tasn_new.c revision 325337 
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#include "asn1_int.h"
67
68static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
69                                    int combine);
70static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
71static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
72static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
73
74ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
75{
76    ASN1_VALUE *ret = NULL;
77    if (ASN1_item_ex_new(&ret, it) > 0)
78        return ret;
79    return NULL;
80}
81
82/* Allocate an ASN1 structure */
83
84int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
85{
86    return asn1_item_ex_combine_new(pval, it, 0);
87}
88
89static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
90                                    int combine)
91{
92    const ASN1_TEMPLATE *tt = NULL;
93    const ASN1_COMPAT_FUNCS *cf;
94    const ASN1_EXTERN_FUNCS *ef;
95    const ASN1_AUX *aux = it->funcs;
96    ASN1_aux_cb *asn1_cb;
97    ASN1_VALUE **pseqval;
98    int i;
99    if (aux && aux->asn1_cb)
100        asn1_cb = aux->asn1_cb;
101    else
102        asn1_cb = 0;
103
104#ifdef CRYPTO_MDEBUG
105    if (it->sname)
106        CRYPTO_push_info(it->sname);
107#endif
108
109    switch (it->itype) {
110
111    case ASN1_ITYPE_EXTERN:
112        ef = it->funcs;
113        if (ef && ef->asn1_ex_new) {
114            if (!ef->asn1_ex_new(pval, it))
115                goto memerr;
116        }
117        break;
118
119    case ASN1_ITYPE_COMPAT:
120        cf = it->funcs;
121        if (cf && cf->asn1_new) {
122            *pval = cf->asn1_new();
123            if (!*pval)
124                goto memerr;
125        }
126        break;
127
128    case ASN1_ITYPE_PRIMITIVE:
129        if (it->templates) {
130            if (!ASN1_template_new(pval, it->templates))
131                goto memerr;
132        } else if (!ASN1_primitive_new(pval, it))
133            goto memerr;
134        break;
135
136    case ASN1_ITYPE_MSTRING:
137        if (!ASN1_primitive_new(pval, it))
138            goto memerr;
139        break;
140
141    case ASN1_ITYPE_CHOICE:
142        if (asn1_cb) {
143            i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
144            if (!i)
145                goto auxerr;
146            if (i == 2) {
147#ifdef CRYPTO_MDEBUG
148                if (it->sname)
149                    CRYPTO_pop_info();
150#endif
151                return 1;
152            }
153        }
154        if (!combine) {
155            *pval = OPENSSL_malloc(it->size);
156            if (!*pval)
157                goto memerr;
158            memset(*pval, 0, it->size);
159        }
160        asn1_set_choice_selector(pval, -1, it);
161        if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
162            goto auxerr2;
163        break;
164
165    case ASN1_ITYPE_NDEF_SEQUENCE:
166    case ASN1_ITYPE_SEQUENCE:
167        if (asn1_cb) {
168            i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
169            if (!i)
170                goto auxerr;
171            if (i == 2) {
172#ifdef CRYPTO_MDEBUG
173                if (it->sname)
174                    CRYPTO_pop_info();
175#endif
176                return 1;
177            }
178        }
179        if (!combine) {
180            *pval = OPENSSL_malloc(it->size);
181            if (!*pval)
182                goto memerr;
183            memset(*pval, 0, it->size);
184            asn1_do_lock(pval, 0, it);
185            asn1_enc_init(pval, it);
186        }
187        for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
188            pseqval = asn1_get_field_ptr(pval, tt);
189            if (!ASN1_template_new(pseqval, tt))
190                goto memerr2;
191        }
192        if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
193            goto auxerr2;
194        break;
195    }
196#ifdef CRYPTO_MDEBUG
197    if (it->sname)
198        CRYPTO_pop_info();
199#endif
200    return 1;
201
202 memerr2:
203    asn1_item_combine_free(pval, it, combine);
204 memerr:
205    ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE);
206#ifdef CRYPTO_MDEBUG
207    if (it->sname)
208        CRYPTO_pop_info();
209#endif
210    return 0;
211
212 auxerr2:
213    asn1_item_combine_free(pval, it, combine);
214 auxerr:
215    ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR);
216#ifdef CRYPTO_MDEBUG
217    if (it->sname)
