usr.sbin/keyserv/keyserv.c

   1 /*
   2  * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
   3  * unrestricted use provided that this legend is included on all tape
   4  * media and as a part of the software program in whole or part.  Users
   5  * may copy or modify Sun RPC without charge, but are not authorized
   6  * to license or distribute it to anyone else except as part of a product or
   7  * program developed by the user.
   8  *
   9  * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
  10  * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
  11  * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
  12  *
  13  * Sun RPC is provided with no support and without any obligation on the
  14  * part of Sun Microsystems, Inc. to assist in its use, correction,
  15  * modification or enhancement.
  16  *
  17  * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
  18  * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
  19  * OR ANY PART THEREOF.
  20  *
  21  * In no event will Sun Microsystems, Inc. be liable for any lost revenue
  22  * or profits or other special, indirect and consequential damages, even if
  23  * Sun has been advised of the possibility of such damages.
  24  *
  25  * Sun Microsystems, Inc.
  26  * 2550 Garcia Avenue
  27  * Mountain View, California  94043
  28  *
  29  * @(#)keyserv.c        1.15    94/04/25 SMI
  30  * $FreeBSD: src/usr.sbin/keyserv/keyserv.c,v 1.3.2.2 2001/07/19 10:58:22 roam Exp $
  31  * $DragonFly: src/usr.sbin/keyserv/keyserv.c,v 1.6 2004/12/18 22:48:03 swildner Exp $
  32  */
  33
  34 /*
  35  * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc.
  36  */
  37
  38 /*
  39  * Keyserver
  40  * Store secret keys per uid. Do public key encryption and decryption
  41  * operations. Generate "random" keys.
  42  * Do not talk to anything but a local root
  43  * process on the local transport only
  44  */
  45
  46 #include <err.h>
  47 #include <pwd.h>
  48 #include <stdio.h>
  49 #include <stdlib.h>
  50 #include <string.h>
  51 #include <unistd.h>
  52 #include <sys/stat.h>
  53 #include <sys/types.h>
  54 #include <rpc/rpc.h>
  55 #include <rpc/pmap_clnt.h>
  56 #include <sys/param.h>
  57 #include <sys/file.h>
  58 #include <rpc/des_crypt.h>
  59 #include <rpc/des.h>
  60 #include <rpc/key_prot.h>
  61 #include <rpcsvc/crypt.h>
  62 #include "keyserv.h"
  63
  64 #ifndef NGROUPS
  65 #define NGROUPS 16
  66 #endif
  67
  68 #ifndef KEYSERVSOCK
  69 #define KEYSERVSOCK "/var/run/keyservsock"
  70 #endif
  71
  72 static void randomize( des_block * );
  73 static void usage( void );
  74 static int getrootkey( des_block *, int );
  75 static int root_auth( SVCXPRT *, struct svc_req * );
  76
  77 #ifdef DEBUG
  78 static int debugging = 1;
  79 #else
  80 static int debugging = 0;
  81 #endif
  82
  83 static void keyprogram();
  84 static des_block masterkey;
  85 char *getenv();
  86 static char ROOTKEY[] = "/etc/.rootkey";
  87
  88 /*
  89  * Hack to allow the keyserver to use AUTH_DES (for authenticated
  90  * NIS+ calls, for example).  The only functions that get called
  91  * are key_encryptsession_pk, key_decryptsession_pk, and key_gendes.
  92  *
  93  * The approach is to have the keyserver fill in pointers to local
  94  * implementations of these functions, and to call those in key_call().
