1 /* 2 * Copyright (C) Internet Systems Consortium, Inc. ("ISC") 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH 9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 10 * AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT, 11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE 13 * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 14 * PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 /* $Id: zonemd_63.c,v 1.1 2021/04/02 06:37:40 florian Exp $ */ 18 19 /* RFC8976 */ 20 21 #ifndef RDATA_GENERIC_ZONEMD_63_C 22 #define RDATA_GENERIC_ZONEMD_63_C 23 24 #define DNS_ZONEMD_DIGEST_SHA384 (1) 25 26 static inline isc_result_t 27 totext_zonemd(ARGS_TOTEXT) { 28 isc_region_t sr; 29 char buf[sizeof("4294967295 ")]; 30 uint32_t n; 31 32 REQUIRE(rdata->type == dns_rdatatype_zonemd); 33 REQUIRE(rdata->length > 6); 34 35 dns_rdata_toregion(rdata, &sr); 36 37 /* serial */ 38 n = uint32_fromregion(&sr); 39 isc_region_consume(&sr, 4); 40 snprintf(buf, sizeof(buf), "%u ", n); 41 RETERR(isc_str_tobuffer(buf, target)); 42 43 /* scheme */ 44 n = uint8_fromregion(&sr); 45 isc_region_consume(&sr, 1); 46 snprintf(buf, sizeof(buf), "%u ", n); 47 RETERR(isc_str_tobuffer(buf, target)); 48 49 /* hash algo */ 50 n = uint8_fromregion(&sr); 51 isc_region_consume(&sr, 1); 52 snprintf(buf, sizeof(buf), "%u", n); 53 RETERR(isc_str_tobuffer(buf, target)); 54 55 /* Digest */ 56 if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) 57 RETERR(isc_str_tobuffer(" (", target)); 58 RETERR(isc_str_tobuffer(tctx->linebreak, target)); 59 if ((tctx->flags & DNS_STYLEFLAG_NOCRYPTO) == 0) { 60 if (tctx->width == 0) /* No splitting */ 61 RETERR(isc_hex_totext(&sr, 0, "", target)); 62 else 63 RETERR(isc_hex_totext(&sr, tctx->width - 2, 64 tctx->linebreak, target)); 65 } else 66 RETERR(isc_str_tobuffer("[omitted]", target)); 67 if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) 68 RETERR(isc_str_tobuffer(" )", target)); 69 return (ISC_R_SUCCESS); 70 } 71 72 static inline isc_result_t 73 fromwire_zonemd(ARGS_FROMWIRE) { 74 isc_region_t sr; 75 76 REQUIRE(type == dns_rdatatype_zonemd); 77 78 UNUSED(type); 79 UNUSED(rdclass); 80 UNUSED(dctx); 81 UNUSED(options); 82 83 isc_buffer_activeregion(source, &sr); 84 /* 85 * serial: 4 86 * scheme: 1 87 * hash algorith: 1 88 * digest: at least 1 89 */ 90 if (sr.length < 7) 91 return (ISC_R_UNEXPECTEDEND); 92 93 if (sr.base[5] == DNS_ZONEMD_DIGEST_SHA384) { 94 if (sr.length < 6 + ISC_SHA384_DIGESTLENGTH) 95 return (ISC_R_UNEXPECTEDEND); 96 else 97 /* truncate in case there is additional junk */ 98 sr.length = 6 + ISC_SHA384_DIGESTLENGTH; 99 } 100 101 isc_buffer_forward(source, sr.length); 102 return (isc_mem_tobuffer(target, sr.base, sr.length)); 103 } 104 105 static inline isc_result_t 106 towire_zonemd(ARGS_TOWIRE) { 107 isc_region_t sr; 108 109 REQUIRE(rdata->type == dns_rdatatype_zonemd); 110 REQUIRE(rdata->length != 0); 111 112 UNUSED(cctx); 113 114 dns_rdata_toregion(rdata, &sr); 115 return (isc_mem_tobuffer(target, sr.base, sr.length)); 116 } 117 118 #endif /* RDATA_GENERIC_ZONEMD_63_C */ 119