/* packet-wmio.c * Wireshark's WMIO dissector. * * Copyright 2024, Hiddencodes Sec * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #include "packet-dcerpc.h" #include void proto_register_WMIO (void); void proto_reg_handoff_WMIO (void); static int proto_WMIO; /* IWbemClassObject Interface * https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-wmi/46710c5c-d7ab-4e4c-b4a5-ebff311fdcd1 * dc12a681-737f-11cf-884d-00aa004b2e24 */ static e_guid_t iid_WMIO = { 0xdc12a681, 0x737f, 0x11cf, { 0x88, 0x4d, 0x00, 0xaa, 0x00, 0x4b, 0x2e, 0x24} }; static uint32_t wmio_signature = 0x12345678; #define CLASS_HEADER_LENGTH 13 #define WMIO_OBJECT_FLAG_CIM_CLASS 0X01 #define WMIO_OBJECT_FLAG_CIM_INSTANCE 0X02 #define WMIO_OBJECT_FLAG_HAS_DECORATION 0X04 #define WMIO_OBJECT_FLAG_PROTOTYPE_RESULT_OBJECT 0X10 #define WMIO_OBJECT_FLAG_KEY_PROPERTY_MISSING 0X40 #define WBEM_FLAVOR_FLAG_PROPAGATE_TO_INSTANCE 0x01 #define WBEM_FLAVOR_FLAG_PROPAGATE_TO_DERIVED_CLASS 0x02 #define WBEM_FLAVOR_NOT_OVERRIDABLE 0x10 #define WBEM_FLAVOR_ORIGIN_PROPAGATED 0x20 #define WBEM_FLAVOR_ORIGIN_SYSTEM 0x40 #define WBEM_FLAVOR_AMENDED 0x80 #define CIM_ARRAY_FLAG 0x2000 #define INHERITED_PROPERTY_TYPE 0x4000 /* CimType * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/e137e6c6-c1cc-449e-a0b4-76fabf534480 * CimType is a 32-bit value of which only the lower 16 bits are used. */ #define CIM_TYPE_SINT16 2 #define CIM_TYPE_SINT32 3 #define CIM_TYPE_REAL32 4 #define CIM_TYPE_REAL64 5 #define CIM_TYPE_STRING 8 #define CIM_TYPE_BOOLEAN 11 #define CIM_TYPE_OBJECT 13 #define CIM_TYPE_SINT8 16 #define CIM_TYPE_UINT8 17 #define CIM_TYPE_UINT16 18 #define CIM_TYPE_UINT32 19 #define CIM_TYPE_SINT64 20 #define CIM_TYPE_UINT64 21 #define CIM_TYPE_DATETIME 101 #define CIM_TYPE_REFERENCE 102 #define CIM_TYPE_CHAR16 103 #define CIM_ARRAY_TYPE(X) (CIM_ARRAY_FLAG | X) #define CIM_ARRAY_SINT8 CIM_ARRAY_TYPE(CIM_TYPE_SINT8) #define CIM_ARRAY_UINT8 CIM_ARRAY_TYPE(CIM_TYPE_UINT8) #define CIM_ARRAY_SINT16 CIM_ARRAY_TYPE(CIM_TYPE_SINT16) #define CIM_ARRAY_UINT16 CIM_ARRAY_TYPE(CIM_TYPE_UINT16) #define CIM_ARRAY_SINT32 CIM_ARRAY_TYPE(CIM_TYPE_SINT32) #define CIM_ARRAY_UINT32 CIM_ARRAY_TYPE(CIM_TYPE_UINT32) #define CIM_ARRAY_SINT64 CIM_ARRAY_TYPE(CIM_TYPE_SINT64) #define CIM_ARRAY_UINT64 CIM_ARRAY_TYPE(CIM_TYPE_UINT64) #define CIM_ARRAY_REAL32 CIM_ARRAY_TYPE(CIM_TYPE_REAL32) #define CIM_ARRAY_REAL64 CIM_ARRAY_TYPE(CIM_TYPE_REAL64) #define CIM_ARRAY_BOOLEAN CIM_ARRAY_TYPE(CIM_TYPE_BOOLEAN) #define CIM_ARRAY_STRING CIM_ARRAY_TYPE(CIM_TYPE_STRING) #define CIM_ARRAY_DATETIME CIM_ARRAY_TYPE(CIM_TYPE_DATETIME) #define CIM_ARRAY_REFERENCE CIM_ARRAY_TYPE(CIM_TYPE_REFERENCE) #define CIM_ARRAY_CHAR16 CIM_ARRAY_TYPE(CIM_TYPE_CHAR16) #define CIM_ARRAY_OBJECT CIM_ARRAY_TYPE(CIM_TYPE_OBJECT) #define STRINGFY(X) { X, #X} static const value_string cim_types[] = { STRINGFY(CIM_TYPE_SINT8), STRINGFY(CIM_TYPE_UINT8), STRINGFY(CIM_TYPE_SINT16), STRINGFY(CIM_TYPE_UINT16), STRINGFY(CIM_TYPE_SINT32), STRINGFY(CIM_TYPE_UINT32), STRINGFY(CIM_TYPE_SINT64), STRINGFY(CIM_TYPE_UINT64), STRINGFY(CIM_TYPE_REAL32), STRINGFY(CIM_TYPE_REAL64), STRINGFY(CIM_TYPE_BOOLEAN), STRINGFY(CIM_TYPE_STRING), STRINGFY(CIM_TYPE_DATETIME), STRINGFY(CIM_TYPE_REFERENCE), STRINGFY(CIM_TYPE_CHAR16), STRINGFY(CIM_TYPE_OBJECT), STRINGFY(CIM_ARRAY_SINT8), STRINGFY(CIM_ARRAY_UINT8), STRINGFY(CIM_ARRAY_SINT16), STRINGFY(CIM_ARRAY_UINT16), STRINGFY(CIM_ARRAY_SINT32), STRINGFY(CIM_ARRAY_UINT32), STRINGFY(CIM_ARRAY_SINT64), STRINGFY(CIM_ARRAY_UINT64), STRINGFY(CIM_ARRAY_REAL32), STRINGFY(CIM_ARRAY_REAL64), STRINGFY(CIM_ARRAY_BOOLEAN), STRINGFY(CIM_ARRAY_STRING), STRINGFY(CIM_ARRAY_DATETIME), STRINGFY(CIM_ARRAY_REFERENCE), STRINGFY(CIM_ARRAY_CHAR16), STRINGFY(CIM_ARRAY_OBJECT), { 0, NULL } }; static int hf_wmio; static int hf_wmio_signature; static int hf_wmio_objectencodinglength; static int hf_wmio_object_flags; static int hf_wmio_object_flags_cim_class; static int hf_wmio_object_flags_cim_instance; static int hf_wmio_object_flags_has_decoration; static int hf_wmio_object_flags_prototype_result_object; static int hf_wmio_object_flags_key_property_missing; static int hf_wmio_decoration; static int hf_wmio_decoration_server_name; static int hf_wmio_decoration_namespace; static int hf_wmio_encoded_string; static int hf_wmio_encoded_string_flags; static int hf_wmio_encoded_string_flags_unicode; static int hf_wmio_class_part; static int hf_wmio_class_header; static int hf_wmio_class_header_partlength; static int hf_wmio_class_header_nameref; static int hf_wmio_class_header_ndtablevaluetablelength; static int hf_wmio_class_derivation; static int hf_wmio_class_derivation_length; static int hf_wmio_derivation_classname; static int hf_wmio_class_name_length; static int hf_wmio_qualifierset; static int hf_wmio_qualifierset_length; static int hf_wmio_qualifier; static int hf_wmio_qualifiername; static int hf_wmio_cimtype; static int hf_wmio_qualifiervalue; static int hf_wmio_bytes; static int hf_wmio_flavor; static int hf_wmio_flavor_propagate_to_instance; static int hf_wmio_flavor_propagate_to_derived_class; static int hf_wmio_flavor_not_overridable; static int hf_wmio_flavor_origin_propagated; static int hf_wmio_flavor_origin_system; static int hf_wmio_flavor_amended; static