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 30 #ifndef lint 31 #if 0 32 static char sccsid[] = "@(#)keyserv.c 1.15 94/04/25 SMI"; 33 #endif 34 static const char rcsid[] = 35 "$FreeBSD$"; 36 #endif /* not lint */ 37 38 /* 39 * Copyright (c) 1986 - 1991 by Sun Microsystems, Inc. 40 */ 41 42 /* 43 * Keyserver 44 * Store secret keys per uid. Do public key encryption and decryption 45 * operations. Generate "random" keys. 46 * Do not talk to anything but a local root 47 * process on the local transport only 48 */ 49 50 #include <err.h> 51 #include <pwd.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <string.h> 55 #include <unistd.h> 56 #include <sys/stat.h> 57 #include <sys/types.h> 58 #include <rpc/rpc.h> 59 #include <sys/param.h> 60 #include <sys/file.h> 61 #include <rpc/des_crypt.h> 62 #include <rpc/des.h> 63 #include <rpc/key_prot.h> 64 #include <rpcsvc/crypt.h> 65 #include "keyserv.h" 66 67 #ifndef NGROUPS 68 #define NGROUPS 16 69 #endif 70 71 #ifndef KEYSERVSOCK 72 #define KEYSERVSOCK "/var/run/keyservsock" 73 #endif 74 75 static void randomize( des_block * ); 76 static void usage( void ); 77 static int getrootkey( des_block *, int ); 78 static int root_auth( SVCXPRT *, struct svc_req * ); 79 80 #ifdef DEBUG 81 static int debugging = 1; 82 #else 83 static int debugging = 0; 84 #endif 85 86 static void keyprogram(); 87 static des_block masterkey; 88 char *getenv(); 89 static char ROOTKEY[] = "/etc/.rootkey"; 90 91 /* 92 * Hack to allow the keyserver to use AUTH_DES (for authenticated 93 * NIS+ calls, for example). The only functions that get called 94 * are key_encryptsession_pk, key_decryptsession_pk, and key_gendes. 95 * 96 * The approach is to have the keyserver fill in pointers to local 97 * implementations of these functions, and to call those in key_call(). 98 */ 99 100 extern cryptkeyres *(*__key_encryptsession_pk_LOCAL)(); 101 extern cryptkeyres *(*__key_decryptsession_pk_LOCAL)(); 102 extern des_block *(*__key_gendes_LOCAL)(); 103 extern int (*__des_crypt_LOCAL)(); 104 105 cryptkeyres *key_encrypt_pk_2_svc_prog( uid_t, cryptkeyarg2 * ); 106 cryptkeyres *key_decrypt_pk_2_svc_prog( uid_t, cryptkeyarg2 * ); 107 des_block *key_gen_1_svc_prog( void *, struct svc_req * ); 108 109 int 110 main(argc, argv) 111 int argc; 112 char *argv[]; 113 { 114 int nflag = 0; 115 int c; 116 int warn = 0; 117 char *path = NULL; 118 void *localhandle; 119 register SVCXPRT *transp; 120 struct netconfig *nconf = NULL; 121 122 __key_encryptsession_pk_LOCAL = &key_encrypt_pk_2_svc_prog; 123 __key_decryptsession_pk_LOCAL = &key_decrypt_pk_2_svc_prog; 124 __key_gendes_LOCAL = &key_gen_1_svc_prog; 125 126 while ((c = getopt(argc, argv, "ndDvp:")) != -1) 127 switch (c) { 128 case 'n': 129 nflag++; 130 break; 131 case 'd': 132 pk_nodefaultkeys(); 133 break; 134 case 'D': 135 debugging = 1; 136 break; 137 case 'v': 138 warn = 1; 139 break; 140 case 'p': 141 path = optarg; 142 break; 143 default: 144 usage(); 145 } 146 147 load_des(warn, path); 148 __des_crypt_LOCAL = _my_crypt; 149 if (svc_auth_reg(AUTH_DES, _svcauth_des) == -1) 150 errx(1, "failed to register AUTH_DES authenticator"); 151 152 if (optind != argc) { 153 usage(); 154 } 155 156 /* 157 * Initialize 158 */ 159 (void) umask(S_IXUSR|S_IXGRP|S_IXOTH); 160 if (geteuid() != 0) 161 errx(1, "keyserv must be run as