contrib/bind9/lib/dns/rdata/generic/dlv_32769.c

   1 /*
   2  * Copyright (C) 2004, 2006, 2007, 2009, 2010  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: dlv_32769.c,v 1.10 2010-12-23 23:47:08 tbox Exp $ */
  18
  19 /* draft-ietf-dnsext-delegation-signer-05.txt */
  20
  21 #ifndef RDATA_GENERIC_DLV_32769_C
  22 #define RDATA_GENERIC_DLV_32769_C
  23
  24 #define RRTYPE_DLV_ATTRIBUTES 0
  25
  26 #include <isc/sha1.h>
  27 #include <isc/sha2.h>
  28
  29 #include <dns/ds.h>
  30
  31
  32 static inline isc_result_t
  33 fromtext_dlv(ARGS_FROMTEXT) {
  34         isc_token_t token;
  35         unsigned char c;
  36         int length;
  37
  38         REQUIRE(type == 32769);
  39
  40         UNUSED(type);
  41         UNUSED(rdclass);
  42         UNUSED(origin);
  43         UNUSED(options);
  44         UNUSED(callbacks);
  45
  46         /*
  47          * Key tag.
  48          */
  49         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
  50                                       ISC_FALSE));
  51         if (token.value.as_ulong > 0xffffU)
  52                 RETTOK(ISC_R_RANGE);
  53         RETERR(uint16_tobuffer(token.value.as_ulong, target));
  54
  55         /*
  56          * Algorithm.
  57          */
  58         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
  59                                       ISC_FALSE));
  60         if (token.value.as_ulong > 0xffU)
  61                 RETTOK(ISC_R_RANGE);
  62         RETERR(uint8_tobuffer(token.value.as_ulong, target));
  63
  64         /*
  65          * Digest type.
  66          */
  67         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
  68                                       ISC_FALSE));
  69         if (token.value.as_ulong > 0xffU)
  70                 RETTOK(ISC_R_RANGE);
  71         RETERR(uint8_tobuffer(token.value.as_ulong, target));
  72         c = (unsigned char) token.value.as_ulong;
  73
  74         /*
  75          * Digest.
  76          */
  77         switch (c) {
  78         case DNS_DSDIGEST_SHA1:
  79                 length = ISC_SHA1_DIGESTLENGTH;
  80                 break;
  81         case DNS_DSDIGEST_SHA256:
  82                 length = ISC_SHA256_DIGESTLENGTH;
  83                 break;
  84         case DNS_DSDIGEST_GOST:
  85                 length = ISC_GOST_DIGESTLENGTH;
  86                 break;
  87         default:
  88                 length = -1;
  89                 break;
  90         }
  91         return (isc_hex_tobuffer(lexer, target, -1));
  92 }
  93
  94 static inline isc_result_t
  95 totext_dlv(ARGS_TOTEXT) {
  96         isc_region_t sr;
  97         char buf[sizeof("64000 ")];
  98         unsigned int n;
  99
 100         REQUIRE(rdata->type == 32769);
 101         REQUIRE(rdata->length != 0);
 102
 103         UNUSED(tctx);
 104
 105         dns_rdata_toregion(rdata, &sr);
 106
 107         /*
 108          * Key tag.
 109          */
 110         n = uint16_fromregion(&sr);
 111         isc_region_consume(&sr, 2);
 112         sprintf(buf, "%u ", n);
 113         RETERR(str_totext(buf, target));
 114
 115         /*
 116          * Algorithm.
 117          */
 118         n = uint8_fromregion(&sr);
 119         isc_region_consume(&sr, 1);
 120         sprintf(buf, "%u ", n);
 121         RETERR(str_totext(buf, target));
 122
 123         /*
 124          * Digest type.
 125          */
 126         n = uint8_fromregion(&sr);
 127         isc_region_consume(&sr, 1);
 128         sprintf(buf, "%u", n);
 129         RETERR(str_totext(buf, target));
 130
 131         /*
 132          * Digest.
