--- /dev/null
+/* tasn_utl.c */
+/* Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
+ * project 2000.
+ */
+/* ====================================================================
+ * Copyright (c) 2000-2004 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 <string.h>
+#include <openssl/asn1.h>
+#include <openssl/asn1t.h>
+#include <openssl/objects.h>
+#include <openssl/err.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;
+ }
+
+/* Do reference counting. The value 'op' decides what to do.
+ * if it is +1 then the count is incremented. If op is 0 count is
+ * set to 1. If op is -1 count is decremented and the return value
+ * is the current refrence count or 0 if no reference count exists.
+ */
+
+int asn1_do_lock(ASN1_VALUE **pval, int op, const ASN1_ITEM *it)
+ {
+ const ASN1_AUX *aux;
+ int *lck, ret;
+ if ((it->itype != ASN1_ITYPE_SEQUENCE)
+ && (it->itype != ASN1_ITYPE_NDEF_SEQUENCE))
+ return 0;
+ aux = it->funcs;
+ if (!aux || !(aux->flags & ASN1_AFLG_REFCOUNT))
+ return 0;
+ lck = offset2ptr(*pval, aux->ref_offset);
+ if (op == 0)
+ {
+ *lck = 1;
+ return 1;
+ }
+ ret = CRYPTO_add(lck, op, aux->ref_lock);
+#ifdef REF_PRINT
+ fprintf(stderr, "%s: Reference Count: %d\n", it->sname, *lck);
+#endif
+#ifdef REF_CHECK
+ if (ret < 0)
+ fprintf(stderr, "%s, bad reference count\n", it->sname);
+#endif
+ return ret;
+ }
+
+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)
+ ASN1err(ASN1_F_ASN1_DO_ADB,
+ ASN1_R_UNSUPPORTED_ANY_DEFINED_BY_TYPE);
+ return NULL;
+ }
projects / cassiopeia.git / blobdiff