external/bsd/bind/dist/lib/dns/ds.c

   1 /*      $NetBSD: ds.c,v 1.7 2014/12/10 04:37:58 christos Exp $  */
   2
   3 /*
   4  * Copyright (C) 2004-2007, 2010, 2012, 2014  Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (C) 2002, 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: ds.c,v 1.13 2010/12/23 23:47:08 tbox Exp  */
  21
  22 /*! \file */
  23
  24 #include <config.h>
  25
  26 #include <string.h>
  27
  28 #include <isc/buffer.h>
  29 #include <isc/region.h>
  30 #include <isc/sha1.h>
  31 #include <isc/sha2.h>
  32 #include <isc/util.h>
  33
  34 #include <dns/ds.h>
  35 #include <dns/fixedname.h>
  36 #include <dns/name.h>
  37 #include <dns/rdata.h>
  38 #include <dns/rdatastruct.h>
  39 #include <dns/result.h>
  40
  41 #include <dst/dst.h>
  42
  43 #if defined(HAVE_OPENSSL_GOST) || defined(HAVE_PKCS11_GOST)
  44 #include "dst_gost.h"
  45 #endif
  46
  47 isc_result_t
  48 dns_ds_buildrdata(dns_name_t *owner, dns_rdata_t *key,
  49                   unsigned int digest_type, unsigned char *buffer,
  50                   dns_rdata_t *rdata)
  51 {
  52         dns_fixedname_t fname;
  53         dns_name_t *name;
  54         unsigned char digest[ISC_SHA384_DIGESTLENGTH];
  55         isc_region_t r;
  56         isc_buffer_t b;
  57         dns_rdata_ds_t ds;
  58         isc_sha1_t sha1;
  59         isc_sha256_t sha256;
  60         isc_sha384_t sha384;
  61 #if defined(HAVE_OPENSSL_GOST) || defined(HAVE_PKCS11_GOST)
  62         isc_gost_t gost;
  63 #endif
  64
  65         REQUIRE(key != NULL);
  66         REQUIRE(key->type == dns_rdatatype_dnskey);
  67
  68         if (!dst_ds_digest_supported(digest_type))
  69                 return (ISC_R_NOTIMPLEMENTED);
  70
  71         dns_fixedname_init(&fname);
  72         name = dns_fixedname_name(&fname);
  73         (void)dns_name_downcase(owner, name, NULL);
  74
  75         memset(buffer, 0, DNS_DS_BUFFERSIZE);
  76         isc_buffer_init(&b, buffer, DNS_DS_BUFFERSIZE);
  77
  78         switch (digest_type) {
  79         case DNS_DSDIGEST_SHA1:
  80                 isc_sha1_init(&sha1);
  81                 dns_name_toregion(name, &r);
  82                 isc_sha1_update(&sha1, r.base, r.length);
  83                 dns_rdata_toregion(key, &r);
  84                 INSIST(r.length >= 4);
  85                 isc_sha1_update(&sha1, r.base, r.length);
  86                 isc_sha1_final(&sha1, digest);
  87                 break;
  88
  89 #if defined(HAVE_OPENSSL_GOST) || defined(HAVE_PKCS11_GOST)
  90 #define RETERR(x) do {                                  \
  91         isc_result_t ret = (x);                         \
  92         if (ret != ISC_R_SUCCESS) {                     \
  93                 isc_gost_invalidate(&gost);             \
  94                 return (ret);                           \
  95         }                                               \
  96 } while (/*CONSTCOND*/0)
  97
  98         case DNS_DSDIGEST_GOST:
  99                 RETERR(isc_gost_init(&gost));
 100                 dns_name_toregion(name, &r);
 101                 RETERR(isc_gost_update(&gost, r.base, r.length));
 102                 dns_rdata_toregion(key, &r);
 103                 INSIST(r.length >= 4);
 104                 RETERR(isc_gost_update(&gost, r.base, r.length));
 105                 RETERR(isc_gost_final(&gost, digest));
 106                 break;
 107 #endif
 108
 109         case DNS_DSDIGEST_SHA384:
 110                 isc_sha384_init(&sha384);
 111                 dns_name_toregion(name, &r);
 112                 isc_sha384_update(&sha384, r.base, r.length);
 113                 dns_rdata_toregion(key, &r);
 114                 INSIST(r.length >= 4);
 115                 isc_sha384_update(&sha384, r.base, r.length);
 116                 isc_sha384_final(digest, &sha384);
 117                 break;
 118
 119         case DNS_DSDIGEST_SHA256:
 120         default:
 121                 isc_sha256_init(&sha256);
 122                 dns_name_toregion(name, &r);
 123                 isc_sha256_update(&sha256, r.base, r.length);
 124                 dns_rdata_toregion(key, &r);
 125                 INSIST(r.length >= 4);
 126                 isc_sha256_update(&sha256, r.base, r.length);
 127                 isc_sha256_final(digest, &sha256);
 128                 break;
 129         }
 130
 131         ds.mctx = NULL;
 132         ds.common.rdclass = key->rdclass;
 133         ds.common.rdtype = dns_rdatatype_ds;
 134         ds.algorithm = r.base[3];
 135         ds.key_tag = dst_region_computeid(&r, ds.algorithm);
 136         ds.digest_type = digest_type;
 137         switch (digest_type) {
 138         case DNS_DSDIGEST_SHA1:
 139                 ds.length = ISC_SHA1_DIGESTLENGTH;
 140                 break;
 141
 142 #if defined(HAVE_OPENSSL_GOST) || defined(HAVE_PKCS11_GOST)
 143         case DNS_DSDIGEST_GOST:
 144                 ds.length = ISC_GOST_DIGESTLENGTH;
 145                 break;
 146 #endif
 147
 148         case DNS_DSDIGEST_SHA384:
 149                 ds.length = ISC_SHA384_DIGESTLENGTH;
 150                 break;
 151
 152         case DNS_DSDIGEST_SHA256:
 153         default:
 154                 ds.length = ISC_SHA256_DIGESTLENGTH;
 155                 break;
 156         }
 157         ds.digest = digest;
 158
 159         return (dns_rdata_fromstruct(rdata, key->rdclass, dns_rdatatype_ds,
 160                                      &ds, &b));
 161 }