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source: vbox/trunk/src/libs/openssl-1.1.1k/crypto/asn1/tasn_new.c@ 90293

Last change on this file since 90293 was 90293, checked in by vboxsync, 4 years ago

openssl-1.1.1k: Applied and adjusted our OpenSSL changes to 1.1.1k. bugref:10072
File size: 9.0 KB
Line 
1/*
2 * Copyright 2000-2018 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <stddef.h>
11#include <openssl/asn1.h>
12#include <openssl/objects.h>
13#include <openssl/err.h>
14#include <openssl/asn1t.h>
15#include <string.h>
16#include "asn1_local.h"
17
18static int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
19 int embed);
20static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
21 int embed);
22static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
23static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
24static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
25static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
26
27ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
28{
29 ASN1_VALUE *ret = NULL;
30 if (ASN1_item_ex_new(&ret, it) > 0)
31 return ret;
32 return NULL;
33}
34
35/* Allocate an ASN1 structure */
36
37int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
38{
39 return asn1_item_embed_new(pval, it, 0);
40}
41
42int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int embed)
43{
44 const ASN1_TEMPLATE *tt = NULL;
45 const ASN1_EXTERN_FUNCS *ef;
46 const ASN1_AUX *aux = it->funcs;
47 ASN1_aux_cb *asn1_cb;
48 ASN1_VALUE **pseqval;
49 int i;
50 if (aux && aux->asn1_cb)
51 asn1_cb = aux->asn1_cb;
52 else
53 asn1_cb = 0;
54
55#ifndef OPENSSL_NO_CRYPTO_MDEBUG
56 OPENSSL_mem_debug_push(it->sname ? it->sname : "asn1_item_embed_new");
57#endif
58
59 switch (it->itype) {
60
61 case ASN1_ITYPE_EXTERN:
62 ef = it->funcs;
63 if (ef && ef->asn1_ex_new) {
64 if (!ef->asn1_ex_new(pval, it))
65 goto memerr;
66 }
67 break;
68
69 case ASN1_ITYPE_PRIMITIVE:
70 if (it->templates) {
71 if (!asn1_template_new(pval, it->templates))
72 goto memerr;
73 } else if (!asn1_primitive_new(pval, it, embed))
74 goto memerr;
75 break;
76
77 case ASN1_ITYPE_MSTRING:
78 if (!asn1_primitive_new(pval, it, embed))
79 goto memerr;
80 break;
81
82 case ASN1_ITYPE_CHOICE:
83 if (asn1_cb) {
84 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
85 if (!i)
86 goto auxerr;
87 if (i == 2) {
88#ifndef OPENSSL_NO_CRYPTO_MDEBUG
89 OPENSSL_mem_debug_pop();
90#endif
91 return 1;
92 }
93 }
94 if (embed) {
95 memset(*pval, 0, it->size);
96 } else {
97 *pval = OPENSSL_zalloc(it->size);
98 if (*pval == NULL)
99 goto memerr;
100 }
101 asn1_set_choice_selector(pval, -1, it);
102 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
103 goto auxerr2;
104 break;
105
106 case ASN1_ITYPE_NDEF_SEQUENCE:
107 case ASN1_ITYPE_SEQUENCE:
108 if (asn1_cb) {
109 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
110 if (!i)
111 goto auxerr;
112 if (i == 2) {
113#ifndef OPENSSL_NO_CRYPTO_MDEBUG
114 OPENSSL_mem_debug_pop();
115#endif
116 return 1;
117 }
118 }
119 if (embed) {
120 memset(*pval, 0, it->size);
121 } else {
122 *pval = OPENSSL_zalloc(it->size);
123 if (*pval == NULL)
124 goto memerr;
125 }
126 /* 0 : init. lock */
127 if (asn1_do_lock(pval, 0, it) < 0) {
128 if (!embed) {
129 OPENSSL_free(*pval);
130 *pval = NULL;
131 }
132 goto memerr;
133 }
134 asn1_enc_init(pval, it);
135 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
136 pseqval = asn1_get_field_ptr(pval, tt);
137 if (!asn1_template_new(pseqval, tt))
138 goto memerr2;
139 }
140 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
141 goto auxerr2;
142 break;
143 }
144#ifndef OPENSSL_NO_CRYPTO_MDEBUG
145 OPENSSL_mem_debug_pop();
146#endif
147 return 1;
148
149 memerr2:
150 asn1_item_embed_free(pval, it, embed);
151 memerr:
152 ASN1err(ASN1_F_ASN1_ITEM_EMBED_NEW, ERR_R_MALLOC_FAILURE);
153#ifndef OPENSSL_NO_CRYPTO_MDEBUG
154 OPENSSL_mem_debug_pop();
155#endif
156 return 0;
157
158 auxerr2:
159 asn1_item_embed_free(pval, it, embed);
160 auxerr:
161 ASN1err(ASN1_F_ASN1_ITEM_EMBED_NEW, ASN1_R_AUX_ERROR);
162#ifndef OPENSSL_NO_CRYPTO_MDEBUG
163 OPENSSL_mem_debug_pop();
164#endif
165 return 0;
166
167}
168
169static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
