Adding upstream version 1:9.11.5.P4+dfsg.upstream/1%9.11.5.P4+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1934 insertions, 0 deletions

diff --git a/bin/dnssec/dnssectool.c b/bin/dnssec/dnssectool.c
new file mode 100644
index 0000000..fbc7ece
--- /dev/null
+++ b/bin/dnssec/dnssectool.c
@@ -0,0 +1,1934 @@
+/*
+ * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * See the COPYRIGHT file distributed with this work for additional
+ * information regarding copyright ownership.
+ */
+
+/*! \file */
+
+/*%
+ * DNSSEC Support Routines.
+ */
+
+#include <config.h>
+
+#include <inttypes.h>
+#include <stdbool.h>
+#include <stdlib.h>
+
+#ifdef _WIN32
+#include <Winsock2.h>
+#endif
+
+#include <isc/base32.h>
+#include <isc/buffer.h>
+#include <isc/commandline.h>
+#include <isc/dir.h>
+#include <isc/entropy.h>
+#include <isc/file.h>
+#include <isc/heap.h>
+#include <isc/list.h>
+#include <isc/mem.h>
+#include <isc/print.h>
+#include <isc/string.h>
+#include <isc/time.h>
+#include <isc/util.h>
+
+#include <dns/db.h>
+#include <dns/dbiterator.h>
+#include <dns/dnssec.h>
+#include <dns/fixedname.h>
+#include <dns/keyvalues.h>
+#include <dns/log.h>
+#include <dns/name.h>
+#include <dns/nsec.h>
+#include <dns/nsec3.h>
+#include <dns/rdatastruct.h>
+#include <dns/rdataclass.h>
+#include <dns/rdataset.h>
+#include <dns/rdatasetiter.h>
+#include <dns/rdatatype.h>
+#include <dns/result.h>
+#include <dns/secalg.h>
+#include <dns/time.h>
+
+#include "dnssectool.h"
+
+static isc_heap_t *expected_chains, *found_chains;
+
+struct nsec3_chain_fixed {
+	uint8_t	hash;
+	uint8_t	salt_length;
+	uint8_t	next_length;
+	uint16_t	iterations;
+	/* unsigned char salt[0]; */
+	/* unsigned char owner[0]; */
+	/* unsigned char next[0]; */
+};
+
+extern int verbose;
+extern const char *program;
+
+typedef struct entropysource entropysource_t;
+
+struct entropysource {
+	isc_entropysource_t *source;
+	isc_mem_t *mctx;
+	ISC_LINK(entropysource_t) link;
+};
+
+static ISC_LIST(entropysource_t) sources;
+static fatalcallback_t *fatalcallback = NULL;
+
+void
+fatal(const char *format, ...) {
+	va_list args;
+
+	fprintf(stderr, "%s: fatal: ", program);
+	va_start(args, format);
+	vfprintf(stderr, format, args);
+	va_end(args);
+	fprintf(stderr, "\n");
+	if (fatalcallback != NULL)
+		(*fatalcallback)();
+	exit(1);
+}
+
+void
+setfatalcallback(fatalcallback_t *callback) {
+	fatalcallback = callback;
+}
+
+void
+check_result(isc_result_t result, const char *message) {
+	if (result != ISC_R_SUCCESS)
+		fatal("%s: %s", message, isc_result_totext(result));
+}
+
+void
+vbprintf(int level, const char *fmt, ...) {
+	va_list ap;
+	if (level > verbose)
+		return;
+	va_start(ap, fmt);
+	fprintf(stderr, "%s: ", program);
+	vfprintf(stderr, fmt, ap);
+	va_end(ap);
+}
+
+void
+version(const char *name) {
+	fprintf(stderr, "%s %s\n", name, VERSION);
+	exit(0);
+}
+
+void
+type_format(const dns_rdatatype_t type, char *cp, unsigned int size) {
+	isc_buffer_t b;
+	isc_region_t r;
+	isc_result_t result;
+
+	isc_buffer_init(&b, cp, size - 1);
+	result = dns_rdatatype_totext(type, &b);
+	check_result(result, "dns_rdatatype_totext()");
+	isc_buffer_usedregion(&b, &r);
+	r.base[r.length] = 0;
+}
+
+void
+sig_format(dns_rdata_rrsig_t *sig, char *cp, unsigned int size) {
+	char namestr[DNS_NAME_FORMATSIZE];
+	char algstr[DNS_NAME_FORMATSIZE];
+
+	dns_name_format(&sig->signer, namestr, sizeof(namestr));
+	dns_secalg_format(sig->algorithm, algstr, sizeof(algstr));
+	snprintf(cp, size, "%s/%s/%d", namestr, algstr, sig->keyid);
+}
+
+void
+setup_logging(isc_mem_t *mctx, isc_log_t **logp) {
+	isc_result_t result;
+	isc_logdestination_t destination;
+	isc_logconfig_t *logconfig = NULL;
+	isc_log_t *log = NULL;
+	int level;
+
+	if (verbose < 0)
+		verbose = 0;
+	switch (verbose) {
+	case 0:
+		/*
+		 * We want to see warnings about things like out-of-zone
+		 * data in the master file even when not verbose.
+		 */
+		level = ISC_LOG_WARNING;
+		break;
+	case 1:
+		level = ISC_LOG_INFO;
+		break;
+	default:
+		level = ISC_LOG_DEBUG(verbose - 2 + 1);
+		break;
+	}
+
+	RUNTIME_CHECK(isc_log_create(mctx, &log, &logconfig) == ISC_R_SUCCESS);
+	isc_log_setcontext(log);
+	dns_log_init(log);
+	dns_log_setcontext(log);
+
+	RUNTIME_CHECK(isc_log_settag(logconfig, program) == ISC_R_SUCCESS);
+
+	/*
+	 * Set up a channel similar to default_stderr except:
+	 *  - the logging level is passed in
+	 *  - the program name and logging level are printed
+	 *  - no time stamp is printed
+	 */
+	destination.file.stream = stderr;
+	destination.file.name = NULL;
+	destination.file.versions = ISC_LOG_ROLLNEVER;
+	destination.file.maximum_size = 0;
+	result = isc_log_createchannel(logconfig, "stderr",
+				       ISC_LOG_TOFILEDESC,
+				       level,
+				       &destination,
+				       ISC_LOG_PRINTTAG|ISC_LOG_PRINTLEVEL);
+	check_result(result, "isc_log_createchannel()");
+
+	RUNTIME_CHECK(isc_log_usechannel(logconfig, "stderr",
+					 NULL, NULL) == ISC_R_SUCCESS);
+
+	*logp = log;
+}
+
+void
+cleanup_logging(isc_log_t **logp) {
+	isc_log_t *log;
+
+	REQUIRE(logp != NULL);
+
+	log = *logp;
+	*logp = NULL;
+
+	if (log == NULL)
+		return;
+
+	isc_log_destroy(&log);
+	isc_log_setcontext(NULL);
+	dns_log_setcontext(NULL);
+}
+
+void
+setup_entropy(isc_mem_t *mctx, const char *randomfile, isc_entropy_t **ectx) {
+	isc_result_t result;
+	isc_entropysource_t *source = NULL;
+	entropysource_t *elt;
+	int usekeyboard = ISC_ENTROPY_KEYBOARDMAYBE;
+
+	REQUIRE(ectx != NULL);
+
+	if (*ectx == NULL) {
+		result = isc_entropy_create(mctx, ectx);
+		if (result != ISC_R_SUCCESS)
+			fatal("could not create entropy object");
+		ISC_LIST_INIT(sources);
+	}
+
+	if (randomfile != NULL && strcmp(randomfile, "keyboard") == 0) {
+		usekeyboard = ISC_ENTROPY_KEYBOARDYES;
+		randomfile = NULL;
+	}
+
+	result = isc_entropy_usebestsource(*ectx, &source, randomfile,
+					   usekeyboard);
+
+	if (result != ISC_R_SUCCESS)
+		fatal("could not initialize entropy source: %s",
