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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
|
/*
* Copyright 2006-2018 The OpenSSL Project Authors. All Rights Reserved.
*
* Licensed under the OpenSSL license (the "License"). You may not use
* this file except in compliance with the License. You can obtain a copy
* in the file LICENSE in the source distribution or at
* https://www.openssl.org/source/license.html
*/
#include "e_os.h"
#include "eng_local.h"
#include <openssl/evp.h>
#include "crypto/asn1.h"
/*
* If this symbol is defined then ENGINE_get_pkey_asn1_meth_engine(), the
* function that is used by EVP to hook in pkey_asn1_meth code and cache
* defaults (etc), will display brief debugging summaries to stderr with the
* 'nid'.
*/
/* #define ENGINE_PKEY_ASN1_METH_DEBUG */
static ENGINE_TABLE *pkey_asn1_meth_table = NULL;
void ENGINE_unregister_pkey_asn1_meths(ENGINE *e)
{
engine_table_unregister(&pkey_asn1_meth_table, e);
}
static void engine_unregister_all_pkey_asn1_meths(void)
{
engine_table_cleanup(&pkey_asn1_meth_table);
}
int ENGINE_register_pkey_asn1_meths(ENGINE *e)
{
if (e->pkey_asn1_meths) {
const int *nids;
int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
if (num_nids > 0)
return engine_table_register(&pkey_asn1_meth_table,
engine_unregister_all_pkey_asn1_meths,
e, nids, num_nids, 0);
}
return 1;
}
void ENGINE_register_all_pkey_asn1_meths(void)
{
ENGINE *e;
for (e = ENGINE_get_first(); e; e = ENGINE_get_next(e))
ENGINE_register_pkey_asn1_meths(e);
}
int ENGINE_set_default_pkey_asn1_meths(ENGINE *e)
{
if (e->pkey_asn1_meths) {
const int *nids;
int num_nids = e->pkey_asn1_meths(e, NULL, &nids, 0);
if (num_nids > 0)
return engine_table_register(&pkey_asn1_meth_table,
engine_unregister_all_pkey_asn1_meths,
e, nids, num_nids, 1);
}
return 1;
}
/*
* Exposed API function to get a functional reference from the implementation
* table (ie. try to get a functional reference from the tabled structural
* references) for a given pkey_asn1_meth 'nid'
*/
ENGINE *ENGINE_get_pkey_asn1_meth_engine(int nid)
{
return engine_table_select(&pkey_asn1_meth_table, nid);
}
/*
* Obtains a pkey_asn1_meth implementation from an ENGINE functional
* reference
*/
const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth(ENGINE *e, int nid)
{
EVP_PKEY_ASN1_METHOD *ret;
ENGINE_PKEY_ASN1_METHS_PTR fn = ENGINE_get_pkey_asn1_meths(e);
if (!fn || !fn(e, &ret, NULL, nid)) {
ENGINEerr(ENGINE_F_ENGINE_GET_PKEY_ASN1_METH,
ENGINE_R_UNIMPLEMENTED_PUBLIC_KEY_METHOD);
return NULL;
}
return ret;
}
/* Gets the pkey_asn1_meth callback from an ENGINE structure */
ENGINE_PKEY_ASN1_METHS_PTR ENGINE_get_pkey_asn1_meths(const ENGINE *e)
{
return e->pkey_asn1_meths;
}
/* Sets the pkey_asn1_meth callback in an ENGINE structure */
int ENGINE_set_pkey_asn1_meths(ENGINE *e, ENGINE_PKEY_ASN1_METHS_PTR f)
{
e->pkey_asn1_meths = f;
return 1;
}
/*
* Internal function to free up EVP_PKEY_ASN1_METHOD structures before an
* ENGINE is destroyed
*/
void engine_pkey_asn1_meths_free(ENGINE *e)
{
int i;
EVP_PKEY_ASN1_METHOD *pkm;
if (e->pkey_asn1_meths) {
const int *pknids;
int npknids;
npknids = e->pkey_asn1_meths(e, NULL, &pknids, 0);
for (i = 0; i < npknids; i++) {
if (e->pkey_asn1_meths(e, &pkm, NULL, pknids[i])) {
EVP_PKEY_asn1_free(pkm);
}
}
}
}
/*
* Find a method based on a string. This does a linear search through all
* implemented algorithms. This is OK in practice because only a small number
* of algorithms are likely to be implemented in an engine and it is not used
* for speed critical operations.
*/
const EVP_PKEY_ASN1_METHOD *ENGINE_get_pkey_asn1_meth_str(ENGINE *e,
const char *str,
int len)
{
int i, nidcount;
const int *nids;
EVP_PKEY_ASN1_METHOD *ameth;
if (!e->pkey_asn1_meths)
return NULL;
if (len == -1)
len = strlen(str);
nidcount = e->pkey_asn1_meths(e, NULL, &nids, 0);
for (i = 0; i < nidcount; i++) {
e->pkey_asn1_meths(e, &ameth, NULL, nids[i]);
if (ameth != NULL
&& ((int)strlen(ameth->pem_str) == len)
&& strncasecmp(ameth->pem_str, str, len) == 0)
return ameth;
}
return NULL;
}
typedef struct {
ENGINE *e;
const EVP_PKEY_ASN1_METHOD *ameth;
const char *str;
int len;
} ENGINE_FIND_STR;
static void look_str_cb(int nid, STACK_OF(ENGINE) *sk, ENGINE *def, void *arg)
{
ENGINE_FIND_STR *lk = arg;
int i;
if (lk->ameth)
return;
for (i = 0; i < sk_ENGINE_num(sk); i++) {
ENGINE *e = sk_ENGINE_value(sk, i);
EVP_PKEY_ASN1_METHOD *ameth;
e->pkey_asn1_meths(e, &ameth, NULL, nid);
if (ameth != NULL
&& ((int)strlen(ameth->pem_str) == lk->len)
&& strncasecmp(ameth->pem_str, lk->str, lk->len) == 0) {
lk->e = e;
lk->ameth = ameth;
return;
}
}
}
const EVP_PKEY_ASN1_METHOD *ENGINE_pkey_asn1_find_str(ENGINE **pe,
const char *str,
int len)
{
ENGINE_FIND_STR fstr;
fstr.e = NULL;
fstr.ameth = NULL;
fstr.str = str;
fstr.len = len;
if (!RUN_ONCE(&engine_lock_init, do_engine_lock_init)) {
ENGINEerr(ENGINE_F_ENGINE_PKEY_ASN1_FIND_STR, ERR_R_MALLOC_FAILURE);
return NULL;
}
CRYPTO_THREAD_write_lock(global_engine_lock);
engine_table_doall(pkey_asn1_meth_table, look_str_cb, &fstr);
/* If found obtain a structural reference to engine */
if (fstr.e) {
fstr.e->struct_ref++;
engine_ref_debug(fstr.e, 0, 1);
}
*pe = fstr.e;
CRYPTO_THREAD_unlock(global_engine_lock);
return fstr.ameth;
}
|
