Exemplo n.º 1
0
static void
rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
	unsigned char *raw = rdataset->private5;
	isc_region_t r;
	unsigned int length;
	unsigned int flags = 0;

	REQUIRE(raw != NULL);

	length = raw[0] * 256 + raw[1];
#if DNS_RDATASET_FIXED
	raw += 4;
#else
	raw += 2;
#endif
	if (rdataset->type == dns_rdatatype_rrsig) {
		if (*raw & DNS_RDATASLAB_OFFLINE)
			flags |= DNS_RDATA_OFFLINE;
		length--;
		raw++;
	}
	r.length = length;
	r.base = raw;
	dns_rdata_fromregion(rdata, rdataset->rdclass, rdataset->type, &r);
	rdata->flags |= flags;
}
Exemplo n.º 2
0
static isc_result_t
rdata_clone(isc_mem_t *mctx, dns_rdata_t *source, dns_rdata_t **targetp)
{
	isc_result_t result;
	dns_rdata_t *target = NULL;
	isc_region_t target_region, source_region;

	REQUIRE(mctx != NULL);
	REQUIRE(source != NULL);
	REQUIRE(targetp != NULL && *targetp == NULL);

	CHECKED_MEM_GET_PTR(mctx, target);

	dns_rdata_init(target);

	dns_rdata_toregion(source, &source_region);

	CHECKED_MEM_GET(mctx, target_region.base, source_region.length);

	target_region.length = source_region.length;
	memcpy(target_region.base, source_region.base, source_region.length);
	dns_rdata_fromregion(target, source->rdclass, source->type,
			     &target_region);

	*targetp = target;

	return ISC_R_SUCCESS;

cleanup:
	SAFE_MEM_PUT_PTR(mctx, target);

	return result;
}
Exemplo n.º 3
0
/*
 * Make the dns_rdata_t 'rdata' refer to the slab item
 * beginning at '*current', which is part of a slab of type
 * 'type' and class 'rdclass', and advance '*current' to
 * point to the next item in the slab.
 */
static inline void
rdata_from_slab(unsigned char **current,
	      dns_rdataclass_t rdclass, dns_rdatatype_t type,
	      dns_rdata_t *rdata)
{
	unsigned char *tcurrent = *current;
	isc_region_t region;
	unsigned int length;
	isc_boolean_t offline = ISC_FALSE;

	length = *tcurrent++ * 256;
	length += *tcurrent++;

	if (type == dns_rdatatype_rrsig) {
		if ((*tcurrent & DNS_RDATASLAB_OFFLINE) != 0)
			offline = ISC_TRUE;
		length--;
		tcurrent++;
	}
	region.length = length;
#if DNS_RDATASET_FIXED
	tcurrent += 2;
#endif
	region.base = tcurrent;
	tcurrent += region.length;
	dns_rdata_fromregion(rdata, rdclass, type, &region);
	if (offline)
		rdata->flags |= DNS_RDATA_OFFLINE;
	*current = tcurrent;
}
Exemplo n.º 4
0
static isc_result_t
add_rdata_to_list(dns_message_t *msg, dns_name_t *name, dns_rdata_t *rdata,
		isc_uint32_t ttl, dns_namelist_t *namelist)
{
	isc_result_t result;
	isc_region_t r, newr;
	dns_rdata_t *newrdata = NULL;
	dns_name_t *newname = NULL;
	dns_rdatalist_t *newlist = NULL;
	dns_rdataset_t *newset = NULL;
	isc_buffer_t *tmprdatabuf = NULL;

	RETERR(dns_message_gettemprdata(msg, &newrdata));

	dns_rdata_toregion(rdata, &r);
	RETERR(isc_buffer_allocate(msg->mctx, &tmprdatabuf, r.length));
	isc_buffer_availableregion(tmprdatabuf, &newr);
	memcpy(newr.base, r.base, r.length);
	dns_rdata_fromregion(newrdata, rdata->rdclass, rdata->type, &newr);
	dns_message_takebuffer(msg, &tmprdatabuf);

	RETERR(dns_message_gettempname(msg, &newname));
	dns_name_init(newname, NULL);
	RETERR(dns_name_dup(name, msg->mctx, newname));

	RETERR(dns_message_gettemprdatalist(msg, &newlist));
	newlist->rdclass = newrdata->rdclass;
	newlist->type = newrdata->type;
	newlist->covers = 0;
	newlist->ttl = ttl;
	ISC_LIST_INIT(newlist->rdata);
	ISC_LIST_APPEND(newlist->rdata, newrdata, link);

	RETERR(dns_message_gettemprdataset(msg, &newset));
	dns_rdataset_init(newset);
	RETERR(dns_rdatalist_tordataset(newlist, newset));

	ISC_LIST_INIT(newname->list);
	ISC_LIST_APPEND(newname->list, newset, link);

	ISC_LIST_APPEND(*namelist, newname, link);

	return (ISC_R_SUCCESS);

 failure:
	if (newrdata != NULL) {
		if (ISC_LINK_LINKED(newrdata, link))
			ISC_LIST_UNLINK(newlist->rdata, newrdata, link);
		dns_message_puttemprdata(msg, &newrdata);
	}
	if (newname != NULL)
		dns_message_puttempname(msg, &newname);
	if (newset != NULL) {
		dns_rdataset_disassociate(newset);
		dns_message_puttemprdataset(msg, &newset);
	}
	if (newlist != NULL)
		dns_message_puttemprdatalist(msg, &newlist);
	return (result);
}
Exemplo n.º 5
0
/*%
 * Configure an apex NS with an out-of-zone NS names for a static-stub zone.
 * For example, for the zone named "example.com", something like the following
 * RRs will be added to the zone DB:
 * example.com. NS ns.example.net.
 */
static isc_result_t
configure_staticstub_servernames(const cfg_obj_t *zconfig, dns_zone_t *zone,
				 dns_rdatalist_t *rdatalist, const char *zname)
{
	const cfg_listelt_t *element;
	isc_mem_t *mctx = dns_zone_getmctx(zone);
	dns_rdata_t *rdata;
	isc_region_t sregion, region;
	isc_result_t result = ISC_R_SUCCESS;

	for (element = cfg_list_first(zconfig);
	     element != NULL;
	     element = cfg_list_next(element))
	{
		const cfg_obj_t *obj;
		const char *str;
		dns_fixedname_t fixed_name;
		dns_name_t *nsname;
		isc_buffer_t b;

		obj = cfg_listelt_value(element);
		str = cfg_obj_asstring(obj);

		dns_fixedname_init(&fixed_name);
		nsname = dns_fixedname_name(&fixed_name);

		isc_buffer_init(&b, str, strlen(str));
		isc_buffer_add(&b, strlen(str));
		result = dns_name_fromtext(nsname, &b, dns_rootname, 0, NULL);
		if (result != ISC_R_SUCCESS) {
			cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
					    "server-name '%s' is not a valid "
					    "name", str);
			return (result);
		}
		if (dns_name_issubdomain(nsname, dns_zone_getorigin(zone))) {
			cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
				    "server-name '%s' must not be a "
				    "subdomain of zone name '%s'",
				    str, zname);
			return (ISC_R_FAILURE);
		}

		dns_name_toregion(nsname, &sregion);
		rdata = isc_mem_get(mctx, sizeof(*rdata) + sregion.length);
		if (rdata == NULL)
			return (ISC_R_NOMEMORY);
		region.length = sregion.length;
		region.base = (unsigned char *)(rdata + 1);
		memcpy(region.base, sregion.base, region.length);
		dns_rdata_init(rdata);
		dns_rdata_fromregion(rdata, dns_zone_getclass(zone),
				     dns_rdatatype_ns, &region);
		ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
	}

	return (result);
}
Exemplo n.º 6
0
static void
rdataset_current(dns_rdataset_t *rdataset, dns_rdata_t *rdata) {
	unsigned char *raw = rdataset->private5;
	isc_region_t r;

	REQUIRE(raw != NULL);

	r.length = raw[0] * 256 + raw[1];
	raw += 2;
	r.base = raw;
	dns_rdata_fromregion(rdata, rdataset->rdclass, rdataset->type, &r);
}
Exemplo n.º 7
0
static void
parse_rdata(isc_mem_t *mctx, char **cmdlinep, dns_rdataclass_t rdataclass,
	    dns_rdatatype_t rdatatype, dns_rdata_t *rdata)
{
	char *cmdline = *cmdlinep;
	isc_buffer_t source, *buf = NULL, *newbuf = NULL;
	isc_region_t r;
	isc_lex_t *lex = NULL;
	dns_rdatacallbacks_t callbacks;
	isc_result_t result;

	while (cmdline != NULL && *cmdline != 0 &&
	       isspace((unsigned char)*cmdline))
		cmdline++;

	if (cmdline != NULL && *cmdline != 0) {
		dns_rdatacallbacks_init(&callbacks);
		result = isc_lex_create(mctx, strlen(cmdline), &lex);
		check_result(result, "isc_lex_create");
		isc_buffer_init(&source, cmdline, strlen(cmdline));
		isc_buffer_add(&source, strlen(cmdline));
		result = isc_lex_openbuffer(lex, &source);
		check_result(result, "isc_lex_openbuffer");
		result = isc_buffer_allocate(mctx, &buf, MAXWIRE);
		check_result(result, "isc_buffer_allocate");
		result = dns_rdata_fromtext(rdata, rdataclass, rdatatype, lex,
					    dns_rootname, 0, mctx, buf,
					    &callbacks);
		isc_lex_destroy(&lex);
		if (result == ISC_R_SUCCESS) {
			isc_buffer_usedregion(buf, &r);
			result = isc_buffer_allocate(mctx, &newbuf, r.length);
			check_result(result, "isc_buffer_allocate");
			isc_buffer_putmem(newbuf, r.base, r.length);
			isc_buffer_usedregion(newbuf, &r);
			dns_rdata_reset(rdata);
			dns_rdata_fromregion(rdata, rdataclass, rdatatype, &r);
			isc_buffer_free(&buf);
			ISC_LIST_APPEND(usedbuffers, newbuf, link);
		} else {
			fprintf(stderr, "invalid rdata format: %s\n",
				isc_result_totext(result));
			isc_buffer_free(&buf);
			exit(1);
		}
	} else {
		rdata->flags = DNS_RDATA_UPDATE;
	}
	*cmdlinep = cmdline;
}
Exemplo n.º 8
0
static void
loadkey(char *filename, unsigned char *key_buf, unsigned int key_buf_size,
	dns_rdata_t *rdata)
{
	isc_result_t  result;
	dst_key_t     *key = NULL;
	isc_buffer_t  keyb;
	isc_region_t  r;

