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/* asn1.h
* Common data for ASN.1
* 2007 Anders Broman
*
* $Id$
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifndef __ASN1_H__
#define __ASN1_H__
typedef enum {
ASN1_ENC_BER, /* X.690 - BER, CER, DER */
ASN1_ENC_PER, /* X.691 - PER */
ASN1_ENC_ECN, /* X.692 - ECN */
ASN1_ENC_XER /* X.693 - XER */
} asn1_enc_e;
#define ASN1_CTX_SIGNATURE 0x41435458 /* "ACTX" */
typedef struct _asn1_ctx_t {
guint32 signature;
asn1_enc_e encoding;
gboolean aligned;
packet_info *pinfo;
proto_item *created_item;
void *value_ptr;
void *private_data;
struct {
tvbuff_t *data_value_descriptor;
int hf_index;
const char *direct_reference;
gint32 indirect_reference;
guint32 encoding;
tvbuff_t *single_asn1_type;
tvbuff_t *octet_aligned;
tvbuff_t *arbitrary;
union {
struct {
int (*ber_callback)(gboolean imp_tag, tvbuff_t *tvb, int offset, struct _asn1_ctx_t* ,proto_tree *tree, int hf_index );
tvbuff_t *direct_reference;
gint32 indirect_reference;
guint32 encoding;
tvbuff_t *single_asn1_type;
tvbuff_t *octet_aligned;
tvbuff_t *arbitrary;
} ber;
struct {
int (*type_cb)(tvbuff_t*, int, struct _asn1_ctx_t*, proto_tree*, int);
} per;
};
} external;
} asn1_ctx_t;
extern void asn1_ctx_init(asn1_ctx_t *actx, asn1_enc_e encoding, gboolean aligned, packet_info *pinfo);
extern gboolean asn1_ctx_check_signature(asn1_ctx_t *actx);
extern void asn1_ctx_clean_external(asn1_ctx_t *actx);
extern double asn1_get_real(const guint8 *real_ptr, gint real_len);
/* flags */
#define ASN1_EXT_ROOT 0x01
#define ASN1_EXT_EXT 0x02
#define ASN1_OPT 0x04
#define ASN1_DFLT 0x08
#define ASN1_HAS_EXT(f) ((f)&(ASN1_EXT_ROOT|ASN1_EXT_EXT))
#endif /* __ASN1_H__ */
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