+		      isc_result_totext(result));
+
+	if (source != NULL) {
+		elt = isc_mem_get(mctx, sizeof(*elt));
+		if (elt == NULL)
+			fatal("out of memory");
+		elt->source = source;
+		elt->mctx = mctx;
+		ISC_LINK_INIT(elt, link);
+		ISC_LIST_APPEND(sources, elt, link);
+	}
+}
+
+void
+cleanup_entropy(isc_entropy_t **ectx) {
+	entropysource_t *source;
+	while (!ISC_LIST_EMPTY(sources)) {
+		source = ISC_LIST_HEAD(sources);
+		ISC_LIST_UNLINK(sources, source, link);
+		isc_entropy_destroysource(&source->source);
+		isc_mem_put(source->mctx, source, sizeof(*source));
+	}
+	isc_entropy_detach(ectx);
+}
+
+static isc_stdtime_t
+time_units(isc_stdtime_t offset, char *suffix, const char *str) {
+	switch (suffix[0]) {
+	    case 'Y': case 'y':
+		return (offset * (365 * 24 * 3600));
+	    case 'M': case 'm':
+		switch (suffix[1]) {
+		    case 'O': case 'o':
+			return (offset * (30 * 24 * 3600));
+		    case 'I': case 'i':
+			return (offset * 60);
+		    case '\0':
+			fatal("'%s' ambiguous: use 'mi' for minutes "
+			      "or 'mo' for months", str);
+		    default:
+			fatal("time value %s is invalid", str);
+		}
+		/* NOTREACHED */
+		break;
+	    case 'W': case 'w':
+		return (offset * (7 * 24 * 3600));
+	    case 'D': case 'd':
+		return (offset * (24 * 3600));
+	    case 'H': case 'h':
+		return (offset * 3600);
+	    case 'S': case 's': case '\0':
+		return (offset);
+	    default:
+		fatal("time value %s is invalid", str);
+	}
+	/* NOTREACHED */
+	return(0); /* silence compiler warning */
+}
+
+static inline bool
+isnone(const char *str) {
+	return ((strcasecmp(str, "none") == 0) ||
+		(strcasecmp(str, "never") == 0));
+}
+
+dns_ttl_t
+strtottl(const char *str) {
+	const char *orig = str;
+	dns_ttl_t ttl;
+	char *endp;
+
+	if (isnone(str))
+		return ((dns_ttl_t) 0);
+
+	ttl = strtol(str, &endp, 0);
+	if (ttl == 0 && endp == str)
+		fatal("TTL must be numeric");
+	ttl = time_units(ttl, endp, orig);
+	return (ttl);
+}
+
+isc_stdtime_t
+strtotime(const char *str, int64_t now, int64_t base,
+	  bool *setp)
+{
+	int64_t val, offset;
+	isc_result_t result;
+	const char *orig = str;
+	char *endp;
+	size_t n;
+
+	if (isnone(str)) {
+		if (setp != NULL)
+			*setp = false;
+		return ((isc_stdtime_t) 0);
+	}
+
+	if (setp != NULL)
+		*setp = true;
+
+	if ((str[0] == '0' || str[0] == '-') && str[1] == '\0')
+		return ((isc_stdtime_t) 0);
+
+	/*
+	 * We accept times in the following formats:
+	 *   now([+-]offset)
+	 *   YYYYMMDD([+-]offset)
+	 *   YYYYMMDDhhmmss([+-]offset)
+	 *   [+-]offset
+	 */
+	n = strspn(str, "0123456789");
+	if ((n == 8u || n == 14u) &&
+	    (str[n] == '\0' || str[n] == '-' || str[n] == '+'))
+	{
+		char timestr[15];
+
+		strlcpy(timestr, str, sizeof(timestr));
+		timestr[n] = 0;
+		if (n == 8u)
+			strlcat(timestr, "000000", sizeof(timestr));
+		result = dns_time64_fromtext(timestr, &val);
+		if (result != ISC_R_SUCCESS)
+			fatal("time value %s is invalid: %s", orig,
+			      isc_result_totext(result));
+		base = val;
+		str += n;
+	} else if (strncmp(str, "now", 3) == 0) {
+		base = now;
+		str += 3;
+	}
+
+	if (str[0] == '\0')
+		return ((isc_stdtime_t) base);
+	else if (str[0] == '+') {
+		offset = strtol(str + 1, &endp, 0);
+		offset = time_units((isc_stdtime_t) offset, endp, orig);
+		val = base + offset;
+	} else if (str[0] == '-') {
+		offset = strtol(str + 1, &endp, 0);
+		offset = time_units((isc_stdtime_t) offset, endp, orig);
+		val = base - offset;
+	} else
+		fatal("time value %s is invalid", orig);
+
+	return ((isc_stdtime_t) val);
+}
+
+dns_rdataclass_t
+strtoclass(const char *str) {
+	isc_textregion_t r;
+	dns_rdataclass_t rdclass;
+	isc_result_t ret;
+
+	if (str == NULL)
+		return dns_rdataclass_in;
+	DE_CONST(str, r.base);
+	r.length = strlen(str);
+	ret = dns_rdataclass_fromtext(&rdclass, &r);
+	if (ret != ISC_R_SUCCESS)
+		fatal("unknown class %s", str);
+	return (rdclass);
+}
+
+isc_result_t
+try_dir(const char *dirname) {
+	isc_result_t result;
+	isc_dir_t d;
+
+	isc_dir_init(&d);
+	result = isc_dir_open(&d, dirname);
+	if (result == ISC_R_SUCCESS) {
+		isc_dir_close(&d);
+	}
+	return (result);
+}
+
+/*
+ * Check private key version compatibility.
+ */
+void
+check_keyversion(dst_key_t *key, char *keystr) {
+	int major, minor;
+	dst_key_getprivateformat(key, &major, &minor);
+	INSIST(major <= DST_MAJOR_VERSION); /* invalid private key */
+
+	if (major < DST_MAJOR_VERSION || minor < DST_MINOR_VERSION)
+		fatal("Key %s has incompatible format version %d.%d, "
+		      "use -f to force upgrade to new version.",
+		      keystr, major, minor);
+	if (minor > DST_MINOR_VERSION)
+		fatal("Key %s has incompatible format version %d.%d, "
+		      "use -f to force downgrade to current version.",
+		      keystr, major, minor);
+}
+
+void
+set_keyversion(dst_key_t *key) {
+	int major, minor;
+	dst_key_getprivateformat(key, &major, &minor);
+	INSIST(major <= DST_MAJOR_VERSION);
+
+	if (major != DST_MAJOR_VERSION || minor != DST_MINOR_VERSION)
+		dst_key_setprivateformat(key, DST_MAJOR_VERSION,
+					 DST_MINOR_VERSION);
+
+	/*
+	 * If the key is from a version older than 1.3, set
+	 * set the creation date
+	 */
+	if (major < 1 || (major == 1 && minor <= 2)) {
+		isc_stdtime_t now;
+		isc_stdtime_get(&now);
+		dst_key_settime(key, DST_TIME_CREATED, now);
+	}
+}
+
+bool
+key_collision(dst_key_t *dstkey, dns_name_t *name, const char *dir,
+	      isc_mem_t *mctx, bool *exact)
+{
+	isc_result_t result;
+	bool conflict = false;
+	dns_dnsseckeylist_t matchkeys;
+	dns_dnsseckey_t *key = NULL;
+	uint16_t id, oldid;
+	uint32_t rid, roldid;
+	dns_secalg_t alg;
+	char filename[ISC_DIR_NAMEMAX];
+	isc_buffer_t fileb;
+
+	if (exact != NULL)
+		*exact = false;
+
+	id = dst_key_id(dstkey);
+	rid = dst_key_rid(dstkey);
+	alg = dst_key_alg(dstkey);
+
+	/*
+	 * For HMAC and Diffie Hellman just check if there is a
+	 * direct collision as they can't be revoked.  Additionally
+	 * dns_dnssec_findmatchingkeys only handles DNSKEY which is
+	 * not used for HMAC.