	dns_rdata_init(rdata);

	isc_buffer_init(&keyb, key_buf, key_buf_size);

	result = dst_key_fromnamedfile(filename, NULL, DST_TYPE_PUBLIC,
				       mctx, &key);
	if (result != ISC_R_SUCCESS)
		fatal("invalid keyfile name %s: %s",
		      filename, isc_result_totext(result));

	if (verbose > 2) {
		char keystr[DST_KEY_FORMATSIZE];

		dst_key_format(key, keystr, sizeof(keystr));
		fprintf(stderr, "%s: %s\n", program, keystr);
	}

	result = dst_key_todns(key, &keyb);
	if (result != ISC_R_SUCCESS)
		fatal("can't decode key");

	isc_buffer_usedregion(&keyb, &r);
	dns_rdata_fromregion(rdata, dst_key_class(key),
			     dns_rdatatype_dnskey, &r);

	rdclass = dst_key_class(key);

	dns_fixedname_init(&fixed);
	name = dns_fixedname_name(&fixed);
	result = dns_name_copy(dst_key_name(key), name, NULL);
	if (result != ISC_R_SUCCESS)
		fatal("can't copy name");

	dst_key_free(&key);
}
Exemplo n.º 9
0
static isc_result_t
add_mac(dst_context_t *tsigctx, isc_buffer_t *buf) {
	dns_rdata_any_tsig_t tsig;
	dns_rdata_t rdata = DNS_RDATA_INIT;
	isc_buffer_t databuf;
	isc_region_t r;
	isc_result_t result;
	unsigned char tsigbuf[1024];

	isc_buffer_usedregion(buf, &r);
	dns_rdata_fromregion(&rdata, dns_rdataclass_any,
			     dns_rdatatype_tsig, &r);
	isc_buffer_init(&databuf, tsigbuf, sizeof(tsigbuf));
	CHECK(dns_rdata_tostruct(&rdata, &tsig, NULL));
	isc_buffer_putuint16(&databuf, tsig.siglen);
	isc_buffer_putmem(&databuf, tsig.signature, tsig.siglen);
	isc_buffer_usedregion(&databuf, &r);
	result = dst_context_adddata(tsigctx, &r);
	dns_rdata_freestruct(&tsig);
 cleanup:
	return (result);
}
Exemplo n.º 10
0
/*%
 * Writes a public key to disk in DNS format.
 */
static isc_result_t
write_public_key(const dst_key_t *key, int type, const char *directory) {
	FILE *fp;
	isc_buffer_t keyb, textb, fileb, classb;
	isc_region_t r;
	char filename[ISC_DIR_NAMEMAX];
	unsigned char key_array[DST_KEY_MAXSIZE];
	char text_array[DST_KEY_MAXTEXTSIZE];
	char class_array[10];
	isc_result_t ret;
	dns_rdata_t rdata = DNS_RDATA_INIT;
	isc_fsaccess_t access;

	REQUIRE(VALID_KEY(key));

	isc_buffer_init(&keyb, key_array, sizeof(key_array));
	isc_buffer_init(&textb, text_array, sizeof(text_array));
	isc_buffer_init(&classb, class_array, sizeof(class_array));

	ret = dst_key_todns(key, &keyb);
	if (ret != ISC_R_SUCCESS)
		return (ret);

	isc_buffer_usedregion(&keyb, &r);
	dns_rdata_fromregion(&rdata, key->key_class, dns_rdatatype_dnskey, &r);

	ret = dns_rdata_totext(&rdata, (dns_name_t *) NULL, &textb);
	if (ret != ISC_R_SUCCESS)
		return (DST_R_INVALIDPUBLICKEY);

	ret = dns_rdataclass_totext(key->key_class, &classb);
	if (ret != ISC_R_SUCCESS)
		return (DST_R_INVALIDPUBLICKEY);

	/*
	 * Make the filename.
	 */
	isc_buffer_init(&fileb, filename, sizeof(filename));
	ret = dst_key_buildfilename(key, DST_TYPE_PUBLIC, directory, &fileb);
	if (ret != ISC_R_SUCCESS)
		return (ret);

	/*
	 * Create public key file.
	 */
	if ((fp = fopen(filename, "w")) == NULL)
		return (DST_R_WRITEERROR);

	if (issymmetric(key)) {
		access = 0;
		isc_fsaccess_add(ISC_FSACCESS_OWNER,
				 ISC_FSACCESS_READ | ISC_FSACCESS_WRITE,
				 &access);
		(void)isc_fsaccess_set(filename, access);
	}

	/* Write key information in comments */
	if ((type & DST_TYPE_KEY) == 0) {
		fprintf(fp, "; This is a %s%s-signing key, keyid %d, for ",
			(key->key_flags & DNS_KEYFLAG_REVOKE) != 0 ?
				"revoked " :
				"",
			(key->key_flags & DNS_KEYFLAG_KSK) != 0 ?
				"key" :
				"zone",
			key->key_id);
		ret = dns_name_print(key->key_name, fp);
		if (ret != ISC_R_SUCCESS) {
			fclose(fp);
			return (ret);
		}
		fputc('\n', fp);

		printtime(key, DST_TIME_CREATED, "; Created", fp);
		printtime(key, DST_TIME_PUBLISH, "; Publish", fp);
		printtime(key, DST_TIME_ACTIVATE, "; Activate", fp);
		printtime(key, DST_TIME_REVOKE, "; Revoke", fp);
		printtime(key, DST_TIME_INACTIVE, "; Inactive", fp);
		printtime(key, DST_TIME_DELETE, "; Delete", fp);
	}

	/* Now print the actual key */
	ret = dns_name_print(key->key_name, fp);
	fprintf(fp, " ");

	if (key->key_ttl != 0)
		fprintf(fp, "%d ", key->key_ttl);

	isc_buffer_usedregion(&classb, &r);
	if ((unsigned) fwrite(r.base, 1, r.length, fp) != r.length)
	       ret = DST_R_WRITEERROR;

	if ((type & DST_TYPE_KEY) != 0)
		fprintf(fp, " KEY ");
	else
		fprintf(fp, " DNSKEY ");

	isc_buffer_usedregion(&textb, &r);
	if ((unsigned) fwrite(r.base, 1, r.length, fp) != r.length)
	       ret = DST_R_WRITEERROR;

	fputc('\n', fp);
	fflush(fp);
	if (ferror(fp))
		ret = DST_R_WRITEERROR;
	fclose(fp);

	return (ret);
}
int
main(int argc, char *argv[]) {
	int i, ch;
	char *startstr = NULL, *endstr = NULL;
	dns_fixedname_t fdomain;
	dns_name_t *domain = NULL;
	char *output = NULL;
	char *endp;
	unsigned char data[65536];
	dns_db_t *db;
	dns_dbversion_t *version;
	dns_diff_t diff;
	dns_difftuple_t *tuple;
	dns_fixedname_t tname;
	dst_key_t *key = NULL;
	dns_rdata_t rdata = DNS_RDATA_INIT;
	dns_rdataset_t rdataset;
	dns_rdataclass_t rdclass;
	isc_result_t result;
	isc_buffer_t b;
	isc_region_t r;
	isc_log_t *log = NULL;
	keynode_t *keynode;
	unsigned int eflags;
	isc_boolean_t pseudorandom = ISC_FALSE;
	isc_boolean_t tryverify = ISC_FALSE;

	result = isc_mem_create(0, 0, &mctx);
	if (result != ISC_R_SUCCESS)
		fatal("failed to create memory context: %s",
		      isc_result_totext(result));

	dns_result_register();

	while ((ch = isc_commandline_parse(argc, argv, "as:e:t:r:v:ph")) != -1)
	{
		switch (ch) {
		case 'a':
			tryverify = ISC_TRUE;
			break;
		case 's':
			startstr = isc_commandline_argument;
			break;

		case 'e':
			endstr = isc_commandline_argument;
			break;

		case 't':
			endp = NULL;
			ttl = strtol(isc_commandline_argument, &endp, 0);
			if (*endp != '\0')
				fatal("TTL must be numeric");
			break;

		case 'r':
			setup_entropy(mctx, isc_commandline_argument, &ectx);
			break;

		case 'v':
			endp = NULL;
			verbose = strtol(isc_commandline_argument, &endp, 0);
			if (*endp != '\0')
				fatal("verbose level must be numeric");
			break;

		case 'p':
			pseudorandom = ISC_TRUE;
			break;

		case 'h':
		default:
			usage();

		}
	}

	argc -= isc_commandline_index;
	argv += isc_commandline_index;

	if (argc < 1)
		usage();

	if (ectx == NULL)
		setup_entropy(mctx, NULL, &ectx);
	eflags = ISC_ENTROPY_BLOCKING;
	if (!pseudorandom)
		eflags |= ISC_ENTROPY_GOODONLY;
	result = dst_lib_init(mctx, ectx, eflags);
	if (result != ISC_R_SUCCESS)
		fatal("could not initialize dst: %s", 
		      isc_result_totext(result));

	isc_stdtime_get(&now);

	if (startstr != NULL)
		starttime = strtotime(startstr, now, now);
	else
		starttime = now;

	if (endstr != NULL)
		endtime = strtotime(endstr, now, starttime);
	else
		endtime = starttime + (30 * 24 * 60 * 60);

	if (ttl == -1) {
		ttl = 3600;
		fprintf(stderr, "%s: TTL not specified, assuming 3600\n",
			program);
	}

	setup_logging(verbose, mctx, &log);

	dns_diff_init(mctx, &diff);
	rdclass = 0;

