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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 } | |
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