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
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
// SPDX-License-Identifier: CDDL-1.0
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or https://opensource.org/licenses/CDDL-1.0.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#include <sys/crypto/common.h>
#include <sys/crypto/impl.h>
#include <sys/crypto/sched_impl.h>
void
kcf_free_triedlist(kcf_prov_tried_t *list)
{
kcf_prov_tried_t *l;
while ((l = list) != NULL) {
list = list->pt_next;
KCF_PROV_REFRELE(l->pt_pd);
kmem_free(l, sizeof (kcf_prov_tried_t));
}
}
kcf_prov_tried_t *
kcf_insert_triedlist(kcf_prov_tried_t **list, kcf_provider_desc_t *pd,
int kmflag)
{
kcf_prov_tried_t *l;
l = kmem_alloc(sizeof (kcf_prov_tried_t), kmflag);
if (l == NULL)
return (NULL);
l->pt_pd = pd;
l->pt_next = *list;
*list = l;
return (l);
}
static boolean_t
is_in_triedlist(kcf_provider_desc_t *pd, kcf_prov_tried_t *triedl)
{
while (triedl != NULL) {
if (triedl->pt_pd == pd)
return (B_TRUE);
triedl = triedl->pt_next;
}
return (B_FALSE);
}
/*
* Return the best provider for the specified mechanism. The provider
* is held and it is the caller's responsibility to release it when done.
* The fg input argument is used as a search criterion to pick a provider.
* A provider has to support this function group to be picked.
*
* Find the least loaded provider in the list of providers. We do a linear
* search to find one. This is fine as we assume there are only a few
* number of providers in this list. If this assumption ever changes,
* we should revisit this.
*/
kcf_provider_desc_t *
kcf_get_mech_provider(crypto_mech_type_t mech_type, kcf_mech_entry_t **mepp,
int *error, kcf_prov_tried_t *triedl, crypto_func_group_t fg)
{
kcf_provider_desc_t *pd = NULL;
kcf_prov_mech_desc_t *mdesc;
kcf_ops_class_t class;
int index;
kcf_mech_entry_t *me;
const kcf_mech_entry_tab_t *me_tab;
class = KCF_MECH2CLASS(mech_type);
if ((class < KCF_FIRST_OPSCLASS) || (class > KCF_LAST_OPSCLASS)) {
*error = CRYPTO_MECHANISM_INVALID;
return (NULL);
}
me_tab = &kcf_mech_tabs_tab[class];
index = KCF_MECH2INDEX(mech_type);
if ((index < 0) || (index >= me_tab->met_size)) {
*error = CRYPTO_MECHANISM_INVALID;
return (NULL);
}
me = &((me_tab->met_tab)[index]);
if (mepp != NULL)
*mepp = me;
/* Is there a provider? */
if (pd == NULL && (mdesc = me->me_sw_prov) != NULL) {
pd = mdesc->pm_prov_desc;
if (!IS_FG_SUPPORTED(mdesc, fg) ||
!KCF_IS_PROV_USABLE(pd) ||
IS_PROVIDER_TRIED(pd, triedl))
pd = NULL;
}
if (pd == NULL) {
/*
* We do not want to report CRYPTO_MECH_NOT_SUPPORTED, when
* we are in the "fallback to the next provider" case. Rather
* we preserve the error, so that the client gets the right
* error code.
*/
if (triedl == NULL)
*error = CRYPTO_MECH_NOT_SUPPORTED;
} else
KCF_PROV_REFHOLD(pd);
return (pd);
}
|
