keyserv.c revision 100120
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 32static char sccsid[] = "@(#)keyserv.c 1.15 94/04/25 SMI"; 33#endif 34static const char rcsid[] = 35 "$FreeBSD: head/usr.sbin/keyserv/keyserv.c 100120 2002-07-15 18:51:57Z alfred $"; 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 75static void randomize __P(( des_block * )); 76static void usage __P(( void )); 77static int getrootkey __P(( des_block *, int )); 78static int root_auth __P(( SVCXPRT *, struct svc_req * )); 79 80#ifdef DEBUG 81static int debugging = 1; 82#else 83static int debugging = 0; 84#endif 85 86static void keyprogram(); 87static des_block masterkey; 88char *getenv(); 89static 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 100extern cryptkeyres *(*__key_encryptsession_pk_LOCAL)(); 101extern cryptkeyres *(*__key_decryptsession_pk_LOCAL)(); 102extern des_block *(*__key_gendes_LOCAL)(); 103extern int (*__des_crypt_LOCAL)(); 104 105cryptkeyres *key_encrypt_pk_2_svc_prog __P(( uid_t, cryptkeyarg2 * )); 106cryptkeyres *key_decrypt_pk_2_svc_prog __P(( uid_t, cryptkeyarg2 * )); 107des_block *key_gen_1_svc_prog __P(( void *, struct svc_req * )); 108 109int 110main(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 */ 223static void 224randomize(master) 225 des_block *master; 226{ 227 int i; 228 int seed; 229 struct timeval tv; 230 int shift; 231 232 seed = 0; 233 for (i = 0; i < 1024; i++) { 234 (void) gettimeofday(&tv, (struct timezone *) NULL); 235 shift = i % 8 * sizeof (int); 236 seed ^= (tv.tv_usec << shift) | (tv.tv_usec >> (32 - shift)); 237 } 238#ifdef KEYSERV_RANDOM 239 srandom(seed); 240 master->key.low = random(); 241 master->key.high = random(); 242 srandom(seed); 243#else 244 /* use stupid dangerous bad rand() */ 245 srand(seed); 246 master->key.low = rand(); 247 master->key.high = rand(); 248 srand(seed); 249#endif 250} 251 252/* 253 * Try to get root's secret key, by prompting if terminal is a tty, else trying 254 * from standard input. 255 * Returns 1 on success. 256 */ 257static int 258getrootkey(master, prompt) 259 des_block *master; 260 int prompt; 261{ 262 char *passwd; 263 char name[MAXNETNAMELEN + 1]; 264 char secret[HEXKEYBYTES]; 265 key_netstarg netstore; 266 int fd; 267 268 if (!prompt) { 269 /* 270 * Read secret key out of ROOTKEY 271 */ 272 fd = open(ROOTKEY, O_RDONLY, 0); 273 if (fd < 0) { 274 randomize(master); 275 return (0); 276 } 277 if (read(fd, secret, HEXKEYBYTES) < HEXKEYBYTES) { 278 warnx("the key read from %s was too short", ROOTKEY); 279 (void) close(fd); 280 return (0); 281 } 282 (void) close(fd); 283 if (!getnetname(name)) { 284 warnx( 285 "failed to generate host's netname when establishing root's key"); 286 return (0); 287 } 288 memcpy(netstore.st_priv_key, secret, HEXKEYBYTES); 289 memset(netstore.st_pub_key, 0, HEXKEYBYTES); 290 netstore.st_netname = name; 291 if (pk_netput(0, &netstore) != KEY_SUCCESS) { 292 warnx("could not set root's key and netname"); 293 return (0); 294 } 295 return (1); 296 } 297 /* 298 * Decrypt yellow pages publickey entry to get secret key 299 */ 300 passwd = getpass("root password:"); 301 passwd2des(passwd, (char *)master); 302 getnetname(name); 303 