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/contrib/bind9/bin/dnssec/dnssec-keygen.c

https://bitbucket.org/freebsd/freebsd-head/
C | 1030 lines | 869 code | 94 blank | 67 comment | 376 complexity | 8c3555d71d0311d23bb8be6dc8d3fe90 MD5 | raw file
   1/*
   2 * Portions Copyright (C) 2004-2011  Internet Systems Consortium, Inc. ("ISC")
   3 * Portions Copyright (C) 1999-2003  Internet Software Consortium.
   4 *
   5 * Permission to use, copy, modify, and/or distribute this software for any
   6 * purpose with or without fee is hereby granted, provided that the above
   7 * copyright notice and this permission notice appear in all copies.
   8 *
   9 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
  10 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
  11 * WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE
  12 * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
  15 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16 *
  17 * Portions Copyright (C) 1995-2000 by Network Associates, Inc.
  18 *
  19 * Permission to use, copy, modify, and/or distribute this software for any
  20 * purpose with or without fee is hereby granted, provided that the above
  21 * copyright notice and this permission notice appear in all copies.
  22 *
  23 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NETWORK ASSOCIATES DISCLAIMS
  24 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
  25 * WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE
  26 * FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  27 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  28 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
  29 * IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  30 */
  31
  32/* $Id: dnssec-keygen.c,v 1.115.14.4 2011/11/30 00:51:38 marka Exp $ */
  33
  34/*! \file */
  35
  36#include <config.h>
  37
  38#include <ctype.h>
  39#include <stdlib.h>
  40#include <unistd.h>
  41
  42#include <isc/buffer.h>
  43#include <isc/commandline.h>
  44#include <isc/entropy.h>
  45#include <isc/mem.h>
  46#include <isc/region.h>
  47#include <isc/string.h>
  48#include <isc/util.h>
  49
  50#include <dns/dnssec.h>
  51#include <dns/fixedname.h>
  52#include <dns/keyvalues.h>
  53#include <dns/log.h>
  54#include <dns/name.h>
  55#include <dns/rdataclass.h>
  56#include <dns/result.h>
  57#include <dns/secalg.h>
  58
  59#include <dst/dst.h>
  60
  61#include "dnssectool.h"
  62
  63#define MAX_RSA 4096 /* should be long enough... */
  64
  65const char *program = "dnssec-keygen";
  66int verbose;
  67
  68#define DEFAULT_ALGORITHM "RSASHA1"
  69#define DEFAULT_NSEC3_ALGORITHM "NSEC3RSASHA1"
  70
  71ISC_PLATFORM_NORETURN_PRE static void
  72usage(void) ISC_PLATFORM_NORETURN_POST;
  73
  74static void progress(int p);
  75
  76static void
  77usage(void) {
  78	fprintf(stderr, "Usage:\n");
  79	fprintf(stderr, "    %s [options] name\n\n", program);
  80	fprintf(stderr, "Version: %s\n", VERSION);
  81	fprintf(stderr, "    name: owner of the key\n");
  82	fprintf(stderr, "Options:\n");
  83	fprintf(stderr, "    -K <directory>: write keys into directory\n");
  84	fprintf(stderr, "    -a <algorithm>:\n");
  85	fprintf(stderr, "        RSA | RSAMD5 | DSA | RSASHA1 | NSEC3RSASHA1"
  86				" | NSEC3DSA |\n");
  87	fprintf(stderr, "        RSASHA256 | RSASHA512 | ECCGOST |\n");
  88	fprintf(stderr, "        DH | HMAC-MD5 | HMAC-SHA1 | HMAC-SHA224 | "
  89				"HMAC-SHA256 | \n");
  90	fprintf(stderr, "        HMAC-SHA384 | HMAC-SHA512\n");
  91	fprintf(stderr, "       (default: RSASHA1, or "
  92			       "NSEC3RSASHA1 if using -3)\n");
  93	fprintf(stderr, "    -3: use NSEC3-capable algorithm\n");
  94	fprintf(stderr, "    -b <key size in bits>:\n");
  95	fprintf(stderr, "        RSAMD5:\t[512..%d]\n", MAX_RSA);
  96	fprintf(stderr, "        RSASHA1:\t[512..%d]\n", MAX_RSA);
  97	fprintf(stderr, "        NSEC3RSASHA1:\t[512..%d]\n", MAX_RSA);
  98	fprintf(stderr, "        RSASHA256:\t[512..%d]\n", MAX_RSA);
  99	fprintf(stderr, "        RSASHA512:\t[1024..%d]\n", MAX_RSA);
 100	fprintf(stderr, "        DH:\t\t[128..4096]\n");
 101	fprintf(stderr, "        DSA:\t\t[512..1024] and divisible by 64\n");
 102	fprintf(stderr, "        NSEC3DSA:\t[512..1024] and divisible "
 103				"by 64\n");
 104	fprintf(stderr, "        ECCGOST:\tignored\n");
 105	fprintf(stderr, "        HMAC-MD5:\t[1..512]\n");
 106	fprintf(stderr, "        HMAC-SHA1:\t[1..160]\n");
 107	fprintf(stderr, "        HMAC-SHA224:\t[1..224]\n");
 108	fprintf(stderr, "        HMAC-SHA256:\t[1..256]\n");
 109	fprintf(stderr, "        HMAC-SHA384:\t[1..384]\n");
 110	fprintf(stderr, "        HMAC-SHA512:\t[1..512]\n");
 111	fprintf(stderr, "        (if using the default algorithm, key size\n"
 112			"        defaults to 2048 for KSK, or 1024 for all "
 113			"others)\n");
 114	fprintf(stderr, "    -n <nametype>: ZONE | HOST | ENTITY | "
