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source: vbox/trunk/src/libs/openssl-3.0.2/crypto/asn1/tasn_new.c@ 94403

Last change on this file since 94403 was 94082, checked in by vboxsync, 3 years ago

libs/openssl-3.0.1: started applying and adjusting our OpenSSL changes to 3.0.1. bugref:10128
File size: 9.2 KB
Line 
1/*
2 * Copyright 2000-2021 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (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, OSSL_LIB_CTX *libctx,
20 const char *propq);
21static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
22 int embed);
23static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
24static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt,
25 OSSL_LIB_CTX *libctx, const char *propq);
26static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
27static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
28
29ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
30{
31 ASN1_VALUE *ret = NULL;
32 if (ASN1_item_ex_new(&ret, it) > 0)
33 return ret;
34 return NULL;
35}
36
37ASN1_VALUE *ASN1_item_new_ex(const ASN1_ITEM *it, OSSL_LIB_CTX *libctx,
38 const char *propq)
39{
40 ASN1_VALUE *ret = NULL;
41 if (asn1_item_embed_new(&ret, it, 0, libctx, propq) > 0)
42 return ret;
43 return NULL;
44}
45
46/* Allocate an ASN1 structure */
47
48
49int ossl_asn1_item_ex_new_intern(ASN1_VALUE **pval, const ASN1_ITEM *it,
50 OSSL_LIB_CTX *libctx, const char *propq)
51{
52 return asn1_item_embed_new(pval, it, 0, libctx, propq);
53}
54
55int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
56{
57 return asn1_item_embed_new(pval, it, 0, NULL, NULL);
58}
59
60int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int embed,
61 OSSL_LIB_CTX *libctx, const char *propq)
62{
63 const ASN1_TEMPLATE *tt = NULL;
64 const ASN1_EXTERN_FUNCS *ef;
65 const ASN1_AUX *aux = it->funcs;
66 ASN1_aux_cb *asn1_cb;
67 ASN1_VALUE **pseqval;
68 int i;
69 if (aux && aux->asn1_cb)
70 asn1_cb = aux->asn1_cb;
71 else
72 asn1_cb = 0;
73
74 switch (it->itype) {
75
76 case ASN1_ITYPE_EXTERN:
77 ef = it->funcs;
78 if (ef != NULL) {
79 if (ef->asn1_ex_new_ex != NULL) {
80 if (!ef->asn1_ex_new_ex(pval, it, libctx, propq))
81 goto memerr;
82 } else if (ef->asn1_ex_new != NULL) {
83 if (!ef->asn1_ex_new(pval, it))
84 goto memerr;
85 }
86 }
87 break;
88
89 case ASN1_ITYPE_PRIMITIVE:
90 if (it->templates) {
91 if (!asn1_template_new(pval, it->templates, libctx, propq))
92 goto memerr;
93 } else if (!asn1_primitive_new(pval, it, embed))
94 goto memerr;
95 break;
96
97 case ASN1_ITYPE_MSTRING:
98 if (!asn1_primitive_new(pval, it, embed))
99 goto memerr;
100 break;
101
102 case ASN1_ITYPE_CHOICE:
103 if (asn1_cb) {
104 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
105 if (!i)
106 goto auxerr;
107 if (i == 2) {
108 return 1;
109 }
110 }
111 if (embed) {
112 memset(*pval, 0, it->size);
113 } else {
114 *pval = OPENSSL_zalloc(it->size);
115 if (*pval == NULL)
116 goto memerr;
117 }
118 ossl_asn1_set_choice_selector(pval, -1, it);
119 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
120 goto auxerr2;
121 break;
122
123 case ASN1_ITYPE_NDEF_SEQUENCE:
124 case ASN1_ITYPE_SEQUENCE:
125 if (asn1_cb) {
126 i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
127 if (!i)
128 goto auxerr;
129 if (i == 2) {
130 return 1;
131 }
132 }
133 if (embed) {
134 memset(*pval, 0, it->size);
135 } else {
136 *pval = OPENSSL_zalloc(it->size);
137 if (*pval == NULL)
138 goto memerr;
139 }
140 /* 0 : init. lock */
141 if (ossl_asn1_do_lock(pval, 0, it) < 0) {
142 if (!embed) {
143 OPENSSL_free(*pval);
144 *pval = NULL;
145 }
146 goto memerr;
147 }
148 ossl_asn1_enc_init(pval, it);
149 for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
150 pseqval = ossl_asn1_get_field_ptr(pval, tt);
151 if (!asn1_template_new(pseqval, tt, libctx, propq))
152 goto memerr2;
153 }
154 if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
155 goto auxerr2;
156 break;
157 }
158 return 1;
159
160 memerr2:
161 ossl_asn1_item_embed_free(pval, it, embed);