	ISC_LIST_INIT(keylist);

	for (i = 0; i < argc; i++) {
		char namestr[DNS_NAME_FORMATSIZE];
		isc_buffer_t namebuf;

		key = NULL;
		result = dst_key_fromnamedfile(argv[i], DST_TYPE_PUBLIC,
					       mctx, &key);
		if (result != ISC_R_SUCCESS)
			fatal("error loading key from %s: %s", argv[i],
			      isc_result_totext(result));
		if (rdclass == 0)
			rdclass = dst_key_class(key);

		isc_buffer_init(&namebuf, namestr, sizeof(namestr));
		result = dns_name_tofilenametext(dst_key_name(key),
						 ISC_FALSE,
						 &namebuf);
		check_result(result, "dns_name_tofilenametext");
		isc_buffer_putuint8(&namebuf, 0);

		if (domain == NULL) {
			dns_fixedname_init(&fdomain);
			domain = dns_fixedname_name(&fdomain);
			dns_name_copy(dst_key_name(key), domain, NULL);
		} else if (!dns_name_equal(domain, dst_key_name(key))) {
			char str[DNS_NAME_FORMATSIZE];
			dns_name_format(domain, str, sizeof(str));
			fatal("all keys must have the same owner - %s "
			      "and %s do not match", str, namestr);
		}

		if (output == NULL) {
			output = isc_mem_allocate(mctx,
						  strlen("keyset-") +
						  strlen(namestr) + 1);
			if (output == NULL)
				fatal("out of memory");
			sprintf(output, "keyset-%s", namestr);
		}

		if (dst_key_iszonekey(key)) {
			dst_key_t *zonekey = NULL;
			result = dst_key_fromnamedfile(argv[i],
						       DST_TYPE_PUBLIC |
						       DST_TYPE_PRIVATE,
						       mctx, &zonekey);
			if (result != ISC_R_SUCCESS)
				fatal("failed to read private key %s: %s",
				      argv[i], isc_result_totext(result));
			if (!zonekey_on_list(zonekey)) {
				keynode = isc_mem_get(mctx, sizeof(keynode_t));
				if (keynode == NULL)
					fatal("out of memory");
				keynode->key = zonekey;
				ISC_LIST_INITANDAPPEND(keylist, keynode, link);
			} else
				dst_key_free(&zonekey);
		}
		dns_rdata_reset(&rdata);
		isc_buffer_init(&b, data, sizeof(data));
		result = dst_key_todns(key, &b);
		dst_key_free(&key);
		if (result != ISC_R_SUCCESS)
			fatal("failed to convert key %s to a DNS KEY: %s",
			      argv[i], isc_result_totext(result));
		isc_buffer_usedregion(&b, &r);
		dns_rdata_fromregion(&rdata, rdclass, dns_rdatatype_dnskey, &r);
		tuple = NULL;
		result = dns_difftuple_create(mctx, DNS_DIFFOP_ADD,
					      domain, ttl, &rdata, &tuple);
		check_result(result, "dns_difftuple_create");
		dns_diff_append(&diff, &tuple);
	}

	db = NULL;
	result = dns_db_create(mctx, "rbt", dns_rootname, dns_dbtype_zone,
			       rdclass, 0, NULL, &db);
	if (result != ISC_R_SUCCESS)
		fatal("failed to create a database");

	version = NULL;
	dns_db_newversion(db, &version);

	result = dns_diff_apply(&diff, db, version);
	check_result(result, "dns_diff_apply");
	dns_diff_clear(&diff);

	dns_fixedname_init(&tname);
	dns_rdataset_init(&rdataset);
	result = dns_db_find(db, domain, version, dns_rdatatype_dnskey, 0, 0,
			     NULL, dns_fixedname_name(&tname), &rdataset,
			     NULL);
	check_result(result, "dns_db_find");

	if (ISC_LIST_EMPTY(keylist))
		fprintf(stderr,
			"%s: no private zone key found; not self-signing\n",
			program);
	for (keynode = ISC_LIST_HEAD(keylist);
	     keynode != NULL;
	     keynode = ISC_LIST_NEXT(keynode, link))
	{
		dns_rdata_reset(&rdata);
		isc_buffer_init(&b, data, sizeof(data));
		result = dns_dnssec_sign(domain, &rdataset, keynode->key,
					 &starttime, &endtime, mctx, &b,
					 &rdata);
		isc_entropy_stopcallbacksources(ectx);
		if (result != ISC_R_SUCCESS) {
			char keystr[KEY_FORMATSIZE];
			key_format(keynode->key, keystr, sizeof(keystr));
			fatal("failed to sign keyset with key %s: %s",
			      keystr, isc_result_totext(result));
		}
		if (tryverify) {
			result = dns_dnssec_verify(domain, &rdataset,
						   keynode->key, ISC_TRUE,
						   mctx, &rdata);
			if (result != ISC_R_SUCCESS) {
				char keystr[KEY_FORMATSIZE];
				key_format(keynode->key, keystr, sizeof(keystr));
				fatal("signature from key '%s' failed to "
				      "verify: %s",
				      keystr, isc_result_totext(result));
			}
		}
		tuple = NULL;
		result = dns_difftuple_create(mctx, DNS_DIFFOP_ADD,
					      domain, ttl, &rdata, &tuple);
		check_result(result, "dns_difftuple_create");
		dns_diff_append(&diff, &tuple);
	}

	result = dns_diff_apply(&diff, db, version);
	check_result(result, "dns_diff_apply");
	dns_diff_clear(&diff);

	dns_rdataset_disassociate(&rdataset);

	dns_db_closeversion(db, &version, ISC_TRUE);
	result = dns_db_dump(db, version, output);
	if (result != ISC_R_SUCCESS) {
		char domainstr[DNS_NAME_FORMATSIZE];
		dns_name_format(domain, domainstr, sizeof(domainstr));
		fatal("failed to write database for %s to %s",
		      domainstr, output);
	}

	printf("%s\n", output);

	dns_db_detach(&db);

	while (!ISC_LIST_EMPTY(keylist)) {
		keynode = ISC_LIST_HEAD(keylist);
		ISC_LIST_UNLINK(keylist, keynode, link);
		dst_key_free(&keynode->key);
		isc_mem_put(mctx, keynode, sizeof(keynode_t));
	}

	cleanup_logging(&log);
	cleanup_entropy(&ectx);

	isc_mem_free(mctx, output);
	dst_lib_destroy();
	if (verbose > 10)
		isc_mem_stats(mctx, stdout);
	isc_mem_destroy(&mctx);
	return (0);
}
Exemplo n.º 12
0
isc_result_t
dns_nsec_buildrdata(dns_db_t *db, dns_dbversion_t *version,
		    dns_dbnode_t *node, dns_name_t *target,
		    unsigned char *buffer, dns_rdata_t *rdata)
{
	isc_result_t result;
	dns_rdataset_t rdataset;
	isc_region_t r;
	unsigned int i;

	unsigned char *nsec_bits, *bm;
	unsigned int max_type;
	dns_rdatasetiter_t *rdsiter;

	memset(buffer, 0, DNS_NSEC_BUFFERSIZE);
	dns_name_toregion(target, &r);
	memcpy(buffer, r.base, r.length);
	r.base = buffer;
	/*
	 * Use the end of the space for a raw bitmap leaving enough
	 * space for the window identifiers and length octets.
	 */
	bm = r.base + r.length + 512;
	nsec_bits = r.base + r.length;
	dns_nsec_setbit(bm, dns_rdatatype_rrsig, 1);
	dns_nsec_setbit(bm, dns_rdatatype_nsec, 1);
	max_type = dns_rdatatype_nsec;
	dns_rdataset_init(&rdataset);
	rdsiter = NULL;
	result = dns_db_allrdatasets(db, node, version, 0, &rdsiter);
	if (result != ISC_R_SUCCESS)
		return (result);
	for (result = dns_rdatasetiter_first(rdsiter);
	     result == ISC_R_SUCCESS;
	     result = dns_rdatasetiter_next(rdsiter))
	{
		dns_rdatasetiter_current(rdsiter, &rdataset);
		if (rdataset.type != dns_rdatatype_nsec &&
		    rdataset.type != dns_rdatatype_nsec3 &&
		    rdataset.type != dns_rdatatype_rrsig) {
			if (rdataset.type > max_type)
				max_type = rdataset.type;
			dns_nsec_setbit(bm, rdataset.type, 1);
		}
		dns_rdataset_disassociate(&rdataset);
	}

