crypto/openssh/monitor_wrap.c

   1 /* $OpenBSD: monitor_wrap.c,v 1.64 2008/11/04 08:22:13 djm Exp $ */
   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"
  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>
  40
  41 #include <openssl/bn.h>
  42 #include <openssl/dh.h>
  43 #include <openssl/evp.h>
  44
  45 #include "openbsd-compat/sys-queue.h"
  46 #include "xmalloc.h"
  47 #include "ssh.h"
  48 #include "dh.h"
  49 #include "buffer.h"
  50 #include "key.h"
  51 #include "cipher.h"
  52 #include "kex.h"
  53 #include "hostfile.h"
  54 #include "auth.h"
  55 #include "auth-options.h"
  56 #include "packet.h"
  57 #include "mac.h"
  58 #include "log.h"
  59 #ifdef TARGET_OS_MAC    /* XXX Broken krb5 headers on Mac */
  60 #undef TARGET_OS_MAC
  61 #include "zlib.h"
  62 #define TARGET_OS_MAC 1
  63 #else
  64 #include "zlib.h"
  65 #endif
  66 #include "monitor.h"
  67 #ifdef GSSAPI
  68 #include "ssh-gss.h"
  69 #endif
  70 #include "monitor_wrap.h"
  71 #include "atomicio.h"
  72 #include "monitor_fdpass.h"
  73 #include "misc.h"
  74 #include "jpake.h"
  75
  76 #include "channels.h"
  77 #include "session.h"
  78 #include "servconf.h"
  79
  80 /* Imports */
  81 extern int compat20;
  82 extern Newkeys *newkeys[];
  83 extern z_stream incoming_stream;
  84 extern z_stream outgoing_stream;
  85 extern struct monitor *pmonitor;
  86 extern Buffer input, output;
  87 extern Buffer loginmsg;
  88 extern ServerOptions options;
  89
  90 int
  91 mm_is_monitor(void)
  92 {
  93         /*
  94          * m_pid is only set in the privileged part, and
  95          * points to the unprivileged child.
  96          */
  97         return (pmonitor && pmonitor->m_pid > 0);
  98 }
  99
 100 void
 101 mm_request_send(int sock, enum monitor_reqtype type, Buffer *m)
 102 {
 103         u_int mlen = buffer_len(m);
 104         u_char buf[5];
 105
 106         debug3("%s entering: type %d", __func__, type);
 107
 108         put_u32(buf, mlen + 1);
 109         buf[4] = (u_char) type;         /* 1st byte of payload is mesg-type */
 110         if (atomicio(vwrite, sock, buf, sizeof(buf)) != sizeof(buf))
 111                 fatal("%s: write: %s", __func__, strerror(errno));
 112         if (atomicio(vwrite, sock, buffer_ptr(m), mlen) != mlen)
 113                 fatal("%s: write: %s", __func__, strerror(errno));
 114 }
 115
 116 void
 117 mm_request_receive(int sock, Buffer *m)
 118 {
 119         u_char buf[4];
 120         u_int msg_len;
 121
 122         debug3("%s entering", __func__);
 123
 124         if (atomicio(read, sock, buf, sizeof(buf)) != sizeof(buf)) {
 125                 if (errno == EPIPE)
 126                         cleanup_exit(255);
 127                 fatal("%s: read: %s", __func__, strerror(errno));
 128         }
 129         msg_len = get_u32(buf);
 130         if (msg_len > 256 * 1024)
 131                 fatal("%s: read: bad msg_len %d", __func__, msg_len);
 132         buffer_clear(m);
 133         buffer_append_space(m, msg_len);
 134         if (atomicio(read, sock, buffer_ptr(m), msg_len) != msg_len)
 135                 fatal("%s: read: %s", __func__, strerror(errno));
 136 }
 137
 138 void
 139 mm_request_receive_expect(int sock, enum monitor_reqtype type, Buffer *m)
 140 {
 141         u_char rtype;
 142
 143         debug3("%s entering: type %d", __func__, type);
 144
 145         mm_request_receive(sock, m);
 146         rtype = buffer_get_char(m);
 147         if (rtype != type)
 148                 fatal("%s: read: rtype %d != type %d", __func__,
 149                     rtype, type);
 150 }
 151
 152 DH *
 153 mm_choose_dh(int min, int nbits, int max)
 154 {
 155         BIGNUM *p, *g;
 156         int success = 0;
 157         Buffer m;
 158
 159         buffer_init(&m);
 160         buffer_put_int(&m, min);
 161         buffer_put_int(&m, nbits);
 162         buffer_put_int(&m, max);
 163
 164         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_MODULI, &m);
 165
 166         debug3("%s: waiting for MONITOR_ANS_MODULI", __func__);
 167         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_MODULI, &m);
 168
 169         success = buffer_get_char(&m);
 170         if (success == 0)
 171                 fatal("%s: MONITOR_ANS_MODULI failed", __func__);
 172
 173         if ((p = BN_new()) == NULL)
 174                 fatal("%s: BN_new failed", __func__);
 175         if ((g = BN_new()) == NULL)
 176                 fatal("%s: BN_new failed", __func__);
 177         buffer_get_bignum2(&m, p);
 178         buffer_get_bignum2(&m, g);
 179
 180         debug3("%s: remaining %d", __func__, buffer_len(&m));
 181         buffer_free(&m);
 182
 183         return (dh_new_group(g, p));
 184 }
 185
 186 int
 187 mm_key_sign(Key *key, u_char **sigp, u_int *lenp, u_char *data, u_int datalen)
 188 {
 189         Kex *kex = *pmonitor->m_pkex;
 190         Buffer m;
 191
 192         debug3("%s entering", __func__);
 193
 194         buffer_init(&m);
 195         buffer_put_int(&m, kex->host_key_index(key));
 196         buffer_put_string(&m, data, datalen);
 197
 198         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SIGN, &m);
 199
 200         debug3("%s: waiting for MONITOR_ANS_SIGN", __func__);
 201         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SIGN, &m);
 202         *sigp  = buffer_get_string(&m, lenp);
 203         buffer_free(&m);
 204
 205         return (0);
 206 }
 207
 208 struct passwd *
 209 mm_getpwnamallow(const char *username)
 210 {
 211         Buffer m;
 212         struct passwd *pw;
 213         u_int len;
 214         ServerOptions *newopts;
 215
 216         debug3("%s entering", __func__);
 217
 218         buffer_init(&m);
 219         buffer_put_cstring(&m, username);
 220
 221         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PWNAM, &m);
 222
