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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: nsec3param_51.c,v 1.10 2020/02/26 18:38:15 florian Exp $ */
/*
* Copyright (C) 2004 Nominet, Ltd.
*
* Permission to use, copy, modify, and 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 NOMINET 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.
*/
/* RFC 5155 */
#ifndef RDATA_GENERIC_NSEC3PARAM_51_C
#define RDATA_GENERIC_NSEC3PARAM_51_C
#include <isc/base32.h>
static inline isc_result_t
totext_nsec3param(ARGS_TOTEXT) {
isc_region_t sr;
unsigned int i, j;
unsigned char hash;
unsigned char flags;
char buf[sizeof("65535 ")];
uint32_t iterations;
REQUIRE(rdata->type == dns_rdatatype_nsec3param);
REQUIRE(rdata->length != 0);
UNUSED(tctx);
dns_rdata_toregion(rdata, &sr);
hash = uint8_fromregion(&sr);
isc_region_consume(&sr, 1);
flags = uint8_fromregion(&sr);
isc_region_consume(&sr, 1);
iterations = uint16_fromregion(&sr);
isc_region_consume(&sr, 2);
snprintf(buf, sizeof(buf), "%u ", hash);
RETERR(str_totext(buf, target));
snprintf(buf, sizeof(buf), "%u ", flags);
RETERR(str_totext(buf, target));
snprintf(buf, sizeof(buf), "%u ", iterations);
RETERR(str_totext(buf, target));
j = uint8_fromregion(&sr);
isc_region_consume(&sr, 1);
INSIST(j <= sr.length);
if (j != 0) {
i = sr.length;
sr.length = j;
RETERR(isc_hex_totext(&sr, 1, "", target));
sr.length = i - j;
} else
RETERR(str_totext("-", target));
return (ISC_R_SUCCESS);
}
static inline isc_result_t
fromwire_nsec3param(ARGS_FROMWIRE) {
isc_region_t sr, rr;
unsigned int saltlen;
REQUIRE(type == dns_rdatatype_nsec3param);
UNUSED(type);
UNUSED(rdclass);
UNUSED(options);
UNUSED(dctx);
isc_buffer_activeregion(source, &sr);
rr = sr;
/* hash(1), flags(1), iterations(2), saltlen(1) */
if (sr.length < 5U)
RETERR(DNS_R_FORMERR);
saltlen = sr.base[4];
isc_region_consume(&sr, 5);
if (sr.length < saltlen)
RETERR(DNS_R_FORMERR);
isc_region_consume(&sr, saltlen);
RETERR(mem_tobuffer(target, rr.base, rr.length));
isc_buffer_forward(source, rr.length);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
towire_nsec3param(ARGS_TOWIRE) {
isc_region_t sr;
REQUIRE(rdata->type == dns_rdatatype_nsec3param);
REQUIRE(rdata->length != 0);
UNUSED(cctx);
dns_rdata_toregion(rdata, &sr);
return (mem_tobuffer(target, sr.base, sr.length));
}
#endif /* RDATA_GENERIC_NSEC3PARAM_51_C */
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