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/**
* @file asn1.h
*
* @brief Definition of asn1_rule_t and other ASN1 stuff.
*
*/
/*
* Copyright (C) 2006 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program 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 General Public License
* for more details.
*/
#ifndef ASN1_H_
#define ASN1_H_
#include <types.h>
typedef enum asn1_type_t asn1_type_t;
/**
* @brief Real and some special ASN1 types.
*
* @ingroup asn1
*/
enum asn1_type_t {
/**
* End of a sequence, set, choice
*/
ASN1_END = 0x00,
ASN1_BOOLEAN = 0x01,
ASN1_INTEGER = 0x02,
ASN1_BITSTRING = 0x03,
ASN1_OCTETSTRING = 0x04,
ASN1_NULL = 0x05,
ASN1_OID = 0x06,
ASN1_ENUMERATED = 0x0A,
ASN1_UTF8STRING = 0x0C,
ASN1_NUMERICSTRING = 0x12,
ASN1_PRINTABLESTRING = 0x13,
ASN1_T61STRING = 0x14,
ASN1_VIDEOTEXSTRING = 0x15,
ASN1_IA5STRING = 0x16,
ASN1_UTCTIME = 0x17,
ASN1_GENERALIZEDTIME = 0x18,
ASN1_GRAPHICSTRING = 0x19,
ASN1_VISIBLESTRING = 0x1A,
ASN1_GENERALSTRING = 0x1B,
ASN1_UNIVERSALSTRING = 0x1C,
ASN1_BMPSTRING = 0x1E,
ASN1_CONSTRUCTED = 0x20,
ASN1_SEQUENCE = 0x30,
ASN1_SET = 0x31,
/**
* EXCPLICIT tags
*/
ASN1_TAG_E_0 = 0xA0,
ASN1_TAG_E_1 = 0xA1,
ASN1_TAG_E_2 = 0xA2,
ASN1_TAG_E_3 = 0xA3,
ASN1_TAG_E_4 = 0xA4,
ASN1_TAG_E_5 = 0xA5,
ASN1_TAG_E_6 = 0xA6,
ASN1_TAG_E_7 = 0xA7,
/**
* IMPLICIT tags
*/
ASN1_TAG_I_0 = 0x80,
ASN1_TAG_I_1 = 0x81,
ASN1_TAG_I_2 = 0x82,
ASN1_TAG_I_3 = 0x83,
ASN1_TAG_I_4 = 0x84,
ASN1_TAG_I_5 = 0x85,
ASN1_TAG_I_6 = 0x86,
ASN1_TAG_I_7 = 0x87,
/**
* Begin of a choice
*/
ASN1_CHOICE = 0xFE,
/**
* ANY type
*/
ASN1_ANY = 0xFF,
};
/**
* String mappings for asn1_type_t
*/
extern mapping_t asn1_type_m[];
typedef enum asn1_flag_t asn1_flag_t;
/**
* @brief Flags used to build ASN1 rules.
*
* @ingroup asn1
*/
enum asn1_flag_t {
/**
* Field is optional
*/
ASN1_OPTIONAL = 0x01,
/**
* Field has a default value and is therefore optional
*/
ASN1_DEFAULT = 0x02,
/**
* Convert this INTEGER to an mpz_t
*/
ASN1_MPZ = 0x04,
/**
* SEQUENCE or SET OF
*/
ASN1_OF = 0x08,
/**
* Parse this Sequence in a RAW chunk too.
* Used for crypto calculations...
*/
ASN1_RAW = 0x10,
};
/**
* String mappings for asn1_flag_t
*/
extern mapping_t asn1_flag_m[];
typedef struct asn1_rule_t asn1_rule_t;
/**
* @brief Single rule of a complet ruleset.
*
* This rule containing a type, flags and additional
* data allow modellation of complex ASN1 structures and
* allow their en- and decoding...
*
* @ingroup asn1
*/
struct asn1_rule_t {
/**
* ASN1 type
*/
asn1_type_t type;
/**
* implicit or explicit tag, if any
*/
asn1_flag_t flags;
/**
* offset of data in structure
*/
u_int data_offset;
/**
* offset to a boolean, which says if optional
* data is available at data_offset. Used if
* flags & ASN1_OPTIONAL.
* default value, used if flags & ASN1_DEFAULT
*/
u_int additional;
};
#endif /* ASN1_H_ */
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