1 /* tasn_new.c */
2 /* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
3 * project 2000.
4 */
5 /* ====================================================================
6 * Copyright (c) 2000-2004 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/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,
68 int combine);
69 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
70 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
71 static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
72
73 ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
74 {
75 ASN1_VALUE *ret = NULL;
76 if (ASN1_item_ex_new(&ret, it) > 0)
77 return ret;
78 return NULL;
79 }
80
81 /* Allocate an ASN1 structure */
82
83 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
84 {
85 return asn1_item_ex_combine_new(pval, it, 0);
86 }
87
88 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
89 int combine)
90 {
91 const ASN1_TEMPLATE *tt = NULL;
92 const ASN1_COMPAT_FUNCS *cf;
93 const ASN1_EXTERN_FUNCS *ef;
94 const ASN1_AUX *aux = it->funcs;
95 ASN1_aux_cb *asn1_cb;
96 ASN1_VALUE **pseqval;
97 int i;
98 if (aux && aux->asn1_cb)
99 asn1_cb = aux->asn1_cb;
100 else
101 asn1_cb = 0;
102
103 if (!combine) *pval = NULL;
104
105 #ifdef CRYPTO_MDEBUG
106 if (it->sname)
107 CRYPTO_push_info(it->sname);
108 #endif
109
110 switch(it->itype)
111 {
112
113 case ASN1_ITYPE_EXTERN:
114 ef = it->funcs;
115 if (ef && ef->asn1_ex_new)
116 {
117 if (!ef->asn1_ex_new(pval, it))
118 goto memerr;
119 }
120 break;
121
122 case ASN1_ITYPE_COMPAT:
123 cf = it->funcs;
124 if (cf && cf->asn1_new) {
125 *pval = cf->asn1_new();
126 if (!*pval)
127 goto memerr;
128 }
129 break;
130
131 case ASN1_ITYPE_PRIMITIVE:
132 if (it->templates)
133 {
134 if (!ASN1_template_new(pval, it->templates))
135 goto memerr;
136 }
137 else if (!ASN1_primitive_new(pval, it))
138 goto memerr;
139 break;
140
141 case ASN1_ITYPE_MSTRING:
142 if (!ASN1_primitive_new(pval, it))
143 goto memerr;
144 break;
145
146 case ASN1_ITYPE_CHOICE:
147 if (asn1_cb)
148 {
149 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
150 if (!i)
151 goto auxerr;
152 if (i==2)
153 {
154 #ifdef CRYPTO_MDEBUG
155 if (it->sname)
156 CRYPTO_pop_info();
157 #endif
158 return 1;
159 }
160 }
161 if (!combine)
162 {
163 *pval = OPENSSL_malloc(it->size);
164 if (!*pval)
165 goto memerr;
166 memset(*pval, 0, it->size);
167 }
168 asn1_set_choice_selector(pval, -1, it);
169 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
170 goto auxerr;
171 break;
172
173 case ASN1_ITYPE_NDEF_SEQUENCE:
174 case ASN1_ITYPE_SEQUENCE:
175 if (asn1_cb)
176 {
177 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
178 if (!i)
179 goto auxerr;
180 if (i==2)
181 {
182 #ifdef CRYPTO_MDEBUG
183 if (it->sname)
184 CRYPTO_pop_info();
185 #endif
186 return 1;
187 }
188 }
189 if (!combine)
190 {
191 *pval = OPENSSL_malloc(it->size);
192 if (!*pval)
193 goto memerr;
194 memset(*pval, 0, it->size);
195 asn1_do_lock(pval, 0, it);
196 asn1_enc_init(pval, it);
197 }
198 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++)
199 {
200 pseqval = asn1_get_field_ptr(pval, tt);
201 if (!ASN1_template_new(pseqval, tt))
202 goto memerr;
203 }
204 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
205 goto auxerr;
206 break;
207 }
208 #ifdef CRYPTO_MDEBUG
209 if (it->sname) CRYPTO_pop_info();
210 #endif
211 return 1;
212
213 memerr:
214 ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE);
215 #ifdef CRYPTO_MDEBUG
216 if (it->sname) CRYPTO_pop_info();
217 #endif
218 return 0;
219
220 auxerr:
221 ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR);
222 ASN1_item_ex_free(pval, it);
223 #ifdef CRYPTO_MDEBUG
224 if (it->sname) CRYPTO_pop_info();
225 #endif
226 return 0;