root"); 162 setmodulus(HEXMODULUS); 163 getrootkey(&masterkey, nflag); 164 165 rpcb_unset(KEY_PROG, KEY_VERS, NULL); 166 rpcb_unset(KEY_PROG, KEY_VERS2, NULL); 167 168 if (svc_create(keyprogram, KEY_PROG, KEY_VERS, 169 "netpath") == 0) { 170 (void) fprintf(stderr, 171 "%s: unable to create service\n", argv[0]); 172 exit(1); 173 } 174 175 if (svc_create(keyprogram, KEY_PROG, KEY_VERS2, 176 "netpath") == 0) { 177 (void) fprintf(stderr, 178 "%s: unable to create service\n", argv[0]); 179 exit(1); 180 } 181 182 localhandle = setnetconfig(); 183 while ((nconf = getnetconfig(localhandle)) != NULL) { 184 if (nconf->nc_protofmly != NULL && 185 strcmp(nconf->nc_protofmly, NC_LOOPBACK) == 0) 186 break; 187 } 188 189 if (nconf == NULL) 190 errx(1, "getnetconfig: %s", nc_sperror()); 191 192 unlink(KEYSERVSOCK); 193 rpcb_unset(CRYPT_PROG, CRYPT_VERS, nconf); 194 transp = svcunix_create(RPC_ANYSOCK, 0, 0, KEYSERVSOCK); 195 if (transp == NULL) 196 errx(1, "cannot create AF_LOCAL service"); 197 if (!svc_reg(transp, KEY_PROG, KEY_VERS, keyprogram, nconf)) 198 errx(1, "unable to register (KEY_PROG, KEY_VERS, unix)"); 199 if (!svc_reg(transp, KEY_PROG, KEY_VERS2, keyprogram, nconf)) 200 errx(1, "unable to register (KEY_PROG, KEY_VERS2, unix)"); 201 if (!svc_reg(transp, CRYPT_PROG, CRYPT_VERS, crypt_prog_1, nconf)) 202 errx(1, "unable to register (CRYPT_PROG, CRYPT_VERS, unix)"); 203 204 endnetconfig(localhandle); 205 206 (void) umask(066); /* paranoia */ 207 208 if (!debugging) { 209 daemon(0,0); 210 } 211 212 signal(SIGPIPE, SIG_IGN); 213 214 svc_run(); 215 abort(); 216 /* NOTREACHED */ 217 } 218 219 /* 220 * In the event that we don't get a root password, we try to 221 * randomize the master key the best we can 222 */ 223 static void 224 randomize(master) 225 des_block *master; 226 { 227 #ifndef __FreeBSD__ 228 int i; 229 int seed; 230 struct timeval tv; 231 int shift; 232 233 seed = 0; 234 for (i = 0; i < 1024; i++) { 235 (void)gettimeofday(&tv, NULL); 236 shift = i % 8 * sizeof (int); 237 seed ^= (tv.tv_usec << shift) | (tv.tv_usec >> (32 - shift)); 238 } 239 #endif 240 #ifdef KEYSERV_RANDOM 241 #ifdef __FreeBSD__ 242 master->key.low = arc4random(); 243 master->key.high = arc4random(); 244 #else 245 srandom(seed); 246 master->key.low = random(); 247 master->key.high = random(); 248 #endif 249 #else 250 /* use stupid dangerous bad rand() */ 251 #ifdef __FreeBSD__ 252 sranddev(); 253 #else 254 srand(seed); 255 #endif 256 master->key.low = rand(); 257 master->key.high = rand(); 258 #endif 259 } 260 261 /* 262 * Try to get root's secret key, by prompting if terminal is a tty, else trying 263 * from standard input. 264 * Returns 1 on success. 265 */ 266 static int 267 getrootkey(master, prompt) 268 des_block *master; 269 int prompt; 270 { 271 char *passwd; 272 char name[MAXNETNAMELEN + 1]; 273 char secret[HEXKEYBYTES]; 274 key_netstarg netstore; 275 int fd; 276 277 if (!prompt) { 278 /* 279 * Read secret key out of ROOTKEY 280 */ 281 fd = open(ROOTKEY, O_RDONLY, 0); 282 if (fd < 0) { 283 randomize(master); 284 return (0); 285 } 286 if (read(fd, secret, HEXKEYBYTES) < HEXKEYBYTES) { 287 warnx("the key read from %s was too short", ROOTKEY); 288 (void) close(fd); 289 return (0); 290 } 291 (void) close(fd); 292 if (!getnetname(name)) { 293 warnx( 294 "failed to generate host's netname