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wireshark/asn1.h

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/* asn1.h
* Definitions for ASN.1 BER dissection
*
* $Id: asn1.h,v 1.15 2003/11/09 22:57:52 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
*
* Based on "g_asn1.h" from:
*
* GXSNMP -- An snmp mangament application
* Copyright (C) 1998 Gregory McLean & Jochen Friedrich
* Beholder RMON ethernet network monitor,Copyright (C) 1993 DNPAP group
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#ifndef __ASN1_H__
#define __ASN1_H__
#define ASN1_UNI 0 /* Universal */
#define ASN1_APL 1 /* Application */
#define ASN1_CTX 2 /* Context */
#define ASN1_PRV 3 /* Private */
/* Tag */
#define ASN1_EOC 0 /* End Of Contents */
#define ASN1_BOL 1 /* Boolean */
#define ASN1_INT 2 /* Integer */
#define ASN1_BTS 3 /* Bit String */
#define ASN1_OTS 4 /* Octet String */
#define ASN1_NUL 5 /* Null */
#define ASN1_OJI 6 /* Object Identifier */
#define ASN1_OJD 7 /* Object Description */
#define ASN1_EXT 8 /* External */
#define ASN1_REAL 9 /* Real */
#define ASN1_ENUM 10 /* Enumerated */
#define ASN1_SEQ 16 /* Sequence */
#define ASN1_SET 17 /* Set */
#define ASN1_NUMSTR 18 /* Numerical String */
#define ASN1_PRNSTR 19 /* Printable String */
#define ASN1_TEXSTR 20 /* Teletext String */
#define ASN1_VIDSTR 21 /* Video String */
#define ASN1_IA5STR 22 /* IA5 String */
#define ASN1_UNITIM 23 /* Universal Time */
#define ASN1_GENTIM 24 /* General Time */
#define ASN1_GRASTR 25 /* Graphical String */
#define ASN1_VISSTR 26 /* Visible String */
#define ASN1_GENSTR 27 /* General String */
/* Primitive / Constructed */
#define ASN1_PRI 0 /* Primitive */
#define ASN1_CON 1 /* Constructed */
/*
* Oh, this is hellish.
*
* The CMU SNMP library defines an OID as a sequence of "u_int"s,
* unless EIGHTBIT_SUBIDS is defined, in which case it defines
* an OID as a sequence of "u_char"s. None of its header files
* define EIGHTBIT_SUBIDS, and if a program defines it, that's
* not going to change the library to treat OIDs as sequences
* of "u_chars", so I'll assume that it'll be "u_int"s.
*
* The UCD SNMP library does the same, except it defines an OID
* as a sequence of "u_long"s, by default.
*
* "libsmi" defines it as a sequence of "unsigned int"s.
*
* I don't want to oblige all users of ASN.1 to include the SNMP
* library header files, so I'll assume none of the SNMP libraries
* will rudely surprise me by changing the definition; if they
* do, there will be compiler warnings, so we'll at least be able
* to catch it.
*
* This requires that, if you're going to use "asn1_subid_decode()",
* "asn1_oid_value_decode()", or "asn1_oid_decode()", you include
* "config.h", to get the right #defines defined, so that we properly
* typedef "subid_t".
*/
#if defined(HAVE_SOME_SNMP)
typedef gulong subid_t; /* Net-SNMP or UCD SNMP */
#else
typedef guint subid_t; /* CMU SNMP, libsmi, or nothing */
#endif
#define ASN1_ERR_NOERROR 0 /* no error */
#define ASN1_ERR_EOC_MISMATCH 1
#define ASN1_ERR_WRONG_TYPE 2 /* type not right */
#define ASN1_ERR_LENGTH_NOT_DEFINITE 3 /* length should be definite */
#define ASN1_ERR_LENGTH_MISMATCH 4
#define ASN1_ERR_WRONG_LENGTH_FOR_TYPE 5 /* length wrong for type */
typedef struct _ASN1_SCK ASN1_SCK;
struct _ASN1_SCK
{ /* ASN1 socket */
tvbuff_t *tvb; /* Tvbuff whence the data comes */
int offset; /* Current offset in tvbuff */
};
extern void asn1_open (ASN1_SCK *asn1, tvbuff_t *tvb, int offset);
extern void asn1_close (ASN1_SCK *asn1, int *offset);
extern int asn1_octet_decode (ASN1_SCK *asn1, guchar *ch);
extern int asn1_tag_decode (ASN1_SCK *asn1, guint *tag);
extern int asn1_id_decode (ASN1_SCK *asn1, guint *cls, guint *con, guint *tag);
extern int asn1_id_decode1 (ASN1_SCK *asn1, guint *tag);
extern int asn1_length_decode (ASN1_SCK *asn1, gboolean *def, guint *len);
extern int asn1_header_decode(ASN1_SCK *asn1, guint *cls, guint *con,
guint *tag, gboolean *defp, guint *lenp);
extern int asn1_eoc (ASN1_SCK *asn1, int eoc);
extern int asn1_eoc_decode (ASN1_SCK *asn1, int eoc);
extern int asn1_null_decode (ASN1_SCK *asn1, int enc_len);
extern int asn1_bool_decode (ASN1_SCK *asn1, int enc_len, gboolean *boolean);
extern int asn1_int32_value_decode (ASN1_SCK *asn1, int enc_len,
gint32 *integer);
extern int asn1_int32_decode (ASN1_SCK *asn1, gint32 *integer, guint *nbytes);
extern int asn1_uint32_value_decode (ASN1_SCK *asn1, int enc_len,
guint32 *integer);
extern int asn1_uint32_decode (ASN1_SCK *asn1, guint32 *integer, guint *nbytes);
extern int asn1_bits_decode (ASN1_SCK *asn1, int enc_len, guchar **bits,
guint *len, guchar *unused);
extern int asn1_string_value_decode (ASN1_SCK *asn1, int enc_len,
guchar **octets);
extern int asn1_string_decode (ASN1_SCK *asn1, guchar **octets, guint *str_len,
guint *nbytes, guint expected_tag);
extern int asn1_octet_string_decode (ASN1_SCK *asn1, guchar **octets,
guint *str_len, guint *nbytes);
extern int asn1_subid_decode (ASN1_SCK *asn1, subid_t *subid);
extern int asn1_oid_value_decode (ASN1_SCK *asn1, int enc_len, subid_t **oid,
guint *len);
extern int asn1_oid_decode (ASN1_SCK *asn1, subid_t **oid, guint *len,
guint *nbytes);
extern int asn1_sequence_decode (ASN1_SCK *asn1, guint *seq_len, guint *nbytes);
extern char *asn1_err_to_str (int err);
#endif
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