 133          */
 134         if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
 135                 RETERR(str_totext(" (", target));
 136         RETERR(str_totext(tctx->linebreak, target));
 137         RETERR(isc_hex_totext(&sr, tctx->width - 2, tctx->linebreak, target));
 138         if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
 139                 RETERR(str_totext(" )", target));
 140         return (ISC_R_SUCCESS);
 141 }
 142
 143 static inline isc_result_t
 144 fromwire_dlv(ARGS_FROMWIRE) {
 145         isc_region_t sr;
 146
 147         REQUIRE(type == 32769);
 148
 149         UNUSED(type);
 150         UNUSED(rdclass);
 151         UNUSED(dctx);
 152         UNUSED(options);
 153
 154         isc_buffer_activeregion(source, &sr);
 155
 156         /*
 157          * Check digest lengths if we know them.
 158          */
 159         if (sr.length < 4 ||
 160             (sr.base[3] == DNS_DSDIGEST_SHA1 &&
 161              sr.length < 4 + ISC_SHA1_DIGESTLENGTH) ||
 162             (sr.base[3] == DNS_DSDIGEST_SHA256 &&
 163              sr.length < 4 + ISC_SHA256_DIGESTLENGTH) ||
 164             (sr.base[3] == DNS_DSDIGEST_GOST &&
 165              sr.length < 4 + ISC_GOST_DIGESTLENGTH))
 166                 return (ISC_R_UNEXPECTEDEND);
 167
 168         /*
 169          * Only copy digest lengths if we know them.
 170          * If there is extra data dns_rdata_fromwire() will
 171          * detect that.
 172          */
 173         if (sr.base[3] == DNS_DSDIGEST_SHA1)
 174                 sr.length = 4 + ISC_SHA1_DIGESTLENGTH;
 175         else if (sr.base[3] == DNS_DSDIGEST_SHA256)
 176                 sr.length = 4 + ISC_SHA256_DIGESTLENGTH;
 177         else if (sr.base[3] == DNS_DSDIGEST_GOST)
 178                 sr.length = 4 + ISC_GOST_DIGESTLENGTH;
 179
 180         isc_buffer_forward(source, sr.length);
 181         return (mem_tobuffer(target, sr.base, sr.length));
 182 }
 183
 184 static inline isc_result_t
 185 towire_dlv(ARGS_TOWIRE) {
 186         isc_region_t sr;
 187
 188         REQUIRE(rdata->type == 32769);
 189         REQUIRE(rdata->length != 0);
 190
 191         UNUSED(cctx);
 192
 193         dns_rdata_toregion(rdata, &sr);
 194         return (mem_tobuffer(target, sr.base, sr.length));
 195 }
 196
 197 static inline int
 198 compare_dlv(ARGS_COMPARE) {
 199         isc_region_t r1;
 200         isc_region_t r2;
 201
 202         REQUIRE(rdata1->type == rdata2->type);
 203         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 204         REQUIRE(rdata1->type == 32769);
 205         REQUIRE(rdata1->length != 0);
 206         REQUIRE(rdata2->length != 0);
 207
 208         dns_rdata_toregion(rdata1, &r1);
 209         dns_rdata_toregion(rdata2, &r2);
 210         return (isc_region_compare(&r1, &r2));
 211 }
 212
 213 static inline isc_result_t
 214 fromstruct_dlv(ARGS_FROMSTRUCT) {
 215         dns_rdata_dlv_t *dlv = source;
 216
 217         REQUIRE(type == 32769);
 218         REQUIRE(source != NULL);
 219         REQUIRE(dlv->common.rdtype == type);
 220         REQUIRE(dlv->common.rdclass == rdclass);
 221         switch (dlv->digest_type) {
 222         case DNS_DSDIGEST_SHA1:
 223                 REQUIRE(dlv->length == ISC_SHA1_DIGESTLENGTH);
 224                 break;