 115					    "USER | OTHER\n");
 116	fprintf(stderr, "        (DNSKEY generation defaults to ZONE)\n");
 117	fprintf(stderr, "    -c <class>: (default: IN)\n");
 118	fprintf(stderr, "    -d <digest bits> (0 => max, default)\n");
 119#ifdef USE_PKCS11
 120	fprintf(stderr, "    -E <engine name> (default \"pkcs11\")\n");
 121#else
 122	fprintf(stderr, "    -E <engine name>\n");
 123#endif
 124	fprintf(stderr, "    -e: use large exponent (RSAMD5/RSASHA1 only)\n");
 125	fprintf(stderr, "    -f <keyflag>: KSK | REVOKE\n");
 126	fprintf(stderr, "    -g <generator>: use specified generator "
 127			"(DH only)\n");
 128	fprintf(stderr, "    -p <protocol>: (default: 3 [dnssec])\n");
 129	fprintf(stderr, "    -s <strength>: strength value this key signs DNS "
 130			"records with (default: 0)\n");
 131	fprintf(stderr, "    -T <rrtype>: DNSKEY | KEY (default: DNSKEY; "
 132			"use KEY for SIG(0))\n");
 133	fprintf(stderr, "        ECCGOST:\tignored\n");
 134	fprintf(stderr, "    -t <type>: "
 135			"AUTHCONF | NOAUTHCONF | NOAUTH | NOCONF "
 136			"(default: AUTHCONF)\n");
 137	fprintf(stderr, "    -r <randomdev>: a file containing random data\n");
 138
 139	fprintf(stderr, "    -h: print usage and exit\n");
 140	fprintf(stderr, "    -m <memory debugging mode>:\n");
 141	fprintf(stderr, "       usage | trace | record | size | mctx\n");
 142	fprintf(stderr, "    -v <level>: set verbosity level (0 - 10)\n");
 143	fprintf(stderr, "Timing options:\n");
 144	fprintf(stderr, "    -P date/[+-]offset/none: set key publication date "
 145						"(default: now)\n");
 146	fprintf(stderr, "    -A date/[+-]offset/none: set key activation date "
 147						"(default: now)\n");
 148	fprintf(stderr, "    -R date/[+-]offset/none: set key "
 149						     "revocation date\n");
 150	fprintf(stderr, "    -I date/[+-]offset/none: set key "
 151						     "inactivation date\n");
 152	fprintf(stderr, "    -D date/[+-]offset/none: set key deletion date\n");
 153	fprintf(stderr, "    -G: generate key only; do not set -P or -A\n");
 154	fprintf(stderr, "    -C: generate a backward-compatible key, omitting "
 155			"all dates\n");
 156	fprintf(stderr, "    -S <key>: generate a successor to an existing "
 157				      "key\n");
 158	fprintf(stderr, "    -i <interval>: prepublication interval for "
 159					   "successor key "
 160					   "(default: 30 days)\n");
 161	fprintf(stderr, "Output:\n");
 162	fprintf(stderr, "     K<name>+<alg>+<id>.key, "
 163			"K<name>+<alg>+<id>.private\n");
 164
 165	exit (-1);
 166}
 167
 168static isc_boolean_t
 169dsa_size_ok(int size) {
 170	return (ISC_TF(size >= 512 && size <= 1024 && size % 64 == 0));
 171}
 172
 173static void
 174progress(int p)
 175{
 176	char c = '*';
 177
 178	switch (p) {
 179	case 0:
 180		c = '.';
 181		break;
 182	case 1:
 183		c = '+';
 184		break;
 185	case 2:
 186		c = '*';
 187		break;
 188	case 3:
 189		c = ' ';
 190		break;
 191	default:
 192		break;
 193	}
 194	(void) putc(c, stderr);
 195	(void) fflush(stderr);
 196}
 197
 198int
 199main(int argc, char **argv) {
 200	char		*algname = NULL, *freeit = NULL;
 201	char		*nametype = NULL, *type = NULL;
 202	char		*classname = NULL;
 203	char		*endp;
 204	dst_key_t	*key = NULL;
 205	dns_fixedname_t	fname;
 206	dns_name_t	*name;
 207	isc_uint16_t	flags = 0, kskflag = 0, revflag = 0;
 208	dns_secalg_t	alg;
 209	isc_boolean_t	conflict = ISC_FALSE, null_key = ISC_FALSE;
 210	isc_boolean_t	oldstyle = ISC_FALSE;
 211	isc_mem_t	*mctx = NULL;
 212	int		ch, rsa_exp = 0, generator = 0, param = 0;
 213	int		protocol = -1, size = -1, signatory = 0;
 214	isc_result_t	ret;
 215	isc_textregion_t r;
 216	char		filename[255];
 217	const char	*directory = NULL;
 218	const char	*predecessor = NULL;
 219	dst_key_t	*prevkey = NULL;
 220	isc_buffer_t	buf;
 221	isc_log_t	*log = NULL;
 222	isc_entropy_t	*ectx = NULL;
 223#ifdef USE_PKCS11
 224	const char	*engine = "pkcs11";
 225#else
 226	const char	*engine = NULL;
 227#endif
 228	dns_rdataclass_t rdclass;
 229	int		options = DST_TYPE_PRIVATE | DST_TYPE_PUBLIC;
 230	int		dbits = 0;
 231	isc_boolean_t	use_default = ISC_FALSE, use_nsec3 = ISC_FALSE;
 232	isc_stdtime_t	publish = 0, activate = 0, revoke = 0;
 233	isc_stdtime_t	inactive = 0, delete = 0;
 234	isc_stdtime_t	now;
 235	int		prepub = -1;
 236	isc_boolean_t	setpub = ISC_FALSE, setact = ISC_FALSE;
 237	isc_boolean_t	setrev = ISC_FALSE, setinact = ISC_FALSE;
 238	isc_boolean_t	setdel = ISC_FALSE;
 239	isc_boolean_t	unsetpub = ISC_FALSE, unsetact = ISC_FALSE;
 240	isc_boolean_t	unsetrev = ISC_FALSE, unsetinact = ISC_FALSE;
 241	isc_boolean_t	unsetdel = ISC_FALSE;
 242	isc_boolean_t	genonly = ISC_FALSE;
 243	isc_boolean_t	quiet = ISC_FALSE;
 244	isc_boolean_t	show_progress = ISC_FALSE;
 245	unsigned char	c;
 246
 247	if (argc == 1)
 248		usage();
 249
 250	dns_result_register();
 251
 252	isc_commandline_errprint = ISC_FALSE;
 253
 254	/*
 255	 * Process memory debugging argument first.
