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
|
/*
* Copyright 2000-2016 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 <stddef.h>
#include <openssl/asn1.h>
#include <openssl/asn1t.h>
#include <openssl/objects.h>
#include "asn1_locl.h"
/* Free up an ASN1 structure */
void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it)
{
asn1_item_embed_free(&val, it, 0);
}
void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
{
asn1_item_embed_free(pval, it, 0);
}
void asn1_item_embed_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int embed)
{
const ASN1_TEMPLATE *tt = NULL, *seqtt;
const ASN1_EXTERN_FUNCS *ef;
const ASN1_AUX *aux = it->funcs;
ASN1_aux_cb *asn1_cb;
int i;
if (!pval)
return;
if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
return;
if (aux && aux->asn1_cb)
asn1_cb = aux->asn1_cb;
else
asn1_cb = 0;
switch (it->itype) {
case ASN1_ITYPE_PRIMITIVE:
if (it->templates)
asn1_template_free(pval, it->templates);
else
asn1_primitive_free(pval, it, embed);
break;
case ASN1_ITYPE_MSTRING:
asn1_primitive_free(pval, it, embed);
break;
case ASN1_ITYPE_CHOICE:
if (asn1_cb) {
i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
if (i == 2)
return;
}
i = asn1_get_choice_selector(pval, it);
if ((i >= 0) && (i < it->tcount)) {
ASN1_VALUE **pchval;
tt = it->templates + i;
pchval = asn1_get_field_ptr(pval, tt);
asn1_template_free(pchval, tt);
}
if (asn1_cb)
asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
if (embed == 0) {
OPENSSL_free(*pval);
*pval = NULL;
}
break;
case ASN1_ITYPE_EXTERN:
ef = it->funcs;
if (ef && ef->asn1_ex_free)
ef->asn1_ex_free(pval, it);
break;
case ASN1_ITYPE_NDEF_SEQUENCE:
case ASN1_ITYPE_SEQUENCE:
if (asn1_do_lock(pval, -1, it) != 0) /* if error or ref-counter > 0 */
return;
if (asn1_cb) {
i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
if (i == 2)
return;
}
asn1_enc_free(pval, it);
/*
* If we free up as normal we will invalidate any ANY DEFINED BY
* field and we won't be able to determine the type of the field it
* defines. So free up in reverse order.
*/
tt = it->templates + it->tcount;
for (i = 0; i < it->tcount; i++) {
ASN1_VALUE **pseqval;
tt--;
seqtt = asn1_do_adb(pval, tt, 0);
if (!seqtt)
continue;
pseqval = asn1_get_field_ptr(pval, seqtt);
asn1_template_free(pseqval, seqtt);
}
if (asn1_cb)
asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
if (embed == 0) {
OPENSSL_free(*pval);
*pval = NULL;
}
break;
}
}
void asn1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
{
int embed = tt->flags & ASN1_TFLG_EMBED;
ASN1_VALUE *tval;
if (embed) {
tval = (ASN1_VALUE *)pval;
pval = &tval;
}
if (tt->flags & ASN1_TFLG_SK_MASK) {
STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
int i;
for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) {
ASN1_VALUE *vtmp = sk_ASN1_VALUE_value(sk, i);
asn1_item_embed_free(&vtmp, ASN1_ITEM_ptr(tt->item), embed);
}
sk_ASN1_VALUE_free(sk);
*pval = NULL;
} else {
asn1_item_embed_free(pval, ASN1_ITEM_ptr(tt->item), embed);
}
}
void asn1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int embed)
{
int utype;
/* Special case: if 'it' is a primitive with a free_func, use that. */
if (it) {
const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
if (embed) {
if (pf && pf->prim_clear) {
pf->prim_clear(pval, it);
return;
}
} else if (pf && pf->prim_free) {
pf->prim_free(pval, it);
return;
}
}
/* Special case: if 'it' is NULL, free contents of ASN1_TYPE */
if (!it) {
ASN1_TYPE *typ = (ASN1_TYPE *)*pval;
utype = typ->type;
pval = &typ->value.asn1_value;
if (!*pval)
return;
} else if (it->itype == ASN1_ITYPE_MSTRING) {
utype = -1;
if (!*pval)
return;
} else {
utype = it->utype;
if ((utype != V_ASN1_BOOLEAN) && !*pval)
return;
}
switch (utype) {
case V_ASN1_OBJECT:
ASN1_OBJECT_free((ASN1_OBJECT *)*pval);
break;
case V_ASN1_BOOLEAN:
if (it)
*(ASN1_BOOLEAN *)pval = it->size;
else
*(ASN1_BOOLEAN *)pval = -1;
return;
case V_ASN1_NULL:
break;
case V_ASN1_ANY:
asn1_primitive_free(pval, NULL, 0);
OPENSSL_free(*pval);
break;
default:
asn1_string_embed_free((ASN1_STRING *)*pval, embed);
break;
}
*pval = NULL;
}
|
