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 #include "internal.h"
67 #include "../internal.h"
68
69
70 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
71 int combine);
72 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
73 static int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
74 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
75 static int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
76 static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
77
ASN1_item_new(const ASN1_ITEM * it)78 ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
79 {
80 ASN1_VALUE *ret = NULL;
81 if (ASN1_item_ex_new(&ret, it) > 0)
82 return ret;
83 return NULL;
84 }
85
86 /* Allocate an ASN1 structure */
87
ASN1_item_ex_new(ASN1_VALUE ** pval,const ASN1_ITEM * it)88 int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
89 {
90 return asn1_item_ex_combine_new(pval, it, 0);
91 }
92
asn1_item_ex_combine_new(ASN1_VALUE ** pval,const ASN1_ITEM * it,int combine)93 static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
94 int combine)
95 {
96 const ASN1_TEMPLATE *tt = NULL;
97 const ASN1_EXTERN_FUNCS *ef;
98 ASN1_VALUE **pseqval;
99 int i;
100
101 switch (it->itype) {
102
103 case ASN1_ITYPE_EXTERN:
104 ef = it->funcs;
105 if (ef && ef->asn1_ex_new) {
106 if (!ef->asn1_ex_new(pval, it))
107 goto memerr;
108 }
109 break;
110
111 case ASN1_ITYPE_PRIMITIVE:
112 if (it->templates) {
113 if (!ASN1_template_new(pval, it->templates))
114 goto memerr;
115 } else if (!ASN1_primitive_new(pval, it))
116 goto memerr;
117 break;
118
119 case ASN1_ITYPE_MSTRING:
120 if (!ASN1_primitive_new(pval, it))
121 goto memerr;
122 break;
123
124 case ASN1_ITYPE_CHOICE: {
125 const ASN1_AUX *aux = it->funcs;
126 ASN1_aux_cb *asn1_cb = aux != NULL ? aux->asn1_cb : NULL;
127 if (asn1_cb) {
128 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
129 if (!i)
130 goto auxerr;
131 if (i == 2) {
132 return 1;
133 }
134 }
135 if (!combine) {
136 *pval = OPENSSL_malloc(it->size);
137 if (!*pval)
138 goto memerr;
139 OPENSSL_memset(*pval, 0, it->size);
140 }
141 asn1_set_choice_selector(pval, -1, it);
142 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
143 goto auxerr2;
144 break;
145 }
146
147 case ASN1_ITYPE_SEQUENCE: {
148 const ASN1_AUX *aux = it->funcs;
149 ASN1_aux_cb *asn1_cb = aux != NULL ? aux->asn1_cb : NULL;
150 if (asn1_cb) {
151 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
152 if (!i)
153 goto auxerr;
154 if (i == 2) {
155 return 1;
156 }
157 }
158 if (!combine) {
159 *pval = OPENSSL_malloc(it->size);
160 if (!*pval)
161 goto memerr;
162 OPENSSL_memset(*pval, 0, it->size);
163 asn1_refcount_set_one(pval, it);
164 asn1_enc_init(pval, it);
165 }
166 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
167 pseqval = asn1_get_field_ptr(pval, tt);
168 if (!ASN1_template_new(pseqval, tt))
169 goto memerr2;
170 }
171 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
172 goto auxerr2;
173 break;
174 }
175 }
176 return 1;
177
178 memerr2:
179 asn1_item_combine_free(pval, it, combine);
180 memerr:
181 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
182 return 0;
183
184 auxerr2:
185 asn1_item_combine_free(pval, it, combine);
186 auxerr:
187 OPENSSL_PUT_ERROR(ASN1, ASN1_R_AUX_ERROR);
188 return 0;
189
190 }
191
asn1_item_clear(ASN1_VALUE ** pval,const ASN1_ITEM * it)192 static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
193 {
194 const ASN1_EXTERN_FUNCS *ef;
195
196 switch (it->itype) {
