--- /dev/null
+/* 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 <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->alias_only = 0;
+ enc->alias_only_on_next_parse = 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 && !enc->alias_only) {
+ OPENSSL_free(enc->enc);
+ }
+ enc->enc = NULL;
+ enc->len = 0;
+ enc->alias_only = 0;
+ enc->alias_only_on_next_parse = 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->alias_only) {
+ OPENSSL_free(enc->enc);
+ }
+
+ enc->alias_only = enc->alias_only_on_next_parse;
+ enc->alias_only_on_next_parse = 0;
+
+ if (enc->alias_only) {
+ enc->enc = (uint8_t *) in;
+ } else {
+ enc->enc = OPENSSL_malloc(inlen);
+ if (!enc->enc) {
+ return 0;
+ }
+ OPENSSL_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) {
+ OPENSSL_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 == NULL) {
+ 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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