/* $OpenBSD: x509_pcons.c,v 1.1 2020/06/04 15:19:32 jsing Exp $ */

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

 * project.

 */

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

 * Copyright (c) 2003 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/x509v3.h>

static STACK_OF(CONF_VALUE) *

i2v_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *bcons,

    STACK_OF(CONF_VALUE) *extlist);

static void *v2i_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method,

    X509V3_CTX *ctx, STACK_OF(CONF_VALUE) *values);

const X509V3_EXT_METHOD v3_policy_constraints = {

  .ext_nid = NID_policy_constraints,

  .ext_flags = 0,

  .it = &POLICY_CONSTRAINTS_it,

  .ext_new = NULL,

  .ext_free = NULL,

  .d2i = NULL,

  .i2d = NULL,

  .i2s = NULL,

  .s2i = NULL,

  .i2v = i2v_POLICY_CONSTRAINTS,

  .v2i = v2i_POLICY_CONSTRAINTS,

  .i2r = NULL,

  .r2i = NULL,

  .usr_data = NULL,

};

static const ASN1_TEMPLATE POLICY_CONSTRAINTS_seq_tt[] = {

  {

    .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,

    .tag = 0,

    .offset = offsetof(POLICY_CONSTRAINTS, requireExplicitPolicy),

    .field_name = "requireExplicitPolicy",

    .item = &ASN1_INTEGER_it,

  },

  {

    .flags = ASN1_TFLG_IMPLICIT | ASN1_TFLG_OPTIONAL,

    .tag = 1,

    .offset = offsetof(POLICY_CONSTRAINTS, inhibitPolicyMapping),

    .field_name = "inhibitPolicyMapping",

    .item = &ASN1_INTEGER_it,

  },

};

const ASN1_ITEM POLICY_CONSTRAINTS_it = {

  .itype = ASN1_ITYPE_SEQUENCE,

  .utype = V_ASN1_SEQUENCE,

  .templates = POLICY_CONSTRAINTS_seq_tt,

  .tcount = sizeof(POLICY_CONSTRAINTS_seq_tt) / sizeof(ASN1_TEMPLATE),

  .funcs = NULL,

  .size = sizeof(POLICY_CONSTRAINTS),

  .sname = "POLICY_CONSTRAINTS",

};

POLICY_CONSTRAINTS *

POLICY_CONSTRAINTS_new(void)

{

  return (POLICY_CONSTRAINTS*)ASN1_item_new(&POLICY_CONSTRAINTS_it);

}

void

POLICY_CONSTRAINTS_free(POLICY_CONSTRAINTS *a)

{

  ASN1_item_free((ASN1_VALUE *)a, &POLICY_CONSTRAINTS_it);

}

static STACK_OF(CONF_VALUE) *

i2v_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method, void *a,

    STACK_OF(CONF_VALUE) *extlist)

{

  POLICY_CONSTRAINTS *pcons = a;

  STACK_OF(CONF_VALUE) *free_extlist = NULL;

  if (extlist == NULL) {

    if ((free_extlist = extlist = sk_CONF_VALUE_new_null()) == NULL)

      return NULL;

  }

  if (!X509V3_add_value_int("Require Explicit Policy",

      pcons->requireExplicitPolicy, &extlist))

    goto err;

  if (!X509V3_add_value_int("Inhibit Policy Mapping",

      pcons->inhibitPolicyMapping, &extlist))

    goto err;

  return extlist;

 err:

  sk_CONF_VALUE_pop_free(free_extlist, X509V3_conf_free);

  return NULL;

}

static void *

v2i_POLICY_CONSTRAINTS(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,

    STACK_OF(CONF_VALUE) *values)

{

  POLICY_CONSTRAINTS *pcons = NULL;

  CONF_VALUE *val;

  int i;

  if (!(pcons = POLICY_CONSTRAINTS_new())) {

    X509V3error(ERR_R_MALLOC_FAILURE);

    return NULL;

  }

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

    val = sk_CONF_VALUE_value(values, i);

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

      if (!X509V3_get_value_int(val,

          &pcons->requireExplicitPolicy)) goto err;

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

      if (!X509V3_get_value_int(val,

          &pcons->inhibitPolicyMapping)) goto err;

    } else {

      X509V3error(X509V3_R_INVALID_NAME);

      X509V3_conf_err(val);

      goto err;

    }

  }

  if (!pcons->inhibitPolicyMapping && !pcons->requireExplicitPolicy) {

    X509V3error(X509V3_R_ILLEGAL_EMPTY_EXTENSION);

    goto err;

  }

  return pcons;

err:

  POLICY_CONSTRAINTS_free(pcons);

  return NULL;

}