int hf_wmio_propertylookuptable; static int hf_wmio_propertylookuptable_count; static int hf_wmio_propertylookup; static int hf_wmio_propertynameref; static int hf_wmio_propertyinforef; static int hf_wmio_ndtable; static int hf_wmio_heap; static int hf_wmio_heap_length; static int hf_methodspart; static int hf_methodspart_length; static int hf_methodspart_methodcount; static int hf_methodspart_methods; static int hf_methodspart_methoddescription; static int hf_methoddescription_methodname; static int hf_methoddescription_methodflags; static int hf_methoddescription_methodqualifiers; static int hf_parentclass; static int hf_currentclass; static int hf_methoddescription_methodorigin; static int hf_methoddescription_inputsignature; static int hf_methoddescription_outputsignature; static int hf_heap_offset; static int hf_property_info; static int hf_declaration_order; static int hf_propertyinfo_inherited; static int hf_propertyinfo_valuetableoffset; static int hf_propertyinfo_classoforigin; static int hf_methodsignature_offset; static hf_register_info hf[] = { { &hf_wmio, { "WMIO", "wmio", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_signature, { "Signature", "wmio.signature", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_objectencodinglength, { "Object Encoding Length", "wmio.objectencodinglength", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_object_flags, { "Object flags", "wmio.objectflags", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_object_flags_cim_class, { "CIM Class", "wmio.objectflags.cim_class", FT_BOOLEAN, 8, NULL, WMIO_OBJECT_FLAG_CIM_CLASS, NULL, HFILL }}, { &hf_wmio_object_flags_cim_instance, { "CIM Instance", "wmio.objectflags.cim_Instance", FT_BOOLEAN, 8, NULL, WMIO_OBJECT_FLAG_CIM_INSTANCE, NULL, HFILL }}, { &hf_wmio_object_flags_has_decoration, { "Has Decoration", "wmio.objectflags.has_decoration", FT_BOOLEAN, 8, NULL, WMIO_OBJECT_FLAG_HAS_DECORATION, NULL, HFILL }}, { &hf_wmio_object_flags_prototype_result_object, { "Prototype Result Object", "wmio.objectflags.prototype_result_object", FT_BOOLEAN, 8, NULL, WMIO_OBJECT_FLAG_PROTOTYPE_RESULT_OBJECT, NULL, HFILL }}, { &hf_wmio_object_flags_key_property_missing, { "Key Property Missing", "wmio.objectflags.key_property_missing", FT_BOOLEAN, 8, NULL, WMIO_OBJECT_FLAG_KEY_PROPERTY_MISSING, NULL, HFILL }}, { &hf_wmio_encoded_string, { "Encoded String", "wmio.encoded_string", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_encoded_string_flags, { "Flag", "wmio.encoded_string.flags", FT_UINT8, BASE_HEX, NULL, 0, NULL, HFILL }}, { &hf_wmio_encoded_string_flags_unicode, { "Unicode", "wmio.encoded_string.flags.unicode", FT_BOOLEAN, 8, NULL, 0x1, NULL, HFILL }}, { &hf_wmio_decoration, { "Decoration", "wmio.decoration", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_decoration_server_name, { "CIM Server Name", "wmio.decoration.server_name", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_decoration_namespace, { "CIM Namespace", "wmio.decoration.namespace", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_class_part, { "Class Part", "wmio.class.part", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_wmio_class_header, { "Class Header", "wmio.class.header", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_wmio_class_header_partlength, { "Class Header ClassPart Length", "wmio.class.header.length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_class_header_nameref, { "Class Name Reference", "wmio.class.header.nameref", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_class_header_ndtablevaluetablelength, { "NdTable ValueTable Length", "wmio.class.header.ndtablevaluetablelength", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_class_derivation, { "Class Derivation", "wmio.class.derivation", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_wmio_class_derivation_length, { "Class Derivation Length", "wmio.class.derivation.length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_derivation_classname, { "Derivation", "wmio.derivation.classname", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_class_name_length, { "Class Name Length", "wmio.derivation.classname_length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_qualifierset, { "Qualifier Set", "wmio.qualifierset", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_qualifierset_length, { "Qualifier Length", "wmio.derivation.qualifier_length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_qualifier, { "Qualifier", "wmio.qualifier", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_qualifiername, { "Qualifier Name", "wmio.qualifier_name", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_flavor, { "Flavor", "wmio.flavor", FT_UINT8, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_flavor_propagate_to_instance, { "Propagate To Derived Instance", "wmio.flavor.propagate_to_instance", FT_BOOLEAN, 8, NULL, WBEM_FLAVOR_FLAG_PROPAGATE_TO_INSTANCE, NULL, HFILL }}, { &hf_wmio_flavor_propagate_to_derived_class, { "Propagate To Derived Class", "wmio.flavor.propagate_to_derived_class", FT_BOOLEAN, 8, NULL, WBEM_FLAVOR_FLAG_PROPAGATE_TO_DERIVED_CLASS, NULL, HFILL }}, { &hf_wmio_flavor_not_overridable, { "Not Overridable", "wmio.flavor.not_overridable", FT_BOOLEAN, 