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: hip_55.c,v 1.11 2020/02/26 18:38:15 florian Exp $ */ 18 19 /* reviewed: TBC */ 20 21 /* RFC 5205 */ 22 23 #ifndef RDATA_GENERIC_HIP_5_C 24 #define RDATA_GENERIC_HIP_5_C 25 26 static inline isc_result_t 27 totext_hip(ARGS_TOTEXT) { 28 isc_region_t region; 29 dns_name_t name; 30 unsigned int length, key_len, hit_len; 31 unsigned char algorithm; 32 char buf[sizeof("225 ")]; 33 34 REQUIRE(rdata->type == dns_rdatatype_hip); 35 REQUIRE(rdata->length != 0); 36 37 dns_rdata_toregion(rdata, ®ion); 38 39 hit_len = uint8_fromregion(®ion); 40 isc_region_consume(®ion, 1); 41 42 algorithm = uint8_fromregion(®ion); 43 isc_region_consume(®ion, 1); 44 45 key_len = uint16_fromregion(®ion); 46 isc_region_consume(®ion, 2); 47 48 if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) 49 RETERR(str_totext("( ", target)); 50 51 /* 52 * Algorithm 53 */ 54 snprintf(buf, sizeof(buf), "%u ", algorithm); 55 RETERR(str_totext(buf, target)); 56 57 /* 58 * HIT. 59 */ 60 INSIST(hit_len < region.length); 61 length = region.length; 62 region.length = hit_len; 63 RETERR(isc_hex_totext(®ion, 1, "", target)); 64 region.length = length - hit_len; 65 RETERR(str_totext(tctx->linebreak, target)); 66 67 /* 68 * Public KEY. 69 */ 70 INSIST(key_len <= region.length); 71 length = region.length; 72 region.length = key_len; 73 RETERR(isc_base64_totext(®ion, 1, "", target)); 74 region.length = length - key_len; 75 RETERR(str_totext(tctx->linebreak, target)); 76 77 /* 78 * Rendezvous Servers. 79 */ 80 dns_name_init(&name, NULL); 81 while (region.length > 0) { 82 dns_name_fromregion(&name, ®ion); 83 84 RETERR(dns_name_totext(&name, ISC_FALSE, target)); 85 isc_region_consume(®ion, name.length); 86 if (region.length > 0) 87 RETERR(str_totext(tctx->linebreak, target)); 88 } 89 if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0) 90 RETERR(str_totext(" )", target)); 91 return (ISC_R_SUCCESS); 92 } 93 94 static inline isc_result_t 95 fromwire_hip(ARGS_FROMWIRE) { 96 isc_region_t region, rr; 97 dns_name_t name; 98 uint8_t hit_len; 99 uint16_t key_len; 100 101 REQUIRE(type == dns_rdatatype_hip); 102 103 UNUSED(type); 104 UNUSED(rdclass); 105 106 isc_buffer_activeregion(source, ®ion); 107 if (region.length < 4U) 108 RETERR(DNS_R_FORMERR); 109 110 rr = region; 111 hit_len = uint8_fromregion(®ion); 112 if (hit_len == 0) 113 RETERR(DNS_R_FORMERR); 114 isc_region_consume(®ion, 2); /* hit length + algorithm */ 115 key_len = uint16_fromregion(®ion); 116 if (key_len == 0) 117 RETERR(DNS_R_FORMERR); 118 isc_region_consume(®ion, 2); 119 if (region.length < (unsigned) (hit_len + key_len)) 120 RETERR(DNS_R_FORMERR); 121 122 RETERR(mem_tobuffer(target, rr.base, 4 + hit_len + key_len)); 123 isc_buffer_forward(source, 4 + hit_len + key_len); 124 125 dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE); 126 while (isc_buffer_activelength(source) > 0) { 127 dns_name_init(&name, NULL); 128 RETERR(dns_name_fromwire(&name, source, dctx, options, target)); 129 } 130 return (ISC_R_SUCCESS); 131 } 132 133 static inline isc_result_t 134 towire_hip(ARGS_TOWIRE) { 135 isc_region_t region; 136 137 REQUIRE(rdata->type == dns_rdatatype_hip); 138 REQUIRE(rdata->length != 0); 139 140 UNUSED(cctx); 141 142 dns_rdata_toregion(rdata, ®ion); 143 return (mem_tobuffer(target, region.base, region.length)); 144 } 145 #endif /* RDATA_GENERIC_HIP_5_C */ 146