when establishing root's key"); 295 return (0); 296 } 297 memcpy(netstore.st_priv_key, secret, HEXKEYBYTES); 298 memset(netstore.st_pub_key, 0, HEXKEYBYTES); 299 netstore.st_netname = name; 300 if (pk_netput(0, &netstore) != KEY_SUCCESS) { 301 warnx("could not set root's key and netname"); 302 return (0); 303 } 304 return (1); 305 } 306 /* 307 * Decrypt yellow pages publickey entry to get secret key 308 */ 309 passwd = getpass("root password:"); 310 passwd2des(passwd, (char *)master); 311 getnetname(name); 312 if (!getsecretkey(name, secret, passwd)) { 313 warnx("can't find %s's secret key", name); 314 return (0); 315 } 316 if (secret[0] == 0) { 317 warnx("password does not decrypt secret key for %s", name); 318 return (0); 319 } 320 (void) pk_setkey(0, secret); 321 /* 322 * Store it for future use in $ROOTKEY, if possible 323 */ 324 fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0); 325 if (fd > 0) { 326 char newline = '\n'; 327 328 write(fd, secret, strlen(secret)); 329 write(fd, &newline, sizeof (newline)); 330 close(fd); 331 } 332 return (1); 333 } 334 335 /* 336 * Procedures to implement RPC service 337 */ 338 char * 339 strstatus(status) 340 keystatus status; 341 { 342 switch (status) { 343 case KEY_SUCCESS: 344 return ("KEY_SUCCESS"); 345 case KEY_NOSECRET: 346 return ("KEY_NOSECRET"); 347 case KEY_UNKNOWN: 348 return ("KEY_UNKNOWN"); 349 case KEY_SYSTEMERR: 350 return ("KEY_SYSTEMERR"); 351 default: 352 return ("(bad result code)"); 353 } 354 } 355 356 keystatus * 357 key_set_1_svc_prog(uid, key) 358 uid_t uid; 359 keybuf key; 360 { 361 static keystatus status; 362 363 if (debugging) { 364 (void) fprintf(stderr, "set(%u, %.*s) = ", uid, 365 (int) sizeof (keybuf), key); 366 } 367 status = pk_setkey(uid, key); 368 if (debugging) { 369 (void) fprintf(stderr, "%s\n", strstatus(status)); 370 (void) fflush(stderr); 371 } 372 return (&status); 373 } 374 375 cryptkeyres * 376 key_encrypt_pk_2_svc_prog(uid, arg) 377 uid_t uid; 378 cryptkeyarg2 *arg; 379 { 380 static cryptkeyres res; 381 382 if (debugging) { 383 (void) fprintf(stderr, "encrypt(%u, %s, %08x%08x) = ", uid, 384 arg->remotename, arg->deskey.key.high, 385 arg->deskey.key.low); 386 } 387 res.cryptkeyres_u.deskey = arg->deskey; 388 res.status = pk_encrypt(uid, arg->remotename, &(arg->remotekey), 389 &res.cryptkeyres_u.deskey); 390 if (debugging) { 391 if (res.status == KEY_SUCCESS) { 392 (void) fprintf(stderr, "%08x%08x\n", 393 res.cryptkeyres_u.deskey.key.high, 394 res.cryptkeyres_u.deskey.key.low); 395 } else { 396 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 397 } 398 (void) fflush(stderr); 399 } 400 return (&res); 401 } 402 403 cryptkeyres * 404 key_decrypt_pk_2_svc_prog(uid, arg) 405 uid_t uid; 406 cryptkeyarg2 *arg; 407 { 408 static cryptkeyres res; 409 410 if (debugging) { 411 (void) fprintf(stderr, "decrypt(%u, %s, %08x%08x) = ", uid, 412 arg->remotename, arg->deskey.key.high, 413 arg->deskey.key.low); 414 } 415 res.cryptkeyres_u.deskey = arg->deskey; 416 res.status = pk_decrypt(uid, arg->remotename, &(arg->remotekey), 417 &res.cryptkeyres_u.deskey); 418 if (debugging) { 419 if (res.status == KEY_SUCCESS) { 420 (void) fprintf(stderr, "%08x%08x\n", 421 res.cryptkeyres_u.deskey.key.high, 422 res.cryptkeyres_u.deskey.key.low); 423 } else { 424 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 425 } 426 (void) fflush(stderr); 427 } 428 return (&res); 429 } 430 431 keystatus * 432 key_net_put_2_svc_prog(uid, arg) 433 uid_t uid; 434 key_netstarg *arg; 435 { 436 static keystatus status; 437 438 if (debugging) { 439 (void) fprintf(stderr, "net_put(%s, %.