8, NULL, WBEM_FLAVOR_NOT_OVERRIDABLE, NULL, HFILL }}, { &hf_wmio_flavor_origin_propagated, { "Origin Propagated", "wmio.flavor.origin_propagated", FT_BOOLEAN, 8, NULL, WBEM_FLAVOR_ORIGIN_PROPAGATED, NULL, HFILL }}, { &hf_wmio_flavor_origin_system, { "Origin System", "wmio.flavor.origin_system", FT_BOOLEAN, 8, NULL, WBEM_FLAVOR_ORIGIN_SYSTEM, NULL, HFILL }}, { &hf_wmio_flavor_amended, { "Amended", "wmio.flavor.amended", FT_BOOLEAN, 8, NULL, WBEM_FLAVOR_AMENDED, NULL, HFILL }}, { &hf_wmio_cimtype, { "CIM Type", "wmio.cim_type", FT_UINT32, BASE_HEX, VALS(cim_types), 0, NULL, HFILL }}, { &hf_wmio_propertylookuptable, { "Property Lookup Table", "wmio.property_lookup_table", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_propertylookuptable_count, { "Property Lookup Table Count", "wmio.property_lookup_table.count", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_ndtable, { "NdTable", "wmio.ndtable", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_propertylookup, { "Property Lookup", "wmio.property_lookup", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_propertynameref, { "Property Name Ref", "wmio.property_lookup.propertynameref", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_propertyinforef, { "Property Info Ref", "wmio.property_lookup.propertyinforef", FT_UINT32, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_heap, { "Heap", "wmio.heap", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_heap_length, { "HeapLength", "wmio.heap.length", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL }}, { &hf_wmio_bytes, { "WMIO Bytes", "wmio.bytes", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_methodspart, { "Methodspart", "wmio.methodspart", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_methodspart_length, { "Methodspart Length", "wmio.methodspart.length", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_methodspart_methodcount, { "Methods Count", "wmio.methodspart.methodcount", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_methodspart_methods, { "Methods", "wmio.methodspart.methods", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_methodspart_methoddescription, { "MethodDescription", "wmio.methodspart.methoddescription", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_methoddescription_methodname, { "Methodname", "wmio.methodspart.methoddescription.methodname", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_methoddescription_methodflags, { "Methodflags", "wmio.methodspart.methoddescription.methodflags", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_methoddescription_methodorigin, { "Methodorigin", "wmio.methodspart.methoddescription.methodorigin", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_methoddescription_methodqualifiers, { "Methodqualifiers", "wmio.methodspart.methoddescription.methodqualifiers", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_methoddescription_inputsignature, { "Inputsignature", "wmio.methodspart.methoddescription.inputsignature", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_methoddescription_outputsignature, { "Outputsignature", "wmio.methodspart.methoddescription.outputsignature", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_parentclass, { "Parent Class", "wmio.parentclass", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_currentclass, { "Current Class", "wmio.currentclass", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_heap_offset, { "Heap Offset", "wmio.heapoffset", FT_UINT32, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_wmio_qualifiervalue, { "Qualifier Value", "wmio.qualifier_value", FT_STRINGZ, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_property_info, { "Property Info", "wmio.property_info", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_declaration_order, { "Declaration Order", "wmio.declaration_order", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_propertyinfo_inherited, { "Inherited", "wmio.propertytype.inherited", FT_BOOLEAN, 32, NULL, INHERITED_PROPERTY_TYPE, NULL, HFILL }}, { &hf_propertyinfo_valuetableoffset, { "ValueTable Offset", "wmio.propertytype.valuetableoffset", FT_UINT32, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_propertyinfo_classoforigin, { "ClassOfOrigin", "wmio.propertytype.classoforigin", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_methodsignature_offset, { "Methodsignature Offset", "wmio.methodsignature.offset", FT_UINT32, BASE_HEX_DEC, NULL, 0x0, NULL, HFILL }}, }; static int * const wmio_object_flags[] = { &hf_wmio_object_flags_cim_class, &hf_wmio_object_flags_cim_instance, &hf_wmio_object_flags_has_decoration, &hf_wmio_object_flags_prototype_result_object, &hf_wmio_object_flags_key_property_missing, NULL }; static int * const wmio_flavor[] = { &hf_wmio_flavor_propagate_to_instance, &hf_wmio_flavor_propagate_to_derived_class, &hf_wmio_flavor_not_overridable, &hf_wmio_flavor_origin_propagated, &hf_wmio_flavor_origin_system, &hf_wmio_flavor_amended, NULL }; static int * const wmio_encoded_string_flags[] = { &hf_wmio_encoded_string_flags_unicode, NULL }; static int ett_wmio; static int ett_wmio_object_flags; static int ett_wmio_encoded_string; static int ett_wmio_encoded_string_flags; static int ett_wmio_class_part; static int