text: /* 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/mem.h>
  #include <openssl/obj.h>
  #include <openssl/x509.h>
  #include <openssl/x509v3.h>
  
  #include "pcy_int.h"
  
  static int node_cmp(const X509_POLICY_NODE **a, const X509_POLICY_NODE **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;
      size_t idx;
  
      n.valid_policy = (ASN1_OBJECT *)id;
      l.data = &n;
  
      sk_X509_POLICY_NODE_sort(nodes);
      if (!sk_X509_POLICY_NODE_find(nodes, &idx, &l))
          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;
      size_t 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,
                                   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)
  {
      size_t 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;
  
  }
  