text:  
  /* crypto/asn1/x_x509.c */
  /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   * All rights reserved.
   *
   * This package is an SSL implementation written
   * by Eric Young (eay@cryptsoft.com).
   * The implementation was written so as to conform with Netscapes SSL.
   * 
   * This library is free for commercial and non-commercial use as long as
   * the following conditions are aheared to.  The following conditions
   * apply to all code found in this distribution, be it the RC4, RSA,
   * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
   * included with this distribution is covered by the same copyright terms
   * except that the holder is Tim Hudson (tjh@cryptsoft.com).
   * 
   * Copyright remains Eric Young's, and as such any Copyright notices in
   * the code are not to be removed.
   * If this package is used in a product, Eric Young should be given attribution
   * as the author of the parts of the library used.
   * This can be in the form of a textual message at program startup or
   * in documentation (online or textual) provided with the package.
   * 
   * 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 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 acknowledgement:
   *    "This product includes cryptographic software written by
   *     Eric Young (eay@cryptsoft.com)"
   *    The word 'cryptographic' can be left out if the rouines from the library
   *    being used are not cryptographic related :-).
   * 4. If you include any Windows specific code (or a derivative thereof) from 
   *    the apps directory (application code) you must include an acknowledgement:
   *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
   * 
   * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
   * ANY EXPRESS 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 AUTHOR OR 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.
   * 
   * The licence and distribution terms for any publically available version or
   * derivative of this code cannot be changed.  i.e. this code cannot simply be
   * copied and put under another distribution licence
   * [including the GNU Public Licence.]
   */
  
  #include <stdio.h>
  #include "cryptlib.h"
  #include <openssl/evp.h>
  #include <openssl/asn1t.h>
  #include <openssl/x509.h>
  #include <openssl/x509v3.h>
  
  ASN1_SEQUENCE_enc(X509_CINF, enc, 0) = {
  	ASN1_EXP_OPT(X509_CINF, version, ASN1_INTEGER, 0),
  	ASN1_SIMPLE(X509_CINF, serialNumber, ASN1_INTEGER),
  	ASN1_SIMPLE(X509_CINF, signature, X509_ALGOR),
  	ASN1_SIMPLE(X509_CINF, issuer, X509_NAME),
  	ASN1_SIMPLE(X509_CINF, validity, X509_VAL),
  	ASN1_SIMPLE(X509_CINF, subject, X509_NAME),
  	ASN1_SIMPLE(X509_CINF, key, X509_PUBKEY),
  	ASN1_IMP_OPT(X509_CINF, issuerUID, ASN1_BIT_STRING, 1),
  	ASN1_IMP_OPT(X509_CINF, subjectUID, ASN1_BIT_STRING, 2),
  	ASN1_EXP_SEQUENCE_OF_OPT(X509_CINF, extensions, X509_EXTENSION, 3)
  } ASN1_SEQUENCE_END_enc(X509_CINF, X509_CINF)
  
  IMPLEMENT_ASN1_FUNCTIONS(X509_CINF)
  /* X509 top level structure needs a bit of customisation */
  
  extern void policy_cache_free(X509_POLICY_CACHE *cache);
  
  static int x509_cb(int operation, ASN1_VALUE **pval, const ASN1_ITEM *it,
  								void *exarg)
  {
  	X509 *ret = (X509 *)*pval;
  
  	switch(operation) {
  
  		case ASN1_OP_NEW_POST:
  		ret->valid=0;
  		ret->name = NULL;
  		ret->ex_flags = 0;
  		ret->ex_pathlen = -1;
  		ret->skid = NULL;
  		ret->akid = NULL;
  #ifndef OPENSSL_NO_RFC3779
  		ret->rfc3779_addr = NULL;
  		ret->rfc3779_asid = NULL;
  #endif
  		ret->aux = NULL;
  		ret->crldp = NULL;
  		CRYPTO_new_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
  		break;
  
  		case ASN1_OP_D2I_POST:
  		if (ret->name != NULL) OPENSSL_free(ret->name);
  		ret->name=X509_NAME_oneline(ret->cert_info->subject,NULL,0);
  		break;
  
  		case ASN1_OP_FREE_POST:
  		CRYPTO_free_ex_data(CRYPTO_EX_INDEX_X509, ret, &ret->ex_data);
  		X509_CERT_AUX_free(ret->aux);
  		ASN1_OCTET_STRING_free(ret->skid);
  		AUTHORITY_KEYID_free(ret->akid);
  		CRL_DIST_POINTS_free(ret->crldp);
  		policy_cache_free(ret->policy_cache);
  		GENERAL_NAMES_free(ret->altname);
  		NAME_CONSTRAINTS_free(ret->nc);
  #ifndef OPENSSL_NO_RFC3779
  		sk_IPAddressFamily_pop_free(ret->rfc3779_addr, IPAddressFamily_free);
  		ASIdentifiers_free(ret->rfc3779_asid);
  #endif
  
  		if (ret->name != NULL) OPENSSL_free(ret->name);
  		break;
  
  	}
  
  	return 1;
  
  }
  
  ASN1_SEQUENCE_ref(X509, x509_cb, CRYPTO_LOCK_X509) = {
  	ASN1_SIMPLE(X509, cert_info, X509_CINF),
  	ASN1_SIMPLE(X509, sig_alg, X509_ALGOR),
  	ASN1_SIMPLE(X509, signature, ASN1_BIT_STRING)
  } ASN1_SEQUENCE_END_ref(X509, X509)
  
  IMPLEMENT_ASN1_FUNCTIONS(X509)
  IMPLEMENT_ASN1_DUP_FUNCTION(X509)
  
  int X509_get_ex_new_index(long argl, void *argp, CRYPTO_EX_new *new_func,
  	     CRYPTO_EX_dup *dup_func, CRYPTO_EX_free *free_func)
          {
  	return CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_X509, argl, argp,
  				new_func, dup_func, free_func);
          }
  
  int X509_set_ex_data(X509 *r, int idx, void *arg)
  	{
  	return(CRYPTO_set_ex_data(&r->ex_data,idx,arg));
  	}
  
  void *X509_get_ex_data(X509 *r, int idx)
  	{
  	return(CRYPTO_get_ex_data(&r->ex_data,idx));
  	}
  
  /* X509_AUX ASN1 routines. X509_AUX is the name given to
   * a certificate with extra info tagged on the end. Since these
   * functions set how a certificate is trusted they should only
   * be used when the certificate comes from a reliable source
   * such as local storage.
   *
   */
  
  X509 *d2i_X509_AUX(X509 **a, const unsigned char **pp, long length)
  {
  	const unsigned char *q;
  	X509 *ret;
  	/* Save start position */
  	q = *pp;
  	ret = d2i_X509(a, pp, length);
  	/* If certificate unreadable then forget it */
  	if(!ret) return NULL;
  	/* update length */
  	length -= *pp - q;
  	if(!length) return ret;
  	if(!d2i_X509_CERT_AUX(&ret->aux, pp, length)) goto err;
  	return ret;
  	err:
  	X509_free(ret);
  	return NULL;
  }
  
  int i2d_X509_AUX(X509 *a, unsigned char **pp)
  {
  	int length;
  	length = i2d_X509(a, pp);
  	if(a) length += i2d_X509_CERT_AUX(a->aux, pp);
  	return length;
  }
  