  95  */
  96
  97 extern cryptkeyres *(*__key_encryptsession_pk_LOCAL)();
  98 extern cryptkeyres *(*__key_decryptsession_pk_LOCAL)();
  99 extern des_block *(*__key_gendes_LOCAL)();
 100 extern int (*__des_crypt_LOCAL)();
 101
 102 cryptkeyres *key_encrypt_pk_2_svc_prog( uid_t, cryptkeyarg2 * );
 103 cryptkeyres *key_decrypt_pk_2_svc_prog( uid_t, cryptkeyarg2 * );
 104 des_block *key_gen_1_svc_prog( void *, struct svc_req * );
 105
 106 int
 107 main(int argc, char **argv)
 108 {
 109         int nflag = 0;
 110         int c;
 111         SVCXPRT *transp;
 112         int sock = RPC_ANYSOCK;
 113         int warn = 0;
 114         char *path = NULL;
 115
 116         __key_encryptsession_pk_LOCAL = &key_encrypt_pk_2_svc_prog;
 117         __key_decryptsession_pk_LOCAL = &key_decrypt_pk_2_svc_prog;
 118         __key_gendes_LOCAL = &key_gen_1_svc_prog;
 119
 120         while ((c = getopt(argc, argv, "ndDvp:")) != -1)
 121                 switch (c) {
 122                 case 'n':
 123                         nflag++;
 124                         break;
 125                 case 'd':
 126                         pk_nodefaultkeys();
 127                         break;
 128                 case 'D':
 129                         debugging = 1;
 130                         break;
 131                 case 'v':
 132                         warn = 1;
 133                         break;
 134                 case 'p':
 135                         path = optarg;
 136                         break;
 137                 default:
 138                         usage();
 139                 }
 140
 141         load_des(warn, path);
 142         __des_crypt_LOCAL = _my_crypt;
 143         if (svc_auth_reg(AUTH_DES, _svcauth_des) == -1)
 144                 errx(1, "failed to register AUTH_DES authenticator");
 145
 146         if (optind != argc) {
 147                 usage();
 148         }
 149
 150         /*
 151          * Initialize
 152          */
 153         umask(066);     /* paranoia */
 154         if (geteuid() != 0)
 155                 errx(1, "keyserv must be run as root");
 156         setmodulus(HEXMODULUS);
 157         getrootkey(&masterkey, nflag);
 158
 159
 160         /* Create services. */
 161
 162         pmap_unset(KEY_PROG, KEY_VERS);
 163         pmap_unset(KEY_PROG, KEY_VERS2);
 164         unlink(KEYSERVSOCK);
 165
 166         transp = svcudp_create(RPC_ANYSOCK);
 167         if (transp == NULL)
 168                 errx(1, "cannot create udp service");
 169         if (!svc_register(transp, KEY_PROG, KEY_VERS, keyprogram, IPPROTO_UDP))
 170                 errx(1, "unable to register (KEY_PROG, KEY_VERS, udp)");
 171         if (!svc_register(transp, KEY_PROG, KEY_VERS2, keyprogram, IPPROTO_UDP))
 172                 errx(1, "unable to register (KEY_PROG, KEY_VERS2, udp)");
 173
 174         transp = svctcp_create(RPC_ANYSOCK, 0, 0);
 175         if (transp == NULL)
 176                 errx(1, "cannot create tcp service");
 177         if (!svc_register(transp, KEY_PROG, KEY_VERS, keyprogram, IPPROTO_TCP))
 178                 errx(1, "unable to register (KEY_PROG, KEY_VERS, tcp)");
 179         if (!svc_register(transp, KEY_PROG, KEY_VERS2, keyprogram, IPPROTO_TCP))
 180                 errx(1, "unable to register (KEY_PROG, KEY_VERS2, tcp)");
 181
 182         transp = svcunix_create(sock, 0, 0, KEYSERVSOCK);
 183         chmod(KEYSERVSOCK, 0666);
 184         if (transp == NULL)
 185                 errx(1, "cannot create AF_UNIX service");
 186         if (!svc_register(transp, KEY_PROG, KEY_VERS, keyprogram, 0))
 187                 errx(1, "unable to register (KEY_PROG, KEY_VERS, unix)");
 188         if (!svc_register(transp, KEY_PROG, KEY_VERS2, keyprogram, 0))
 189                 errx(1, "unable to register (KEY_PROG, KEY_VERS2, unix)");
 190         if (!svc_register(transp, CRYPT_PROG, CRYPT_VERS, crypt_prog_1, 0))
 191                 errx(1, "unable to register (CRYPT_PROG, CRYPT_VERS, unix)");
 192
 193         if (!debugging) {
 194                 daemon(0,0);
 195         }
 196
 197         signal(SIGPIPE, SIG_IGN);
 198
 199         svc_run();
 200         abort();
 201         /* NOTREACHED */
 202 }
 203
 204 /*
 205  * In the event that we don't get a root password, we try to
 206  * randomize the master key the best we can
 207  */
 208 static void
 209 randomize(des_block *master)
 210 {
 211         int i;
 212         int seed;
 213         struct timeval tv;
 214         int shift;
 215
 216         seed = 0;
 217         for (i = 0; i < 1024; i++) {
 218                 gettimeofday(&tv, (struct timezone *) NULL);
 219                 shift = i % 8 * sizeof (int);
 220                 seed ^= (tv.tv_usec << shift) | (tv.tv_usec >> (32 - shift));
 221         }
 222 #ifdef KEYSERV_RANDOM
 223         srandom(seed);
 224         master->key.low = random();
 225         master->key.high = random();
 226         srandom(seed);
 227 #else
 228         /* use stupid dangerous bad rand() */
 229         srand(seed);
 230         master->key.low = rand();
 231         master->key.high = rand();
 232         srand(seed);
 233 #endif
 234 }
 235
 236 /*
 237  * Try to get root's secret key, by prompting if terminal is a tty, else trying
 238  * from standard input.
