1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
2 * All rights reserved.
3 *
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
7 *
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
14 *
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
21 *
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
24 * are met:
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
50 * SUCH DAMAGE.
51 *
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.] */
56
57 #include <openssl/asn1.h>
58
59 #include <string.h>
60
61 #include <openssl/asn1t.h>
62 #include <openssl/err.h>
63 #include <openssl/mem.h>
64 #include <openssl/obj.h>
65
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
ASN1_item_new(const ASN1_ITEM * it)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
ASN1_item_ex_new(ASN1_VALUE ** pval,const ASN1_ITEM * it)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
asn1_item_ex_combine_new(ASN1_VALUE ** pval,const ASN1_ITEM * it,int combine)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 #ifdef CRYPTO_MDEBUG
104 if (it->sname)
105 CRYPTO_push_info(it->sname);
106 #endif
107
108 switch(it->itype)
109 {
110
111 case ASN1_ITYPE_EXTERN:
112 ef = it->funcs;
113 if (ef && ef->asn1_ex_new)
114 {
115 if (!ef->asn1_ex_new(pval, it))
116 goto memerr;
117 }
118 break;
119
120 case ASN1_ITYPE_COMPAT:
121 cf = it->funcs;
122 if (cf && cf->asn1_new) {
123 *pval = cf->asn1_new();
124 if (!*pval)
125 goto memerr;
126 }
127 break;
128
129 case ASN1_ITYPE_PRIMITIVE:
130 if (it->templates)
131 {
132 if (!ASN1_template_new(pval, it->templates))
133 goto memerr;
134 }
135 else if (!ASN1_primitive_new(pval, it))
136 goto memerr;
137 break;
138
139 case ASN1_ITYPE_MSTRING:
140 if (!ASN1_primitive_new(pval, it))
141 goto memerr;
142 break;
143
144 case ASN1_ITYPE_CHOICE:
145 if (asn1_cb)
146 {
147 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
148 if (!i)
149 goto auxerr;
150 if (i==2)
151 {
152 #ifdef CRYPTO_MDEBUG
153 if (it->sname)
154 CRYPTO_pop_info();
155 #endif
156 return 1;
157 }
158 }
159 if (!combine)
160 {
161 *pval = OPENSSL_malloc(it->size);
162 if (!*pval)
163 goto memerr;
164 memset(*pval, 0, it->size);
165 }
166 asn1_set_choice_selector(pval, -1, it);
167 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
168 goto auxerr;
169 break;
170
171 case ASN1_ITYPE_NDEF_SEQUENCE:
172 case ASN1_ITYPE_SEQUENCE:
173 if (asn1_cb)
174 {
175 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
176 if (!i)
177 goto auxerr;
178 if (i==2)
179 {
180 #ifdef CRYPTO_MDEBUG
181 if (it->sname)
182 CRYPTO_pop_info();
183 #endif
184 return 1;
185 }
186 }
187 if (!combine)
188 {
189 *pval = OPENSSL_malloc(it->size);
190 if (!*pval)
191 goto memerr;
192 memset(*pval, 0, it->size);
193 asn1_refcount_set_one(pval, it);
194 asn1_enc_init(pval, it);
195 }
196 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++)
197 {
198 pseqval = asn1_get_field_ptr(pval, tt);
199 if (!ASN1_template_new(pseqval, tt))
200 goto memerr;
201 }
202 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
203 goto auxerr;
204 break;
205 }
206 #ifdef CRYPTO_MDEBUG
207 if (it->sname) CRYPTO_pop_info();
208 #endif
209 return 1;
210
211 memerr:
212 OPENSSL_PUT_ERROR(ASN1, asn1_item_ex_combine_new, ERR_R_MALLOC_FAILURE);
213 ASN1_item_ex_free(pval, it);
214 #ifdef CRYPTO_MDEBUG
215 if (it->sname) CRYPTO_pop_info();
216 #endif
217 return 0;
218
219 auxerr:
220 OPENSSL_PUT_ERROR(ASN1, asn1_item_ex_combine_new, ASN1_R_AUX_ERROR);
221 ASN1_item_ex_free(pval, it);
222 #ifdef CRYPTO_MDEBUG
223 if (it->sname) CRYPTO_pop_info();
224 #endif
225 return 0;
226
227 }
228
asn1_item_clear(ASN1_VALUE ** pval,const ASN1_ITEM * it)229 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
230 {
231 const ASN1_EXTERN_FUNCS *ef;
232
233 switch(it->itype)
234 {
235
236 case ASN1_ITYPE_EXTERN:
