dnssec-dsfromkey.c revision 1.2.2.3
1 /* $NetBSD: dnssec-dsfromkey.c,v 1.2.2.3 2019/01/18 08:49:11 pgoyette Exp $ */ 2 3 /* 4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 5 * 6 * This Source Code Form is subject to the terms of the Mozilla Public 7 * License, v. 2.0. If a copy of the MPL was not distributed with this 8 * file, You can obtain one at http://mozilla.org/MPL/2.0/. 9 * 10 * See the COPYRIGHT file distributed with this work for additional 11 * information regarding copyright ownership. 12 */ 13 14 /*! \file */ 15 16 #include <config.h> 17 18 #include <inttypes.h> 19 #include <stdbool.h> 20 #include <stdlib.h> 21 22 #include <isc/buffer.h> 23 #include <isc/commandline.h> 24 #include <isc/hash.h> 25 #include <isc/mem.h> 26 #include <isc/print.h> 27 #include <isc/string.h> 28 #include <isc/util.h> 29 30 #include <dns/callbacks.h> 31 #include <dns/db.h> 32 #include <dns/dbiterator.h> 33 #include <dns/ds.h> 34 #include <dns/fixedname.h> 35 #include <dns/keyvalues.h> 36 #include <dns/log.h> 37 #include <dns/master.h> 38 #include <dns/name.h> 39 #include <dns/rdata.h> 40 #include <dns/rdataclass.h> 41 #include <dns/rdataset.h> 42 #include <dns/rdatasetiter.h> 43 #include <dns/rdatatype.h> 44 #include <dns/result.h> 45 46 #include <dst/dst.h> 47 48 #if USE_PKCS11 49 #include <pk11/result.h> 50 #endif 51 52 #include "dnssectool.h" 53 54 #ifndef PATH_MAX 55 #define PATH_MAX 1024 /* WIN32, and others don't define this. */ 56 #endif 57 58 const char *program = "dnssec-dsfromkey"; 59 int verbose; 60 61 static dns_rdataclass_t rdclass; 62 static dns_fixedname_t fixed; 63 static dns_name_t *name = NULL; 64 static isc_mem_t *mctx = NULL; 65 static uint32_t ttl; 66 static bool emitttl = false; 67 68 static isc_result_t 69 initname(char *setname) { 70 isc_result_t result; 71 isc_buffer_t buf; 72 73 name = dns_fixedname_initname(&fixed); 74 75 isc_buffer_init(&buf, setname, strlen(setname)); 76 isc_buffer_add(&buf, strlen(setname)); 77 result = dns_name_fromtext(name, &buf, dns_rootname, 0, NULL); 78 return (result); 79 } 80 81 static void 82 db_load_from_stream(dns_db_t *db, FILE *fp) { 83 isc_result_t result; 84 dns_rdatacallbacks_t callbacks; 85 86 dns_rdatacallbacks_init(&callbacks); 87 result = dns_db_beginload(db, &callbacks); 88 if (result != ISC_R_SUCCESS) 89 fatal("dns_db_beginload failed: %s", isc_result_totext(result)); 90 91 result = dns_master_loadstream(fp, name, name, rdclass, 0, 92 &callbacks, mctx); 93 if (result != ISC_R_SUCCESS) 94 fatal("can't load from input: %s", isc_result_totext(result)); 95 96 result = dns_db_endload(db, &callbacks); 97 if (result != ISC_R_SUCCESS) 98 fatal("dns_db_endload failed: %s", isc_result_totext(result)); 99 } 100 101 static isc_result_t 102 loadset(const char *filename, dns_rdataset_t *rdataset) { 103 isc_result_t result; 104 dns_db_t *db = NULL; 105 dns_dbnode_t *node = NULL; 106 char setname[DNS_NAME_FORMATSIZE]; 107 108 dns_name_format(name, setname, sizeof(setname)); 109 110 result = dns_db_create(mctx, "rbt", name, dns_dbtype_zone, 111 rdclass, 0, NULL, &db); 112 if (result != ISC_R_SUCCESS) 113 fatal("can't create database"); 114 115 if (strcmp(filename, "-") == 0) { 116 db_load_from_stream(db, stdin); 117 filename = "input"; 118 } else { 119 result = dns_db_load(db, filename, dns_masterformat_text, 0); 120 if (result != ISC_R_SUCCESS && result != DNS_R_SEENINCLUDE) 121 fatal("can't load %s: %s", filename, 122 isc_result_totext(result)); 123 } 124 125 result = dns_db_findnode(db, name, false, &node); 126 if (result != ISC_R_SUCCESS) 127 fatal("can't find %s node in %s", setname, filename); 128 129 result = dns_db_findrdataset(db, node, NULL, dns_rdatatype_dnskey, 130 0, 0, rdataset, NULL); 131 132 if (result == ISC_R_NOTFOUND) 133 fatal("no DNSKEY RR for %s in %s", setname, filename); 134 else if (result != ISC_R_SUCCESS) 135 fatal("dns_db_findrdataset"); 136 137 if (node != NULL) 138 dns_db_detachnode(db, &node); 139 if (db != NULL) 140 dns_db_detach(&db); 141 return (result); 142 } 143 144 static isc_result_t 145 loadkeyset(char *dirname, dns_rdataset_t *rdataset) { 146 isc_result_t result; 147 char filename[PATH_MAX + 1]; 148 isc_buffer_t buf; 149 150 dns_rdataset_init(rdataset); 151 152 isc_buffer_init(&buf, filename, sizeof(filename)); 153 if (dirname != NULL) { 154 /* allow room for a trailing slash */ 155 if (strlen(dirname) >= isc_buffer_availablelength(&buf)) 156 return (ISC_R_NOSPACE); 157 isc_buffer_putstr(&buf, dirname); 158 if (dirname[strlen(dirname) - 1] != '/') 159 isc_buffer_putstr(&buf, "/"); 160 } 161 162 if (isc_buffer_availablelength(&buf) < 7) 163 return (ISC_R_NOSPACE); 164 isc_buffer_putstr(&buf, "keyset-"); 165 166 result = dns_name_tofilenametext(name, false, &buf); 167 check_result(result, "dns_name_tofilenametext()"); 168 if (isc_buffer_availablelength(&buf) == 0) 169 return (ISC_R_NOSPACE); 170 isc_buffer_putuint8(&buf, 0); 171 172 return (loadset(filename, rdataset)); 173 } 174 175 static void 176 loadkey(char *filename, unsigned char *key_buf, unsigned int key_buf_size, 177 dns_rdata_t *rdata) 178 { 179 isc_result_t result; 180 dst_key_t *key = NULL; 181 isc_buffer_t keyb; 182 isc_region_t r; 183 184 dns_rdata_init(rdata); 185 186 isc_buffer_init(&keyb, key_buf, key_buf_size); 187 188 result = dst_key_fromnamedfile(filename, NULL, DST_TYPE_PUBLIC, 189 mctx, &key); 190 if (result != ISC_R_SUCCESS) 191 fatal("can't load %s.key: %s", 192 filename, isc_result_totext(result)); 193 194 if (verbose > 2) { 195 char keystr[DST_KEY_FORMATSIZE]; 196 197 dst_key_format(key, keystr, sizeof(keystr)); 198 fprintf(stderr, "%s: %s\n", program, keystr); 199 } 200 201 result = dst_key_todns(key, &keyb); 202 if (result != ISC_R_SUCCESS) 203 fatal("can't decode key"); 204 205 isc_buffer_usedregion(&keyb, &r); 206 dns_rdata_fromregion(rdata, dst_key_class(key), 207 dns_rdatatype_dnskey, &r); 208 209 rdclass = dst_key_class(key); 210 211 name = dns_fixedname_initname(&fixed); 212 result = dns_name_copy(dst_key_name(key), name, NULL); 213 if (result != ISC_R_SUCCESS) 214 fatal("can't copy name"); 215 216 dst_key_free(&key); 217 } 218 219 static void 220 logkey(dns_rdata_t *rdata) 221 { 222 isc_result_t