 239  * Returns 1 on success.
 240  */
 241 static int
 242 getrootkey(des_block *master, int prompt)
 243 {
 244         char *passwd;
 245         char name[MAXNETNAMELEN + 1];
 246         char secret[HEXKEYBYTES];
 247         key_netstarg netstore;
 248         int fd;
 249
 250         if (!prompt) {
 251                 /*
 252                  * Read secret key out of ROOTKEY
 253                  */
 254                 fd = open(ROOTKEY, O_RDONLY, 0);
 255                 if (fd < 0) {
 256                         randomize(master);
 257                         return (0);
 258                 }
 259                 if (read(fd, secret, HEXKEYBYTES) < HEXKEYBYTES) {
 260                         warnx("the key read from %s was too short", ROOTKEY);
 261                         close(fd);
 262                         return (0);
 263                 }
 264                 close(fd);
 265                 if (!getnetname(name)) {
 266                     warnx(
 267         "failed to generate host's netname when establishing root's key");
 268                     return (0);
 269                 }
 270                 memcpy(netstore.st_priv_key, secret, HEXKEYBYTES);
 271                 memset(netstore.st_pub_key, 0, HEXKEYBYTES);
 272                 netstore.st_netname = name;
 273                 if (pk_netput(0, &netstore) != KEY_SUCCESS) {
 274                     warnx("could not set root's key and netname");
 275                     return (0);
 276                 }
 277                 return (1);
 278         }
 279         /*
 280          * Decrypt yellow pages publickey entry to get secret key
 281          */
 282         passwd = getpass("root password:");
 283         passwd2des(passwd, (char *)master);
 284         getnetname(name);
 285         if (!getsecretkey(name, secret, passwd)) {
 286                 warnx("can't find %s's secret key", name);
 287                 return (0);
 288         }
 289         if (secret[0] == 0) {
 290                 warnx("password does not decrypt secret key for %s", name);
 291                 return (0);
 292         }
 293         pk_setkey(0, secret);
 294         /*
 295          * Store it for future use in $ROOTKEY, if possible
 296          */
 297         fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0);
 298         if (fd > 0) {
 299                 char newline = '\n';
 300
 301                 write(fd, secret, strlen(secret));
 302                 write(fd, &newline, sizeof (newline));
 303                 close(fd);
 304         }
 305         return (1);
 306 }
 307
 308 /*
 309  * Procedures to implement RPC service
 310  */
 311 char *
 312 strstatus(keystatus status)
 313 {
 314         switch (status) {
 315         case KEY_SUCCESS:
 316                 return ("KEY_SUCCESS");
 317         case KEY_NOSECRET:
 318                 return ("KEY_NOSECRET");
 319         case KEY_UNKNOWN:
 320                 return ("KEY_UNKNOWN");
 321         case KEY_SYSTEMERR:
 322                 return ("KEY_SYSTEMERR");
 323         default:
 324                 return ("(bad result code)");
 325         }
 326 }
 327
 328 keystatus *
 329 key_set_1_svc_prog(uid_t uid, keybuf key)
 330 {
 331         static keystatus status;
 332
 333         if (debugging) {
 334                 fprintf(stderr, "set(%ld, %.*s) = ", uid,
 335                                 (int) sizeof (keybuf), key);
 336         }
 337         status = pk_setkey(uid, key);
 338         if (debugging) {
 339                 fprintf(stderr, "%s\n", strstatus(status));
 340                 fflush(stderr);
 341         }
 342         return (&status);
 343 }
 344
 345 cryptkeyres *
 346 key_encrypt_pk_2_svc_prog(uid_t uid, cryptkeyarg2 *arg)
 347 {
 348         static cryptkeyres res;
 349
 350         if (debugging) {
 351                 fprintf(stderr, "encrypt(%ld, %s, %08x%08x) = ", uid,
 352                                 arg->remotename, arg->deskey.key.high,
