text: /*
   * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   *
   * Licensed under the OpenSSL license (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.openssl.org/source/license.html
   */
  
  #include <stdio.h>
  #include BOSS_OPENSSL_U_internal__cryptlib_h //original-code:"internal/cryptlib.h"
  #include BOSS_OPENSSL_V_openssl__asn1t_h //original-code:<openssl/asn1t.h>
  #include BOSS_OPENSSL_V_openssl__x509_h //original-code:<openssl/x509.h>
  #include BOSS_OPENSSL_U_internal__x509_int_h //original-code:"internal/x509_int.h"
  
  /*-
   * X509_REQ_INFO is handled in an unusual way to get round
   * invalid encodings. Some broken certificate requests don't
   * encode the attributes field if it is empty. This is in
   * violation of PKCS#10 but we need to tolerate it. We do
   * this by making the attributes field OPTIONAL then using
   * the callback to initialise it to an empty STACK.
   *
   * This means that the field will be correctly encoded unless
   * we NULL out the field.
   *
   * As a result we no longer need the req_kludge field because
   * the information is now contained in the attributes field:
   * 1. If it is NULL then it's the invalid omission.
   * 2. If it is empty it is the correct encoding.
   * 3. If it is not empty then some attributes are present.
   *
   */
  
  static int rinf_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
                     void *exarg)
  {
      X509_REQ_INFO *rinf = (X509_REQ_INFO *)*pval;
  
      if (operation == ASN1_OP_NEW_POST) {
          rinf->attributes = sk_X509_ATTRIBUTE_new_null();
          if (!rinf->attributes)
              return 0;
      }
      return 1;
  }
  
  ASN1_SEQUENCE_enc(X509_REQ_INFO, enc, rinf_cb) = {
          ASN1_SIMPLE(X509_REQ_INFO, version, ASN1_INTEGER),
          ASN1_SIMPLE(X509_REQ_INFO, subject, X509_NAME),
          ASN1_SIMPLE(X509_REQ_INFO, pubkey, X509_PUBKEY),
          /* This isn't really OPTIONAL but it gets round invalid
           * encodings
           */
          ASN1_IMP_SET_OF_OPT(X509_REQ_INFO, attributes, X509_ATTRIBUTE, 0)
  } ASN1_SEQUENCE_END_enc(X509_REQ_INFO, X509_REQ_INFO)
  
  IMPLEMENT_ASN1_FUNCTIONS(X509_REQ_INFO)
  
  ASN1_SEQUENCE_ref(X509_REQ, 0) = {
          ASN1_EMBED(X509_REQ, req_info, X509_REQ_INFO),
          ASN1_EMBED(X509_REQ, sig_alg, X509_ALGOR),
          ASN1_SIMPLE(X509_REQ, signature, ASN1_BIT_STRING)
  } ASN1_SEQUENCE_END_ref(X509_REQ, X509_REQ)
  
  IMPLEMENT_ASN1_FUNCTIONS(X509_REQ)
  
  IMPLEMENT_ASN1_DUP_FUNCTION(X509_REQ)
  