1/* tasn_new.c */
2/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
3 * project 2000.
4 */
5/* ====================================================================
6 * Copyright (c) 2000-2004 The OpenSSL Project.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 *
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in
17 *    the documentation and/or other materials provided with the
18 *    distribution.
19 *
20 * 3. All advertising materials mentioning features or use of this
21 *    software must display the following acknowledgment:
22 *    "This product includes software developed by the OpenSSL Project
23 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
24 *
25 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
26 *    endorse or promote products derived from this software without
27 *    prior written permission. For written permission, please contact
28 *    licensing@OpenSSL.org.
29 *
30 * 5. Products derived from this software may not be called "OpenSSL"
31 *    nor may "OpenSSL" appear in their names without prior written
32 *    permission of the OpenSSL Project.
33 *
34 * 6. Redistributions of any form whatsoever must retain the following
35 *    acknowledgment:
36 *    "This product includes software developed by the OpenSSL Project
37 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
38 *
39 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
40 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
41 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
42 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
43 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
44 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
45 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
46 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
48 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
49 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
50 * OF THE POSSIBILITY OF SUCH DAMAGE.
51 * ====================================================================
52 *
53 * This product includes cryptographic software written by Eric Young
54 * (eay@cryptsoft.com).  This product includes software written by Tim
55 * Hudson (tjh@cryptsoft.com).
56 *
57 */
58
59
60#include <stddef.h>
61#include <openssl/asn1.h>
62#include <openssl/objects.h>
63#include <openssl/err.h>
64#include <openssl/asn1t.h>
65#include <string.h>
66
67static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
68								int combine);
69static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
70static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
71void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
72
73ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
74	{
75	ASN1_VALUE *ret = NULL;
76	if (ASN1_item_ex_new(&ret, it) > 0)
77		return ret;
78	return NULL;
79	}
80
81/* Allocate an ASN1 structure */
82
83int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
84	{
85	return asn1_item_ex_combine_new(pval, it, 0);
86	}
87
88static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
89								int combine)
90	{
91	const ASN1_TEMPLATE *tt = NULL;
92	const ASN1_COMPAT_FUNCS *cf;
93	const ASN1_EXTERN_FUNCS *ef;
94	const ASN1_AUX *aux = it->funcs;
95	ASN1_aux_cb *asn1_cb;
96	ASN1_VALUE **pseqval;
97	int i;
98	if (aux && aux->asn1_cb)
99		asn1_cb = aux->asn1_cb;
100	else
101		asn1_cb = 0;
102
103	if (!combine) *pval = NULL;
104
105#ifdef CRYPTO_MDEBUG
106	if (it->sname)
107		CRYPTO_push_info(it->sname);
108#endif
109
110	switch(it->itype)
111		{
112
113		case ASN1_ITYPE_EXTERN:
114		ef = it->funcs;
115		if (ef && ef->asn1_ex_new)
116			{
117			if (!ef->asn1_ex_new(pval, it))
118				goto memerr;
119			}
120		break;
121
122		case ASN1_ITYPE_COMPAT:
123		cf = it->funcs;
124		if (cf && cf->asn1_new) {
125			*pval = cf->asn1_new();
126			if (!*pval)
127				goto memerr;
128		}
129		break;
130
131		case ASN1_ITYPE_PRIMITIVE:
132		if (it->templates)
133			{
134			if (!ASN1_template_new(pval, it->templates))
135				goto memerr;
136			}
137		else if (!ASN1_primitive_new(pval, it))
138				goto memerr;
139		break;
140
141		case ASN1_ITYPE_MSTRING:
142		if (!ASN1_primitive_new(pval, it))
143				goto memerr;
144		break;
145
146		case ASN1_ITYPE_CHOICE:
147		if (asn1_cb)
148			{
149			i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
150			if (!i)
151				goto auxerr;
152			if (i==2)
153				{
154#ifdef CRYPTO_MDEBUG
155				if (it->sname)
156					CRYPTO_pop_info();
157#endif
158				return 1;
159				}
160			}
161		if (!combine)
162			{
163			*pval = OPENSSL_malloc(it->size);
164			if (!*pval)
165				goto memerr;
166			memset(*pval, 0, it->size);
167			}
168		asn1_set_choice_selector(pval, -1, it);
169		if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
170				goto auxerr;
171		break;
172
173		case ASN1_ITYPE_NDEF_SEQUENCE:
174		case ASN1_ITYPE_SEQUENCE:
175		if (asn1_cb)
176			{
177			i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