 256	 */
 257#define CMDLINE_FLAGS "3A:a:b:Cc:D:d:E:eFf:Gg:hI:i:K:km:n:P:p:qR:r:S:s:T:t:v:"
 258	while ((ch = isc_commandline_parse(argc, argv, CMDLINE_FLAGS)) != -1) {
 259		switch (ch) {
 260		case 'm':
 261			if (strcasecmp(isc_commandline_argument, "record") == 0)
 262				isc_mem_debugging |= ISC_MEM_DEBUGRECORD;
 263			if (strcasecmp(isc_commandline_argument, "trace") == 0)
 264				isc_mem_debugging |= ISC_MEM_DEBUGTRACE;
 265			if (strcasecmp(isc_commandline_argument, "usage") == 0)
 266				isc_mem_debugging |= ISC_MEM_DEBUGUSAGE;
 267			if (strcasecmp(isc_commandline_argument, "size") == 0)
 268				isc_mem_debugging |= ISC_MEM_DEBUGSIZE;
 269			if (strcasecmp(isc_commandline_argument, "mctx") == 0)
 270				isc_mem_debugging |= ISC_MEM_DEBUGCTX;
 271			break;
 272		default:
 273			break;
 274		}
 275	}
 276	isc_commandline_reset = ISC_TRUE;
 277
 278	RUNTIME_CHECK(isc_mem_create(0, 0, &mctx) == ISC_R_SUCCESS);
 279
 280	isc_stdtime_get(&now);
 281
 282	while ((ch = isc_commandline_parse(argc, argv, CMDLINE_FLAGS)) != -1) {
 283	    switch (ch) {
 284		case '3':
 285			use_nsec3 = ISC_TRUE;
 286			break;
 287		case 'a':
 288			algname = isc_commandline_argument;
 289			break;
 290		case 'b':
 291			size = strtol(isc_commandline_argument, &endp, 10);
 292			if (*endp != '\0' || size < 0)
 293				fatal("-b requires a non-negative number");
 294			break;
 295		case 'C':
 296			oldstyle = ISC_TRUE;
 297			break;
 298		case 'c':
 299			classname = isc_commandline_argument;
 300			break;
 301		case 'd':
 302			dbits = strtol(isc_commandline_argument, &endp, 10);
 303			if (*endp != '\0' || dbits < 0)
 304				fatal("-d requires a non-negative number");
 305			break;
 306		case 'E':
 307			engine = isc_commandline_argument;
 308			break;
 309		case 'e':
 310			rsa_exp = 1;
 311			break;
 312		case 'f':
 313			c = (unsigned char)(isc_commandline_argument[0]);
 314			if (toupper(c) == 'K')
 315				kskflag = DNS_KEYFLAG_KSK;
 316			else if (toupper(c) == 'R')
 317				revflag = DNS_KEYFLAG_REVOKE;
 318			else
 319				fatal("unknown flag '%s'",
 320				      isc_commandline_argument);
 321			break;
 322		case 'g':
 323			generator = strtol(isc_commandline_argument,
 324					   &endp, 10);
 325			if (*endp != '\0' || generator <= 0)
 326				fatal("-g requires a positive number");
 327			break;
 328		case 'K':
 329			directory = isc_commandline_argument;
 330			ret = try_dir(directory);
 331			if (ret != ISC_R_SUCCESS)
 332				fatal("cannot open directory %s: %s",
 333				      directory, isc_result_totext(ret));
 334			break;
 335		case 'k':
 336			fatal("The -k option has been deprecated.\n"
 337			      "To generate a key-signing key, use -f KSK.\n"
 338			      "To generate a key with TYPE=KEY, use -T KEY.\n");
 339			break;
 340		case 'n':
 341			nametype = isc_commandline_argument;
 342			break;
 343		case 'm':
 344			break;
 345		case 'p':
 346			protocol = strtol(isc_commandline_argument, &endp, 10);
 347			if (*endp != '\0' || protocol < 0 || protocol > 255)
 348				fatal("-p must be followed by a number "
 349				      "[0..255]");
 350			break;
 351		case 'q':
 352			quiet = ISC_TRUE;
 353			break;
 354		case 'r':
 355			setup_entropy(mctx, isc_commandline_argument, &ectx);
 356			break;
 357		case 's':
 358			signatory = strtol(isc_commandline_argument,
 359					   &endp, 10);
 360			if (*endp != '\0' || signatory < 0 || signatory > 15)
 361				fatal("-s must be followed by a number "
 362				      "[0..15]");
 363			break;
 364		case 'T':
 365			if (strcasecmp(isc_commandline_argument, "KEY") == 0)
 366				options |= DST_TYPE_KEY;
 367			else if (strcasecmp(isc_commandline_argument,
 368				 "DNSKEY") == 0)
 369				/* default behavior */
 370				;
 371			else
 372				fatal("unknown type '%s'",
 373				      isc_commandline_argument);
 374			break;
 375		case 't':
 376			type = isc_commandline_argument;
 377			break;
 378		case 'v':
 379			endp = NULL;
 380			verbose = strtol(isc_commandline_argument, &endp, 0);
 381			if (*endp != '\0')
 382				fatal("-v must be followed by a number");
 383			break;
 384		case 'z':
 385			/* already the default */
 386			break;
 387		case 'G':
 388			genonly = ISC_TRUE;
 389			break;
 390		case 'P':
 391			if (setpub || unsetpub)