if (!getsecretkey(name, secret, passwd)) { 304 warnx("can't find %s's secret key", name); 305 return (0); 306 } 307 if (secret[0] == 0) { 308 warnx("password does not decrypt secret key for %s", name); 309 return (0); 310 } 311 (void) pk_setkey(0, secret); 312 /* 313 * Store it for future use in $ROOTKEY, if possible 314 */ 315 fd = open(ROOTKEY, O_WRONLY|O_TRUNC|O_CREAT, 0); 316 if (fd > 0) { 317 char newline = '\n'; 318 319 write(fd, secret, strlen(secret)); 320 write(fd, &newline, sizeof (newline)); 321 close(fd); 322 } 323 return (1); 324} 325 326/* 327 * Procedures to implement RPC service 328 */ 329char * 330strstatus(status) 331 keystatus status; 332{ 333 switch (status) { 334 case KEY_SUCCESS: 335 return ("KEY_SUCCESS"); 336 case KEY_NOSECRET: 337 return ("KEY_NOSECRET"); 338 case KEY_UNKNOWN: 339 return ("KEY_UNKNOWN"); 340 case KEY_SYSTEMERR: 341 return ("KEY_SYSTEMERR"); 342 default: 343 return ("(bad result code)"); 344 } 345} 346 347keystatus * 348key_set_1_svc_prog(uid, key) 349 uid_t uid; 350 keybuf key; 351{ 352 static keystatus status; 353 354 if (debugging) { 355 (void) fprintf(stderr, "set(%ld, %.*s) = ", uid, 356 (int) sizeof (keybuf), key); 357 } 358 status = pk_setkey(uid, key); 359 if (debugging) { 360 (void) fprintf(stderr, "%s\n", strstatus(status)); 361 (void) fflush(stderr); 362 } 363 return (&status); 364} 365 366cryptkeyres * 367key_encrypt_pk_2_svc_prog(uid, arg) 368 uid_t uid; 369 cryptkeyarg2 *arg; 370{ 371 static cryptkeyres res; 372 373 if (debugging) { 374 (void) fprintf(stderr, "encrypt(%ld, %s, %08x%08x) = ", uid, 375 arg->remotename, arg->deskey.key.high, 376 arg->deskey.key.low); 377 } 378 res.cryptkeyres_u.deskey = arg->deskey; 379 res.status = pk_encrypt(uid, arg->remotename, &(arg->remotekey), 380 &res.cryptkeyres_u.deskey); 381 if (debugging) { 382 if (res.status == KEY_SUCCESS) { 383 (void) fprintf(stderr, "%08x%08x\n", 384 res.cryptkeyres_u.deskey.key.high, 385 res.cryptkeyres_u.deskey.key.low); 386 } else { 387 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 388 } 389 (void) fflush(stderr); 390 } 391 return (&res); 392} 393 394cryptkeyres * 395key_decrypt_pk_2_svc_prog(uid, arg) 396 uid_t uid; 397 cryptkeyarg2 *arg; 398{ 399 static cryptkeyres res; 400 401 if (debugging) { 402 (void) fprintf(stderr, "decrypt(%ld, %s, %08x%08x) = ", uid, 403 arg->remotename, arg->deskey.key.high, 404 arg->deskey.key.low); 405 } 406 res.cryptkeyres_u.deskey = arg->deskey; 407 res.status = pk_decrypt(uid, arg->remotename, &(arg->remotekey), 408 &res.cryptkeyres_u.deskey); 409 if (debugging) { 410 if (res.status == KEY_SUCCESS) { 411 (void) fprintf(stderr, "%08x%08x\n", 412 res.cryptkeyres_u.deskey.key.high, 413 res.cryptkeyres_u.deskey.key.low); 414 } else { 415 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 416 } 417 (void) fflush(stderr); 418 } 419 return (&res); 420} 421 422keystatus * 423key_net_put_2_svc_prog(uid, arg) 424 uid_t uid; 425 key_netstarg *arg; 426{ 427 static keystatus status; 428 429 if (debugging) { 430 (void) fprintf(stderr, "net_put(%s, %.*s, %.