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/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* 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.
*/
/* $Id: zonemd_63.c,v 1.1 2021/04/02 06:37:40 florian Exp $ */
/* RFC8976 */
#ifndef RDATA_GENERIC_ZONEMD_63_C
#define RDATA_GENERIC_ZONEMD_63_C
#define DNS_ZONEMD_DIGEST_SHA384 (1)
static inline isc_result_t
totext_zonemd(ARGS_TOTEXT) {
isc_region_t sr;
char buf[sizeof("4294967295 ")];
uint32_t n;
REQUIRE(rdata->type == dns_rdatatype_zonemd);
REQUIRE(rdata->length > 6);
dns_rdata_toregion(rdata, &sr);
/* serial */
n = uint32_fromregion(&sr);
isc_region_consume(&sr, 4);
snprintf(buf, sizeof(buf), "%u ", n);
RETERR(isc_str_tobuffer(buf, target));
/* scheme */
n = uint8_fromregion(&sr);
isc_region_consume(&sr, 1);
snprintf(buf, sizeof(buf), "%u ", n);
RETERR(isc_str_tobuffer(buf, target));
/* hash algo */
n = uint8_fromregion(&sr);
isc_region_consume(&sr, 1);
snprintf(buf, sizeof(buf), "%u", n);
RETERR(isc_str_tobuffer(buf, target));
/* Digest */
if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
RETERR(isc_str_tobuffer(" (", target));
RETERR(isc_str_tobuffer(tctx->linebreak, target));
if ((tctx->flags & DNS_STYLEFLAG_NOCRYPTO) == 0) {
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));
} else
RETERR(isc_str_tobuffer("[omitted]", target));
if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
RETERR(isc_str_tobuffer(" )", target));
return (ISC_R_SUCCESS);
}
static inline isc_result_t
fromwire_zonemd(ARGS_FROMWIRE) {
isc_region_t sr;
REQUIRE(type == dns_rdatatype_zonemd);
UNUSED(type);
UNUSED(rdclass);
UNUSED(dctx);
UNUSED(options);
isc_buffer_activeregion(source, &sr);
/*
* serial: 4
* scheme: 1
* hash algorith: 1
* digest: at least 1
*/
if (sr.length < 7)
return (ISC_R_UNEXPECTEDEND);
if (sr.base[5] == DNS_ZONEMD_DIGEST_SHA384) {
if (sr.length < 6 + ISC_SHA384_DIGESTLENGTH)
return (ISC_R_UNEXPECTEDEND);
else
/* truncate in case there is additional junk */
sr.length = 6 + ISC_SHA384_DIGESTLENGTH;
}
isc_buffer_forward(source, sr.length);
return (isc_mem_tobuffer(target, sr.base, sr.length));
}
static inline isc_result_t
towire_zonemd(ARGS_TOWIRE) {
isc_region_t sr;
REQUIRE(rdata->type == dns_rdatatype_zonemd);
REQUIRE(rdata->length != 0);
UNUSED(cctx);
dns_rdata_toregion(rdata, &sr);
return (isc_mem_tobuffer(target, sr.base, sr.length));
}
#endif /* RDATA_GENERIC_ZONEMD_63_C */
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