 392				fatal("-P specified more than once");
 393
 394			if (strcasecmp(isc_commandline_argument, "none")) {
 395				setpub = ISC_TRUE;
 396				publish = strtotime(isc_commandline_argument,
 397						    now, now);
 398			} else {
 399				unsetpub = ISC_TRUE;
 400			}
 401			break;
 402		case 'A':
 403			if (setact || unsetact)
 404				fatal("-A specified more than once");
 405
 406			if (strcasecmp(isc_commandline_argument, "none")) {
 407				setact = ISC_TRUE;
 408				activate = strtotime(isc_commandline_argument,
 409						     now, now);
 410			} else {
 411				unsetact = ISC_TRUE;
 412			}
 413			break;
 414		case 'R':
 415			if (setrev || unsetrev)
 416				fatal("-R specified more than once");
 417
 418			if (strcasecmp(isc_commandline_argument, "none")) {
 419				setrev = ISC_TRUE;
 420				revoke = strtotime(isc_commandline_argument,
 421						   now, now);
 422			} else {
 423				unsetrev = ISC_TRUE;
 424			}
 425			break;
 426		case 'I':
 427			if (setinact || unsetinact)
 428				fatal("-I specified more than once");
 429
 430			if (strcasecmp(isc_commandline_argument, "none")) {
 431				setinact = ISC_TRUE;
 432				inactive = strtotime(isc_commandline_argument,
 433						     now, now);
 434			} else {
 435				unsetinact = ISC_TRUE;
 436			}
 437			break;
 438		case 'D':
 439			if (setdel || unsetdel)
 440				fatal("-D specified more than once");
 441
 442			if (strcasecmp(isc_commandline_argument, "none")) {
 443				setdel = ISC_TRUE;
 444				delete = strtotime(isc_commandline_argument,
 445						   now, now);
 446			} else {
 447				unsetdel = ISC_TRUE;
 448			}
 449			break;
 450		case 'S':
 451			predecessor = isc_commandline_argument;
 452			break;
 453		case 'i':
 454			prepub = strtottl(isc_commandline_argument);
 455			break;
 456		case 'F':
 457			/* Reserved for FIPS mode */
 458			/* FALLTHROUGH */
 459		case '?':
 460			if (isc_commandline_option != '?')
 461				fprintf(stderr, "%s: invalid argument -%c\n",
 462					program, isc_commandline_option);
 463			/* FALLTHROUGH */
 464		case 'h':
 465			usage();
 466
 467		default:
 468			fprintf(stderr, "%s: unhandled option -%c\n",
 469				program, isc_commandline_option);
 470			exit(1);
 471		}
 472	}
 473
 474	if (!isatty(0))
 475		quiet = ISC_TRUE;
 476
 477	if (ectx == NULL)
 478		setup_entropy(mctx, NULL, &ectx);
 479	ret = dst_lib_init2(mctx, ectx, engine,
 480			    ISC_ENTROPY_BLOCKING | ISC_ENTROPY_GOODONLY);
 481	if (ret != ISC_R_SUCCESS)
 482		fatal("could not initialize dst: %s",
 483		      isc_result_totext(ret));
 484
 485	setup_logging(verbose, mctx, &log);
 486
 487	if (predecessor == NULL) {
 488		if (prepub == -1)
 489			prepub = 0;
 490
 491		if (argc < isc_commandline_index + 1)
 492			fatal("the key name was not specified");
 493		if (argc > isc_commandline_index + 1)
 494			fatal("extraneous arguments");
 495
 496		dns_fixedname_init(&fname);
 497		name = dns_fixedname_name(&fname);
 498		isc_buffer_init(&buf, argv[isc_commandline_index],
 499				strlen(argv[isc_commandline_index]));
 500		isc_buffer_add(&buf, strlen(argv[isc_commandline_index]));
 501		ret = dns_name_fromtext(name, &buf, dns_rootname, 0, NULL);
 502		if (ret != ISC_R_SUCCESS)
 503			fatal("invalid key name %s: %s",
 504			      argv[isc_commandline_index],
 505			      isc_result_totext(ret));
 506
 507		if (algname == NULL) {
 508			use_default = ISC_TRUE;
 509			if (use_nsec3)
 510				algname = strdup(DEFAULT_NSEC3_ALGORITHM);
 511			else
 512				algname = strdup(DEFAULT_ALGORITHM);
 513			if (algname == NULL)
 514				fatal("strdup failed");
 515			freeit = algname;
 516			if (verbose > 0)
 517				fprintf(stderr, "no algorithm specified; "
 518						"defaulting to %s\n", algname);
 519		}
 520
 521		if (strcasecmp(algname, "RSA") == 0) {
 522			fprintf(stderr, "The use of RSA (RSAMD5) is not "
 523					"recommended.\nIf you still wish to "
 524					"use RSA (RSAMD5) please specify "
 525					"\"-a RSAMD5\"\n");
 526			return (1);
 527		} else if (strcasecmp(algname, "HMAC-MD5") == 0)
 528			alg = DST_ALG_HMACMD5;
 529		else if (strcasecmp(algname, "HMAC-SHA1") == 0)
 530			alg = DST_ALG_HMACSHA1;
 531		else if (strcasecmp(algname, "HMAC-SHA224") == 0)
 532			alg = DST_ALG_HMACSHA224;
 533		else if (strcasecmp(algname, "HMAC-SHA256") == 0)