+	 */
+	switch (alg) {
+	case DST_ALG_HMACMD5:
+	case DST_ALG_HMACSHA1:
+	case DST_ALG_HMACSHA224:
+	case DST_ALG_HMACSHA256:
+	case DST_ALG_HMACSHA384:
+	case DST_ALG_HMACSHA512:
+	case DST_ALG_DH:
+		isc_buffer_init(&fileb, filename, sizeof(filename));
+		result = dst_key_buildfilename(dstkey, DST_TYPE_PRIVATE,
+					       dir, &fileb);
+		if (result != ISC_R_SUCCESS)
+			return (true);
+		return (isc_file_exists(filename));
+	}
+
+	ISC_LIST_INIT(matchkeys);
+	result = dns_dnssec_findmatchingkeys(name, dir, mctx, &matchkeys);
+	if (result == ISC_R_NOTFOUND)
+		return (false);
+
+	while (!ISC_LIST_EMPTY(matchkeys) && !conflict) {
+		key = ISC_LIST_HEAD(matchkeys);
+		if (dst_key_alg(key->key) != alg)
+			goto next;
+
+		oldid = dst_key_id(key->key);
+		roldid = dst_key_rid(key->key);
+
+		if (oldid == rid || roldid == id || id == oldid) {
+			conflict = true;
+			if (id != oldid) {
+				if (verbose > 1)
+					fprintf(stderr, "Key ID %d could "
+						"collide with %d\n",
+						id, oldid);
+			} else {
+				if (exact != NULL)
+					*exact = true;
+				if (verbose > 1)
+					fprintf(stderr, "Key ID %d exists\n",
+						id);
+			}
+		}
+
+ next:
+		ISC_LIST_UNLINK(matchkeys, key, link);
+		dns_dnsseckey_destroy(mctx, &key);
+	}
+
+	/* Finish freeing the list */
+	while (!ISC_LIST_EMPTY(matchkeys)) {
+		key = ISC_LIST_HEAD(matchkeys);
+		ISC_LIST_UNLINK(matchkeys, key, link);
+		dns_dnsseckey_destroy(mctx, &key);
+	}
+
+	return (conflict);
+}
+
+bool
+is_delegation(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *origin,
+	      dns_name_t *name, dns_dbnode_t *node, uint32_t *ttlp)
+{
+	dns_rdataset_t nsset;
+	isc_result_t result;
+
+	if (dns_name_equal(name, origin))
+		return (false);
+
+	dns_rdataset_init(&nsset);
+	result = dns_db_findrdataset(db, node, ver, dns_rdatatype_ns,
+				     0, 0, &nsset, NULL);
+	if (dns_rdataset_isassociated(&nsset)) {
+		if (ttlp != NULL)
+			*ttlp = nsset.ttl;
+		dns_rdataset_disassociate(&nsset);
+	}
+
+	return (result == ISC_R_SUCCESS);
+}
+
+bool
+has_dname(dns_db_t *db, dns_dbversion_t *ver, dns_dbnode_t *node) {
+	dns_rdataset_t dnameset;
+	isc_result_t result;
+
+	dns_rdataset_init(&dnameset);
+	result = dns_db_findrdataset(db, node, ver, dns_rdatatype_dname, 0, 0,
+				     &dnameset, NULL);
+	if (dns_rdataset_isassociated(&dnameset)) {
+		dns_rdataset_disassociate(&dnameset);
+	}
+
+	return (result == ISC_R_SUCCESS);
+}
+
+static bool
+goodsig(dns_name_t *origin, dns_rdata_t *sigrdata, dns_name_t *name,
+	dns_rdataset_t *keyrdataset, dns_rdataset_t *rdataset, isc_mem_t *mctx)
+{
+	dns_rdata_dnskey_t key;
+	dns_rdata_rrsig_t sig;
+	dst_key_t *dstkey = NULL;
+	isc_result_t result;
+
+	result = dns_rdata_tostruct(sigrdata, &sig, NULL);
+	check_result(result, "dns_rdata_tostruct()");
+
+	for (result = dns_rdataset_first(keyrdataset);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdataset_next(keyrdataset)) {
+		dns_rdata_t rdata = DNS_RDATA_INIT;
+		dns_rdataset_current(keyrdataset, &rdata);
+		result = dns_rdata_tostruct(&rdata, &key, NULL);
+		check_result(result, "dns_rdata_tostruct()");
+		result = dns_dnssec_keyfromrdata(origin, &rdata, mctx,
+						 &dstkey);
+		if (result != ISC_R_SUCCESS)
+			return (false);
+		if (sig.algorithm != key.algorithm ||
+		    sig.keyid != dst_key_id(dstkey) ||
+		    !dns_name_equal(&sig.signer, origin)) {
+			dst_key_free(&dstkey);
+			continue;
+		}
+		result = dns_dnssec_verify(name, rdataset, dstkey, false,
+					   mctx, sigrdata);
+		dst_key_free(&dstkey);
+		if (result == ISC_R_SUCCESS)
+			return(true);
+	}
+	return (false);
+}
+
+static bool
+nsec_bitmap_equal(dns_rdata_nsec_t *nsec, dns_rdata_t *rdata) {
+	isc_result_t result;
+	dns_rdata_nsec_t tmpnsec;
+
+	result = dns_rdata_tostruct(rdata, &tmpnsec, NULL);
+	RUNTIME_CHECK(result == ISC_R_SUCCESS);
+
+	if (nsec->len != tmpnsec.len ||
+	    memcmp(nsec->typebits, tmpnsec.typebits, nsec->len) != 0) {
+		return (false);
+	}
+	return (true);
+}
+
+static isc_result_t
+verifynsec(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *name,
+	   dns_dbnode_t *node, dns_name_t *nextname)
+{
+	unsigned char buffer[DNS_NSEC_BUFFERSIZE];
+	char namebuf[DNS_NAME_FORMATSIZE];
+	char nextbuf[DNS_NAME_FORMATSIZE];
+	char found[DNS_NAME_FORMATSIZE];
+	dns_rdataset_t rdataset;
+	dns_rdata_t rdata = DNS_RDATA_INIT;
+	dns_rdata_t tmprdata = DNS_RDATA_INIT;
+	dns_rdata_nsec_t nsec;
+	isc_result_t result;
+
+	dns_rdataset_init(&rdataset);
+	result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec,
+				     0, 0, &rdataset, NULL);
+	if (result != ISC_R_SUCCESS) {
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		fprintf(stderr, "Missing NSEC record for %s\n", namebuf);
+		goto failure;
+	}
+
+	result = dns_rdataset_first(&rdataset);
+	check_result(result, "dns_rdataset_first()");
+
+	dns_rdataset_current(&rdataset, &rdata);
+	result = dns_rdata_tostruct(&rdata, &nsec, NULL);
+	check_result(result, "dns_rdata_tostruct()");
+	/* Check bit next name is consistent */
+	if (!dns_name_equal(&nsec.next, nextname)) {
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		dns_name_format(nextname, nextbuf, sizeof(nextbuf));
+		dns_name_format(&nsec.next, found, sizeof(found));
+		fprintf(stderr, "Bad NSEC record for %s, next name "
+				"mismatch (expected:%s, found:%s)\n", namebuf,
+				nextbuf, found);
+		goto failure;
+	}
+	/* Check bit map is consistent */
+	result = dns_nsec_buildrdata(db, ver, node, nextname, buffer,
+				     &tmprdata);
+	check_result(result, "dns_nsec_buildrdata()");
+	if (!nsec_bitmap_equal(&nsec, &tmprdata)) {
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		fprintf(stderr, "Bad NSEC record for %s, bit map "
+				"mismatch\n", namebuf);
+		goto failure;
+	}
+	result = dns_rdataset_next(&rdataset);
+	if (result != ISC_R_NOMORE) {
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		fprintf(stderr, "Multipe NSEC records for %s\n", namebuf);
+		goto failure;
+
+	}
+	dns_rdataset_disassociate(&rdataset);
+	return (ISC_R_SUCCESS);
+ failure:
+	if (dns_rdataset_isassociated(&rdataset))
+		dns_rdataset_disassociate(&rdataset);
+	return (ISC_R_FAILURE);
+}
+
+static void
+check_no_rrsig(dns_db_t *db, dns_dbversion_t *ver, dns_rdataset_t *rdataset,
+	       dns_name_t *name, dns_dbnode_t *node)
+{
+	char namebuf[DNS_NAME_FORMATSIZE];
+	char typebuf[80];
+	dns_rdataset_t sigrdataset;
+	dns_rdatasetiter_t *rdsiter = NULL;
+	isc_result_t result;
+
+	dns_rdataset_init(&sigrdataset);
+	result = dns_db_allrdatasets(db, node, ver, 0, &rdsiter);
+	check_result(result, "dns_db_allrdatasets()");
+	for (result = dns_rdatasetiter_first(rdsiter);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdatasetiter_next(rdsiter)) {
+		dns_rdatasetiter_current(rdsiter, &sigrdataset);
+		if (sigrdataset.type == dns_rdatatype_rrsig &&
+		    sigrdataset.covers == rdataset->type)
+			break;
+		dns_rdataset_disassociate(&sigrdataset);
+	}
+	if (result == ISC_R_SUCCESS) {
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		type_format(rdataset->type, typebuf, sizeof(typebuf));
+		fprintf(stderr, "Warning: Found unexpected signatures for "
+			"%s/%s\n", namebuf, typebuf);
+	}
+	if (dns_rdataset_isassociated(&sigrdataset))
+		dns_rdataset_disassociate(&sigrdataset);
+	dns_rdatasetiter_destroy(&rdsiter);
+}
+
+static bool
+chain_compare(void *arg1, void *arg2) {
+	struct nsec3_chain_fixed *e1 = arg1, *e2 = arg2;
+	size_t len;
+
+	/*
+	 * Do each element in turn to get a stable sort.
+	 */
+	if (e1->hash < e2->hash)
+		return (true);
+	if (e1->hash > e2->hash)
+		return (false);
+	if (e1->iterations < e2->iterations)
+		return (true);
+	if (e1->iterations > e2->iterations)
+		return (false);
+	if (e1->salt_length < e2->salt_length)
+		return (true);
+	if (e1->salt_length > e2->salt_length)
+		return (false);
+	if (e1->next_length < e2->next_length)
+		return (true);
+	if (e1->next_length > e2->next_length)
+		return (false);
+	len = e1->salt_length + 2 * e1->next_length;
+	if (memcmp(e1 + 1, e2 + 1, len) < 0)
+		return (true);
+	return (false);
+}
+
+static bool
+chain_equal(struct nsec3_chain_fixed *e1, struct nsec3_chain_fixed *e2) {
+	size_t len;
+
+	if (e1->hash != e2->hash)
+		return (false);
+	if (e1->iterations != e2->iterations)
+		return (false);
+	if (e1->salt_length != e2->salt_length)
+		return (false);
+	if (e1->next_length != e2->next_length)
+		return (false);
+	len = e1->salt_length + 2 * e1->next_length;
+	if (memcmp(e1 + 1, e2 + 1, len) != 0)
+		return (false);
+	return (true);
+}
+
+static isc_result_t
+record_nsec3(const unsigned char *rawhash, const dns_rdata_nsec3_t *nsec3,
+	     isc_mem_t *mctx, isc_heap_t *chains)
+{
+	struct nsec3_chain_fixed *element;
+	size_t len;
+	unsigned char *cp;
+	isc_result_t result;
+
+	len = sizeof(*element) + nsec3->next_length * 2 + nsec3->salt_length;
+
+	element = isc_mem_get(mctx, len);
+	if (element == NULL)
+		return (ISC_R_NOMEMORY);
+	memset(element, 0, len);
+	element->hash = nsec3->hash;
+	element->salt_length = nsec3->salt_length;
+	element->next_length = nsec3->next_length;
+	element->iterations = nsec3->iterations;
+	cp = (unsigned char *)(element + 1);
+	memmove(cp, nsec3->salt, nsec3->salt_length);
+	cp += nsec3->salt_length;
+	memmove(cp, rawhash, nsec3->next_length);
+	cp += nsec3->next_length;
+	memmove(cp, nsec3->next, nsec3->next_length);
+	result = isc_heap_insert(chains, element);
+	if (result != ISC_R_SUCCESS) {
+		fprintf(stderr, "isc_heap_insert failed: %s\n",
+			isc_result_totext(result));
+		isc_mem_put(mctx, element, len);
+	}
+	return (result);
+}
+
+static isc_result_t
+match_nsec3(dns_name_t *name, isc_mem_t *mctx,
+	    dns_rdata_nsec3param_t *nsec3param, dns_rdataset_t *rdataset,
+	    unsigned char types[8192], unsigned int maxtype,
+	    unsigned char *rawhash, size_t rhsize)
+{
+	unsigned char cbm[8244];
+	char namebuf[DNS_NAME_FORMATSIZE];
+	dns_rdata_nsec3_t nsec3;
+	isc_result_t result;
+	unsigned int len;
+
+	/*
+	 * Find matching NSEC3 record.
