dlv_32769.c 7.54 KB
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/*
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 * Copyright (C) 2004, 2006, 2007, 2009-2011  Internet Systems Consortium, Inc. ("ISC")
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 *
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 * Permission to use, copy, modify, and/or distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
 * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
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 */

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/* $Id$ */
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/* draft-ietf-dnsext-delegation-signer-05.txt */

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#ifndef RDATA_GENERIC_DLV_32769_C
#define RDATA_GENERIC_DLV_32769_C
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#define RRTYPE_DLV_ATTRIBUTES 0

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#include <isc/sha1.h>
#include <isc/sha2.h>

#include <dns/ds.h>


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static inline isc_result_t
fromtext_dlv(ARGS_FROMTEXT) {
	isc_token_t token;
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	unsigned char c;
	int length;
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	REQUIRE(type == 32769);
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	UNUSED(type);
	UNUSED(rdclass);
	UNUSED(origin);
	UNUSED(options);
	UNUSED(callbacks);

	/*
	 * Key tag.
	 */
	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
				      ISC_FALSE));
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	if (token.value.as_ulong > 0xffffU)
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		RETTOK(ISC_R_RANGE);
	RETERR(uint16_tobuffer(token.value.as_ulong, target));

	/*
	 * Algorithm.
	 */
	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
				      ISC_FALSE));
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	if (token.value.as_ulong > 0xffU)
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		RETTOK(ISC_R_RANGE);
	RETERR(uint8_tobuffer(token.value.as_ulong, target));

	/*
	 * Digest type.
	 */
	RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
				      ISC_FALSE));
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	if (token.value.as_ulong > 0xffU)
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		RETTOK(ISC_R_RANGE);
	RETERR(uint8_tobuffer(token.value.as_ulong, target));
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	c = (unsigned char) token.value.as_ulong;
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	/*
	 * Digest.
	 */
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	switch (c) {
	case DNS_DSDIGEST_SHA1:
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		length = ISC_SHA1_DIGESTLENGTH;
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		break;
	case DNS_DSDIGEST_SHA256:
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		length = ISC_SHA256_DIGESTLENGTH;
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		break;
	case DNS_DSDIGEST_GOST:
		length = ISC_GOST_DIGESTLENGTH;
		break;
	default:
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		length = -1;
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		break;
	}
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	return (isc_hex_tobuffer(lexer, target, -1));
}

static inline isc_result_t
totext_dlv(ARGS_TOTEXT) {
	isc_region_t sr;
	char buf[sizeof("64000 ")];
	unsigned int n;

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	REQUIRE(rdata->type == 32769);
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	REQUIRE(rdata->length != 0);

	UNUSED(tctx);

	dns_rdata_toregion(rdata, &sr);

	/*
	 * Key tag.
	 */
	n = uint16_fromregion(&sr);
	isc_region_consume(&sr, 2);
	sprintf(buf, "%u ", n);
	RETERR(str_totext(buf, target));

	/*
	 * Algorithm.
	 */
	n = uint8_fromregion(&sr);
	isc_region_consume(&sr, 1);
	sprintf(buf, "%u ", n);
	RETERR(str_totext(buf, target));

	/*
	 * Digest type.
	 */
	n = uint8_fromregion(&sr);
	isc_region_consume(&sr, 1);
	sprintf(buf, "%u", n);
	RETERR(str_totext(buf, target));

	/*
	 * Digest.
	 */
	if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
		RETERR(str_totext(" (", target));
	RETERR(str_totext(tctx->linebreak, target));
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	if (tctx->width == 0) /* No splitting */
		RETERR(isc_hex_totext(&sr, 0, "", target));
	else
		RETERR(isc_hex_totext(&sr, tctx->width - 2,
				      tctx->linebreak, target));
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	if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
		RETERR(str_totext(" )", target));
	return (ISC_R_SUCCESS);
}

static inline isc_result_t
fromwire_dlv(ARGS_FROMWIRE) {
	isc_region_t sr;

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	REQUIRE(type == 32769);
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	UNUSED(type);
	UNUSED(rdclass);
	UNUSED(dctx);
	UNUSED(options);

	isc_buffer_activeregion(source, &sr);
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	/*
	 * Check digest lengths if we know them.
	 */
	if (sr.length < 4 ||
	    (sr.base[3] == DNS_DSDIGEST_SHA1 &&
	     sr.length < 4 + ISC_SHA1_DIGESTLENGTH) ||
	    (sr.base[3] == DNS_DSDIGEST_SHA256 &&
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	     sr.length < 4 + ISC_SHA256_DIGESTLENGTH) ||
	    (sr.base[3] == DNS_DSDIGEST_GOST &&
	     sr.length < 4 + ISC_GOST_DIGESTLENGTH))
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		return (ISC_R_UNEXPECTEDEND);