 223         debug3("%s: waiting for MONITOR_ANS_PWNAM", __func__);
 224         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PWNAM, &m);
 225
 226         if (buffer_get_char(&m) == 0) {
 227                 pw = NULL;
 228                 goto out;
 229         }
 230         pw = buffer_get_string(&m, &len);
 231         if (len != sizeof(struct passwd))
 232                 fatal("%s: struct passwd size mismatch", __func__);
 233         pw->pw_name = buffer_get_string(&m, NULL);
 234         pw->pw_passwd = buffer_get_string(&m, NULL);
 235         pw->pw_gecos = buffer_get_string(&m, NULL);
 236 #ifdef HAVE_PW_CLASS_IN_PASSWD
 237         pw->pw_class = buffer_get_string(&m, NULL);
 238 #endif
 239         pw->pw_dir = buffer_get_string(&m, NULL);
 240         pw->pw_shell = buffer_get_string(&m, NULL);
 241
 242 out:
 243         /* copy options block as a Match directive may have changed some */
 244         newopts = buffer_get_string(&m, &len);
 245         if (len != sizeof(*newopts))
 246                 fatal("%s: option block size mismatch", __func__);
 247         if (newopts->banner != NULL)
 248                 newopts->banner = buffer_get_string(&m, NULL);
 249         copy_set_server_options(&options, newopts, 1);
 250         xfree(newopts);
 251
 252         buffer_free(&m);
 253
 254         return (pw);
 255 }
 256
 257 char *
 258 mm_auth2_read_banner(void)
 259 {
 260         Buffer m;
 261         char *banner;
 262
 263         debug3("%s entering", __func__);
 264
 265         buffer_init(&m);
 266         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTH2_READ_BANNER, &m);
 267         buffer_clear(&m);
 268
 269         mm_request_receive_expect(pmonitor->m_recvfd,
 270             MONITOR_ANS_AUTH2_READ_BANNER, &m);
 271         banner = buffer_get_string(&m, NULL);
 272         buffer_free(&m);
 273
 274         /* treat empty banner as missing banner */
 275         if (strlen(banner) == 0) {
 276                 xfree(banner);
 277                 banner = NULL;
 278         }
 279         return (banner);
 280 }
 281
 282 /* Inform the privileged process about service and style */
 283
 284 void
 285 mm_inform_authserv(char *service, char *style)
 286 {
 287         Buffer m;
 288
 289         debug3("%s entering", __func__);
 290
 291         buffer_init(&m);
 292         buffer_put_cstring(&m, service);
 293         buffer_put_cstring(&m, style ? style : "");
 294
 295         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHSERV, &m);
 296
 297         buffer_free(&m);
 298 }
 299
 300 /* Do the password authentication */
 301 int
 302 mm_auth_password(Authctxt *authctxt, char *password)
 303 {
 304         Buffer m;
 305         int authenticated = 0;
 306
 307         debug3("%s entering", __func__);
 308
 309         buffer_init(&m);
 310         buffer_put_cstring(&m, password);
 311         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUTHPASSWORD, &m);
 312
 313         debug3("%s: waiting for MONITOR_ANS_AUTHPASSWORD", __func__);
 314         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_AUTHPASSWORD, &m);
 315
 316         authenticated = buffer_get_int(&m);
 317
 318         buffer_free(&m);
 319
 320         debug3("%s: user %sauthenticated",
 321             __func__, authenticated ? "" : "not ");
 322         return (authenticated);
 323 }
 324
 325 int
 326 mm_user_key_allowed(struct passwd *pw, Key *key)
 327 {
 328         return (mm_key_allowed(MM_USERKEY, NULL, NULL, key));
 329 }
 330
 331 int
 332 mm_hostbased_key_allowed(struct passwd *pw, char *user, char *host,
 333     Key *key)
 334 {
 335         return (mm_key_allowed(MM_HOSTKEY, user, host, key));
 336 }
 337
 338 int
 339 mm_auth_rhosts_rsa_key_allowed(struct passwd *pw, char *user,
 340     char *host, Key *key)
 341 {
 342         int ret;
 343
 344         key->type = KEY_RSA; /* XXX hack for key_to_blob */
 345         ret = mm_key_allowed(MM_RSAHOSTKEY, user, host, key);
 346         key->type = KEY_RSA1;
 347         return (ret);
 348 }
 349
 350 static void
 351 mm_send_debug(Buffer *m)
 352 {
 353         char *msg;
 354
 355         while (buffer_len(m)) {
 356                 msg = buffer_get_string(m, NULL);
 357                 debug3("%s: Sending debug: %s", __func__, msg);
 358                 packet_send_debug("%s", msg);
 359                 xfree(msg);
 360         }
 361 }
 362
 363 int
 364 mm_key_allowed(enum mm_keytype type, char *user, char *host, Key *key)
 365 {
 366         Buffer m;
 367         u_char *blob;
 368         u_int len;
 369         int allowed = 0, have_forced = 0;
 370
 371         debug3("%s entering", __func__);
 372
 373         /* Convert the key to a blob and the pass it over */
 374         if (!key_to_blob(key, &blob, &len))
 375                 return (0);
 376
 377         buffer_init(&m);
 378         buffer_put_int(&m, type);
 379         buffer_put_cstring(&m, user ? user : "");
 380         buffer_put_cstring(&m, host ? host : "");
 381         buffer_put_string(&m, blob, len);
 382         xfree(blob);
 383
 384         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYALLOWED, &m);
 385
 386         debug3("%s: waiting for MONITOR_ANS_KEYALLOWED", __func__);
 387         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYALLOWED, &m);
 388
 389         allowed = buffer_get_int(&m);
 390
 391         /* fake forced command */
 392         auth_clear_options();
 393         have_forced = buffer_get_int(&m);
 394         forced_command = have_forced ? xstrdup("true") : NULL;
 395
 396         /* Send potential debug messages */
 397         mm_send_debug(&m);
 398
 399         buffer_free(&m);
 400
 401         return (allowed);
 402 }
 403
 404 /*
 405  * This key verify needs to send the key type along, because the
 406  * privileged parent makes the decision if the key is allowed
 407  * for authentication.