+	 */
+	for (result = dns_rdataset_first(rdataset);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdataset_next(rdataset)) {
+		dns_rdata_t rdata = DNS_RDATA_INIT;
+		dns_rdataset_current(rdataset, &rdata);
+		result = dns_rdata_tostruct(&rdata, &nsec3, NULL);
+		check_result(result, "dns_rdata_tostruct()");
+		if (nsec3.hash == nsec3param->hash &&
+		    nsec3.next_length == rhsize &&
+		    nsec3.iterations == nsec3param->iterations &&
+		    nsec3.salt_length == nsec3param->salt_length &&
+		    memcmp(nsec3.salt, nsec3param->salt,
+			   nsec3param->salt_length) == 0)
+			break;
+	}
+	if (result != ISC_R_SUCCESS) {
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		fprintf(stderr, "Missing NSEC3 record for %s\n", namebuf);
+		return (result);
+	}
+
+	/*
+	 * Check the type list.
+	 */
+	len = dns_nsec_compressbitmap(cbm, types, maxtype);
+	if (nsec3.len != len || memcmp(cbm, nsec3.typebits, len) != 0) {
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		fprintf(stderr, "Bad NSEC3 record for %s, bit map "
+				"mismatch\n", namebuf);
+		return (ISC_R_FAILURE);
+	}
+
+	/*
+	 * Record chain.
+	 */
+	result = record_nsec3(rawhash, &nsec3, mctx, expected_chains);
+	check_result(result, "record_nsec3()");
+
+	/*
+	 * Make sure there is only one NSEC3 record with this set of
+	 * parameters.
+	 */
+	for (result = dns_rdataset_next(rdataset);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdataset_next(rdataset)) {
+		dns_rdata_t rdata = DNS_RDATA_INIT;
+		dns_rdataset_current(rdataset, &rdata);
+		result = dns_rdata_tostruct(&rdata, &nsec3, NULL);
+		check_result(result, "dns_rdata_tostruct()");
+		if (nsec3.hash == nsec3param->hash &&
+		    nsec3.iterations == nsec3param->iterations &&
+		    nsec3.salt_length == nsec3param->salt_length &&
+		    memcmp(nsec3.salt, nsec3param->salt,
+			   nsec3.salt_length) == 0) {
+			dns_name_format(name, namebuf, sizeof(namebuf));
+			fprintf(stderr, "Multiple NSEC3 records with the "
+				"same parameter set for %s", namebuf);
+			result = DNS_R_DUPLICATE;
+			break;
+		}
+	}
+	if (result != ISC_R_NOMORE)
+		return (result);
+
+	result = ISC_R_SUCCESS;
+	return (result);
+}
+
+static bool
+innsec3params(dns_rdata_nsec3_t *nsec3, dns_rdataset_t *nsec3paramset) {
+	dns_rdata_nsec3param_t nsec3param;
+	isc_result_t result;
+
+	for (result = dns_rdataset_first(nsec3paramset);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdataset_next(nsec3paramset)) {
+		dns_rdata_t rdata = DNS_RDATA_INIT;
+
+		dns_rdataset_current(nsec3paramset, &rdata);
+		result = dns_rdata_tostruct(&rdata, &nsec3param, NULL);
+		check_result(result, "dns_rdata_tostruct()");
+		if (nsec3param.flags == 0 &&
+		    nsec3param.hash == nsec3->hash &&
+		    nsec3param.iterations == nsec3->iterations &&
+		    nsec3param.salt_length == nsec3->salt_length &&
+		    memcmp(nsec3param.salt, nsec3->salt,
+			   nsec3->salt_length) == 0)
+			return (true);
+	}
+	return (false);
+}
+
+static isc_result_t
+record_found(dns_db_t *db, dns_dbversion_t *ver, isc_mem_t *mctx,
+	     dns_name_t *name, dns_dbnode_t *node,
+	     dns_rdataset_t *nsec3paramset)
+{
+	unsigned char owner[NSEC3_MAX_HASH_LENGTH];
+	dns_rdata_nsec3_t nsec3;
+	dns_rdataset_t rdataset;
+	dns_label_t hashlabel;
+	isc_buffer_t b;
+	isc_result_t result;
+
+	if (nsec3paramset == NULL || !dns_rdataset_isassociated(nsec3paramset))
+		return (ISC_R_SUCCESS);
+
+	dns_rdataset_init(&rdataset);
+	result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3,
+				     0, 0, &rdataset, NULL);
+	if (result != ISC_R_SUCCESS)
+		return (ISC_R_SUCCESS);
+
+	dns_name_getlabel(name, 0, &hashlabel);
+	isc_region_consume(&hashlabel, 1);
+	isc_buffer_init(&b, owner, sizeof(owner));
+	result = isc_base32hex_decoderegion(&hashlabel, &b);
+	if (result != ISC_R_SUCCESS)
+		goto cleanup;
+
+	for (result = dns_rdataset_first(&rdataset);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdataset_next(&rdataset)) {
+		dns_rdata_t rdata = DNS_RDATA_INIT;
+		dns_rdataset_current(&rdataset, &rdata);
+		result = dns_rdata_tostruct(&rdata, &nsec3, NULL);
+		check_result(result, "dns_rdata_tostruct()");
+		if (nsec3.next_length != isc_buffer_usedlength(&b))
+			continue;
+		/*
+		 * We only care about NSEC3 records that match a NSEC3PARAM
+		 * record.
+		 */
+		if (!innsec3params(&nsec3, nsec3paramset))
+			continue;
+
+		/*
+		 * Record chain.
+		 */
+		result = record_nsec3(owner, &nsec3, mctx, found_chains);
+		check_result(result, "record_nsec3()");
+	}
+
+ cleanup:
+	dns_rdataset_disassociate(&rdataset);
+	return (ISC_R_SUCCESS);
+}
+
+static bool
+isoptout(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *origin,
+	 dns_rdata_t *nsec3rdata)
+{
+	dns_rdataset_t rdataset;
+	dns_rdata_t rdata = DNS_RDATA_INIT;
+	dns_rdata_nsec3_t nsec3;
+	dns_rdata_nsec3param_t nsec3param;
+	dns_fixedname_t fixed;
+	dns_name_t *hashname;
+	isc_result_t result;
+	dns_dbnode_t *node = NULL;
+	unsigned char rawhash[NSEC3_MAX_HASH_LENGTH];
+	size_t rhsize = sizeof(rawhash);
+	bool ret;
+
+	result = dns_rdata_tostruct(nsec3rdata, &nsec3param, NULL);
+	check_result(result, "dns_rdata_tostruct()");
+
+	dns_fixedname_init(&fixed);
+	result = dns_nsec3_hashname(&fixed, rawhash, &rhsize, origin, origin,
+				    nsec3param.hash, nsec3param.iterations,
+				    nsec3param.salt, nsec3param.salt_length);
+	check_result(result, "dns_nsec3_hashname()");
+
+	dns_rdataset_init(&rdataset);
+	hashname = dns_fixedname_name(&fixed);
+	result = dns_db_findnsec3node(db, hashname, false, &node);
+	if (result == ISC_R_SUCCESS)
+		result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3,
+					     0, 0, &rdataset, NULL);
+	if (result != ISC_R_SUCCESS)
+		return (false);
+
+	result = dns_rdataset_first(&rdataset);
+	check_result(result, "dns_rdataset_first()");
+
+	dns_rdataset_current(&rdataset, &rdata);
+
+	result = dns_rdata_tostruct(&rdata, &nsec3, NULL);
+	if (result != ISC_R_SUCCESS)
+		ret = false;
+	else
+		ret = (nsec3.flags & DNS_NSEC3FLAG_OPTOUT);
+
+	if (dns_rdataset_isassociated(&rdataset))
+		dns_rdataset_disassociate(&rdataset);
+	if (node != NULL)
+		dns_db_detachnode(db, &node);
+
+	return (ret);
+}
+
+static isc_result_t
+verifynsec3(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *origin,
+	    isc_mem_t *mctx, dns_name_t *name, dns_rdata_t *rdata,
+	    bool delegation, bool empty,
+	    unsigned char types[8192], unsigned int maxtype)
+{
+	char namebuf[DNS_NAME_FORMATSIZE];
+	char hashbuf[DNS_NAME_FORMATSIZE];
+	dns_rdataset_t rdataset;
+	dns_rdata_nsec3param_t nsec3param;
+	dns_fixedname_t fixed;
+	dns_name_t *hashname;
+	isc_result_t result;
+	dns_dbnode_t *node = NULL;
+	unsigned char rawhash[NSEC3_MAX_HASH_LENGTH];
+	size_t rhsize = sizeof(rawhash);
+	bool optout;
+
+	result = dns_rdata_tostruct(rdata, &nsec3param, NULL);
+	check_result(result, "dns_rdata_tostruct()");
+
+	if (nsec3param.flags != 0)
+		return (ISC_R_SUCCESS);
+
+	if (!dns_nsec3_supportedhash(nsec3param.hash))
+		return (ISC_R_SUCCESS);
+
+	optout = isoptout(db, ver, origin, rdata);
+
+	dns_fixedname_init(&fixed);
+	result = dns_nsec3_hashname(&fixed, rawhash, &rhsize, name, origin,
+				    nsec3param.hash, nsec3param.iterations,
+				    nsec3param.salt, nsec3param.salt_length);
+	check_result(result, "dns_nsec3_hashname()");
+
+	/*
+	 * We don't use dns_db_find() here as it works with the choosen
+	 * nsec3 chain and we may also be called with uncommitted data
+	 * from dnssec-signzone so the secure status of the zone may not
+	 * be up to date.
