/* pcy_node.c */

/*

 * Written by Dr Stephen N Henson (steve@openssl.org) 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 <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;

}