 408  */
 409
 410 int
 411 mm_key_verify(Key *key, u_char *sig, u_int siglen, u_char *data, u_int datalen)
 412 {
 413         Buffer m;
 414         u_char *blob;
 415         u_int len;
 416         int verified = 0;
 417
 418         debug3("%s entering", __func__);
 419
 420         /* Convert the key to a blob and the pass it over */
 421         if (!key_to_blob(key, &blob, &len))
 422                 return (0);
 423
 424         buffer_init(&m);
 425         buffer_put_string(&m, blob, len);
 426         buffer_put_string(&m, sig, siglen);
 427         buffer_put_string(&m, data, datalen);
 428         xfree(blob);
 429
 430         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_KEYVERIFY, &m);
 431
 432         debug3("%s: waiting for MONITOR_ANS_KEYVERIFY", __func__);
 433         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_KEYVERIFY, &m);
 434
 435         verified = buffer_get_int(&m);
 436
 437         buffer_free(&m);
 438
 439         return (verified);
 440 }
 441
 442 /* Export key state after authentication */
 443 Newkeys *
 444 mm_newkeys_from_blob(u_char *blob, int blen)
 445 {
 446         Buffer b;
 447         u_int len;
 448         Newkeys *newkey = NULL;
 449         Enc *enc;
 450         Mac *mac;
 451         Comp *comp;
 452
 453         debug3("%s: %p(%d)", __func__, blob, blen);
 454 #ifdef DEBUG_PK
 455         dump_base64(stderr, blob, blen);
 456 #endif
 457         buffer_init(&b);
 458         buffer_append(&b, blob, blen);
 459
 460         newkey = xmalloc(sizeof(*newkey));
 461         enc = &newkey->enc;
 462         mac = &newkey->mac;
 463         comp = &newkey->comp;
 464
 465         /* Enc structure */
 466         enc->name = buffer_get_string(&b, NULL);
 467         buffer_get(&b, &enc->cipher, sizeof(enc->cipher));
 468         enc->enabled = buffer_get_int(&b);
 469         enc->block_size = buffer_get_int(&b);
 470         enc->key = buffer_get_string(&b, &enc->key_len);
 471         enc->iv = buffer_get_string(&b, &len);
 472         if (len != enc->block_size)
 473                 fatal("%s: bad ivlen: expected %u != %u", __func__,
 474                     enc->block_size, len);
 475
 476         if (enc->name == NULL || cipher_by_name(enc->name) != enc->cipher)
 477                 fatal("%s: bad cipher name %s or pointer %p", __func__,
 478                     enc->name, enc->cipher);
 479
 480         /* Mac structure */
 481         mac->name = buffer_get_string(&b, NULL);
 482         if (mac->name == NULL || mac_setup(mac, mac->name) == -1)
 483                 fatal("%s: can not setup mac %s", __func__, mac->name);
 484         mac->enabled = buffer_get_int(&b);
 485         mac->key = buffer_get_string(&b, &len);
 486         if (len > mac->key_len)
 487                 fatal("%s: bad mac key length: %u > %d", __func__, len,
 488                     mac->key_len);
 489         mac->key_len = len;
 490
 491         /* Comp structure */
 492         comp->type = buffer_get_int(&b);
 493         comp->enabled = buffer_get_int(&b);
 494         comp->name = buffer_get_string(&b, NULL);
 495
 496         len = buffer_len(&b);
 497         if (len != 0)
 498                 error("newkeys_from_blob: remaining bytes in blob %u", len);
 499         buffer_free(&b);
 500         return (newkey);
 501 }
 502
 503 int
 504 mm_newkeys_to_blob(int mode, u_char **blobp, u_int *lenp)
 505 {
 506         Buffer b;
 507         int len;
 508         Enc *enc;
 509         Mac *mac;
 510         Comp *comp;
 511         Newkeys *newkey = newkeys[mode];
 512
 513         debug3("%s: converting %p", __func__, newkey);
 514
 515         if (newkey == NULL) {
 516                 error("%s: newkey == NULL", __func__);
 517                 return 0;
 518         }
 519         enc = &newkey->enc;
 520         mac = &newkey->mac;
 521         comp = &newkey->comp;
 522
 523         buffer_init(&b);
 524         /* Enc structure */
 525         buffer_put_cstring(&b, enc->name);
 526         /* The cipher struct is constant and shared, you export pointer */
 527         buffer_append(&b, &enc->cipher, sizeof(enc->cipher));
 528         buffer_put_int(&b, enc->enabled);
 529         buffer_put_int(&b, enc->block_size);
 530         buffer_put_string(&b, enc->key, enc->key_len);
 531         packet_get_keyiv(mode, enc->iv, enc->block_size);
 532         buffer_put_string(&b, enc->iv, enc->block_size);
 533
 534         /* Mac structure */
 535         buffer_put_cstring(&b, mac->name);
 536         buffer_put_int(&b, mac->enabled);
 537         buffer_put_string(&b, mac->key, mac->key_len);
 538
 539         /* Comp structure */
 540         buffer_put_int(&b, comp->type);
 541         buffer_put_int(&b, comp->enabled);
 542         buffer_put_cstring(&b, comp->name);
 543
 544         len = buffer_len(&b);
 545         if (lenp != NULL)
 546                 *lenp = len;
 547         if (blobp != NULL) {
 548                 *blobp = xmalloc(len);
 549                 memcpy(*blobp, buffer_ptr(&b), len);
 550         }
 551         memset(buffer_ptr(&b), 0, len);
 552         buffer_free(&b);
 553         return len;
 554 }
 555
 556 static void
 557 mm_send_kex(Buffer *m, Kex *kex)
 558 {
 559         buffer_put_string(m, kex->session_id, kex->session_id_len);
 560         buffer_put_int(m, kex->we_need);
 561         buffer_put_int(m, kex->hostkey_type);
 562         buffer_put_int(m, kex->kex_type);
 563         buffer_put_string(m, buffer_ptr(&kex->my), buffer_len(&kex->my));
 564         buffer_put_string(m, buffer_ptr(&kex->peer), buffer_len(&kex->peer));
 565         buffer_put_int(m, kex->flags);
 566         buffer_put_cstring(m, kex->client_version_string);