 534			alg = DST_ALG_HMACSHA256;
 535		else if (strcasecmp(algname, "HMAC-SHA384") == 0)
 536			alg = DST_ALG_HMACSHA384;
 537		else if (strcasecmp(algname, "HMAC-SHA512") == 0)
 538			alg = DST_ALG_HMACSHA512;
 539		else {
 540			r.base = algname;
 541			r.length = strlen(algname);
 542			ret = dns_secalg_fromtext(&alg, &r);
 543			if (ret != ISC_R_SUCCESS)
 544				fatal("unknown algorithm %s", algname);
 545			if (alg == DST_ALG_DH)
 546				options |= DST_TYPE_KEY;
 547		}
 548
 549		if (use_nsec3 &&
 550		    alg != DST_ALG_NSEC3DSA && alg != DST_ALG_NSEC3RSASHA1 &&
 551		    alg != DST_ALG_RSASHA256 && alg!= DST_ALG_RSASHA512 &&
 552		    alg != DST_ALG_ECCGOST) {
 553			fatal("%s is incompatible with NSEC3; "
 554			      "do not use the -3 option", algname);
 555		}
 556
 557		if (type != NULL && (options & DST_TYPE_KEY) != 0) {
 558			if (strcasecmp(type, "NOAUTH") == 0)
 559				flags |= DNS_KEYTYPE_NOAUTH;
 560			else if (strcasecmp(type, "NOCONF") == 0)
 561				flags |= DNS_KEYTYPE_NOCONF;
 562			else if (strcasecmp(type, "NOAUTHCONF") == 0) {
 563				flags |= (DNS_KEYTYPE_NOAUTH |
 564					  DNS_KEYTYPE_NOCONF);
 565				if (size < 0)
 566					size = 0;
 567			}
 568			else if (strcasecmp(type, "AUTHCONF") == 0)
 569				/* nothing */;
 570			else
 571				fatal("invalid type %s", type);
 572		}
 573
 574		if (size < 0) {
 575			if (use_default) {
 576				if ((kskflag & DNS_KEYFLAG_KSK) != 0)
 577					size = 2048;
 578				else
 579					size = 1024;
 580				if (verbose > 0)
 581					fprintf(stderr, "key size not "
 582							"specified; defaulting "
 583							"to %d\n", size);
 584			} else if (alg != DST_ALG_ECCGOST)
 585				fatal("key size not specified (-b option)");
 586		}
 587
 588		if (!oldstyle && prepub > 0) {
 589			if (setpub && setact && (activate - prepub) < publish)
 590				fatal("Activation and publication dates "
 591				      "are closer together than the\n\t"
 592				      "prepublication interval.");
 593
 594			if (!setpub && !setact) {
 595				setpub = setact = ISC_TRUE;
 596				publish = now;
 597				activate = now + prepub;
 598			} else if (setpub && !setact) {
 599				setact = ISC_TRUE;
 600				activate = publish + prepub;
 601			} else if (setact && !setpub) {
 602				setpub = ISC_TRUE;
 603				publish = activate - prepub;
 604			}
 605
 606			if ((activate - prepub) < now)
 607				fatal("Time until activation is shorter "
 608				      "than the\n\tprepublication interval.");
 609		}
 610	} else {
 611		char keystr[DST_KEY_FORMATSIZE];
 612		isc_stdtime_t when;
 613		int major, minor;
 614
 615		if (prepub == -1)
 616			prepub = (30 * 86400);
 617
 618		if (algname != NULL)
 619			fatal("-S and -a cannot be used together");
 620		if (size >= 0)
 621			fatal("-S and -b cannot be used together");
 622		if (nametype != NULL)
 623			fatal("-S and -n cannot be used together");
 624		if (type != NULL)
 625			fatal("-S and -t cannot be used together");
 626		if (setpub || unsetpub)
 627			fatal("-S and -P cannot be used together");
 628		if (setact || unsetact)
 629			fatal("-S and -A cannot be used together");
 630		if (use_nsec3)
 631			fatal("-S and -3 cannot be used together");
 632		if (oldstyle)
 633			fatal("-S and -C cannot be used together");
 634		if (genonly)
 635			fatal("-S and -G cannot be used together");
 636
 637		ret = dst_key_fromnamedfile(predecessor, directory,
 638					    DST_TYPE_PUBLIC | DST_TYPE_PRIVATE,
 639					    mctx, &prevkey);
 640		if (ret != ISC_R_SUCCESS)
 641			fatal("Invalid keyfile %s: %s",
 642			      filename, isc_result_totext(ret));
 643		if (!dst_key_isprivate(prevkey))
 644			fatal("%s is not a private key", filename);
 645
 646		name = dst_key_name(prevkey);
 647		alg = dst_key_alg(prevkey);
 648		size = dst_key_size(prevkey);
 649		flags = dst_key_flags(prevkey);
 650
 651		dst_key_format(prevkey, keystr, sizeof(keystr));
 652		dst_key_getprivateformat(prevkey, &major, &minor);
 653		if (major != DST_MAJOR_VERSION || minor < DST_MINOR_VERSION)
 654			fatal("Key %s has incompatible format version %d.%d\n\t"
 655			      "It is not possible to generate a successor key.",
 656			      keystr, major, minor);
 657
 658		ret = dst_key_gettime(prevkey, DST_TIME_ACTIVATE, &when);
 659		if (ret != ISC_R_SUCCESS)
