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 <openssl/asn1t.h>
60 #include <openssl/err.h>
61 #include <openssl/mem.h>
62 #include <openssl/obj.h>
63
64
65 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
66 int combine);
67 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
68 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
69 static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
70
ASN1_item_new(const ASN1_ITEM * it)71 ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
72 {
73 ASN1_VALUE *ret = NULL;
74 if (ASN1_item_ex_new(&ret, it) > 0)
75 return ret;
76 return NULL;
77 }
78
79 /* Allocate an ASN1 structure */
80
ASN1_item_ex_new(ASN1_VALUE ** pval,const ASN1_ITEM * it)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
asn1_item_ex_combine_new(ASN1_VALUE ** pval,const ASN1_ITEM * it,int combine)86 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
87 int combine)
88 {
89 const ASN1_TEMPLATE *tt = NULL;
90 const ASN1_COMPAT_FUNCS *cf;
91 const ASN1_EXTERN_FUNCS *ef;
92 const ASN1_AUX *aux = it->funcs;
93 ASN1_aux_cb *asn1_cb;
94 ASN1_VALUE **pseqval;
95 int i;
96 if (aux && aux->asn1_cb)
97 asn1_cb = aux->asn1_cb;
98 else
99 asn1_cb = 0;
100
101 if (!combine) *pval = NULL;
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_do_lock(pval, 0, 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 #ifdef CRYPTO_MDEBUG
214 if (it->sname) CRYPTO_pop_info();
215 #endif
216 return 0;
217
218 auxerr:
219 OPENSSL_PUT_ERROR(ASN1, asn1_item_ex_combine_new, ASN1_R_AUX_ERROR);
220 ASN1_item_ex_free(pval, it);
221 #ifdef CRYPTO_MDEBUG
222 if (it->sname) CRYPTO_pop_info();
223 #endif
224 return 0;
225
226 }
227
asn1_item_clear(ASN1_VALUE ** pval,const ASN1_ITEM * it)228 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
229 {
230 const ASN1_EXTERN_FUNCS *ef;
231
232 switch(it->itype)
233 {
234
235 case ASN1_ITYPE_EXTERN:
236 ef = it->funcs;
237 if (ef && ef->asn1_ex_clear)
238 ef->asn1_ex_clear(pval, it);
239 else *pval = NULL;
240 break;
241
242
243 case ASN1_ITYPE_PRIMITIVE:
244 if (it->templates)
245 asn1_template_clear(pval, it->templates);
246 else
247 asn1_primitive_clear(pval, it);
248 break;
249
250 case ASN1_ITYPE_MSTRING:
251 asn1_primitive_clear(pval, it);
252 break;
253
254 case ASN1_ITYPE_COMPAT:
255 case ASN1_ITYPE_CHOICE:
256 case ASN1_ITYPE_SEQUENCE:
257 case ASN1_ITYPE_NDEF_SEQUENCE:
258 *pval = NULL;
259 break;
260 }
261 }
262
263
ASN1_template_new(ASN1_VALUE ** pval,const ASN1_TEMPLATE * tt)264 int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
265 {
266 const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
267 int ret;
268 if (tt->flags & ASN1_TFLG_OPTIONAL)
269 {
270 asn1_template_clear(pval, tt);
271 return 1;
272 }
273 /* If ANY DEFINED BY nothing to do */
274
275 if (tt->flags & ASN1_TFLG_ADB_MASK)
276 {
277 *pval = NULL;
278 return 1;
279 }
280 #ifdef CRYPTO_MDEBUG
281 if (tt->field_name)
282 CRYPTO_push_info(tt->field_name);
283 #endif
284 /* If SET OF or SEQUENCE OF, its a STACK */
285 if (tt->flags & ASN1_TFLG_SK_MASK)
286 {
287 STACK_OF(ASN1_VALUE) *skval;
288 skval = sk_ASN1_VALUE_new_null();
289 if (!skval)
290 {
291 OPENSSL_PUT_ERROR(ASN1, ASN1_template_new, ERR_R_MALLOC_FAILURE);
292 ret = 0;
293 goto done;
294 }
295 *pval = (ASN1_VALUE *)skval;
296 ret = 1;
297 goto done;
298 }
299 /* Otherwise pass it back to the item routine */
300 ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
301 done:
302 #ifdef CRYPTO_MDEBUG
303 if (it->sname)
304 CRYPTO_pop_info();
305 #endif
306 return ret;
307 }
308
asn1_template_clear(ASN1_VALUE ** pval,const ASN1_TEMPLATE * tt)309 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
310 {
311 /* If ADB or STACK just NULL the field */
312 if (tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
313 *pval = NULL;
314 else
315 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
316 }
317
318
319 /* NB: could probably combine most of the real XXX_new() behaviour and junk
320 * all the old functions.
321 */
322
ASN1_primitive_new(ASN1_VALUE ** pval,const ASN1_ITEM * it)323 int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
324 {
325 ASN1_TYPE *typ;
326 ASN1_STRING *str;
327 int utype;
328
329 if (it && it->funcs)
330 {
331 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
332 if (pf->prim_new)
333 return pf->prim_new(pval, it);
334 }
335
336 if (!it || (it->itype == ASN1_ITYPE_MSTRING))
337 utype = -1;
338 else
339 utype = it->utype;
340 switch(utype)
341 {
342 case V_ASN1_OBJECT:
343 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
344 return 1;
345
346 case V_ASN1_BOOLEAN:
347 *(ASN1_BOOLEAN *)pval = it->size;
348 return 1;
349
350 case V_ASN1_NULL:
351 *pval = (ASN1_VALUE *)1;
352 return 1;
353
354 case V_ASN1_ANY:
355 typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
356 if (!typ)
357 return 0;
358 typ->value.ptr = NULL;
359 typ->type = -1;
360 *pval = (ASN1_VALUE *)typ;
361 break;
362
363 default:
364 str = ASN1_STRING_type_new(utype);
365 if (it->itype == ASN1_ITYPE_MSTRING && str)
366 str->flags |= ASN1_STRING_FLAG_MSTRING;
367 *pval = (ASN1_VALUE *)str;
368 break;
369 }
370 if (*pval)
371 return 1;
372 return 0;
373 }
374
asn1_primitive_clear(ASN1_VALUE ** pval,const ASN1_ITEM * it)375 static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
376 {
377 int utype;
378 if (it && it->funcs)
379 {
380 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
381 if (pf->prim_clear)
382 pf->prim_clear(pval, it);
383 else
384 *pval = NULL;
385 return;
386 }
387 if (!it || (it->itype == ASN1_ITYPE_MSTRING))
388 utype = -1;
389 else
390 utype = it->utype;
391 if (utype == V_ASN1_BOOLEAN)
392 *(ASN1_BOOLEAN *)pval = it->size;
393 else *pval = NULL;
394 }
395