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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 c
ombine); | |
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 c
ombine) | |
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, NULL); | |
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, NULL); | |
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, NULL); | |
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, NULL); | |
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 } | |
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