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Diffstat (limited to 'epan/dissectors/packet-ber.h')
| -rw-r--r-- | epan/dissectors/packet-ber.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/epan/dissectors/packet-ber.h b/epan/dissectors/packet-ber.h new file mode 100644 index 00000000..0d96e53d --- /dev/null +++ b/epan/dissectors/packet-ber.h @@ -0,0 +1,197 @@ +/* packet-ber.h + * Helpers for ASN.1/BER dissection + * Ronnie Sahlberg (C) 2004 + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * SPDX-License-Identifier: GPL-2.0-or-later + */ + +#ifndef __PACKET_BER_H__ +#define __PACKET_BER_H__ + +#include <epan/proto.h> +#include <epan/to_str.h> +#include <epan/asn1.h> +#include "ws_symbol_export.h" + +/* value for value and size constraints */ +#ifndef NO_BOUND +#define NO_BOUND -1 +#endif + +typedef int (*ber_callback)(bool imp_tag, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, proto_tree *tree, int hf_index); +typedef int (*ber_type_fn)(bool, tvbuff_t*, int, asn1_ctx_t *actx, proto_tree*, int); +/* To be removed when the transition to the "New" type is complete */ + +#define BER_CLASS_UNI 0 +#define BER_CLASS_APP 1 +#define BER_CLASS_CON 2 +#define BER_CLASS_PRI 3 +#define BER_CLASS_ANY 99 /* don't check class nor tag */ + +#define BER_UNI_TAG_EOC 0 /* 'end-of-content' */ +#define BER_UNI_TAG_BOOLEAN 1 +#define BER_UNI_TAG_INTEGER 2 +#define BER_UNI_TAG_BITSTRING 3 +#define BER_UNI_TAG_OCTETSTRING 4 +#define BER_UNI_TAG_NULL 5 +#define BER_UNI_TAG_OID 6 /* OBJECT IDENTIFIER */ +#define BER_UNI_TAG_ObjectDescriptor 7 +#define BER_UNI_TAG_EXTERNAL 8 +#define BER_UNI_TAG_REAL 9 +#define BER_UNI_TAG_ENUMERATED 10 +#define BER_UNI_TAG_EMBEDDED_PDV 11 +#define BER_UNI_TAG_UTF8String 12 +#define BER_UNI_TAG_RELATIVE_OID 13 +/* UNIVERSAL 14-15 + * Reserved for future editions of this + * Recommendation | International Standard + */ +#define BER_UNI_TAG_SEQUENCE 16 /* SEQUENCE, SEQUENCE OF */ +#define BER_UNI_TAG_SET 17 /* SET, SET OF */ +/* UNIVERSAL 18-22 Character string types */ +#define BER_UNI_TAG_NumericString 18 +#define BER_UNI_TAG_PrintableString 19 +#define BER_UNI_TAG_TeletexString 20 /* TeletextString, T61String */ +#define BER_UNI_TAG_VideotexString 21 +#define BER_UNI_TAG_IA5String 22 +/* UNIVERSAL 23-24 Time types */ +#define BER_UNI_TAG_UTCTime 23 +#define BER_UNI_TAG_GeneralizedTime 24 +/* UNIVERSAL 25-30 Character string types */ +#define BER_UNI_TAG_GraphicString 25 +#define BER_UNI_TAG_VisibleString 26 /* VisibleString, ISO64String */ +#define BER_UNI_TAG_GeneralString 27 +#define BER_UNI_TAG_UniversalString 28 +#define BER_UNI_TAG_CHARACTERSTRING 29 +#define BER_UNI_TAG_BMPString 30 +/* UNIVERSAL 31- ... + * Reserved for addenda to this Recommendation | International Standard + */ + + +/* this function dissects the identifier octer of the BER TLV. + * We only handle TAGs (and LENGTHs) that fit inside 32 bit integers. + */ +WS_DLL_PUBLIC int get_ber_identifier(tvbuff_t *tvb, int offset, gint8 *ber_class, bool *pc, gint32 *tag); +WS_DLL_PUBLIC int dissect_ber_identifier(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, gint8 *ber_class, bool *pc, gint32 *tag); +WS_DLL_PUBLIC int dissect_unknown_ber(packet_info *pinfo, tvbuff_t *tvb, int offset, proto_tree *tree); +/* this function dissects the identifier octer of the BER TLV. + * We only handle (TAGs and) LENGTHs that fit inside 32 bit integers. + */ +WS_DLL_PUBLIC int get_ber_length(tvbuff_t *tvb, int offset, guint32 *length, bool *ind); +WS_DLL_PUBLIC int dissect_ber_length(packet_info *pinfo, proto_tree *tree, tvbuff_t *tvb, int offset, guint32 *length, bool *ind); + +WS_DLL_PUBLIC int dissect_ber_tagged_type(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, gint8 tag_cls, gint32 tag_tag, bool tag_impl, ber_type_fn type); + +extern int dissect_ber_constrained_octet_string(bool 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); +WS_DLL_PUBLIC int dissect_ber_octet_string(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb); +WS_DLL_PUBLIC int dissect_ber_octet_string_with_encoding(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb, guint encoding); +extern int dissect_ber_octet_string_wcb(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, ber_callback func); + +WS_DLL_PUBLIC int dissect_ber_integer64(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, gint64 *value); +extern int dissect_ber_constrained_integer64(bool 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); + +WS_DLL_PUBLIC int dissect_ber_integer(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, guint32 *value); +extern int dissect_ber_constrained_integer(bool 