 353                                 arg->deskey.key.low);
 354         }
 355         res.cryptkeyres_u.deskey = arg->deskey;
 356         res.status = pk_encrypt(uid, arg->remotename, &(arg->remotekey),
 357                                 &res.cryptkeyres_u.deskey);
 358         if (debugging) {
 359                 if (res.status == KEY_SUCCESS) {
 360                         fprintf(stderr, "%08x%08x\n",
 361                                         res.cryptkeyres_u.deskey.key.high,
 362                                         res.cryptkeyres_u.deskey.key.low);
 363                 } else {
 364                         fprintf(stderr, "%s\n", strstatus(res.status));
 365                 }
 366                 fflush(stderr);
 367         }
 368         return (&res);
 369 }
 370
 371 cryptkeyres *
 372 key_decrypt_pk_2_svc_prog(uid_t uid, cryptkeyarg2 *arg)
 373 {
 374         static cryptkeyres res;
 375
 376         if (debugging) {
 377                 fprintf(stderr, "decrypt(%ld, %s, %08x%08x) = ", uid,
 378                                 arg->remotename, arg->deskey.key.high,
 379                                 arg->deskey.key.low);
 380         }
 381         res.cryptkeyres_u.deskey = arg->deskey;
 382         res.status = pk_decrypt(uid, arg->remotename, &(arg->remotekey),
 383                                 &res.cryptkeyres_u.deskey);
 384         if (debugging) {
 385                 if (res.status == KEY_SUCCESS) {
 386                         fprintf(stderr, "%08x%08x\n",
 387                                         res.cryptkeyres_u.deskey.key.high,
 388                                         res.cryptkeyres_u.deskey.key.low);
 389                 } else {
 390                         fprintf(stderr, "%s\n", strstatus(res.status));
 391                 }
 392                 fflush(stderr);
 393         }
 394         return (&res);
 395 }
 396
 397 keystatus *
 398 key_net_put_2_svc_prog(uid_t uid, key_netstarg *arg)
 399 {
 400         static keystatus status;
 401
 402         if (debugging) {
 403                 fprintf(stderr, "net_put(%s, %.*s, %.*s) = ",
 404                         arg->st_netname, (int)sizeof (arg->st_pub_key),
 405                         arg->st_pub_key, (int)sizeof (arg->st_priv_key),
 406                         arg->st_priv_key);
 407         };
 408
 409         status = pk_netput(uid, arg);
 410
 411         if (debugging) {
 412                 fprintf(stderr, "%s\n", strstatus(status));
 413                 fflush(stderr);
 414         }
 415
 416         return (&status);
 417 }
 418
 419 key_netstres *
 420 key_net_get_2_svc_prog(uid_t uid, void *arg)
 421 {
 422         static key_netstres keynetname;
 423
 424         if (debugging)
 425                 fprintf(stderr, "net_get(%ld) = ", uid);
 426
 427         keynetname.status = pk_netget(uid, &keynetname.key_netstres_u.knet);
 428         if (debugging) {
 429                 if (keynetname.status == KEY_SUCCESS) {
 430                         fprintf(stderr, "<%s, %.*s, %.*s>\n",
 431                         keynetname.key_netstres_u.knet.st_netname,
 432                         (int)sizeof (keynetname.key_netstres_u.knet.st_pub_key),
 433                         keynetname.key_netstres_u.knet.st_pub_key,
 434                         (int)sizeof (keynetname.key_netstres_u.knet.st_priv_key),
 435                         keynetname.key_netstres_u.knet.st_priv_key);
 436                 } else {
 437                         fprintf(stderr, "NOT FOUND\n");
 438                 }
 439                 fflush(stderr);
 440         }
 441
 442         return (&keynetname);
 443
 444 }
 445
 446 cryptkeyres *
 447 key_get_conv_2_svc_prog(uid_t uid, keybuf arg)
 448 {
 449         static cryptkeyres  res;
 450
 451         if (debugging)
 452                 fprintf(stderr, "get_conv(%ld, %.*s) = ", uid,
 453                         (int)sizeof (arg), arg);
 454
 455
 456         res.status = pk_get_conv_key(uid, arg, &res);
