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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 <string.h>
-
- #include <openssl/asn1t.h>
- #include <openssl/mem.h>
- #include <openssl/obj.h>
- #include <openssl/err.h>
- #include <openssl/thread.h>
-
- #include "../internal.h"
-
-
- /* Utility functions for manipulating fields and offsets */
-
- /* Add 'offset' to 'addr' */
- #define offset2ptr(addr, offset) (void *)(((char *) addr) + offset)
-
- /* Given an ASN1_ITEM CHOICE type return the selector value */
- int asn1_get_choice_selector(ASN1_VALUE **pval, const ASN1_ITEM *it) {
- int *sel = offset2ptr(*pval, it->utype);
- return *sel;
- }
-
- /* Given an ASN1_ITEM CHOICE type set the selector value, return old value. */
- int asn1_set_choice_selector(ASN1_VALUE **pval, int value,
- const ASN1_ITEM *it) {
- int *sel, ret;
- sel = offset2ptr(*pval, it->utype);
- ret = *sel;
- *sel = value;
- return ret;
- }
-
- static CRYPTO_refcount_t *asn1_get_references(ASN1_VALUE **pval,
- const ASN1_ITEM *it) {
- if (it->itype != ASN1_ITYPE_SEQUENCE &&
- it->itype != ASN1_ITYPE_NDEF_SEQUENCE) {
- return NULL;
- }
- const ASN1_AUX *aux = it->funcs;
- if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT)) {
- return NULL;
- }
- return offset2ptr(*pval, aux->ref_offset);
- }
-
- void asn1_refcount_set_one(ASN1_VALUE **pval, const ASN1_ITEM *it) {
- CRYPTO_refcount_t *references = asn1_get_references(pval, it);
- if (references != NULL) {
- *references = 1;
- }
- }
-
- int asn1_refcount_dec_and_test_zero(ASN1_VALUE **pval, const ASN1_ITEM *it) {
- CRYPTO_refcount_t *references = asn1_get_references(pval, it);
- if (references != NULL) {
- return CRYPTO_refcount_dec_and_test_zero(references);
- }
- return 1;
- }
-
- static ASN1_ENCODING *asn1_get_enc_ptr(ASN1_VALUE **pval, const ASN1_ITEM *it) {
- const ASN1_AUX *aux;
- if (!pval || !*pval) {
- return NULL;
- }
- aux = it->funcs;
- if (!aux || !(aux->flags & ASN1_AFLG_ENCODING)) {
- return NULL;
- }
- return offset2ptr(*pval, aux->enc_offset);
- }
-
- void asn1_enc_init(ASN1_VALUE **pval, const ASN1_ITEM *it) {
- ASN1_ENCODING *enc;
- enc = asn1_get_enc_ptr(pval, it);
- if (enc) {
- enc->enc = NULL;
- enc->len = 0;
- enc->modified = 1;
- }
- }
-
- void asn1_enc_free(ASN1_VALUE **pval, const ASN1_ITEM *it) {
- ASN1_ENCODING *enc;
- enc = asn1_get_enc_ptr(pval, it);
- if (enc) {
- if (enc->enc) {
- OPENSSL_free(enc->enc);
- }
- enc->enc = NULL;
- enc->len = 0;
- enc->modified = 1;
- }
- }
-
- int asn1_enc_save(ASN1_VALUE **pval, const unsigned char *in, int inlen,
- const ASN1_ITEM *it) {
- ASN1_ENCODING *enc;
- enc = asn1_get_enc_ptr(pval, it);
- if (!enc) {
- return 1;
- }
-
- if (enc->enc) {
- OPENSSL_free(enc->enc);
- }
- enc->enc = OPENSSL_malloc(inlen);
- if (!enc->enc) {
- return 0;
- }
- memcpy(enc->enc, in, inlen);
- enc->len = inlen;
- enc->modified = 0;
-
- return 1;
- }
-
- int asn1_enc_restore(int *len, unsigned char **out, ASN1_VALUE **pval,
- const ASN1_ITEM *it) {
- ASN1_ENCODING *enc;
- enc = asn1_get_enc_ptr(pval, it);
- if (!enc || enc->modified) {
- return 0;
- }
- if (out) {
- memcpy(*out, enc->enc, enc->len);
- *out += enc->len;
- }
- if (len) {
- *len = enc->len;
- }
- return 1;
- }
-
- /* Given an ASN1_TEMPLATE get a pointer to a field */
- ASN1_VALUE **asn1_get_field_ptr(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt) {
- ASN1_VALUE **pvaltmp;
- if (tt->flags & ASN1_TFLG_COMBINE) {
- return pval;
- }
- pvaltmp = offset2ptr(*pval, tt->offset);
- /* NOTE for BOOLEAN types the field is just a plain int so we can't return
- * int **, so settle for (int *). */
- return pvaltmp;
- }
-
- /* Handle ANY DEFINED BY template, find the selector, look up the relevant
- * ASN1_TEMPLATE in the table and return it. */
- const ASN1_TEMPLATE *asn1_do_adb(ASN1_VALUE **pval, const ASN1_TEMPLATE *tt,
- int nullerr) {
- const ASN1_ADB *adb;
- const ASN1_ADB_TABLE *atbl;
- long selector;
- ASN1_VALUE **sfld;
- int i;
- if (!(tt->flags & ASN1_TFLG_ADB_MASK)) {
- return tt;
- }
-
- /* Else ANY DEFINED BY ... get the table */
- adb = ASN1_ADB_ptr(tt->item);
-
- /* Get the selector field */
- sfld = offset2ptr(*pval, adb->offset);
-
- /* Check if NULL */
- if (!sfld) {
- if (!adb->null_tt) {
- goto err;
- }
- return adb->null_tt;
- }
-
- /* Convert type to a long:
- * NB: don't check for NID_undef here because it
- * might be a legitimate value in the table */
- if (tt->flags & ASN1_TFLG_ADB_OID) {
- selector = OBJ_obj2nid((ASN1_OBJECT *)*sfld);
- } else {
- selector = ASN1_INTEGER_get((ASN1_INTEGER *)*sfld);
- }
-
- /* Try to find matching entry in table Maybe should check application types
- * first to allow application override? Might also be useful to have a flag
- * which indicates table is sorted and we can do a binary search. For now
- * stick to a linear search. */
-
- for (atbl = adb->tbl, i = 0; i < adb->tblcount; i++, atbl++) {
- if (atbl->value == selector) {
- return &atbl->tt;
- }
- }
-
- /* FIXME: need to search application table too */
-
- /* No match, return default type */
- if (!adb->default_tt) {
- goto err;
- }
- return adb->default_tt;
-
- err:
- /* FIXME: should log the value or OID of unsupported type */
- if (nullerr) {
- OPENSSL_PUT_ERROR(ASN1, ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE);
- }
- return NULL;
- }
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