pcy_node.c

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/* pcy_node.c */
/* Written by Dr Stephen N Henson ([email protected]) 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
 *    [email protected].
 *
 * 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
 * ([email protected]).  This product includes software written by Tim
 * Hudson ([email protected]).
 *
 */

#include <openssl/asn1.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>

#include "pcy_int.h"

static int node_cmp(const X509_POLICY_NODE * const *a,
            const X509_POLICY_NODE * const *b)
    {
    return OBJ_cmp((*a)->data->valid_policy, (*b)->data->valid_policy);
    }

STACK_OF(X509_POLICY_NODE) *policy_node_cmp_new(void)
    {
    return sk_X509_POLICY_NODE_new(node_cmp);
    }

X509_POLICY_NODE *tree_find_sk(STACK_OF(X509_POLICY_NODE) *nodes,
                    const ASN1_OBJECT *id)
    {
    X509_POLICY_DATA n;
    X509_POLICY_NODE l;
    int idx;

    n.valid_policy = (ASN1_OBJECT *)id;
    l.data = &n;

    idx = sk_X509_POLICY_NODE_find(nodes, &l);
    if (idx == -1)
        return NULL;

    return sk_X509_POLICY_NODE_value(nodes, idx);

    }

X509_POLICY_NODE *level_find_node(const X509_POLICY_LEVEL *level,
                    const X509_POLICY_NODE *parent, 
                    const ASN1_OBJECT *id)
    {
    X509_POLICY_NODE *node;
    int i;
    for (i = 0; i < sk_X509_POLICY_NODE_num(level->nodes); i++)
        {
        node = sk_X509_POLICY_NODE_value(level->nodes, i);
        if (node->parent == parent)
            {
            if (!OBJ_cmp(node->data->valid_policy, id))
                return node;
            }
        }
    return NULL;
    }

X509_POLICY_NODE *level_add_node(X509_POLICY_LEVEL *level,
            const X509_POLICY_DATA *data,
            X509_POLICY_NODE *parent,
            X509_POLICY_TREE *tree)
    {
    X509_POLICY_NODE *node;
    node = OPENSSL_malloc(sizeof(X509_POLICY_NODE));
    if (!node)
        return NULL;
    node->data = data;
    node->parent = parent;
    node->nchild = 0;
    if (level)
        {
        if (OBJ_obj2nid(data->valid_policy) == NID_any_policy)
            {
            if (level->anyPolicy)
                goto node_error;
            level->anyPolicy = node;
            }
        else
            {

            if (!level->nodes)
                level->nodes = policy_node_cmp_new();
            if (!level->nodes)
                goto node_error;
            if (!sk_X509_POLICY_NODE_push(level->nodes, node))
                goto node_error;
            }
        }

    if (tree)
        {
        if (!tree->extra_data)
             tree->extra_data = sk_X509_POLICY_DATA_new_null();
        if (!tree->extra_data)
            goto node_error;
        if (!sk_X509_POLICY_DATA_push(tree->extra_data, data))
            goto node_error;
        }

    if (parent)
        parent->nchild++;

    return node;

    node_error:
    policy_node_free(node);
    return 0;

    }

void policy_node_free(X509_POLICY_NODE *node)
    {
    OPENSSL_free(node);
    }

/* See if a policy node matches a policy OID. If mapping enabled look through
 * expected policy set otherwise just valid policy.
 */

int policy_node_match(const X509_POLICY_LEVEL *lvl,
              const X509_POLICY_NODE *node, const ASN1_OBJECT *oid)
    {
    int i;
    ASN1_OBJECT *policy_oid;
    const X509_POLICY_DATA *x = node->data;

    if (        (lvl->flags & X509_V_FLAG_INHIBIT_MAP)
        || !(x->flags & POLICY_DATA_FLAG_MAP_MASK))
        {
        if (!OBJ_cmp(x->valid_policy, oid))
            return 1;
        return 0;
        }

    for (i = 0; i < sk_ASN1_OBJECT_num(x->expected_policy_set); i++)
        {
        policy_oid = sk_ASN1_OBJECT_value(x->expected_policy_set, i);
        if (!OBJ_cmp(policy_oid, oid))
            return 1;
        }
    return 0;

    }