 457
 458         if (debugging) {
 459                 if (res.status == KEY_SUCCESS) {
 460                         fprintf(stderr, "%08x%08x\n",
 461                                 res.cryptkeyres_u.deskey.key.high,
 462                                 res.cryptkeyres_u.deskey.key.low);
 463                 } else {
 464                         fprintf(stderr, "%s\n", strstatus(res.status));
 465                 }
 466                 fflush(stderr);
 467         }
 468         return (&res);
 469 }
 470
 471
 472 cryptkeyres *
 473 key_encrypt_1_svc_prog(uid_t uid, cryptkeyarg *arg)
 474 {
 475         static cryptkeyres res;
 476
 477         if (debugging) {
 478                 fprintf(stderr, "encrypt(%ld, %s, %08x%08x) = ", uid,
 479                                 arg->remotename, arg->deskey.key.high,
 480                                 arg->deskey.key.low);
 481         }
 482         res.cryptkeyres_u.deskey = arg->deskey;
 483         res.status = pk_encrypt(uid, arg->remotename, NULL,
 484                                 &res.cryptkeyres_u.deskey);
 485         if (debugging) {
 486                 if (res.status == KEY_SUCCESS) {
 487                         fprintf(stderr, "%08x%08x\n",
 488                                         res.cryptkeyres_u.deskey.key.high,
 489                                         res.cryptkeyres_u.deskey.key.low);
 490                 } else {
 491                         fprintf(stderr, "%s\n", strstatus(res.status));
 492                 }
 493                 fflush(stderr);
 494         }
 495         return (&res);
 496 }
 497
 498 cryptkeyres *
 499 key_decrypt_1_svc_prog(uid_t uid, cryptkeyarg *arg)
 500 {
 501         static cryptkeyres res;
 502
 503         if (debugging) {
 504                 fprintf(stderr, "decrypt(%ld, %s, %08x%08x) = ", uid,
 505                                 arg->remotename, arg->deskey.key.high,
 506                                 arg->deskey.key.low);
 507         }
 508         res.cryptkeyres_u.deskey = arg->deskey;
 509         res.status = pk_decrypt(uid, arg->remotename, NULL,
 510                                 &res.cryptkeyres_u.deskey);
 511         if (debugging) {
 512                 if (res.status == KEY_SUCCESS) {
 513                         fprintf(stderr, "%08x%08x\n",
 514                                         res.cryptkeyres_u.deskey.key.high,
 515                                         res.cryptkeyres_u.deskey.key.low);
 516                 } else {
 517                         fprintf(stderr, "%s\n", strstatus(res.status));
 518                 }
 519                 fflush(stderr);
 520         }
 521         return (&res);
 522 }
 523
 524 /* ARGSUSED */
 525 des_block *
 526 key_gen_1_svc_prog(void *v, struct svc_req *s)
 527 {
 528         struct timeval time;
 529         static des_block keygen;
 530         static des_block key;
 531
 532         gettimeofday(&time, (struct timezone *) NULL);
 533         keygen.key.high += (time.tv_sec ^ time.tv_usec);
 534         keygen.key.low += (time.tv_sec ^ time.tv_usec);
 535         ecb_crypt((char *)&masterkey, (char *)&keygen, sizeof (keygen),
 536                 DES_ENCRYPT | DES_HW);
 537         key = keygen;
 538         des_setparity((char *)&key);
 539         if (debugging) {
 540                 fprintf(stderr, "gen() = %08x%08x\n", key.key.high,
 541                                         key.key.low);
 542                 fflush(stderr);
 543         }
 544         return (&key);
 545 }
 546
 547 getcredres *
 548 key_getcred_1_svc_prog(uid_t uid, netnamestr *name)
 549 {
 550         static getcredres res;
 551         static u_int gids[NGROUPS];
 552         struct unixcred *cred;
 553
 554         cred = &res.getcredres_u.cred;
 555         cred->gids.gids_val = gids;
 556         if (!netname2user(*name, (uid_t *) &cred->uid, (gid_t *) &cred->gid,
 557                         (int *)&cred->gids.gids_len, (gid_t *)gids)) {
