forked from osmocom/wireshark
200 lines
11 KiB
C
200 lines
11 KiB
C
/* packet-ber.h
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* Helpers for ASN.1/BER dissection
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* Ronnie Sahlberg (C) 2004
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef __PACKET_BER_H__
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#define __PACKET_BER_H__
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#include <epan/proto.h>
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#include <epan/to_str.h>
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#include <epan/asn1.h>
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#include "ws_symbol_export.h"
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/* value for value and size constraints */
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#ifndef NO_BOUND
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#define NO_BOUND -1
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#endif
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typedef int (*ber_callback)(gboolean imp_tag, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index);
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typedef int (*ber_type_fn)(gboolean, tvbuff_t*, int, asn1_ctx_t *actx, proto_tree*, int);
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/* To be removed when the transition to the "New" type is complete */
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#define BER_CLASS_UNI 0
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#define BER_CLASS_APP 1
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#define BER_CLASS_CON 2
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#define BER_CLASS_PRI 3
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#define BER_CLASS_ANY 99 /* don't check class nor tag */
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#define BER_UNI_TAG_EOC 0 /* 'end-of-content' */
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#define BER_UNI_TAG_BOOLEAN 1
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#define BER_UNI_TAG_INTEGER 2
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#define BER_UNI_TAG_BITSTRING 3
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#define BER_UNI_TAG_OCTETSTRING 4
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#define BER_UNI_TAG_NULL 5
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#define BER_UNI_TAG_OID 6 /* OBJECT IDENTIFIER */
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#define BER_UNI_TAG_ObjectDescriptor 7
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#define BER_UNI_TAG_EXTERNAL 8
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#define BER_UNI_TAG_REAL 9
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#define BER_UNI_TAG_ENUMERATED 10
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#define BER_UNI_TAG_EMBEDDED_PDV 11
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#define BER_UNI_TAG_UTF8String 12
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#define BER_UNI_TAG_RELATIVE_OID 13
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/* UNIVERSAL 14-15
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* Reserved for future editions of this
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* Recommendation | International Standard
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*/
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#define BER_UNI_TAG_SEQUENCE 16 /* SEQUENCE, SEQUENCE OF */
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#define BER_UNI_TAG_SET 17 /* SET, SET OF */
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/* UNIVERSAL 18-22 Character string types */
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#define BER_UNI_TAG_NumericString 18
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#define BER_UNI_TAG_PrintableString 19
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#define BER_UNI_TAG_TeletexString 20 /* TeletextString, T61String */
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#define BER_UNI_TAG_VideotexString 21
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#define BER_UNI_TAG_IA5String 22
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/* UNIVERSAL 23-24 Time types */
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#define BER_UNI_TAG_UTCTime 23
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#define BER_UNI_TAG_GeneralizedTime 24
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/* UNIVERSAL 25-30 Character string types */
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#define BER_UNI_TAG_GraphicString 25
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#define BER_UNI_TAG_VisibleString 26 /* VisibleString, ISO64String */
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#define BER_UNI_TAG_GeneralString 27
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#define BER_UNI_TAG_UniversalString 28
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#define BER_UNI_TAG_CHARACTERSTRING 29
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#define BER_UNI_TAG_BMPString 30
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/* UNIVERSAL 31- ...
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* Reserved for addenda to this Recommendation | International Standard
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*/
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/* this function dissects the identifier octer of the BER TLV.
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* We only handle TAGs (and LENGTHs) that fit inside 32 bit integers.
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*/
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WS_DLL_PUBLIC int get_ber_identifier(tvbuff_t *tvb, int offset, gint8 *ber_class, gboolean *pc, gint32 *tag);
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WS_DLL_PUBLIC int dissect_ber_identifier(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint8 *ber_class, gboolean *pc, gint32 *tag);
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WS_DLL_PUBLIC int dissect_unknown_ber(packet_info *pinfo, tvbuff_t *tvb, int offset, proto_tree *tree);
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/* this function dissects the identifier octer of the BER TLV.
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* We only handle (TAGs and) LENGTHs that fit inside 32 bit integers.