	/*
	 * At zone cuts, deny the existence of glue in the parent zone.
	 */
	if (dns_nsec_isset(bm, dns_rdatatype_ns) &&
	    ! dns_nsec_isset(bm, dns_rdatatype_soa)) {
		for (i = 0; i <= max_type; i++) {
			if (dns_nsec_isset(bm, i) &&
			    ! dns_rdatatype_iszonecutauth((dns_rdatatype_t)i))
				dns_nsec_setbit(bm, i, 0);
		}
	}

	dns_rdatasetiter_destroy(&rdsiter);
	if (result != ISC_R_NOMORE)
		return (result);

	nsec_bits += dns_nsec_compressbitmap(nsec_bits, bm, max_type);

	r.length = nsec_bits - r.base;
	INSIST(r.length <= DNS_NSEC_BUFFERSIZE);
	dns_rdata_fromregion(rdata,
			     dns_db_class(db),
			     dns_rdatatype_nsec,
			     &r);

	return (ISC_R_SUCCESS);
}
Exemplo n.º 13
0
static isc_result_t
process_dhtkey(dns_message_t *msg, dns_name_t *signer, dns_name_t *name,
	       dns_rdata_tkey_t *tkeyin, dns_tkeyctx_t *tctx,
	       dns_rdata_tkey_t *tkeyout,
	       dns_tsig_keyring_t *ring, dns_namelist_t *namelist)
{
	isc_result_t result = ISC_R_SUCCESS;
	dns_name_t *keyname, ourname;
	dns_rdataset_t *keyset = NULL;
	dns_rdata_t keyrdata = DNS_RDATA_INIT, ourkeyrdata = DNS_RDATA_INIT;
	isc_boolean_t found_key = ISC_FALSE, found_incompatible = ISC_FALSE;
	dst_key_t *pubkey = NULL;
	isc_buffer_t ourkeybuf, *shared = NULL;
	isc_region_t r, r2, ourkeyr;
	unsigned char keydata[DST_KEY_MAXSIZE];
	unsigned int sharedsize;
	isc_buffer_t secret;
	unsigned char *randomdata = NULL, secretdata[256];
	dns_ttl_t ttl = 0;

	if (tctx->dhkey == NULL) {
		tkey_log("process_dhtkey: tkey-dhkey not defined");
		tkeyout->error = dns_tsigerror_badalg;
		return (DNS_R_REFUSED);
	}

	if (!dns_name_equal(&tkeyin->algorithm, DNS_TSIG_HMACMD5_NAME)) {
		tkey_log("process_dhtkey: algorithms other than "
			 "hmac-md5 are not supported");
		tkeyout->error = dns_tsigerror_badalg;
		return (ISC_R_SUCCESS);
	}

	/*
	 * Look for a DH KEY record that will work with ours.
	 */
	for (result = dns_message_firstname(msg, DNS_SECTION_ADDITIONAL);
	     result == ISC_R_SUCCESS && !found_key;
	     result = dns_message_nextname(msg, DNS_SECTION_ADDITIONAL)) {
		keyname = NULL;
		dns_message_currentname(msg, DNS_SECTION_ADDITIONAL, &keyname);
		keyset = NULL;
		result = dns_message_findtype(keyname, dns_rdatatype_key, 0,
					      &keyset);
		if (result != ISC_R_SUCCESS)
			continue;

		for (result = dns_rdataset_first(keyset);
		     result == ISC_R_SUCCESS && !found_key;
		     result = dns_rdataset_next(keyset)) {
			dns_rdataset_current(keyset, &keyrdata);
			pubkey = NULL;
			result = dns_dnssec_keyfromrdata(keyname, &keyrdata,
							 msg->mctx, &pubkey);
			if (result != ISC_R_SUCCESS) {
				dns_rdata_reset(&keyrdata);
				continue;
			}
			if (dst_key_alg(pubkey) == DNS_KEYALG_DH) {
				if (dst_key_paramcompare(pubkey, tctx->dhkey))
				{
					found_key = ISC_TRUE;
					ttl = keyset->ttl;
					break;
				} else
					found_incompatible = ISC_TRUE;
			}
			dst_key_free(&pubkey);
			dns_rdata_reset(&keyrdata);
		}
	}

	if (!found_key) {
		if (found_incompatible) {
			tkey_log("process_dhtkey: found an incompatible key");
			tkeyout->error = dns_tsigerror_badkey;
			return (ISC_R_SUCCESS);
		} else {
			tkey_log("process_dhtkey: failed to find a key");
			return (DNS_R_FORMERR);
		}
	}

	RETERR(add_rdata_to_list(msg, keyname, &keyrdata, ttl, namelist));

	isc_buffer_init(&ourkeybuf, keydata, sizeof(keydata));
	RETERR(dst_key_todns(tctx->dhkey, &ourkeybuf));
	isc_buffer_usedregion(&ourkeybuf, &ourkeyr);
	dns_rdata_fromregion(&ourkeyrdata, dns_rdataclass_any,
			     dns_rdatatype_key, &ourkeyr);

	dns_name_init(&ourname, NULL);
	dns_name_clone(dst_key_name(tctx->dhkey), &ourname);

	/*
	 * XXXBEW The TTL should be obtained from the database, if it exists.
	 */
	RETERR(add_rdata_to_list(msg, &ourname, &ourkeyrdata, 0, namelist));

	RETERR(dst_key_secretsize(tctx->dhkey, &sharedsize));
	RETERR(isc_buffer_allocate(msg->mctx, &shared, sharedsize));

	result = dst_key_computesecret(pubkey, tctx->dhkey, shared);
	if (result != ISC_R_SUCCESS) {
		tkey_log("process_dhtkey: failed to compute shared secret: %s",
			 isc_result_totext(result));
		goto failure;
	}
	dst_key_free(&pubkey);

	isc_buffer_init(&secret, secretdata, sizeof(secretdata));

	randomdata = isc_mem_get(tkeyout->mctx, TKEY_RANDOM_AMOUNT);
	if (randomdata == NULL)
		goto failure;

	result = dst__entropy_getdata(randomdata, TKEY_RANDOM_AMOUNT,
				      ISC_FALSE);
	if (result != ISC_R_SUCCESS) {
		tkey_log("process_dhtkey: failed to obtain entropy: %s",
			 isc_result_totext(result));
		goto failure;
	}

	r.base = randomdata;
	r.length = TKEY_RANDOM_AMOUNT;
	r2.base = tkeyin->key;
	r2.length = tkeyin->keylen;
	RETERR(compute_secret(shared, &r2, &r, &secret));
	isc_buffer_free(&shared);

	RETERR(dns_tsigkey_create(name, &tkeyin->algorithm,
				  isc_buffer_base(&secret),
				  isc_buffer_usedlength(&secret),
				  ISC_TRUE, signer, tkeyin->inception,
				  tkeyin->expire, ring->mctx, ring, NULL));

	/* This key is good for a long time */
	tkeyout->inception = tkeyin->inception;
	tkeyout->expire = tkeyin->expire;

	tkeyout->key = randomdata;
	tkeyout->keylen = TKEY_RANDOM_AMOUNT;

	return (ISC_R_SUCCESS);

 failure:
	if (!ISC_LIST_EMPTY(*namelist))
		free_namelist(msg, namelist);
	if (shared != NULL)
		isc_buffer_free(&shared);
	if (pubkey != NULL)
		dst_key_free(&pubkey);
	if (randomdata != NULL)
		isc_mem_put(tkeyout->mctx, randomdata, TKEY_RANDOM_AMOUNT);
	return (result);
}
Exemplo n.º 14
0
isc_result_t
dns_nsec3_buildrdata(dns_db_t *db, dns_dbversion_t *version,
		     dns_dbnode_t *node, unsigned int hashalg,
		     unsigned int flags, unsigned int iterations,
		     const unsigned char *salt, size_t salt_length,
		     const unsigned char *nexthash, size_t hash_length,
		     unsigned char *buffer, dns_rdata_t *rdata)
{
	isc_result_t result;
	dns_rdataset_t rdataset;
	isc_region_t r;
	unsigned int i, window;
	int octet;
	isc_boolean_t found;
	isc_boolean_t found_ns;
	isc_boolean_t need_rrsig;

	unsigned char *nsec_bits, *bm;
	unsigned int max_type;
	dns_rdatasetiter_t *rdsiter;
	unsigned char *p;

	REQUIRE(salt_length < 256U);
	REQUIRE(hash_length < 256U);
	REQUIRE(flags <= 0xffU);
	REQUIRE(hashalg <= 0xffU);
	REQUIRE(iterations <= 0xffffU);

	switch (hashalg) {
	case dns_hash_sha1:
		REQUIRE(hash_length == ISC_SHA1_DIGESTLENGTH);
		break;
	}

	memset(buffer, 0, DNS_NSEC3_BUFFERSIZE);

	p = buffer;

	*p++ = hashalg;
	*p++ = flags;

	*p++ = iterations >> 8;
	*p++ = iterations;

	*p++ = salt_length;
	memcpy(p, salt, salt_length);
	p += salt_length;

	*p++ = hash_length;
	memcpy(p, nexthash, hash_length);
	p += hash_length;

	r.length = p - buffer;
	r.base = buffer;

	/*
	 * Use the end of the space for a raw bitmap leaving enough
	 * space for the window identifiers and length octets.
	 */
	bm = r.base + r.length + 512;
	nsec_bits = r.base + r.length;
	max_type = 0;
	if (node == NULL)
		goto collapse_bitmap;
	dns_rdataset_init(&rdataset);
	rdsiter = NULL;
	result = dns_db_allrdatasets(db, node, version, 0, &rdsiter);
	if (result != ISC_R_SUCCESS)
		return (result);
	found = found_ns = need_rrsig = ISC_FALSE;
	for (result = dns_rdatasetiter_first(rdsiter);
	     result == ISC_R_SUCCESS;
	     result = dns_rdatasetiter_next(rdsiter))
	{
		dns_rdatasetiter_current(rdsiter, &rdataset);
		if (rdataset.type != dns_rdatatype_nsec &&
		    rdataset.type != dns_rdatatype_nsec3 &&
		    rdataset.type != dns_rdatatype_rrsig) {
			if (rdataset.type > max_type)
				max_type = rdataset.type;
			set_bit(bm, rdataset.type, 1);
			/*
			 * Work out if we need to set the RRSIG bit for
			 * this node.  We set the RRSIG bit if either of
			 * the following conditions are met:
			 * 1) We have a SOA or DS then we need to set
			 *    the RRSIG bit as both always will be signed.
			 * 2) We set the RRSIG bit if we don't have
			 *    a NS record but do have other data.
			 */
			if (rdataset.type == dns_rdatatype_soa ||
			    rdataset.type == dns_rdatatype_ds)
				need_rrsig = ISC_TRUE;
			else if (rdataset.type == dns_rdatatype_ns)
				found_ns = ISC_TRUE;
			else
				found = ISC_TRUE;
		}
		dns_rdataset_disassociate(&rdataset);
	}
	if ((found && !found_ns) || need_rrsig) {
		if (dns_rdatatype_rrsig > max_type)
			max_type = dns_rdatatype_rrsig;
		set_bit(bm, dns_rdatatype_rrsig, 1);
	}

