external/bsd/bind/dist/bin/dnssec/dnssectool.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2004, 2005, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 2000, 2001, 2003  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Id: dnssectool.c,v 1.58 2009/10/26 23:47:35 tbox Exp */
  21
  22 /*! \file */
  23
  24 /*%
  25  * DNSSEC Support Routines.
  26  */
  27
  28 #include <config.h>
  29
  30 #include <stdlib.h>
  31
  32 #include <isc/buffer.h>
  33 #include <isc/dir.h>
  34 #include <isc/entropy.h>
  35 #include <isc/list.h>
  36 #include <isc/mem.h>
  37 #include <isc/string.h>
  38 #include <isc/time.h>
  39 #include <isc/util.h>
  40 #include <isc/print.h>
  41
  42 #include <dns/log.h>
  43 #include <dns/name.h>
  44 #include <dns/rdatastruct.h>
  45 #include <dns/rdataclass.h>
  46 #include <dns/rdatatype.h>
  47 #include <dns/result.h>
  48 #include <dns/secalg.h>
  49 #include <dns/time.h>
  50
  51 #include "dnssectool.h"
  52
  53 extern int verbose;
  54 extern const char *program;
  55
  56 typedef struct entropysource entropysource_t;
  57
  58 struct entropysource {
  59         isc_entropysource_t *source;
  60         isc_mem_t *mctx;
  61         ISC_LINK(entropysource_t) link;
  62 };
  63
  64 static ISC_LIST(entropysource_t) sources;
  65 static fatalcallback_t *fatalcallback = NULL;
  66
  67 void
  68 fatal(const char *format, ...) {
  69         va_list args;
  70
  71         fprintf(stderr, "%s: fatal: ", program);
  72         va_start(args, format);
  73         vfprintf(stderr, format, args);
  74         va_end(args);
  75         fprintf(stderr, "\n");
  76         if (fatalcallback != NULL)
  77                 (*fatalcallback)();
  78         exit(1);
  79 }
  80
  81 void
  82 setfatalcallback(fatalcallback_t *callback) {
  83         fatalcallback = callback;
  84 }
  85
  86 void
  87 check_result(isc_result_t result, const char *message) {
  88         if (result != ISC_R_SUCCESS)
  89                 fatal("%s: %s", message, isc_result_totext(result));
  90 }
  91
  92 void
  93 vbprintf(int level, const char *fmt, ...) {
  94         va_list ap;
  95         if (level > verbose)
  96                 return;
  97         va_start(ap, fmt);
  98         fprintf(stderr, "%s: ", program);
  99         vfprintf(stderr, fmt, ap);
 100         va_end(ap);
 101 }
 102
 103 void
 104 type_format(const dns_rdatatype_t type, char *cp, unsigned int size) {
 105         isc_buffer_t b;
 106         isc_region_t r;
 107         isc_result_t result;
 108
 109         isc_buffer_init(&b, cp, size - 1);
 110         result = dns_rdatatype_totext(type, &b);
 111         check_result(result, "dns_rdatatype_totext()");
 112         isc_buffer_usedregion(&b, &r);
 113         r.base[r.length] = 0;
 114 }
 115
 116 void
 117 sig_format(dns_rdata_rrsig_t *sig, char *cp, unsigned int size) {
 118         char namestr[DNS_NAME_FORMATSIZE];
 119         char algstr[DNS_NAME_FORMATSIZE];
 120
 121         dns_name_format(&sig->signer, namestr, sizeof(namestr));
 122         dns_secalg_format(sig->algorithm, algstr, sizeof(algstr));
 123         snprintf(cp, size, "%s/%s/%d", namestr, algstr, sig->keyid);
 124 }
 125
 126 void
 127 setup_logging(int verbose, isc_mem_t *mctx, isc_log_t **logp) {
 128         isc_result_t result;
 129         isc_logdestination_t destination;
 130         isc_logconfig_t *logconfig = NULL;
 131         isc_log_t *log = NULL;
 132         int level;
 133
 134         if (verbose < 0)
 135                 verbose = 0;
 136         switch (verbose) {
 137         case 0:
 138                 /*
 139                  * We want to see warnings about things like out-of-zone
 140                  * data in the master file even when not verbose.