237 ef = it->funcs;
238 if (ef && ef->asn1_ex_clear)
239 ef->asn1_ex_clear(pval, it);
240 else *pval = NULL;
241 break;
242
243
244 case ASN1_ITYPE_PRIMITIVE:
245 if (it->templates)
246 asn1_template_clear(pval, it->templates);
247 else
248 asn1_primitive_clear(pval, it);
249 break;
250
251 case ASN1_ITYPE_MSTRING:
252 asn1_primitive_clear(pval, it);
253 break;
254
255 case ASN1_ITYPE_COMPAT:
256 case ASN1_ITYPE_CHOICE:
257 case ASN1_ITYPE_SEQUENCE:
258 case ASN1_ITYPE_NDEF_SEQUENCE:
259 *pval = NULL;
260 break;
261 }
262 }
263
264
ASN1_template_new(ASN1_VALUE ** pval,const ASN1_TEMPLATE * tt)265 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
266 {
267 const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
268 int ret;
269 if (tt->flags & ASN1_TFLG_OPTIONAL)
270 {
271 asn1_template_clear(pval, tt);
272 return 1;
273 }
274 /* If ANY DEFINED BY nothing to do */
275
276 if (tt->flags & ASN1_TFLG_ADB_MASK)
277 {
278 *pval = NULL;
279 return 1;
280 }
281 #ifdef CRYPTO_MDEBUG
282 if (tt->field_name)
283 CRYPTO_push_info(tt->field_name);
284 #endif
285 /* If SET OF or SEQUENCE OF, its a STACK */
286 if (tt->flags & ASN1_TFLG_SK_MASK)
287 {
288 STACK_OF(ASN1_VALUE) *skval;
289 skval = sk_ASN1_VALUE_new_null();
290 if (!skval)
291 {
292 OPENSSL_PUT_ERROR(ASN1, ASN1_template_new, ERR_R_MALLOC_FAILURE);
293 ret = 0;
294 goto done;
295 }
296 *pval = (ASN1_VALUE *)skval;
297 ret = 1;
298 goto done;
299 }
300 /* Otherwise pass it back to the item routine */
301 ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
302 done:
303 #ifdef CRYPTO_MDEBUG
304 if (it->sname)
305 CRYPTO_pop_info();
306 #endif
307 return ret;
308 }
309
asn1_template_clear(ASN1_VALUE ** pval,const ASN1_TEMPLATE * tt)310 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
311 {
312 /* If ADB or STACK just NULL the field */
313 if (tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
314 *pval = NULL;
315 else
316 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
317 }
318
319
320 /* NB: could probably combine most of the real XXX_new() behaviour and junk
321 * all the old functions.
322 */
323
ASN1_primitive_new(ASN1_VALUE ** pval,const ASN1_ITEM * it)324 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
325 {
326 ASN1_TYPE *typ;
327 ASN1_STRING *str;
328 int utype;
329
330 if (!it)
331 return 0;
332
333 if (it->funcs)
334 {
335 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
336 if (pf->prim_new)
337 return pf->prim_new(pval, it);
338 }
339
340 if (it->itype == ASN1_ITYPE_MSTRING)
341 utype = -1;
342 else
343 utype = it->utype;
344 switch(utype)
345 {
346 case V_ASN1_OBJECT:
347 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
348 return 1;
349
350 case V_ASN1_BOOLEAN:
351 *(ASN1_BOOLEAN *)pval = it->size;
352 return 1;
353
354 case V_ASN1_NULL:
355 *pval = (ASN1_VALUE *)1;
356 return 1;
357
358 case V_ASN1_ANY:
359 typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
360 if (!typ)
361 return 0;
362 typ->value.ptr = NULL;
363 typ->type = -1;
364 *pval = (ASN1_VALUE *)typ;
365 break;
366
367 default:
368 str = ASN1_STRING_type_new(utype);
369 if (it->itype == ASN1_ITYPE_MSTRING && str)
370 str->flags |= ASN1_STRING_FLAG_MSTRING;
371 *pval = (ASN1_VALUE *)str;
372 break;
373 }
374 if (*pval)
375 return 1;
376 return 0;
377 }
378
asn1_primitive_clear(ASN1_VALUE ** pval,const ASN1_ITEM * it)379 static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
380 {
381 int utype;
382 if (it && it->funcs)
383 {
384 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
385 if (pf->prim_clear)
386 pf->prim_clear(pval, it);
387 else
388 *pval = NULL;
389 return;
390 }
391 if (!it || (it->itype == ASN1_ITYPE_MSTRING))
392 utype = -1;
393 else
394 utype = it->utype;
395 if (utype == V_ASN1_BOOLEAN)
396 *(ASN1_BOOLEAN *)pval = it->size;
397 else *pval = NULL;
398 }
399