	/*
	 * At zone cuts, deny the existence of glue in the parent zone.
	 */
	if (bit_isset(bm, dns_rdatatype_ns) &&
	    ! bit_isset(bm, dns_rdatatype_soa)) {
		for (i = 0; i <= max_type; i++) {
			if (bit_isset(bm, i) &&
			    ! dns_rdatatype_iszonecutauth((dns_rdatatype_t)i))
				set_bit(bm, i, 0);
		}
	}

	dns_rdatasetiter_destroy(&rdsiter);
	if (result != ISC_R_NOMORE)
		return (result);

 collapse_bitmap:
	for (window = 0; window < 256; window++) {
		if (window * 256 > max_type)
			break;
		for (octet = 31; octet >= 0; octet--)
			if (bm[window * 32 + octet] != 0)
				break;
		if (octet < 0)
			continue;
		nsec_bits[0] = window;
		nsec_bits[1] = octet + 1;
		/*
		 * Note: potentially overlapping move.
		 */
		memmove(&nsec_bits[2], &bm[window * 32], octet + 1);
		nsec_bits += 3 + octet;
	}
	r.length = nsec_bits - r.base;
	INSIST(r.length <= DNS_NSEC3_BUFFERSIZE);
	dns_rdata_fromregion(rdata, dns_db_class(db), dns_rdatatype_nsec3, &r);

	return (ISC_R_SUCCESS);
}
Exemplo n.º 15
0
/*
 * we asked for, and got a CNAME of some kind.
 */
static void process_step_cname(dnskey_glob *gs,
			       dnskey_lookup *dl,
			       struct rrsetinfo *ans,
			       int success)
{
	struct rdatainfo *ri;
	isc_region_t  region;
	dns_rdata_t   rd;
	dns_rdata_cname_t cn;
	char simplebuf[80];
	isc_buffer_t *cname_text;
	char cname_buf[DNS_NAME_MAXTEXT];
	/* char cname_buf2[DNS_NAME_MAXTEXT]; */

	switch(success) {
	case ERRSET_NONAME:
	case ERRSET_NODATA:
		/* no, no CNAME found, thing isn't there */
		snprintf(simplebuf, sizeof(simplebuf),
			 "RR of type %s for %s was not found (tried CNAMEs)",
			 dl->wantedtype_name,
			 dl->fqdn);
		output_transaction_line(gs, dl->tracking_id, 0, "RETRY", 
					simplebuf);
		dl->step = dkl_done;
		return;
		
	case 0:
		/* aha! found a CNAME */
		break;

	default:
	fatal:
		/* some other error */
		snprintf(simplebuf, sizeof(simplebuf), "err=%d", success);
		output_transaction_line(gs, dl->tracking_id, 0, "FATAL", simplebuf);
		dl->step = dkl_done;
		return;
	}

	/*
	 * now process out the CNAMEs, and look them up, one by one...
	 * there should be only one... We just use the first one that works.
	 */

	if(ans->rri_flags & RRSET_VALIDATED) {
		output_transaction_line(gs, dl->tracking_id, 0, "DNSSEC", "OKAY");
	} else {
		output_transaction_line(gs, dl->tracking_id, 0, "DNSSEC", "not present");
	}

	if(ans->rri_nrdatas != 1) {
		/* we got a number of CNAMEs different from 1! */
		success=0;
		snprintf(simplebuf, sizeof(simplebuf), "illegal number of CNAMES: %d", ans->rri_nrdatas);
		output_transaction_line(gs, dl->tracking_id, 0, "FATAL", simplebuf);
		dl->step = dkl_done;
		return;
	}

	/* process first CNAME record */
	ri= &ans->rri_rdatas[0];

	memset(&region, 0, sizeof(region));
	memset(&rd,     0, sizeof(rd));
	
	region.base   =  ri->rdi_data;
	region.length =  ri->rdi_length;

	dns_rdata_fromregion(&rd, dns_rdataclass_in,
			     dns_rdatatype_cname, &region);
	
	/* we set mctx to NULL, which means that the tenure for
	 * the stuff pointed to by cn will persist only as long
	 * as rd persists.
	 */
	if(dns_rdata_tostruct(&rd, &cn, NULL) != ISC_R_SUCCESS) {
		/* failed, try next return error */
		success=0;
		goto fatal;
	}

	cname_text=NULL;
	if(isc_buffer_allocate(gs->iscmem, &cname_text, DNS_NAME_MAXTEXT)) {
		success=0;
		goto fatal;
	}

	if(dns_name_totext(&cn.cname, ISC_TRUE, cname_text) !=
	   ISC_R_SUCCESS) {
		success=0;
		goto fatal;
	}
	
	cname_buf[0]='\0';
	strncat(cname_buf,
		isc_buffer_base(cname_text),
		isc_buffer_usedlength(cname_text));

	/* free up buffer */
	isc_buffer_free(&cname_text);
	
	{
		/* add a trailing . */
		char *end;
		end = &cname_buf[strlen(cname_buf)];
		if(*end != '.') {
			strncat(cname_buf, ".", sizeof(cname_buf));
		}
	}
	
	/* format out a text version */
	output_transaction_line(gs, dl->tracking_id, 0, "CNAME", cname_buf);
	output_transaction_line(gs, dl->tracking_id, 0, "CNAMEFROM", dl->fqdn);
	
	/* check for loops in the CNAMEs! */
	if(dns_name_equal(&dl->last_cname, &cn.cname) == ISC_TRUE) {
		/* damn, we found a loop! */
		dl->step = dkl_done;
		return;
	}

	/* send new request. */
	/* okay, so look this new thing up */		
	success = lwres_getrrsetbyname_init(cname_buf, dns_rdataclass_in,
					    dl->wantedtype, 0 /*flags*/,
					    gs->lwctx, &dl->las);

	if(success != ERRSET_SUCCESS) {
		return;
	}

	lwres_getrrsetbyname_xmit(gs->lwctx, &dl->las);

	dl->step = dkl_second;
}
Exemplo n.º 16
0
void
dns_ncache_current(dns_rdataset_t *ncacherdataset, dns_name_t *found,
		   dns_rdataset_t *rdataset)
{
	dns_rdata_t rdata = DNS_RDATA_INIT;
	dns_trust_t trust;
	isc_region_t remaining, sigregion;
	isc_buffer_t source;
	dns_name_t tname;
	dns_rdatatype_t type;
	unsigned int count;
	dns_rdata_rrsig_t rrsig;
	unsigned char *raw;

	REQUIRE(ncacherdataset != NULL);
	REQUIRE(ncacherdataset->type == 0);
	REQUIRE((ncacherdataset->attributes & DNS_RDATASETATTR_NEGATIVE) != 0);
	REQUIRE(found != NULL);
	REQUIRE(!dns_rdataset_isassociated(rdataset));

	dns_rdataset_current(ncacherdataset, &rdata);
	isc_buffer_init(&source, rdata.data, rdata.length);
	isc_buffer_add(&source, rdata.length);

	dns_name_init(&tname, NULL);
	isc_buffer_remainingregion(&source, &remaining);
	dns_name_fromregion(found, &remaining);
	INSIST(remaining.length >= found->length);
	isc_buffer_forward(&source, found->length);
	remaining.length -= found->length;

	INSIST(remaining.length >= 5);
	type = isc_buffer_getuint16(&source);
	trust = isc_buffer_getuint8(&source);
	INSIST(trust <= dns_trust_ultimate);
	isc_buffer_remainingregion(&source, &remaining);

	rdataset->methods = &rdataset_methods;
	rdataset->rdclass = ncacherdataset->rdclass;
	rdataset->type = type;
	if (type == dns_rdatatype_rrsig) {
		/*
		 * Extract covers from RRSIG.
		 */
		raw = remaining.base;
		count = raw[0] * 256 + raw[1];
		INSIST(count > 0);
		raw += 2;
		sigregion.length = raw[0] * 256 + raw[1];
		raw += 2;
		sigregion.base = raw;
		dns_rdata_reset(&rdata);
		dns_rdata_fromregion(&rdata, rdataset->rdclass,
				     rdataset->type, &sigregion);
		(void)dns_rdata_tostruct(&rdata, &rrsig, NULL);
		rdataset->covers = rrsig.covered;
	} else
		rdataset->covers = 0;
	rdataset->ttl = ncacherdataset->ttl;
	rdataset->trust = trust;
	rdataset->private1 = NULL;
	rdataset->private2 = NULL;

	rdataset->private3 = remaining.base;

