external/bsd/bind/dist/lib/dns/rdata/generic/dnskey_48.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (C) 2004, 2005, 2007, 2009  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 2003  Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and/or distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  12  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  13  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  14  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  15  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  16  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  17  * PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 /* Id: dnskey_48.c,v 1.10 2009/12/04 22:06:37 tbox Exp */
  21
  22 /*
  23  * Reviewed: Wed Mar 15 16:47:10 PST 2000 by halley.
  24  */
  25
  26 /* RFC2535 */
  27
  28 #ifndef RDATA_GENERIC_DNSKEY_48_C
  29 #define RDATA_GENERIC_DNSKEY_48_C
  30
  31 #include <dst/dst.h>
  32
  33 #define RRTYPE_DNSKEY_ATTRIBUTES (DNS_RDATATYPEATTR_DNSSEC)
  34
  35 static inline isc_result_t
  36 fromtext_dnskey(ARGS_FROMTEXT) {
  37         isc_token_t token;
  38         dns_secalg_t alg;
  39         dns_secproto_t proto;
  40         dns_keyflags_t flags;
  41
  42         REQUIRE(type == 48);
  43
  44         UNUSED(type);
  45         UNUSED(rdclass);
  46         UNUSED(origin);
  47         UNUSED(options);
  48         UNUSED(callbacks);
  49
  50         /* flags */
  51         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  52                                       ISC_FALSE));
  53         RETTOK(dns_keyflags_fromtext(&flags, &token.value.as_textregion));
  54         RETERR(uint16_tobuffer(flags, target));
  55
  56         /* protocol */
  57         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  58                                       ISC_FALSE));
  59         RETTOK(dns_secproto_fromtext(&proto, &token.value.as_textregion));
  60         RETERR(mem_tobuffer(target, &proto, 1));
  61
  62         /* algorithm */
  63         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  64                                       ISC_FALSE));
  65         RETTOK(dns_secalg_fromtext(&alg, &token.value.as_textregion));
  66         RETERR(mem_tobuffer(target, &alg, 1));
  67
  68         /* No Key? */
  69         if ((flags & 0xc000) == 0xc000)
  70                 return (ISC_R_SUCCESS);
  71
  72         return (isc_base64_tobuffer(lexer, target, -1));
  73 }
  74
  75 static inline isc_result_t
  76 totext_dnskey(ARGS_TOTEXT) {
  77         isc_region_t sr;
  78         char buf[sizeof("64000")];
  79         unsigned int flags;
  80         unsigned char algorithm;
  81         char namebuf[DNS_NAME_FORMATSIZE];
  82
  83         REQUIRE(rdata->type == 48);
  84         REQUIRE(rdata->length != 0);
  85
  86         dns_rdata_toregion(rdata, &sr);
  87
  88         /* flags */
  89         flags = uint16_fromregion(&sr);
  90         isc_region_consume(&sr, 2);
  91         sprintf(buf, "%u", flags);
  92         RETERR(str_totext(buf, target));
  93         RETERR(str_totext(" ", target));
  94
  95         /* protocol */
  96         sprintf(buf, "%u", sr.base[0]);
  97         isc_region_consume(&sr, 1);
  98         RETERR(str_totext(buf, target));
  99         RETERR(str_totext(" ", target));
 100
 101         /* algorithm */
 102         algorithm = sr.base[0];
 103         sprintf(buf, "%u", algorithm);
 104         isc_region_consume(&sr, 1);
 105         RETERR(str_totext(buf, target));
 106
 107         /* No Key? */
 108         if ((flags & 0xc000) == 0xc000)
 109                 return (ISC_R_SUCCESS);
 110
 111         if ((tctx->flags & DNS_STYLEFLAG_COMMENT) != 0 &&
 112              algorithm == DNS_KEYALG_PRIVATEDNS) {
 113                 dns_name_t name;