 660			fatal("Key %s has no activation date.\n\t"
 661			      "You must use dnssec-settime -A to set one "
 662			      "before generating a successor.", keystr);
 663
 664		ret = dst_key_gettime(prevkey, DST_TIME_INACTIVE, &activate);
 665		if (ret != ISC_R_SUCCESS)
 666			fatal("Key %s has no inactivation date.\n\t"
 667			      "You must use dnssec-settime -I to set one "
 668			      "before generating a successor.", keystr);
 669
 670		publish = activate - prepub;
 671		if (publish < now)
 672			fatal("Key %s becomes inactive\n\t"
 673			      "sooner than the prepublication period "
 674			      "for the new key ends.\n\t"
 675			      "Either change the inactivation date with "
 676			      "dnssec-settime -I,\n\t"
 677			      "or use the -i option to set a shorter "
 678			      "prepublication interval.", keystr);
 679
 680		ret = dst_key_gettime(prevkey, DST_TIME_DELETE, &when);
 681		if (ret != ISC_R_SUCCESS)
 682			fprintf(stderr, "%s: WARNING: Key %s has no removal "
 683					"date;\n\t it will remain in the zone "
 684					"indefinitely after rollover.\n\t "
 685					"You can use dnssec-settime -D to "
 686					"change this.\n", program, keystr);
 687
 688		setpub = setact = ISC_TRUE;
 689	}
 690
 691	switch (alg) {
 692	case DNS_KEYALG_RSAMD5:
 693	case DNS_KEYALG_RSASHA1:
 694	case DNS_KEYALG_NSEC3RSASHA1:
 695	case DNS_KEYALG_RSASHA256:
 696		if (size != 0 && (size < 512 || size > MAX_RSA))
 697			fatal("RSA key size %d out of range", size);
 698		break;
 699	case DNS_KEYALG_RSASHA512:
 700		if (size != 0 && (size < 1024 || size > MAX_RSA))
 701			fatal("RSA key size %d out of range", size);
 702		break;
 703	case DNS_KEYALG_DH:
 704		if (size != 0 && (size < 128 || size > 4096))
 705			fatal("DH key size %d out of range", size);
 706		break;
 707	case DNS_KEYALG_DSA:
 708	case DNS_KEYALG_NSEC3DSA:
 709		if (size != 0 && !dsa_size_ok(size))
 710			fatal("invalid DSS key size: %d", size);
 711		break;
 712	case DST_ALG_ECCGOST:
 713		break;
 714	case DST_ALG_HMACMD5:
 715		options |= DST_TYPE_KEY;
 716		if (size < 1 || size > 512)
 717			fatal("HMAC-MD5 key size %d out of range", size);
 718		if (dbits != 0 && (dbits < 80 || dbits > 128))
 719			fatal("HMAC-MD5 digest bits %d out of range", dbits);
 720		if ((dbits % 8) != 0)
 721			fatal("HMAC-MD5 digest bits %d not divisible by 8",
 722			      dbits);
 723		break;
 724	case DST_ALG_HMACSHA1:
 725		options |= DST_TYPE_KEY;
 726		if (size < 1 || size > 160)
 727			fatal("HMAC-SHA1 key size %d out of range", size);
 728		if (dbits != 0 && (dbits < 80 || dbits > 160))
 729			fatal("HMAC-SHA1 digest bits %d out of range", dbits);
 730		if ((dbits % 8) != 0)
 731			fatal("HMAC-SHA1 digest bits %d not divisible by 8",
 732			      dbits);
 733		break;
 734	case DST_ALG_HMACSHA224:
 735		options |= DST_TYPE_KEY;
 736		if (size < 1 || size > 224)
 737			fatal("HMAC-SHA224 key size %d out of range", size);
 738		if (dbits != 0 && (dbits < 112 || dbits > 224))
 739			fatal("HMAC-SHA224 digest bits %d out of range", dbits);
 740		if ((dbits % 8) != 0)
 741			fatal("HMAC-SHA224 digest bits %d not divisible by 8",
 742			      dbits);
 743		break;
 744	case DST_ALG_HMACSHA256:
 745		options |= DST_TYPE_KEY;
 746		if (size < 1 || size > 256)
 747			fatal("HMAC-SHA256 key size %d out of range", size);
 748		if (dbits != 0 && (dbits < 128 || dbits > 256))
 749			fatal("HMAC-SHA256 digest bits %d out of range", dbits);
 750		if ((dbits % 8) != 0)
 751			fatal("HMAC-SHA256 digest bits %d not divisible by 8",
 752			      dbits);
 753		break;
 754	case DST_ALG_HMACSHA384:
 755		options |= DST_TYPE_KEY;
 756		if (size < 1 || size > 384)
 757			fatal("HMAC-384 key size %d out of range", size);
 758		if (dbits != 0 && (dbits < 192 || dbits > 384))
 759			fatal("HMAC-SHA384 digest bits %d out of range", dbits);
 760		if ((dbits % 8) != 0)
 761			fatal("HMAC-SHA384 digest bits %d not divisible by 8",
 762			      dbits);
 763		break;
 764	case DST_ALG_HMACSHA512:
 765		options |= DST_TYPE_KEY;
 766		if (size < 1 || size > 512)
 767			fatal("HMAC-SHA512 key size %d out of range", size);
 768		if (dbits != 0 && (dbits < 256 || dbits > 512))
 769			fatal("HMAC-SHA512 digest bits %d out of range", dbits);
 770		if ((dbits % 8) != 0)