170{
171 const ASN1_EXTERN_FUNCS *ef;
172
173 switch (it->itype) {
174
175 case ASN1_ITYPE_EXTERN:
176 ef = it->funcs;
177 if (ef && ef->asn1_ex_clear)
178 ef->asn1_ex_clear(pval, it);
179 else
180 *pval = NULL;
181 break;
182
183 case ASN1_ITYPE_PRIMITIVE:
184 if (it->templates)
185 asn1_template_clear(pval, it->templates);
186 else
187 asn1_primitive_clear(pval, it);
188 break;
189
190 case ASN1_ITYPE_MSTRING:
191 asn1_primitive_clear(pval, it);
192 break;
193
194 case ASN1_ITYPE_CHOICE:
195 case ASN1_ITYPE_SEQUENCE:
196 case ASN1_ITYPE_NDEF_SEQUENCE:
197 *pval = NULL;
198 break;
199 }
200}
201
202static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
203{
204 const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
205 int embed = tt->flags & ASN1_TFLG_EMBED;
206 ASN1_VALUE *tval;
207 int ret;
208 if (embed) {
209 tval = (ASN1_VALUE *)pval;
210 pval = &tval;
211 }
212 if (tt->flags & ASN1_TFLG_OPTIONAL) {
213 asn1_template_clear(pval, tt);
214 return 1;
215 }
216 /* If ANY DEFINED BY nothing to do */
217
218 if (tt->flags & ASN1_TFLG_ADB_MASK) {
219 *pval = NULL;
220 return 1;
221 }
222#ifndef OPENSSL_NO_CRYPTO_MDEBUG
223 OPENSSL_mem_debug_push(tt->field_name
224 ? tt->field_name : "asn1_template_new");
225#endif
226 /* If SET OF or SEQUENCE OF, its a STACK */
227 if (tt->flags & ASN1_TFLG_SK_MASK) {
228 STACK_OF(ASN1_VALUE) *skval;
229 skval = sk_ASN1_VALUE_new_null();
230 if (!skval) {
231 ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
232 ret = 0;
233 goto done;
234 }
235 *pval = (ASN1_VALUE *)skval;
236 ret = 1;
237 goto done;
238 }
239 /* Otherwise pass it back to the item routine */
240 ret = asn1_item_embed_new(pval, it, embed);
241 done:
242#ifndef OPENSSL_NO_CRYPTO_MDEBUG
243 OPENSSL_mem_debug_pop();
244#endif
245 return ret;
246}
247
248static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
249{
250 /* If ADB or STACK just NULL the field */
251 if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK))
252 *pval = NULL;
253 else
254 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
255}
256
257/*
258 * NB: could probably combine most of the real XXX_new() behaviour and junk
259 * all the old functions.
260 */
261
262static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
263 int embed)
264{
265 ASN1_TYPE *typ;
266 ASN1_STRING *str;
267 int utype;
268
269 if (!it)
270 return 0;
271
272 if (it->funcs) {
273 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
274 if (embed) {
275 if (pf->prim_clear) {
276 pf->prim_clear(pval, it);
277 return 1;
278 }
279 } else if (pf->prim_new) {
280 return pf->prim_new(pval, it);
281 }
282 }
283
284 if (it->itype == ASN1_ITYPE_MSTRING)
285 utype = -1;
286 else
287 utype = it->utype;
288 switch (utype) {
289 case V_ASN1_OBJECT:
290 *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
291 return 1;
292
293 case V_ASN1_BOOLEAN:
294 *(ASN1_BOOLEAN *)pval = it->size;
295 return 1;
296
297 case V_ASN1_NULL:
298 *pval = (ASN1_VALUE *)1;
299 return 1;
300
301 case V_ASN1_ANY:
302 if ((typ = OPENSSL_malloc(sizeof(*typ))) == NULL) {
303 ASN1err(ASN1_F_ASN1_PRIMITIVE_NEW, ERR_R_MALLOC_FAILURE);
304 return 0;
305 }
306 typ->value.ptr = NULL;
307 typ->type = -1;
308 *pval = (ASN1_VALUE *)typ;
309 break;
310
311 default:
312 if (embed) {
313 str = *(ASN1_STRING **)pval;
314 memset(str, 0, sizeof(*str));
315 str->type = utype;
316 str->flags = ASN1_STRING_FLAG_EMBED;
317 } else {
318 str = ASN1_STRING_type_new(utype);
319 *pval = (ASN1_VALUE *)str;
320 }
321 if (it->itype == ASN1_ITYPE_MSTRING && str)
322 str->flags |= ASN1_STRING_FLAG_MSTRING;
323 break;
324 }
325 if (*pval)
326 return 1;
327 return 0;
328}
329
330static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
331{
332 int utype;
333 if (it && it->funcs) {
334 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
335 if (pf->prim_clear)
336 pf->prim_clear(pval, it);
337 else
338 *pval = NULL;
339 return;
340 }
341 if (!it || (it->itype == ASN1_ITYPE_MSTRING))
342 utype = -1;
343 else
344 utype = it->utype;
345 if (utype == V_ASN1_BOOLEAN)
346 *(ASN1_BOOLEAN *)pval = it->size;
347 else
348 *pval = NULL;
349}
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