/*
* Copyright (C) 2008, 2009, 2015-2017 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/.
*/
/* $Id: nsec3param_51.c,v 1.7 2009/12/04 21:09:34 marka 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/iterated_hash.h>
#include <isc/base32.h>
#define RRTYPE_NSEC3PARAM_ATTRIBUTES (DNS_RDATATYPEATTR_DNSSEC)
static inline isc_result_t
fromtext_nsec3param(ARGS_FROMTEXT) {
isc_token_t token;
unsigned int flags = 0;
unsigned char hashalg;
REQUIRE(type == dns_rdatatype_nsec3param);
UNUSED(type);
UNUSED(rdclass);
UNUSED(callbacks);
UNUSED(origin);
UNUSED(options);
/* Hash. */
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
ISC_FALSE));
RETTOK(dns_hashalg_fromtext(&hashalg, &token.value.as_textregion));
RETERR(uint8_tobuffer(hashalg, target));
/* Flags. */
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
ISC_FALSE));
flags = token.value.as_ulong;
if (flags > 255U)
RETTOK(ISC_R_RANGE);
RETERR(uint8_tobuffer(flags, target));
/* Iterations. */
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
ISC_FALSE));
if (token.value.as_ulong > 0xffffU)
RETTOK(ISC_R_RANGE);
RETERR(uint16_tobuffer(token.value.as_ulong, target));
/* Salt. */
RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
ISC_FALSE));
if (token.value.as_textregion.length > (255*2))
RETTOK(DNS_R_TEXTTOOLONG);
if (strcmp(DNS_AS_STR(token), "-") == 0) {
RETERR(uint8_tobuffer(0, target));
} else {
RETERR(uint8_tobuffer(strlen(DNS_AS_STR(token)) / 2, target));
RETERR(isc_hex_decodestring(DNS_AS_STR(token), target));
}
return (ISC_R_SUCCESS);
}
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 ")];
isc_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));
}
static inline int
compare_nsec3param(ARGS_COMPARE) {
isc_region_t r1;
isc_region_t r2;
REQUIRE(rdata1->type == rdata2->type);
REQUIRE(rdata1->rdclass == rdata2->rdclass);
REQUIRE(rdata1->type == dns_rdatatype_nsec3param);
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_nsec3param(ARGS_FROMSTRUCT) {
dns_rdata_nsec3param_t *nsec3param = source;
REQUIRE(type == dns_rdatatype_nsec3param);
REQUIRE(source != NULL);
REQUIRE(nsec3param->common.rdtype == type);
REQUIRE(nsec3param->common.rdclass == rdclass);
UNUSED(type);
UNUSED(rdclass);
RETERR(uint8_tobuffer(nsec3param->hash, target));
RETERR(uint8_tobuffer(nsec3param->flags, target));
RETERR(uint16_tobuffer(nsec3param->iterations, target));
RETERR(uint8_tobuffer(nsec3param->salt_length, target));
RETERR(mem_tobuffer(target, nsec3param->salt,
nsec3param->salt_length));
return (ISC_R_SUCCESS);
}
static inline isc_result_t
tostruct_nsec3param(ARGS_TOSTRUCT) {
isc_region_t region;
dns_rdata_nsec3param_t *nsec3param = target;
REQUIRE(rdata->type == dns_rdatatype_nsec3param);
REQUIRE(target != NULL);
REQUIRE(rdata->length != 0);
nsec3param->common.rdclass = rdata->rdclass;
nsec3param->common.rdtype = rdata->type;
ISC_LINK_INIT(&nsec3param->common, link);
region.base = rdata->data;
region.length = rdata->length;
nsec3param->hash = uint8_consume_fromregion(&region);
nsec3param->flags = uint8_consume_fromregion(&region);
nsec3param->iterations = uint16_consume_fromregion(&region);
nsec3param->salt_length = uint8_consume_fromregion(&region);
nsec3param->salt = mem_maybedup(mctx, region.base,
nsec3param->salt_length);
if (nsec3param->salt == NULL)
return (ISC_R_NOMEMORY);
isc_region_consume(&region, nsec3param->salt_length);
nsec3param->mctx = mctx;
return (ISC_R_SUCCESS);
}
static inline void
freestruct_nsec3param(ARGS_FREESTRUCT) {
dns_rdata_nsec3param_t *nsec3param = source;
REQUIRE(source != NULL);
REQUIRE(nsec3param->common.rdtype == dns_rdatatype_nsec3param);
if (nsec3param->mctx == NULL)
return;
if (nsec3param->salt != NULL)
isc_mem_free(nsec3param->mctx, nsec3param->salt);
nsec3param->mctx = NULL;
}
static inline isc_result_t
additionaldata_nsec3param(ARGS_ADDLDATA) {
REQUIRE(rdata->type == dns_rdatatype_nsec3param);
UNUSED(rdata);
UNUSED(add);
UNUSED(arg);
return (ISC_R_SUCCESS);
}
static inline isc_result_t
digest_nsec3param(ARGS_DIGEST) {
isc_region_t r;
REQUIRE(rdata->type == dns_rdatatype_nsec3param);
dns_rdata_toregion(rdata, &r);
return ((digest)(arg, &r));
}
static inline isc_boolean_t
checkowner_nsec3param(ARGS_CHECKOWNER) {
REQUIRE(type == dns_rdatatype_nsec3param);
UNUSED(name);
UNUSED(type);
UNUSED(rdclass);
UNUSED(wildcard);
return (ISC_TRUE);
}
static inline isc_boolean_t
checknames_nsec3param(ARGS_CHECKNAMES) {
REQUIRE(rdata->type == dns_rdatatype_nsec3param);
UNUSED(rdata);
UNUSED(owner);
UNUSED(bad);
return (ISC_TRUE);
}
static inline int
casecompare_nsec3param(ARGS_COMPARE) {
return (compare_nsec3param(rdata1, rdata2));
}
#endif /* RDATA_GENERIC_NSEC3PARAM_51_C */