 567         buffer_put_cstring(m, kex->server_version_string);
 568 }
 569
 570 void
 571 mm_send_keystate(struct monitor *monitor)
 572 {
 573         Buffer m;
 574         u_char *blob, *p;
 575         u_int bloblen, plen;
 576         u_int32_t seqnr, packets;
 577         u_int64_t blocks, bytes;
 578
 579         buffer_init(&m);
 580
 581         if (!compat20) {
 582                 u_char iv[24];
 583                 u_char *key;
 584                 u_int ivlen, keylen;
 585
 586                 buffer_put_int(&m, packet_get_protocol_flags());
 587
 588                 buffer_put_int(&m, packet_get_ssh1_cipher());
 589
 590                 debug3("%s: Sending ssh1 KEY+IV", __func__);
 591                 keylen = packet_get_encryption_key(NULL);
 592                 key = xmalloc(keylen+1);        /* add 1 if keylen == 0 */
 593                 keylen = packet_get_encryption_key(key);
 594                 buffer_put_string(&m, key, keylen);
 595                 memset(key, 0, keylen);
 596                 xfree(key);
 597
 598                 ivlen = packet_get_keyiv_len(MODE_OUT);
 599                 packet_get_keyiv(MODE_OUT, iv, ivlen);
 600                 buffer_put_string(&m, iv, ivlen);
 601                 ivlen = packet_get_keyiv_len(MODE_OUT);
 602                 packet_get_keyiv(MODE_IN, iv, ivlen);
 603                 buffer_put_string(&m, iv, ivlen);
 604                 goto skip;
 605         } else {
 606                 /* Kex for rekeying */
 607                 mm_send_kex(&m, *monitor->m_pkex);
 608         }
 609
 610         debug3("%s: Sending new keys: %p %p",
 611             __func__, newkeys[MODE_OUT], newkeys[MODE_IN]);
 612
 613         /* Keys from Kex */
 614         if (!mm_newkeys_to_blob(MODE_OUT, &blob, &bloblen))
 615                 fatal("%s: conversion of newkeys failed", __func__);
 616
 617         buffer_put_string(&m, blob, bloblen);
 618         xfree(blob);
 619
 620         if (!mm_newkeys_to_blob(MODE_IN, &blob, &bloblen))
 621                 fatal("%s: conversion of newkeys failed", __func__);
 622
 623         buffer_put_string(&m, blob, bloblen);
 624         xfree(blob);
 625
 626         packet_get_state(MODE_OUT, &seqnr, &blocks, &packets, &bytes);
 627         buffer_put_int(&m, seqnr);
 628         buffer_put_int64(&m, blocks);
 629         buffer_put_int(&m, packets);
 630         buffer_put_int64(&m, bytes);
 631         packet_get_state(MODE_IN, &seqnr, &blocks, &packets, &bytes);
 632         buffer_put_int(&m, seqnr);
 633         buffer_put_int64(&m, blocks);
 634         buffer_put_int(&m, packets);
 635         buffer_put_int64(&m, bytes);
 636
 637         debug3("%s: New keys have been sent", __func__);
 638  skip:
 639         /* More key context */
 640         plen = packet_get_keycontext(MODE_OUT, NULL);
 641         p = xmalloc(plen+1);
 642         packet_get_keycontext(MODE_OUT, p);
 643         buffer_put_string(&m, p, plen);
 644         xfree(p);
 645
 646         plen = packet_get_keycontext(MODE_IN, NULL);
 647         p = xmalloc(plen+1);
 648         packet_get_keycontext(MODE_IN, p);
 649         buffer_put_string(&m, p, plen);
 650         xfree(p);
 651
 652         /* Compression state */
 653         debug3("%s: Sending compression state", __func__);
 654         buffer_put_string(&m, &outgoing_stream, sizeof(outgoing_stream));
 655         buffer_put_string(&m, &incoming_stream, sizeof(incoming_stream));
 656
 657         /* Network I/O buffers */
 658         buffer_put_string(&m, buffer_ptr(&input), buffer_len(&input));
 659         buffer_put_string(&m, buffer_ptr(&output), buffer_len(&output));
 660
 661         mm_request_send(monitor->m_recvfd, MONITOR_REQ_KEYEXPORT, &m);
 662         debug3("%s: Finished sending state", __func__);
 663
 664         buffer_free(&m);
 665 }
 666
 667 int
 668 mm_pty_allocate(int *ptyfd, int *ttyfd, char *namebuf, size_t namebuflen)
 669 {
 670         Buffer m;
 671         char *p, *msg;
 672         int success = 0, tmp1 = -1, tmp2 = -1;
 673
 674         /* Kludge: ensure there are fds free to receive the pty/tty */
 675         if ((tmp1 = dup(pmonitor->m_recvfd)) == -1 ||
 676             (tmp2 = dup(pmonitor->m_recvfd)) == -1) {
 677                 error("%s: cannot allocate fds for pty", __func__);
 678                 if (tmp1 > 0)
 679                         close(tmp1);
 680                 if (tmp2 > 0)
 681                         close(tmp2);
 682                 return 0;
 683         }
 684         close(tmp1);
 685         close(tmp2);
 686
 687         buffer_init(&m);
 688         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTY, &m);
 689
 690         debug3("%s: waiting for MONITOR_ANS_PTY", __func__);
 691         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PTY, &m);
 692
 693         success = buffer_get_int(&m);
 694         if (success == 0) {
 695                 debug3("%s: pty alloc failed", __func__);
 696                 buffer_free(&m);
 697                 return (0);
 698         }
 699         p = buffer_get_string(&m, NULL);
 700         msg = buffer_get_string(&m, NULL);
 701         buffer_free(&m);
 702
 703         strlcpy(namebuf, p, namebuflen); /* Possible truncation */
 704         xfree(p);
 705
 706         buffer_append(&loginmsg, msg, strlen(msg));
 707         xfree(msg);
 708
 709         if ((*ptyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1 ||
 710             (*ttyfd = mm_receive_fd(pmonitor->m_recvfd)) == -1)
 711                 fatal("%s: receive fds failed", __func__);
 712
 713         /* Success */
 714         return (1);
 715 }
 716
 717 void
 718 mm_session_pty_cleanup2(Session *s)
 719 {
 720         Buffer m;
