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d3819813 | 1 | /* |
7bf7a6d0 | 2 | * Copyright 2000-2016 The OpenSSL Project Authors. All Rights Reserved. |
3e575651 | 3 | * |
7bf7a6d0 MTL |
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 | |
3e575651 SL |
8 | */ |
9 | ||
3e575651 SL |
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> | |
7bf7a6d0 | 16 | #include "asn1_locl.h" |
3e575651 | 17 | |
7bf7a6d0 MTL |
18 | static int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it, |
19 | int embed); | |
20 | static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it, | |
21 | int embed); | |
3e575651 | 22 | static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); |
7bf7a6d0 | 23 | static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); |
3e575651 | 24 | static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt); |
d3819813 | 25 | static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it); |
3e575651 SL |
26 | |
27 | ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it) | |
d3819813 MTL |
28 | { |
29 | ASN1_VALUE *ret = NULL; | |
30 | if (ASN1_item_ex_new(&ret, it) > 0) | |
31 | return ret; | |
32 | return NULL; | |
33 | } | |
3e575651 SL |
34 | |
35 | /* Allocate an ASN1 structure */ | |
36 | ||
37 | int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
d3819813 | 38 | { |
7bf7a6d0 | 39 | return asn1_item_embed_new(pval, it, 0); |
d3819813 | 40 | } |
3e575651 | 41 | |
7bf7a6d0 | 42 | int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int embed) |
d3819813 MTL |
43 | { |
44 | const ASN1_TEMPLATE *tt = NULL; | |
d3819813 MTL |
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; | |
3e575651 | 54 | |
7bf7a6d0 MTL |
55 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG |
56 | OPENSSL_mem_debug_push(it->sname ? it->sname : "asn1_item_embed_new"); | |
3e575651 SL |
57 | #endif |
58 | ||
d3819813 MTL |
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 | ||
d3819813 MTL |
69 | case ASN1_ITYPE_PRIMITIVE: |
70 | if (it->templates) { | |
7bf7a6d0 | 71 | if (!asn1_template_new(pval, it->templates)) |
d3819813 | 72 | goto memerr; |
7bf7a6d0 | 73 | } else if (!asn1_primitive_new(pval, it, embed)) |
d3819813 MTL |
74 | goto memerr; |
75 | break; | |
76 | ||
77 | case ASN1_ITYPE_MSTRING: | |
7bf7a6d0 | 78 | if (!asn1_primitive_new(pval, it, embed)) |
d3819813 MTL |
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) { | |
7bf7a6d0 MTL |
88 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG |
89 | OPENSSL_mem_debug_pop(); | |
3e575651 | 90 | #endif |
d3819813 MTL |
91 | return 1; |
92 | } | |
93 | } | |
7bf7a6d0 | 94 | if (embed) { |
b6f94dbe | 95 | memset(*pval, 0, it->size); |
7bf7a6d0 MTL |
96 | } else { |
97 | *pval = OPENSSL_zalloc(it->size); | |
98 | if (*pval == NULL) | |
99 | goto memerr; | |
d3819813 MTL |
100 | } |
101 | asn1_set_choice_selector(pval, -1, it); | |
102 | if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) | |
7bf7a6d0 | 103 | goto auxerr2; |
d3819813 MTL |
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) { | |
7bf7a6d0 MTL |
113 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG |
114 | OPENSSL_mem_debug_pop(); | |
3e575651 | 115 | #endif |
d3819813 MTL |
116 | return 1; |
117 | } | |
118 | } | |
7bf7a6d0 | 119 | if (embed) { |
b6f94dbe | 120 | memset(*pval, 0, it->size); |
7bf7a6d0 MTL |
121 | } else { |
122 | *pval = OPENSSL_zalloc(it->size); | |
123 | if (*pval == NULL) | |
124 | goto memerr; | |
