contrib/bind-9.5.2/lib/dns/rdata/generic/ds_43.c

   1 /*
   2  * Copyright (C) 2004, 2005, 2007  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2002  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
  10  * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
  11  * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
  12  * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
  13  * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
  14  * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  15  * PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 /* $Id: ds_43.c,v 1.12 2007/06/18 23:47:43 tbox Exp $ */
  19
  20 /* draft-ietf-dnsext-delegation-signer-05.txt */
  21
  22 #ifndef RDATA_GENERIC_DS_43_C
  23 #define RDATA_GENERIC_DS_43_C
  24
  25 #define RRTYPE_DS_ATTRIBUTES \
  26         (DNS_RDATATYPEATTR_DNSSEC|DNS_RDATATYPEATTR_ATPARENT)
  27
  28 #include <isc/sha1.h>
  29 #include <isc/sha2.h>
  30
  31 #include <dns/ds.h>
  32
  33 static inline isc_result_t
  34 fromtext_ds(ARGS_FROMTEXT) {
  35         isc_token_t token;
  36         unsigned char c;
  37         int length;
  38
  39         REQUIRE(type == 43);
  40
  41         UNUSED(type);
  42         UNUSED(rdclass);
  43         UNUSED(origin);
  44         UNUSED(options);
  45         UNUSED(callbacks);
  46
  47         /*
  48          * Key tag.
  49          */
  50         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_number,
  51                                       ISC_FALSE));
  52         if (token.value.as_ulong > 0xffffU)
  53                 RETTOK(ISC_R_RANGE);
  54         RETERR(uint16_tobuffer(token.value.as_ulong, target));
  55
  56         /*
  57          * Algorithm.
  58          */
  59         RETERR(isc_lex_getmastertoken(lexer, &token, isc_tokentype_string,
  60                                       ISC_FALSE));
  61         RETTOK(dns_secalg_fromtext(&c, &token.value.as_textregion));
  62         RETERR(mem_tobuffer(target, &c, 1));
  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         if (c == DNS_DSDIGEST_SHA1)
  78                 length = ISC_SHA1_DIGESTLENGTH;
  79         else if (c == DNS_DSDIGEST_SHA256)
  80                 length = ISC_SHA256_DIGESTLENGTH;
  81         else
  82                 length = -1;
  83         return (isc_hex_tobuffer(lexer, target, length));
  84 }
  85
  86 static inline isc_result_t
  87 totext_ds(ARGS_TOTEXT) {
  88         isc_region_t sr;
  89         char buf[sizeof("64000 ")];
  90         unsigned int n;
  91
  92         REQUIRE(rdata->type == 43);
  93         REQUIRE(rdata->length != 0);
  94
  95         UNUSED(tctx);
  96
  97         dns_rdata_toregion(rdata, &sr);
  98
  99         /*
 100          * Key tag.
 101          */
 102         n = uint16_fromregion(&sr);
 103         isc_region_consume(&sr, 2);
 104         sprintf(buf, "%u ", n);
 105         RETERR(str_totext(buf, target));
 106
 107         /*
 108          * Algorithm.
 109          */
 110         n = uint8_fromregion(&sr);
 111         isc_region_consume(&sr, 1);
 112         sprintf(buf, "%u ", n);
 113         RETERR(str_totext(buf, target));
 114
 115         /*
 116          * Digest type.
 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.
 125          */
 126         if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
 127                 RETERR(str_totext(" (", target));
 128         RETERR(str_totext(tctx->linebreak, target));
 129         RETERR(isc_hex_totext(&sr, tctx->width - 2, tctx->linebreak, target));
 130         if ((tctx->flags & DNS_STYLEFLAG_MULTILINE) != 0)
 131                 RETERR(str_totext(" )", target));
 132         return (ISC_R_SUCCESS);
 133 }
 134
 135 static inline isc_result_t
 136 fromwire_ds(ARGS_FROMWIRE) {
 137         isc_region_t sr;
 138
 139         REQUIRE(type == 43);
 140
 141         UNUSED(type);
 142         UNUSED(rdclass);
 143         UNUSED(dctx);
 144         UNUSED(options);
 145
 146         isc_buffer_activeregion(source, &sr);
 147
 148         /*
 149          * Check digest lengths if we know them.
 150          */
 151         if (sr.length < 4 ||
 152             (sr.base[3] == DNS_DSDIGEST_SHA1 &&
 153              sr.length < 4 + ISC_SHA1_DIGESTLENGTH) ||
 154             (sr.base[3] == DNS_DSDIGEST_SHA256 &&
 155              sr.length < 4 + ISC_SHA256_DIGESTLENGTH))
 156                 return (ISC_R_UNEXPECTEDEND);
 157
 158         /*
 159          * Only copy digest lengths if we know them.
 160          * If there is extra data dns_rdata_fromwire() will
 161          * detect that.