 114                 dns_name_init(&name, NULL);
 115                 dns_name_fromregion(&name, &sr);
 116                 dns_name_format(&name, namebuf, sizeof(namebuf));
 117         } else
 118                 namebuf[0] = 0;
 119
 120         /* key */
 121         if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
 122                 RETERR(str_totext(" (", target));
 123         RETERR(str_totext(tctx->linebreak, target));
 124         RETERR(isc_base64_totext(&sr, tctx->width - 2,
 125                                  tctx->linebreak, target));
 126
 127         if ((tctx->flags & DNS_STYLEFLAG_COMMENT) != 0)
 128                 RETERR(str_totext(tctx->linebreak, target));
 129         else if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
 130                 RETERR(str_totext(" ", target));
 131
 132         if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
 133                 RETERR(str_totext(")", target));
 134
 135         if ((tctx->flags & DNS_STYLEFLAG_COMMENT) != 0) {
 136                 isc_region_t tmpr;
 137
 138                 RETERR(str_totext(" ; key id = ", target));
 139                 dns_rdata_toregion(rdata, &tmpr);
 140                 sprintf(buf, "%u", dst_region_computeid(&tmpr, algorithm));
 141                 RETERR(str_totext(buf, target));
 142                 if (algorithm == DNS_KEYALG_PRIVATEDNS) {
 143                         RETERR(str_totext(tctx->linebreak, target));
 144                         RETERR(str_totext("; alg = ", target));
 145                         RETERR(str_totext(namebuf, target));
 146                 }
 147         }
 148         return (ISC_R_SUCCESS);
 149 }
 150
 151 static inline isc_result_t
 152 fromwire_dnskey(ARGS_FROMWIRE) {
 153         unsigned char algorithm;
 154         isc_region_t sr;
 155
 156         REQUIRE(type == 48);
 157
 158         UNUSED(type);
 159         UNUSED(rdclass);
 160         UNUSED(dctx);
 161         UNUSED(options);
 162
 163         isc_buffer_activeregion(source, &sr);
 164         if (sr.length < 4)
 165                 return (ISC_R_UNEXPECTEDEND);
 166
 167         algorithm = sr.base[3];
 168         RETERR(mem_tobuffer(target, sr.base, 4));
 169         isc_region_consume(&sr, 4);
 170         isc_buffer_forward(source, 4);
 171
 172         if (algorithm == DNS_KEYALG_PRIVATEDNS) {
 173                 dns_name_t name;
 174                 dns_decompress_setmethods(dctx, DNS_COMPRESS_NONE);
 175                 dns_name_init(&name, NULL);
 176                 RETERR(dns_name_fromwire(&name, source, dctx, options, target));
 177         }
 178         isc_buffer_activeregion(source, &sr);
 179         isc_buffer_forward(source, sr.length);
 180         return (mem_tobuffer(target, sr.base, sr.length));
 181 }
 182
 183 static inline isc_result_t
 184 towire_dnskey(ARGS_TOWIRE) {
 185         isc_region_t sr;
 186
 187         REQUIRE(rdata->type == 48);
 188         REQUIRE(rdata->length != 0);
 189
 190         UNUSED(cctx);
 191
 192         dns_rdata_toregion(rdata, &sr);
 193         return (mem_tobuffer(target, sr.base, sr.length));
 194 }
 195
 196 static inline int
 197 compare_dnskey(ARGS_COMPARE) {
 198         isc_region_t r1;
 199         isc_region_t r2;
 200
 201         REQUIRE(rdata1->type == rdata2->type);
 202         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 203         REQUIRE(rdata1->type == 48);
 204         REQUIRE(rdata1->length != 0);
 205         REQUIRE(rdata2->length != 0);
 206
 207         dns_rdata_toregion(rdata1, &r1);
 208         dns_rdata_toregion(rdata2, &r2);
 209         return (isc_region_compare(&r1, &r2));
 210 }
 211
 212 static inline isc_result_t
 213 fromstruct_dnskey(ARGS_FROMSTRUCT) {
 214         dns_rdata_dnskey_t *dnskey = source;
 215
 216         REQUIRE(type == 48);
