/* $OpenBSD: x509_extku.c,v 1.1 2020/06/04 15:19:31 jsing Exp $ */

/* 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 <openssl/asn1t.h>

#include <openssl/conf.h>

#include <openssl/err.h>

#include <openssl/x509v3.h>

static void *v2i_EXTENDED_KEY_USAGE(const X509V3_EXT_METHOD *method,

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

static STACK_OF(CONF_VALUE) *i2v_EXTENDED_KEY_USAGE(

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

const X509V3_EXT_METHOD v3_ext_ku = {

  .ext_nid = NID_ext_key_usage,

  .ext_flags = 0,

  .it = &EXTENDED_KEY_USAGE_it,

  .ext_new = NULL,

  .ext_free = NULL,

  .d2i = NULL,

  .i2d = NULL,

  .i2s = NULL,

  .s2i = NULL,

  .i2v = i2v_EXTENDED_KEY_USAGE,

  .v2i = v2i_EXTENDED_KEY_USAGE,

  .i2r = NULL,

  .r2i = NULL,

  .usr_data = NULL,

};

/* NB OCSP acceptable responses also is a SEQUENCE OF OBJECT */

const X509V3_EXT_METHOD v3_ocsp_accresp = {

  .ext_nid = NID_id_pkix_OCSP_acceptableResponses,

  .ext_flags = 0,

  .it = &EXTENDED_KEY_USAGE_it,

  .ext_new = NULL,

  .ext_free = NULL,

  .d2i = NULL,

  .i2d = NULL,

  .i2s = NULL,

  .s2i = NULL,

  .i2v = i2v_EXTENDED_KEY_USAGE,

  .v2i = v2i_EXTENDED_KEY_USAGE,

  .i2r = NULL,

  .r2i = NULL,

  .usr_data = NULL,

};

static const ASN1_TEMPLATE EXTENDED_KEY_USAGE_item_tt = {

  .flags = ASN1_TFLG_SEQUENCE_OF,

  .tag = 0,

  .offset = 0,

  .field_name = "EXTENDED_KEY_USAGE",

  .item = &ASN1_OBJECT_it,

};

const ASN1_ITEM EXTENDED_KEY_USAGE_it = {

  .itype = ASN1_ITYPE_PRIMITIVE,

  .utype = -1,

  .templates = &EXTENDED_KEY_USAGE_item_tt,

  .tcount = 0,

  .funcs = NULL,

  .size = 0,

  .sname = "EXTENDED_KEY_USAGE",

};

EXTENDED_KEY_USAGE *

d2i_EXTENDED_KEY_USAGE(EXTENDED_KEY_USAGE **a, const unsigned char **in, long len)

{

  return (EXTENDED_KEY_USAGE *)ASN1_item_d2i((ASN1_VALUE **)a, in, len,

      &EXTENDED_KEY_USAGE_it);

}

int

i2d_EXTENDED_KEY_USAGE(EXTENDED_KEY_USAGE *a, unsigned char **out)

{

  return ASN1_item_i2d((ASN1_VALUE *)a, out, &EXTENDED_KEY_USAGE_it);

}

EXTENDED_KEY_USAGE *

EXTENDED_KEY_USAGE_new(void)

{

  return (EXTENDED_KEY_USAGE *)ASN1_item_new(&EXTENDED_KEY_USAGE_it);

}

void

EXTENDED_KEY_USAGE_free(EXTENDED_KEY_USAGE *a)

{

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

}

static STACK_OF(CONF_VALUE) *

i2v_EXTENDED_KEY_USAGE(const X509V3_EXT_METHOD *method, void *a,

    STACK_OF(CONF_VALUE) *extlist)

{

  ASN1_OBJECT *obj;

  EXTENDED_KEY_USAGE *eku = a;

  STACK_OF(CONF_VALUE) *free_extlist = NULL;

  char obj_tmp[80];

  int i;

  if (extlist == NULL) {

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

      return NULL;

  }

  for (i = 0; i < sk_ASN1_OBJECT_num(eku); i++) {

    if ((obj = sk_ASN1_OBJECT_value(eku, i)) == NULL)

      goto err;

    if (!i2t_ASN1_OBJECT(obj_tmp, sizeof obj_tmp, obj))

      goto err;

    if (!X509V3_add_value(NULL, obj_tmp, &extlist))

      goto err;

  }

  return extlist;

 err:

  sk_CONF_VALUE_pop_free(free_extlist, X509V3_conf_free);

  return NULL;

}

static void *

v2i_EXTENDED_KEY_USAGE(const X509V3_EXT_METHOD *method, X509V3_CTX *ctx,

    STACK_OF(CONF_VALUE) *nval)

{

  EXTENDED_KEY_USAGE *extku;

  char *extval;

  ASN1_OBJECT *objtmp;

  CONF_VALUE *val;

  int i;

  if (!(extku = sk_ASN1_OBJECT_new_null())) {

    X509V3error(ERR_R_MALLOC_FAILURE);

    return NULL;

  }

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

    val = sk_CONF_VALUE_value(nval, i);

    if (val->value)

      extval = val->value;

    else

      extval = val->name;

    if (!(objtmp = OBJ_txt2obj(extval, 0))) {

      sk_ASN1_OBJECT_pop_free(extku, ASN1_OBJECT_free);

      X509V3error(X509V3_R_INVALID_OBJECT_IDENTIFIER);

      X509V3_conf_err(val);

      return NULL;

    }

    if (sk_ASN1_OBJECT_push(extku, objtmp) == 0) {

      ASN1_OBJECT_free(objtmp);

      sk_ASN1_OBJECT_pop_free(extku, ASN1_OBJECT_free);

      X509V3error(ERR_R_MALLOC_FAILURE);

      return NULL;

    }

  }

  return extku;

}