*s) = ", 431 arg->st_netname, (int)sizeof (arg->st_pub_key), 432 arg->st_pub_key, (int)sizeof (arg->st_priv_key), 433 arg->st_priv_key); 434 }; 435 436 status = pk_netput(uid, arg); 437 438 if (debugging) { 439 (void) fprintf(stderr, "%s\n", strstatus(status)); 440 (void) fflush(stderr); 441 } 442 443 return (&status); 444} 445 446key_netstres * 447key_net_get_2_svc_prog(uid, arg) 448 uid_t uid; 449 void *arg; 450{ 451 static key_netstres keynetname; 452 453 if (debugging) 454 (void) fprintf(stderr, "net_get(%ld) = ", uid); 455 456 keynetname.status = pk_netget(uid, &keynetname.key_netstres_u.knet); 457 if (debugging) { 458 if (keynetname.status == KEY_SUCCESS) { 459 fprintf(stderr, "<%s, %.*s, %.*s>\n", 460 keynetname.key_netstres_u.knet.st_netname, 461 (int)sizeof (keynetname.key_netstres_u.knet.st_pub_key), 462 keynetname.key_netstres_u.knet.st_pub_key, 463 (int)sizeof (keynetname.key_netstres_u.knet.st_priv_key), 464 keynetname.key_netstres_u.knet.st_priv_key); 465 } else { 466 (void) fprintf(stderr, "NOT FOUND\n"); 467 } 468 (void) fflush(stderr); 469 } 470 471 return (&keynetname); 472 473} 474 475cryptkeyres * 476key_get_conv_2_svc_prog(uid, arg) 477 uid_t uid; 478 keybuf arg; 479{ 480 static cryptkeyres res; 481 482 if (debugging) 483 (void) fprintf(stderr, "get_conv(%ld, %.*s) = ", uid, 484 (int)sizeof (arg), arg); 485 486 487 res.status = pk_get_conv_key(uid, arg, &res); 488 489 if (debugging) { 490 if (res.status == KEY_SUCCESS) { 491 (void) fprintf(stderr, "%08x%08x\n", 492 res.cryptkeyres_u.deskey.key.high, 493 res.cryptkeyres_u.deskey.key.low); 494 } else { 495 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 496 } 497 (void) fflush(stderr); 498 } 499 return (&res); 500} 501 502 503cryptkeyres * 504key_encrypt_1_svc_prog(uid, arg) 505 uid_t uid; 506 cryptkeyarg *arg; 507{ 508 static cryptkeyres res; 509 510 if (debugging) { 511 (void) fprintf(stderr, "encrypt(%ld, %s, %08x%08x) = ", uid, 512 arg->remotename, arg->deskey.key.high, 513 arg->deskey.key.low); 514 } 515 res.cryptkeyres_u.deskey = arg->deskey; 516 res.status = pk_encrypt(uid, arg->remotename, NULL, 517 &res.cryptkeyres_u.deskey); 518 if (debugging) { 519 if (res.status == KEY_SUCCESS) { 520 (void) fprintf(stderr, "%08x%08x\n", 521 res.cryptkeyres_u.deskey.key.high, 522 res.cryptkeyres_u.deskey.key.low); 523 } else { 524 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 525 } 526 (void) fflush(stderr); 527 } 528 return (&res); 529} 530 531cryptkeyres * 532key_decrypt_1_svc_prog(uid, arg) 533 uid_t uid; 534 cryptkeyarg *arg; 535{ 536 static cryptkeyres res; 537 538 if (debugging) { 539 (void) fprintf(stderr, "decrypt(%ld, %s, %08x%08x) = ", uid, 540 arg->remotename, arg->deskey.key.high, 541 arg->deskey.key.low); 542 } 543 res.cryptkeyres_u.deskey = arg->deskey; 544 res.status = pk_decrypt(uid, arg->remotename, NULL, 545 &res.cryptkeyres_u.deskey); 546 if (debugging) { 547 if (res.status == KEY_SUCCESS) { 548 (void) fprintf(stderr, "%08x%08x\n", 549 res.cryptkeyres_u.deskey.key.high, 550 res.cryptkeyres_u.deskey.key.low); 551 } else { 552 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 553 } 554 (void) fflush(stderr); 555 } 556 return (&res); 557} 558 559/* ARGSUSED */ 560des_block * 561key_gen_1_svc_prog(v, s) 562 void *v; 563 struct svc_req *s; 564{ 565 