225 lines
5.4 KiB
C
225 lines
5.4 KiB
C
/*
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* Copyright (C) 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
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: tkey_249.c,v 1.14 2024/04/23 13:34:50 jsg Exp $ */
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/*
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* Reviewed: Thu Mar 16 17:35:30 PST 2000 by halley.
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*/
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/* draft-ietf-dnsext-tkey-01.txt */
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#ifndef RDATA_GENERIC_TKEY_249_C
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#define RDATA_GENERIC_TKEY_249_C
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static inline isc_result_t
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totext_tkey(ARGS_TOTEXT) {
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isc_region_t sr, dr;
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char buf[sizeof("4294967295 ")];
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unsigned long n;
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dns_name_t name;
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dns_name_t prefix;
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int sub;
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REQUIRE(rdata->type == dns_rdatatype_tkey);
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REQUIRE(rdata->length != 0);
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dns_rdata_toregion(rdata, &sr);
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/*
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* Algorithm.
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*/
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dns_name_init(&name, NULL);
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dns_name_init(&prefix, NULL);
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dns_name_fromregion(&name, &sr);
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sub = name_prefix(&name, tctx->origin, &prefix);
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RETERR(dns_name_totext(&prefix, sub, target));
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RETERR(isc_str_tobuffer(" ", target));
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isc_region_consume(&sr, name_length(&name));
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/*
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* Inception.
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*/
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n = uint32_fromregion(&sr);
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isc_region_consume(&sr, 4);
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snprintf(buf, sizeof(buf), "%lu ", n);
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RETERR(isc_str_tobuffer(buf, target));
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/*
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* Expiration.
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*/
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n = uint32_fromregion(&sr);
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isc_region_consume(&sr, 4);
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snprintf(buf, sizeof(buf), "%lu ", n);
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RETERR(isc_str_tobuffer(buf, target));
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/*
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* Mode.
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*/
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n = uint16_fromregion(&sr);
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isc_region_consume(&sr, 2);
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snprintf(buf, sizeof(buf), "%lu ", n);
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RETERR(isc_str_tobuffer(buf, target));
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/*
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* Error.
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*/
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n = uint16_fromregion(&sr);
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isc_region_consume(&sr, 2);
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if (dns_tsigrcode_totext((dns_rcode_t)n, target) == ISC_R_SUCCESS)
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RETERR(isc_str_tobuffer(" ", target));
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else {
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snprintf(buf, sizeof(buf), "%lu ", n);
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RETERR(isc_str_tobuffer(buf, target));
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}
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/*
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* Key Size.
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*/
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n = uint16_fromregion(&sr);
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isc_region_consume(&sr, 2);
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snprintf(buf, sizeof(buf), "%lu", n);
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RETERR(isc_str_tobuffer(buf, target));
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/*
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* Key Data.
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*/
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REQUIRE(n <= sr.length);
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dr = sr;
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dr.length = n;
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if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
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RETERR(isc_str_tobuffer(" (", target));
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RETERR(isc_str_tobuffer(tctx->linebreak, target));
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if (tctx->width == 0) /* No splitting */
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RETERR(isc_base64_totext(&dr, 60, "", target));
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else
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RETERR(isc_base64_totext(&dr, tctx->width - 2,
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tctx->linebreak, target));
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if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
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RETERR(isc_str_tobuffer(" ) ", target));
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else
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RETERR(isc_str_tobuffer(" ", target));
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isc_region_consume(&sr, n);
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/*
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* Other Size.
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*/
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n = uint16_fromregion(&sr);
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isc_region_consume(&sr, 2);
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snprintf(buf, sizeof(buf), "%lu", n);
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RETERR(isc_str_tobuffer(buf, target));
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/*
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* Other Data.
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*/
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REQUIRE(n <= sr.length);
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if (n != 0U) {
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dr = sr;
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dr.length = n;
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if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
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RETERR(isc_str_tobuffer(" (", target));
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RETERR(isc_str_tobuffer(tctx->linebreak, target));
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if (tctx->width == 0) /* No splitting */
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RETERR(isc_base64_totext(&dr, 60, "", target));
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else
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RETERR(isc_base64_totext(&dr, tctx->width - 2,
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tctx->linebreak, target));
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if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
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RETERR(isc_str_tobuffer(" )", target));
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}
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return (ISC_R_SUCCESS);
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}
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static inline isc_result_t
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fromwire_tkey(ARGS_FROMWIRE) {
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isc_region_t sr;
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unsigned long n;
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dns_name_t name;
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REQUIRE(type == dns_rdatatype_tkey);
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UNUSED(type);
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UNUSED(rdclass);
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dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
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/*
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* Algorithm.
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*/
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dns_name_init(&name, NULL);
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RETERR(dns_name_fromwire(&name, source, dctx, options, target));
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/*
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* Inception: 4
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* Expiration: 4
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* Mode: 2
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* Error: 2
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*/
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isc_buffer_activeregion(source, &sr);
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if (sr.length < 12)
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return (ISC_R_UNEXPECTEDEND);
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RETERR(isc_mem_tobuffer(target, sr.base, 12));
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isc_region_consume(&sr, 12);
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isc_buffer_forward(source, 12);
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/*
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* Key Length + Key Data.
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*/
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if (sr.length < 2)
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return (ISC_R_UNEXPECTEDEND);
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n = uint16_fromregion(&sr);
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if (sr.length < n + 2)
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return (ISC_R_UNEXPECTEDEND);
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RETERR(isc_mem_tobuffer(target, sr.base, n + 2));
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isc_region_consume(&sr, n + 2);
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isc_buffer_forward(source, n + 2);
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/*
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* Other Length + Other Data.
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*/
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if (sr.length < 2)
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return (ISC_R_UNEXPECTEDEND);
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n = uint16_fromregion(&sr);
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if (sr.length < n + 2)
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return (ISC_R_UNEXPECTEDEND);
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isc_buffer_forward(source, n + 2);
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return (isc_mem_tobuffer(target, sr.base, n + 2));
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}
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static inline isc_result_t
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towire_tkey(ARGS_TOWIRE) {
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isc_region_t sr;
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dns_name_t name;
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dns_offsets_t offsets;
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REQUIRE(rdata->type == dns_rdatatype_tkey);
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REQUIRE(rdata->length != 0);
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dns_compress_setmethods(cctx, DNS_COMPRESS_NONE);
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/*
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* Algorithm.
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*/
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dns_rdata_toregion(rdata, &sr);
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dns_name_init(&name, offsets);
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dns_name_fromregion(&name, &sr);
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RETERR(dns_name_towire(&name, cctx, target));
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isc_region_consume(&sr, name_length(&name));
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return (isc_mem_tobuffer(target, sr.base, sr.length));
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}
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#endif /* RDATA_GENERIC_TKEY_249_C */
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