 771			fatal("HMAC-SHA512 digest bits %d not divisible by 8",
 772			      dbits);
 773		break;
 774	}
 775
 776	if (!(alg == DNS_KEYALG_RSAMD5 || alg == DNS_KEYALG_RSASHA1 ||
 777	      alg == DNS_KEYALG_NSEC3RSASHA1 || alg == DNS_KEYALG_RSASHA256 ||
 778	      alg == DNS_KEYALG_RSASHA512 || alg == DST_ALG_ECCGOST) &&
 779	    rsa_exp != 0)
 780		fatal("specified RSA exponent for a non-RSA key");
 781
 782	if (alg != DNS_KEYALG_DH && generator != 0)
 783		fatal("specified DH generator for a non-DH key");
 784
 785	if (nametype == NULL) {
 786		if ((options & DST_TYPE_KEY) != 0) /* KEY / HMAC */
 787			fatal("no nametype specified");
 788		flags |= DNS_KEYOWNER_ZONE;	/* DNSKEY */
 789	} else if (strcasecmp(nametype, "zone") == 0)
 790		flags |= DNS_KEYOWNER_ZONE;
 791	else if ((options & DST_TYPE_KEY) != 0)	{ /* KEY / HMAC */
 792		if (strcasecmp(nametype, "host") == 0 ||
 793			 strcasecmp(nametype, "entity") == 0)
 794			flags |= DNS_KEYOWNER_ENTITY;
 795		else if (strcasecmp(nametype, "user") == 0)
 796			flags |= DNS_KEYOWNER_USER;
 797		else
 798			fatal("invalid KEY nametype %s", nametype);
 799	} else if (strcasecmp(nametype, "other") != 0) /* DNSKEY */
 800		fatal("invalid DNSKEY nametype %s", nametype);
 801
 802	rdclass = strtoclass(classname);
 803
 804	if (directory == NULL)
 805		directory = ".";
 806
 807	if ((options & DST_TYPE_KEY) != 0)  /* KEY / HMAC */
 808		flags |= signatory;
 809	else if ((flags & DNS_KEYOWNER_ZONE) != 0) { /* DNSKEY */
 810		flags |= kskflag;
 811		flags |= revflag;
 812	}
 813
 814	if (protocol == -1)
 815		protocol = DNS_KEYPROTO_DNSSEC;
 816	else if ((options & DST_TYPE_KEY) == 0 &&
 817		 protocol != DNS_KEYPROTO_DNSSEC)
 818		fatal("invalid DNSKEY protocol: %d", protocol);
 819
 820	if ((flags & DNS_KEYFLAG_TYPEMASK) == DNS_KEYTYPE_NOKEY) {
 821		if (size > 0)
 822			fatal("specified null key with non-zero size");
 823		if ((flags & DNS_KEYFLAG_SIGNATORYMASK) != 0)
 824			fatal("specified null key with signing authority");
 825	}
 826
 827	if ((flags & DNS_KEYFLAG_OWNERMASK) == DNS_KEYOWNER_ZONE &&
 828	    (alg == DNS_KEYALG_DH || alg == DST_ALG_HMACMD5 ||
 829	     alg == DST_ALG_HMACSHA1 || alg == DST_ALG_HMACSHA224 ||
 830	     alg == DST_ALG_HMACSHA256 || alg == DST_ALG_HMACSHA384 ||
 831	     alg == DST_ALG_HMACSHA512))
 832		fatal("a key with algorithm '%s' cannot be a zone key",
 833		      algname);
 834
 835	switch(alg) {
 836	case DNS_KEYALG_RSAMD5:
 837	case DNS_KEYALG_RSASHA1:
 838	case DNS_KEYALG_NSEC3RSASHA1:
 839	case DNS_KEYALG_RSASHA256:
 840	case DNS_KEYALG_RSASHA512:
 841		param = rsa_exp;
 842		show_progress = ISC_TRUE;
 843		break;
 844
 845	case DNS_KEYALG_DH:
 846		param = generator;
 847		break;
 848
 849	case DNS_KEYALG_DSA:
 850	case DNS_KEYALG_NSEC3DSA:
 851	case DST_ALG_ECCGOST:
 852		show_progress = ISC_TRUE;
 853		/* fall through */
 854
 855	case DST_ALG_HMACMD5:
 856	case DST_ALG_HMACSHA1:
 857	case DST_ALG_HMACSHA224:
 858	case DST_ALG_HMACSHA256:
 859	case DST_ALG_HMACSHA384:
 860	case DST_ALG_HMACSHA512:
 861		param = 0;
 862		break;
 863	}
 864
 865	if ((flags & DNS_KEYFLAG_TYPEMASK) == DNS_KEYTYPE_NOKEY)
 866		null_key = ISC_TRUE;
 867
 868	isc_buffer_init(&buf, filename, sizeof(filename) - 1);
 869
 870	do {
 871		conflict = ISC_FALSE;
 872
 873		if (!quiet && show_progress) {
 874			fprintf(stderr, "Generating key pair.");
 875			ret = dst_key_generate2(name, alg, size, param, flags,
 876						protocol, rdclass, mctx, &key,
 877						&progress);
 878			putc('\n', stderr);
 879			fflush(stderr);
 880		} else {
 881			ret = dst_key_generate2(name, alg, size, param, flags,
 882						protocol, rdclass, mctx, &key,
 883						NULL);
 884		}
 885
 886		isc_entropy_stopcallbacksources(ectx);
 887
 888		if (ret != ISC_R_SUCCESS) {
 889			char namestr[DNS_NAME_FORMATSIZE];
 890			char algstr[DNS_SECALG_FORMATSIZE];
 891			dns_name_format(name, namestr, sizeof(namestr));
 892			dns_secalg_format(alg, algstr, sizeof(algstr));
 893			fatal("failed to generate key %s/%s: %s\n",
 894			      namestr, algstr, isc_result_totext(ret));
 895			/* NOTREACHED */
 896			exit(-1);
 897		}
 898
 899		dst_key_setbits(key, dbits);
 900
 901		/*
 902		 * Set key timing metadata (unless using -C)
 903		 *
 904		 * Creation date is always set to "now".