 141                  */
 142                 level = ISC_LOG_WARNING;
 143                 break;
 144         case 1:
 145                 level = ISC_LOG_INFO;
 146                 break;
 147         default:
 148                 level = ISC_LOG_DEBUG(verbose - 2 + 1);
 149                 break;
 150         }
 151
 152         RUNTIME_CHECK(isc_log_create(mctx, &log, &logconfig) == ISC_R_SUCCESS);
 153         isc_log_setcontext(log);
 154         dns_log_init(log);
 155         dns_log_setcontext(log);
 156
 157         RUNTIME_CHECK(isc_log_settag(logconfig, program) == ISC_R_SUCCESS);
 158
 159         /*
 160          * Set up a channel similar to default_stderr except:
 161          *  - the logging level is passed in
 162          *  - the program name and logging level are printed
 163          *  - no time stamp is printed
 164          */
 165         destination.file.stream = stderr;
 166         destination.file.name = NULL;
 167         destination.file.versions = ISC_LOG_ROLLNEVER;
 168         destination.file.maximum_size = 0;
 169         result = isc_log_createchannel(logconfig, "stderr",
 170                                        ISC_LOG_TOFILEDESC,
 171                                        level,
 172                                        &destination,
 173                                        ISC_LOG_PRINTTAG|ISC_LOG_PRINTLEVEL);
 174         check_result(result, "isc_log_createchannel()");
 175
 176         RUNTIME_CHECK(isc_log_usechannel(logconfig, "stderr",
 177                                          NULL, NULL) == ISC_R_SUCCESS);
 178
 179         *logp = log;
 180 }
 181
 182 void
 183 cleanup_logging(isc_log_t **logp) {
 184         isc_log_t *log;
 185
 186         REQUIRE(logp != NULL);
 187
 188         log = *logp;
 189         if (log == NULL)
 190                 return;
 191         isc_log_destroy(&log);
 192         isc_log_setcontext(NULL);
 193         dns_log_setcontext(NULL);
 194         logp = NULL;
 195 }
 196
 197 void
 198 setup_entropy(isc_mem_t *mctx, const char *randomfile, isc_entropy_t **ectx) {
 199         isc_result_t result;
 200         isc_entropysource_t *source = NULL;
 201         entropysource_t *elt;
 202         int usekeyboard = ISC_ENTROPY_KEYBOARDMAYBE;
 203
 204         REQUIRE(ectx != NULL);
 205
 206         if (*ectx == NULL) {
 207                 result = isc_entropy_create(mctx, ectx);
 208                 if (result != ISC_R_SUCCESS)
 209                         fatal("could not create entropy object");
 210                 ISC_LIST_INIT(sources);
 211         }
 212
 213         if (randomfile != NULL && strcmp(randomfile, "keyboard") == 0) {
 214                 usekeyboard = ISC_ENTROPY_KEYBOARDYES;
 215                 randomfile = NULL;
 216         }
 217
 218         result = isc_entropy_usebestsource(*ectx, &source, randomfile,
 219                                            usekeyboard);
 220
 221         if (result != ISC_R_SUCCESS)
 222                 fatal("could not initialize entropy source: %s",
 223                       isc_result_totext(result));
 224
 225         if (source != NULL) {
 226                 elt = isc_mem_get(mctx, sizeof(*elt));
 227                 if (elt == NULL)
 228                         fatal("out of memory");
 229                 elt->source = source;
 230                 elt->mctx = mctx;
 231                 ISC_LINK_INIT(elt, link);
 232                 ISC_LIST_APPEND(sources, elt, link);
 233         }
 234 }
 235
 236 void
 237 cleanup_entropy(isc_entropy_t **ectx) {
 238         entropysource_t *source;
 239         while (!ISC_LIST_EMPTY(sources)) {
 240                 source = ISC_LIST_HEAD(sources);
 241                 ISC_LIST_UNLINK(sources, source, link);
 242                 isc_entropy_destroysource(&source->source);
 243                 isc_mem_put(source->mctx, source, sizeof(*source));
 244         }
 245         isc_entropy_detach(ectx);
 246 }
 247
 248 static isc_stdtime_t
 249 time_units(isc_stdtime_t offset, char *suffix, const char *str) {
 250         switch (suffix[0]) {
 251             case 'Y': case 'y':
 252                 return (offset * (365 * 24 * 3600));
 253             case 'M': case 'm':
 254                 switch (suffix[1]) {
 255                     case 'O': case 'o':
 256                         return (offset * (30 * 24 * 3600));
 257                     case 'I': case 'i':
 258                         return (offset * 60);
 259                     case '\0':
 260                         fatal("'%s' ambiguous: use 'mi' for minutes "
 261                               "or 'mo' for months", str);
 262                     default:
 263                         fatal("time value %s is invalid", str);
 264                 }
 265                 /* NOTREACHED */
 266                 break;
 267             case 'W': case 'w':
 268                 return (offset * (7 * 24 * 3600));
 269             case 'D': case 'd':
 270                 return (offset * (24 * 3600));