*s, %.*s) = ", 440 arg->st_netname, (int)sizeof (arg->st_pub_key), 441 arg->st_pub_key, (int)sizeof (arg->st_priv_key), 442 arg->st_priv_key); 443 }; 444 445 status = pk_netput(uid, arg); 446 447 if (debugging) { 448 (void) fprintf(stderr, "%s\n", strstatus(status)); 449 (void) fflush(stderr); 450 } 451 452 return (&status); 453 } 454 455 key_netstres * 456 key_net_get_2_svc_prog(uid, arg) 457 uid_t uid; 458 void *arg; 459 { 460 static key_netstres keynetname; 461 462 if (debugging) 463 (void) fprintf(stderr, "net_get(%u) = ", uid); 464 465 keynetname.status = pk_netget(uid, &keynetname.key_netstres_u.knet); 466 if (debugging) { 467 if (keynetname.status == KEY_SUCCESS) { 468 fprintf(stderr, "<%s, %.*s, %.*s>\n", 469 keynetname.key_netstres_u.knet.st_netname, 470 (int)sizeof (keynetname.key_netstres_u.knet.st_pub_key), 471 keynetname.key_netstres_u.knet.st_pub_key, 472 (int)sizeof (keynetname.key_netstres_u.knet.st_priv_key), 473 keynetname.key_netstres_u.knet.st_priv_key); 474 } else { 475 (void) fprintf(stderr, "NOT FOUND\n"); 476 } 477 (void) fflush(stderr); 478 } 479 480 return (&keynetname); 481 482 } 483 484 cryptkeyres * 485 key_get_conv_2_svc_prog(uid, arg) 486 uid_t uid; 487 keybuf arg; 488 { 489 static cryptkeyres res; 490 491 if (debugging) 492 (void) fprintf(stderr, "get_conv(%u, %.*s) = ", uid, 493 (int)sizeof (keybuf), arg); 494 495 496 res.status = pk_get_conv_key(uid, arg, &res); 497 498 if (debugging) { 499 if (res.status == KEY_SUCCESS) { 500 (void) fprintf(stderr, "%08x%08x\n", 501 res.cryptkeyres_u.deskey.key.high, 502 res.cryptkeyres_u.deskey.key.low); 503 } else { 504 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 505 } 506 (void) fflush(stderr); 507 } 508 return (&res); 509 } 510 511 512 cryptkeyres * 513 key_encrypt_1_svc_prog(uid, arg) 514 uid_t uid; 515 cryptkeyarg *arg; 516 { 517 static cryptkeyres res; 518 519 if (debugging) { 520 (void) fprintf(stderr, "encrypt(%u, %s, %08x%08x) = ", uid, 521 arg->remotename, arg->deskey.key.high, 522 arg->deskey.key.low); 523 } 524 res.cryptkeyres_u.deskey = arg->deskey; 525 res.status = pk_encrypt(uid, arg->remotename, NULL, 526 &res.cryptkeyres_u.deskey); 527 if (debugging) { 528 if (res.status == KEY_SUCCESS) { 529 (void) fprintf(stderr, "%08x%08x\n", 530 res.cryptkeyres_u.deskey.key.high, 531 res.cryptkeyres_u.deskey.key.low); 532 } else { 533 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 534 } 535 (void) fflush(stderr); 536 } 537 return (&res); 538 } 539 540 cryptkeyres * 541 key_decrypt_1_svc_prog(uid, arg) 542 uid_t uid; 543 cryptkeyarg *arg; 544 { 545 static cryptkeyres res; 546 547 if (debugging) { 548 (void) fprintf(stderr, "decrypt(%u, %s, %08x%08x) = ", uid, 549 arg->remotename, arg->deskey.key.high, 550 arg->deskey.key.low); 551 } 552 res.cryptkeyres_u.deskey = arg->deskey; 553 res.status = pk_decrypt(uid, arg->remotename, NULL, 554 &res.cryptkeyres_u.deskey); 555 if (debugging) { 556 if (res.status == KEY_SUCCESS) { 557 (void) fprintf(stderr, "%08x%08x\n", 558 res.cryptkeyres_u.deskey.key.high, 559 