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); + +WS_DLL_PUBLIC int dissect_ber_null(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id); + +WS_DLL_PUBLIC int dissect_ber_boolean(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, bool *value); +WS_DLL_PUBLIC int dissect_ber_real(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, double *value); + +extern int dissect_ber_external_type(bool implicit_tag, proto_tree *parent_tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, gint hf_id, ber_callback func); +WS_DLL_PUBLIC int dissect_ber_EmbeddedPDV_Type(bool implicit_tag, proto_tree *parent_tree, tvbuff_t *tvb, int offset, asn1_ctx_t *actx, gint hf_id, ber_callback func); + +#define BER_FLAGS_OPTIONAL 0x00000001 +#define BER_FLAGS_IMPLTAG 0x00000002 +#define BER_FLAGS_NOOWNTAG 0x00000004 +#define BER_FLAGS_NOTCHKTAG 0x00000008 +typedef struct _ber_sequence_t { + const int *p_id; + gint8 ber_class; + gint32 tag; + guint32 flags; + ber_callback func; +} ber_sequence_t; + +/* + * This function dissects a BER sequence + */ +WS_DLL_PUBLIC int dissect_ber_sequence(bool 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); +WS_DLL_PUBLIC int dissect_ber_set(bool 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); + +typedef struct _ber_choice_t { + guint32 value; + const int *p_id; + gint8 ber_class; + gint32 tag; + guint32 flags; + ber_callback func; +} ber_choice_t; + +/* + * This function dissects a BER choice + */ +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); +/* To be removed when the transition to the "New" type is complete */ + +/* + * This function dissects a BER strings + */ +extern int dissect_ber_constrained_restricted_string(bool 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); +WS_DLL_PUBLIC int dissect_ber_restricted_string(bool implicit_tag, gint32 type, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **out_tvb); +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); + + +/* this function dissects a BER Object Identifier + */ +WS_DLL_PUBLIC int dissect_ber_object_identifier(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **value_tvb); +WS_DLL_PUBLIC int dissect_ber_object_identifier_str(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, const char **value_stringx); + +/* this function dissects a BER Relative Object Identifier + */ +WS_DLL_PUBLIC int dissect_ber_relative_oid(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, tvbuff_t **value_tvb); +WS_DLL_PUBLIC int dissect_ber_relative_oid_str(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, const char **value_stringx); + +/* this function dissects a BER sequence of + */ +extern int dissect_ber_constrained_sequence_of(bool 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); +WS_DLL_PUBLIC int dissect_ber_sequence_of(bool 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); + +extern int dissect_ber_constrained_set_of(bool 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); +WS_DLL_PUBLIC int dissect_ber_set_of(bool 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); + +WS_DLL_PUBLIC int dissect_ber_GeneralizedTime(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id); + +WS_DLL_PUBLIC int dissect_ber_UTCTime(bool implicit_tag, asn1_ctx_t *actx, proto_tree *tree, tvbuff_t *tvb, int offset, gint hf_id, char **datestrptr, guint32 *tvblen); + +extern int dissect_ber_constrained_bitstring(bool 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); +WS_DLL_PUBLIC int dissect_ber_bitstring(bool 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); + +WS_DLL_PUBLIC +int call_ber_oid_callback(const char *oid, tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, void* data); +WS_DLL_PUBLIC +void register_ber_oid_dissector_handle(const char *oid, dissector_handle_t dissector, int proto, const char *name); +WS_DLL_PUBLIC +void register_ber_oid_dissector(const char *oid, dissector_t dissector, int proto, const char *name); +WS_DLL_PUBLIC +void register_ber_syntax_dissector(const char *syntax, int proto, dissector_t dissector); +void register_ber_oid_name(const char *oid, const char *name); +WS_DLL_PUBLIC +void register_ber_oid_syntax(const char *oid, const char *name, const char *syntax); +int dissect_ber_oid_NULL_callback(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data); + +WS_DLL_PUBLIC +void ber_decode_as_foreach(GHFunc func, gpointer user_data); /* iterate through known syntaxes */ + +WS_DLL_PUBLIC +bool oid_has_dissector(const char *oid); + +WS_DLL_PUBLIC +void add_ber_encoded_label(tvbuff_t* tvb, packet_info* pinfo, proto_tree* tree); +#endif /* __PACKET_BER_H__ */ + |