result; 223 dst_key_t *key = NULL; 224 isc_buffer_t buf; 225 char keystr[DST_KEY_FORMATSIZE]; 226 227 isc_buffer_init(&buf, rdata->data, rdata->length); 228 isc_buffer_add(&buf, rdata->length); 229 result = dst_key_fromdns(name, rdclass, &buf, mctx, &key); 230 if (result != ISC_R_SUCCESS) 231 return; 232 233 dst_key_format(key, keystr, sizeof(keystr)); 234 fprintf(stderr, "%s: %s\n", program, keystr); 235 236 dst_key_free(&key); 237 } 238 239 static void 240 emit(unsigned int dtype, bool showall, char *lookaside, 241 bool cds, dns_rdata_t *rdata) 242 { 243 isc_result_t result; 244 unsigned char buf[DNS_DS_BUFFERSIZE]; 245 char text_buf[DST_KEY_MAXTEXTSIZE]; 246 char name_buf[DNS_NAME_MAXWIRE]; 247 char class_buf[10]; 248 isc_buffer_t textb, nameb, classb; 249 isc_region_t r; 250 dns_rdata_t ds; 251 dns_rdata_dnskey_t dnskey; 252 253 isc_buffer_init(&textb, text_buf, sizeof(text_buf)); 254 isc_buffer_init(&nameb, name_buf, sizeof(name_buf)); 255 isc_buffer_init(&classb, class_buf, sizeof(class_buf)); 256 257 dns_rdata_init(&ds); 258 259 result = dns_rdata_tostruct(rdata, &dnskey, NULL); 260 if (result != ISC_R_SUCCESS) 261 fatal("can't convert DNSKEY"); 262 263 if ((dnskey.flags & DNS_KEYFLAG_KSK) == 0 && !showall) 264 return; 265 266 result = dns_ds_buildrdata(name, rdata, dtype, buf, &ds); 267 if (result != ISC_R_SUCCESS) 268 fatal("can't build record"); 269 270 result = dns_name_totext(name, false, &nameb); 271 if (result != ISC_R_SUCCESS) 272 fatal("can't print name"); 273 274 /* Add lookaside origin, if set */ 275 if (lookaside != NULL) { 276 if (isc_buffer_availablelength(&nameb) < strlen(lookaside)) 277 fatal("DLV origin '%s' is too long", lookaside); 278 isc_buffer_putstr(&nameb, lookaside); 279 if (lookaside[strlen(lookaside) - 1] != '.') { 280 if (isc_buffer_availablelength(&nameb) < 1) 281 fatal("DLV origin '%s' is too long", lookaside); 282 isc_buffer_putstr(&nameb, "."); 283 } 284 } 285 286 result = dns_rdata_tofmttext(&ds, (dns_name_t *) NULL, 0, 0, 0, "", 287 &textb); 288 289 if (result != ISC_R_SUCCESS) 290 fatal("can't print rdata"); 291 292 result = dns_rdataclass_totext(rdclass, &classb); 293 if (result != ISC_R_SUCCESS) 294 fatal("can't print class"); 295 296 isc_buffer_usedregion(&nameb, &r); 297 printf("%.*s ", (int)r.length, r.base); 298 299 if (emitttl) 300 printf("%u ", ttl); 301 302 isc_buffer_usedregion(&classb, &r); 303 printf("%.*s", (int)r.length, r.base); 304 305 if (lookaside == NULL) { 306 if (cds) 307 printf(" CDS "); 308 else 309 printf(" DS "); 310 } else 311 printf(" DLV "); 312 313 isc_buffer_usedregion(&textb, &r); 314 printf("%.*s\n", (int)r.length, r.base); 315 } 316 317 ISC_PLATFORM_NORETURN_PRE static void 318 usage(void) ISC_PLATFORM_NORETURN_POST; 319 320 static void 321 usage(void) { 322 fprintf(stderr, "Usage:\n"); 323 fprintf(stderr, " %s options [-K dir] keyfile\n\n", program); 324 fprintf(stderr, " %s options [-K dir] [-c class] -s dnsname\n\n", 325 program); 326 fprintf(stderr, " %s options -f zonefile (as zone name)\n\n", program); 327 fprintf(stderr, " %s options -f zonefile