d3819813 | 125 | } |
7bf7a6d0 MTL |
126 | /* 0 : init. lock */ |
127 | if (asn1_do_lock(pval, 0, it) < 0) | |
128 | goto memerr2; | |
129 | asn1_enc_init(pval, it); | |
d3819813 MTL |
130 | for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) { |
131 | pseqval = asn1_get_field_ptr(pval, tt); | |
7bf7a6d0 MTL |
132 | if (!asn1_template_new(pseqval, tt)) |
133 | goto memerr2; | |
d3819813 MTL |
134 | } |
135 | if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) | |
7bf7a6d0 | 136 | goto auxerr2; |
d3819813 MTL |
137 | break; |
138 | } | |
7bf7a6d0 MTL |
139 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG |
140 | OPENSSL_mem_debug_pop(); | |
3e575651 | 141 | #endif |
d3819813 | 142 | return 1; |
3e575651 | 143 | |
7bf7a6d0 MTL |
144 | memerr2: |
145 | ASN1_item_ex_free(pval, it); | |
d3819813 | 146 | memerr: |
7bf7a6d0 MTL |
147 | ASN1err(ASN1_F_ASN1_ITEM_EMBED_NEW, ERR_R_MALLOC_FAILURE); |
148 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG | |
149 | OPENSSL_mem_debug_pop(); | |
3e575651 | 150 | #endif |
d3819813 | 151 | return 0; |
3e575651 | 152 | |
7bf7a6d0 | 153 | auxerr2: |
b6f94dbe | 154 | ASN1_item_ex_free(pval, it); |
7bf7a6d0 MTL |
155 | auxerr: |
156 | ASN1err(ASN1_F_ASN1_ITEM_EMBED_NEW, ASN1_R_AUX_ERROR); | |
157 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG | |
158 | OPENSSL_mem_debug_pop(); | |
3e575651 | 159 | #endif |
d3819813 | 160 | return 0; |
3e575651 | 161 | |
d3819813 | 162 | } |
3e575651 SL |
163 | |
164 | static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
d3819813 MTL |
165 | { |
166 | const ASN1_EXTERN_FUNCS *ef; | |
167 | ||
168 | switch (it->itype) { | |
169 | ||
170 | case ASN1_ITYPE_EXTERN: | |
171 | ef = it->funcs; | |
172 | if (ef && ef->asn1_ex_clear) | |
173 | ef->asn1_ex_clear(pval, it); | |
174 | else | |
175 | *pval = NULL; | |
176 | break; | |
177 | ||
178 | case ASN1_ITYPE_PRIMITIVE: | |
179 | if (it->templates) | |
180 | asn1_template_clear(pval, it->templates); | |
181 | else | |
182 | asn1_primitive_clear(pval, it); | |
183 | break; | |
184 | ||
185 | case ASN1_ITYPE_MSTRING: | |
186 | asn1_primitive_clear(pval, it); | |
187 | break; | |
188 | ||
d3819813 MTL |
189 | case ASN1_ITYPE_CHOICE: |
190 | case ASN1_ITYPE_SEQUENCE: | |
191 | case ASN1_ITYPE_NDEF_SEQUENCE: | |
192 | *pval = NULL; | |
193 | break; | |
194 | } | |
195 | } | |
3e575651 | 196 | |
7bf7a6d0 | 197 | static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) |
d3819813 MTL |
198 | { |
199 | const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item); | |
7bf7a6d0 MTL |
200 | int embed = tt->flags & ASN1_TFLG_EMBED; |
201 | ASN1_VALUE *tval; | |
d3819813 | 202 | int ret; |
7bf7a6d0 MTL |
203 | if (embed) { |
204 | tval = (ASN1_VALUE *)pval; | |
205 | pval = &tval; | |
206 | } | |
d3819813 MTL |
207 | if (tt->flags & ASN1_TFLG_OPTIONAL) { |
208 | asn1_template_clear(pval, tt); | |
209 | return 1; | |
210 | } | |
211 | /* If ANY DEFINED BY nothing to do */ | |
212 | ||
213 | if (tt->flags & ASN1_TFLG_ADB_MASK) { | |
214 | *pval = NULL; | |
215 | return 1; | |
216 | } | |
7bf7a6d0 MTL |
217 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG |
218 | OPENSSL_mem_debug_push(tt->field_name | |
219 | ? tt->field_name : "asn1_template_new"); | |
3e575651 | 220 | #endif |
d3819813 MTL |
221 | /* If SET OF or SEQUENCE OF, its a STACK */ |
222 | if (tt->flags & ASN1_TFLG_SK_MASK) { | |
223 | STACK_OF(ASN1_VALUE) *skval; | |
