3("%s entering", __func__);
1202:
1203: buffer_init(&m);
1204: /* k is dummy in slave, ignored */
1205: /* monitor knows all the ids */
1206: buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1207: mm_request_send(pmonitor->m_recvfd,
1208: MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1209:
1210: debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1211: mm_request_receive_expect(pmonitor->m_recvfd,
1212: MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1213:
1214: success = buffer_get_int(&m);
1215: buffer_free(&m);
1216:
1217: debug3("%s: success = %d", __func__, success);
1218: return success;
1219: }
1220: #endif /* JPAKE */
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