Some more prototype fixes.
[openssl.git] / crypto / asn1 / tasn_new.c
1 /* tasn_new.c */
2 /* Written by Dr Stephen N Henson (shenson@bigfoot.com) 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
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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
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42  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
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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/objects.h>
63 #include <openssl/err.h>
64 #include <openssl/asn1t.h>
65 #include <string.h>
66
67 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine);
68 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
69 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
70 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
71
72 ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
73 {
74         ASN1_VALUE *ret = NULL;
75         if(ASN1_item_ex_new(&ret, it) > 0) return ret;
76         return NULL;
77 }
78
79 /* Allocate an ASN1 structure */
80
81 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
82 {
83         return asn1_item_ex_combine_new(pval, it, 0);
84 }
85
86 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine)
87 {
88         const ASN1_TEMPLATE *tt = NULL;
89         const ASN1_COMPAT_FUNCS *cf;
90         const ASN1_EXTERN_FUNCS *ef;
91         const ASN1_AUX *aux = it->funcs;
92         ASN1_aux_cb *asn1_cb;
93         ASN1_VALUE **pseqval;
94         int i;
95         if(aux && aux->asn1_cb) asn1_cb = aux->asn1_cb;
96         else asn1_cb = 0;
97
98         if(!combine) *pval = NULL;
99
100 #ifdef CRYPTO_MDEBUG
101         if(it->sname) CRYPTO_push_info(it->sname);
102 #endif
103
104         switch(it->itype) {
105
106                 case ASN1_ITYPE_EXTERN:
107                 ef = it->funcs;
108                 if(ef && ef->asn1_ex_new) {
109                         if(!ef->asn1_ex_new(pval, it))
110                                 goto memerr;
111                 }
112                 break;
113
114                 case ASN1_ITYPE_COMPAT:
115                 cf = it->funcs;
116                 if(cf && cf->asn1_new) {
117                         *pval = cf->asn1_new();
118                         if(!*pval) goto memerr;
119                 }
120                 break;
121
122                 case ASN1_ITYPE_PRIMITIVE:
123                 if(it->templates) {
124                         if(!ASN1_template_new(pval, it->templates))
125                                 goto memerr;
126                 } else {
127                         if(!ASN1_primitive_new(pval, it))
128                                 goto memerr;
129                 }
130                 break;
131
132                 case ASN1_ITYPE_MSTRING:
133                 if(!ASN1_primitive_new(pval, it))
134                                 goto memerr;
135                 break;
136
137                 case ASN1_ITYPE_CHOICE:
138                 if(asn1_cb) {
139                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
140                         if(!i) goto auxerr;
141                         if(i==2) {
142 #ifdef CRYPTO_MDEBUG
143                                 if(it->sname) CRYPTO_pop_info();
144 #endif
145                                 return 1;
146                         }
147                 }
148                 if(!combine) {
149                         *pval = OPENSSL_malloc(it->size);
150                         if(!*pval) goto memerr;
151                         memset(*pval, 0, it->size);
152                 }
153                 asn1_set_choice_selector(pval, -1, it);
154                 if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
155                                 goto auxerr;
156                 break;
157
158                 case ASN1_ITYPE_SEQUENCE:
159                 if(asn1_cb) {
160                         i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
161                         if(!i) goto auxerr;
162                         if(i==2) {
163 #ifdef CRYPTO_MDEBUG
164                                 if(it->sname) CRYPTO_pop_info();
165 #endif
166                                 return 1;
167                         }
168                 }
169                 if(!combine) {
170                         *pval = OPENSSL_malloc(it->size);
171                         if(!*pval) goto memerr;
172                         memset(*pval, 0, it->size);
173                         asn1_do_lock(pval, 0, it);
174                         asn1_enc_init(pval, it);
175                 }
176                 for(i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
177                         pseqval = asn1_get_field_ptr(pval, tt);
178                         if(!ASN1_template_new(pseqval, tt)) goto memerr;
179                 }
180                 if(asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
181                                 goto auxerr;
182                 break;
183         }
184 #ifdef CRYPTO_MDEBUG
185         if(it->sname) CRYPTO_pop_info();
186 #endif
187         return 1;
188
189         memerr:
