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Diffstat (limited to '')
| -rw-r--r-- | lib/dns/rdata/generic/ds_43.c | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/lib/dns/rdata/generic/ds_43.c b/lib/dns/rdata/generic/ds_43.c new file mode 100644 index 0000000..482f32b --- /dev/null +++ b/lib/dns/rdata/generic/ds_43.c @@ -0,0 +1,386 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * 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 https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/* RFC3658 */ + +#ifndef RDATA_GENERIC_DS_43_C +#define RDATA_GENERIC_DS_43_C + +#define RRTYPE_DS_ATTRIBUTES \ + (DNS_RDATATYPEATTR_DNSSEC | DNS_RDATATYPEATTR_ZONECUTAUTH | \ + DNS_RDATATYPEATTR_ATPARENT) + +#include <isc/md.h> + +#include <dns/ds.h> + +static isc_result_t +generic_fromtext_ds(ARGS_FROMTEXT) { + isc_token_t token; + unsigned char c; + int length; + + UNUSED(type); + UNUSED(rdclass); + UNUSED(origin); + UNUSED(options); + UNUSED(callbacks); + + /* + * Key tag. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number, + false)); + if (token.value.as_ulong > 0xffffU) { + RETTOK(ISC_R_RANGE); + } + RETERR(uint16_tobuffer(token.value.as_ulong, target)); + + /* + * Algorithm. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, + false)); + RETTOK(dns_secalg_fromtext(&c, &token.value.as_textregion)); + RETERR(mem_tobuffer(target, &c, 1)); + + /* + * Digest type. + */ + RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string, + false)); + RETTOK(dns_dsdigest_fromtext(&c, &token.value.as_textregion)); + RETERR(mem_tobuffer(target, &c, 1)); + + /* + * Digest. + */ + switch (c) { + case DNS_DSDIGEST_SHA1: + length = ISC_SHA1_DIGESTLENGTH; + break; + case DNS_DSDIGEST_SHA256: + length = ISC_SHA256_DIGESTLENGTH; + break; + case DNS_DSDIGEST_SHA384: + length = ISC_SHA384_DIGESTLENGTH; + break; + default: + length = -2; + break; + } + return (isc_hex_tobuffer(lexer, target, length)); +} + +static isc_result_t +fromtext_ds(ARGS_FROMTEXT) { + REQUIRE(type == dns_rdatatype_ds); + + return (generic_fromtext_ds(CALL_FROMTEXT)); +} + +static isc_result_t +generic_totext_ds(ARGS_TOTEXT) { + isc_region_t sr; + char buf[sizeof("64000 ")]; + unsigned int n; + + REQUIRE(rdata->length != 0); + + UNUSED(tctx); + + dns_rdata_toregion(rdata, &sr); + + /* + * Key tag. + */ + n = uint16_fromregion(&sr); + isc_region_consume(&sr, 2); + snprintf(buf, sizeof(buf), "%u ", n); + RETERR(str_totext(buf, target)); + + /* + * Algorithm. + */ + n = uint8_fromregion(&sr); + isc_region_consume(&sr, 1); + snprintf(buf, sizeof(buf), "%u ", n); + RETERR(str_totext(buf, target)); + + /* + * Digest type. + */ + n = uint8_fromregion(&sr); + isc_region_consume(&sr, 1); + snprintf(buf, sizeof(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)); + 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(str_totext("[omitted]", target)); + } + if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) { + RETERR(str_totext(" )", target)); + } + return (ISC_R_SUCCESS); +} + +static isc_result_t +totext_ds(ARGS_TOTEXT) { + REQUIRE(rdata != NULL); + REQUIRE(rdata->type == dns_rdatatype_ds); + + return (generic_totext_ds(CALL_TOTEXT)); +} + +static isc_result_t +generic_fromwire_ds(ARGS_FROMWIRE) { + isc_region_t sr; + + UNUSED(type); + UNUSED(rdclass); + UNUSED(dctx); + UNUSED(options); + + isc_buffer_activeregion(source, &sr); + + /* + * Check digest lengths if we know them. + */ + if (sr.length < 5 || + (sr.base[3] == DNS_DSDIGEST_SHA1 && + sr.length < 4 + ISC_SHA1_DIGESTLENGTH) || + (sr.base[3] == DNS_DSDIGEST_SHA256 && + sr.length < 4 + ISC_SHA256_DIGESTLENGTH) || + (sr.base[3] == DNS_DSDIGEST_SHA384 && + sr.length < 4 + ISC_SHA384_DIGESTLENGTH)) + { + return (ISC_R_UNEXPECTEDEND); + } + + /* + * 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; + } else if (sr.base[3] == DNS_DSDIGEST_SHA384) { + sr.length = 4 + ISC_SHA384_DIGESTLENGTH; + } + + isc_buffer_forward(source, sr.length); + return (mem_tobuffer(target, sr.base, sr.length)); +} + +static isc_result_t +fromwire_ds(ARGS_FROMWIRE) { + REQUIRE(type == dns_rdatatype_ds); + + return (generic_fromwire_ds(CALL_FROMWIRE)); +} + +static isc_result_t +towire_ds(ARGS_TOWIRE) { + isc_region_t sr; + + REQUIRE(rdata->type == dns_rdatatype_ds); + REQUIRE(rdata->length != 0); + + UNUSED(cctx); + + dns_rdata_toregion(rdata, &sr); + return (mem_tobuffer(target, sr.base, sr.length)); +} + +static int +compare_ds(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_ds); + 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 isc_result_t +generic_fromstruct_ds(ARGS_FROMSTRUCT) { + dns_rdata_ds_t *ds = source; + + REQUIRE(ds != NULL); + REQUIRE(ds->common.rdtype == type); + REQUIRE(ds->common.rdclass == rdclass); + + UNUSED(type); + UNUSED(rdclass); + + switch (ds->digest_type) { + case DNS_DSDIGEST_SHA1: + REQUIRE(ds->length == ISC_SHA1_DIGESTLENGTH); + break; + case DNS_DSDIGEST_SHA256: + REQUIRE(ds->length == ISC_SHA256_DIGESTLENGTH); + break; + case DNS_DSDIGEST_SHA384: + REQUIRE(ds->length == ISC_SHA384_DIGESTLENGTH); + break; + } + + RETERR(uint16_tobuffer(ds->key_tag, target)); + RETERR(uint8_tobuffer(ds->algorithm, target)); + RETERR(uint8_tobuffer(ds->digest_type, target)); + + return (mem_tobuffer(target, ds->digest, ds->length)); +} + +static isc_result_t +fromstruct_ds(ARGS_FROMSTRUCT) { + REQUIRE(type == dns_rdatatype_ds); + + return (generic_fromstruct_ds(CALL_FROMSTRUCT)); +} + +static isc_result_t +generic_tostruct_ds(ARGS_TOSTRUCT) { + dns_rdata_ds_t *ds = target; + isc_region_t region; + + REQUIRE(ds != NULL); + REQUIRE(rdata->length != 0); + REQUIRE(ds->common.rdtype == rdata->type); + REQUIRE(ds->common.rdclass == rdata->rdclass); + REQUIRE(!ISC_LINK_LINKED(&ds->common, link)); + + dns_rdata_toregion(rdata, ®ion); + + ds->key_tag = uint16_fromregion(®ion); + isc_region_consume(®ion, 2); + ds->algorithm = uint8_fromregion(®ion); + isc_region_consume(®ion, 1); + ds->digest_type = uint8_fromregion(®ion); + isc_region_consume(®ion, 1); + ds->length = region.length; + + ds->digest = mem_maybedup(mctx, region.base, region.length); + if (ds->digest == NULL) { + return (ISC_R_NOMEMORY); + } + + ds->mctx = mctx; + return (ISC_R_SUCCESS); +} + +static isc_result_t +tostruct_ds(ARGS_TOSTRUCT) { + dns_rdata_ds_t *ds = target; + + REQUIRE(rdata->type == dns_rdatatype_ds); + REQUIRE(ds != NULL); + + ds->common.rdclass = rdata->rdclass; + ds->common.rdtype = rdata->type; + ISC_LINK_INIT(&ds->common, link); + + return (generic_tostruct_ds(CALL_TOSTRUCT)); +} + +static void +freestruct_ds(ARGS_FREESTRUCT) { + dns_rdata_ds_t *ds = source; + + REQUIRE(ds != NULL); + REQUIRE(ds->common.rdtype == dns_rdatatype_ds); + + if (ds->mctx == NULL) { + return; + } + + if (ds->digest != NULL) { + isc_mem_free(ds->mctx, ds->digest); + } + ds->mctx = NULL; +} + +static isc_result_t +additionaldata_ds(ARGS_ADDLDATA) { + REQUIRE(rdata->type == dns_rdatatype_ds); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(add); + UNUSED(arg); + + return (ISC_R_SUCCESS); +} + +static isc_result_t +digest_ds(ARGS_DIGEST) { + isc_region_t r; + + REQUIRE(rdata->type == dns_rdatatype_ds); + + dns_rdata_toregion(rdata, &r); + + return ((digest)(arg, &r)); +} + +static bool +checkowner_ds(ARGS_CHECKOWNER) { + REQUIRE(type == dns_rdatatype_ds); + + UNUSED(name); + UNUSED(type); + UNUSED(rdclass); + UNUSED(wildcard); + + return (true); +} + +static bool +checknames_ds(ARGS_CHECKNAMES) { + REQUIRE(rdata->type == dns_rdatatype_ds); + + UNUSED(rdata); + UNUSED(owner); + UNUSED(bad); + + return (true); +} + +static int +casecompare_ds(ARGS_COMPARE) { + return (compare_ds(rdata1, rdata2)); +} + +#endif /* RDATA_GENERIC_DS_43_C */ |