197
198 case ASN1_ITYPE_EXTERN:
199 ef = it->funcs;
200 if (ef && ef->asn1_ex_clear)
201 ef->asn1_ex_clear(pval, it);
202 else
203 *pval = NULL;
204 break;
205
206 case ASN1_ITYPE_PRIMITIVE:
207 if (it->templates)
208 asn1_template_clear(pval, it->templates);
209 else
210 asn1_primitive_clear(pval, it);
211 break;
212
213 case ASN1_ITYPE_MSTRING:
214 asn1_primitive_clear(pval, it);
215 break;
216
217 case ASN1_ITYPE_CHOICE:
218 case ASN1_ITYPE_SEQUENCE:
219 *pval = NULL;
220 break;
221 }
222 }
223
ASN1_template_new(ASN1_VALUE ** pval,const ASN1_TEMPLATE * tt)224 static int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
225 {
226 const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
227 int ret;
228 if (tt->flags & ASN1_TFLG_OPTIONAL) {
229 asn1_template_clear(pval, tt);
230 return 1;
231 }
232 /* If ANY DEFINED BY nothing to do */
233
234 if (tt->flags & ASN1_TFLG_ADB_MASK) {
235 *pval = NULL;
236 return 1;
237 }
238 /* If SET OF or SEQUENCE OF, its a STACK */
239 if (tt->flags & ASN1_TFLG_SK_MASK) {
240 STACK_OF(ASN1_VALUE) *skval;
241 skval = sk_ASN1_VALUE_new_null();
242 if (!skval) {
243 OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
244 ret = 0;
245 goto done;
246 }
247 *pval = (ASN1_VALUE *)skval;
248 ret = 1;
249 goto done;
250 }
251 /* Otherwise pass it back to the item routine */
252 ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
253 done:
254 return ret;
255 }
256
asn1_template_clear(ASN1_VALUE ** pval,const ASN1_TEMPLATE * tt)257 static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
258 {
259 /* If ADB or STACK just NULL the field */
260 if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK))
261 *pval = NULL;
262 else
263 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
264 }
265
266 /*
267 * NB: could probably combine most of the real XXX_new() behaviour and junk
268 * all the old functions.
269 */
270
ASN1_primitive_new(ASN1_VALUE ** pval,const ASN1_ITEM * it)271 static int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
272 {
273 ASN1_TYPE *typ;
274 int utype;
275
276 if (!it)
277 return 0;
278
279 /* Historically, |it->funcs| for primitive types contained an
280 * |ASN1_PRIMITIVE_FUNCS| table of calbacks. */
281 assert(it->funcs == NULL);
282
283 if (it->itype == ASN1_ITYPE_MSTRING)
284 utype = -1;
285 else
286 utype = it->utype;
287 switch (utype) {
288 case V_ASN1_OBJECT:
289 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
290 return 1;
291
292 case V_ASN1_BOOLEAN:
293 *(ASN1_BOOLEAN *)pval = it->size;
294 return 1;
295
296 case V_ASN1_NULL:
297 *pval = (ASN1_VALUE *)1;
298 return 1;
299
300 case V_ASN1_ANY:
301 typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
302 if (!typ)
303 return 0;
304 typ->value.ptr = NULL;
305 typ->type = -1;
306 *pval = (ASN1_VALUE *)typ;
307 break;
308
309 default:
310 *pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
311 break;
312 }
313 if (*pval)
314 return 1;
315 return 0;
316 }
317
asn1_primitive_clear(ASN1_VALUE ** pval,const ASN1_ITEM * it)318 static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
319 {
320 int utype;
321 /* Historically, |it->funcs| for primitive types contained an
322 * |ASN1_PRIMITIVE_FUNCS| table of calbacks. */
323 assert(it == NULL || it->funcs == NULL);
324 if (!it || (it->itype == ASN1_ITYPE_MSTRING))
325 utype = -1;
326 else
327 utype = it->utype;
328 if (utype == V_ASN1_BOOLEAN)
329 *(ASN1_BOOLEAN *)pval = it->size;
330 else
331 *pval = NULL;
332 }
333