/*
 *      Copyright (C) 2004, 2005, 2006 Free Software Foundation
 *      Copyright (C) 2002 Fabio Fiorina
 *
 * This file is part of LIBTASN1.
 *
 * LIBTASN1 is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * LIBTASN1 is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with LIBTASN1; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 * 02110-1301, USA
 *
 */

#ifndef LIBTASN1_H
# define LIBTASN1_H

#include <stdio.h>		/* for FILE* */

#ifdef __cplusplus
extern "C"
{
#endif

#define LIBTASN1_VERSION "1.2"

#include <sys/types.h>
#include <time.h>

#define MAX_NAME_SIZE 128	/* maximum number of characters of a name */
  /* inside a file with ASN1 definitons     */
#define MAX_ERROR_DESCRIPTION_SIZE 128	/* maximum number of characters */
  /* of a description message     */
  /* (null character included)    */


  typedef int asn1_retCode;	/* type returned by libtasn1 functions */

  /*****************************************/
  /*  Errors returned by libtasn1 functions */
  /*****************************************/
#define ASN1_SUCCESS               0
#define ASN1_FILE_NOT_FOUND        1
#define ASN1_ELEMENT_NOT_FOUND     2
#define ASN1_IDENTIFIER_NOT_FOUND  3
#define ASN1_DER_ERROR             4
#define ASN1_VALUE_NOT_FOUND       5
#define ASN1_GENERIC_ERROR         6
#define ASN1_VALUE_NOT_VALID       7
#define ASN1_TAG_ERROR             8
#define ASN1_TAG_IMPLICIT          9
#define ASN1_ERROR_TYPE_ANY        10
#define ASN1_SYNTAX_ERROR          11
#define ASN1_MEM_ERROR		   12
#define ASN1_MEM_ALLOC_ERROR	   13
#define ASN1_DER_OVERFLOW          14
#define ASN1_NAME_TOO_LONG         15
#define ASN1_ARRAY_ERROR           16
#define ASN1_ELEMENT_NOT_EMPTY     17

/*************************************/
/* Constants used in asn1_visit_tree */
/*************************************/
#define ASN1_PRINT_NAME             1
#define ASN1_PRINT_NAME_TYPE        2
#define ASN1_PRINT_NAME_TYPE_VALUE  3
#define ASN1_PRINT_ALL              4

/*****************************************/
/* Constants returned by asn1_read_tag   */
/*****************************************/
#define ASN1_CLASS_UNIVERSAL        0x00	/* old: 1 */
#define ASN1_CLASS_APPLICATION      0x40	/* old: 2 */
#define ASN1_CLASS_CONTEXT_SPECIFIC 0x80	/* old: 3 */
#define ASN1_CLASS_PRIVATE          0xC0	/* old: 4 */
#define ASN1_CLASS_STRUCTURED       0x20

/*****************************************/
/* Constants returned by asn1_read_tag   */
/*****************************************/
#define ASN1_TAG_BOOLEAN          0x01
#define ASN1_TAG_INTEGER          0x02
#define ASN1_TAG_SEQUENCE         0x10
#define ASN1_TAG_SET              0x11
#define ASN1_TAG_OCTET_STRING     0x04
#define ASN1_TAG_BIT_STRING       0x03
#define ASN1_TAG_UTCTime          0x17
#define ASN1_TAG_GENERALIZEDTime  0x18
#define ASN1_TAG_OBJECT_ID        0x06
#define ASN1_TAG_ENUMERATED       0x0A
#define ASN1_TAG_NULL             0x05
#define ASN1_TAG_GENERALSTRING    0x1B

/******************************************************/
/* Structure definition used for the node of the tree */
/* that represent an ASN.1 DEFINITION.                */
/******************************************************/

  struct node_asn_struct
  {
    char *name;			/* Node name */
    unsigned int type;		/* Node type */
    unsigned char *value;	/* Node value */
    int value_len;
    struct node_asn_struct *down;	/* Pointer to the son node */
    struct node_asn_struct *right;	/* Pointer to the brother node */
    struct node_asn_struct *left;	/* Pointer to the next list element */
  };

  typedef struct node_asn_struct node_asn;

  typedef node_asn *ASN1_TYPE;