 217         REQUIRE(source != NULL);
 218         REQUIRE(dnskey->common.rdtype == type);
 219         REQUIRE(dnskey->common.rdclass == rdclass);
 220
 221         UNUSED(type);
 222         UNUSED(rdclass);
 223
 224         /* Flags */
 225         RETERR(uint16_tobuffer(dnskey->flags, target));
 226
 227         /* Protocol */
 228         RETERR(uint8_tobuffer(dnskey->protocol, target));
 229
 230         /* Algorithm */
 231         RETERR(uint8_tobuffer(dnskey->algorithm, target));
 232
 233         /* Data */
 234         return (mem_tobuffer(target, dnskey->data, dnskey->datalen));
 235 }
 236
 237 static inline isc_result_t
 238 tostruct_dnskey(ARGS_TOSTRUCT) {
 239         dns_rdata_dnskey_t *dnskey = target;
 240         isc_region_t sr;
 241
 242         REQUIRE(rdata->type == 48);
 243         REQUIRE(target != NULL);
 244         REQUIRE(rdata->length != 0);
 245
 246         dnskey->common.rdclass = rdata->rdclass;
 247         dnskey->common.rdtype = rdata->type;
 248         ISC_LINK_INIT(&dnskey->common, link);
 249
 250         dns_rdata_toregion(rdata, &sr);
 251
 252         /* Flags */
 253         if (sr.length < 2)
 254                 return (ISC_R_UNEXPECTEDEND);
 255         dnskey->flags = uint16_fromregion(&sr);
 256         isc_region_consume(&sr, 2);
 257
 258         /* Protocol */
 259         if (sr.length < 1)
 260                 return (ISC_R_UNEXPECTEDEND);
 261         dnskey->protocol = uint8_fromregion(&sr);
 262         isc_region_consume(&sr, 1);
 263
 264         /* Algorithm */
 265         if (sr.length < 1)
 266                 return (ISC_R_UNEXPECTEDEND);
 267         dnskey->algorithm = uint8_fromregion(&sr);
 268         isc_region_consume(&sr, 1);
 269
 270         /* Data */
 271         dnskey->datalen = sr.length;
 272         dnskey->data = mem_maybedup(mctx, sr.base, dnskey->datalen);
 273         if (dnskey->data == NULL)
 274                 return (ISC_R_NOMEMORY);
 275
 276         dnskey->mctx = mctx;
 277         return (ISC_R_SUCCESS);
 278 }
 279
 280 static inline void
 281 freestruct_dnskey(ARGS_FREESTRUCT) {
 282         dns_rdata_dnskey_t *dnskey = (dns_rdata_dnskey_t *) source;
 283
 284         REQUIRE(source != NULL);
 285         REQUIRE(dnskey->common.rdtype == 48);
 286
 287         if (dnskey->mctx == NULL)
 288                 return;
 289
 290         if (dnskey->data != NULL)
 291                 isc_mem_free(dnskey->mctx, dnskey->data);
 292         dnskey->mctx = NULL;
 293 }
 294
 295 static inline isc_result_t
 296 additionaldata_dnskey(ARGS_ADDLDATA) {
 297         REQUIRE(rdata->type == 48);
 298
 299         UNUSED(rdata);
 300         UNUSED(add);
 301         UNUSED(arg);
 302
 303         return (ISC_R_SUCCESS);
 304 }
 305
 306 static inline isc_result_t
 307 digest_dnskey(ARGS_DIGEST) {
 308         isc_region_t r;
 309
 310         REQUIRE(rdata->type == 48);
 311
 312         dns_rdata_toregion(rdata, &r);
 313
 314         return ((digest)(arg, &r));
 315 }
 316
 317 static inline isc_boolean_t
 318 checkowner_dnskey(ARGS_CHECKOWNER) {
 319
 320         REQUIRE(type == 48);
 321
 322         UNUSED(name);
 323         UNUSED(type);
 324         UNUSED(rdclass);
 325         UNUSED(wildcard);
 326
 327         return (ISC_TRUE);
 328 }
 329
 330 static inline isc_boolean_t
 331 checknames_dnskey(ARGS_CHECKNAMES) {
 332
 333         REQUIRE(rdata->type == 48);
 334
 335         UNUSED(rdata);
 336         UNUSED(owner);
 337         UNUSED(bad);
 338
 339         return (ISC_TRUE);
 340 }
 341
 342 static inline int
 343 casecompare_dnskey(ARGS_COMPARE) {
 344
 345         /*
 346          * Treat ALG 253 (private DNS) subtype name case sensistively.
 347          */
 348         return (compare_dnskey(rdata1, rdata2));
 349 }
 350
 351 #endif  /* RDATA_GENERIC_DNSKEY_48_C */