1. 根目录:
2. include
3. linux
4. asn1.h

/* ASN.1 BER/DER/CER encoding definitions
 *
 * Copyright (C) 2012 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public Licence
 * as published by the Free Software Foundation; either version
 * 2 of the Licence, or (at your option) any later version.
 */

#ifndef _LINUX_ASN1_H
#define _LINUX_ASN1_H

/* 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

#endif /* _LINUX_ASN1_H */