ett_wmio_class_header; static int ett_wmio_decoration; static int ett_wmio_class_derivation; static int ett_wmio_qualifierset; static int ett_wmio_qualifier; static int ett_wmio_flavor; static int ett_wmio_propertylookuptable; static int ett_wmio_propertylookup; static int ett_wmio_heap; static int ett_methodspart; static int ett_parentclass; static int ett_currentclass; static int ett_methodspart_methods; static int ett_methodspart_methoddescription; static int ett_methodsignature; static int ett_property_info; /* Tree */ static int *ett[] = { &ett_wmio, &ett_wmio_object_flags, &ett_wmio_encoded_string, &ett_wmio_encoded_string_flags, &ett_wmio_class_part, &ett_wmio_class_header, &ett_wmio_decoration, &ett_wmio_class_derivation, &ett_wmio_qualifierset, &ett_wmio_qualifier, &ett_wmio_flavor, &ett_wmio_propertylookuptable, &ett_wmio_propertylookup, &ett_wmio_heap, &ett_methodspart, &ett_methodspart_methods, &ett_methodspart_methoddescription, &ett_methodsignature, &ett_parentclass, &ett_currentclass, &ett_property_info, }; static int dissect_wmio_objectblock(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree); static int dissect_wmio_object_decoration(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree); static int dissect_wmio_encoded_string(tvbuff_t *tvb, int offset, int hfindex, packet_info *pinfo, proto_tree *tree, bool withlength, int heapoffset); static int dissect_wmio_encoding_classtype(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree); static int dissect_wmio_encoding_classandmethodspart(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, int hf_index, int ett, bool methods); static int dissect_wmio_encoding_classpart(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree); static int dissect_wmio_encoding_classheader(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, uint32_t *pPartlength, uint32_t *pNdLength, int classheapoffset); static int dissect_wmio_encoding_methodpart(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree); static int dissect_wmio_encoding_methodpart_methods(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, uint32_t methodscount, int methodsheapoffset); static int dissect_wmio_encoding_methodpart_methoddescription(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, int methodsheapoffset); static int dissect_wmio_encoding_derivationlist(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree); static int dissect_wmio_encoding_qualifierset(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, int classheapoffset); /* DictionaryReference * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/40adf451-f5bc-4b0a-ab97-d620bb638470 */ static const char* stringDictionary[] = { "'" , "key" , "" , "read" , "write" , "volatile" , "provider" , "dynamic" , "cimwin32" , "DWORD" , "CIMTYPE" }; /* Encoded-String * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/2f3afcf6-169e-41ff-80c2-367f2f74285b * Encoded-String = Encoded-String-Flag *Character Null * Encoded-String-Flag = OCTET * Character = AnsiCharacter / UnicodeCharacter * Null = Character * AnsiCharacter = OCTET * UnicodeCharacter = 2OCTET */ static int dissect_wmio_encoded_string(tvbuff_t *tvb, int offset, int hfindex, packet_info *pinfo, proto_tree *tree, bool withlength, int heapoffset) { proto_item *sub_item; proto_tree *sub_tree; int old_offset = offset; int fn_len = 0; header_field_info *hfinfo; char *s= NULL; uint32_t foffset = 0; /* Make sure this really is a string field. */ hfinfo = proto_registrar_get_nth(hfindex); DISSECTOR_ASSERT_FIELD_TYPE(hfinfo, FT_STRINGZ); if(heapoffset > 0){ /* HeapRef * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/f9d22d98-ed26-45d7-8792-aa0f210cffb2 * HeapRef is a reference to any HeapItem and is expressed in 31 bits. If the HeapItem referred to is a string, * and the most significant bit of the 32-bit HeapStringRef value is set, the reference is actually to an implied * dictionary-based string entry and does not point to a literal Encoded-String within the Heap. */ foffset = tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN); if (foffset < 0x80000000){ offset = heapoffset + foffset; } } sub_item = proto_tree_add_item(tree, hf_wmio_encoded_string, tvb, offset, -1, ENC_NA); sub_tree = proto_item_add_subtree(sub_item, ett_wmio_encoded_string); if((heapoffset > 0) && (foffset >= 0x80000000)){ proto_tree_add_item(sub_tree, hf_heap_offset, tvb, old_offset, 4, ENC_LITTLE_ENDIAN); /* https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/f9d22d98-ed26-45d7-8792-aa0f210cffb2 * If the value of HeapRef is 0xFFFFFFFF, then HeapItem is not present and MUST be considered NULL. */ if(foffset == 0xFFFFFFFF){ /* NULL String */ proto_item_set_text(sub_tree, "%s: %s", proto_registrar_get_name(hfindex), "NULL"); proto_item_set_len(sub_item, 4); } else { if (foffset & 0x80000000){ foffset = 0x7FFFFFFF & foffset; if (foffset < array_length(stringDictionary)){ proto_item_set_text(sub_tree, "%s: %s", proto_registrar_get_name(hfindex), stringDictionary[foffset]); } else { proto_item_set_text(sub_tree, "%s: Unknown Index %d", proto_registrar_get_name(hfindex), hfindex); } proto_item_set_len(sub_item, 4); } } } else { uint64_t encoded_string_flags; if(heapoffset > 0){ proto_tree_add_item(sub_tree, hf_heap_offset, tvb, old_offset, 