| /* 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 <assert.h> |
| |
| #include <openssl/asn1t.h> |
| #include <openssl/mem.h> |
| |
| #include "internal.h" |
| |
| // 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); |
| } |
| |
| 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; |
| int i; |
| if (!pval) { |
| return; |
| } |
| if ((it->itype != ASN1_ITYPE_PRIMITIVE) && !*pval) { |
| return; |
| } |
| |
| 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: { |
| 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_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_EXTERN: |
| ef = it->funcs; |
| if (ef && ef->asn1_ex_free) { |
| ef->asn1_ex_free(pval, it); |
| } |
| break; |
| |
| case ASN1_ITYPE_SEQUENCE: { |
| if (!asn1_refcount_dec_and_test_zero(pval, it)) { |
| return; |
| } |
| 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_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; |
| // Historically, |it->funcs| for primitive types contained an |
| // |ASN1_PRIMITIVE_FUNCS| table of calbacks. |
| assert(it == NULL || it->funcs == NULL); |
| // 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 (utype != V_ASN1_BOOLEAN && !*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; |
| } |