 558                 res.status = KEY_UNKNOWN;
 559         } else {
 560                 res.status = KEY_SUCCESS;
 561         }
 562         if (debugging) {
 563                 fprintf(stderr, "getcred(%s) = ", *name);
 564                 if (res.status == KEY_SUCCESS) {
 565                         fprintf(stderr, "uid=%d, gid=%d, grouplen=%d\n",
 566                                 cred->uid, cred->gid, cred->gids.gids_len);
 567                 } else {
 568                         fprintf(stderr, "%s\n", strstatus(res.status));
 569                 }
 570                 fflush(stderr);
 571         }
 572         return (&res);
 573 }
 574
 575 /*
 576  * RPC boilerplate
 577  */
 578 static void
 579 keyprogram(struct svc_req *rqstp, SVCXPRT *transp)
 580 {
 581         union {
 582                 keybuf key_set_1_arg;
 583                 cryptkeyarg key_encrypt_1_arg;
 584                 cryptkeyarg key_decrypt_1_arg;
 585                 netnamestr key_getcred_1_arg;
 586                 cryptkeyarg key_encrypt_2_arg;
 587                 cryptkeyarg key_decrypt_2_arg;
 588                 netnamestr key_getcred_2_arg;
 589                 cryptkeyarg2 key_encrypt_pk_2_arg;
 590                 cryptkeyarg2 key_decrypt_pk_2_arg;
 591                 key_netstarg key_net_put_2_arg;
 592                 netobj  key_get_conv_2_arg;
 593         } argument;
 594         char *result;
 595         bool_t(*xdr_argument)(), (*xdr_result)();
 596         char *(*local) ();
 597         uid_t uid = -1;
 598         int check_auth;
 599
 600         switch (rqstp->rq_proc) {
 601         case NULLPROC:
 602                 svc_sendreply(transp, xdr_void, (char *)NULL);
 603                 return;
 604
 605         case KEY_SET:
 606                 xdr_argument = xdr_keybuf;
 607                 xdr_result = xdr_int;
 608                 local = (char *(*)()) key_set_1_svc_prog;
 609                 check_auth = 1;
 610                 break;
 611
 612         case KEY_ENCRYPT:
 613                 xdr_argument = xdr_cryptkeyarg;
 614                 xdr_result = xdr_cryptkeyres;
 615                 local = (char *(*)()) key_encrypt_1_svc_prog;
 616                 check_auth = 1;
 617                 break;
 618
 619         case KEY_DECRYPT:
 620                 xdr_argument = xdr_cryptkeyarg;
 621                 xdr_result = xdr_cryptkeyres;
 622                 local = (char *(*)()) key_decrypt_1_svc_prog;
 623                 check_auth = 1;
 624                 break;
 625
 626         case KEY_GEN:
 627                 xdr_argument = xdr_void;
 628                 xdr_result = xdr_des_block;
 629                 local = (char *(*)()) key_gen_1_svc_prog;
 630                 check_auth = 0;
 631                 break;
 632
 633         case KEY_GETCRED:
 634                 xdr_argument = xdr_netnamestr;
 635                 xdr_result = xdr_getcredres;
 636                 local = (char *(*)()) key_getcred_1_svc_prog;
 637                 check_auth = 0;
 638                 break;
 639
 640         case KEY_ENCRYPT_PK:
 641                 xdr_argument = xdr_cryptkeyarg2;
 642                 xdr_result = xdr_cryptkeyres;
 643                 local = (char *(*)()) key_encrypt_pk_2_svc_prog;
 644                 check_auth = 1;
 645                 break;
 646
 647         case KEY_DECRYPT_PK:
 648                 xdr_argument = xdr_cryptkeyarg2;
 649                 xdr_result = xdr_cryptkeyres;
 650                 local = (char *(*)()) key_decrypt_pk_2_svc_prog;
 651                 check_auth = 1;
 652                 break;
 653
 654
 655         case KEY_NET_PUT:
 656                 xdr_argument = xdr_key_netstarg;
 657                 xdr_result = xdr_keystatus;
 658                 local = (char *(*)()) key_net_put_2_svc_prog;
 659                 check_auth = 1;
 660                 break;
 661
 662         case KEY_NET_GET:
 663                 xdr_argument = (xdrproc_t) xdr_void;