 721
 722         if (s->ttyfd == -1)
 723                 return;
 724         buffer_init(&m);
 725         buffer_put_cstring(&m, s->tty);
 726         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PTYCLEANUP, &m);
 727         buffer_free(&m);
 728
 729         /* closed dup'ed master */
 730         if (s->ptymaster != -1 && close(s->ptymaster) < 0)
 731                 error("close(s->ptymaster/%d): %s",
 732                     s->ptymaster, strerror(errno));
 733
 734         /* unlink pty from session */
 735         s->ttyfd = -1;
 736 }
 737
 738 #ifdef USE_PAM
 739 void
 740 mm_start_pam(Authctxt *authctxt)
 741 {
 742         Buffer m;
 743
 744         debug3("%s entering", __func__);
 745         if (!options.use_pam)
 746                 fatal("UsePAM=no, but ended up in %s anyway", __func__);
 747
 748         buffer_init(&m);
 749         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_START, &m);
 750
 751         buffer_free(&m);
 752 }
 753
 754 u_int
 755 mm_do_pam_account(void)
 756 {
 757         Buffer m;
 758         u_int ret;
 759         char *msg;
 760
 761         debug3("%s entering", __func__);
 762         if (!options.use_pam)
 763                 fatal("UsePAM=no, but ended up in %s anyway", __func__);
 764
 765         buffer_init(&m);
 766         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_ACCOUNT, &m);
 767
 768         mm_request_receive_expect(pmonitor->m_recvfd,
 769             MONITOR_ANS_PAM_ACCOUNT, &m);
 770         ret = buffer_get_int(&m);
 771         msg = buffer_get_string(&m, NULL);
 772         buffer_append(&loginmsg, msg, strlen(msg));
 773         xfree(msg);
 774
 775         buffer_free(&m);
 776
 777         debug3("%s returning %d", __func__, ret);
 778
 779         return (ret);
 780 }
 781
 782 void *
 783 mm_sshpam_init_ctx(Authctxt *authctxt)
 784 {
 785         Buffer m;
 786         int success;
 787
 788         debug3("%s", __func__);
 789         buffer_init(&m);
 790         buffer_put_cstring(&m, authctxt->user);
 791         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_INIT_CTX, &m);
 792         debug3("%s: waiting for MONITOR_ANS_PAM_INIT_CTX", __func__);
 793         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_INIT_CTX, &m);
 794         success = buffer_get_int(&m);
 795         if (success == 0) {
 796                 debug3("%s: pam_init_ctx failed", __func__);
 797                 buffer_free(&m);
 798                 return (NULL);
 799         }
 800         buffer_free(&m);
 801         return (authctxt);
 802 }
 803
 804 int
 805 mm_sshpam_query(void *ctx, char **name, char **info,
 806     u_int *num, char ***prompts, u_int **echo_on)
 807 {
 808         Buffer m;
 809         u_int i;
 810         int ret;
 811
 812         debug3("%s", __func__);
 813         buffer_init(&m);
 814         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_QUERY, &m);
 815         debug3("%s: waiting for MONITOR_ANS_PAM_QUERY", __func__);
 816         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_QUERY, &m);
 817         ret = buffer_get_int(&m);
 818         debug3("%s: pam_query returned %d", __func__, ret);
 819         *name = buffer_get_string(&m, NULL);
 820         *info = buffer_get_string(&m, NULL);
 821         *num = buffer_get_int(&m);
 822         if (*num > PAM_MAX_NUM_MSG)
 823                 fatal("%s: recieved %u PAM messages, expected <= %u",
 824                     __func__, *num, PAM_MAX_NUM_MSG);
 825         *prompts = xcalloc((*num + 1), sizeof(char *));
 826         *echo_on = xcalloc((*num + 1), sizeof(u_int));
 827         for (i = 0; i < *num; ++i) {
 828                 (*prompts)[i] = buffer_get_string(&m, NULL);
 829                 (*echo_on)[i] = buffer_get_int(&m);
 830         }
 831         buffer_free(&m);
 832         return (ret);
 833 }
 834
 835 int
 836 mm_sshpam_respond(void *ctx, u_int num, char **resp)
 837 {
 838         Buffer m;
 839         u_int i;
 840         int ret;
 841
 842         debug3("%s", __func__);
 843         buffer_init(&m);
 844         buffer_put_int(&m, num);
 845         for (i = 0; i < num; ++i)
 846                 buffer_put_cstring(&m, resp[i]);
 847         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_RESPOND, &m);
 848         debug3("%s: waiting for MONITOR_ANS_PAM_RESPOND", __func__);
 849         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_RESPOND, &m);
 850         ret = buffer_get_int(&m);
 851         debug3("%s: pam_respond returned %d", __func__, ret);
 852         buffer_free(&m);
 853         return (ret);
 854 }
 855
 856 void
 857 mm_sshpam_free_ctx(void *ctxtp)
 858 {
 859         Buffer m;
 860
 861         debug3("%s", __func__);
 862         buffer_init(&m);
 863         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_PAM_FREE_CTX, &m);
 864         debug3("%s: waiting for MONITOR_ANS_PAM_FREE_CTX", __func__);
 865         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_PAM_FREE_CTX, &m);
 866         buffer_free(&m);
 867 }
 868 #endif /* USE_PAM */
 869
 870 /* Request process termination */
 871
 872 void
 873 mm_terminate(void)
 874 {
 875         Buffer m;
 876
 877         buffer_init(&m);
 878         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_TERM, &m);
 879         buffer_free(&m);
 880 }
 881
 882 int
 883 mm_ssh1_session_key(BIGNUM *num)
 884 {
 885         int rsafail;
 886         Buffer m;
 887
 888         buffer_init(&m);
 889         buffer_put_bignum2(&m, num);
 890         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSKEY, &m);
 891
 892         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SESSKEY, &m);
 893
 894         rsafail = buffer_get_int(&m);