+	 */
+	dns_rdataset_init(&rdataset);
+	hashname = dns_fixedname_name(&fixed);
+	result = dns_db_findnsec3node(db, hashname, false, &node);
+	if (result == ISC_R_SUCCESS)
+		result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3,
+					     0, 0, &rdataset, NULL);
+	if (result != ISC_R_SUCCESS &&
+	    (!delegation || (empty && !optout) ||
+	     (!empty && dns_nsec_isset(types, dns_rdatatype_ds))))
+	{
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		dns_name_format(hashname, hashbuf, sizeof(hashbuf));
+		fprintf(stderr, "Missing NSEC3 record for %s (%s)\n",
+			namebuf, hashbuf);
+	} else if (result == ISC_R_NOTFOUND &&
+		   delegation && (!empty || optout))
+	{
+		result = ISC_R_SUCCESS;
+	} else if (result == ISC_R_SUCCESS) {
+		result = match_nsec3(name, mctx, &nsec3param, &rdataset,
+				     types, maxtype, rawhash, rhsize);
+	}
+
+	if (dns_rdataset_isassociated(&rdataset))
+		dns_rdataset_disassociate(&rdataset);
+	if (node != NULL)
+		dns_db_detachnode(db, &node);
+
+	return (result);
+}
+
+static isc_result_t
+verifynsec3s(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *origin,
+	     isc_mem_t *mctx, dns_name_t *name, dns_rdataset_t *nsec3paramset,
+	     bool delegation, bool empty,
+	     unsigned char types[8192], unsigned int maxtype)
+{
+	isc_result_t result;
+
+	for (result = dns_rdataset_first(nsec3paramset);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdataset_next(nsec3paramset)) {
+		dns_rdata_t rdata = DNS_RDATA_INIT;
+
+		dns_rdataset_current(nsec3paramset, &rdata);
+		result = verifynsec3(db, ver, origin, mctx, name, &rdata,
+				     delegation, empty, types, maxtype);
+		if (result != ISC_R_SUCCESS)
+			break;
+	}
+	if (result == ISC_R_NOMORE)
+		result = ISC_R_SUCCESS;
+	return (result);
+}
+
+static void
+verifyset(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *origin,
+	  isc_mem_t *mctx, dns_rdataset_t *rdataset, dns_name_t *name,
+	  dns_dbnode_t *node, dns_rdataset_t *keyrdataset,
+	  unsigned char *act_algorithms, unsigned char *bad_algorithms)
+{
+	unsigned char set_algorithms[256];
+	char namebuf[DNS_NAME_FORMATSIZE];
+	char algbuf[80];
+	char typebuf[80];
+	dns_rdataset_t sigrdataset;
+	dns_rdatasetiter_t *rdsiter = NULL;
+	isc_result_t result;
+	int i;
+
+	dns_rdataset_init(&sigrdataset);
+	result = dns_db_allrdatasets(db, node, ver, 0, &rdsiter);
+	check_result(result, "dns_db_allrdatasets()");
+	for (result = dns_rdatasetiter_first(rdsiter);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdatasetiter_next(rdsiter)) {
+		dns_rdatasetiter_current(rdsiter, &sigrdataset);
+		if (sigrdataset.type == dns_rdatatype_rrsig &&
+		    sigrdataset.covers == rdataset->type)
+			break;
+		dns_rdataset_disassociate(&sigrdataset);
+	}
+	if (result != ISC_R_SUCCESS) {
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		type_format(rdataset->type, typebuf, sizeof(typebuf));
+		fprintf(stderr, "No signatures for %s/%s\n", namebuf, typebuf);
+		for (i = 0; i < 256; i++)
+			if (act_algorithms[i] != 0)
+				bad_algorithms[i] = 1;
+		dns_rdatasetiter_destroy(&rdsiter);
+		return;
+	}
+
+	memset(set_algorithms, 0, sizeof(set_algorithms));
+	for (result = dns_rdataset_first(&sigrdataset);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdataset_next(&sigrdataset)) {
+		dns_rdata_t rdata = DNS_RDATA_INIT;
+		dns_rdata_rrsig_t sig;
+
+		dns_rdataset_current(&sigrdataset, &rdata);
+		result = dns_rdata_tostruct(&rdata, &sig, NULL);
+		check_result(result, "dns_rdata_tostruct()");
+		if (rdataset->ttl != sig.originalttl) {
+			dns_name_format(name, namebuf, sizeof(namebuf));
+			type_format(rdataset->type, typebuf, sizeof(typebuf));
+			fprintf(stderr, "TTL mismatch for %s %s keytag %u\n",
+				namebuf, typebuf, sig.keyid);
+			continue;
+		}
+		if ((set_algorithms[sig.algorithm] != 0) ||
+		    (act_algorithms[sig.algorithm] == 0))
+			continue;
+		if (goodsig(origin, &rdata, name, keyrdataset, rdataset, mctx))
+			set_algorithms[sig.algorithm] = 1;
+	}
+	dns_rdatasetiter_destroy(&rdsiter);
+	if (memcmp(set_algorithms, act_algorithms, sizeof(set_algorithms))) {
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		type_format(rdataset->type, typebuf, sizeof(typebuf));
+		for (i = 0; i < 256; i++)
+			if ((act_algorithms[i] != 0) &&
+			    (set_algorithms[i] == 0)) {
+				dns_secalg_format(i, algbuf, sizeof(algbuf));
+				fprintf(stderr, "No correct %s signature for "
+					"%s %s\n", algbuf, namebuf, typebuf);
+				bad_algorithms[i] = 1;
+			}
+	}
+	dns_rdataset_disassociate(&sigrdataset);
+}
+
+static isc_result_t
+verifynode(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *origin,
+	   isc_mem_t *mctx, dns_name_t *name, dns_dbnode_t *node,
+	   bool delegation, dns_rdataset_t *keyrdataset,
+	   unsigned char *act_algorithms, unsigned char *bad_algorithms,
+	   dns_rdataset_t *nsecset, dns_rdataset_t *nsec3paramset,
+	   dns_name_t *nextname)
+{
+	unsigned char types[8192];
+	unsigned int maxtype = 0;
+	dns_rdataset_t rdataset; dns_rdatasetiter_t *rdsiter = NULL;
+	isc_result_t result, tresult;
+
+	memset(types, 0, sizeof(types));
+	result = dns_db_allrdatasets(db, node, ver, 0, &rdsiter);
+	check_result(result, "dns_db_allrdatasets()");
+	result = dns_rdatasetiter_first(rdsiter);
+	dns_rdataset_init(&rdataset);
+	while (result == ISC_R_SUCCESS) {
+		dns_rdatasetiter_current(rdsiter, &rdataset);
+		/*
+		 * If we are not at a delegation then everything should be
+		 * signed.  If we are at a delegation then only the DS set
+		 * is signed.  The NS set is not signed at a delegation but
+		 * its existance is recorded in the bit map.  Anything else
+		 * other than NSEC and DS is not signed at a delegation.
