mirror of https://github.com/openssl/openssl.git
324 lines
8.2 KiB
C
324 lines
8.2 KiB
C
/*
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* Copyright 2000-2020 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the Apache License 2.0 (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stddef.h>
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#include <openssl/asn1.h>
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#include <openssl/objects.h>
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#include <openssl/err.h>
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#include <openssl/asn1t.h>
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#include <string.h>
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#include "asn1_local.h"
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static int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
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int embed);
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static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
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int embed);
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static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
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static int asn1_template_new(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
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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_embed_new(pval, it, 0);
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}
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int asn1_item_embed_new(ASN1_VALUE **pval, const ASN1_ITEM *it, int embed)
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{
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const ASN1_TEMPLATE *tt = NULL;
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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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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_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, embed))
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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, embed))
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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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return 1;
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}
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}
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if (embed) {
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memset(*pval, 0, it->size);
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} else {
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*pval = OPENSSL_zalloc(it->size);
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if (*pval == NULL)
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goto memerr;
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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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return 1;
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}
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}
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if (embed) {
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memset(*pval, 0, it->size);
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} else {
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*pval = OPENSSL_zalloc(it->size);
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if (*pval == NULL)
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goto memerr;
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}
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/* 0 : init. lock */
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if (asn1_do_lock(pval, 0, it) < 0) {
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if (!embed) {
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OPENSSL_free(*pval);
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*pval = NULL;
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}
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goto memerr;
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}
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asn1_enc_init(pval, it);
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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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return 1;
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memerr2:
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asn1_item_embed_free(pval, it, embed);
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memerr:
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ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
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return 0;
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auxerr2:
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asn1_item_embed_free(pval, it, embed);
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auxerr:
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ERR_raise(ERR_LIB_ASN1, ASN1_R_AUX_ERROR);
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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_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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static 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 embed = tt->flags & ASN1_TFLG_EMBED;
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ASN1_VALUE *tval;
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int ret;
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if (embed) {
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tval = (ASN1_VALUE *)pval;
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pval = &tval;
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}
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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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/* 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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ERR_raise(ERR_LIB_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_embed_new(pval, it, embed);
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done:
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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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static int asn1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
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int embed)
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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 (embed) {
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if (pf->prim_clear) {
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pf->prim_clear(pval, it);
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return 1;
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}
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} else if (pf->prim_new) {
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return pf->prim_new(pval, it);
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}
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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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if ((typ = OPENSSL_malloc(sizeof(*typ))) == NULL) {
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ERR_raise(ERR_LIB_ASN1, ERR_R_MALLOC_FAILURE);
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return 0;
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}
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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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if (embed) {
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str = *(ASN1_STRING **)pval;
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memset(str, 0, sizeof(*str));
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str->type = utype;
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str->flags = ASN1_STRING_FLAG_EMBED;
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} else {
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str = ASN1_STRING_type_new(utype);
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*pval = (ASN1_VALUE *)str;
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}
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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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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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