diff options
Diffstat (limited to 'openssl/crypto/asn1/tasn_fre.c')
| -rw-r--r-- | openssl/crypto/asn1/tasn_fre.c | 249 |
1 files changed, 249 insertions, 0 deletions
diff --git a/openssl/crypto/asn1/tasn_fre.c b/openssl/crypto/asn1/tasn_fre.c new file mode 100644 index 0000000..aeea4ef --- /dev/null +++ b/openssl/crypto/asn1/tasn_fre.c @@ -0,0 +1,249 @@ +/* tasn_fre.c */ +/* + * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project + * 2000. + */ +/* ==================================================================== + * Copyright (c) 2000 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/asn1t.h> +#include <openssl/objects.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) +{ + int 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; +} |