 895         buffer_get_bignum2(&m, num);
 896
 897         buffer_free(&m);
 898
 899         return (rsafail);
 900 }
 901
 902 static void
 903 mm_chall_setup(char **name, char **infotxt, u_int *numprompts,
 904     char ***prompts, u_int **echo_on)
 905 {
 906         *name = xstrdup("");
 907         *infotxt = xstrdup("");
 908         *numprompts = 1;
 909         *prompts = xcalloc(*numprompts, sizeof(char *));
 910         *echo_on = xcalloc(*numprompts, sizeof(u_int));
 911         (*echo_on)[0] = 0;
 912 }
 913
 914 int
 915 mm_bsdauth_query(void *ctx, char **name, char **infotxt,
 916    u_int *numprompts, char ***prompts, u_int **echo_on)
 917 {
 918         Buffer m;
 919         u_int success;
 920         char *challenge;
 921
 922         debug3("%s: entering", __func__);
 923
 924         buffer_init(&m);
 925         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHQUERY, &m);
 926
 927         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_BSDAUTHQUERY,
 928             &m);
 929         success = buffer_get_int(&m);
 930         if (success == 0) {
 931                 debug3("%s: no challenge", __func__);
 932                 buffer_free(&m);
 933                 return (-1);
 934         }
 935
 936         /* Get the challenge, and format the response */
 937         challenge  = buffer_get_string(&m, NULL);
 938         buffer_free(&m);
 939
 940         mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
 941         (*prompts)[0] = challenge;
 942
 943         debug3("%s: received challenge: %s", __func__, challenge);
 944
 945         return (0);
 946 }
 947
 948 int
 949 mm_bsdauth_respond(void *ctx, u_int numresponses, char **responses)
 950 {
 951         Buffer m;
 952         int authok;
 953
 954         debug3("%s: entering", __func__);
 955         if (numresponses != 1)
 956                 return (-1);
 957
 958         buffer_init(&m);
 959         buffer_put_cstring(&m, responses[0]);
 960         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_BSDAUTHRESPOND, &m);
 961
 962         mm_request_receive_expect(pmonitor->m_recvfd,
 963             MONITOR_ANS_BSDAUTHRESPOND, &m);
 964
 965         authok = buffer_get_int(&m);
 966         buffer_free(&m);
 967
 968         return ((authok == 0) ? -1 : 0);
 969 }
 970
 971 #ifdef SKEY
 972 int
 973 mm_skey_query(void *ctx, char **name, char **infotxt,
 974    u_int *numprompts, char ***prompts, u_int **echo_on)
 975 {
 976         Buffer m;
 977         u_int success;
 978         char *challenge;
 979
 980         debug3("%s: entering", __func__);
 981
 982         buffer_init(&m);
 983         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYQUERY, &m);
 984
 985         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_SKEYQUERY,
 986             &m);
 987         success = buffer_get_int(&m);
 988         if (success == 0) {
 989                 debug3("%s: no challenge", __func__);
 990                 buffer_free(&m);
 991                 return (-1);
 992         }
 993
 994         /* Get the challenge, and format the response */
 995         challenge  = buffer_get_string(&m, NULL);
 996         buffer_free(&m);
 997
 998         debug3("%s: received challenge: %s", __func__, challenge);
 999
1000         mm_chall_setup(name, infotxt, numprompts, prompts, echo_on);
1001
1002         xasprintf(*prompts, "%s%s", challenge, SKEY_PROMPT);
1003         xfree(challenge);
1004
1005         return (0);
1006 }
1007
1008 int
1009 mm_skey_respond(void *ctx, u_int numresponses, char **responses)
1010 {
1011         Buffer m;
1012         int authok;
1013
1014         debug3("%s: entering", __func__);
1015         if (numresponses != 1)
1016                 return (-1);
1017
1018         buffer_init(&m);
1019         buffer_put_cstring(&m, responses[0]);
1020         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SKEYRESPOND, &m);
1021
1022         mm_request_receive_expect(pmonitor->m_recvfd,
1023             MONITOR_ANS_SKEYRESPOND, &m);
1024
1025         authok = buffer_get_int(&m);
1026         buffer_free(&m);
1027
1028         return ((authok == 0) ? -1 : 0);
1029 }
1030 #endif /* SKEY */
1031
1032 void
1033 mm_ssh1_session_id(u_char session_id[16])
1034 {
1035         Buffer m;
1036         int i;
1037
1038         debug3("%s entering", __func__);
1039
1040         buffer_init(&m);
1041         for (i = 0; i < 16; i++)
1042                 buffer_put_char(&m, session_id[i]);
1043
1044         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_SESSID, &m);
1045         buffer_free(&m);
1046 }
1047
1048 int
1049 mm_auth_rsa_key_allowed(struct passwd *pw, BIGNUM *client_n, Key **rkey)
1050 {
1051         Buffer m;
1052         Key *key;
1053         u_char *blob;
1054         u_int blen;
1055         int allowed = 0, have_forced = 0;
1056
1057         debug3("%s entering", __func__);
1058
1059         buffer_init(&m);
1060         buffer_put_bignum2(&m, client_n);
1061
1062         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSAKEYALLOWED, &m);
1063         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSAKEYALLOWED, &m);
1064
1065         allowed = buffer_get_int(&m);
1066
1067         /* fake forced command */
1068         auth_clear_options();
1069         have_forced = buffer_get_int(&m);
1070         forced_command = have_forced ? xstrdup("true") : NULL;
1071
1072         if (allowed && rkey != NULL) {
1073                 blob = buffer_get_string(&m, &blen);
1074                 if ((key = key_from_blob(blob, blen)) == NULL)
1075                         fatal("%s: key_from_blob failed", __func__);
1076                 *rkey = key;
1077                 xfree(blob);
