/*
 * Copyright (C) 2024 - 2026, Stephan Mueller <smueller@chronox.de>
 *
 * License: see LICENSE file in root directory
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, ALL OF
 * WHICH ARE HEREBY DISCLAIMED.  NO EVENT SHALL THE AUTHOR 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 CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING ANY WAY OF THE
 * USE OF THIS SOFTWARE, EVEN IF NOT ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 */
/*
 * This code is derived in parts from the Linux kernel
 * License: SPDX-License-Identifier: GPL-2.0-or-later
 *
 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 */
/*
 * Red Hat granted the following additional license to the leancrypto project:
 * SPDX-License-Identifier: BSD-3-Clause
 */

#ifndef ASN1_H
#define ASN1_H

#ifdef __cplusplus
extern "C" {
#endif

/* Class */
enum asn1_class {
	ASN1_UNIV = 0, /* Universal */
	ASN1_APPL = 1, /* Application */
	ASN1_CONT = 2, /* Context */
	ASN1_PRIV = 3 /* Private */
};
#define ASN1_CLASS_BITS 0xc0

enum asn1_method {
	ASN1_PRIM = 0, /* Primitive */
	ASN1_CONS = 1 /* Constructed */
};
#define ASN1_CONS_BIT 0x20

/* Tag */
enum asn1_tag {
	ASN1_EOC = 0, /* End Of Contents or N/A */
	ASN1_BOOL = 1, /* Boolean */
	ASN1_INT = 2, /* Integer */
	ASN1_BTS = 3, /* Bit String */
	ASN1_OTS = 4, /* Octet String */
	ASN1_NULL = 5, /* Null */
	ASN1_OID = 6, /* Object Identifier  */
	ASN1_ODE = 7, /* Object Description */
	ASN1_EXT = 8, /* External */
	ASN1_REAL = 9, /* Real float */
	ASN1_ENUM = 10, /* Enumerated */
	ASN1_EPDV = 11, /* Embedded PDV */
	ASN1_UTF8STR = 12, /* UTF8 String */
	ASN1_RELOID = 13, /* Relative OID */
	/* 14 - Reserved */
	/* 15 - Reserved */
	ASN1_SEQ = 16, /* Sequence and Sequence of */
	ASN1_SET = 17, /* Set and Set of */
	ASN1_NUMSTR = 18, /* Numerical String */
	ASN1_PRNSTR = 19, /* Printable String */
	ASN1_TEXSTR = 20, /* T61 String / Teletext String */
	ASN1_VIDSTR = 21, /* Videotex String */
	ASN1_IA5STR = 22, /* IA5 String */
	ASN1_UNITIM = 23, /* Universal Time */
	ASN1_GENTIM = 24, /* General Time */
	ASN1_GRASTR = 25, /* Graphic String */
	ASN1_VISSTR = 26, /* Visible String */
	ASN1_GENSTR = 27, /* General String */
	ASN1_UNISTR = 28, /* Universal String */
	ASN1_CHRSTR = 29, /* Character String */
	ASN1_BMPSTR = 30, /* BMP String */
	ASN1_LONG_TAG = 31 /* Long form tag */
};

#define ASN1_INDEFINITE_LENGTH 0x80

#define ASN1_TRUE 0xff
#define ASN1_FALSE 0x00

#define ASN1_MAX_DATASIZE (1 << 18)

#ifdef __cplusplus
}
#endif

#endif /* ASN1_H */