 271             case 'H': case 'h':
 272                 return (offset * 3600);
 273             case 'S': case 's': case '\0':
 274                 return (offset);
 275             default:
 276                 fatal("time value %s is invalid", str);
 277         }
 278         /* NOTREACHED */
 279         return(0); /* silence compiler warning */
 280 }
 281
 282 dns_ttl_t
 283 strtottl(const char *str) {
 284         const char *orig = str;
 285         dns_ttl_t ttl;
 286         char *endp;
 287
 288         ttl = strtol(str, &endp, 0);
 289         if (ttl == 0 && endp == str)
 290                 fatal("TTL must be numeric");
 291         ttl = time_units(ttl, endp, orig);
 292         return (ttl);
 293 }
 294
 295 isc_stdtime_t
 296 strtotime(const char *str, isc_int64_t now, isc_int64_t base) {
 297         isc_int64_t val, offset;
 298         isc_result_t result;
 299         const char *orig = str;
 300         char *endp;
 301
 302         if ((str[0] == '0' || str[0] == '-') && str[1] == '\0')
 303                 return ((isc_stdtime_t) 0);
 304
 305         if (strncmp(str, "now", 3) == 0) {
 306                 base = now;
 307                 str += 3;
 308         }
 309
 310         if (str[0] == '\0')
 311                 return ((isc_stdtime_t) base);
 312         else if (str[0] == '+') {
 313                 offset = strtol(str + 1, &endp, 0);
 314                 offset = time_units((isc_stdtime_t) offset, endp, orig);
 315                 val = base + offset;
 316         } else if (str[0] == '-') {
 317                 offset = strtol(str + 1, &endp, 0);
 318                 offset = time_units((isc_stdtime_t) offset, endp, orig);
 319                 val = base - offset;
 320         } else if (strlen(str) == 8U) {
 321                 char timestr[15];
 322                 sprintf(timestr, "%s000000", str);
 323                 result = dns_time64_fromtext(timestr, &val);
 324                 if (result != ISC_R_SUCCESS)
 325                         fatal("time value %s is invalid: %s", orig,
 326                               isc_result_totext(result));
 327         } else if (strlen(str) > 14U) {
 328                 fatal("time value %s is invalid", orig);
 329         } else {
 330                 result = dns_time64_fromtext(str, &val);
 331                 if (result != ISC_R_SUCCESS)
 332                         fatal("time value %s is invalid: %s", orig,
 333                               isc_result_totext(result));
 334         }
 335
 336         return ((isc_stdtime_t) val);
 337 }
 338
 339 dns_rdataclass_t
 340 strtoclass(const char *str) {
 341         isc_textregion_t r;
 342         dns_rdataclass_t rdclass;
 343         isc_result_t ret;
 344
 345         if (str == NULL)
 346                 return dns_rdataclass_in;
 347         DE_CONST(str, r.base);
 348         r.length = strlen(str);
 349         ret = dns_rdataclass_fromtext(&rdclass, &r);
 350         if (ret != ISC_R_SUCCESS)
 351                 fatal("unknown class %s", str);
 352         return (rdclass);
 353 }
 354
 355 isc_result_t
 356 try_dir(const char *dirname) {
 357         isc_result_t result;
 358         isc_dir_t d;
 359
 360         isc_dir_init(&d);
 361         result = isc_dir_open(&d, dirname);
 362         if (result == ISC_R_SUCCESS) {
 363                 isc_dir_close(&d);
 364         }
 365         return (result);
 366 }
 367
 368 /*
 369  * Check private key version compatibility.
 370  */
 371 void
 372 check_keyversion(dst_key_t *key, char *keystr) {
 373         int major, minor;
 374         dst_key_getprivateformat(key, &major, &minor);
 375         INSIST(major <= DST_MAJOR_VERSION); /* invalid private key */
 376
 377         if (major < DST_MAJOR_VERSION || minor < DST_MINOR_VERSION)
 378                 fatal("Key %s has incompatible format version %d.%d, "
 379                       "use -f to force upgrade to new version.",
 380                       keystr, major, minor);
 381         if (minor > DST_MINOR_VERSION)
 382                 fatal("Key %s has incompatible format version %d.%d, "
 383                       "use -f to force downgrade to current version.",
 384                       keystr, major, minor);
 385 }
 386
 387 void
 388 set_keyversion(dst_key_t *key) {
 389         int major, minor;
 390         dst_key_getprivateformat(key, &major, &minor);
 391         INSIST(major <= DST_MAJOR_VERSION);
 392
 393         if (major != DST_MAJOR_VERSION || minor != DST_MINOR_VERSION)
 394                 dst_key_setprivateformat(key, DST_MAJOR_VERSION,
 395                                          DST_MINOR_VERSION);
 396
 397         /*
 398          * If the key is from a version older than 1.3, set
 399          * set the creation date
 400          */
 401         if (major < 1 || (major == 1 && minor <= 2)) {
 402                 isc_stdtime_t now;
 403                 isc_stdtime_get(&now);
 404                 dst_key_settime(key, DST_TIME_CREATED, now);
 405         }
 406 }