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*/
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WS_DLL_PUBLIC int get_ber_length(tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind);
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WS_DLL_PUBLIC int dissect_ber_length(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32 *length, gboolean *ind);
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WS_DLL_PUBLIC int dissect_ber_tagged_type(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, gint8 tag_cls, gint32 tag_tag, gboolean tag_impl, ber_type_fn type);
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extern int dissect_ber_constrained_octet_string(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint32 min_len, gint32 max_len, gint hf_id, tvbuff_t **out_tvb);
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WS_DLL_PUBLIC int dissect_ber_octet_string(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb);
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WS_DLL_PUBLIC int dissect_ber_octet_string_with_encoding(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb, guint encoding);
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extern int dissect_ber_octet_string_wcb(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, ber_callback func);
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WS_DLL_PUBLIC int dissect_ber_integer64(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, gint64 *value);
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extern int dissect_ber_constrained_integer64(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint64 min_len, gint64 max_len, gint hf_id, gint64 *value);
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WS_DLL_PUBLIC int dissect_ber_integer(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, guint32 *value);
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extern int dissect_ber_constrained_integer(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint32 min_len, gint32 max_len, gint hf_id, guint32 *value);
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WS_DLL_PUBLIC int dissect_ber_null(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
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WS_DLL_PUBLIC int dissect_ber_boolean(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, gboolean *value);
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WS_DLL_PUBLIC int dissect_ber_real(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, double *value);
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extern int dissect_ber_external_type(gboolean implicit_tag, proto_tree *parent_tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, gint hf_id, ber_callback func);
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WS_DLL_PUBLIC int dissect_ber_EmbeddedPDV_Type(gboolean implicit_tag, proto_tree *parent_tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, gint hf_id, ber_callback func);
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#define BER_FLAGS_OPTIONAL 0x00000001
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#define BER_FLAGS_IMPLTAG 0x00000002
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#define BER_FLAGS_NOOWNTAG 0x00000004
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#define BER_FLAGS_NOTCHKTAG 0x00000008
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typedef struct _ber_sequence_t {
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const int *p_id;
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gint8 ber_class;
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gint32 tag;
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guint32 flags;
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ber_callback func;
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} ber_sequence_t;
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/*
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* This function dissects a BER sequence
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*/
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WS_DLL_PUBLIC int dissect_ber_sequence(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *parent_tree, tvbuff_t *tvb, int offset, const ber_sequence_t *seq, gint hf_id, gint ett_id);
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WS_DLL_PUBLIC int dissect_ber_set(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *parent_tree, tvbuff_t *tvb, int offset, const ber_sequence_t *seq, gint hf_id, gint ett_id);
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typedef struct _ber_choice_t {
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guint32 value;
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const int *p_id;
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gint8 ber_class;
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gint32 tag;
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guint32 flags;
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ber_callback func;
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} ber_choice_t;
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/*
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* This function dissects a BER choice
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*/
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WS_DLL_PUBLIC int dissect_ber_choice(asn1_ctx_t *actx, proto_tree *parent_tree, tvbuff_t *tvb, int offset, const ber_choice_t *ch, gint hf_id, gint ett_id, gint *branch_taken);
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/* To be removed when the transition to the "New" type is complete */
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/*
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* This function dissects a BER strings
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*/
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extern int dissect_ber_constrained_restricted_string(gboolean implicit_tag, gint32 type, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint32 min_len, gint32 max_len, gint hf_id, tvbuff_t **out_tvb);
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WS_DLL_PUBLIC int dissect_ber_restricted_string(gboolean implicit_tag, gint32 type, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb);
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extern int dissect_ber_GeneralString(asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, char *name_string, guint name_len);
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/* this function dissects a BER Object Identifier
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*/
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WS_DLL_PUBLIC int dissect_ber_object_identifier(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **value_tvb);
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WS_DLL_PUBLIC int dissect_ber_object_identifier_str(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, const char **value_stringx);
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/* this function dissects a BER Relative Object Identifier
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*/
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WS_DLL_PUBLIC int dissect_ber_relative_oid(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **value_tvb);
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WS_DLL_PUBLIC int dissect_ber_relative_oid_str(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, const char **value_stringx);
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/* this function dissects a BER sequence of
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*/
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extern int dissect_ber_constrained_sequence_of(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *parent_tree, tvbuff_t *tvb, int offset, gint32 min_len, gint32 max_len, const ber_sequence_t *seq, gint hf_id, gint ett_id);
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WS_DLL_PUBLIC int dissect_ber_sequence_of(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *parent_tree, tvbuff_t *tvb, int offset, const ber_sequence_t *seq, gint hf_id, gint ett_id);
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extern int dissect_ber_constrained_set_of(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *parent_tree, tvbuff_t *tvb, int offset, gint32 min_len, gint32 max_len, const ber_sequence_t *seq, gint hf_id, gint ett_id);
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WS_DLL_PUBLIC int dissect_ber_set_of(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *parent_tree, tvbuff_t *tvb, int offset, const ber_sequence_t *seq, gint hf_id, gint ett_id);
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WS_DLL_PUBLIC int dissect_ber_GeneralizedTime(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id);
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WS_DLL_PUBLIC int dissect_ber_UTCTime(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, char **datestrptr, guint32 *tvblen);
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extern int dissect_ber_constrained_bitstring(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *parent_tree, tvbuff_t *tvb, int offset, gint32 min_len, gint32 max_len, int * const *named_bits, int num_named_bits, gint hf_id, gint ett_id, tvbuff_t **out_tvb);
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WS_DLL_PUBLIC int dissect_ber_bitstring(gboolean implicit_tag, asn1_ctx_t *actx, proto_tree *parent_tree, tvbuff_t *tvb, int offset, int * const *named_bits, gint num_named_bits, gint hf_id, gint ett_id, tvbuff_t **out_tvb);
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WS_DLL_PUBLIC
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int call_ber_oid_callback(const char *oid, tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, void* data);
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WS_DLL_PUBLIC
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void register_ber_oid_dissector_handle(const char *oid, dissector_handle_t dissector, int proto, const char *name);
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WS_DLL_PUBLIC
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void register_ber_oid_dissector(const char *oid, dissector_t dissector, int proto, const char *name);
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WS_DLL_PUBLIC
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void register_ber_syntax_dissector(const char *syntax, int proto, dissector_t dissector);
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void register_ber_oid_name(const char *oid, const char *name);
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WS_DLL_PUBLIC
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void register_ber_oid_syntax(const char *oid, const char *name, const char *syntax);
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int dissect_ber_oid_NULL_callback(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data);
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WS_DLL_PUBLIC
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void ber_decode_as_foreach(GHFunc func, gpointer user_data); /* iterate through known syntaxes */
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WS_DLL_PUBLIC
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void ber_decode_as(const gchar *syntax); /* decode the current capture as this syntax */
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WS_DLL_PUBLIC
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void ber_set_filename(gchar *filename); /* name of current BER-encoded file */
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WS_DLL_PUBLIC
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gboolean oid_has_dissector(const char *oid);
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#endif /* __PACKET_BER_H__ */
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