	/*
	 * Reset iterator state.
	 */
	rdataset->privateuint4 = 0;
	rdataset->private5 = NULL;
	rdataset->private6 = NULL;
}
Exemplo n.º 17
0
static void process_step_first(dnskey_glob *gs,
			       dnskey_lookup *dl,
			       struct rrsetinfo *ans,
			       int success,
			       int attempt)  /* attempt = 0 first time, 1 after cname */
{
	char simplebuf[132], typebuf[16];
	char txtbuf[1024];
	unsigned int i;

	switch(success) {
	case ERRSET_NODATA:
		if(attempt == 0) {
			lwresd_has_spoken = 1;
			setup_follow_possible_cname(gs, dl);
			dl->step = dkl_cname;
			return;
		} 
		/* FALLTHROUGH */
	case ERRSET_NONAME:
		lwresd_has_spoken = 1;
		snprintf(simplebuf, sizeof(simplebuf),
			 "RR of type %s for %s was not found",
			 dl->wantedtype_name,
			 dl->fqdn);
		output_transaction_line(gs, dl->tracking_id, 0, "RETRY", 
					simplebuf);
		dl->step = dkl_done;
		goto done;
		
	case ERRSET_NOMEMORY:
		snprintf(simplebuf, sizeof(simplebuf),
			 "ran out of memory while looking up RR of type %s for %s",
			 dl->wantedtype_name, dl->fqdn);
		output_transaction_line(gs, dl->tracking_id, 0, "FATAL", simplebuf);
		dl->step = dkl_done;
		goto done;

	case ERRSET_FAIL:
		snprintf(simplebuf, sizeof(simplebuf),
			 "unspecified failure while looking up RR of type %s for %s%s",
			 dl->wantedtype_name, dl->fqdn,
			 lwresd_has_spoken ? "" : " (is lwresd running?)");
		output_transaction_line(gs, dl->tracking_id, 0, "FATAL", simplebuf);
		dl->step = dkl_done;
		goto done;
		
	case ERRSET_INVAL:
		snprintf(simplebuf, sizeof(simplebuf),
			 "invalid input while looking up RR of type %s for %s",
			 dl->wantedtype_name, dl->fqdn);
		output_transaction_line(gs, dl->tracking_id, 0, "RETRY", simplebuf);
		dl->step = dkl_done;
		goto done;

	default:
		snprintf(simplebuf, sizeof(simplebuf), " unknown error %d", success);
		output_transaction_line(gs, dl->tracking_id, 0, "RETRY", simplebuf);
		dl->step = dkl_done;
	done:
		return;
		
	case 0:
		/* everything okay */
		lwresd_has_spoken = 1;
		dl->step = dkl_done;
		break;
	}

	/* output the rest of the data */

	if(ans->rri_flags & RRSET_VALIDATED) {
		output_transaction_line(gs, dl->tracking_id, 0, "DNSSEC", "OKAY");
		snprintf(typebuf, sizeof(typebuf), "AD-%s", dl->wantedtype_name);
		if(dl->wantedtype_name) free(dl->wantedtype_name);
		dl->wantedtype_name=xstrdup(typebuf);
	} else {
		output_transaction_line(gs, dl->tracking_id, 0, "DNSSEC", "not present");
	}

	output_transaction_line(gs, dl->tracking_id, 0, "NAME", ans->rri_name);

	for(i=0; i<ans->rri_nrdatas; i++) {
		struct rdatainfo *ri = &ans->rri_rdatas[i];
		isc_region_t  region;
		dns_rdata_t    rd;

		isc_buffer_clear(gs->iscbuf);
		memset(&region, 0, sizeof(region));
		memset(&rd,     0, sizeof(rd));
		
		region.base   =  ri->rdi_data;
		region.length =  ri->rdi_length;

		if(dl->wantedtype == dns_rdatatype_txt) {
			/* special treatment for TXT records */
			unsigned int len, rdatalen, totlen;
			unsigned char *txtp, *rdata;

			txtp     = txtbuf;
			totlen   = 0;
			rdatalen = ri->rdi_length;
			rdata    = ri->rdi_data;

			while(rdatalen > 0) {
				len= (unsigned)rdata[0];
				memcpy(txtp, rdata+1, len);
				totlen   += len;
				txtp     += len;
				rdata    += len+1;
				rdatalen -= len+1;
			}
			*txtp = '\0';

			output_transaction_line_limited(gs, dl->tracking_id, 0,
							dl->wantedtype_name,
							totlen, txtbuf);

		} else {
			dns_rdata_fromregion(&rd, dns_rdataclass_in,
					     dl->wantedtype, &region);
			
			if(dns_rdata_totext(&rd, NULL, gs->iscbuf) != ISC_R_SUCCESS) {

			}
			
			output_transaction_line_limited(gs, dl->tracking_id, 0,
							dl->wantedtype_name,
					(int)isc_buffer_usedlength(gs->iscbuf),
					(char *)isc_buffer_base(gs->iscbuf));
		}
	}
		
	for(i=0; i<ans->rri_nsigs; i++) {
		struct rdatainfo *ri = &ans->rri_sigs[i];
		isc_region_t  region;
		dns_rdata_t    rd;

		isc_buffer_clear(gs->iscbuf);
		memset(&region, 0, sizeof(region));
		memset(&rd,     0, sizeof(rd));
		
		region.base   =  ri->rdi_data;
		region.length =  ri->rdi_length;

		dns_rdata_fromregion(&rd, dns_rdataclass_in,
				     dns_rdatatype_sig, &region);
		if(dns_rdata_totext(&rd, NULL, gs->iscbuf) != ISC_R_SUCCESS) {
			output_transaction_line(gs, dl->tracking_id, 0, "FATAL", "isc totext error");
			return;
		}
		
		output_transaction_line_limited(gs, dl->tracking_id, 0, "SIG",
					(int)isc_buffer_usedlength(gs->iscbuf),
					(char *)isc_buffer_base(gs->iscbuf));
	}
}	
Exemplo n.º 18
0
/*%
 * Configure an apex NS with glues for a static-stub zone.
 * For example, for the zone named "example.com", the following RRs will be
 * added to the zone DB:
 * example.com. NS example.com.
 * example.com. A 192.0.2.1
 * example.com. AAAA 2001:db8::1
 */
static isc_result_t
configure_staticstub_serveraddrs(const cfg_obj_t *zconfig, dns_zone_t *zone,
				 dns_rdatalist_t *rdatalist_ns,
				 dns_rdatalist_t *rdatalist_a,
				 dns_rdatalist_t *rdatalist_aaaa)
{
	const cfg_listelt_t *element;
	isc_mem_t *mctx = dns_zone_getmctx(zone);
	isc_region_t region, sregion;
	dns_rdata_t *rdata;
	isc_result_t result = ISC_R_SUCCESS;

	for (element = cfg_list_first(zconfig);
	     element != NULL;
	     element = cfg_list_next(element))
	{
		const isc_sockaddr_t* sa;
		isc_netaddr_t na;
		const cfg_obj_t *address = cfg_listelt_value(element);
		dns_rdatalist_t *rdatalist;

		sa = cfg_obj_assockaddr(address);
		if (isc_sockaddr_getport(sa) != 0) {
			cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
				    "port is not configurable for "
				    "static stub server-addresses");
			return (ISC_R_FAILURE);
		}
		isc_netaddr_fromsockaddr(&na, sa);
		if (isc_netaddr_getzone(&na) != 0) {
			cfg_obj_log(zconfig, ns_g_lctx, ISC_LOG_ERROR,
					    "scoped address is not allowed "
					    "for static stub "
					    "server-addresses");
			return (ISC_R_FAILURE);
		}

		switch (na.family) {
		case AF_INET:
			region.length = sizeof(na.type.in);
			rdatalist = rdatalist_a;
			break;
		default:
			INSIST(na.family == AF_INET6);
			region.length = sizeof(na.type.in6);
			rdatalist = rdatalist_aaaa;
			break;
		}

		rdata = isc_mem_get(mctx, sizeof(*rdata) + region.length);
		if (rdata == NULL)
			return (ISC_R_NOMEMORY);
		region.base = (unsigned char *)(rdata + 1);
		memcpy(region.base, &na.type, region.length);
		dns_rdata_init(rdata);
		dns_rdata_fromregion(rdata, dns_zone_getclass(zone),
				     rdatalist->type, &region);
		ISC_LIST_APPEND(rdatalist->rdata, rdata, link);
	}

	/*
	 * If no address is specified (unlikely in this context, but possible),
	 * there's nothing to do anymore.
	 */
	if (ISC_LIST_EMPTY(rdatalist_a->rdata) &&
	    ISC_LIST_EMPTY(rdatalist_aaaa->rdata)) {
		return (ISC_R_SUCCESS);
	}

	/* Add to the list an apex NS with the ns name being the origin name */
	dns_name_toregion(dns_zone_getorigin(zone), &sregion);
	rdata = isc_mem_get(mctx, sizeof(*rdata) + sregion.length);
	if (rdata == NULL) {
		/*
		 * Already allocated data will be freed in the caller, so
		 * we can simply return here.
		 */
		return (ISC_R_NOMEMORY);
	}
	region.length = sregion.length;
	region.base = (unsigned char *)(rdata + 1);
	memcpy(region.base, sregion.base, region.length);
	dns_rdata_init(rdata);
	dns_rdata_fromregion(rdata, dns_zone_getclass(zone),
			     dns_rdatatype_ns, &region);
	ISC_LIST_APPEND(rdatalist_ns->rdata, rdata, link);

	return (result);
}
Exemplo n.º 19
0
isc_result_t
dns_ncache_getsigrdataset(dns_rdataset_t *ncacherdataset, dns_name_t *name,
			  dns_rdatatype_t covers, dns_rdataset_t *rdataset)
{
	dns_name_t tname;
	dns_rdata_rrsig_t rrsig;
	dns_rdata_t rdata = DNS_RDATA_INIT;
	dns_rdataset_t clone;
	dns_rdatatype_t type;
	dns_trust_t trust = dns_trust_none;
	isc_buffer_t source;
	isc_region_t remaining, sigregion;
	isc_result_t result;
	unsigned char *raw;
	unsigned int count;

	REQUIRE(ncacherdataset != NULL);
	REQUIRE(ncacherdataset->type == 0);
	REQUIRE((ncacherdataset->attributes & DNS_RDATASETATTR_NEGATIVE) != 0);
	REQUIRE(name != NULL);
	REQUIRE(!dns_rdataset_isassociated(rdataset));

	dns_rdataset_init(&clone);
	dns_rdataset_clone(ncacherdataset, &clone);
	result = dns_rdataset_first(&clone);
	while (result == ISC_R_SUCCESS) {
		dns_rdataset_current(&clone, &rdata);
		isc_buffer_init(&source, rdata.data, rdata.length);
		isc_buffer_add(&source, rdata.length);
		dns_name_init(&tname, NULL);
		isc_buffer_remainingregion(&source, &remaining);
		dns_name_fromregion(&tname, &remaining);
		INSIST(remaining.length >= tname.length);
		isc_buffer_forward(&source, tname.length);
		isc_region_consume(&remaining, tname.length);

