tasn_new.c
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上传日期:2020-08-09
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文件大小:9k
- /* tasn_new.c */
- /* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
- * project 2000.
- */
- /* ====================================================================
- * Copyright (c) 2000-2004 The OpenSSL Project. All rights reserved.
- *
- * 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 above 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 acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit. (http://www.OpenSSL.org/)"
- *
- * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * licensing@OpenSSL.org.
- *
- * 5. Products derived from this software may not be called "OpenSSL"
- * nor may "OpenSSL" appear in their names without prior written
- * permission of the OpenSSL Project.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the OpenSSL Project
- * for use in the OpenSSL Toolkit (http://www.OpenSSL.org/)"
- *
- * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
- * EXPRESSED 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 OpenSSL PROJECT OR
- * ITS 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.
- * ====================================================================
- *
- * This product includes cryptographic software written by Eric Young
- * (eay@cryptsoft.com). This product includes software written by Tim
- * Hudson (tjh@cryptsoft.com).
- *
- */
- #include <stddef.h>
- #include <openssl/asn1.h>
- #include <openssl/objects.h>
- #include <openssl/err.h>
- #include <openssl/asn1t.h>
- #include <string.h>
- static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
- int combine);
- static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it);
- static void asn1_template_clear(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt);
- 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)
- {
- return asn1_item_ex_combine_new(pval, it, 0);
- }
- static int asn1_item_ex_combine_new(ASN1_VALUE **pval, const ASN1_ITEM *it,
- int combine)
- {
- const ASN1_TEMPLATE *tt = NULL;
- const ASN1_COMPAT_FUNCS *cf;
- const ASN1_EXTERN_FUNCS *ef;
- const ASN1_AUX *aux = it->funcs;
- ASN1_aux_cb *asn1_cb;
- ASN1_VALUE **pseqval;
- int i;
- if (aux && aux->asn1_cb)
- asn1_cb = aux->asn1_cb;
- else
- asn1_cb = 0;
- if (!combine) *pval = NULL;
- #ifdef CRYPTO_MDEBUG
- if (it->sname)
- CRYPTO_push_info(it->sname);
- #endif
- 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_COMPAT:
- cf = it->funcs;
- if (cf && cf->asn1_new) {
- *pval = cf->asn1_new();
- if (!*pval)
- 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:
- if (asn1_cb)
- {
- i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
- if (!i)
- goto auxerr;
- if (i==2)
- {
- #ifdef CRYPTO_MDEBUG
- if (it->sname)
- CRYPTO_pop_info();
- #endif
- return 1;
- }
- }
- if (!combine)
- {
- *pval = OPENSSL_malloc(it->size);
- if (!*pval)
- goto memerr;
- memset(*pval, 0, it->size);
- }
- asn1_set_choice_selector(pval, -1, it);
- if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
- goto auxerr;
- break;
- case ASN1_ITYPE_NDEF_SEQUENCE:
- case ASN1_ITYPE_SEQUENCE:
- if (asn1_cb)
- {
- i = asn1_cb(ASN1_OP_NEW_PRE, pval, it);
- if (!i)
- goto auxerr;
- if (i==2)
- {
- #ifdef CRYPTO_MDEBUG
- if (it->sname)
- CRYPTO_pop_info();
- #endif
- return 1;
- }
- }
- if (!combine)
- {
- *pval = OPENSSL_malloc(it->size);
- if (!*pval)
- goto memerr;
- memset(*pval, 0, it->size);
- asn1_do_lock(pval, 0, 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 memerr;
- }
- if (asn1_cb && !asn1_cb(ASN1_OP_NEW_POST, pval, it))
- goto auxerr;
- break;
- }
- #ifdef CRYPTO_MDEBUG
- if (it->sname) CRYPTO_pop_info();
- #endif
- return 1;
- memerr:
- ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ERR_R_MALLOC_FAILURE);
- #ifdef CRYPTO_MDEBUG
- if (it->sname) CRYPTO_pop_info();
- #endif
- return 0;
- auxerr:
- ASN1err(ASN1_F_ASN1_ITEM_EX_COMBINE_NEW, ASN1_R_AUX_ERROR);
- ASN1_item_ex_free(pval, it);
- #ifdef CRYPTO_MDEBUG
- if (it->sname) CRYPTO_pop_info();
- #endif
- return 0;
- }
- static void asn1_item_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
- {
- const ASN1_EXTERN_FUNCS *ef;
- switch(it->itype)
- {
- case ASN1_ITYPE_EXTERN:
- ef = it->funcs;
- if (ef && ef->asn1_ex_clear)
- ef->asn1_ex_clear(pval, it);
- else *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_COMPAT:
- case ASN1_ITYPE_CHOICE:
- case ASN1_ITYPE_SEQUENCE:
- case ASN1_ITYPE_NDEF_SEQUENCE:
- *pval = NULL;
- break;
- }
- }
- 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;
- }
- #ifdef CRYPTO_MDEBUG
- if (tt->field_name)
- CRYPTO_push_info(tt->field_name);
- #endif
- /* 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)
- {
- ASN1err(ASN1_F_ASN1_TEMPLATE_NEW, ERR_R_MALLOC_FAILURE);
- ret = 0;
- goto done;
- }
- *pval = (ASN1_VALUE *)skval;
- ret = 1;
- goto done;
- }
- /* Otherwise pass it back to the item routine */
- ret = asn1_item_ex_combine_new(pval, it, tt->flags & ASN1_TFLG_COMBINE);
- done:
- #ifdef CRYPTO_MDEBUG
- if (it->sname)
- CRYPTO_pop_info();
- #endif
- 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.
- */
- int ASN1_primitive_new(ASN1_VALUE **pval, const ASN1_ITEM *it)
- {
- ASN1_TYPE *typ;
- int utype;
- if (it && it->funcs)
- {
- const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
- if (pf->prim_new)
- return pf->prim_new(pval, it);
- }
- if (!it || (it->itype == ASN1_ITYPE_MSTRING))
- utype = -1;
- else
- utype = it->utype;
- switch(utype)
- {
- case V_ASN1_OBJECT:
- *pval = (ASN1_VALUE *)OBJ_nid2obj(NID_undef);
- return 1;
- case V_ASN1_BOOLEAN:
- if (it)
- *(ASN1_BOOLEAN *)pval = it->size;
- else
- *(ASN1_BOOLEAN *)pval = -1;
- return 1;
- case V_ASN1_NULL:
- *pval = (ASN1_VALUE *)1;
- return 1;
- case V_ASN1_ANY:
- 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;
- }
- void asn1_primitive_clear(ASN1_VALUE **pval, const ASN1_ITEM *it)
- {
- int utype;
- if (it && it->funcs)
- {
- const ASN1_PRIMITIVE_FUNCS *pf = it->funcs;
- if (pf->prim_clear)
- pf->prim_clear(pval, it);
- else
- *pval = NULL;
- return;
- }
- if (!it || (it->itype == ASN1_ITYPE_MSTRING))
- utype = -1;
- else
- utype = it->utype;
- if (utype == V_ASN1_BOOLEAN)
- *(ASN1_BOOLEAN *)pval = it->size;
- else *pval = NULL;
- }