tasn_new.c revision 296465 
1/* tasn_new.c */
2/*
3 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
4 * 2000.
5 */
6/* ====================================================================
7 * Copyright (c) 2000-2004 The OpenSSL Project.  All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 *
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 *
16 * 2. Redistributions in binary form must reproduce the above copyright
17 *    notice, this list of conditions and the following disclaimer in
18 *    the documentation and/or other materials provided with the
19 *    distribution.
20 *
21 * 3. All advertising materials mentioning features or use of this
22 *    software must display the following acknowledgment:
23 *    "This product includes software developed by the OpenSSL Project
24 *    for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
25 *
26 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
27 *    endorse or promote products derived from this software without
28 *    prior written permission. For written permission, please contact
29 *    licensing@OpenSSL.org.
30 *
31 * 5. Products derived from this software may not be called "OpenSSL"
32 *    nor may "OpenSSL" appear in their names without prior written
33 *    permission of the OpenSSL Project.
34 *
35 * 6. Redistributions of any form whatsoever must retain the following
36 *    acknowledgment:
37 *    "This product includes software developed by the OpenSSL Project
38 *    for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
39 *
40 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
41 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
43 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE OpenSSL PROJECT OR
44 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
45 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
46 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
47 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
49 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
50 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
51 * OF THE POSSIBILITY OF SUCH DAMAGE.
52 * ====================================================================
53 *
54 * This product includes cryptographic software written by Eric Young
55 * (eay@cryptsoft.com).  This product includes software written by Tim
56 * Hudson (tjh@cryptsoft.com).
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#ifdef CRYPTO_MDEBUG
104    if (it->sname)
105        CRYPTO_push_info(it->sname);
106#endif
107
108    switch (it->itype) {
109
110    case ASN1_ITYPE_EXTERN:
111        ef = it->funcs;
112        if (ef && ef->asn1_ex_new) {
113            if (!ef->asn1_ex_new(pval, it))
114                goto memerr;
115        }
116        break;
117
118    case ASN1_ITYPE_COMPAT:
119        cf = it->funcs;
120        if (cf && cf->asn1_new) {
121            *pval = cf->asn1_new();
122            if (!*pval)
123                goto memerr;
124        }
125        break;
126
127    case ASN1_ITYPE_PRIMITIVE:
128        if (it->templates) {
129            if (!ASN1_template_new(pval, it->templates))
130                goto memerr;
131        } else if (!ASN1_primitive_new(pval, it))
132            goto memerr;
133        break;
134
135    case ASN1_ITYPE_MSTRING:
136        if (!ASN1_primitive_new(pval, it))
137            goto memerr;
138        break;
139
140    case ASN1_ITYPE_CHOICE:
141        if (asn1_cb) {
142            i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
143            if (!i)
144                goto auxerr;
145            if (i == 2) {
146#ifdef CRYPTO_MDEBUG
147                if (it->sname)
148                    CRYPTO_pop_info();
149#endif
150                return 1;
151            }
152        }
153        if (!combine) {
154            *pval = OPENSSL_malloc(it->size);
155            if (!*pval)
156                goto memerr;
157            memset(*pval, 0, it->size);
158        }
159        asn1_set_choice_selector(pval, -1, it);
160        if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
161            goto auxerr;
162        break;
163
164    case ASN1_ITYPE_NDEF_SEQUENCE:
165    case ASN1_ITYPE_SEQUENCE:
166        if (asn1_cb) {
167            i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
168            if (!i)
169                goto auxerr;
170            if (i == 2) {
171#ifdef CRYPTO_MDEBUG
172                if (it->sname)
173                    CRYPTO_pop_info();
174#endif
175                return 1;
176            }
177        }
178        if (!combine) {
179            *pval = OPENSSL_malloc(it->size);
180            if (!*pval)
181                goto memerr;
182            memset(*pval, 0, it->size);
183            asn1_do_lock(pval, 0, it);
184            asn1_enc_init(pval, it);
185        }
186        for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
187            pseqval = asn1_get_field_ptr(pval, tt);
188            if (!ASN1_template_new(pseqval, tt))
