text: /*
   * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL project
   * 2000.
   */
  /* ====================================================================
   * Copyright (c) 2000 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 <CJWTKitBoringSSL_x509.h>
  
  #include <CJWTKitBoringSSL_asn1.h>
  #include <CJWTKitBoringSSL_asn1t.h>
  #include <CJWTKitBoringSSL_digest.h>
  #include <CJWTKitBoringSSL_obj.h>
  
  
  ASN1_SEQUENCE(X509_ALGOR) = {
          ASN1_SIMPLE(X509_ALGOR, algorithm, ASN1_OBJECT),
          ASN1_OPT(X509_ALGOR, parameter, ASN1_ANY)
  } ASN1_SEQUENCE_END(X509_ALGOR)
  
  ASN1_ITEM_TEMPLATE(X509_ALGORS) =
          ASN1_EX_TEMPLATE_TYPE(ASN1_TFLG_SEQUENCE_OF, 0, algorithms, X509_ALGOR)
  ASN1_ITEM_TEMPLATE_END(X509_ALGORS)
  
  IMPLEMENT_ASN1_FUNCTIONS(X509_ALGOR)
  IMPLEMENT_ASN1_ENCODE_FUNCTIONS_fname(X509_ALGORS, X509_ALGORS, X509_ALGORS)
  IMPLEMENT_ASN1_DUP_FUNCTION(X509_ALGOR)
  
  IMPLEMENT_ASN1_SET_OF(X509_ALGOR)
  
  int X509_ALGOR_set0(X509_ALGOR *alg, const ASN1_OBJECT *aobj, int ptype,
                      void *pval)
  {
      if (!alg)
          return 0;
      if (ptype != V_ASN1_UNDEF) {
          if (alg->parameter == NULL)
              alg->parameter = ASN1_TYPE_new();
          if (alg->parameter == NULL)
              return 0;
      }
      if (alg) {
          if (alg->algorithm)
              ASN1_OBJECT_free(alg->algorithm);
          alg->algorithm = (ASN1_OBJECT *)aobj;
      }
      if (ptype == 0)
          return 1;
      if (ptype == V_ASN1_UNDEF) {
          if (alg->parameter) {
              ASN1_TYPE_free(alg->parameter);
              alg->parameter = NULL;
          }
      } else
          ASN1_TYPE_set(alg->parameter, ptype, pval);
      return 1;
  }
  
  void X509_ALGOR_get0(const ASN1_OBJECT **paobj, int *pptype, const void **ppval,
                       const X509_ALGOR *algor)
  {
      if (paobj)
          *paobj = algor->algorithm;
      if (pptype) {
          if (algor->parameter == NULL) {
              *pptype = V_ASN1_UNDEF;
              return;
          } else
              *pptype = algor->parameter->type;
          if (ppval)
              *ppval = algor->parameter->value.ptr;
      }
  }
  
  /* Set up an X509_ALGOR DigestAlgorithmIdentifier from an EVP_MD */
  
  void X509_ALGOR_set_md(X509_ALGOR *alg, const EVP_MD *md)
  {
      int param_type;
  
      if (EVP_MD_flags(md) & EVP_MD_FLAG_DIGALGID_ABSENT)
          param_type = V_ASN1_UNDEF;
      else
          param_type = V_ASN1_NULL;
  
      X509_ALGOR_set0(alg, OBJ_nid2obj(EVP_MD_type(md)), param_type, NULL);
  
  }
  
  /*
   * X509_ALGOR_cmp returns 0 if |a| and |b| are equal and non-zero otherwise.
   */
  int X509_ALGOR_cmp(const X509_ALGOR *a, const X509_ALGOR *b)
  {
      int rv;
      rv = OBJ_cmp(a->algorithm, b->algorithm);
      if (rv)
          return rv;
      if (!a->parameter && !b->parameter)
          return 0;
      return ASN1_TYPE_cmp(a->parameter, b->parameter);
  }
  