190         ASN1err(ASN1_F_ASN1_ITEM_NEW, ERR_R_MALLOC_FAILURE);
191 #ifdef CRYPTO_MDEBUG
192         if(it->sname) CRYPTO_pop_info();
193 #endif
194         return 0;
195
196         auxerr:
197         ASN1err(ASN1_F_ASN1_ITEM_NEW, ASN1_R_AUX_ERROR);
198         ASN1_item_ex_free(pval, it);
199 #ifdef CRYPTO_MDEBUG
200         if(it->sname) CRYPTO_pop_info();
201 #endif
202         return 0;
203
204 }
205
206 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
207 {
208         const ASN1_EXTERN_FUNCS *ef;
209
210         switch(it->itype) {
211
212                 case ASN1_ITYPE_EXTERN:
213                 ef = it->funcs;
214                 if(ef && ef->asn1_ex_clear) 
215                         ef->asn1_ex_clear(pval, it);
216                 else *pval = NULL;
217                 break;
218
219
220                 case ASN1_ITYPE_PRIMITIVE:
221                 if(it->templates) 
222                         asn1_template_clear(pval, it->templates);
223                 else
224                         asn1_primitive_clear(pval, it);
225                 break;
226
227                 case ASN1_ITYPE_MSTRING:
228                 asn1_primitive_clear(pval, it);
229                 break;
230
231                 case ASN1_ITYPE_COMPAT:
232                 case ASN1_ITYPE_CHOICE:
233                 case ASN1_ITYPE_SEQUENCE:
234                 *pval = NULL;
235                 break;
236         }
237 }
238
239
240 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
241 {
242         const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
243         int ret;
244         if(tt->flags & ASN1_TFLG_OPTIONAL) {
245                 asn1_template_clear(pval, tt);
246                 return 1;
247         }
248         /* If ANY DEFINED BY nothing to do */
249
250         if(tt->flags & ASN1_TFLG_ADB_MASK) {
251                 *pval = NULL;
252                 return 1;
253         }
254 #ifdef CRYPTO_MDEBUG
255         if(tt->field_name) CRYPTO_push_info(tt->field_name);
256 #endif
257         /* If SET OF or SEQUENCE OF, its a STACK */
258         if(tt->flags & ASN1_TFLG_SK_MASK) {
259                 STACK_OF(ASN1_VALUE) *skval;
260                 skval = sk_ASN1_VALUE_new_null();
261                 if(!skval) {
262                         ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
263                         ret = 0;
264                         goto done;
265                 }
266                 *pval = (ASN1_VALUE *)skval;
267                 ret = 1;
268                 goto done;
269         }
270         /* Otherwise pass it back to the item routine */
271         ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
272         done:
273 #ifdef CRYPTO_MDEBUG
274         if(it->sname) CRYPTO_pop_info();
275 #endif
276         return ret;
277 }
278
279 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
280 {
281         /* If ADB or STACK just NULL the field */
282         if(tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK)) 
283                 *pval = NULL;
284         else
285                 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
286 }
287
288
289 /* NB: could probably combine most of the real XXX_new() behaviour and junk all the old
290  * functions.
291  */
292
293 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
294 {
295         ASN1_TYPE *typ;
296         int utype;
297         const ASN1_PRIMITIVE_FUNCS *pf;
298         pf = it->funcs;
299         if(pf && pf->prim_new) return pf->prim_new(pval, it);
300         if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
301         else utype = it->utype;
302         switch(utype) {
303                 case V_ASN1_OBJECT:
304                 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
305                 return 1;
306
307                 case V_ASN1_BOOLEAN:
308                 *(ASN1_BOOLEAN *)pval = it->size;
309                 return 1;
310
311                 case V_ASN1_NULL:
312                 *pval = (ASN1_VALUE *)1;
313                 return 1;
314
315                 case V_ASN1_ANY:
316                 typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
317                 if(!typ) return 0;
318                 typ->value.ptr = NULL;
319                 typ->type = -1;
320                 *pval = (ASN1_VALUE *)typ;
321                 break;
322
323                 default:
324                 *pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
325                 break;
326         }
327         if(*pval) return 1;
328         return 0;
329 }
330
331 void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
332 {
333         int utype;
334         const ASN1_PRIMITIVE_FUNCS *pf;
335         pf = it->funcs;
336         if(pf) {
337                 if(pf->prim_clear)
338                         pf->prim_clear(pval, it);
339                 else 
340                         *pval = NULL;
341                 return;
342         }
343         if(!it || (it->itype == ASN1_ITYPE_MSTRING)) utype = -1;
344         else utype = it->utype;
345         if(utype == V_ASN1_BOOLEAN)
346                 *(ASN1_BOOLEAN *)pval = it->size;
347         else *pval = NULL;
348 }