#define ASN1_TYPE_EMPTY  NULL

  struct static_struct_asn
  {
    const char *name;			/* Node name */
    unsigned int type;		/* Node type */
    const void *value;	/* Node value */
  };

  typedef struct static_struct_asn ASN1_ARRAY_TYPE;



  /***********************************/
  /*  Functions definitions          */
  /***********************************/

  asn1_retCode asn1_parser2tree (const char *file_name,
				 ASN1_TYPE * definitions,
				 char *errorDescription);

  asn1_retCode asn1_parser2array (const char *inputFileName,
				  const char *outputFileName,
				  const char *vectorName,
				  char *errorDescription);

  asn1_retCode asn1_array2tree (const ASN1_ARRAY_TYPE * array,
				ASN1_TYPE * definitions,
				char *errorDescription);

  void asn1_print_structure (FILE *out, ASN1_TYPE structure, const char *name,
			     int mode);

  asn1_retCode asn1_create_element (ASN1_TYPE definitions,
				    const char *source_name,
				    ASN1_TYPE * element);

  asn1_retCode asn1_delete_structure (ASN1_TYPE * structure);

  asn1_retCode asn1_delete_element (ASN1_TYPE structure,
				    const char *element_name);

  asn1_retCode asn1_write_value (ASN1_TYPE node_root, const char *name,
				 const void *ivalue, int len);

  asn1_retCode asn1_read_value (ASN1_TYPE root, const char *name,
				void *ivalue, int *len);

  asn1_retCode asn1_number_of_elements (ASN1_TYPE element, const char *name,
					int *num);

  asn1_retCode asn1_der_coding (ASN1_TYPE element, const char *name,
				void *ider, int *len, char *ErrorDescription);

  asn1_retCode asn1_der_decoding (ASN1_TYPE * element, const void *ider,
				  int len, char *errorDescription);

  asn1_retCode asn1_der_decoding_element (ASN1_TYPE * structure,
					  const char *elementName,
					  const void *ider, int len,
					  char *errorDescription);

  asn1_retCode asn1_der_decoding_startEnd (ASN1_TYPE element,
					   const void *ider, int len,
					   const char *name_element,
					   int *start, int *end);

  asn1_retCode asn1_expand_any_defined_by (ASN1_TYPE definitions,
					   ASN1_TYPE * element);

  asn1_retCode asn1_expand_octet_string (ASN1_TYPE definitions,
					 ASN1_TYPE * element,
					 const char *octetName,
					 const char *objectName);

  asn1_retCode asn1_read_tag (node_asn * root, const char *name,
			      int *tagValue, int *classValue);

  const char *asn1_find_structure_from_oid (ASN1_TYPE definitions,
					    const char *oidValue);

  const char *asn1_check_version (const char *req_version);

  const char *libtasn1_strerror (asn1_retCode error);

  void libtasn1_perror (asn1_retCode error);

  /* DER utility functions. */

  int asn1_get_tag_der (const unsigned char *der, int der_len,
			unsigned char *cls, int *len, unsigned long *tag);

  void asn1_octet_der (const unsigned char *str, int str_len,
		       unsigned char *der, int *der_len);

  asn1_retCode asn1_get_octet_der (const unsigned char *der, int der_len,
				   int *ret_len, unsigned char *str,
				   int str_size, int *str_len);

  void asn1_bit_der (const unsigned char *str, int bit_len,
		     unsigned char *der, int *der_len);

  asn1_retCode asn1_get_bit_der (const unsigned char *der, int der_len,
				 int *ret_len, unsigned char *str,
				 int str_size, int *bit_len);

  signed long asn1_get_length_der (const unsigned char *der, int der_len,
				   int *len);

  void asn1_length_der (unsigned long int len, unsigned char *ans,
			int *ans_len);

  /* Other utility functions. */

  ASN1_TYPE asn1_find_node (ASN1_TYPE pointer, const char *name);

  asn1_retCode asn1_copy_node (ASN1_TYPE dst, const char *dst_name,
			       ASN1_TYPE src, const char *src_name);

#ifdef __cplusplus
}
#endif

#endif				/* LIBTASN1_H */