zonename\n\n", program); 328 fprintf(stderr, "Version: %s\n", VERSION); 329 fprintf(stderr, "Options:\n"); 330 fprintf(stderr, " -v <verbose level>\n"); 331 fprintf(stderr, " -V: print version information\n"); 332 fprintf(stderr, " -K <directory>: directory in which to find " 333 "key file or keyset file\n"); 334 fprintf(stderr, " -a algorithm: digest algorithm " 335 "(SHA-1, SHA-256 or SHA-384)\n"); 336 fprintf(stderr, " -1: use SHA-1\n"); 337 fprintf(stderr, " -2: use SHA-256\n"); 338 fprintf(stderr, " -C: print CDS record\n"); 339 fprintf(stderr, " -l: add lookaside zone and print DLV records\n"); 340 fprintf(stderr, " -s: read keyset from keyset-<dnsname> file\n"); 341 fprintf(stderr, " -c class: rdata class for DS set (default: IN)\n"); 342 fprintf(stderr, " -T TTL\n"); 343 fprintf(stderr, " -f file: read keyset from zone file\n"); 344 fprintf(stderr, " -A: when used with -f, " 345 "include all keys in DS set, not just KSKs\n"); 346 fprintf(stderr, "Output: DS or DLV RRs\n"); 347 348 exit (-1); 349 } 350 351 int 352 main(int argc, char **argv) { 353 char *classname = NULL; 354 char *filename = NULL, *dir = NULL, *namestr; 355 char *lookaside = NULL; 356 char *endp; 357 int ch; 358 unsigned int dtype = DNS_DSDIGEST_SHA1; 359 bool cds = false; 360 bool both = true; 361 bool usekeyset = false; 362 bool showall = false; 363 isc_result_t result; 364 isc_log_t *log = NULL; 365 dns_rdataset_t rdataset; 366 dns_rdata_t rdata; 367 368 dns_rdata_init(&rdata); 369 370 if (argc == 1) 371 usage(); 372 373 result = isc_mem_create(0, 0, &mctx); 374 if (result != ISC_R_SUCCESS) 375 fatal("out of memory"); 376 377 #if USE_PKCS11 378 pk11_result_register(); 379 #endif 380 dns_result_register(); 381 382 isc_commandline_errprint = false; 383 384 #define OPTIONS "12Aa:Cc:d:Ff:K:l:sT:v:hV" 385 while ((ch = isc_commandline_parse(argc, argv, OPTIONS)) != -1) { 386 switch (ch) { 387 case '1': 388 dtype = DNS_DSDIGEST_SHA1; 389 both = false; 390 break; 391 case '2': 392 dtype = DNS_DSDIGEST_SHA256; 393 both = false; 394 break; 395 case 'A': 396 showall = true; 397 break; 398 case 'a': 399 dtype = strtodsdigest(isc_commandline_argument); 400 both = false; 401 break; 402 case 'C': 403 if (lookaside != NULL) 404 fatal("lookaside and CDS are mutually" 405 " exclusive"); 406 cds = true; 407 break; 408 case 'c': 409 classname = isc_commandline_argument; 410 break; 411 case 'd': 412 fprintf(stderr, "%s: the -d option is deprecated; " 413 "use -K\n", program); 414 /* fall through */ 415 case 'K': 416 dir = isc_commandline_argument; 417 if (strlen(dir) == 0U) 418 fatal("directory must be non-empty string"); 419 break; 420 case 'f': 421 filename = isc_commandline_argument; 422 break; 423 case 'l': 424 if (cds) 425 fatal("lookaside and CDS are mutually" 426 " exclusive"); 427 lookaside = isc_commandline_argument; 428 if (strlen(lookaside) == 0U) 429 fatal("lookaside must be a non-empty string"); 430 break; 431 case 's': 432 usekeyset = true; 433 break; 434 case 'T': 435 emitttl = true; 436 ttl = strtottl(isc_commandline_argument); 437 break; 438 case 'v': 439 verbose = strtol(isc_commandline_argument, &endp, 0); 440 if (*endp != '\0') 441 fatal("-v must be followed by a number"); 442 break; 443 case 'F': 444 /* Reserved for FIPS mode */ 445 /* FALLTHROUGH */ 446 case '?': 447 if (isc_commandline_option != '?') 