1078         }
1079         mm_send_debug(&m);
1080         buffer_free(&m);
1081
1082         return (allowed);
1083 }
1084
1085 BIGNUM *
1086 mm_auth_rsa_generate_challenge(Key *key)
1087 {
1088         Buffer m;
1089         BIGNUM *challenge;
1090         u_char *blob;
1091         u_int blen;
1092
1093         debug3("%s entering", __func__);
1094
1095         if ((challenge = BN_new()) == NULL)
1096                 fatal("%s: BN_new failed", __func__);
1097
1098         key->type = KEY_RSA;    /* XXX cheat for key_to_blob */
1099         if (key_to_blob(key, &blob, &blen) == 0)
1100                 fatal("%s: key_to_blob failed", __func__);
1101         key->type = KEY_RSA1;
1102
1103         buffer_init(&m);
1104         buffer_put_string(&m, blob, blen);
1105         xfree(blob);
1106
1107         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSACHALLENGE, &m);
1108         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSACHALLENGE, &m);
1109
1110         buffer_get_bignum2(&m, challenge);
1111         buffer_free(&m);
1112
1113         return (challenge);
1114 }
1115
1116 int
1117 mm_auth_rsa_verify_response(Key *key, BIGNUM *p, u_char response[16])
1118 {
1119         Buffer m;
1120         u_char *blob;
1121         u_int blen;
1122         int success = 0;
1123
1124         debug3("%s entering", __func__);
1125
1126         key->type = KEY_RSA;    /* XXX cheat for key_to_blob */
1127         if (key_to_blob(key, &blob, &blen) == 0)
1128                 fatal("%s: key_to_blob failed", __func__);
1129         key->type = KEY_RSA1;
1130
1131         buffer_init(&m);
1132         buffer_put_string(&m, blob, blen);
1133         buffer_put_string(&m, response, 16);
1134         xfree(blob);
1135
1136         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_RSARESPONSE, &m);
1137         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_RSARESPONSE, &m);
1138
1139         success = buffer_get_int(&m);
1140         buffer_free(&m);
1141
1142         return (success);
1143 }
1144
1145 #ifdef SSH_AUDIT_EVENTS
1146 void
1147 mm_audit_event(ssh_audit_event_t event)
1148 {
1149         Buffer m;
1150
1151         debug3("%s entering", __func__);
1152
1153         buffer_init(&m);
1154         buffer_put_int(&m, event);
1155
1156         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_EVENT, &m);
1157         buffer_free(&m);
1158 }
1159
1160 void
1161 mm_audit_run_command(const char *command)
1162 {
1163         Buffer m;
1164
1165         debug3("%s entering command %s", __func__, command);
1166
1167         buffer_init(&m);
1168         buffer_put_cstring(&m, command);
1169
1170         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_AUDIT_COMMAND, &m);
1171         buffer_free(&m);
1172 }
1173 #endif /* SSH_AUDIT_EVENTS */
1174
1175 #ifdef GSSAPI
1176 OM_uint32
1177 mm_ssh_gssapi_server_ctx(Gssctxt **ctx, gss_OID goid)
1178 {
1179         Buffer m;
1180         OM_uint32 major;
1181
1182         /* Client doesn't get to see the context */
1183         *ctx = NULL;
1184
1185         buffer_init(&m);
1186         buffer_put_string(&m, goid->elements, goid->length);
1187
1188         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSETUP, &m);
1189         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSETUP, &m);
1190
1191         major = buffer_get_int(&m);
1192
1193         buffer_free(&m);
1194         return (major);
1195 }
1196
1197 OM_uint32
1198 mm_ssh_gssapi_accept_ctx(Gssctxt *ctx, gss_buffer_desc *in,
1199     gss_buffer_desc *out, OM_uint32 *flags)
1200 {
1201         Buffer m;
1202         OM_uint32 major;
1203         u_int len;
1204
1205         buffer_init(&m);
1206         buffer_put_string(&m, in->value, in->length);
1207
1208         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSSTEP, &m);
1209         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSSTEP, &m);
1210
1211         major = buffer_get_int(&m);
1212         out->value = buffer_get_string(&m, &len);
1213         out->length = len;
1214         if (flags)
1215                 *flags = buffer_get_int(&m);
1216
1217         buffer_free(&m);
1218
1219         return (major);
1220 }
1221
1222 OM_uint32
1223 mm_ssh_gssapi_checkmic(Gssctxt *ctx, gss_buffer_t gssbuf, gss_buffer_t gssmic)
1224 {
1225         Buffer m;
1226         OM_uint32 major;
1227
1228         buffer_init(&m);
1229         buffer_put_string(&m, gssbuf->value, gssbuf->length);
1230         buffer_put_string(&m, gssmic->value, gssmic->length);
1231
1232         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSCHECKMIC, &m);
1233         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSCHECKMIC,
1234             &m);
1235
1236         major = buffer_get_int(&m);
1237         buffer_free(&m);
1238         return(major);
1239 }
1240
1241 int
1242 mm_ssh_gssapi_userok(char *user)
1243 {
1244         Buffer m;
1245         int authenticated = 0;
1246
1247         buffer_init(&m);
1248
1249         mm_request_send(pmonitor->m_recvfd, MONITOR_REQ_GSSUSEROK, &m);
1250         mm_request_receive_expect(pmonitor->m_recvfd, MONITOR_ANS_GSSUSEROK,
1251                                   &m);
1252
1253         authenticated = buffer_get_int(&m);
1254
1255         buffer_free(&m);
1256         debug3("%s: user %sauthenticated",__func__, authenticated ? "" : "not ");
1257         return (authenticated);
1258 }
1259 #endif /* GSSAPI */
1260
1261 #ifdef JPAKE
1262 void
1263 mm_auth2_jpake_get_pwdata(Authctxt *authctxt, BIGNUM **s,
1264     char **hash_scheme, char **salt)
1265 {
1266         Buffer m;
1267
1268         debug3("%s entering", __func__);
1269
1270         buffer_init(&m);
1271         mm_request_send(pmonitor->m_recvfd,
