text: /* crypto/asn1/evp_asn1.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 "internal/cryptlib.h"
  #include <openssl/asn1.h>
  #include <openssl/asn1t.h>
  
  int ASN1_TYPE_set_octetstring(ASN1_TYPE *a, unsigned char *data, int len)
  {
      ASN1_STRING *os;
  
      if ((os = ASN1_OCTET_STRING_new()) == NULL)
          return (0);
      if (!ASN1_OCTET_STRING_set(os, data, len)) {
          ASN1_OCTET_STRING_free(os);
          return 0;
      }
      ASN1_TYPE_set(a, V_ASN1_OCTET_STRING, os);
      return (1);
  }
  
  /* int max_len:  for returned value    */
  int ASN1_TYPE_get_octetstring(ASN1_TYPE *a, unsigned char *data, int max_len)
  {
      int ret, num;
      unsigned char *p;
  
      if ((a->type != V_ASN1_OCTET_STRING) || (a->value.octet_string == NULL)) {
          ASN1err(ASN1_F_ASN1_TYPE_GET_OCTETSTRING, ASN1_R_DATA_IS_WRONG);
          return (-1);
      }
      p = ASN1_STRING_data(a->value.octet_string);
      ret = ASN1_STRING_length(a->value.octet_string);
      if (ret < max_len)
          num = ret;
      else
          num = max_len;
      memcpy(data, p, num);
      return (ret);
  }
  
  typedef struct {
      long num;
      ASN1_OCTET_STRING *oct;
  } asn1_int_oct;
  
  ASN1_SEQUENCE(asn1_int_oct) = {
          ASN1_SIMPLE(asn1_int_oct, num, LONG),
          ASN1_SIMPLE(asn1_int_oct, oct, ASN1_OCTET_STRING)
  } static_ASN1_SEQUENCE_END(asn1_int_oct)
  
  DECLARE_ASN1_ITEM(asn1_int_oct)
  
  int ASN1_TYPE_set_int_octetstring(ASN1_TYPE *a, long num, unsigned char *data,
                                    int len)
  {
      asn1_int_oct atmp;
      ASN1_OCTET_STRING oct;
  
      atmp.num = num;
      atmp.oct = &oct;
      oct.data = data;
      oct.type = V_ASN1_OCTET_STRING;
      oct.length = len;
      oct.flags = 0;
  
      if (ASN1_TYPE_pack_sequence(ASN1_ITEM_rptr(asn1_int_oct), &atmp, &a))
          return 1;
      return 0;
  }
  
  /*
   * we return the actual length...
   */
  /* int max_len:  for returned value    */
  int ASN1_TYPE_get_int_octetstring(ASN1_TYPE *a, long *num,
                                    unsigned char *data, int max_len)
  {
      asn1_int_oct *atmp = NULL;
      int ret = -1, n;
  
      if ((a->type != V_ASN1_SEQUENCE) || (a->value.sequence == NULL)) {
          goto err;
      }
  
      atmp = ASN1_TYPE_unpack_sequence(ASN1_ITEM_rptr(asn1_int_oct), a);
  
      if (atmp == NULL)
          goto err;
  
      if (num != NULL)
          *num = atmp->num;
  
      ret = ASN1_STRING_length(atmp->oct);
      if (max_len > ret)
          n = ret;
      else
          n = max_len;
  
      if (data != NULL)
          memcpy(data, ASN1_STRING_data(atmp->oct), n);
      if (ret == -1) {
   err:
          ASN1err(ASN1_F_ASN1_TYPE_GET_INT_OCTETSTRING, ASN1_R_DATA_IS_WRONG);
      }
      M_ASN1_free_of(atmp, asn1_int_oct);
      return ret;
  }
  