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- /* 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 <openssl/asn1t.h>
- #include <openssl/mem.h>
-
-
- static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine);
-
- /* Free up an ASN1 structure */
-
- void ASN1_item_free(ASN1_VALUE *val, const ASN1_ITEM *it)
- {
- asn1_item_combine_free(&val, it, 0);
- }
-
- void ASN1_item_ex_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
- {
- asn1_item_combine_free(pval, it, 0);
- }
-
- static void asn1_item_combine_free(ASN1_VALUE **pval, const ASN1_ITEM *it, int combine)
- {
- const ASN1_TEMPLATE *tt = NULL, *seqtt;
- const ASN1_EXTERN_FUNCS *ef;
- const ASN1_COMPAT_FUNCS *cf;
- const ASN1_AUX *aux = it->funcs;
- ASN1_aux_cb *asn1_cb;
- int i;
- if (!pval)
- return;
- if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval)
- return;
- if (aux && aux->asn1_cb)
- asn1_cb = aux->asn1_cb;
- else
- asn1_cb = 0;
-
- switch(it->itype)
- {
-
- case ASN1_ITYPE_PRIMITIVE:
- if (it->templates)
- ASN1_template_free(pval, it->templates);
- else
- ASN1_primitive_free(pval, it);
- break;
-
- case ASN1_ITYPE_MSTRING:
- ASN1_primitive_free(pval, it);
- break;
-
- case ASN1_ITYPE_CHOICE:
- if (asn1_cb)
- {
- i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
- if (i == 2)
- return;
- }
- i = asn1_get_choice_selector(pval, it);
- if ((i >= 0) && (i < it->tcount))
- {
- ASN1_VALUE **pchval;
- tt = it->templates + i;
- pchval = asn1_get_field_ptr(pval, tt);
- ASN1_template_free(pchval, tt);
- }
- if (asn1_cb)
- asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
- if (!combine)
- {
- OPENSSL_free(*pval);
- *pval = NULL;
- }
- break;
-
- case ASN1_ITYPE_COMPAT:
- cf = it->funcs;
- if (cf && cf->asn1_free)
- cf->asn1_free(*pval);
- break;
-
- case ASN1_ITYPE_EXTERN:
- ef = it->funcs;
- if (ef && ef->asn1_ex_free)
- ef->asn1_ex_free(pval, it);
- break;
-
- case ASN1_ITYPE_NDEF_SEQUENCE:
- case ASN1_ITYPE_SEQUENCE:
- if (asn1_do_lock(pval, -1, it) > 0)
- return;
- if (asn1_cb)
- {
- i = asn1_cb(ASN1_OP_FREE_PRE, pval, it, NULL);
- if (i == 2)
- return;
- }
- asn1_enc_free(pval, it);
- /* If we free up as normal we will invalidate any
- * ANY DEFINED BY field and we wont be able to
- * determine the type of the field it defines. So
- * free up in reverse order.
- */
- tt = it->templates + it->tcount - 1;
- for (i = 0; i < it->tcount; tt--, i++)
- {
- ASN1_VALUE **pseqval;
- seqtt = asn1_do_adb(pval, tt, 0);
- if (!seqtt)
- continue;
- pseqval = asn1_get_field_ptr(pval, seqtt);
- ASN1_template_free(pseqval, seqtt);
- }
- if (asn1_cb)
- asn1_cb(ASN1_OP_FREE_POST, pval, it, NULL);
- if (!combine)
- {
- OPENSSL_free(*pval);
- *pval = NULL;
- }
- break;
- }
- }
-
- void ASN1_template_free(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt)
- {
- size_t i;
- if (tt->flags & ASN1_TFLG_SK_MASK)
- {
- STACK_OF(ASN1_VALUE) *sk = (STACK_OF(ASN1_VALUE) *)*pval;
- for (i = 0; i < sk_ASN1_VALUE_num(sk); i++)
- {
- ASN1_VALUE *vtmp;
- vtmp = sk_ASN1_VALUE_value(sk, i);
- asn1_item_combine_free(&vtmp, ASN1_ITEM_ptr(tt->item),
- 0);
- }
- sk_ASN1_VALUE_free(sk);
- *pval = NULL;
- }
- else
- asn1_item_combine_free(pval, ASN1_ITEM_ptr(tt->item),
- tt->flags & ASN1_TFLG_COMBINE);
- }
-
- void ASN1_primitive_free(ASN1_VALUE **pval, const ASN1_ITEM *it)
- {
- int utype;
- if (it)
- {
- const ASN1_PRIMITIVE_FUNCS *pf;
- pf = it->funcs;
- if (pf && pf->prim_free)
- {
- pf->prim_free(pval, it);
- return;
- }
- }
- /* Special case: if 'it' is NULL free contents of ASN1_TYPE */
- if (!it)
- {
- ASN1_TYPE *typ = (ASN1_TYPE *)*pval;
- utype = typ->type;
- pval = &typ->value.asn1_value;
- if (!*pval)
- return;
- }
- else if (it->itype == ASN1_ITYPE_MSTRING)
- {
- utype = -1;
- if (!*pval)
- return;
- }
- else
- {
- utype = it->utype;
- if ((utype != V_ASN1_BOOLEAN) && !*pval)
- return;
- }
-
- switch(utype)
- {
- case V_ASN1_OBJECT:
- ASN1_OBJECT_free((ASN1_OBJECT *)*pval);
- break;
-
- case V_ASN1_BOOLEAN:
- if (it)
- *(ASN1_BOOLEAN *)pval = it->size;
- else
- *(ASN1_BOOLEAN *)pval = -1;
- return;
-
- case V_ASN1_NULL:
- break;
-
- case V_ASN1_ANY:
- ASN1_primitive_free(pval, NULL);
- OPENSSL_free(*pval);
- break;
-
- default:
- ASN1_STRING_free((ASN1_STRING *)*pval);
- *pval = NULL;
- break;
- }
- *pval = NULL;
- }
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