struct timeval time; 566 static des_block keygen; 567 static des_block key; 568 569 (void) gettimeofday(&time, (struct timezone *) NULL); 570 keygen.key.high += (time.tv_sec ^ time.tv_usec); 571 keygen.key.low += (time.tv_sec ^ time.tv_usec); 572 ecb_crypt((char *)&masterkey, (char *)&keygen, sizeof (keygen), 573 DES_ENCRYPT | DES_HW); 574 key = keygen; 575 des_setparity((char *)&key); 576 if (debugging) { 577 (void) fprintf(stderr, "gen() = %08x%08x\n", key.key.high, 578 key.key.low); 579 (void) fflush(stderr); 580 } 581 return (&key); 582} 583 584getcredres * 585key_getcred_1_svc_prog(uid, name) 586 uid_t uid; 587 netnamestr *name; 588{ 589 static getcredres res; 590 static u_int gids[NGROUPS]; 591 struct unixcred *cred; 592 593 cred = &res.getcredres_u.cred; 594 cred->gids.gids_val = gids; 595 if (!netname2user(*name, (uid_t *) &cred->uid, (gid_t *) &cred->gid, 596 (int *)&cred->gids.gids_len, (gid_t *)gids)) { 597 res.status = KEY_UNKNOWN; 598 } else { 599 res.status = KEY_SUCCESS; 600 } 601 if (debugging) { 602 (void) fprintf(stderr, "getcred(%s) = ", *name); 603 if (res.status == KEY_SUCCESS) { 604 (void) fprintf(stderr, "uid=%d, gid=%d, grouplen=%d\n", 605 cred->uid, cred->gid, cred->gids.gids_len); 606 } else { 607 (void) fprintf(stderr, "%s\n", strstatus(res.status)); 608 } 609 (void) fflush(stderr); 610 } 611 return (&res); 612} 613 614/* 615 * RPC boilerplate 616 */ 617static void 618keyprogram(rqstp, transp) 619 struct svc_req *rqstp; 620 SVCXPRT *transp; 621{ 622 union { 623 keybuf key_set_1_arg; 624 cryptkeyarg key_encrypt_1_arg; 625 cryptkeyarg key_decrypt_1_arg; 626 netnamestr key_getcred_1_arg; 627 cryptkeyarg key_encrypt_2_arg; 628 cryptkeyarg key_decrypt_2_arg; 629 netnamestr key_getcred_2_arg; 630 cryptkeyarg2 key_encrypt_pk_2_arg; 631 cryptkeyarg2 key_decrypt_pk_2_arg; 632 key_netstarg key_net_put_2_arg; 633 netobj key_get_conv_2_arg; 634 } argument; 635 char *result; 636 xdrproc_t xdr_argument, xdr_result; 637 char *(*local) (); 638 uid_t uid = -1; 639 int check_auth; 640 641 switch (rqstp->rq_proc) { 642 case NULLPROC: 643 svc_sendreply(transp, (xdrproc_t)xdr_void, NULL); 644 return; 645 646 case KEY_SET: 647 xdr_argument = (xdrproc_t)xdr_keybuf; 648 xdr_result = (xdrproc_t)xdr_int; 649 local = (char *(*)()) key_set_1_svc_prog; 650 check_auth = 1; 651 break; 652 653 case KEY_ENCRYPT: 654 xdr_argument = (xdrproc_t)xdr_cryptkeyarg; 655 xdr_result = (xdrproc_t)xdr_cryptkeyres; 656 local = (char *(*)()) key_encrypt_1_svc_prog; 657 check_auth = 1; 658 break; 659 660 case KEY_DECRYPT: 661 xdr_argument = (xdrproc_t)xdr_cryptkeyarg; 662 xdr_result = (xdrproc_t)xdr_cryptkeyres; 663 local = (char *(*)()) key_decrypt_1_svc_prog; 664 check_auth = 1; 665 break; 666 667 case KEY_GEN: 668 xdr_argument = (xdrproc_t)xdr_void; 669 xdr_result = (xdrproc_t)xdr_des_block; 670 local = (char *(*)()) key_gen_1_svc_prog; 671 check_auth = 0; 672 break; 673 674 case KEY_GETCRED: 675 xdr_argument = (xdrproc_t)xdr_netnamestr; 676 xdr_result = (xdrproc_t)xdr_getcredres; 677 local = (char *(*)()) key_getcred_1_svc_prog; 678 check_auth = 0; 679 break; 680 681 case KEY_ENCRYPT_PK: 682 xdr_argument = (xdrproc_t)xdr_cryptkeyarg2; 683 xdr_result = (xdrproc_t)xdr_cryptkeyres; 684 local = (char *(*)()) key_encrypt_pk_2_svc_prog; 685 check_auth = 1; 686 break; 687 688 case KEY_DECRYPT_PK: 689 xdr_argument = (xdrproc_t)xdr_cryptkeyarg2; 690 xdr_result = (xdrproc_t)xdr_cryptkeyres; 691 local = (char *(*)()) key_decrypt_pk_2_svc_prog; 692 check_auth = 1; 693 break; 694 695 696 case KEY_NET_PUT: 697 xdr_argument = (xdrproc_t)xdr_key_netstarg; 698 xdr_result = (xdrproc_t)xdr_keystatus; 699 local = (char *(*)()) key_net_put_2_svc_prog; 700 check_auth = 1; 701 break; 702 703 case KEY_NET_GET: 704 xdr_argument = (xdrproc_t) xdr_void; 705 xdr_result = (xdrproc_t)xdr_key_netstres; 706 local = (char *(*)()) key_net_get_2_svc_prog; 707 check_auth = 1; 708 break; 709 710 case KEY_GET_CONV: 711 xdr_argument = (xdrproc_t) xdr_keybuf; 712 xdr_result = (xdrproc_t)xdr_cryptkeyres; 713 local = (char *(*)()) key_get_conv_2_svc_prog; 714 check_auth = 1; 715 break; 716 717 default: 718 svcerr_noproc(transp); 719 return; 720 } 721 if (check_auth) { 722 if (root_auth(transp, rqstp) == 0) { 723 if (debugging) { 724 (void) fprintf(stderr, 725 "not local privileged process\n"); 726 } 727 svcerr_weakauth(transp); 728 return; 729 } 730 if (rqstp->rq_cred.oa_flavor != AUTH_SYS) { 731 if (debugging) { 732 (void) fprintf(stderr, 733 "not unix authentication\n"); 734 } 735 svcerr_weakauth(transp); 736 return; 737 } 738 uid = ((struct authsys_parms *)rqstp->rq_clntcred)->aup_uid; 739 } 740 741 memset(&argument, 0, sizeof (argument)); 742 if (!svc_getargs(transp, xdr_argument, &argument)) { 743 svcerr_decode(transp); 744 return; 745 } 746 result = (*local) (uid, &argument); 747 if (!svc_sendreply(transp, xdr_result, result)) { 748 if (debugging) 749 (void) fprintf(stderr, "unable to reply\n"); 750 svcerr_systemerr(transp); 751 } 752 if (!svc_freeargs(transp, xdr_argument, &argument)) { 753 if (debugging) 754 (void) fprintf(stderr, 755 "unable to free arguments\n"); 756 exit(1); 757 } 758 return; 759} 760 761static int 762root_auth(trans, rqstp) 763 SVCXPRT *trans; 764 struct svc_req *rqstp; 765{ 766 uid_t uid; 767 struct sockaddr *remote; 768 769 remote = svc_getrpccaller(trans)->buf; 770 if (remote->sa_family != AF_UNIX) { 771 if (debugging) 772 fprintf(stderr, "client didn't use AF_UNIX\n"); 773 return (0); 774 } 775 776 if (__rpc_get_local_uid(trans, &uid) < 0) { 777 if (debugging) 778 fprintf(stderr, "__rpc_get_local_uid failed\n"); 779 return (0); 780 } 781 782 if (debugging) 783 fprintf(stderr, "local_uid %ld\n", uid); 784 if (uid == 0) 785 return (1); 786 if (rqstp->rq_cred.oa_flavor == AUTH_SYS) { 787 if (((uid_t) ((struct authunix_parms *) 788 rqstp->rq_clntcred)->aup_uid) 789 == uid) { 790 return (1); 791 } else { 792 if (debugging) 793 fprintf(stderr, 794 "local_uid %ld mismatches auth %ld\n", uid, 795((uid_t) ((struct authunix_parms *)rqstp->rq_clntcred)->aup_uid)); 796 return (0); 797 } 798 } else { 799 if (debugging) 800 fprintf(stderr, "Not auth sys\n"); 801 return (0); 802 } 803} 804 805static void 806usage() 807{ 808 (void) fprintf(stderr, 809 "usage: keyserv [-n] [-D] [-d] [-v] [-p path]\n"); 810 (void) fprintf(stderr, "-d disables the use of default keys\n"); 811 exit(1); 812} 813