]>
Commit | Line | Data |
---|---|---|
1 | /* tasn_fre.c */ | |
2 | /* | |
3 | * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project | |
4 | * 2000. | |
5 | */ | |
6 | /* ==================================================================== | |
7 | * Copyright (c) 2000 The OpenSSL Project. All rights reserved. | |
8 | * | |
9 | * Redistribution and use in source and binary forms, with or without | |
10 | * modification, are permitted provided that the following conditions | |
11 | * are met: | |
12 | * | |
13 | * 1. Redistributions of source code must retain the above copyright | |
14 | * notice, this list of conditions and the following disclaimer. | |
15 | * | |
16 | * 2. Redistributions in binary form must reproduce the above copyright | |
17 | * notice, this list of conditions and the following disclaimer in | |
18 | * the documentation and/or other materials provided with the | |
19 | * distribution. | |
20 | * | |
21 | * 3. All advertising materials mentioning features or use of this | |
22 | * software must display the following acknowledgment: | |
23 | * "This product includes software developed by the OpenSSL Project | |
24 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
25 | * | |
26 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
27 | * endorse or promote products derived from this software without | |
28 | * prior written permission. For written permission, please contact | |
29 | * licensing@OpenSSL.org. | |
30 | * | |
31 | * 5. Products derived from this software may not be called "OpenSSL" | |
32 | * nor may "OpenSSL" appear in their names without prior written | |
33 | * permission of the OpenSSL Project. | |
34 | * | |
35 | * 6. Redistributions of any form whatsoever must retain the following | |
36 | * acknowledgment: | |
37 | * "This product includes software developed by the OpenSSL Project | |
38 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
39 | * | |
40 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
41 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
42 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
43 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
44 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
45 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
46 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
47 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
48 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
49 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
50 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
51 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
52 | * ==================================================================== | |
53 | * | |
54 | * This product includes cryptographic software written by Eric Young | |
55 | * (eay@cryptsoft.com). This product includes software written by Tim | |
56 | * Hudson (tjh@cryptsoft.com). | |
57 | * | |
58 | */ | |
59 | ||
60 | #include <stddef.h> | |
61 | #include <openssl/asn1.h> | |
62 | #include <openssl/asn1t.h> | |
63 | #include <openssl/objects.h> | |
64 | ||
65 | static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, | |
66 | int combine); | |
67 | ||
68 | /* Free up an ASN1 structure */ | |
69 | ||
70 | void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it) | |
71 | { | |
72 | asn1_item_combine_free(&val, it, 0); | |
73 | } | |
74 | ||
75 | void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
76 | { | |
77 | asn1_item_combine_free(pval, it, 0); | |
78 | } | |
79 | ||
80 | static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, | |
81 | int combine) | |
82 | { | |
83 | const ASN1_TEMPLATE *tt = NULL, *seqtt; | |
84 | const ASN1_EXTERN_FUNCS *ef; | |
85 | const ASN1_COMPAT_FUNCS *cf; | |
86 | const ASN1_AUX *aux = it->funcs; | |
87 | ASN1_aux_cb *asn1_cb; | |
88 | int i; | |
89 | if (!pval) | |
90 | return; | |
91 | if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval) | |
92 | return; | |
93 | if (aux && aux->asn1_cb) | |
94 | asn1_cb = aux->asn1_cb; | |
95 | else | |
96 | asn1_cb = 0; | |
97 | ||
98 | switch (it->itype) { | |
99 | ||
100 | case ASN1_ITYPE_PRIMITIVE: | |
101 | if (it->templates) | |
102 | ASN1_template_free(pval, it->templates); | |
103 | else | |
104 | ASN1_primitive_free(pval, it); | |
105 | break; | |