+		 */
+		if (rdataset.type != dns_rdatatype_rrsig &&
+		    rdataset.type != dns_rdatatype_dnskey &&
+		    (!delegation || rdataset.type == dns_rdatatype_ds ||
+		     rdataset.type == dns_rdatatype_nsec)) {
+			verifyset(db, ver, origin, mctx, &rdataset,
+				  name, node, keyrdataset,
+				  act_algorithms, bad_algorithms);
+			dns_nsec_setbit(types, rdataset.type, 1);
+			if (rdataset.type > maxtype)
+				maxtype = rdataset.type;
+		} else if (rdataset.type != dns_rdatatype_rrsig &&
+			   rdataset.type != dns_rdatatype_dnskey) {
+			if (rdataset.type == dns_rdatatype_ns)
+				dns_nsec_setbit(types, rdataset.type, 1);
+			check_no_rrsig(db, ver, &rdataset, name, node);
+		} else
+			dns_nsec_setbit(types, rdataset.type, 1);
+		dns_rdataset_disassociate(&rdataset);
+		result = dns_rdatasetiter_next(rdsiter);
+	}
+	if (result != ISC_R_NOMORE)
+		fatal("rdataset iteration failed: %s",
+		      isc_result_totext(result));
+	dns_rdatasetiter_destroy(&rdsiter);
+
+	result = ISC_R_SUCCESS;
+
+	if (nsecset != NULL && dns_rdataset_isassociated(nsecset))
+		result = verifynsec(db, ver, name, node, nextname);
+
+	if (nsec3paramset != NULL && dns_rdataset_isassociated(nsec3paramset)) {
+		tresult = verifynsec3s(db, ver, origin, mctx, name,
+				       nsec3paramset, delegation, false,
+				       types, maxtype);
+		if (result == ISC_R_SUCCESS && tresult != ISC_R_SUCCESS)
+			result = tresult;
+	}
+	return (result);
+}
+
+static bool
+is_empty(dns_db_t *db, dns_dbversion_t *ver, dns_dbnode_t *node) {
+	dns_rdatasetiter_t *rdsiter = NULL;
+	isc_result_t result;
+
+	result = dns_db_allrdatasets(db, node, ver, 0, &rdsiter);
+	check_result(result, "dns_db_allrdatasets()");
+	result = dns_rdatasetiter_first(rdsiter);
+	dns_rdatasetiter_destroy(&rdsiter);
+	if (result == ISC_R_NOMORE)
+		return (true);
+	return (false);
+}
+
+static void
+check_no_nsec(dns_name_t *name, dns_dbnode_t *node, dns_db_t *db,
+	      dns_dbversion_t *ver)
+{
+	dns_rdataset_t rdataset;
+	isc_result_t result;
+
+	dns_rdataset_init(&rdataset);
+	result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec,
+				     0, 0, &rdataset, NULL);
+	if (result != ISC_R_NOTFOUND) {
+		char namebuf[DNS_NAME_FORMATSIZE];
+		dns_name_format(name, namebuf, sizeof(namebuf));
+		fatal("unexpected NSEC RRset at %s\n", namebuf);
+	}
+
+	if (dns_rdataset_isassociated(&rdataset))
+		dns_rdataset_disassociate(&rdataset);
+}
+
+static bool
+newchain(const struct nsec3_chain_fixed *first,
+	 const struct nsec3_chain_fixed *e)
+{
+	if (first->hash != e->hash ||
+	    first->iterations != e->iterations ||
+	    first->salt_length != e->salt_length ||
+	    first->next_length != e->next_length ||
+	    memcmp(first + 1, e + 1, first->salt_length) != 0)
+		return (true);
+	return (false);
+}
+
+static void
+free_element(isc_mem_t *mctx, struct nsec3_chain_fixed *e) {
+	size_t len;
+
+	len = sizeof(*e) + e->salt_length + 2 * e->next_length;
+	isc_mem_put(mctx, e, len);
+}
+
+static bool
+checknext(const struct nsec3_chain_fixed *first,
+	  const struct nsec3_chain_fixed *e)
+{
+	char buf[512];
+	const unsigned char *d1 = (const unsigned char *)(first + 1);
+	const unsigned char *d2 = (const unsigned char *)(e + 1);
+	isc_buffer_t b;
+	isc_region_t sr;
+
+	d1 += first->salt_length + first->next_length;
+	d2 += e->salt_length;
+
+	if (memcmp(d1, d2, first->next_length) == 0)
+		return (true);
+
+	DE_CONST(d1 - first->next_length, sr.base);
+	sr.length = first->next_length;
+	isc_buffer_init(&b, buf, sizeof(buf));
+	isc_base32hex_totext(&sr, 1, "", &b);
+	fprintf(stderr, "Break in NSEC3 chain at: %.*s\n",
+		(int) isc_buffer_usedlength(&b), buf);
+
+	DE_CONST(d1, sr.base);
+	sr.length = first->next_length;
+	isc_buffer_init(&b, buf, sizeof(buf));
+	isc_base32hex_totext(&sr, 1, "", &b);
+	fprintf(stderr, "Expected: %.*s\n", (int) isc_buffer_usedlength(&b),
+		buf);
+
+	DE_CONST(d2, sr.base);
+	sr.length = first->next_length;
+	isc_buffer_init(&b, buf, sizeof(buf));
+	isc_base32hex_totext(&sr, 1, "", &b);
+	fprintf(stderr, "Found: %.*s\n", (int) isc_buffer_usedlength(&b), buf);
+
+	return (false);
+}
+
+#define EXPECTEDANDFOUND "Expected and found NSEC3 chains not equal\n"
+
+static isc_result_t
+verify_nsec3_chains(isc_mem_t *mctx) {
+	isc_result_t result = ISC_R_SUCCESS;
+	struct nsec3_chain_fixed *e, *f = NULL;
+	struct nsec3_chain_fixed *first = NULL, *prev = NULL;
+
+	while ((e = isc_heap_element(expected_chains, 1)) != NULL) {
+		isc_heap_delete(expected_chains, 1);
+		if (f == NULL)
+			f = isc_heap_element(found_chains, 1);
+		if (f != NULL) {
+			isc_heap_delete(found_chains, 1);
+
+			/*
+			 * Check that they match.
+			 */
+			if (chain_equal(e, f)) {
+				free_element(mctx, f);
+				f = NULL;
+			} else {
+				if (result == ISC_R_SUCCESS)
+					fprintf(stderr, EXPECTEDANDFOUND);
+				result = ISC_R_FAILURE;
+				/*
+				 * Attempt to resync found_chain.
+				 */
+				while (f != NULL && !chain_compare(e, f)) {
+					free_element(mctx, f);
+					f = isc_heap_element(found_chains, 1);
+					if (f != NULL)
+						isc_heap_delete(found_chains, 1);
+					if (f != NULL && chain_equal(e, f)) {
+						free_element(mctx, f);
+						f = NULL;
+						break;
+					}
+				}
+			}
+		} else if (result == ISC_R_SUCCESS) {
+			fprintf(stderr, EXPECTEDANDFOUND);
+			result = ISC_R_FAILURE;
+		}
+		if (first == NULL || newchain(first, e)) {
+			if (prev != NULL) {
+				if (!checknext(prev, first))
+					result = ISC_R_FAILURE;
+				if (prev != first)
+					free_element(mctx, prev);
+			}
+			if (first != NULL)
+				free_element(mctx, first);
+			prev = first = e;
+			continue;
+		}
+		if (!checknext(prev, e))
+			result = ISC_R_FAILURE;
+		if (prev != first)
+			free_element(mctx, prev);
+		prev = e;
+	}
+	if (prev != NULL) {
+		if (!checknext(prev, first))
+			result = ISC_R_FAILURE;
+		if (prev != first)
+			free_element(mctx, prev);
+	}
+	if (first != NULL)
+		free_element(mctx, first);
+	do {
+		if (f != NULL) {
+			if (result == ISC_R_SUCCESS) {
+				fprintf(stderr, EXPECTEDANDFOUND);
+				result = ISC_R_FAILURE;
+			}
+			free_element(mctx, f);
+		}
+		f = isc_heap_element(found_chains, 1);
+		if (f != NULL)
+			isc_heap_delete(found_chains, 1);
+	} while (f != NULL);
+
+	return (result);
+}
+
+static isc_result_t
+verifyemptynodes(dns_db_t *db, dns_dbversion_t *ver, dns_name_t *origin,
+		 isc_mem_t *mctx, dns_name_t *name, dns_name_t *prevname,
+		 bool isdelegation, dns_rdataset_t *nsec3paramset)
+{
+	dns_namereln_t reln;
+	int order;
+	unsigned int labels, nlabels, i;
+	dns_name_t suffix;
+	isc_result_t result = ISC_R_SUCCESS, tresult;
+
+	reln = dns_name_fullcompare(prevname, name, &order, &labels);
+	if (order >= 0)
+		return (result);
+
+	nlabels = dns_name_countlabels(name);
+
+	if (reln == dns_namereln_commonancestor ||
+	    reln == dns_namereln_contains) {
+		dns_name_init(&suffix, NULL);
+		for (i = labels + 1; i < nlabels; i++) {
+			dns_name_getlabelsequence(name, nlabels - i, i,
+						  &suffix);
+			if (nsec3paramset != NULL &&
+			     dns_rdataset_isassociated(nsec3paramset)) {
+				tresult = verifynsec3s(db, ver, origin, mctx,
+						       &suffix, nsec3paramset,
+						       isdelegation, true,
+						       NULL, 0);
+				if (result == ISC_R_SUCCESS &&
+				    tresult != ISC_R_SUCCESS)
+					result = tresult;
+			}
+		}
+	}
+	return (result);
+}
+
+/*%
+ * Verify that certain things are sane:
+ *
+ *   The apex has a DNSKEY record with at least one KSK, and at least
+ *   one ZSK if the -x flag was not used.