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	/*
	 * Only copy digest lengths if we know them.
	 * If there is extra data dns_rdata_fromwire() will
	 * detect that.
	 */
	if (sr.base[3] == DNS_DSDIGEST_SHA1)
		sr.length = 4 + ISC_SHA1_DIGESTLENGTH;
	else if (sr.base[3] == DNS_DSDIGEST_SHA256)
		sr.length = 4 + ISC_SHA256_DIGESTLENGTH;
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	else if (sr.base[3] == DNS_DSDIGEST_GOST)
		sr.length = 4 + ISC_GOST_DIGESTLENGTH;
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	isc_buffer_forward(source, sr.length);
	return (mem_tobuffer(target, sr.base, sr.length));
}

static inline isc_result_t
towire_dlv(ARGS_TOWIRE) {
	isc_region_t sr;

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	REQUIRE(rdata->type == 32769);
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	REQUIRE(rdata->length != 0);

	UNUSED(cctx);

	dns_rdata_toregion(rdata, &sr);
	return (mem_tobuffer(target, sr.base, sr.length));
}

static inline int
compare_dlv(ARGS_COMPARE) {
	isc_region_t r1;
	isc_region_t r2;

	REQUIRE(rdata1->type == rdata2->type);
	REQUIRE(rdata1->rdclass == rdata2->rdclass);
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	REQUIRE(rdata1->type == 32769);
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	REQUIRE(rdata1->length != 0);
	REQUIRE(rdata2->length != 0);

	dns_rdata_toregion(rdata1, &r1);
	dns_rdata_toregion(rdata2, &r2);
	return (isc_region_compare(&r1, &r2));
}

static inline isc_result_t
fromstruct_dlv(ARGS_FROMSTRUCT) {
	dns_rdata_dlv_t *dlv = source;

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	REQUIRE(type == 32769);
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	REQUIRE(source != NULL);
	REQUIRE(dlv->common.rdtype == type);
	REQUIRE(dlv->common.rdclass == rdclass);
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	switch (dlv->digest_type) {
	case DNS_DSDIGEST_SHA1:
		REQUIRE(dlv->length == ISC_SHA1_DIGESTLENGTH);
		break;
	case DNS_DSDIGEST_SHA256:
		REQUIRE(dlv->length == ISC_SHA256_DIGESTLENGTH);
		break;
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	case DNS_DSDIGEST_GOST:
		REQUIRE(dlv->length == ISC_GOST_DIGESTLENGTH);
		break;
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	}
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	UNUSED(type);
	UNUSED(rdclass);

	RETERR(uint16_tobuffer(dlv->key_tag, target));
	RETERR(uint8_tobuffer(dlv->algorithm, target));
	RETERR(uint8_tobuffer(dlv->digest_type, target));

	return (mem_tobuffer(target, dlv->digest, dlv->length));
}

static inline isc_result_t
tostruct_dlv(ARGS_TOSTRUCT) {
	dns_rdata_dlv_t *dlv = target;
	isc_region_t region;

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	REQUIRE(rdata->type == 32769);
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	REQUIRE(target != NULL);
	REQUIRE(rdata->length != 0);

	dlv->common.rdclass = rdata->rdclass;
	dlv->common.rdtype = rdata->type;
	ISC_LINK_INIT(&dlv->common, link);

	dns_rdata_toregion(rdata, &region);

	dlv->key_tag = uint16_fromregion(&region);
	isc_region_consume(&region, 2);
	dlv->algorithm = uint8_fromregion(&region);
	isc_region_consume(&region, 1);
	dlv->digest_type = uint8_fromregion(&region);
	isc_region_consume(&region, 1);
	dlv->length = region.length;

	dlv->digest = mem_maybedup(mctx, region.base, region.length);
	if (dlv->digest == NULL)
		return (ISC_R_NOMEMORY);

	dlv->mctx = mctx;
	return (ISC_R_SUCCESS);
}

static inline void
freestruct_dlv(ARGS_FREESTRUCT) {
	dns_rdata_dlv_t *dlv = source;

	REQUIRE(dlv != NULL);
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	REQUIRE(dlv->common.rdtype == 32769);
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	if (dlv->mctx == NULL)
		return;

	if (dlv->digest != NULL)
		isc_mem_free(dlv->mctx, dlv->digest);
	dlv->mctx = NULL;
}

static inline isc_result_t
additionaldata_dlv(ARGS_ADDLDATA) {
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	REQUIRE(rdata->type == 32769);
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	UNUSED(rdata);
	UNUSED(add);
	UNUSED(arg);

	return (ISC_R_SUCCESS);
}

static inline isc_result_t
digest_dlv(ARGS_DIGEST) {
	isc_region_t r;

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	REQUIRE(rdata->type == 32769);
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	dns_rdata_toregion(rdata, &r);

	return ((digest)(arg, &r));
}

static inline isc_boolean_t
checkowner_dlv(ARGS_CHECKOWNER) {

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	REQUIRE(type == 32769);
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	UNUSED(name);
	UNUSED(type);
	UNUSED(rdclass);
	UNUSED(wildcard);

	return (ISC_TRUE);
}

static inline isc_boolean_t
checknames_dlv(ARGS_CHECKNAMES) {

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	REQUIRE(rdata->type == 32769);
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	UNUSED(rdata);
	UNUSED(owner);
	UNUSED(bad);

	return (ISC_TRUE);
}

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static inline int
casecompare_dlv(ARGS_COMPARE) {
	return (compare_dlv(rdata1, rdata2));
}

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#endif	/* RDATA_GENERIC_DLV_32769_C */