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|
/* pcy_tree.c */
/* Written by Dr Stephen N Henson (shenson@bigfoot.com) for the OpenSSL
* project 2004.
*/
/* ====================================================================
* Copyright (c) 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 "cryptlib.h"
#include <openssl/x509.h>
#include <openssl/x509v3.h>
#include "pcy_int.h"
/* Initialize policy tree. Return values:
* 0 Some internal error occured.
* -1 Inconsistent or invalid extensions in certificates.
* 1 Tree initialized OK.
* 2 Policy tree is empty.
* 5 Tree OK and requireExplicitPolicy true.
* 6 Tree empty and requireExplicitPolicy true.
*/
static int tree_init(X509_POLICY_TREE **ptree, STACK_OF(X509) *certs,
unsigned int flags)
{
X509_POLICY_TREE *tree;
X509_POLICY_LEVEL *level;
const X509_POLICY_CACHE *cache;
X509_POLICY_DATA *data = NULL;
X509 *x;
int ret = 1;
int i, n;
int explicit_policy;
int any_skip;
int map_skip;
*ptree = NULL;
n = sk_X509_num(certs);
/* Disable policy mapping for now... */
flags |= X509_V_FLAG_INHIBIT_MAP;
if (flags & X509_V_FLAG_EXPLICIT_POLICY)
explicit_policy = 0;
else
explicit_policy = n + 1;
if (flags & X509_V_FLAG_INHIBIT_ANY)
any_skip = 0;
else
any_skip = n + 1;
if (flags & X509_V_FLAG_INHIBIT_MAP)
map_skip = 0;
else
map_skip = n + 1;
/* Can't do anything with just a trust anchor */
if (n == 1)
return 1;
/* First setup policy cache in all certificates apart from the
* trust anchor. Note any bad cache results on the way. Also can
* calculate explicit_policy value at this point.
*/
for (i = n - 2; i >= 0; i--)
{
x = sk_X509_value(certs, i);
X509_check_purpose(x, -1, -1);
cache = policy_cache_set(x);
/* If cache NULL something bad happened: return immediately */
if (cache == NULL)
return 0;
/* If inconsistent extensions keep a note of it but continue */
if (x->ex_flags & EXFLAG_INVALID_POLICY)
ret = -1;
/* Otherwise if we have no data (hence no CertificatePolicies)
* and haven't already set an inconsistent code note it.
*/
else if ((ret == 1) && !cache->data)
ret = 2;
if (explicit_policy > 0)
{
explicit_policy--;
if (!(x->ex_flags & EXFLAG_SS)
&& (cache->explicit_skip != -1)
&& (cache->explicit_skip < explicit_policy))
explicit_policy = cache->explicit_skip;
}
}
if (ret != 1)
{
if (ret == 2 && !explicit_policy)
return 6;
return ret;
}
/* If we get this far initialize the tree */
tree = OPENSSL_malloc(sizeof(X509_POLICY_TREE));
if (!tree)
return 0;
tree->flags = 0;
tree->levels = OPENSSL_malloc(sizeof(X509_POLICY_LEVEL) * n);
tree->nlevel = 0;
tree->extra_data = NULL;
tree->auth_policies = NULL;
tree->user_policies = NULL;
if (!tree)
{
OPENSSL_free(tree);
return 0;
}
memset(tree->levels, 0, n * sizeof(X509_POLICY_LEVEL));
tree->nlevel = n;
level = tree->levels;
/* Root data: initialize to anyPolicy */
data = policy_data_new(NULL, OBJ_nid2obj(NID_any_policy), 0);
if (!data || !level_add_node(level, data, NULL, tree))
goto bad_tree;
for (i = n - 2; i >= 0; i--)
{
level++;
x = sk_X509_value(certs, i);
cache = policy_cache_set(x);
CRYPTO_add(&x->references, 1, CRYPTO_LOCK_X509);
level->cert = x;
if (!cache->anyPolicy)
level->flags |= X509_V_FLAG_INHIBIT_ANY;
/* Determine inhibit any and inhibit map flags */
if (any_skip == 0)
{
/* Any matching allowed if certificate is self
* issued and not the last in the chain.
*/
if (!(x->ex_flags && EXFLAG_SS) || (i == 0))
level->flags |= X509_V_FLAG_INHIBIT_ANY;
}
else
{
any_skip--;
if ((cache->any_skip > 0)
&& (cache->any_skip < any_skip))
any_skip = cache->any_skip;
}
if (map_skip == 0)
level->flags |= X509_V_FLAG_INHIBIT_MAP;
else
{
map_skip--;
if ((cache->map_skip > 0)
&& (cache->map_skip < map_skip))
map_skip = cache->map_skip;
}
}
*ptree = tree;
if (explicit_policy)
return 1;
else
return 5;
bad_tree:
X509_policy_tree_free(tree);
return 0;
}
/* This corresponds to RFC3280 XXXX XXXXX:
* link any data from CertificatePolicies onto matching parent
* or anyPolicy if no match.
*/
static int tree_link_nodes(X509_POLICY_LEVEL *curr,
const X509_POLICY_CACHE *cache)
{
int i;
X509_POLICY_LEVEL *last;
X509_POLICY_DAT
|