 225         case DNS_DSDIGEST_SHA256:
 226                 REQUIRE(dlv->length == ISC_SHA256_DIGESTLENGTH);
 227                 break;
 228         case DNS_DSDIGEST_GOST:
 229                 REQUIRE(dlv->length == ISC_GOST_DIGESTLENGTH);
 230                 break;
 231         }
 232
 233         UNUSED(type);
 234         UNUSED(rdclass);
 235
 236         RETERR(uint16_tobuffer(dlv->key_tag, target));
 237         RETERR(uint8_tobuffer(dlv->algorithm, target));
 238         RETERR(uint8_tobuffer(dlv->digest_type, target));
 239
 240         return (mem_tobuffer(target, dlv->digest, dlv->length));
 241 }
 242
 243 static inline isc_result_t
 244 tostruct_dlv(ARGS_TOSTRUCT) {
 245         dns_rdata_dlv_t *dlv = target;
 246         isc_region_t region;
 247
 248         REQUIRE(rdata->type == 32769);
 249         REQUIRE(target != NULL);
 250         REQUIRE(rdata->length != 0);
 251
 252         dlv->common.rdclass = rdata->rdclass;
 253         dlv->common.rdtype = rdata->type;
 254         ISC_LINK_INIT(&dlv->common, link);
 255
 256         dns_rdata_toregion(rdata, &region);
 257
 258         dlv->key_tag = uint16_fromregion(&region);
 259         isc_region_consume(&region, 2);
 260         dlv->algorithm = uint8_fromregion(&region);
 261         isc_region_consume(&region, 1);
 262         dlv->digest_type = uint8_fromregion(&region);
 263         isc_region_consume(&region, 1);
 264         dlv->length = region.length;
 265
 266         dlv->digest = mem_maybedup(mctx, region.base, region.length);
 267         if (dlv->digest == NULL)
 268                 return (ISC_R_NOMEMORY);
 269
 270         dlv->mctx = mctx;
 271         return (ISC_R_SUCCESS);
 272 }
 273
 274 static inline void
 275 freestruct_dlv(ARGS_FREESTRUCT) {
 276         dns_rdata_dlv_t *dlv = source;
 277
 278         REQUIRE(dlv != NULL);
 279         REQUIRE(dlv->common.rdtype == 32769);
 280
 281         if (dlv->mctx == NULL)
 282                 return;
 283
 284         if (dlv->digest != NULL)
 285                 isc_mem_free(dlv->mctx, dlv->digest);
 286         dlv->mctx = NULL;
 287 }
 288
 289 static inline isc_result_t
 290 additionaldata_dlv(ARGS_ADDLDATA) {
 291         REQUIRE(rdata->type == 32769);
 292
 293         UNUSED(rdata);
 294         UNUSED(add);
 295         UNUSED(arg);
 296
 297         return (ISC_R_SUCCESS);
 298 }
 299
 300 static inline isc_result_t
 301 digest_dlv(ARGS_DIGEST) {
 302         isc_region_t r;
 303
 304         REQUIRE(rdata->type == 32769);
 305
 306         dns_rdata_toregion(rdata, &r);
 307
 308         return ((digest)(arg, &r));
 309 }
 310
 311 static inline isc_boolean_t
 312 checkowner_dlv(ARGS_CHECKOWNER) {
 313
 314         REQUIRE(type == 32769);
 315
 316         UNUSED(name);
 317         UNUSED(type);
 318         UNUSED(rdclass);
 319         UNUSED(wildcard);
 320
 321         return (ISC_TRUE);
 322 }
 323
 324 static inline isc_boolean_t
 325 checknames_dlv(ARGS_CHECKNAMES) {
 326
 327         REQUIRE(rdata->type == 32769);
 328
 329         UNUSED(rdata);
 330         UNUSED(owner);
 331         UNUSED(bad);
 332
 333         return (ISC_TRUE);
 334 }
 335
 336 static inline int
 337 casecompare_dlv(ARGS_COMPARE) {
 338         return (compare_dlv(rdata1, rdata2));
 339 }
 340
 341 #endif  /* RDATA_GENERIC_DLV_32769_C */