 905		 *
 906		 * For a new key without an explicit predecessor, publish
 907		 * and activation dates are set to "now" by default, but
 908		 * can both be overridden.
 909		 *
 910		 * For a successor key, activation is set to match the
 911		 * predecessor's inactivation date.  Publish is set to 30
 912		 * days earlier than that (XXX: this should be configurable).
 913		 * If either of the resulting dates are in the past, that's
 914		 * an error; the inactivation date of the predecessor key
 915		 * must be updated before a successor key can be created.
 916		 */
 917		if (!oldstyle) {
 918			dst_key_settime(key, DST_TIME_CREATED, now);
 919
 920			if (genonly && (setpub || setact))
 921				fatal("cannot use -G together with "
 922				      "-P or -A options");
 923
 924			if (setpub)
 925				dst_key_settime(key, DST_TIME_PUBLISH, publish);
 926			else if (setact)
 927				dst_key_settime(key, DST_TIME_PUBLISH,
 928						activate);
 929			else if (!genonly && !unsetpub)
 930				dst_key_settime(key, DST_TIME_PUBLISH, now);
 931
 932			if (setact)
 933				dst_key_settime(key, DST_TIME_ACTIVATE,
 934						activate);
 935			else if (!genonly && !unsetact)
 936				dst_key_settime(key, DST_TIME_ACTIVATE, now);
 937
 938			if (setrev) {
 939				if (kskflag == 0)
 940					fprintf(stderr, "%s: warning: Key is "
 941						"not flagged as a KSK, but -R "
 942						"was used. Revoking a ZSK is "
 943						"legal, but undefined.\n",
 944						program);
 945				dst_key_settime(key, DST_TIME_REVOKE, revoke);
 946			}
 947
 948			if (setinact)
 949				dst_key_settime(key, DST_TIME_INACTIVE,
 950						inactive);
 951
 952			if (setdel)
 953				dst_key_settime(key, DST_TIME_DELETE, delete);
 954		} else {
 955			if (setpub || setact || setrev || setinact ||
 956			    setdel || unsetpub || unsetact ||
 957			    unsetrev || unsetinact || unsetdel || genonly)
 958				fatal("cannot use -C together with "
 959				      "-P, -A, -R, -I, -D, or -G options");
 960			/*
 961			 * Compatibility mode: Private-key-format
 962			 * should be set to 1.2.
 963			 */
 964			dst_key_setprivateformat(key, 1, 2);
 965		}
 966
 967		/*
 968		 * Do not overwrite an existing key, or create a key
 969		 * if there is a risk of ID collision due to this key
 970		 * or another key being revoked.
 971		 */
 972		if (key_collision(key, name, directory, mctx, NULL)) {
 973			conflict = ISC_TRUE;
 974			if (null_key) {
 975				dst_key_free(&key);
 976				break;
 977			}
 978
 979			if (verbose > 0) {
 980				isc_buffer_clear(&buf);
 981				ret = dst_key_buildfilename(key, 0,
 982							    directory, &buf);
 983				if (ret == ISC_R_SUCCESS)
 984					fprintf(stderr,
 985						"%s: %s already exists, or "
 986						"might collide with another "
 987						"key upon revokation.  "
 988						"Generating a new key\n",
 989						program, filename);
 990			}
 991
 992			dst_key_free(&key);
 993		}
 994	} while (conflict == ISC_TRUE);
 995
 996	if (conflict)
 997		fatal("cannot generate a null key due to possible key ID "
 998		      "collision");
 999
1000	ret = dst_key_tofile(key, options, directory);
1001	if (ret != ISC_R_SUCCESS) {
1002		char keystr[DST_KEY_FORMATSIZE];
1003		dst_key_format(key, keystr, sizeof(keystr));
1004		fatal("failed to write key %s: %s\n", keystr,
1005		      isc_result_totext(ret));
1006	}
1007
1008	isc_buffer_clear(&buf);
1009	ret = dst_key_buildfilename(key, 0, NULL, &buf);
1010	if (ret != ISC_R_SUCCESS)
1011		fatal("dst_key_buildfilename returned: %s\n",
1012		      isc_result_totext(ret));
1013	printf("%s\n", filename);
1014	dst_key_free(&key);
1015	if (prevkey != NULL)
1016		dst_key_free(&prevkey);
1017
1018	cleanup_logging(&log);
1019	cleanup_entropy(&ectx);
1020	dst_lib_destroy();
1021	dns_name_destroy();
1022	if (verbose > 10)
1023		isc_mem_stats(mctx, stdout);
1024	isc_mem_destroy(&mctx);
1025
1026	if (freeit != NULL)
1027		free(freeit);
1028
1029	return (0);
1030}