 664                 xdr_result = xdr_key_netstres;
 665                 local = (char *(*)()) key_net_get_2_svc_prog;
 666                 check_auth = 1;
 667                 break;
 668
 669         case KEY_GET_CONV:
 670                 xdr_argument = (xdrproc_t) xdr_keybuf;
 671                 xdr_result = xdr_cryptkeyres;
 672                 local = (char *(*)()) key_get_conv_2_svc_prog;
 673                 check_auth = 1;
 674                 break;
 675
 676         default:
 677                 svcerr_noproc(transp);
 678                 return;
 679         }
 680         if (check_auth) {
 681                 if (root_auth(transp, rqstp) == 0) {
 682                         if (debugging) {
 683                                 fprintf(stderr,
 684                                         "not local privileged process\n");
 685                         }
 686                         svcerr_weakauth(transp);
 687                         return;
 688                 }
 689                 if (rqstp->rq_cred.oa_flavor != AUTH_SYS) {
 690                         if (debugging) {
 691                                 fprintf(stderr, "not unix authentication\n");
 692                         }
 693                         svcerr_weakauth(transp);
 694                         return;
 695                 }
 696                 uid = ((struct authsys_parms *)rqstp->rq_clntcred)->aup_uid;
 697         }
 698
 699         memset((char *) &argument, 0, sizeof (argument));
 700         if (!svc_getargs(transp, xdr_argument, (caddr_t)&argument)) {
 701                 svcerr_decode(transp);
 702                 return;
 703         }
 704         result = (*local) (uid, &argument);
 705         if (!svc_sendreply(transp, xdr_result, (char *) result)) {
 706                 if (debugging)
 707                         fprintf(stderr, "unable to reply\n");
 708                 svcerr_systemerr(transp);
 709         }
 710         if (!svc_freeargs(transp, xdr_argument, (caddr_t)&argument)) {
 711                 if (debugging)
 712                         fprintf(stderr, "unable to free arguments\n");
 713                 exit(1);
 714         }
 715         return;
 716 }
 717
 718 static int
 719 root_auth(SVCXPRT *trans, struct svc_req *rqstp)
 720 {
 721         uid_t uid;
 722         struct sockaddr_in *remote;
 723
 724         remote = svc_getcaller(trans);
 725         if (remote->sin_family == AF_INET) {
 726                 if (debugging)
 727                         fprintf(stderr, "client didn't use AF_UNIX\n");
 728                 return (0);
 729         }
 730
 731         if (__rpc_get_local_uid(&uid, trans) < 0) {
 732                 if (debugging)
 733                         fprintf(stderr, "__rpc_get_local_uid failed\n");
 734                 return (0);
 735         }
 736
 737         if (debugging)
 738                 fprintf(stderr, "local_uid  %ld\n", uid);
 739         if (uid == 0)
 740                 return (1);
 741         if (rqstp->rq_cred.oa_flavor == AUTH_SYS) {
 742                 if (((uid_t) ((struct authunix_parms *)
 743                         rqstp->rq_clntcred)->aup_uid)
 744                         == uid) {
 745                         return (1);
 746                 } else {
 747                         if (debugging)
 748                                 fprintf(stderr,
 749                         "local_uid  %ld mismatches auth %ld\n", uid,
 750 ((uid_t) ((struct authunix_parms *)rqstp->rq_clntcred)->aup_uid));
 751                         return (0);
 752                 }
 753         } else {
 754                 if (debugging)
 755                         fprintf(stderr, "Not auth sys\n");
 756                 return (0);
 757         }
 758 }
 759
 760 static void
 761 usage(void)
 762 {
 763         fprintf(stderr, "usage: keyserv [-n] [-D] [-d] [-v] [-p path]\n");
 764         fprintf(stderr, "-d disables the use of default keys\n");
 765         exit(1);
 766 }