388 lines
11 KiB
C
388 lines
11 KiB
C
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.] */
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#include <openssl/asn1.h>
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#include <string.h>
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#include <openssl/asn1t.h>
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#include <openssl/err.h>
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#include <openssl/mem.h>
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#include <openssl/obj.h>
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#include "asn1_locl.h"
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#include "../internal.h"
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static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
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int combine);
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static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
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static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
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static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
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ASN1_VALUE *ASN1_item_new(const ASN1_ITEM *it)
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{
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ASN1_VALUE *ret = NULL;
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if (ASN1_item_ex_new(&ret, it) > 0)
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return ret;
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return NULL;
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}
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/* Allocate an ASN1 structure */
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int ASN1_item_ex_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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return asn1_item_ex_combine_new(pval, it, 0);
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}
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static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
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int combine)
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{
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const ASN1_TEMPLATE *tt = NULL;
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const ASN1_COMPAT_FUNCS *cf;
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const ASN1_EXTERN_FUNCS *ef;
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const ASN1_AUX *aux = it->funcs;
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ASN1_aux_cb *asn1_cb;
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ASN1_VALUE **pseqval;
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int i;
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if (aux && aux->asn1_cb)
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asn1_cb = aux->asn1_cb;
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else
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asn1_cb = 0;
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#ifdef CRYPTO_MDEBUG
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if (it->sname)
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CRYPTO_push_info(it->sname);
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#endif
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switch (it->itype) {
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case ASN1_ITYPE_EXTERN:
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ef = it->funcs;
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if (ef && ef->asn1_ex_new) {
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if (!ef->asn1_ex_new(pval, it))
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goto memerr;
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}
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break;
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case ASN1_ITYPE_COMPAT:
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cf = it->funcs;
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if (cf && cf->asn1_new) {
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*pval = cf->asn1_new();
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if (!*pval)
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goto memerr;
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}
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break;
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case ASN1_ITYPE_PRIMITIVE:
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if (it->templates) {
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if (!ASN1_template_new(pval, it->templates))
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goto memerr;
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} else if (!ASN1_primitive_new(pval, it))
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goto memerr;
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break;
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case ASN1_ITYPE_MSTRING:
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if (!ASN1_primitive_new(pval, it))
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goto memerr;
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break;
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case ASN1_ITYPE_CHOICE:
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if (asn1_cb) {
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i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
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if (!i)
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goto auxerr;
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if (i == 2) {
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#ifdef CRYPTO_MDEBUG
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if (it->sname)
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CRYPTO_pop_info();
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#endif
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return 1;
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}
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}
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if (!combine) {
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*pval = OPENSSL_malloc(it->size);
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if (!*pval)
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goto memerr;
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OPENSSL_memset(*pval, 0, it->size);
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}
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asn1_set_choice_selector(pval, -1, it);
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if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
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goto auxerr2;
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break;
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case ASN1_ITYPE_NDEF_SEQUENCE:
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case ASN1_ITYPE_SEQUENCE:
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if (asn1_cb) {
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i = asn1_cb(ASN1_OP_NEW_PRE, pval, it, NULL);
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if (!i)
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goto auxerr;
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if (i == 2) {
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#ifdef CRYPTO_MDEBUG
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if (it->sname)
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CRYPTO_pop_info();
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#endif
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return 1;
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}
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}
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if (!combine) {
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*pval = OPENSSL_malloc(it->size);
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if (!*pval)
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goto memerr;
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OPENSSL_memset(*pval, 0, it->size);
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asn1_refcount_set_one(pval, it);
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asn1_enc_init(pval, it);
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}
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for (i = 0, tt = it->templates; i < it->tcount; tt++, i++) {
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pseqval = asn1_get_field_ptr(pval, tt);
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if (!ASN1_template_new(pseqval, tt))
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goto memerr2;
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}
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if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it, NULL))
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goto auxerr2;
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break;
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}
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#ifdef CRYPTO_MDEBUG
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if (it->sname)
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CRYPTO_pop_info();
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#endif
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return 1;
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memerr2:
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asn1_item_combine_free(pval, it, combine);
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memerr:
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OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
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#ifdef CRYPTO_MDEBUG
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if (it->sname)
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CRYPTO_pop_info();
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#endif
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return 0;
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auxerr2:
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asn1_item_combine_free(pval, it, combine);
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auxerr:
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OPENSSL_PUT_ERROR(ASN1, ASN1_R_AUX_ERROR);
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#ifdef CRYPTO_MDEBUG
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if (it->sname)