res.cryptkeyres_u.deskey.key.low); 560 } else { 561 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 562 } 563 (void) fflush(stderr); 564 } 565 return (&res); 566 } 567 568 /* ARGSUSED */ 569 des_block * 570 key_gen_1_svc_prog(v, s) 571 void *v; 572 struct svc_req *s; 573 { 574 struct timeval time; 575 static des_block keygen; 576 static des_block key; 577 578 (void)gettimeofday(&time, NULL); 579 keygen.key.high += (time.tv_sec ^ time.tv_usec); 580 keygen.key.low += (time.tv_sec ^ time.tv_usec); 581 ecb_crypt((char *)&masterkey, (char *)&keygen, sizeof (keygen), 582 DES_ENCRYPT | DES_HW); 583 key = keygen; 584 des_setparity((char *)&key); 585 if (debugging) { 586 (void) fprintf(stderr, "gen() = %08x%08x\n", key.key.high, 587 key.key.low); 588 (void) fflush(stderr); 589 } 590 return (&key); 591 } 592 593 getcredres * 594 key_getcred_1_svc_prog(uid, name) 595 uid_t uid; 596 netnamestr *name; 597 { 598 static getcredres res; 599 static u_int gids[NGROUPS]; 600 struct unixcred *cred; 601 602 cred = &res.getcredres_u.cred; 603 cred->gids.gids_val = gids; 604 if (!netname2user(*name, (uid_t *) &cred->uid, (gid_t *) &cred->gid, 605 (int *)&cred->gids.gids_len, (gid_t *)gids)) { 606 res.status = KEY_UNKNOWN; 607 } else { 608 res.status = KEY_SUCCESS; 609 } 610 if (debugging) { 611 (void) fprintf(stderr, "getcred(%s) = ", *name); 612 if (res.status == KEY_SUCCESS) { 613 (void) fprintf(stderr, "uid=%d, gid=%d, grouplen=%d\n", 614 cred->uid, cred->gid, cred->gids.gids_len); 615 } else { 616 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 617 } 618 (void) fflush(stderr); 619 } 620 return (&res); 621 } 622 623 /* 624 * RPC boilerplate 625 */ 626 static void 627 keyprogram(rqstp, transp) 628 struct svc_req *rqstp; 629 SVCXPRT *transp; 630 { 631 union { 632 keybuf key_set_1_arg; 633 cryptkeyarg key_encrypt_1_arg; 634 cryptkeyarg key_decrypt_1_arg; 635 netnamestr key_getcred_1_arg; 636 cryptkeyarg key_encrypt_2_arg; 637 cryptkeyarg key_decrypt_2_arg; 638 netnamestr key_getcred_2_arg; 639 cryptkeyarg2 key_encrypt_pk_2_arg; 640 cryptkeyarg2 key_decrypt_pk_2_arg; 641 key_netstarg key_net_put_2_arg; 642 netobj key_get_conv_2_arg; 643 } argument; 644 char *result; 645 xdrproc_t xdr_argument, xdr_result; 646 char *(*local) (); 647 uid_t uid = -1; 648 int check_auth; 649 650 switch (rqstp->rq_proc) { 651 case NULLPROC: 652 svc_sendreply(transp, (xdrproc_t)xdr_void, NULL); 653 return; 654 655 case KEY_SET: 656 xdr_argument = (xdrproc_t)xdr_keybuf; 657 xdr_result = (xdrproc_t)xdr_int; 658 local = (char *(*)()) key_set_1_svc_prog; 659 check_auth = 1; 660 break; 661 662 case KEY_ENCRYPT: 663 xdr_argument = (xdrproc_t)xdr_cryptkeyarg; 664 xdr_result = (xdrproc_t)xdr_cryptkeyres; 665 local = (char *(*)()) key_encrypt_1_svc_prog; 666 check_auth = 1; 667 break; 668 669 case KEY_DECRYPT: 670 xdr_argument = (xdrproc_t)xdr_cryptkeyarg; 671 xdr_result = (xdrproc_t)xdr_cryptkeyres; 672 local = (char *(*)()) key_decrypt_1_svc_prog; 673 check_auth = 1; 674 break; 675 676 case KEY_GEN: 677 xdr_argument = (xdrproc_t)xdr_void; 678 xdr_result = (xdrproc_t)xdr_des_block; 679 local = (char *(*)()) key_gen_1_svc_prog; 680 check_auth = 0; 681 break; 682 683 case KEY_GETCRED: 684 xdr_argument = (xdrproc_t)xdr_netnamestr; 685 xdr_result = (xdrproc_t)xdr_getcredres; 686 local = (char *(*)()) key_getcred_1_svc_prog; 