227
228 }
229
230 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
231 {
232 const ASN1_EXTERN_FUNCS *ef;
233
234 switch(it->itype)
235 {
236
237 case ASN1_ITYPE_EXTERN:
238 ef = it->funcs;
239 if (ef && ef->asn1_ex_clear)
240 ef->asn1_ex_clear(pval, it);
241 else *pval = NULL;
242 break;
243
244
245 case ASN1_ITYPE_PRIMITIVE:
246 if (it->templates)
247 asn1_template_clear(pval, it->templates);
248 else
249 asn1_primitive_clear(pval, it);
250 break;
251
252 case ASN1_ITYPE_MSTRING:
253 asn1_primitive_clear(pval, it);
254 break;
255
256 case ASN1_ITYPE_COMPAT:
257 case ASN1_ITYPE_CHOICE:
258 case ASN1_ITYPE_SEQUENCE:
259 case ASN1_ITYPE_NDEF_SEQUENCE:
260 *pval = NULL;
261 break;
262 }
263 }
264
265
266 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
267 {
268 const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
269 int ret;
270 if (tt->flags & ASN1_TFLG_OPTIONAL)
271 {
272 asn1_template_clear(pval, tt);
273 return 1;
274 }
275 /* If ANY DEFINED BY nothing to do */
276
277 if (tt->flags & ASN1_TFLG_ADB_MASK)
278 {
279 *pval = NULL;
280 return 1;
281 }
282 #ifdef CRYPTO_MDEBUG
283 if (tt->field_name)
284 CRYPTO_push_info(tt->field_name);
285 #endif
286 /* If SET OF or SEQUENCE OF, its a STACK */
287 if (tt->flags & ASN1_TFLG_SK_MASK)
288 {
289 STACK_OF(ASN1_VALUE) *skval;
290 skval = sk_ASN1_VALUE_new_null();
291 if (!skval)
292 {
293 ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
294 ret = 0;
295 goto done;
296 }
297 *pval = (ASN1_VALUE *)skval;
298 ret = 1;
299 goto done;
300 }
301 /* Otherwise pass it back to the item routine */
302 ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
303 done:
304 #ifdef CRYPTO_MDEBUG
305 if (it->sname)
306 CRYPTO_pop_info();
307 #endif
308 return ret;
309 }
310
311 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
312 {
313 /* If ADB or STACK just NULL the field */
314 if (tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
315 *pval = NULL;
316 else
317 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
318 }
319
320
321 /* NB: could probably combine most of the real XXX_new() behaviour and junk
322 * all the old functions.
323 */
324
325 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
326 {
327 ASN1_TYPE *typ;
328 ASN1_STRING *str;
329 int utype;
330
331 if (it && it->funcs)
332 {
333 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
334 if (pf->prim_new)
335 return pf->prim_new(pval, it);
336 }
337
338 if (!it || (it->itype == ASN1_ITYPE_MSTRING))
339 utype = -1;
340 else
341 utype = it->utype;
342 switch(utype)
343 {
344 case V_ASN1_OBJECT:
345 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
346 return 1;
347
348 case V_ASN1_BOOLEAN:
349 *(ASN1_BOOLEAN *)pval = it->size;
350 return 1;
351
352 case V_ASN1_NULL:
353 *pval = (ASN1_VALUE *)1;
354 return 1;
355
356 case V_ASN1_ANY:
357 typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
358 if (!typ)
359 return 0;
360 typ->value.ptr = NULL;
361 typ->type = -1;
362 *pval = (ASN1_VALUE *)typ;
363 break;
364
365 default:
366 str = ASN1_STRING_type_new(utype);
367 if (it->itype == ASN1_ITYPE_MSTRING && str)
368 str->flags |= ASN1_STRING_FLAG_MSTRING;
369 *pval = (ASN1_VALUE *)str;
370 break;
371 }
372 if (*pval)
373 return 1;
374 return 0;
375 }
376
377 static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
378 {
379 int utype;
380 if (it && it->funcs)
381 {
382 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
383 if (pf->prim_clear)
384 pf->prim_clear(pval, it);
385 else
386 *pval = NULL;
387 return;
388 }
389 if (!it || (it->itype == ASN1_ITYPE_MSTRING))
390 utype = -1;
391 else
392 utype = it->utype;
393 if (utype == V_ASN1_BOOLEAN)
394 *(ASN1_BOOLEAN *)pval = it->size;
395 else *pval = NULL;
396 }