162 memerr:
163 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
164 return 0;
165
166 auxerr2:
167 ossl_asn1_item_embed_free(pval, it, embed);
168 auxerr:
169 ERR_raise(ERR_LIB_ASN1, ASN1_R_AUX_ERROR);
170 return 0;
171
172}
173
174static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
175{
176 const ASN1_EXTERN_FUNCS *ef;
177
178 switch (it->itype) {
179
180 case ASN1_ITYPE_EXTERN:
181 ef = it->funcs;
182 if (ef && ef->asn1_ex_clear)
183 ef->asn1_ex_clear(pval, it);
184 else
185 *pval = NULL;
186 break;
187
188 case ASN1_ITYPE_PRIMITIVE:
189 if (it->templates)
190 asn1_template_clear(pval, it->templates);
191 else
192 asn1_primitive_clear(pval, it);
193 break;
194
195 case ASN1_ITYPE_MSTRING:
196 asn1_primitive_clear(pval, it);
197 break;
198
199 case ASN1_ITYPE_CHOICE:
200 case ASN1_ITYPE_SEQUENCE:
201 case ASN1_ITYPE_NDEF_SEQUENCE:
202 *pval = NULL;
203 break;
204 }
205}
206
207static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt,
208 OSSL_LIB_CTX *libctx, const char *propq)
209{
210 const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
211 int embed = tt->flags & ASN1_TFLG_EMBED;
212 ASN1_VALUE *tval;
213 int ret;
214 if (embed) {
215 tval = (ASN1_VALUE *)pval;
216 pval = &tval;
217 }
218 if (tt->flags & ASN1_TFLG_OPTIONAL) {
219 asn1_template_clear(pval, tt);
220 return 1;
221 }
222 /* If ANY DEFINED BY nothing to do */
223
224 if (tt->flags & ASN1_TFLG_ADB_MASK) {
225 *pval = NULL;
226 return 1;
227 }
228 /* If SET OF or SEQUENCE OF, its a STACK */
229 if (tt->flags & ASN1_TFLG_SK_MASK) {
230 STACK_OF(ASN1_VALUE) *skval;
231 skval = sk_ASN1_VALUE_new_null();
232 if (!skval) {
233 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
234 ret = 0;
235 goto done;
236 }
237 *pval = (ASN1_VALUE *)skval;
238 ret = 1;
239 goto done;
240 }
241 /* Otherwise pass it back to the item routine */
242 ret = asn1_item_embed_new(pval, it, embed, libctx, propq);
243 done:
244 return ret;
245}
246
247static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
248{
249 /* If ADB or STACK just NULL the field */
250 if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK))
251 *pval = NULL;
252 else
253 asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
254}
255
256/*
257 * NB: could probably combine most of the real XXX_new() behaviour and junk
258 * all the old functions.
259 */
260
261static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
262 int embed)
263{
264 ASN1_TYPE *typ;
265 ASN1_STRING *str;
266 int utype;
267
268 if (!it)
269 return 0;
270
271 if (it->funcs) {
272 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
273 if (embed) {
274 if (pf->prim_clear) {
275 pf->prim_clear(pval, it);
276 return 1;
277 }
278 } else if (pf->prim_new) {
279 return pf->prim_new(pval, it);
280 }
281 }
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 if ((typ = OPENSSL_malloc(sizeof(*typ))) == NULL) {
302 ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
303 return 0;
304 }
305 typ->value.ptr = NULL;
306 typ->type = -1;
307 *pval = (ASN1_VALUE *)typ;
308 break;
309
310 default:
311 if (embed) {
312 str = *(ASN1_STRING **)pval;
313 memset(str, 0, sizeof(*str));
314 str->type = utype;
315 str->flags = ASN1_STRING_FLAG_EMBED;
316 } else {
317 str = ASN1_STRING_type_new(utype);
318 *pval = (ASN1_VALUE *)str;
319 }
320 if (it->itype == ASN1_ITYPE_MSTRING && str)
321 str->flags |= ASN1_STRING_FLAG_MSTRING;
322 break;
323 }
324 if (*pval)
325 return 1;
326 return 0;
327}
328
329static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
330{
331 int utype;
332 if (it && it->funcs) {
333 const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
334 if (pf->prim_clear)
335 pf->prim_clear(pval, it);
336 else
337 *pval = NULL;
338 return;
339 }
340 if (!it || (it->itype == ASN1_ITYPE_MSTRING))
341 utype = -1;
342 else
343 utype = it->utype;
344 if (utype == V_ASN1_BOOLEAN)
345 *(ASN1_BOOLEAN *)pval = it->size;
346 else
347 *pval = NULL;
348}
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