		INSIST(remaining.length >= 2);
		type = isc_buffer_getuint16(&source);
		isc_region_consume(&remaining, 2);

		if (type != dns_rdatatype_rrsig ||
		    !dns_name_equal(&tname, name)) {
			result = dns_rdataset_next(&clone);
			dns_rdata_reset(&rdata);
			continue;
		}

		INSIST(remaining.length >= 1);
		trust = isc_buffer_getuint8(&source);
		INSIST(trust <= dns_trust_ultimate);
		isc_region_consume(&remaining, 1);

		raw = remaining.base;
		count = raw[0] * 256 + raw[1];
		INSIST(count > 0);
		raw += 2;
		sigregion.length = raw[0] * 256 + raw[1];
		raw += 2;
		sigregion.base = raw;
		dns_rdata_reset(&rdata);
		dns_rdata_fromregion(&rdata, rdataset->rdclass,
				     dns_rdatatype_rrsig, &sigregion);
		(void)dns_rdata_tostruct(&rdata, &rrsig, NULL);
		if (rrsig.covered == covers) {
			isc_buffer_remainingregion(&source, &remaining);
			break;
		}

		result = dns_rdataset_next(&clone);
		dns_rdata_reset(&rdata);
	}
	dns_rdataset_disassociate(&clone);
	if (result == ISC_R_NOMORE)
		return (ISC_R_NOTFOUND);
	if (result != ISC_R_SUCCESS)
		return (result);

	INSIST(remaining.length != 0);

	rdataset->methods = &rdataset_methods;
	rdataset->rdclass = ncacherdataset->rdclass;
	rdataset->type = dns_rdatatype_rrsig;
	rdataset->covers = covers;
	rdataset->ttl = ncacherdataset->ttl;
	rdataset->trust = trust;
	rdataset->private1 = NULL;
	rdataset->private2 = NULL;

	rdataset->private3 = remaining.base;

	/*
	 * Reset iterator state.
	 */
	rdataset->privateuint4 = 0;
	rdataset->private5 = NULL;
	rdataset->private6 = NULL;
	return (ISC_R_SUCCESS);
}
Exemplo n.º 20
0
isc_result_t
dns_nsec_buildrdata(dns_db_t *db, dns_dbversion_t *version,
		    dns_dbnode_t *node, dns_name_t *target,
		    unsigned char *buffer, dns_rdata_t *rdata)
{
	isc_result_t result;
	dns_rdataset_t rdataset;
	isc_region_t r;
	unsigned int i, window;
	int octet;

	unsigned char *nsec_bits, *bm;
	unsigned int max_type;
	dns_rdatasetiter_t *rdsiter;

	memset(buffer, 0, DNS_NSEC_BUFFERSIZE);
	dns_name_toregion(target, &r);
	memcpy(buffer, r.base, r.length);
	r.base = buffer;
	/*
	 * Use the end of the space for a raw bitmap leaving enough
	 * space for the window identifiers and length octets.
	 */
	bm = r.base + r.length + 512;
	nsec_bits = r.base + r.length;
	set_bit(bm, dns_rdatatype_rrsig, 1);
	set_bit(bm, dns_rdatatype_nsec, 1);
	max_type = dns_rdatatype_nsec;
	dns_rdataset_init(&rdataset);
	rdsiter = NULL;
	result = dns_db_allrdatasets(db, node, version, 0, &rdsiter);
	if (result != ISC_R_SUCCESS)
		return (result);
	for (result = dns_rdatasetiter_first(rdsiter);
	     result == ISC_R_SUCCESS;
	     result = dns_rdatasetiter_next(rdsiter))
	{
		dns_rdatasetiter_current(rdsiter, &rdataset);
		if (rdataset.type != dns_rdatatype_nsec &&
		    rdataset.type != dns_rdatatype_nsec3 &&
		    rdataset.type != dns_rdatatype_rrsig) {
			if (rdataset.type > max_type)
				max_type = rdataset.type;
			set_bit(bm, rdataset.type, 1);
		}
		dns_rdataset_disassociate(&rdataset);
	}

	/*
	 * At zone cuts, deny the existence of glue in the parent zone.
	 */
	if (bit_isset(bm, dns_rdatatype_ns) &&
	    ! bit_isset(bm, dns_rdatatype_soa)) {
		for (i = 0; i <= max_type; i++) {
			if (bit_isset(bm, i) &&
			    ! dns_rdatatype_iszonecutauth((dns_rdatatype_t)i))
				set_bit(bm, i, 0);
		}
	}

	dns_rdatasetiter_destroy(&rdsiter);
	if (result != ISC_R_NOMORE)
		return (result);

	for (window = 0; window < 256; window++) {
		if (window * 256 > max_type)
			break;
		for (octet = 31; octet >= 0; octet--)
			if (bm[window * 32 + octet] != 0)
				break;
		if (octet < 0)
			continue;
		nsec_bits[0] = window;
		nsec_bits[1] = octet + 1;
		/*
		 * Note: potential overlapping move.
		 */
		memmove(&nsec_bits[2], &bm[window * 32], octet + 1);
		nsec_bits += 3 + octet;
	}
	r.length = nsec_bits - r.base;
	INSIST(r.length <= DNS_NSEC_BUFFERSIZE);
	dns_rdata_fromregion(rdata,
			     dns_db_class(db),
			     dns_rdatatype_nsec,
			     &r);

	return (ISC_R_SUCCESS);
}
Exemplo n.º 21
0
/*
 * Arrange to send as much as we can of "stream" without blocking.
 *
 * Requires:
 *	The stream iterator is initialized and points at an RR,
 *      or possibly at the end of the stream (that is, the
 *      _first method of the iterator has been called).
 */
static void
sendstream(xfrout_ctx_t *xfr) {
	dns_message_t *tcpmsg = NULL;
	dns_message_t *msg = NULL; /* Client message if UDP, tcpmsg if TCP */
	isc_result_t result;
	isc_region_t used;
	isc_region_t region;
	dns_rdataset_t *qrdataset;
	dns_name_t *msgname = NULL;
	dns_rdata_t *msgrdata = NULL;
	dns_rdatalist_t *msgrdl = NULL;
	dns_rdataset_t *msgrds = NULL;
	dns_compress_t cctx;
	isc_boolean_t cleanup_cctx = ISC_FALSE;
	isc_boolean_t is_tcp;

	int n_rrs;

	isc_buffer_clear(&xfr->buf);
	isc_buffer_clear(&xfr->txlenbuf);
	isc_buffer_clear(&xfr->txbuf);

	is_tcp = ISC_TF((xfr->client->attributes & NS_CLIENTATTR_TCP) != 0);
	if (!is_tcp) {
		/*
		 * In the UDP case, we put the response data directly into
		 * the client message.
		 */
		msg = xfr->client->message;
		CHECK(dns_message_reply(msg, ISC_TRUE));
	} else {
		/*
		 * TCP. Build a response dns_message_t, temporarily storing
		 * the raw, uncompressed owner names and RR data contiguously
		 * in xfr->buf.  We know that if the uncompressed data fits
		 * in xfr->buf, the compressed data will surely fit in a TCP
		 * message.
		 */

		CHECK(dns_message_create(xfr->mctx,
					 DNS_MESSAGE_INTENTRENDER, &tcpmsg));
		msg = tcpmsg;

		msg->id = xfr->id;
		msg->rcode = dns_rcode_noerror;
		msg->flags = DNS_MESSAGEFLAG_QR | DNS_MESSAGEFLAG_AA;
		if ((xfr->client->attributes & NS_CLIENTATTR_RA) != 0)
			msg->flags |= DNS_MESSAGEFLAG_RA;
		CHECK(dns_message_settsigkey(msg, xfr->tsigkey));
		CHECK(dns_message_setquerytsig(msg, xfr->lasttsig));
		if (xfr->lasttsig != NULL)
			isc_buffer_free(&xfr->lasttsig);

		/*
		 * Add a EDNS option to the message?
		 */
		if ((xfr->client->attributes & NS_CLIENTATTR_WANTOPT) != 0) {
			dns_rdataset_t *opt = NULL;

			CHECK(ns_client_addopt(xfr->client, msg, &opt));
			CHECK(dns_message_setopt(msg, opt));
			/*
			 * Add to first message only.
			 */
			xfr->client->attributes &= ~NS_CLIENTATTR_WANTNSID;
			xfr->client->attributes &= ~NS_CLIENTATTR_HAVEEXPIRE;
		}

		/*
		 * Account for reserved space.
		 */
		if (xfr->tsigkey != NULL)
			INSIST(msg->reserved != 0U);
		isc_buffer_add(&xfr->buf, msg->reserved);

		/*
		 * Include a question section in the first message only.
		 * BIND 8.2.1 will not recognize an IXFR if it does not
		 * have a question section.
		 */
		if (xfr->nmsg == 0) {
			dns_name_t *qname = NULL;
			isc_region_t r;

			/*
			 * Reserve space for the 12-byte message header
			 * and 4 bytes of question.
			 */
			isc_buffer_add(&xfr->buf, 12 + 4);

			qrdataset = NULL;
			result = dns_message_gettemprdataset(msg, &qrdataset);
			if (result != ISC_R_SUCCESS)
				goto failure;
			dns_rdataset_makequestion(qrdataset,
					xfr->client->message->rdclass,
					xfr->qtype);

			result = dns_message_gettempname(msg, &qname);
			if (result != ISC_R_SUCCESS)
				goto failure;
			dns_name_init(qname, NULL);
			isc_buffer_availableregion(&xfr->buf, &r);
			INSIST(r.length >= xfr->qname->length);
			r.length = xfr->qname->length;
			isc_buffer_putmem(&xfr->buf, xfr->qname->ndata,
					  xfr->qname->length);
			dns_name_fromregion(qname, &r);
			ISC_LIST_INIT(qname->list);
			ISC_LIST_APPEND(qname->list, qrdataset, link);

			dns_message_addname(msg, qname, DNS_SECTION_QUESTION);
		} else {
			/*
			 * Reserve space for the 12-byte message header
			 */
			isc_buffer_add(&xfr->buf, 12);
			msg->tcp_continuation = 1;
		}
	}