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CRYPTO_pop_info();
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#endif
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return 0;
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}
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static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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const ASN1_EXTERN_FUNCS *ef;
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switch (it->itype) {
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case ASN1_ITYPE_EXTERN:
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ef = it->funcs;
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if (ef && ef->asn1_ex_clear)
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ef->asn1_ex_clear(pval, it);
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else
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*pval = NULL;
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break;
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case ASN1_ITYPE_PRIMITIVE:
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if (it->templates)
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asn1_template_clear(pval, it->templates);
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else
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asn1_primitive_clear(pval, it);
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break;
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case ASN1_ITYPE_MSTRING:
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asn1_primitive_clear(pval, it);
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break;
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case ASN1_ITYPE_COMPAT:
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case ASN1_ITYPE_CHOICE:
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case ASN1_ITYPE_SEQUENCE:
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case ASN1_ITYPE_NDEF_SEQUENCE:
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*pval = NULL;
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break;
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}
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}
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int ASN1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
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{
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const ASN1_ITEM *it = ASN1_ITEM_ptr(tt->item);
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int ret;
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if (tt->flags & ASN1_TFLG_OPTIONAL) {
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asn1_template_clear(pval, tt);
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return 1;
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}
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/* If ANY DEFINED BY nothing to do */
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if (tt->flags & ASN1_TFLG_ADB_MASK) {
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*pval = NULL;
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return 1;
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}
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#ifdef CRYPTO_MDEBUG
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if (tt->field_name)
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CRYPTO_push_info(tt->field_name);
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#endif
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/* If SET OF or SEQUENCE OF, its a STACK */
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if (tt->flags & ASN1_TFLG_SK_MASK) {
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STACK_OF(ASN1_VALUE) *skval;
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skval = sk_ASN1_VALUE_new_null();
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if (!skval) {
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OPENSSL_PUT_ERROR(ASN1, ERR_R_MALLOC_FAILURE);
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ret = 0;
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goto done;
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}
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*pval = (ASN1_VALUE *)skval;
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ret = 1;
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goto done;
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}
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/* Otherwise pass it back to the item routine */
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ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
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done:
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#ifdef CRYPTO_MDEBUG
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if (it->sname)
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CRYPTO_pop_info();
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#endif
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return ret;
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}
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static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
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{
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/* If ADB or STACK just NULL the field */
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if (tt->flags & (ASN1_TFLG_ADB_MASK | ASN1_TFLG_SK_MASK))
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*pval = NULL;
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else
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asn1_item_clear(pval, ASN1_ITEM_ptr(tt->item));
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}
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/*
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* NB: could probably combine most of the real XXX_new() behaviour and junk
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* all the old functions.
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*/
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int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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ASN1_TYPE *typ;
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ASN1_STRING *str;
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int utype;
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if (!it)
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return 0;
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if (it->funcs) {
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const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
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if (pf->prim_new)
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return pf->prim_new(pval, it);
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}
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if (it->itype == ASN1_ITYPE_MSTRING)
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utype = -1;
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else
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utype = it->utype;
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switch (utype) {
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case V_ASN1_OBJECT:
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*pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
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return 1;
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case V_ASN1_BOOLEAN:
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*(ASN1_BOOLEAN *)pval = it->size;
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return 1;
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case V_ASN1_NULL:
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*pval = (ASN1_VALUE *)1;
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return 1;
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case V_ASN1_ANY:
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typ = OPENSSL_malloc(sizeof(ASN1_TYPE));
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if (!typ)
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return 0;
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typ->value.ptr = NULL;
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typ->type = -1;
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*pval = (ASN1_VALUE *)typ;
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break;
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default:
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str = ASN1_STRING_type_new(utype);
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if (it->itype == ASN1_ITYPE_MSTRING && str)
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str->flags |= ASN1_STRING_FLAG_MSTRING;
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*pval = (ASN1_VALUE *)str;
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break;
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}
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if (*pval)
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return 1;
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return 0;
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}
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static void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
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{
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int utype;
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if (it && it->funcs) {
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const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
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if (pf->prim_clear)
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pf->prim_clear(pval, it);
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else
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*pval = NULL;
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return;
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}
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if (!it || (it->itype == ASN1_ITYPE_MSTRING))
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utype = -1;
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else
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utype = it->utype;
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if (utype == V_ASN1_BOOLEAN)
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*(ASN1_BOOLEAN *)pval = it->size;
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else
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*pval = NULL;
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}
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