 162          */
 163         if (sr.base[3] == DNS_DSDIGEST_SHA1)
 164                 sr.length = 4 + ISC_SHA1_DIGESTLENGTH;
 165         else if (sr.base[3] == DNS_DSDIGEST_SHA256)
 166                 sr.length = 4 + ISC_SHA256_DIGESTLENGTH;
 167
 168         isc_buffer_forward(source, sr.length);
 169         return (mem_tobuffer(target, sr.base, sr.length));
 170 }
 171
 172 static inline isc_result_t
 173 towire_ds(ARGS_TOWIRE) {
 174         isc_region_t sr;
 175
 176         REQUIRE(rdata->type == 43);
 177         REQUIRE(rdata->length != 0);
 178
 179         UNUSED(cctx);
 180
 181         dns_rdata_toregion(rdata, &sr);
 182         return (mem_tobuffer(target, sr.base, sr.length));
 183 }
 184
 185 static inline int
 186 compare_ds(ARGS_COMPARE) {
 187         isc_region_t r1;
 188         isc_region_t r2;
 189
 190         REQUIRE(rdata1->type == rdata2->type);
 191         REQUIRE(rdata1->rdclass == rdata2->rdclass);
 192         REQUIRE(rdata1->type == 43);
 193         REQUIRE(rdata1->length != 0);
 194         REQUIRE(rdata2->length != 0);
 195
 196         dns_rdata_toregion(rdata1, &r1);
 197         dns_rdata_toregion(rdata2, &r2);
 198         return (isc_region_compare(&r1, &r2));
 199 }
 200
 201 static inline isc_result_t
 202 fromstruct_ds(ARGS_FROMSTRUCT) {
 203         dns_rdata_ds_t *ds = source;
 204
 205         REQUIRE(type == 43);
 206         REQUIRE(source != NULL);
 207         REQUIRE(ds->common.rdtype == type);
 208         REQUIRE(ds->common.rdclass == rdclass);
 209         switch (ds->digest_type) {
 210         case DNS_DSDIGEST_SHA1:
 211                 REQUIRE(ds->length == ISC_SHA1_DIGESTLENGTH);
 212                 break;
 213         case DNS_DSDIGEST_SHA256:
 214                 REQUIRE(ds->length == ISC_SHA256_DIGESTLENGTH);
 215                 break;
 216         }
 217
 218         UNUSED(type);
 219         UNUSED(rdclass);
 220
 221         RETERR(uint16_tobuffer(ds->key_tag, target));
 222         RETERR(uint8_tobuffer(ds->algorithm, target));
 223         RETERR(uint8_tobuffer(ds->digest_type, target));
 224
 225         return (mem_tobuffer(target, ds->digest, ds->length));
 226 }
 227
 228 static inline isc_result_t
 229 tostruct_ds(ARGS_TOSTRUCT) {
 230         dns_rdata_ds_t *ds = target;
 231         isc_region_t region;
 232
 233         REQUIRE(rdata->type == 43);
 234         REQUIRE(target != NULL);
 235         REQUIRE(rdata->length != 0);
 236
 237         ds->common.rdclass = rdata->rdclass;
 238         ds->common.rdtype = rdata->type;
 239         ISC_LINK_INIT(&ds->common, link);
 240
 241         dns_rdata_toregion(rdata, &region);
 242
 243         ds->key_tag = uint16_fromregion(&region);
 244         isc_region_consume(&region, 2);
 245         ds->algorithm = uint8_fromregion(&region);
 246         isc_region_consume(&region, 1);
 247         ds->digest_type = uint8_fromregion(&region);
 248         isc_region_consume(&region, 1);
 249         ds->length = region.length;
 250
 251         ds->digest = mem_maybedup(mctx, region.base, region.length);
 252         if (ds->digest == NULL)
 253                 return (ISC_R_NOMEMORY);
 254
 255         ds->mctx = mctx;
 256         return (ISC_R_SUCCESS);
 257 }
 258
 259 static inline void
 260 freestruct_ds(ARGS_FREESTRUCT) {
 261         dns_rdata_ds_t *ds = source;
 262
 263         REQUIRE(ds != NULL);
 264         REQUIRE(ds->common.rdtype == 43);
 265
 266         if (ds->mctx == NULL)
 267                 return;
 268
 269         if (ds->digest != NULL)
 270                 isc_mem_free(ds->mctx, ds->digest);
 271         ds->mctx = NULL;
 272 }
 273
 274 static inline isc_result_t
 275 additionaldata_ds(ARGS_ADDLDATA) {
 276         REQUIRE(rdata->type == 43);
 277
 278         UNUSED(rdata);
 279         UNUSED(add);
 280         UNUSED(arg);
 281
 282         return (ISC_R_SUCCESS);
 283 }
 284
 285 static inline isc_result_t
 286 digest_ds(ARGS_DIGEST) {
 287         isc_region_t r;
 288
 289         REQUIRE(rdata->type == 43);
 290
 291         dns_rdata_toregion(rdata, &r);
 292
 293         return ((digest)(arg, &r));
 294 }
 295
 296 static inline isc_boolean_t
 297 checkowner_ds(ARGS_CHECKOWNER) {
 298
 299         REQUIRE(type == 43);
 300
 301         UNUSED(name);
 302         UNUSED(type);
 303         UNUSED(rdclass);
 304         UNUSED(wildcard);
 305
 306         return (ISC_TRUE);
 307 }
 308
 309 static inline isc_boolean_t
 310 checknames_ds(ARGS_CHECKNAMES) {
 311
 312         REQUIRE(rdata->type == 43);
 313
 314         UNUSED(rdata);
 315         UNUSED(owner);
 316         UNUSED(bad);
 317
 318         return (ISC_TRUE);
 319 }
 320
 321 #endif  /* RDATA_GENERIC_DS_43_C */