text: /*
   * Copyright 1999-2016 The Opentls Project Authors. All Rights Reserved.
   *
   * Licensed under the Apache License 2.0 (the "License").  You may not use
   * this file except in compliance with the License.  You can obtain a copy
   * in the file LICENSE in the source distribution or at
   * https://www.opentls.org/source/license.html
   */
  
  #include <stdio.h>
  #include "internal/cryptlib.h"
  #include <opentls/asn1t.h>
  #include <opentls/conf.h>
  #include <opentls/x509v3.h>
  #include "ext_dat.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 = {
      NID_ext_key_usage, 0,
      ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
      0, 0, 0, 0,
      0, 0,
      i2v_EXTENDED_KEY_USAGE,
      v2i_EXTENDED_KEY_USAGE,
      0, 0,
      NULL
  };
  
  /* NB OCSP acceptable responses also is a SEQUENCE OF OBJECT */
  const X509V3_EXT_METHOD v3_ocsp_accresp = {
      NID_id_pkix_OCSP_acceptableResponses, 0,
      ASN1_ITEM_ref(EXTENDED_KEY_USAGE),
      0, 0, 0, 0,
      0, 0,
      i2v_EXTENDED_KEY_USAGE,
      v2i_EXTENDED_KEY_USAGE,
      0, 0,
      NULL
  };
  
  ASN1_ITEM_TEMPLATE(EXTENDED_KEY_USAGE) =
          ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, EXTENDED_KEY_USAGE, ASN1_OBJECT)
  ASN1_ITEM_TEMPLATE_END(EXTENDED_KEY_USAGE)
  
  IMPLEMENT_ASN1_FUNCTIONS(EXTENDED_KEY_USAGE)
  
  static STACK_OF(CONF_VALUE) *i2v_EXTENDED_KEY_USAGE(const X509V3_EXT_METHOD
                                                      *method, void *a, STACK_OF(CONF_VALUE)
                                                      *ext_list)
  {
      EXTENDED_KEY_USAGE *eku = a;
      int i;
      ASN1_OBJECT *obj;
      char obj_tmp[80];
      for (i = 0; i < sk_ASN1_OBJECT_num(eku); i++) {
          obj = sk_ASN1_OBJECT_value(eku, i);
          i2t_ASN1_OBJECT(obj_tmp, 80, obj);
          X509V3_add_value(NULL, obj_tmp, &ext_list);
      }
      return ext_list;
  }
  
  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;
      const int num = sk_CONF_VALUE_num(nval);
      int i;
  
      extku = sk_ASN1_OBJECT_new_reserve(NULL, num);
      if (extku == NULL) {
          X509V3err(X509V3_F_V2I_EXTENDED_KEY_USAGE, ERR_R_MALLOC_FAILURE);
          sk_ASN1_OBJECT_free(extku);
          return NULL;
      }
  
      for (i = 0; i < num; i++) {
          val = sk_CONF_VALUE_value(nval, i);
          if (val->value)
              extval = val->value;
          else
              extval = val->name;
          if ((objtmp = OBJ_txt2obj(extval, 0)) == NULL) {
              sk_ASN1_OBJECT_pop_free(extku, ASN1_OBJECT_free);
              X509V3err(X509V3_F_V2I_EXTENDED_KEY_USAGE,
                        X509V3_R_INVALID_OBJECT_IDENTIFIER);
              X509V3_conf_err(val);
              return NULL;
          }
          sk_ASN1_OBJECT_push(extku, objtmp);  /* no failure as it was reserved */
      }
      return extku;
  }
  