448 fprintf(stderr, "%s: invalid argument -%c\n", 449 program, isc_commandline_option); 450 /* FALLTHROUGH */ 451 case 'h': 452 /* Does not return. */ 453 usage(); 454 455 case 'V': 456 /* Does not return. */ 457 version(program); 458 459 default: 460 fprintf(stderr, "%s: unhandled option -%c\n", 461 program, isc_commandline_option); 462 exit(1); 463 } 464 } 465 466 rdclass = strtoclass(classname); 467 468 if (usekeyset && filename != NULL) 469 fatal("cannot use both -s and -f"); 470 471 /* When not using -f, -A is implicit */ 472 if (filename == NULL) 473 showall = true; 474 475 if (argc < isc_commandline_index + 1 && filename == NULL) 476 fatal("the key file name was not specified"); 477 if (argc > isc_commandline_index + 1) 478 fatal("extraneous arguments"); 479 480 result = dst_lib_init(mctx, NULL); 481 if (result != ISC_R_SUCCESS) 482 fatal("could not initialize dst: %s", 483 isc_result_totext(result)); 484 485 setup_logging(mctx, &log); 486 487 dns_rdataset_init(&rdataset); 488 489 if (usekeyset || filename != NULL) { 490 if (argc < isc_commandline_index + 1 && filename != NULL) { 491 /* using zone name as the zone file name */ 492 namestr = filename; 493 } else 494 namestr = argv[isc_commandline_index]; 495 496 result = initname(namestr); 497 if (result != ISC_R_SUCCESS) 498 fatal("could not initialize name %s", namestr); 499 500 if (usekeyset) 501 result = loadkeyset(dir, &rdataset); 502 else 503 result = loadset(filename, &rdataset); 504 505 if (result != ISC_R_SUCCESS) 506 fatal("could not load DNSKEY set: %s\n", 507 isc_result_totext(result)); 508 509 for (result = dns_rdataset_first(&rdataset); 510 result == ISC_R_SUCCESS; 511 result = dns_rdataset_next(&rdataset)) { 512 dns_rdata_init(&rdata); 513 dns_rdataset_current(&rdataset, &rdata); 514 515 if (verbose > 2) 516 logkey(&rdata); 517 518 if (both) { 519 emit(DNS_DSDIGEST_SHA1, showall, lookaside, 520 cds, &rdata); 521 emit(DNS_DSDIGEST_SHA256, showall, lookaside, 522 cds, &rdata); 523 } else 524 emit(dtype, showall, lookaside, cds, &rdata); 525 } 526 } else { 527 unsigned char key_buf[DST_KEY_MAXSIZE]; 528 529 loadkey(argv[isc_commandline_index], key_buf, 530 DST_KEY_MAXSIZE, &rdata); 531 532 if (both) { 533 emit(DNS_DSDIGEST_SHA1, showall, lookaside, cds, 534 &rdata); 535 emit(DNS_DSDIGEST_SHA256, showall, lookaside, cds, 536 &rdata); 537 } else 538 emit(dtype, showall, lookaside, cds, &rdata); 539 } 540 541 if (dns_rdataset_isassociated(&rdataset)) 542 dns_rdataset_disassociate(&rdataset); 543 cleanup_logging(&log); 544 dst_lib_destroy(); 545 dns_name_destroy(); 546 if (verbose > 10) 547 isc_mem_stats(mctx, stdout); 548 isc_mem_destroy(&mctx); 549 550 fflush(stdout); 551 if (ferror(stdout)) { 552 fprintf(stderr, "write error\n"); 553 return (1); 554 } else 555 return (0); 556 } 557
Indexes created Sun Oct 25 00:26:45 UTC 2026