	/*
	 * Try to fit in as many RRs as possible, unless "one-answer"
	 * format has been requested.
	 */
	for (n_rrs = 0; ; n_rrs++) {
		dns_name_t *name = NULL;
		isc_uint32_t ttl;
		dns_rdata_t *rdata = NULL;

		unsigned int size;
		isc_region_t r;

		msgname = NULL;
		msgrdata = NULL;
		msgrdl = NULL;
		msgrds = NULL;

		xfr->stream->methods->current(xfr->stream,
					      &name, &ttl, &rdata);
		size = name->length + 10 + rdata->length;
		isc_buffer_availableregion(&xfr->buf, &r);
		if (size >= r.length) {
			/*
			 * RR would not fit.  If there are other RRs in the
			 * buffer, send them now and leave this RR to the
			 * next message.  If this RR overflows the buffer
			 * all by itself, fail.
			 *
			 * In theory some RRs might fit in a TCP message
			 * when compressed even if they do not fit when
			 * uncompressed, but surely we don't want
			 * to send such monstrosities to an unsuspecting
			 * slave.
			 */
			if (n_rrs == 0) {
				xfrout_log(xfr, ISC_LOG_WARNING,
					   "RR too large for zone transfer "
					   "(%d bytes)", size);
				/* XXX DNS_R_RRTOOLARGE? */
				result = ISC_R_NOSPACE;
				goto failure;
			}
			break;
		}

		if (isc_log_wouldlog(ns_g_lctx, XFROUT_RR_LOGLEVEL))
			log_rr(name, rdata, ttl); /* XXX */

		result = dns_message_gettempname(msg, &msgname);
		if (result != ISC_R_SUCCESS)
			goto failure;
		dns_name_init(msgname, NULL);
		isc_buffer_availableregion(&xfr->buf, &r);
		INSIST(r.length >= name->length);
		r.length = name->length;
		isc_buffer_putmem(&xfr->buf, name->ndata, name->length);
		dns_name_fromregion(msgname, &r);

		/* Reserve space for RR header. */
		isc_buffer_add(&xfr->buf, 10);

		result = dns_message_gettemprdata(msg, &msgrdata);
		if (result != ISC_R_SUCCESS)
			goto failure;
		isc_buffer_availableregion(&xfr->buf, &r);
		r.length = rdata->length;
		isc_buffer_putmem(&xfr->buf, rdata->data, rdata->length);
		dns_rdata_init(msgrdata);
		dns_rdata_fromregion(msgrdata,
				     rdata->rdclass, rdata->type, &r);

		result = dns_message_gettemprdatalist(msg, &msgrdl);
		if (result != ISC_R_SUCCESS)
			goto failure;
		msgrdl->type = rdata->type;
		msgrdl->rdclass = rdata->rdclass;
		msgrdl->ttl = ttl;
		if (rdata->type == dns_rdatatype_sig ||
		    rdata->type == dns_rdatatype_rrsig)
			msgrdl->covers = dns_rdata_covers(rdata);
		else
			msgrdl->covers = dns_rdatatype_none;
		ISC_LIST_APPEND(msgrdl->rdata, msgrdata, link);

		result = dns_message_gettemprdataset(msg, &msgrds);
		if (result != ISC_R_SUCCESS)
			goto failure;
		result = dns_rdatalist_tordataset(msgrdl, msgrds);
		INSIST(result == ISC_R_SUCCESS);

		ISC_LIST_APPEND(msgname->list, msgrds, link);

		dns_message_addname(msg, msgname, DNS_SECTION_ANSWER);
		msgname = NULL;

		result = xfr->stream->methods->next(xfr->stream);
		if (result == ISC_R_NOMORE) {
			xfr->end_of_stream = ISC_TRUE;
			break;
		}
		CHECK(result);

		if (! xfr->many_answers)
			break;
		/*
		 * At this stage, at least 1 RR has been rendered into
		 * the message. Check if we want to clamp this message
		 * here (TCP only). 20480 was set as an upper limit to
		 * improve message compression.
		 */
		if ((isc_buffer_usedlength(&xfr->buf) >= 20480) && is_tcp)
			break;
	}

	if (is_tcp) {
		CHECK(dns_compress_init(&cctx, -1, xfr->mctx));
		dns_compress_setsensitive(&cctx, ISC_TRUE);
		cleanup_cctx = ISC_TRUE;
		CHECK(dns_message_renderbegin(msg, &cctx, &xfr->txbuf));
		CHECK(dns_message_rendersection(msg, DNS_SECTION_QUESTION, 0));
		CHECK(dns_message_rendersection(msg, DNS_SECTION_ANSWER, 0));
		CHECK(dns_message_renderend(msg));
		dns_compress_invalidate(&cctx);
		cleanup_cctx = ISC_FALSE;

		isc_buffer_usedregion(&xfr->txbuf, &used);
		isc_buffer_putuint16(&xfr->txlenbuf,
				     (isc_uint16_t)used.length);
		region.base = xfr->txlenbuf.base;
		region.length = 2 + used.length;
		xfrout_log(xfr, ISC_LOG_DEBUG(8),
			   "sending TCP message of %d bytes",
			   used.length);
		CHECK(isc_socket_send(xfr->client->tcpsocket, /* XXX */
				      &region, xfr->client->task,
				      xfrout_senddone,
				      xfr));
		xfr->sends++;
	} else {
		xfrout_log(xfr, ISC_LOG_DEBUG(8), "sending IXFR UDP response");
		ns_client_send(xfr->client);
		xfr->stream->methods->pause(xfr->stream);
		xfrout_ctx_destroy(&xfr);
		return;
	}

	/* Advance lasttsig to be the last TSIG generated */
	CHECK(dns_message_getquerytsig(msg, xfr->mctx, &xfr->lasttsig));

	xfr->nmsg++;

 failure:
	if (msgname != NULL) {
		if (msgrds != NULL) {
			if (dns_rdataset_isassociated(msgrds))
				dns_rdataset_disassociate(msgrds);
			dns_message_puttemprdataset(msg, &msgrds);
		}
		if (msgrdl != NULL) {
			ISC_LIST_UNLINK(msgrdl->rdata, msgrdata, link);
			dns_message_puttemprdatalist(msg, &msgrdl);
		}
		if (msgrdata != NULL)
			dns_message_puttemprdata(msg, &msgrdata);
		dns_message_puttempname(msg, &msgname);
	}

	if (tcpmsg != NULL)
		dns_message_destroy(&tcpmsg);

	if (cleanup_cctx)
		dns_compress_invalidate(&cctx);
	/*
	 * Make sure to release any locks held by database
	 * iterators before returning from the event handler.
	 */
	xfr->stream->methods->pause(xfr->stream);

	if (result == ISC_R_SUCCESS)
		return;

	xfrout_fail(xfr, result, "sending zone data");
}
Exemplo n.º 22
0
/*%
 * Writes a public key to disk in DNS format.
 */
static isc_result_t
write_public_key(const dst_key_t *key, int type, const char *directory) {
	FILE *fp;
	isc_buffer_t keyb, textb, fileb, classb;
	isc_region_t r;
	char filename[ISC_DIR_NAMEMAX];
	unsigned char key_array[DST_KEY_MAXSIZE];
	char text_array[DST_KEY_MAXTEXTSIZE];
	char class_array[10];
	isc_result_t ret;
	dns_rdata_t rdata = DNS_RDATA_INIT;
	isc_fsaccess_t access;

	REQUIRE(VALID_KEY(key));

	isc_buffer_init(&keyb, key_array, sizeof(key_array));
	isc_buffer_init(&textb, text_array, sizeof(text_array));
	isc_buffer_init(&classb, class_array, sizeof(class_array));

	ret = dst_key_todns(key, &keyb);
	if (ret != ISC_R_SUCCESS)
		return (ret);

	isc_buffer_usedregion(&keyb, &r);
	dns_rdata_fromregion(&rdata, key->key_class, dns_rdatatype_dnskey, &r);

	ret = dns_rdata_totext(&rdata, (dns_name_t *) NULL, &textb);
	if (ret != ISC_R_SUCCESS)
		return (DST_R_INVALIDPUBLICKEY);

	ret = dns_rdataclass_totext(key->key_class, &classb);
	if (ret != ISC_R_SUCCESS)
		return (DST_R_INVALIDPUBLICKEY);

	/*
	 * Make the filename.
	 */
	isc_buffer_init(&fileb, filename, sizeof(filename));
	ret = dst_key_buildfilename(key, DST_TYPE_PUBLIC, directory, &fileb);
	if (ret != ISC_R_SUCCESS)
		return (ret);

	/*
	 * Create public key file.
	 */
	if ((fp = fopen(filename, "w")) == NULL)
		return (DST_R_WRITEERROR);

	if (issymmetric(key)) {
		access = 0;
		isc_fsaccess_add(ISC_FSACCESS_OWNER,
				 ISC_FSACCESS_READ | ISC_FSACCESS_WRITE,
				 &access);
		(void)isc_fsaccess_set(filename, access);
	}

	ret = dns_name_print(key->key_name, fp);
	if (ret != ISC_R_SUCCESS) {
		fclose(fp);
		return (ret);
	}

	fprintf(fp, " ");

	isc_buffer_usedregion(&classb, &r);
	fwrite(r.base, 1, r.length, fp);

	if ((type & DST_TYPE_KEY) != 0)
		fprintf(fp, " KEY ");
	else
		fprintf(fp, " DNSKEY ");

	isc_buffer_usedregion(&textb, &r);
	fwrite(r.base, 1, r.length, fp);

	fputc('\n', fp);
	fclose(fp);

	return (ISC_R_SUCCESS);
}