189                goto memerr;
190        }
191        if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
192            goto auxerr;
193        break;
194    }
195#ifdef CRYPTO_MDEBUG
196    if (it->sname)
197        CRYPTO_pop_info();
198#endif
199    return 1;
200
201 memerr:
202    ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE);
203#ifdef CRYPTO_MDEBUG
204    if (it->sname)
205        CRYPTO_pop_info();
206#endif
207    return 0;
208
209 auxerr:
210    ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR);
211    ASN1_item_ex_free(pval, it);
212#ifdef CRYPTO_MDEBUG
213    if (it->sname)
214        CRYPTO_pop_info();
215#endif
216    return 0;
217
218}
219
220static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
221{
222    const ASN1_EXTERN_FUNCS *ef;
223
224    switch (it->itype) {
225
226    case ASN1_ITYPE_EXTERN:
227        ef = it->funcs;
228        if (ef && ef->asn1_ex_clear)
229            ef->asn1_ex_clear(pval, it);
230        else
231            *pval = NULL;
232        break;
233
234    case ASN1_ITYPE_PRIMITIVE:
235        if (it->templates)
236            asn1_template_clear(pval, it->templates);
237        else
238            asn1_primitive_clear(pval, it);
239        break;
240
241    case ASN1_ITYPE_MSTRING:
242        asn1_primitive_clear(pval, it);
243        break;
244
245    case ASN1_ITYPE_COMPAT:
246    case ASN1_ITYPE_CHOICE:
247    case ASN1_ITYPE_SEQUENCE:
248    case ASN1_ITYPE_NDEF_SEQUENCE:
249        *pval = NULL;
250        break;
251    }
252}
253
254int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
255{
256    const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
257    int ret;
258    if (tt->flags & ASN1_TFLG_OPTIONAL) {
259        asn1_template_clear(pval, tt);
260        return 1;
261    }
262    /* If ANY DEFINED BY nothing to do */
263
264    if (tt->flags & ASN1_TFLG_ADB_MASK) {
265        *pval = NULL;
266        return 1;
267    }
268#ifdef CRYPTO_MDEBUG
269    if (tt->field_name)
270        CRYPTO_push_info(tt->field_name);
271#endif
272    /* If SET OF or SEQUENCE OF, its a STACK */
273    if (tt->flags & ASN1_TFLG_SK_MASK) {
274        STACK_OF(ASN1_VALUE) *skval;
275        skval = sk_ASN1_VALUE_new_null();
276        if (!skval) {
277            ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
278            ret = 0;
279            goto done;
280        }
281        *pval = (ASN1_VALUE *)skval;
282        ret = 1;
283        goto done;
284    }
285    /* Otherwise pass it back to the item routine */
286    ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
287 done:
288#ifdef CRYPTO_MDEBUG
289    if (it->sname)
290        CRYPTO_pop_info();
291#endif
292    return ret;
293}
294
295static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
296{
297    /* If ADB or STACK just NULL the field */
298    if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK))
299        *pval = NULL;
300    else
301        asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
302}
303
304/*
305 * NB: could probably combine most of the real XXX_new() behaviour and junk
306 * all the old functions.
307 */
308
309int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
310{
311    ASN1_TYPE *typ;
312    int utype;
313
314    if (it && it->funcs) {
315        const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
316        if (pf->prim_new)
317            return pf->prim_new(pval, it);
318    }
319
320    if (!it || (it->itype == ASN1_ITYPE_MSTRING))
321        utype = -1;
322    else
323        utype = it->utype;
324    switch (utype) {
325    case V_ASN1_OBJECT:
326        *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
327        return 1;
328
329    case V_ASN1_BOOLEAN:
330        if (it)
331            *(ASN1_BOOLEAN *)pval = it->size;
332        else
333            *(ASN1_BOOLEAN *)pval = -1;
334        return 1;
335
336    case V_ASN1_NULL:
337        *pval = (ASN1_VALUE *)1;
338        return 1;
339
340    case V_ASN1_ANY:
341        typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
342        if (!typ)
343            return 0;
344        typ->value.ptr = NULL;
345        typ->type = -1;
346        *pval = (ASN1_VALUE *)typ;
347        break;
348
349    default:
350        *pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
351        break;
352    }
353    if (*pval)
354        return 1;
355    return 0;
356}
357
358void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
359{
360    int utype;
361    if (it && it->funcs) {
362        const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
363        if (pf->prim_clear)
364            pf->prim_clear(pval, it);
365        else
366            *pval = NULL;
367        return;
368    }
369    if (!it || (it->itype == ASN1_ITYPE_MSTRING))
370        utype = -1;
371    else
372        utype = it->utype;
373    if (utype == V_ASN1_BOOLEAN)
374        *(ASN1_BOOLEAN *)pval = it->size;
375    else
376        *pval = NULL;
377}
378