+ *
+ *   The DNSKEY record was signed with at least one of the KSKs in this
+ *   set.
+ *
+ *   The rest of the zone was signed with at least one of the ZSKs
+ *   present in the DNSKEY RRSET.
+ */
+void
+verifyzone(dns_db_t *db, dns_dbversion_t *ver,
+	   dns_name_t *origin, isc_mem_t *mctx,
+	   bool ignore_kskflag, bool keyset_kskonly)
+{
+	char algbuf[80];
+	dns_dbiterator_t *dbiter = NULL;
+	dns_dbnode_t *node = NULL, *nextnode = NULL;
+	dns_fixedname_t fname, fnextname, fprevname, fzonecut;
+	dns_name_t *name, *nextname, *prevname, *zonecut;
+	dns_rdata_dnskey_t dnskey;
+	dns_rdata_t rdata = DNS_RDATA_INIT;
+	dns_rdataset_t keyset, soaset;
+	dns_rdataset_t keysigs, soasigs;
+	dns_rdataset_t nsecset, nsecsigs;
+	dns_rdataset_t nsec3paramset, nsec3paramsigs;
+	int i;
+	bool done = false;
+	bool first = true;
+	bool goodksk = false;
+	bool goodzsk = false;
+	isc_result_t result, vresult = ISC_R_UNSET;
+	unsigned char revoked_ksk[256];
+	unsigned char revoked_zsk[256];
+	unsigned char standby_ksk[256];
+	unsigned char standby_zsk[256];
+	unsigned char ksk_algorithms[256];
+	unsigned char zsk_algorithms[256];
+	unsigned char bad_algorithms[256];
+	unsigned char act_algorithms[256];
+
+	result = isc_heap_create(mctx, chain_compare, NULL, 1024,
+				 &expected_chains);
+	check_result(result, "isc_heap_create()");
+	result = isc_heap_create(mctx, chain_compare, NULL, 1024,
+				 &found_chains);
+	check_result(result, "isc_heap_create()");
+
+	result = dns_db_findnode(db, origin, false, &node);
+	if (result != ISC_R_SUCCESS)
+		fatal("failed to find the zone's origin: %s",
+		      isc_result_totext(result));
+
+	dns_rdataset_init(&keyset);
+	dns_rdataset_init(&keysigs);
+	dns_rdataset_init(&soaset);
+	dns_rdataset_init(&soasigs);
+	dns_rdataset_init(&nsecset);
+	dns_rdataset_init(&nsecsigs);
+	dns_rdataset_init(&nsec3paramset);
+	dns_rdataset_init(&nsec3paramsigs);
+	result = dns_db_findrdataset(db, node, ver, dns_rdatatype_dnskey,
+				     0, 0, &keyset, &keysigs);
+	if (result != ISC_R_SUCCESS)
+		fatal("Zone contains no DNSSEC keys\n");
+
+	result = dns_db_findrdataset(db, node, ver, dns_rdatatype_soa,
+				     0, 0, &soaset, &soasigs);
+	if (result != ISC_R_SUCCESS)
+		fatal("Zone contains no SOA record\n");
+
+	result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec,
+				     0, 0, &nsecset, &nsecsigs);
+	if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND)
+		fatal("NSEC lookup failed\n");
+
+	result = dns_db_findrdataset(db, node, ver, dns_rdatatype_nsec3param,
+				     0, 0, &nsec3paramset, &nsec3paramsigs);
+	if (result != ISC_R_SUCCESS && result != ISC_R_NOTFOUND)
+		fatal("NSEC3PARAM lookup failed\n");
+
+	if (!dns_rdataset_isassociated(&keysigs))
+		fatal("DNSKEY is not signed (keys offline or inactive?)\n");
+
+	if (!dns_rdataset_isassociated(&soasigs))
+		fatal("SOA is not signed (keys offline or inactive?)\n");
+
+	if (dns_rdataset_isassociated(&nsecset) &&
+	    !dns_rdataset_isassociated(&nsecsigs))
+		fatal("NSEC is not signed (keys offline or inactive?)\n");
+
+	if (dns_rdataset_isassociated(&nsec3paramset) &&
+	    !dns_rdataset_isassociated(&nsec3paramsigs))
+		fatal("NSEC3PARAM is not signed (keys offline or inactive?)\n");
+
+	if (!dns_rdataset_isassociated(&nsecset) &&
+	    !dns_rdataset_isassociated(&nsec3paramset))
+		fatal("No valid NSEC/NSEC3 chain for testing\n");
+
+	dns_db_detachnode(db, &node);
+
+	memset(revoked_ksk, 0, sizeof(revoked_ksk));
+	memset(revoked_zsk, 0, sizeof(revoked_zsk));
+	memset(standby_ksk, 0, sizeof(standby_ksk));
+	memset(standby_zsk, 0, sizeof(standby_zsk));
+	memset(ksk_algorithms, 0, sizeof(ksk_algorithms));
+	memset(zsk_algorithms, 0, sizeof(zsk_algorithms));
+	memset(bad_algorithms, 0, sizeof(bad_algorithms));
+	memset(act_algorithms, 0, sizeof(act_algorithms));
+
+	/*
+	 * Check that the DNSKEY RR has at least one self signing KSK
+	 * and one ZSK per algorithm in it (or, if -x was used, one
+	 * self-signing KSK).
+	 */
+	for (result = dns_rdataset_first(&keyset);
+	     result == ISC_R_SUCCESS;
+	     result = dns_rdataset_next(&keyset)) {
+		dns_rdataset_current(&keyset, &rdata);
+		result = dns_rdata_tostruct(&rdata, &dnskey, NULL);
+		check_result(result, "dns_rdata_tostruct");
+
+		if ((dnskey.flags & DNS_KEYOWNER_ZONE) == 0)
+			;
+		else if ((dnskey.flags & DNS_KEYFLAG_REVOKE) != 0) {
+			if ((dnskey.flags & DNS_KEYFLAG_KSK) != 0 &&
+			    !dns_dnssec_selfsigns(&rdata, origin, &keyset,
+						  &keysigs, false,
+						  mctx)) {
+				char namebuf[DNS_NAME_FORMATSIZE];
+				char buffer[1024];
+				isc_buffer_t buf;
+
+				dns_name_format(origin, namebuf,
+						sizeof(namebuf));
+				isc_buffer_init(&buf, buffer, sizeof(buffer));
+				result = dns_rdata_totext(&rdata, NULL, &buf);
+				check_result(result, "dns_rdata_totext");
+				fatal("revoked KSK is not self signed:\n"
+				      "%s DNSKEY %.*s", namebuf,
+				      (int)isc_buffer_usedlength(&buf), buffer);
+			}
+			if ((dnskey.flags & DNS_KEYFLAG_KSK) != 0 &&
+			     revoked_ksk[dnskey.algorithm] != 255)
+				revoked_ksk[dnskey.algorithm]++;
+			else if ((dnskey.flags & DNS_KEYFLAG_KSK) == 0 &&
+				 revoked_zsk[dnskey.algorithm] != 255)
+				revoked_zsk[dnskey.algorithm]++;
+		} else if ((dnskey.flags & DNS_KEYFLAG_KSK) != 0) {
+			if (dns_dnssec_selfsigns(&rdata, origin, &keyset,
+						 &keysigs, false, mctx)) {
+				if (ksk_algorithms[dnskey.algorithm] != 255)
+					ksk_algorithms[dnskey.algorithm]++;
+				goodksk = true;
+			} else {
+				if (standby_ksk[dnskey.algorithm] != 255)
+					standby_ksk[dnskey.algorithm]++;
+			}
+		} else if (dns_dnssec_selfsigns(&rdata, origin, &keyset,
+						&keysigs, false, mctx)) {
+			if (zsk_algorithms[dnskey.algorithm] != 255)
+				zsk_algorithms[dnskey.algorithm]++;
+			goodzsk = true;
+		} else if (dns_dnssec_signs(&rdata, origin, &soaset,
+					    &soasigs, false, mctx)) {
+			if (zsk_algorithms[dnskey.algorithm] != 255)
+				zsk_algorithms[dnskey.algorithm]++;
+		} else {
+			if (standby_zsk[dnskey.algorithm] != 255)
+				standby_zsk[dnskey.algorithm]++;
+		}
+		dns_rdata_freestruct(&dnskey);
+		dns_rdata_reset(&rdata);
+	}
+	dns_rdataset_disassociate(&keysigs);
+	dns_rdataset_disassociate(&soaset);
+	dns_rdataset_disassociate(&soasigs);
+	if (dns_rdataset_isassociated(&nsecsigs))
+		dns_rdataset_disassociate(&nsecsigs);
+	if (dns_rdataset_isassociated(&nsec3paramsigs))
+		dns_rdataset_disassociate(&nsec3paramsigs);
+
+	if (ignore_kskflag ) {
+		if (!goodksk && !goodzsk)
+			fatal("No self-signed DNSKEY found.");
+	} else if (!goodksk)
+		fatal("No self-signed KSK DNSKEY found.  Supply an active\n"
+		      "key with the KSK flag set, or use '-P'.");
+
+	fprintf(stderr, "Verifying the zone using the following algorithms:");
+	for (i = 0; i < 256; i++) {
+		if (ignore_kskflag)
+			act_algorithms[i] = (ksk_algorithms[i] != 0 ||
+					     zsk_algorithms[i] != 0) ? 1 : 0;
+		else
+			act_algorithms[i] = ksk_algorithms[i] != 0 ? 1 : 0;
+		if (act_algorithms[i] != 0) {
+			dns_secalg_format(i, algbuf, sizeof(algbuf));
+			fprintf(stderr, " %s", algbuf);
+		}
+	}
+	fprintf(stderr, ".\n");
+
+	if (!ignore_kskflag && !keyset_kskonly) {
+		for (i = 0; i < 256; i++) {
+			/*
+			 * The counts should both be zero or both be non-zero.
