contrib/bind-9.2.4rc7/lib/dns/sec/dst/key.c

   1 /*
   2  * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (C) 2001  Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and 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: key.c,v 1.6.2.1 2004/03/09 06:11:41 marka Exp $ */
  19
  20 #include <config.h>
  21
  22 #include <stdlib.h>
  23
  24 #include <isc/region.h>
  25 #include <isc/util.h>
  26
  27 #include <dns/keyvalues.h>
  28
  29 #include <dst/dst.h>
  30
  31 #include "dst_internal.h"
  32
  33 isc_uint16_t
  34 dst_region_computeid(const isc_region_t *source, unsigned int alg) {
  35         isc_uint32_t ac;
  36         const unsigned char *p;
  37         int size;
  38
  39         REQUIRE(source != NULL);
  40         REQUIRE(source->length >= 4);
  41
  42         p = source->base;
  43         size = source->length;
  44
  45         if (alg == DST_ALG_RSAMD5)
  46                 return ((p[size - 3] << 8) + p[size - 2]);
  47
  48         for (ac = 0; size > 1; size -= 2, p += 2)
  49                 ac += ((*p) << 8) + *(p + 1);
  50
  51         if (size > 0)
  52                 ac += ((*p) << 8);
  53         ac += (ac >> 16) & 0xffff;
  54
  55         return ((isc_uint16_t)(ac & 0xffff));
  56 }
  57
  58 dns_name_t *
  59 dst_key_name(const dst_key_t *key) {
  60         REQUIRE(VALID_KEY(key));
  61         return (key->key_name);
  62 }
  63
  64 unsigned int
  65 dst_key_size(const dst_key_t *key) {
  66         REQUIRE(VALID_KEY(key));
  67         return (key->key_size);
  68 }
  69
  70 unsigned int
  71 dst_key_proto(const dst_key_t *key) {
  72         REQUIRE(VALID_KEY(key));
  73         return (key->key_proto);
  74 }
  75
  76 unsigned int
  77 dst_key_alg(const dst_key_t *key) {
  78         REQUIRE(VALID_KEY(key));
  79         return (key->key_alg);
  80 }
  81
  82 isc_uint32_t
  83 dst_key_flags(const dst_key_t *key) {
  84         REQUIRE(VALID_KEY(key));
  85         return (key->key_flags);
  86 }
  87
  88 dns_keytag_t
  89 dst_key_id(const dst_key_t *key) {
  90         REQUIRE(VALID_KEY(key));
  91         return (key->key_id);
  92 }
  93
  94 dns_rdataclass_t
  95 dst_key_class(const dst_key_t *key) {
  96         REQUIRE(VALID_KEY(key));
  97         return (key->key_class);
  98 }
  99
 100 isc_boolean_t
 101 dst_key_iszonekey(const dst_key_t *key) {
 102         REQUIRE(VALID_KEY(key));
 103
 104         if ((key->key_flags & DNS_KEYTYPE_NOAUTH) != 0)
 105                 return (ISC_FALSE);
 106         if ((key->key_flags & DNS_KEYFLAG_OWNERMASK) != DNS_KEYOWNER_ZONE)
 107                 return (ISC_FALSE);
 108         if (key->key_proto != DNS_KEYPROTO_DNSSEC &&
 109             key->key_proto != DNS_KEYPROTO_ANY)
 110                 return (ISC_FALSE);
 111         return (ISC_TRUE);
 112 }
 113
 114 isc_boolean_t
 115 dst_key_isnullkey(const dst_key_t *key) {
 116         REQUIRE(VALID_KEY(key));
 117
 118         if ((key->key_flags & DNS_KEYFLAG_TYPEMASK) != DNS_KEYTYPE_NOKEY)
 119                 return (ISC_FALSE);
 120         if ((key->key_flags & DNS_KEYFLAG_OWNERMASK) != DNS_KEYOWNER_ZONE)
 121                 return (ISC_FALSE);
 122         if (key->key_proto != DNS_KEYPROTO_DNSSEC &&
 123             key->key_proto != DNS_KEYPROTO_ANY)
 124                 return (ISC_FALSE);
 125         return (ISC_TRUE);
 126 }