ref: 009439541d2c6e8af2596f8fb1b4df85861fd212
dir: /third_party/boringssl/src/crypto/asn1/tasn_new.c/
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
* All rights reserved.
*
* This package is an SSL implementation written
* by Eric Young (eay@cryptsoft.com).
* The implementation was written so as to conform with Netscapes SSL.
*
* This library is free for commercial and non-commercial use as long as
* the following conditions are aheared to. The following conditions
* apply to all code found in this distribution, be it the RC4, RSA,
* lhash, DES, etc., code; not just the SSL code. The SSL documentation
* included with this distribution is covered by the same copyright terms
* except that the holder is Tim Hudson (tjh@cryptsoft.com).
*
* Copyright remains Eric Young's, and as such any Copyright notices in
* the code are not to be removed.
* If this package is used in a product, Eric Young should be given attribution
* as the author of the parts of the library used.
* This can be in the form of a textual message at program startup or
* in documentation (online or textual) provided with the package.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* "This product includes cryptographic software written by
* Eric Young (eay@cryptsoft.com)"
* The word 'cryptographic' can be left out if the rouines from the library
* being used are not cryptographic related :-).
* 4. If you include any Windows specific code (or a derivative thereof) from
* the apps directory (application code) you must include an acknowledgement:
* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
*
* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* The licence and distribution terms for any publically available version or
* derivative of this code cannot be changed. i.e. this code cannot simply be
* copied and put under another distribution licence
* [including the GNU Public Licence.] */
#include <openssl/asn1.h>
#include <string.h>
#include <openssl/asn1t.h>
#include <openssl/err.h>
#include <openssl/mem.h>
#include <openssl/obj.h>
#include "../internal.h"
#include "internal.h"
static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
static int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
static int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it);
static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it) {
ASN1_VALUE *ret = NULL;
if (ASN1_item_ex_new(&ret, it) > 0) {
return ret;
}
return NULL;
}
// Allocate an ASN1 structure
int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it) {
const ASN1_TEMPLATE *tt = NULL;
const ASN1_EXTERN_FUNCS *ef;
ASN1_VALUE **pseqval;
int i;
switch (it->itype) {
case ASN1_ITYPE_EXTERN:
ef = it->funcs;
if (ef && ef->asn1_ex_new) {
if (!ef->asn1_ex_new(pval, it)) {
goto memerr;
}
}
break;
case ASN1_ITYPE_PRIMITIVE:
if (it->templates) {
if (!ASN1_template_new(pval, it->templates)) {
goto memerr;
}
} else if (!ASN1_primitive_new(pval, it)) {
goto memerr;
}
break;
case ASN1_ITYPE_MSTRING:
if (!ASN1_primitive_new(pval, it)) {
goto memerr;
}
break;
case ASN1_ITYPE_CHOICE: {
const ASN1_AUX *aux = it->funcs;
ASN1_aux_cb *asn1_cb = aux != NULL ? aux->asn1_cb : NULL;
if (asn1_cb) {
i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
if (!i) {
goto auxerr;
}
if (i == 2) {
return 1;
}
}
*pval = OPENSSL_zalloc(it->size);
if (!*pval) {
goto memerr;
}
asn1_set_choice_selector(pval, -1, it);
if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) {
goto auxerr2;
}
break;
}
case ASN1_ITYPE_SEQUENCE: {
const ASN1_AUX *aux = it->funcs;
ASN1_aux_cb *asn1_cb = aux != NULL ? aux->asn1_cb : NULL;
if (asn1_cb) {
i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
if (!i) {
goto auxerr;
}
if (i == 2) {
return 1;
}
}
*pval = OPENSSL_zalloc(it->size);
if (!*pval) {
goto memerr;
}
asn1_refcount_set_one(pval, it);
asn1_enc_init(pval, it);
for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
pseqval = asn1_get_field_ptr(pval, tt);
if (!ASN1_template_new(pseqval, tt)) {
goto memerr2;
}
}
if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL)) {
goto auxerr2;
}
break;
}
}
return 1;
memerr2:
ASN1_item_ex_free(pval, it);
memerr:
return 0;
auxerr2:
ASN1_item_ex_free(pval, it);
auxerr:
OPENSSL_PUT_ERROR(ASN1, ASN1_R_AUX_ERROR);
return 0;
}
static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) {
switch (it->itype) {
case ASN1_ITYPE_EXTERN:
*pval = NULL;
break;
case ASN1_ITYPE_PRIMITIVE:
if (it->templates) {
asn1_template_clear(pval, it->templates);
} else {
asn1_primitive_clear(pval, it);
}
break;
case ASN1_ITYPE_MSTRING:
asn1_primitive_clear(pval, it);
break;
case ASN1_ITYPE_CHOICE:
case ASN1_ITYPE_SEQUENCE:
*pval = NULL;
break;
}
}
static int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) {
const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
int ret;
if (tt->flags & ASN1_TFLG_OPTIONAL) {
asn1_template_clear(pval, tt);
return 1;
}
// If ANY DEFINED BY nothing to do
if (tt->flags & ASN1_TFLG_ADB_MASK) {
*pval = NULL;
return 1;
}
// If SET OF or SEQUENCE OF, its a STACK
if (tt->flags & ASN1_TFLG_SK_MASK) {
STACK_OF(ASN1_VALUE) *skval;
skval = sk_ASN1_VALUE_new_null();
if (!skval) {
ret = 0;
goto done;
}
*pval = (ASN1_VALUE *)skval;
ret = 1;
goto done;
}
// Otherwise pass it back to the item routine
ret = ASN1_item_ex_new(pval, it);
done:
return ret;
}
static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) {
// If ADB or STACK just NULL the field
if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK)) {
*pval = NULL;
} else {
asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
}
}
// NB: could probably combine most of the real XXX_new() behaviour and junk
// all the old functions.
static int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it) {
if (!it) {
return 0;
}
// Historically, |it->funcs| for primitive types contained an
// |ASN1_PRIMITIVE_FUNCS| table of calbacks.
assert(it->funcs == NULL);
int utype;
if (it->itype == ASN1_ITYPE_MSTRING) {
utype = -1;
} else {
utype = it->utype;
}
switch (utype) {
case V_ASN1_OBJECT:
*pval = (ASN1_VALUE *)OBJ_get_undef();
return 1;
case V_ASN1_BOOLEAN:
*(ASN1_BOOLEAN *)pval = (ASN1_BOOLEAN)it->size;
return 1;
case V_ASN1_NULL:
*pval = (ASN1_VALUE *)1;
return 1;
case V_ASN1_ANY: {
ASN1_TYPE *typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
if (!typ) {
return 0;
}
typ->value.ptr = NULL;
typ->type = -1;
*pval = (ASN1_VALUE *)typ;
break;
}
default:
*pval = (ASN1_VALUE *)ASN1_STRING_type_new(utype);
break;
}
if (*pval) {
return 1;
}
return 0;
}
static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it) {
int utype;
// Historically, |it->funcs| for primitive types contained an
// |ASN1_PRIMITIVE_FUNCS| table of calbacks.
assert(it == NULL || it->funcs == NULL);
if (!it || (it->itype == ASN1_ITYPE_MSTRING)) {
utype = -1;
} else {
utype = it->utype;
}
if (utype == V_ASN1_BOOLEAN) {
*(ASN1_BOOLEAN *)pval = (ASN1_BOOLEAN)it->size;
} else {
*pval = NULL;
}
}