1 /* $NetBSD: key.c,v 1.8 2023/01/25 21:43:30 christos Exp $ */
2
3 /*
4 * Copyright (C) Internet Systems Consortium, Inc. ("ISC")
5 *
6 * SPDX-License-Identifier: MPL-2.0
7 *
8 * This Source Code Form is subject to the terms of the Mozilla Public
9 * License, v. 2.0. If a copy of the MPL was not distributed with this
10 * file, you can obtain one at https://mozilla.org/MPL/2.0/.
11 *
12 * See the COPYRIGHT file distributed with this work for additional
13 * information regarding copyright ownership.
14 */
15
16 #include <inttypes.h>
17 #include <stdbool.h>
18 #include <stddef.h>
19 #include <stdlib.h>
20
21 #include <isc/region.h>
22 #include <isc/util.h>
23
24 #include <dns/keyvalues.h>
25
26 #include <dst/dst.h>
27
28 #include "dst_internal.h"
29
30 uint16_t
dst_region_computeid(const isc_region_t * source)31 dst_region_computeid(const isc_region_t *source) {
32 uint32_t ac;
33 const unsigned char *p;
34 int size;
35
36 REQUIRE(source != NULL);
37 REQUIRE(source->length >= 4);
38
39 p = source->base;
40 size = source->length;
41
42 for (ac = 0; size > 1; size -= 2, p += 2) {
43 ac += ((*p) << 8) + *(p + 1);
44 }
45
46 if (size > 0) {
47 ac += ((*p) << 8);
48 }
49 ac += (ac >> 16) & 0xffff;
50
51 return ((uint16_t)(ac & 0xffff));
52 }
53
54 uint16_t
dst_region_computerid(const isc_region_t * source)55 dst_region_computerid(const isc_region_t *source) {
56 uint32_t ac;
57 const unsigned char *p;
58 int size;
59
60 REQUIRE(source != NULL);
61 REQUIRE(source->length >= 4);
62
63 p = source->base;
64 size = source->length;
65
66 ac = ((*p) << 8) + *(p + 1);
67 ac |= DNS_KEYFLAG_REVOKE;
68 for (size -= 2, p += 2; size > 1; size -= 2, p += 2) {
69 ac += ((*p) << 8) + *(p + 1);
70 }
71
72 if (size > 0) {
73 ac += ((*p) << 8);
74 }
75 ac += (ac >> 16) & 0xffff;
76
77 return ((uint16_t)(ac & 0xffff));
78 }
79
80 dns_name_t *
dst_key_name(const dst_key_t * key)81 dst_key_name(const dst_key_t *key) {
82 REQUIRE(VALID_KEY(key));
83 return (key->key_name);
84 }
85
86 unsigned int
dst_key_size(const dst_key_t * key)87 dst_key_size(const dst_key_t *key) {
88 REQUIRE(VALID_KEY(key));
89 return (key->key_size);
90 }
91
92 unsigned int
dst_key_proto(const dst_key_t * key)93 dst_key_proto(const dst_key_t *key) {
94 REQUIRE(VALID_KEY(key));
95 return (key->key_proto);
96 }
97
98 unsigned int
dst_key_alg(const dst_key_t * key)99 dst_key_alg(const dst_key_t *key) {
100 REQUIRE(VALID_KEY(key));
101 return (key->key_alg);
102 }
103
104 uint32_t
dst_key_flags(const dst_key_t * key)105 dst_key_flags(const dst_key_t *key) {
106 REQUIRE(VALID_KEY(key));
107 return (key->key_flags);
108 }
109
110 dns_keytag_t
dst_key_id(const dst_key_t * key)111 dst_key_id(const dst_key_t *key) {
112 REQUIRE(VALID_KEY(key));
113 return (key->key_id);
114 }
115
116 dns_keytag_t
dst_key_rid(const dst_key_t * key)117 dst_key_rid(const dst_key_t *key) {
118 REQUIRE(VALID_KEY(key));
119 return (key->key_rid);
120 }
121
122 dns_rdataclass_t
dst_key_class(const dst_key_t * key)123 dst_key_class(const dst_key_t *key) {
124 REQUIRE(VALID_KEY(key));
125 return (key->key_class);
126 }
127
128 bool
dst_key_iszonekey(const dst_key_t * key)129 dst_key_iszonekey(const dst_key_t *key) {
130 REQUIRE(VALID_KEY(key));
131
132 if ((key->key_flags & DNS_KEYTYPE_NOAUTH) != 0) {
133 return (false);
134 }
135 if ((key->key_flags & DNS_KEYFLAG_OWNERMASK) != DNS_KEYOWNER_ZONE) {
136 return (false);
137 }
138 if (key->key_proto != DNS_KEYPROTO_DNSSEC &&
139 key->key_proto != DNS_KEYPROTO_ANY)
140 {
141 return (false);
142 }
143 return (true);
144 }
145
146 bool
dst_key_isnullkey(const dst_key_t * key)147 dst_key_isnullkey(const dst_key_t *key) {
148 REQUIRE(VALID_KEY(key));
149
150 if ((key->key_flags & DNS_KEYFLAG_TYPEMASK) != DNS_KEYTYPE_NOKEY) {
151 return (false);
152 }
153 if ((key->key_flags & DNS_KEYFLAG_OWNERMASK) != DNS_KEYOWNER_ZONE) {
154 return (false);
155 }
156 if (key->key_proto != DNS_KEYPROTO_DNSSEC &&
157 key->key_proto != DNS_KEYPROTO_ANY)
158 {
159 return (false);
160 }
161 return (true);
162 }
163
164 void
dst_key_setbits(dst_key_t * key,uint16_t bits)165 dst_key_setbits(dst_key_t *key, uint16_t bits) {
166 unsigned int maxbits;
167 REQUIRE(VALID_KEY(key));
168 if (bits != 0) {
169 RUNTIME_CHECK(dst_key_sigsize(key, &maxbits) == ISC_R_SUCCESS);
170 maxbits *= 8;
171 REQUIRE(bits <= maxbits);
172 }
173 key->key_bits = bits;
174 }
175
176 uint16_t
dst_key_getbits(const dst_key_t * key)177 dst_key_getbits(const dst_key_t *key) {
178 REQUIRE(VALID_KEY(key));
179 return (key->key_bits);
180 }
181
182 void
dst_key_setttl(dst_key_t * key,dns_ttl_t ttl)183 dst_key_setttl(dst_key_t *key, dns_ttl_t ttl) {
184 REQUIRE(VALID_KEY(key));
185 key->key_ttl = ttl;
186 }
187
188 dns_ttl_t
dst_key_getttl(const dst_key_t * key)189 dst_key_getttl(const dst_key_t *key) {
190 REQUIRE(VALID_KEY(key));
191 return (key->key_ttl);
192 }
193
194 /*! \file */
195