178			if (!i)
179				goto auxerr;
180			if (i==2)
181				{
182#ifdef CRYPTO_MDEBUG
183				if (it->sname)
184					CRYPTO_pop_info();
185#endif
186				return 1;
187				}
188			}
189		if (!combine)
190			{
191			*pval = OPENSSL_malloc(it->size);
192			if (!*pval)
193				goto memerr;
194			memset(*pval, 0, it->size);
195			asn1_do_lock(pval, 0, it);
196			asn1_enc_init(pval, it);
197			}
198		for (i = 0, tt = it->templates; i < it->tcount; tt++, i++)
199			{
200			pseqval = asn1_get_field_ptr(pval, tt);
201			if (!ASN1_template_new(pseqval, tt))
202				goto memerr;
203			}
204		if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
205				goto auxerr;
206		break;
207	}
208#ifdef CRYPTO_MDEBUG
209	if (it->sname) CRYPTO_pop_info();
210#endif
211	return 1;
212
213	memerr:
214	ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE);
215#ifdef CRYPTO_MDEBUG
216	if (it->sname) CRYPTO_pop_info();
217#endif
218	return 0;
219
220	auxerr:
221	ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR);
222	ASN1_item_ex_free(pval, it);
223#ifdef CRYPTO_MDEBUG
224	if (it->sname) CRYPTO_pop_info();
225#endif
226	return 0;
227
228	}
229
230static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
231	{
232	const ASN1_EXTERN_FUNCS *ef;
233
234	switch(it->itype)
235		{
236
237		case ASN1_ITYPE_EXTERN:
238		ef = it->funcs;
239		if (ef && ef->asn1_ex_clear)
240			ef->asn1_ex_clear(pval, it);
241		else *pval = NULL;
242		break;
243
244
245		case ASN1_ITYPE_PRIMITIVE:
246		if (it->templates)
247			asn1_template_clear(pval, it->templates);
248		else
249			asn1_primitive_clear(pval, it);
250		break;
251
252		case ASN1_ITYPE_MSTRING:
253		asn1_primitive_clear(pval, it);
254		break;
255
256		case ASN1_ITYPE_COMPAT:
257		case ASN1_ITYPE_CHOICE:
258		case ASN1_ITYPE_SEQUENCE:
259		case ASN1_ITYPE_NDEF_SEQUENCE:
260		*pval = NULL;
261		break;
262		}
263	}
264
265
266int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
267	{
268	const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
269	int ret;
270	if (tt->flags & ASN1_TFLG_OPTIONAL)
271		{
272		asn1_template_clear(pval, tt);
273		return 1;
274		}
275	/* If ANY DEFINED BY nothing to do */
276
277	if (tt->flags & ASN1_TFLG_ADB_MASK)
278		{
279		*pval = NULL;
280		return 1;
281		}
282#ifdef CRYPTO_MDEBUG
283	if (tt->field_name)
284		CRYPTO_push_info(tt->field_name);
285#endif
286	/* If SET OF or SEQUENCE OF, its a STACK */
287	if (tt->flags & ASN1_TFLG_SK_MASK)
288		{
289		STACK_OF(ASN1_VALUE) *skval;
290		skval = sk_ASN1_VALUE_new_null();
291		if (!skval)
292			{
293			ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
294			ret = 0;
295			goto done;
296			}
297		*pval = (ASN1_VALUE *)skval;
298		ret = 1;
299		goto done;
300		}
301	/* Otherwise pass it back to the item routine */
302	ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
303	done:
304#ifdef CRYPTO_MDEBUG
305	if (it->sname)
306		CRYPTO_pop_info();
307#endif
308	return ret;
309	}
310
311static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
312	{
313	/* If ADB or STACK just NULL the field */
314	if (tt->flags & (ASN1_TFLG_ADB_MASK|ASN1_TFLG_SK_MASK))
315		*pval = NULL;
316	else
317		asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
318	}
319
320
321/* NB: could probably combine most of the real XXX_new() behaviour and junk
322 * all the old functions.
323 */
324
325int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
326	{
327	ASN1_TYPE *typ;
328	int utype;
329
330	if (it && it->funcs)
331		{
332		const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
333		if (pf->prim_new)
334			return pf->prim_new(pval, it);
335		}
336
337	if (!it || (it->itype == ASN1_ITYPE_MSTRING))
338		utype = -1;
339	else
340		utype = it->utype;
341	switch(utype)
342		{
343		case V_ASN1_OBJECT:
344		*pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
345		return 1;
346
347		case V_ASN1_BOOLEAN:
348		if (it)
349			*(ASN1_BOOLEAN *)pval = it->size;
350		else
351			*(ASN1_BOOLEAN *)pval = -1;
352		return 1;
353
354		case V_ASN1_NULL:
355		*pval = (ASN1_VALUE *)1;
356		return 1;
357
358		case V_ASN1_ANY:
359		typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
360		if (!typ)
361			return 0;
362		typ->value.ptr = NULL;
363		typ->type = -1;
364		*pval = (ASN1_VALUE *)typ;
365		break;
366
367		default:
368		*pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
369		break;
370		}
371	if (*pval)
372		return 1;
373	return 0;
374	}
375
376void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
377	{
378	int utype;
379	if (it && it->funcs)
380		{
381		const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
382		if (pf->prim_clear)
383			pf->prim_clear(pval, it);
384		else
385			*pval = NULL;
386		return;
387		}
388	if (!it || (it->itype == ASN1_ITYPE_MSTRING))
389		utype = -1;
390	else
391		utype = it->utype;
392	if (utype == V_ASN1_BOOLEAN)
393		*(ASN1_BOOLEAN *)pval = it->size;
394	else *pval = NULL;
395	}
396