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3e575651 SL |
1 | /* tasn_fre.c */ |
2 | /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL | |
3 | * project 2000. | |
4 | */ | |
5 | /* ==================================================================== | |
6 | * Copyright (c) 2000 The OpenSSL Project. All rights reserved. | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * | |
15 | * 2. Redistributions in binary form must reproduce the above copyright | |
16 | * notice, this list of conditions and the following disclaimer in | |
17 | * the documentation and/or other materials provided with the | |
18 | * distribution. | |
19 | * | |
20 | * 3. All advertising materials mentioning features or use of this | |
21 | * software must display the following acknowledgment: | |
22 | * "This product includes software developed by the OpenSSL Project | |
23 | * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)" | |
24 | * | |
25 | * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to | |
26 | * endorse or promote products derived from this software without | |
27 | * prior written permission. For written permission, please contact | |
28 | * licensing@OpenSSL.org. | |
29 | * | |
30 | * 5. Products derived from this software may not be called "OpenSSL" | |
31 | * nor may "OpenSSL" appear in their names without prior written | |
32 | * permission of the OpenSSL Project. | |
33 | * | |
34 | * 6. Redistributions of any form whatsoever must retain the following | |
35 | * acknowledgment: | |
36 | * "This product includes software developed by the OpenSSL Project | |
37 | * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)" | |
38 | * | |
39 | * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY | |
40 | * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
41 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
42 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR | |
43 | * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
44 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
45 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
46 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
47 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
48 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | |
49 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED | |
50 | * OF THE POSSIBILITY OF SUCH DAMAGE. | |
51 | * ==================================================================== | |
52 | * | |
53 | * This product includes cryptographic software written by Eric Young | |
54 | * (eay@cryptsoft.com). This product includes software written by Tim | |
55 | * Hudson (tjh@cryptsoft.com). | |
56 | * | |
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, int combine); | |
66 | ||
67 | /* Free up an ASN1 structure */ | |
68 | ||
69 | void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it) | |
70 | { | |
71 | asn1_item_combine_free(&val, it, 0); | |
72 | } | |
73 | ||
74 | void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
75 | { | |
76 | asn1_item_combine_free(pval, it, 0); | |
77 | } | |
78 | ||
79 | static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine) | |
80 | { | |
81 | const ASN1_TEMPLATE *tt = NULL, *seqtt; | |
82 | const ASN1_EXTERN_FUNCS *ef; | |
83 | const ASN1_COMPAT_FUNCS *cf; | |
84 | const ASN1_AUX *aux = it->funcs; | |
85 | ASN1_aux_cb *asn1_cb; | |
86 | int i; | |
87 | if (!pval) | |
88 | return; | |
89 | if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval) | |
90 | return; | |
91 | if (aux && aux->asn1_cb) | |
92 | asn1_cb = aux->asn1_cb; | |
93 | else | |
94 | asn1_cb = 0; | |
95 | ||
96 | switch(it->itype) | |
97 | { | |
98 | ||
99 | case ASN1_ITYPE_PRIMITIVE: | |
100 | if (it->templates) | |
101 | ASN1_template_free(pval, it->templates); | |
102 | else | |
103 | ASN1_primitive_free(pval, it); | |
104 | break; | |
105 | ||
106 | case ASN1_ITYPE_MSTRING: | |
107 | ASN1_primitive_free(pval, it); | |
108 | break; | |
109 | ||
110 | case ASN1_ITYPE_CHOICE: | |
111 | if (asn1_cb) | |
112 | { | |
113 | i = asn1_cb(ASN1_OP_FREE_PRE, pval, it); | |
114 | if (i == 2) | |