+			 * Mark the algorithm as bad if this is not met.
+			 */
+			if ((ksk_algorithms[i] != 0) ==
+			    (zsk_algorithms[i] != 0))
+				continue;
+			dns_secalg_format(i, algbuf, sizeof(algbuf));
+			fprintf(stderr, "Missing %s for algorithm %s\n",
+				(ksk_algorithms[i] != 0)
+				   ? "ZSK"
+				   : "self-signed KSK",
+				algbuf);
+			bad_algorithms[i] = 1;
+		}
+	}
+
+	/*
+	 * Check that all the other records were signed by keys that are
+	 * present in the DNSKEY RRSET.
+	 */
+
+	name = dns_fixedname_initname(&fname);
+	nextname = dns_fixedname_initname(&fnextname);
+	dns_fixedname_init(&fprevname);
+	prevname = NULL;
+	dns_fixedname_init(&fzonecut);
+	zonecut = NULL;
+
+	result = dns_db_createiterator(db, DNS_DB_NONSEC3, &dbiter);
+	check_result(result, "dns_db_createiterator()");
+
+	result = dns_dbiterator_first(dbiter);
+	check_result(result, "dns_dbiterator_first()");
+
+	while (!done) {
+		bool isdelegation = false;
+
+		result = dns_dbiterator_current(dbiter, &node, name);
+		check_dns_dbiterator_current(result);
+		if (!dns_name_issubdomain(name, origin)) {
+			check_no_nsec(name, node, db, ver);
+			dns_db_detachnode(db, &node);
+			result = dns_dbiterator_next(dbiter);
+			if (result == ISC_R_NOMORE)
+				done = true;
+			else
+				check_result(result, "dns_dbiterator_next()");
+			continue;
+		}
+		if (is_delegation(db, ver, origin, name, node, NULL)) {
+			zonecut = dns_fixedname_name(&fzonecut);
+			dns_name_copy(name, zonecut, NULL);
+			isdelegation = true;
+		} else if (has_dname(db, ver, node)) {
+			zonecut = dns_fixedname_name(&fzonecut);
+			dns_name_copy(name, zonecut, NULL);
+		}
+		nextnode = NULL;
+		result = dns_dbiterator_next(dbiter);
+		while (result == ISC_R_SUCCESS) {
+			result = dns_dbiterator_current(dbiter, &nextnode,
+							nextname);
+			check_dns_dbiterator_current(result);
+			if (!dns_name_issubdomain(nextname, origin) ||
+			    (zonecut != NULL &&
+			     dns_name_issubdomain(nextname, zonecut)))
+			{
+				check_no_nsec(nextname, nextnode, db, ver);
+				dns_db_detachnode(db, &nextnode);
+				result = dns_dbiterator_next(dbiter);
+				continue;
+			}
+			if (is_empty(db, ver, nextnode)) {
+				dns_db_detachnode(db, &nextnode);
+				result = dns_dbiterator_next(dbiter);
+				continue;
+			}
+			dns_db_detachnode(db, &nextnode);
+			break;
+		}
+		if (result == ISC_R_NOMORE) {
+			done = true;
+			nextname = origin;
+		} else if (result != ISC_R_SUCCESS)
+			fatal("iterating through the database failed: %s",
+			      isc_result_totext(result));
+		result = verifynode(db, ver, origin, mctx, name, node,
+				    isdelegation, &keyset, act_algorithms,
+				    bad_algorithms, &nsecset, &nsec3paramset,
+				    nextname);
+		if (vresult == ISC_R_UNSET)
+			vresult = ISC_R_SUCCESS;
+		if (vresult == ISC_R_SUCCESS && result != ISC_R_SUCCESS)
+			vresult = result;
+		if (prevname != NULL) {
+			result = verifyemptynodes(db, ver, origin, mctx, name,
+						  prevname, isdelegation,
+						  &nsec3paramset);
+		} else
+			prevname = dns_fixedname_name(&fprevname);
+		dns_name_copy(name, prevname, NULL);
+		if (vresult == ISC_R_SUCCESS && result != ISC_R_SUCCESS)
+			vresult = result;
+		dns_db_detachnode(db, &node);
+	}
+
+	dns_dbiterator_destroy(&dbiter);
+
+	result = dns_db_createiterator(db, DNS_DB_NSEC3ONLY, &dbiter);
+	check_result(result, "dns_db_createiterator()");
+
+	for (result = dns_dbiterator_first(dbiter);
+	     result == ISC_R_SUCCESS;
+	     result = dns_dbiterator_next(dbiter) ) {
+		result = dns_dbiterator_current(dbiter, &node, name);
+		check_dns_dbiterator_current(result);
+		result = verifynode(db, ver, origin, mctx, name, node,
+				    false, &keyset, act_algorithms,
+				    bad_algorithms, NULL, NULL, NULL);
+		check_result(result, "verifynode");
+		record_found(db, ver, mctx, name, node, &nsec3paramset);
+		dns_db_detachnode(db, &node);
+	}
+	dns_dbiterator_destroy(&dbiter);
+
+	dns_rdataset_disassociate(&keyset);
+	if (dns_rdataset_isassociated(&nsecset))
+		dns_rdataset_disassociate(&nsecset);
+	if (dns_rdataset_isassociated(&nsec3paramset))
+		dns_rdataset_disassociate(&nsec3paramset);
+
+	result = verify_nsec3_chains(mctx);
+	if (vresult == ISC_R_UNSET)
+		vresult = ISC_R_SUCCESS;
+	if (result != ISC_R_SUCCESS && vresult == ISC_R_SUCCESS)
+		vresult = result;
+	isc_heap_destroy(&expected_chains);
+	isc_heap_destroy(&found_chains);
+
+	/*
+	 * If we made it this far, we have what we consider a properly signed
+	 * zone.  Set the good flag.
+	 */
+	for (i = 0; i < 256; i++) {
+		if (bad_algorithms[i] != 0) {
+			if (first)
+				fprintf(stderr, "The zone is not fully signed "
+					"for the following algorithms:");
+			dns_secalg_format(i, algbuf, sizeof(algbuf));
+			fprintf(stderr, " %s", algbuf);
+			first = false;
+		}
+	}
+	if (!first) {
+		fprintf(stderr, ".\n");
+		fatal("DNSSEC completeness test failed.");
+	}
+
+	if (vresult != ISC_R_SUCCESS)
+		fatal("DNSSEC completeness test failed (%s).",
+		      dns_result_totext(vresult));
+
+	if (goodksk || ignore_kskflag) {
+		/*
+		 * Print the success summary.
+		 */
+		fprintf(stderr, "Zone fully signed:\n");
+		for (i = 0; i < 256; i++) {
+			if ((ksk_algorithms[i] != 0) ||
+			    (standby_ksk[i] != 0) ||
+			    (revoked_ksk[i] != 0) ||
+			    (zsk_algorithms[i] != 0) ||
+			    (standby_zsk[i] != 0) ||
+			    (revoked_zsk[i] != 0)) {
+				dns_secalg_format(i, algbuf, sizeof(algbuf));
+				fprintf(stderr, "Algorithm: %s: KSKs: "
+					"%u active, %u stand-by, %u revoked\n",
+					algbuf, ksk_algorithms[i],
+					standby_ksk[i], revoked_ksk[i]);
+				fprintf(stderr, "%*sZSKs: "
+					"%u active, %u %s, %u revoked\n",
+					(int) strlen(algbuf) + 13, "",
+					zsk_algorithms[i],
+					standby_zsk[i],
+					keyset_kskonly ? "present" : "stand-by",
+					revoked_zsk[i]);
+			}
+		}
+	}
+}
+
+bool
+isoptarg(const char *arg, char **argv, void(*usage)(void)) {
+	if (!strcasecmp(isc_commandline_argument, arg)) {
+		if (argv[isc_commandline_index] == NULL) {
+			fprintf(stderr, "%s: missing argument -%c %s\n",
+				program, isc_commandline_option,
+				isc_commandline_argument);
+			usage();
+		}
+		isc_commandline_argument = argv[isc_commandline_index];
+		/* skip to next arguement */
+		isc_commandline_index++;
+		return (true);
+	}
+	return (false);
+}
+
+#ifdef _WIN32
+void
+InitSockets(void) {
+	WORD wVersionRequested;
+	WSADATA wsaData;
+	int err;
+
+	wVersionRequested = MAKEWORD(2, 0);
+
+	err = WSAStartup( wVersionRequested, &wsaData );
+	if (err != 0) {
+		fprintf(stderr, "WSAStartup() failed: %d\n", err);
+		exit(1);
+	}
+}
+
+void
+DestroySockets(void) {
+	WSACleanup();
+}
+#endif