224 | skval = sk_ASN1_VALUE_new_null(); | |
225 | if (!skval) { | |
226 | ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE); | |
227 | ret = 0; | |
228 | goto done; | |
229 | } | |
230 | *pval = (ASN1_VALUE *)skval; | |
231 | ret = 1; | |
232 | goto done; | |
233 | } | |
234 | /* Otherwise pass it back to the item routine */ | |
7bf7a6d0 | 235 | ret = asn1_item_embed_new(pval, it, embed); |
d3819813 | 236 | done: |
7bf7a6d0 MTL |
237 | #ifndef OPENSSL_NO_CRYPTO_MDEBUG |
238 | OPENSSL_mem_debug_pop(); | |
3e575651 | 239 | #endif |
d3819813 MTL |
240 | return ret; |
241 | } | |
3e575651 SL |
242 | |
243 | static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) | |
d3819813 MTL |
244 | { |
245 | /* If ADB or STACK just NULL the field */ | |
246 | if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK)) | |
247 | *pval = NULL; | |
248 | else | |
249 | asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item)); | |
250 | } | |
251 | ||
252 | /* | |
253 | * NB: could probably combine most of the real XXX_new() behaviour and junk | |
3e575651 SL |
254 | * all the old functions. |
255 | */ | |
256 | ||
7bf7a6d0 MTL |
257 | static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it, |
258 | int embed) | |
d3819813 MTL |
259 | { |
260 | ASN1_TYPE *typ; | |
261 | ASN1_STRING *str; | |
262 | int utype; | |
263 | ||
264 | if (!it) | |
265 | return 0; | |
266 | ||
267 | if (it->funcs) { | |
268 | const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; | |
269 | if (pf->prim_new) | |
270 | return pf->prim_new(pval, it); | |
271 | } | |
272 | ||
273 | if (it->itype == ASN1_ITYPE_MSTRING) | |
274 | utype = -1; | |
275 | else | |
276 | utype = it->utype; | |
277 | switch (utype) { | |
278 | case V_ASN1_OBJECT: | |
279 | *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef); | |
280 | return 1; | |
281 | ||
282 | case V_ASN1_BOOLEAN: | |
283 | *(ASN1_BOOLEAN *)pval = it->size; | |
284 | return 1; | |
285 | ||
286 | case V_ASN1_NULL: | |
287 | *pval = (ASN1_VALUE *)1; | |
288 | return 1; | |
289 | ||
290 | case V_ASN1_ANY: | |
7bf7a6d0 MTL |
291 | typ = OPENSSL_malloc(sizeof(*typ)); |
292 | if (typ == NULL) | |
d3819813 MTL |
293 | return 0; |
294 | typ->value.ptr = NULL; | |
295 | typ->type = -1; | |
296 | *pval = (ASN1_VALUE *)typ; | |
297 | break; | |
298 | ||
299 | default: | |
7bf7a6d0 MTL |
300 | if (embed) { |
301 | str = *(ASN1_STRING **)pval; | |
302 | memset(str, 0, sizeof(*str)); | |
303 | str->type = utype; | |
304 | str->flags = ASN1_STRING_FLAG_EMBED; | |
305 | } else { | |
306 | str = ASN1_STRING_type_new(utype); | |
307 | *pval = (ASN1_VALUE *)str; | |
308 | } | |
d3819813 MTL |
309 | if (it->itype == ASN1_ITYPE_MSTRING && str) |
310 | str->flags |= ASN1_STRING_FLAG_MSTRING; | |
d3819813 MTL |
311 | break; |
312 | } | |
313 | if (*pval) | |
314 | return 1; | |
315 | return 0; | |
316 | } | |
317 | ||
318 | static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) | |
319 | { | |
320 | int utype; | |
321 | if (it && it->funcs) { | |
322 | const ASN1_PRIMITIVE_FUNCS *pf = it->funcs; | |
323 | if (pf->prim_clear) | |
324 | pf->prim_clear(pval, it); | |
325 | else | |
326 | *pval = NULL; | |
327 | return; | |
328 | } | |
329 | if (!it || (it->itype == ASN1_ITYPE_MSTRING)) | |
330 | utype = -1; | |
331 | else | |
332 | utype = it->utype; | |
333 | if (utype == V_ASN1_BOOLEAN) | |
334 | *(ASN1_BOOLEAN *)pval = it->size; | |
335 | else | |
336 | *pval = NULL; | |
337 | } |