115 | return; | |
116 | } | |
117 | i = asn1_get_choice_selector(pval, it); | |
118 | if ((i >= 0) && (i < it->tcount)) | |
119 | { | |
120 | ASN1_VALUE **pchval; | |
121 | tt = it->templates + i; | |
122 | pchval = asn1_get_field_ptr(pval, tt); | |
123 | ASN1_template_free(pchval, tt); | |
124 | } | |
125 | if (asn1_cb) | |
126 | asn1_cb(ASN1_OP_FREE_POST, pval, it); | |
127 | if (!combine) | |
128 | { | |
129 | OPENSSL_free(*pval); | |
130 | *pval = NULL; | |
131 | } | |
132 | break; | |
133 | ||
134 | case ASN1_ITYPE_COMPAT: | |
135 | cf = it->funcs; | |
136 | if (cf && cf->asn1_free) | |
137 | cf->asn1_free(*pval); | |
138 | break; | |
139 | ||
140 | case ASN1_ITYPE_EXTERN: | |
141 | ef = it->funcs; | |
142 | if (ef && ef->asn1_ex_free) | |
143 | ef->asn1_ex_free(pval, it); | |
144 | break; | |
145 | ||
146 | case ASN1_ITYPE_NDEF_SEQUENCE: | |
147 | case ASN1_ITYPE_SEQUENCE: | |
148 | if (asn1_do_lock(pval, -1, it) > 0) | |
149 | return; | |
150 | if (asn1_cb) | |
151 | { | |
152 | i = asn1_cb(ASN1_OP_FREE_PRE, pval, it); | |
153 | if (i == 2) | |
154 | return; | |
155 | } | |
156 | asn1_enc_free(pval, it); | |
157 | /* If we free up as normal we will invalidate any | |
158 | * ANY DEFINED BY field and we wont be able to | |
159 | * determine the type of the field it defines. So | |
160 | * free up in reverse order. | |
161 | */ | |
162 | tt = it->templates + it->tcount - 1; | |
163 | for (i = 0; i < it->tcount; tt--, i++) | |
164 | { | |
165 | ASN1_VALUE **pseqval; | |
166 | seqtt = asn1_do_adb(pval, tt, 0); | |
167 | if (!seqtt) | |
168 | continue; | |
169 | pseqval = asn1_get_field_ptr(pval, seqtt); | |
170 | ASN1_template_free(pseqval, seqtt); | |
171 | } | |
172 | if (asn1_cb) | |
173 | asn1_cb(ASN1_OP_FREE_POST, pval, it); | |
174 | if (!combine) | |
175 | { | |
176 | OPENSSL_free(*pval); | |
177 | *pval = NULL; | |
178 | } | |
179 | break; | |
180 | } | |
181 | } | |
182 | ||
183 | void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) | |
184 | { | |
185 | int i; | |
186 | if (tt->flags & ASN1_TFLG_SK_MASK) | |
187 | { | |
188 | STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval; | |
189 | for (i = 0; i < sk_ASN1_VALUE_num(sk); i++) | |
190 | { | |
191 | ASN1_VALUE *vtmp; | |
192 | vtmp = sk_ASN1_VALUE_value(sk, i); | |
193 | asn1_item_combine_free(&vtmp, ASN1_ITEM_ptr(tt->item), | |
194 | 0); | |
195 | } | |
196 | sk_ASN1_VALUE_free(sk); | |
197 | *pval = NULL; | |
198 | } | |
199 | else | |
200 | asn1_item_combine_free(pval, ASN1_ITEM_ptr(tt->item), | |
201 | tt->flags & ASN1_TFLG_COMBINE); | |
202 | } | |
203 | ||
204 | void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
205 | { | |
206 | int utype; | |
207 | if (it) | |
208 | { | |
209 | const ASN1_PRIMITIVE_FUNCS *pf; | |
210 | pf = it->funcs; | |
211 | if (pf && pf->prim_free) | |
212 | { | |
213 | pf->prim_free(pval, it); | |
214 | return; | |
215 | } | |
216 | } | |
217 | /* Special case: if 'it' is NULL free contents of ASN1_TYPE */ | |
218 | if (!it) | |
219 | { | |
220 | ASN1_TYPE *typ = (ASN1_TYPE *)*pval; | |
221 | utype = typ->type; | |
222 | pval = &typ->value.asn1_value; | |
223 | if (!*pval) | |
224 | return; | |
225 | } | |
226 | else if (it->itype == ASN1_ITYPE_MSTRING) | |
227 | { | |
228 | utype = -1; | |
229 | if (!*pval) | |
230 | return; | |
231 | } | |
232 | else | |
233 | { | |
234 | utype = it->utype; | |
235 | if ((utype != V_ASN1_BOOLEAN) && !*pval) | |
236 | return; | |
237 | } | |
238 | ||
239 | switch(utype) | |
240 | { | |
241 | case V_ASN1_OBJECT: | |
242 | ASN1_OBJECT_free((ASN1_OBJECT *)*pval); | |
243 | break; | |
244 | ||
245 | case V_ASN1_BOOLEAN: | |
246 | if (it) | |
247 | *(ASN1_BOOLEAN *)pval = it->size; | |
248 | else | |
249 | *(ASN1_BOOLEAN *)pval = -1; | |
250 | return; | |
251 | ||
252 | case V_ASN1_NULL: | |
253 | break; | |
254 | ||
255 | case V_ASN1_ANY: | |
256 | ASN1_primitive_free(pval, NULL); | |
257 | OPENSSL_free(*pval); | |
258 | break; | |
259 | ||
260 | default: | |
261 | ASN1_STRING_free((ASN1_STRING *)*pval); | |
262 | *pval = NULL; | |
263 | break; | |
264 | } | |
265 | *pval = NULL; | |
266 | } |