687 check_auth = 0; 688 break; 689 690 case KEY_ENCRYPT_PK: 691 xdr_argument = (xdrproc_t)xdr_cryptkeyarg2; 692 xdr_result = (xdrproc_t)xdr_cryptkeyres; 693 local = (char *(*)()) key_encrypt_pk_2_svc_prog; 694 check_auth = 1; 695 break; 696 697 case KEY_DECRYPT_PK: 698 xdr_argument = (xdrproc_t)xdr_cryptkeyarg2; 699 xdr_result = (xdrproc_t)xdr_cryptkeyres; 700 local = (char *(*)()) key_decrypt_pk_2_svc_prog; 701 check_auth = 1; 702 break; 703 704 705 case KEY_NET_PUT: 706 xdr_argument = (xdrproc_t)xdr_key_netstarg; 707 xdr_result = (xdrproc_t)xdr_keystatus; 708 local = (char *(*)()) key_net_put_2_svc_prog; 709 check_auth = 1; 710 break; 711 712 case KEY_NET_GET: 713 xdr_argument = (xdrproc_t) xdr_void; 714 xdr_result = (xdrproc_t)xdr_key_netstres; 715 local = (char *(*)()) key_net_get_2_svc_prog; 716 check_auth = 1; 717 break; 718 719 case KEY_GET_CONV: 720 xdr_argument = (xdrproc_t) xdr_keybuf; 721 xdr_result = (xdrproc_t)xdr_cryptkeyres; 722 local = (char *(*)()) key_get_conv_2_svc_prog; 723 check_auth = 1; 724 break; 725 726 default: 727 svcerr_noproc(transp); 728 return; 729 } 730 if (check_auth) { 731 if (root_auth(transp, rqstp) == 0) { 732 if (debugging) { 733 (void) fprintf(stderr, 734 "not local privileged process\n"); 735 } 736 svcerr_weakauth(transp); 737 return; 738 } 739 if (rqstp->rq_cred.oa_flavor != AUTH_SYS) { 740 if (debugging) { 741 (void) fprintf(stderr, 742 "not unix authentication\n"); 743 } 744 svcerr_weakauth(transp); 745 return; 746 } 747 uid = ((struct authsys_parms *)rqstp->rq_clntcred)->aup_uid; 748 } 749 750 memset(&argument, 0, sizeof (argument)); 751 if (!svc_getargs(transp, xdr_argument, &argument)) { 752 svcerr_decode(transp); 753 return; 754 } 755 result = (*local) (uid, &argument); 756 if (!svc_sendreply(transp, xdr_result, result)) { 757 if (debugging) 758 (void) fprintf(stderr, "unable to reply\n"); 759 svcerr_systemerr(transp); 760 } 761 if (!svc_freeargs(transp, xdr_argument, &argument)) { 762 if (debugging) 763 (void) fprintf(stderr, 764 "unable to free arguments\n"); 765 exit(1); 766 } 767 return; 768 } 769 770 static int 771 root_auth(trans, rqstp) 772 SVCXPRT *trans; 773 struct svc_req *rqstp; 774 { 775 uid_t uid; 776 struct sockaddr *remote; 777 778 remote = svc_getrpccaller(trans)->buf; 779 if (remote->sa_family != AF_UNIX) { 780 if (debugging) 781 fprintf(stderr, "client didn't use AF_UNIX\n"); 782 return (0); 783 } 784 785 if (__rpc_get_local_uid(trans, &uid) < 0) { 786 if (debugging) 787 fprintf(stderr, "__rpc_get_local_uid failed\n"); 788 return (0); 789 } 790 791 if (debugging) 792 fprintf(stderr, "local_uid %u\n", uid); 793 if (uid == 0) 794 return (1); 795 if (rqstp->rq_cred.oa_flavor == AUTH_SYS) { 796 if (((uid_t) ((struct authunix_parms *) 797 rqstp->rq_clntcred)->aup_uid) 798 == uid) { 799 return (1); 800 } else { 801 if (debugging) 802 fprintf(stderr, 803 "local_uid %u mismatches auth %u\n", uid, 804 ((uid_t) ((struct authunix_parms *)rqstp->rq_clntcred)->aup_uid)); 805 return (0); 806 } 807 } else { 808 if (debugging) 809 fprintf(stderr, "Not auth sys\n"); 810 return (0); 811 } 812 } 813 814 static void 815 usage() 816 { 817 (void) fprintf(stderr, 818 "usage: keyserv [-n] [-D] [-d] [-v] [-p path]\n"); 819 (void) fprintf(stderr, "-d disables the use of default keys\n"); 820 exit(1); 821 } 822