106 | ||
107 | case ASN1_ITYPE_MSTRING: | |
108 | ASN1_primitive_free(pval, it); | |
109 | break; | |
110 | ||
111 | case ASN1_ITYPE_CHOICE: | |
112 | if (asn1_cb) { | |
113 | i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL); | |
114 | if (i == 2) | |
115 | return; | |
116 | } | |
117 | i = asn1_get_choice_selector(pval, it); | |
118 | if ((i >= 0) && (i < it->tcount)) { | |
119 | ASN1_VALUE **pchval; | |
120 | tt = it->templates + i; | |
121 | pchval = asn1_get_field_ptr(pval, tt); | |
122 | ASN1_template_free(pchval, tt); | |
123 | } | |
124 | if (asn1_cb) | |
125 | asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL); | |
126 | if (!combine) { | |
127 | OPENSSL_free(*pval); | |
128 | *pval = NULL; | |
129 | } | |
130 | break; | |
131 | ||
132 | case ASN1_ITYPE_COMPAT: | |
133 | cf = it->funcs; | |
134 | if (cf && cf->asn1_free) | |
135 | cf->asn1_free(*pval); | |
136 | break; | |
137 | ||
138 | case ASN1_ITYPE_EXTERN: | |
139 | ef = it->funcs; | |
140 | if (ef && ef->asn1_ex_free) | |
141 | ef->asn1_ex_free(pval, it); | |
142 | break; | |
143 | ||
144 | case ASN1_ITYPE_NDEF_SEQUENCE: | |
145 | case ASN1_ITYPE_SEQUENCE: | |
146 | if (asn1_do_lock(pval, -1, it) > 0) | |
147 | return; | |
148 | if (asn1_cb) { | |
149 | i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL); | |
150 | if (i == 2) | |
151 | return; | |
152 | } | |
153 | asn1_enc_free(pval, it); | |
154 | /* | |
155 | * If we free up as normal we will invalidate any ANY DEFINED BY | |
156 | * field and we wont be able to determine the type of the field it | |
157 | * defines. So free up in reverse order. | |
158 | */ | |
159 | tt = it->templates + it->tcount - 1; | |
160 | for (i = 0; i < it->tcount; tt--, i++) { | |
161 | ASN1_VALUE **pseqval; | |
162 | seqtt = asn1_do_adb(pval, tt, 0); | |
163 | if (!seqtt) | |
164 | continue; | |
165 | pseqval = asn1_get_field_ptr(pval, seqtt); | |
166 | ASN1_template_free(pseqval, seqtt); | |
167 | } | |
168 | if (asn1_cb) | |
169 | asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL); | |
170 | if (!combine) { | |
171 | OPENSSL_free(*pval); | |
172 | *pval = NULL; | |
173 | } | |
174 | break; | |
175 | } | |
176 | } | |
177 | ||
178 | void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) | |
179 | { | |
180 | int i; | |
181 | if (tt->flags & ASN1_TFLG_SK_MASK) { | |
182 | STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval; | |
183 | for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) { | |
184 | ASN1_VALUE *vtmp; | |
185 | vtmp = sk_ASN1_VALUE_value(sk, i); | |
186 | asn1_item_combine_free(&vtmp, ASN1_ITEM_ptr(tt->item), 0); | |
187 | } | |
188 | sk_ASN1_VALUE_free(sk); | |
189 | *pval = NULL; | |
190 | } else | |
191 | asn1_item_combine_free(pval, ASN1_ITEM_ptr(tt->item), | |
192 | tt->flags & ASN1_TFLG_COMBINE); | |
193 | } | |
194 | ||
195 | void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
196 | { | |
197 | int utype; | |
198 | if (it) { | |
199 | const ASN1_PRIMITIVE_FUNCS *pf; | |
200 | pf = it->funcs; | |
201 | if (pf && pf->prim_free) { | |
202 | pf->prim_free(pval, it); | |
203 | return; | |
204 | } | |
205 | } | |
206 | /* Special case: if 'it' is NULL free contents of ASN1_TYPE */ | |
207 | if (!it) { | |
208 | ASN1_TYPE *typ = (ASN1_TYPE *)*pval; | |
209 | utype = typ->type; | |
210 | pval = &typ->value.asn1_value; | |
211 | if (!*pval) | |
212 | return; | |
213 | } else if (it->itype == ASN1_ITYPE_MSTRING) { | |
214 | utype = -1; | |
215 | if (!*pval) | |
216 | return; | |
217 | } else { | |
218 | utype = it->utype; | |
219 | if ((utype != V_ASN1_BOOLEAN) && !*pval) | |
220 | return; | |
221 | } | |
222 | ||
223 | switch (utype) { | |
224 | case V_ASN1_OBJECT: | |
225 | ASN1_OBJECT_free((ASN1_OBJECT *)*pval); | |
226 | break; | |
227 | ||
228 | case V_ASN1_BOOLEAN: | |
229 | if (it) | |
230 | *(ASN1_BOOLEAN *)pval = it->size; | |
231 | else | |
232 | *(ASN1_BOOLEAN *)pval = -1; | |
233 | return; | |
234 | ||
235 | case V_ASN1_NULL: | |
236 | break; | |
237 | ||
238 | case V_ASN1_ANY: | |
239 | ASN1_primitive_free(pval, NULL); | |
240 | OPENSSL_free(*pval); | |
241 | break; | |
242 | ||
243 | default: | |
244 | ASN1_STRING_free((ASN1_STRING *)*pval); | |
245 | *pval = NULL; | |
246 | break; | |
247 | } | |
248 | *pval = NULL; | |
249 | } |