1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
|
/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: key.c,v 1.7 2020/02/23 23:40:21 jsg Exp $ */
#include <stddef.h>
#include <stdint.h>
#include <isc/region.h>
#include <isc/util.h>
#include <dst/dst.h>
#include "dst_internal.h"
uint16_t
dst_region_computeid(const isc_region_t *source, unsigned int alg) {
uint32_t ac;
const unsigned char *p;
int size;
REQUIRE(source != NULL);
REQUIRE(source->length >= 4);
p = source->base;
size = source->length;
if (alg == DST_ALG_RSAMD5)
return ((p[size - 3] << 8) + p[size - 2]);
for (ac = 0; size > 1; size -= 2, p += 2)
ac += ((*p) << 8) + *(p + 1);
if (size > 0)
ac += ((*p) << 8);
ac += (ac >> 16) & 0xffff;
return ((uint16_t)(ac & 0xffff));
}
unsigned int
dst_key_size(const dst_key_t *key) {
return (key->key_size);
}
unsigned int
dst_key_alg(const dst_key_t *key) {
return (key->key_alg);
}
void
dst_key_setbits(dst_key_t *key, uint16_t bits) {
unsigned int maxbits;
if (bits != 0) {
RUNTIME_CHECK(dst_key_sigsize(key, &maxbits) == ISC_R_SUCCESS);
maxbits *= 8;
REQUIRE(bits <= maxbits);
}
key->key_bits = bits;
}
uint16_t
dst_key_getbits(const dst_key_t *key) {
return (key->key_bits);
}
/*! \file */
|
