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asn1.h

/* asn1.h
 * Definitions for ASN.1 BER dissection
 *
 * $Id: asn1.h 18197 2006-05-21 05:12:17Z sahlberg $
 *
 * Wireshark - Network traffic analyzer
 * By Gerald Combs <gerald@wireshark.org>
 *
 * 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             */


#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            */
};

#include <epan/dissectors/format-oid.h>

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 const char *asn1_err_to_str (int err);

#endif

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