1272             MONITOR_REQ_JPAKE_GET_PWDATA, &m);
1273
1274         debug3("%s: waiting for MONITOR_ANS_JPAKE_GET_PWDATA", __func__);
1275         mm_request_receive_expect(pmonitor->m_recvfd,
1276             MONITOR_ANS_JPAKE_GET_PWDATA, &m);
1277
1278         *hash_scheme = buffer_get_string(&m, NULL);
1279         *salt = buffer_get_string(&m, NULL);
1280
1281         buffer_free(&m);
1282 }
1283
1284 void
1285 mm_jpake_step1(struct jpake_group *grp,
1286     u_char **id, u_int *id_len,
1287     BIGNUM **priv1, BIGNUM **priv2, BIGNUM **g_priv1, BIGNUM **g_priv2,
1288     u_char **priv1_proof, u_int *priv1_proof_len,
1289     u_char **priv2_proof, u_int *priv2_proof_len)
1290 {
1291         Buffer m;
1292
1293         debug3("%s entering", __func__);
1294
1295         buffer_init(&m);
1296         mm_request_send(pmonitor->m_recvfd,
1297             MONITOR_REQ_JPAKE_STEP1, &m);
1298
1299         debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP1", __func__);
1300         mm_request_receive_expect(pmonitor->m_recvfd,
1301             MONITOR_ANS_JPAKE_STEP1, &m);
1302
1303         if ((*priv1 = BN_new()) == NULL ||
1304             (*priv2 = BN_new()) == NULL ||
1305             (*g_priv1 = BN_new()) == NULL ||
1306             (*g_priv2 = BN_new()) == NULL)
1307                 fatal("%s: BN_new", __func__);
1308
1309         *id = buffer_get_string(&m, id_len);
1310         /* priv1 and priv2 are, well, private */
1311         buffer_get_bignum2(&m, *g_priv1);
1312         buffer_get_bignum2(&m, *g_priv2);
1313         *priv1_proof = buffer_get_string(&m, priv1_proof_len);
1314         *priv2_proof = buffer_get_string(&m, priv2_proof_len);
1315
1316         buffer_free(&m);
1317 }
1318
1319 void
1320 mm_jpake_step2(struct jpake_group *grp, BIGNUM *s,
1321     BIGNUM *mypub1, BIGNUM *theirpub1, BIGNUM *theirpub2, BIGNUM *mypriv2,
1322     const u_char *theirid, u_int theirid_len,
1323     const u_char *myid, u_int myid_len,
1324     const u_char *theirpub1_proof, u_int theirpub1_proof_len,
1325     const u_char *theirpub2_proof, u_int theirpub2_proof_len,
1326     BIGNUM **newpub,
1327     u_char **newpub_exponent_proof, u_int *newpub_exponent_proof_len)
1328 {
1329         Buffer m;
1330
1331         debug3("%s entering", __func__);
1332
1333         buffer_init(&m);
1334         /* monitor already has all bignums except theirpub1, theirpub2 */
1335         buffer_put_bignum2(&m, theirpub1);
1336         buffer_put_bignum2(&m, theirpub2);
1337         /* monitor already knows our id */
1338         buffer_put_string(&m, theirid, theirid_len);
1339         buffer_put_string(&m, theirpub1_proof, theirpub1_proof_len);
1340         buffer_put_string(&m, theirpub2_proof, theirpub2_proof_len);
1341
1342         mm_request_send(pmonitor->m_recvfd,
1343             MONITOR_REQ_JPAKE_STEP2, &m);
1344
1345         debug3("%s: waiting for MONITOR_ANS_JPAKE_STEP2", __func__);
1346         mm_request_receive_expect(pmonitor->m_recvfd,
1347             MONITOR_ANS_JPAKE_STEP2, &m);
1348
1349         if ((*newpub = BN_new()) == NULL)
1350                 fatal("%s: BN_new", __func__);
1351
1352         buffer_get_bignum2(&m, *newpub);
1353         *newpub_exponent_proof = buffer_get_string(&m,
1354             newpub_exponent_proof_len);
1355
1356         buffer_free(&m);
1357 }
1358
1359 void
1360 mm_jpake_key_confirm(struct jpake_group *grp, BIGNUM *s, BIGNUM *step2_val,
1361     BIGNUM *mypriv2, BIGNUM *mypub1, BIGNUM *mypub2,
1362     BIGNUM *theirpub1, BIGNUM *theirpub2,
1363     const u_char *my_id, u_int my_id_len,
1364     const u_char *their_id, u_int their_id_len,
1365     const u_char *sess_id, u_int sess_id_len,
1366     const u_char *theirpriv2_s_proof, u_int theirpriv2_s_proof_len,
1367     BIGNUM **k,
1368     u_char **confirm_hash, u_int *confirm_hash_len)
1369 {
1370         Buffer m;
1371
1372         debug3("%s entering", __func__);
1373
1374         buffer_init(&m);
1375         /* monitor already has all bignums except step2_val */
1376         buffer_put_bignum2(&m, step2_val);
1377         /* monitor already knows all the ids */
1378         buffer_put_string(&m, theirpriv2_s_proof, theirpriv2_s_proof_len);
1379
1380         mm_request_send(pmonitor->m_recvfd,
1381             MONITOR_REQ_JPAKE_KEY_CONFIRM, &m);
1382
1383         debug3("%s: waiting for MONITOR_ANS_JPAKE_KEY_CONFIRM", __func__);
1384         mm_request_receive_expect(pmonitor->m_recvfd,
1385             MONITOR_ANS_JPAKE_KEY_CONFIRM, &m);
1386
1387         /* 'k' is sensitive and stays in the monitor */
1388         *confirm_hash = buffer_get_string(&m, confirm_hash_len);
1389
1390         buffer_free(&m);
1391 }
1392
1393 int
1394 mm_jpake_check_confirm(const BIGNUM *k,
1395     const u_char *peer_id, u_int peer_id_len,
1396     const u_char *sess_id, u_int sess_id_len,
1397     const u_char *peer_confirm_hash, u_int peer_confirm_hash_len)
1398 {
1399         Buffer m;
1400         int success = 0;
1401
1402         debug3("%s entering", __func__);
1403
1404         buffer_init(&m);
1405         /* k is dummy in slave, ignored */
1406         /* monitor knows all the ids */
1407         buffer_put_string(&m, peer_confirm_hash, peer_confirm_hash_len);
1408         mm_request_send(pmonitor->m_recvfd,
1409             MONITOR_REQ_JPAKE_CHECK_CONFIRM, &m);
1410
1411         debug3("%s: waiting for MONITOR_ANS_JPAKE_CHECK_CONFIRM", __func__);
1412         mm_request_receive_expect(pmonitor->m_recvfd,
1413             MONITOR_ANS_JPAKE_CHECK_CONFIRM, &m);
1414
1415         success = buffer_get_int(&m);
1416         buffer_free(&m);
1417
1418         debug3("%s: success = %d", __func__, success);
1419         return success;
1420 }
1421 #endif /* JPAKE */