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/* -*- mode:c; tab-width:8; c-basic-offset:8; indent-tabs-mode:nil; -*- */
#ifndef _ASN1_BER_H_
#define _ASN1_BER_H_
/*
Copyright (C) 2018 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
and 2024 by Brian Dodge <bdodge09@gmail.com>
Copyright (C) 2024 by André Guilherme <andregui17@outlook.com>
This program 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.
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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, see <http:/www.gnu.org/licenses/>.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#ifdef HAVE_STDINT_H
#include <stdint.h>
#endif
#ifdef __cplusplus
extern "C" {
#endif
#define BER_MAX_OID_ELEMENTS (32)
typedef uint32_t beroid_type_t;
/* Notes: BER = ASN.1 Basic Encoding Rules defined in ITU-TX.690
* https://www.itu.int/ITU-T/studygroups/com17/languages/X.690-0207.pdf
*/
/** ASN.1 Type Tags in BER per X.208
*/
#define asnUNIVERSAL (0x0)
#define asnBOOLEAN (0x1)
#define asnINTEGER (0x2)
#define asnBIT_STRING (0x3)
#define asnOCTET_STRING (0x4)
#define asnNULL (0x5)
#define asnOBJECT_ID (0x6)
#define asnENUMERATED (0xA)
#define asnSEQUENCE (0x10)
#define asnSET (0x11)
#define asnPRINTABLE_STR (0x13)
#define asnUTC_TIME (0x17)
/** ASN.1 Type Class in BER per X.690
*/
#define asnEXTENSION_ID (0x1F)
#define asnCONSTRUCTOR (0x20)
#define asnSTRUCT (0x30)
#define asnAPPLICATION (0x40)
#define asnCONTEXT_SPECIFIC (0x80)
#define asnPRIVATE (0xC0)
typedef enum
{
/** SNMP Basic Types per ASN.1 BER
*/
BER_BOOLEAN = (asnBOOLEAN),
BER_INTEGER = (asnINTEGER),
BER_BIT_STRING = (asnBIT_STRING),
BER_OCTET_STRING = (asnOCTET_STRING),
BER_NULL = (asnNULL),
BER_OBJECT_ID = (asnOBJECT_ID),
BER_ENUMERATED = (asnENUMERATED),
BER_SEQUENCE = (asnSEQUENCE),
BER_SETOF = (asnSET),
BER_PRINTABLE_STR = (asnPRINTABLE_STR),
BER_UTC_TIME = (asnUTC_TIME),
/** BER Types as per RFC-1442, pre-formatted per BER
*/
BER_IPADDRESS = (asnAPPLICATION | 0x0),
BER_COUNTER = (asnAPPLICATION | 0x1),
BER_GAUGE = (asnAPPLICATION | 0x2),
BER_UNSIGNED = (asnAPPLICATION | 0x2),
BER_TIMETICKS = (asnAPPLICATION | 0x3),
BER_OPAQUE = (asnAPPLICATION | 0x4),
BER_NSAPADDRESS = (asnAPPLICATION | 0x5),
BER_COUNTER64 = (asnAPPLICATION | 0x6),
BER_UNSIGNED32 = (asnAPPLICATION | 0x7),
BER_FLOAT = (asnAPPLICATION | 0x8),
BER_DOUBLE = (asnAPPLICATION | 0x9),
/** BER Types per RFC3781 = (Next gen SMI)
*/
BER_INTEGER64 = (asnAPPLICATION | 0xA),
BER_UNSIGNED64 = (asnAPPLICATION | 0xB),
BER_FLOAT32 = (asnAPPLICATION | 0xC),
BER_FLOAT64 = (asnAPPLICATION | 0xD),
BER_FLOAT128 = (asnAPPLICATION | 0xE)
}
ber_type_t;
#define ASN1_SEQUENCE(n) (asnSTRUCT | (n))
#define ASN1_CONTEXT(n) (asnCONTEXT_SPECIFIC | asnCONSTRUCTOR | (n))
#define ASN1_CONTEXT_SIMPLE(n) (asnCONTEXT_SPECIFIC | (n))
#define ASN1_PRIVATE (asnPRIVATE)
struct asn1ber_context
{
uint8_t *src;
int src_count;
int src_tail;
uint8_t *dst;
int dst_size;
int dst_head;
int last_error;
};
struct asn1ber_oid_value {
int length;
beroid_type_t elements[BER_MAX_OID_ELEMENTS];
};
int asn1ber_save_out_state(struct asn1ber_context *actx, int *out_pos);
int asn1ber_annotate_length(struct asn1ber_context *actx, int out_pos, int reserved);
int asn1ber_length_from_ber(struct asn1ber_context *actx, uint32_t *len);
int ber_typecode_from_ber(struct asn1ber_context *actx, ber_type_t *typecode);
int ber_typelen_from_ber(struct asn1ber_context *actx, ber_type_t *typecode, uint32_t *len);
int asn1ber_request_from_ber(struct asn1ber_context *actx, ber_type_t *opcode, uint32_t *len);
int asn1ber_struct_from_ber(struct asn1ber_context *actx, uint32_t *len);
int asn1ber_null_from_ber(struct asn1ber_context *actx, uint32_t *len);
int asn1ber_int32_from_ber(struct asn1ber_context *actx, int32_t *val);
int asn1ber_uint32_from_ber(struct asn1ber_context *actx, uint32_t *val);
int asn1ber_int64_from_ber(struct asn1ber_context *actx, int64_t *val);
int asn1ber_uint64_from_ber(struct asn1ber_context *actx, uint64_t *val);
int asn1ber_oid_from_ber(struct asn1ber_context *actx, struct asn1ber_oid_value *oid);
int asn1ber_bytes_from_ber(struct asn1ber_context *actx, uint8_t *val, uint32_t maxlen, uint32_t *lenout);
int asn1ber_string_from_ber(struct asn1ber_context *actx, char *val, uint32_t maxlen, uint32_t *lenout);
int asn1ber_ber_from_length(struct asn1ber_context *actx, uint32_t lenin, uint32_t *lenout);
int asn1ber_ber_reserve_length(struct asn1ber_context *actx, uint32_t len);
int asn1ber_ber_from_typecode(struct asn1ber_context *actx, const ber_type_t typecode);
int asn1ber_ber_from_typelen(struct asn1ber_context *actx, const ber_type_t typecode, const uint32_t lenin, uint32_t *lenout);
int asn1ber_ber_from_int32(struct asn1ber_context *actx, const ber_type_t type, const int32_t val);
int asn1ber_ber_from_uint32(struct asn1ber_context *actx, const ber_type_t type, const uint32_t val);
int asn1ber_ber_from_int64(struct asn1ber_context *actx, const ber_type_t type, const int64_t val);
int asn1ber_ber_from_uint64(struct asn1ber_context *actx, const ber_type_t type, const uint64_t val);
int asn1ber_ber_from_oid(struct asn1ber_context *actx, const struct asn1ber_oid_value *oid);
int asn1ber_ber_from_bytes(struct asn1ber_context *actx, const ber_type_t type, const uint8_t *val, uint32_t len);
int asn1ber_ber_from_string(struct asn1ber_context *actx, const char *val, uint32_t len);
#ifdef __cplusplus
}
#endif
#endif /* ASN1_BER_H_ */
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