218        CRYPTO_pop_info();
219#endif
220    return 0;
221
222}
223
224static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
225{
226    const ASN1_EXTERN_FUNCS *ef;
227
228    switch (it->itype) {
229
230    case ASN1_ITYPE_EXTERN:
231        ef = it->funcs;
232        if (ef && ef->asn1_ex_clear)
233            ef->asn1_ex_clear(pval, it);
234        else
235            *pval = NULL;
236        break;
237
238    case ASN1_ITYPE_PRIMITIVE:
239        if (it->templates)
240            asn1_template_clear(pval, it->templates);
241        else
242            asn1_primitive_clear(pval, it);
243        break;
244
245    case ASN1_ITYPE_MSTRING:
246        asn1_primitive_clear(pval, it);
247        break;
248
249    case ASN1_ITYPE_COMPAT:
250    case ASN1_ITYPE_CHOICE:
251    case ASN1_ITYPE_SEQUENCE:
252    case ASN1_ITYPE_NDEF_SEQUENCE:
253        *pval = NULL;
254        break;
255    }
256}
257
258int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
259{
260    const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
261    int ret;
262    if (tt->flags & ASN1_TFLG_OPTIONAL) {
263        asn1_template_clear(pval, tt);
264        return 1;
265    }
266    /* If ANY DEFINED BY nothing to do */
267
268    if (tt->flags & ASN1_TFLG_ADB_MASK) {
269        *pval = NULL;
270        return 1;
271    }
272#ifdef CRYPTO_MDEBUG
273    if (tt->field_name)
274        CRYPTO_push_info(tt->field_name);
275#endif
276    /* If SET OF or SEQUENCE OF, its a STACK */
277    if (tt->flags & ASN1_TFLG_SK_MASK) {
278        STACK_OF(ASN1_VALUE) *skval;
279        skval = sk_ASN1_VALUE_new_null();
280        if (!skval) {
281            ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
282            ret = 0;
283            goto done;
284        }
285        *pval = (ASN1_VALUE *)skval;
286        ret = 1;
287        goto done;
288    }
289    /* Otherwise pass it back to the item routine */
290    ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
291 done:
292#ifdef CRYPTO_MDEBUG
293    if (it->sname)
294        CRYPTO_pop_info();
295#endif
296    return ret;
297}
298
299static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
300{
301    /* If ADB or STACK just NULL the field */
302    if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK))
303        *pval = NULL;
304    else
305        asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
306}
307
308/*
309 * NB: could probably combine most of the real XXX_new() behaviour and junk
310 * all the old functions.
311 */
312
313int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
314{
315    ASN1_TYPE *typ;
316    ASN1_STRING *str;
317    int utype;
318
319    if (!it)
320        return 0;
321
322    if (it->funcs) {
323        const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
324        if (pf->prim_new)
325            return pf->prim_new(pval, it);
326    }
327
328    if (it->itype == ASN1_ITYPE_MSTRING)
329        utype = -1;
330    else
331        utype = it->utype;
332    switch (utype) {
333    case V_ASN1_OBJECT:
334        *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
335        return 1;
336
337    case V_ASN1_BOOLEAN:
338        *(ASN1_BOOLEAN *)pval = it->size;
339        return 1;
340
341    case V_ASN1_NULL:
342        *pval = (ASN1_VALUE *)1;
343        return 1;
344
345    case V_ASN1_ANY:
346        typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
347        if (!typ)
348            return 0;
349        typ->value.ptr = NULL;
350        typ->type = -1;
351        *pval = (ASN1_VALUE *)typ;
352        break;
353
354    default:
355        str = ASN1_STRING_type_new(utype);
356        if (it->itype == ASN1_ITYPE_MSTRING && str)
357            str->flags |= ASN1_STRING_FLAG_MSTRING;
358        *pval = (ASN1_VALUE *)str;
359        break;
360    }
361    if (*pval)
362        return 1;
363    return 0;
364}
365
366static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
367{
368    int utype;
369    if (it && it->funcs) {
370        const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
371        if (pf->prim_clear)
372            pf->prim_clear(pval, it);
373        else
374            *pval = NULL;
375        return;
376    }
377    if (!it || (it->itype == ASN1_ITYPE_MSTRING))
378        utype = -1;
379    else
380        utype = it->utype;
381    if (utype == V_ASN1_BOOLEAN)
382        *(ASN1_BOOLEAN *)pval = it->size;
383    else
384        *pval = NULL;
385}
386