/*

 * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project

 * 1999.

 */

/* ====================================================================

 * Copyright (c) 1999 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 <stdio.h>

#include <string.h>

#include <openssl/asn1.h>

#include <openssl/asn1t.h>

#include <openssl/conf.h>

#include <openssl/err.h>

#include <openssl/obj.h>

#include <openssl/x509v3.h>

#include "internal.h"

static STACK_OF(CONF_VALUE) *i2v_BASIC_CONSTRAINTS(

    const X509V3_EXT_METHOD *method, void *ext, STACK_OF(CONF_VALUE) *extlist);

static void *v2i_BASIC_CONSTRAINTS(const X509V3_EXT_METHOD *method,

                                   const X509V3_CTX *ctx,

                                   const STACK_OF(CONF_VALUE) *values);

const X509V3_EXT_METHOD v3_bcons = {

    NID_basic_constraints,

    0,

    ASN1_ITEM_ref(BASIC_CONSTRAINTS),

    0,

    0,

    0,

    0,

    0,

    0,

    i2v_BASIC_CONSTRAINTS,

    v2i_BASIC_CONSTRAINTS,

    NULL,

    NULL,

    NULL,

};

ASN1_SEQUENCE(BASIC_CONSTRAINTS) = {

    ASN1_OPT(BASIC_CONSTRAINTS, ca, ASN1_FBOOLEAN),

    ASN1_OPT(BASIC_CONSTRAINTS, pathlen, ASN1_INTEGER),

} ASN1_SEQUENCE_END(BASIC_CONSTRAINTS)

IMPLEMENT_ASN1_FUNCTIONS_const(BASIC_CONSTRAINTS)

static STACK_OF(CONF_VALUE) *i2v_BASIC_CONSTRAINTS(

    const X509V3_EXT_METHOD *method, void *ext, STACK_OF(CONF_VALUE) *extlist) {

  const BASIC_CONSTRAINTS *bcons = ext;

  X509V3_add_value_bool("CA", bcons->ca, &extlist);

  X509V3_add_value_int("pathlen", bcons->pathlen, &extlist);

  return extlist;

}

static void *v2i_BASIC_CONSTRAINTS(const X509V3_EXT_METHOD *method,

                                   const X509V3_CTX *ctx,

                                   const STACK_OF(CONF_VALUE) *values) {

  BASIC_CONSTRAINTS *bcons = NULL;

  if (!(bcons = BASIC_CONSTRAINTS_new())) {

    return NULL;

  }

  for (size_t i = 0; i < sk_CONF_VALUE_num(values); i++) {

    const CONF_VALUE *val = sk_CONF_VALUE_value(values, i);

    if (!strcmp(val->name, "CA")) {

      if (!X509V3_get_value_bool(val, &bcons->ca)) {

        goto err;

      }

    } else if (!strcmp(val->name, "pathlen")) {

      if (!X509V3_get_value_int(val, &bcons->pathlen)) {

        goto err;

      }

    } else {

      OPENSSL_PUT_ERROR(X509V3, X509V3_R_INVALID_NAME);

      X509V3_conf_err(val);

      goto err;

    }

  }

  return bcons;

err:

  BASIC_CONSTRAINTS_free(bcons);

  return NULL;

}