4, ENC_LITTLE_ENDIAN); } old_offset = offset; proto_tree_add_bitmask_ret_uint64(sub_tree, tvb, offset, hf_wmio_encoded_string_flags, ett_wmio_encoded_string_flags, wmio_encoded_string_flags, ENC_NA, &encoded_string_flags); offset++; if (encoded_string_flags == 0){ /* ASCII */ proto_tree_add_item_ret_length(sub_tree, hfindex, tvb, offset, -1, ENC_ASCII, &fn_len); s = tvb_get_string_enc(pinfo->pool, tvb, offset, fn_len, ENC_ASCII); } else if (encoded_string_flags == 1){ /* UNICODE */ proto_tree_add_item_ret_length(sub_tree, hfindex, tvb, offset, -1, ENC_UTF_16|ENC_LITTLE_ENDIAN, &fn_len); s = tvb_get_string_enc(pinfo->pool, tvb, offset, fn_len, ENC_UTF_16); } offset += fn_len; proto_item_set_text(sub_tree, "%s: %s", proto_registrar_get_name(hfindex), s); if(withlength){ proto_tree_add_item(sub_tree, hf_wmio_class_name_length, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset += 4; } proto_item_set_len(sub_item, offset-old_offset); } return offset; } /* ObjectBlock * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/4e74c9f9-4a47-4111-9e67-6476c896b7fb * ObjectBlock = ObjectFlags [Decoration] Encoding */ static int // NOLINTNEXTLINE(misc-no-recursion) dissect_wmio_objectblock(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) { int8_t flags = tvb_get_uint8(tvb, offset); proto_tree_add_bitmask(tree, tvb, offset, hf_wmio_object_flags, ett_wmio_object_flags, wmio_object_flags, ENC_NA); offset+=1; increment_dissection_depth(pinfo); if (WMIO_OBJECT_FLAG_HAS_DECORATION & flags){ offset = dissect_wmio_object_decoration(tvb, offset, pinfo, tree); } if (WMIO_OBJECT_FLAG_CIM_CLASS & flags){ offset = dissect_wmio_encoding_classtype(tvb, offset, pinfo, tree); } decrement_dissection_depth(pinfo); return offset; } /* Decoration = DecServerName DecNamespaceName * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/0650ad93-88fa-49e9-aebc-e4462e4a7786 * Decoration = DecServerName DecNamespaceName */ static int dissect_wmio_object_decoration(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; item = proto_tree_add_item(parent_tree, hf_wmio_decoration, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_wmio_decoration); offset = dissect_wmio_encoded_string(tvb, offset, hf_wmio_decoration_server_name, pinfo, tree, false, 0); offset = dissect_wmio_encoded_string(tvb, offset, hf_wmio_decoration_namespace, pinfo, tree, false, 0); proto_item_set_len(item, offset-old_offset); return offset; } static int // NOLINTNEXTLINE(misc-no-recursion) dissect_wmio_encoding_classtype(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) { increment_dissection_depth(pinfo); // ParentClass offset = dissect_wmio_encoding_classandmethodspart(tvb, offset, pinfo, tree, hf_parentclass, ett_parentclass, true); // CurrentClass offset = dissect_wmio_encoding_classandmethodspart(tvb, offset, pinfo, tree, hf_currentclass, ett_currentclass, true); decrement_dissection_depth(pinfo); return offset; } /* ClassAndMethodsPart = ClassPart [MethodsPart] * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/35589520-cee8-4bb1-b09e-bb009d1d1b88 * ClassAndMethodsPart = ClassPart [MethodsPart] */ static int // NOLINTNEXTLINE(misc-no-recursion) dissect_wmio_encoding_classandmethodspart(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, int hf_index, int ett_id, bool methods) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; item = proto_tree_add_item(parent_tree, hf_index, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_id); offset = dissect_wmio_encoding_classpart(tvb, offset, pinfo, tree); if (methods){ offset = dissect_wmio_encoding_methodpart(tvb, offset, pinfo, tree); } proto_item_set_len(item, offset-old_offset); return offset; } /* Qualifier * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/f4c4ec0a-e38b-4591-8111-cbb03cc405c2 * Qualifier = QualifierName QualifierFlavor QualifierType QualifierValue */ static int dissect_wmio_qualifier(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, int classheapoffset) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; item = proto_tree_add_item(parent_tree, hf_wmio_qualifier, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_wmio_qualifier); dissect_wmio_encoded_string(tvb, offset, hf_wmio_qualifiername, pinfo, tree, false, classheapoffset); offset+= 4; proto_tree_add_bitmask(tree, tvb, offset, hf_wmio_flavor, ett_wmio_flavor, wmio_flavor, ENC_NA); offset+= 1; // QualifierType = CimType // CimType is a 32-bit value int32_t cimType = tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN); proto_tree_add_item(tree, hf_wmio_cimtype, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset+= 4; // QualifierValue = EncodedValue if (cimType & CIM_ARRAY_FLAG){ uint32_t array_count = tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN); offset += 4; // CimArrayType switch(cimType){ case CIM_ARRAY_SINT8: offset += array_count; break; case CIM_ARRAY_UINT8: offset += array_count; break; case CIM_ARRAY_SINT16: offset += (sizeof(int16_t) * array_count); break; case CIM_ARRAY_UINT16: offset += (sizeof(uint16_t) * array_count); break; case CIM_ARRAY_SINT32: offset += (sizeof(int32_t) * array_count); break; case CIM_ARRAY_UINT32: offset += (sizeof(uint32_t) * array_count); break; case CIM_ARRAY_SINT64: offset += (sizeof(int64_t) * array_count); break; case CIM_ARRAY_UINT64: offset += (sizeof(uint64_t) * array_count); break; case CIM_ARRAY_REAL32: offset += (sizeof(int32_t) * array_count); break; case CIM_ARRAY_REAL64: offset += (sizeof(int64_t) * array_count); break; case CIM_ARRAY_BOOLEAN: offset += (2 * array_count); break; case CIM_ARRAY_STRING: case CIM_ARRAY_DATETIME: case CIM_ARRAY_REFERENCE: // TODO break; case CIM_ARRAY_CHAR16: offset += (sizeof(int16_t) * array_count); break; case CIM_ARRAY_OBJECT: { for (uint32_t i=0; i < array_count; i++){ int32_t objEncLength = tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN); offset += objEncLength; } break; } default: break; } } else { // CimBaseType switch(cimType){ case CIM_TYPE_SINT8: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %d", proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_int8(tvb, offset)); proto_item_set_len(vitem, 1); offset+= 1; } break; case CIM_TYPE_UINT8: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %u", proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_int8(tvb, offset)); proto_item_set_len(vitem, 1); offset+= 1; } break; case CIM_TYPE_SINT16: case CIM_TYPE_CHAR16: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %d", proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_int16(tvb, offset, ENC_LITTLE_ENDIAN)); proto_item_set_len(vitem, 2); offset+= 2; } break; case CIM_TYPE_UINT16: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(tree, "%s: %u", proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_uint16(tvb, offset, ENC_LITTLE_ENDIAN)); proto_item_set_len(vitem, 2); offset+= 2; } break; case CIM_TYPE_SINT32: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %d", proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_int32(tvb, offset, ENC_LITTLE_ENDIAN)); proto_item_set_len(vitem, 4); offset+= 4; } break; case CIM_TYPE_UINT32: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %u", proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN)); proto_item_set_len(vitem, 4); offset+= 4; } break; case CIM_TYPE_SINT64: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %" PRIi64, proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_int64(tvb, offset, ENC_LITTLE_ENDIAN)); proto_item_set_len(vitem, 8); offset+= 8; } break; case CIM_TYPE_UINT64: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %" PRIu64, proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_uint64(tvb, offset, ENC_LITTLE_ENDIAN)); proto_item_set_len(vitem, 8); offset+= 8; } break; case CIM_TYPE_REAL32: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %f", proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_ieee_float(tvb, offset, ENC_LITTLE_ENDIAN)); proto_item_set_len(vitem, 4); offset+= 4; } break; case CIM_TYPE_REAL64: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %lf", proto_registrar_get_name(hf_wmio_qualifiervalue), tvb_get_ieee_double(tvb, offset, ENC_LITTLE_ENDIAN)); proto_item_set_len(vitem, 8); offset+= 8; } break; case CIM_TYPE_BOOLEAN: { proto_item *vitem = proto_tree_add_item(tree, hf_wmio_qualifiervalue, tvb, offset, -1, ENC_ASCII); proto_item_set_text(vitem, "%s: %s", proto_registrar_get_name(hf_wmio_qualifiervalue), 0 != tvb_get_uint16(tvb, offset, ENC_LITTLE_ENDIAN) ? "TRUE" : "FALSE"); proto_item_set_len(vitem, 2); offset+= 2; } break; case CIM_TYPE_STRING: case CIM_TYPE_DATETIME: case CIM_TYPE_REFERENCE: dissect_wmio_encoded_string(tvb, offset, hf_wmio_qualifiervalue, pinfo, tree, false, classheapoffset); offset+= 4; break; case CIM_TYPE_OBJECT: { int32_t objEncLength = tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN); offset += objEncLength; } break; default: break; } } proto_item_set_len(item, offset - old_offset); return offset; } /* QualifierSet * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/224c7463-01df-4e09-bd71-650ec0b8adaf * QualifierSet = EncodingLength *Qualifier */ static int dissect_wmio_encoding_qualifierset(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, int classheapoffset) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; uint32_t length; item = proto_tree_add_item(parent_tree, hf_wmio_qualifierset, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_wmio_qualifierset); proto_tree_add_item_ret_uint(tree, hf_wmio_qualifierset_length, tvb, offset, 4, ENC_LITTLE_ENDIAN, &length); offset += 4; while((uint32_t)offset < (old_offset + length)){ /* N.B. guaranteed to advance offset */ offset = dissect_wmio_qualifier(tvb, offset, pinfo, tree, classheapoffset); } proto_item_set_len(item, offset - old_offset); return old_offset+length; } /* PropertyInfo * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/563356b2-7bc7-4016-a88b-6685d3e09b59 * PropertyInfo = PropertyType DeclarationOrder ValueTableOffset ClassOfOrigin PropertyQualifierSet */ static void dissect_wmio_encoding_propertyinfo(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, int classheapoffset) { proto_item *item = NULL; proto_tree *tree = NULL; uint32_t propertyinfo_offset; int old_offset = 0; item = proto_tree_add_item(parent_tree, hf_property_info, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_property_info); proto_tree_add_item_ret_uint(tree, hf_wmio_propertyinforef, tvb, offset, 4, ENC_LITTLE_ENDIAN, &propertyinfo_offset); offset = classheapoffset + propertyinfo_offset; old_offset = offset; int32_t propType = tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN); proto_tree_add_uint(tree, hf_wmio_cimtype, tvb, offset, 4, propType & 0x3FFF); proto_tree_add_boolean(tree, hf_propertyinfo_inherited, tvb, offset, 4, propType); offset += 4; proto_tree_add_item(tree, hf_declaration_order, tvb, offset, 2, ENC_LITTLE_ENDIAN); offset += 2; proto_tree_add_item(tree, hf_propertyinfo_valuetableoffset, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset += 4; proto_tree_add_item(tree, hf_propertyinfo_classoforigin, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset += 4; offset = dissect_wmio_encoding_qualifierset(tvb, offset, pinfo, tree, classheapoffset); proto_item_set_len(item, offset - old_offset); } /* PropertyLookup * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/e401de4a-58fa-423b-89e0-4b832a99d0e9 * PropertyLookup = PropertyNameRef PropertyInfoRef */ static int dissect_wmio_encoding_propertylookup(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, int classheapoffset) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; item = proto_tree_add_item(parent_tree, hf_wmio_propertylookup, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_wmio_propertylookup); dissect_wmio_encoded_string(tvb, offset, hf_wmio_propertynameref, pinfo, tree, false, classheapoffset); offset += 4; dissect_wmio_encoding_propertyinfo(tvb, offset, pinfo, tree, classheapoffset); offset += 4; proto_item_set_len(item, offset - old_offset); return offset; } /* PropertyLookupTable * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/d4927ca8-b358-48eb-8879-a57ea4f090c3 * PropertyLookupTable = PropertyCount *PropertyLookup */ static int dissect_wmio_encoding_propertylookuptable(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, uint32_t *property_count, int classheapoffset) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; uint32_t count; item = proto_tree_add_item(parent_tree, hf_wmio_propertylookuptable, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_wmio_propertylookuptable); // PropertyCount proto_tree_add_item_ret_uint(tree, hf_wmio_propertylookuptable_count, tvb, offset, 4, ENC_LITTLE_ENDIAN, &count); offset += 4; for(uint32_t i = 0; i < count; ++i){ offset = dissect_wmio_encoding_propertylookup(tvb, offset, pinfo, tree, classheapoffset); } *property_count = count; proto_item_set_len(item, offset - old_offset); return offset; } /* ClassPart * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/06ec93f3-b4df-4f7e-b2ba-090cd435becc * ClassPart = ClassHeader DerivationList ClassQualifierSet PropertyLookupTable [NdTable ValueTable] ClassHeap */ static int dissect_wmio_encoding_classpart(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; int classheapoffset = 0; uint32_t partlength, ndLength; uint32_t property_count; item = proto_tree_add_item(parent_tree, hf_wmio_class_part, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_wmio_class_part); { /* Jump through the various structures to find the heap offset. */ uint32_t derivationListLength = tvb_get_uint32(tvb, offset + CLASS_HEADER_LENGTH, ENC_LITTLE_ENDIAN); uint32_t classQualifierSetLength = tvb_get_uint32(tvb, offset + CLASS_HEADER_LENGTH + derivationListLength, ENC_LITTLE_ENDIAN); uint32_t propertyLookupTableLength = 4 + 8 * tvb_get_uint32(tvb, offset + CLASS_HEADER_LENGTH + derivationListLength + classQualifierSetLength, ENC_LITTLE_ENDIAN); uint32_t ndTableLength = tvb_get_uint32(tvb, offset + (CLASS_HEADER_LENGTH - 4), ENC_LITTLE_ENDIAN); classheapoffset = offset /* Starting offset */ + CLASS_HEADER_LENGTH /* ClassHeader */ + derivationListLength /* DerivationList */ + classQualifierSetLength /* ClassQualifierSet */ + propertyLookupTableLength /* PropertyLookupTable */ + ndTableLength; /* NdTable */ } offset = dissect_wmio_encoding_classheader(tvb, offset, pinfo, tree, &partlength, &ndLength, classheapoffset+4); offset = dissect_wmio_encoding_derivationlist(tvb, offset, pinfo, tree); offset = dissect_wmio_encoding_qualifierset(tvb, offset, pinfo, tree,classheapoffset+4); offset = dissect_wmio_encoding_propertylookuptable(tvb, offset, pinfo, tree, &property_count, classheapoffset+4); if(ndLength > 0){ proto_tree_add_item(tree, hf_wmio_ndtable, tvb, offset, ndLength, ENC_NA); offset += ndLength; } { proto_item *heapitem = NULL; proto_tree *heaptree = NULL; heapitem = proto_tree_add_item(tree, hf_wmio_heap, tvb, offset, -1, ENC_NA); heaptree = proto_item_add_subtree(heapitem, ett_wmio_heap); int32_t heaplength = 0x7FFFFFFF & tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN); proto_tree_add_uint(heaptree, hf_wmio_heap_length, tvb, offset, 4, heaplength); proto_item_set_len(heapitem, heaplength); } proto_item_set_len(item, partlength); return old_offset + partlength; } /* ClassHeader * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/b179b579-9585-47b8-bef8-8fdca9f5a94d * ClassHeader = EncodingLength ReservedOctet ClassNameRef NdTableValueTableLength */ static int dissect_wmio_encoding_classheader(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, uint32_t *pPartlength, uint32_t *pNdLength, int classheapoffset) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; uint32_t partlength, length; item = proto_tree_add_item(parent_tree, hf_wmio_class_header, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_wmio_class_header); proto_tree_add_item_ret_uint(tree, hf_wmio_class_header_partlength, tvb, offset, 4, ENC_LITTLE_ENDIAN, &partlength); offset+= 4; *pPartlength = partlength; // ReservedOctet offset+= 1; dissect_wmio_encoded_string(tvb, offset, hf_wmio_class_header_nameref, pinfo, tree, false, classheapoffset); offset+= 4; proto_tree_add_item_ret_uint(tree, hf_wmio_class_header_ndtablevaluetablelength, tvb, offset, 4, ENC_LITTLE_ENDIAN, &length); offset+= 4; *pNdLength = length; proto_item_set_len(item, offset-old_offset); return offset; } /* DerivationList * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/3bfbcac6-318c-4b0a-ab87-13bfbc86f36f * DerivationList = EncodingLength *ClassNameEncoding */ static int dissect_wmio_encoding_derivationlist(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; uint32_t length; item = proto_tree_add_item(parent_tree, hf_wmio_class_derivation, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_wmio_class_derivation); proto_tree_add_item_ret_uint(tree, hf_wmio_class_derivation_length, tvb, offset, 4, ENC_LITTLE_ENDIAN, &length); offset+= 4; while((uint32_t)offset < (old_offset + length)) { /* Offset is guaranteed to increase here as heapoffset (last arg) is 0 */ offset = dissect_wmio_encoded_string(tvb, offset, hf_wmio_derivation_classname, pinfo, tree, true, 0); } proto_item_set_len(item, length); return offset; } /* MethodSignature * https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-wmio/a9d7c0d1-f99a-4762-b460-e881a8c7d566 * MethodSignature = HeapMethodSignatureBlockRef */ static void // NOLINTNEXTLINE(misc-no-recursion) dissect_wmio_encoding_methodsignature(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, int hfindex, int methodsheapoffset) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = 0; int32_t signatureHeapOffset = tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN); old_offset = methodsheapoffset + signatureHeapOffset; item = proto_tree_add_item(parent_tree, hfindex, tvb, old_offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_methodsignature); proto_tree_add_item(tree, hf_methodsignature_offset, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset = old_offset; proto_tree_add_item(tree, hf_wmio_objectencodinglength, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset+= 4; offset = dissect_wmio_objectblock(tvb, offset, pinfo, tree); proto_item_set_len(item, offset - old_offset); } /* MethodDescription * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/8c81e4fa-634a-469f-8434-4ef87f2f256e * MethodDescription = MethodName MethodFlags MethodPadding MethodOrigin MethodQualifiers InputSignature OutputSignature */ static int // NOLINTNEXTLINE(misc-no-recursion) dissect_wmio_encoding_methodpart_methoddescription(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, int methodsheapoffset) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; item = proto_tree_add_item(parent_tree, hf_methodspart_methoddescription, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_methodspart_methoddescription); dissect_wmio_encoded_string(tvb, offset, hf_methoddescription_methodname, pinfo, tree, false, methodsheapoffset); offset+= 4; proto_tree_add_item(tree, hf_methoddescription_methodflags, tvb, offset, 1, ENC_LITTLE_ENDIAN); offset+= 1; // MethodPadding offset+= 3; proto_tree_add_item(tree, hf_methoddescription_methodorigin, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset+= 4; proto_tree_add_item(tree, hf_methoddescription_methodqualifiers, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset+= 4; dissect_wmio_encoding_methodsignature(tvb, offset, pinfo, tree, hf_methoddescription_inputsignature, methodsheapoffset); offset+= 4; dissect_wmio_encoding_methodsignature(tvb, offset, pinfo, tree, hf_methoddescription_outputsignature, methodsheapoffset); offset+= 4; proto_item_set_len(item, offset - old_offset); return offset; } static int // NOLINTNEXTLINE(misc-no-recursion) dissect_wmio_encoding_methodpart_methods(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree, uint32_t methodscount, int methodsheapoffset) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; item = proto_tree_add_item(parent_tree, hf_methodspart_methods, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_methodspart_methods); for(uint32_t methodi = 0; methodi < methodscount; ++methodi){ offset = dissect_wmio_encoding_methodpart_methoddescription(tvb, offset, pinfo, tree, methodsheapoffset); } proto_item_set_len(item, offset - old_offset); return offset; } /* MethodsPart * https://learn.microsoft.com/de-de/openspecs/windows_protocols/ms-wmio/e00d7c6c-fa1e-4b1d-85c5-5a91a5d71299 * MethodsPart = EncodingLength MethodCount MethodCountPadding *MethodDescription MethodHeap */ static int // NOLINTNEXTLINE(misc-no-recursion) dissect_wmio_encoding_methodpart(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *parent_tree) { proto_item *item = NULL; proto_tree *tree = NULL; int old_offset = offset; uint32_t length; uint32_t methodscount; item = proto_tree_add_item(parent_tree, hf_methodspart, tvb, offset, -1, ENC_NA); tree = proto_item_add_subtree(item, ett_methodspart); proto_tree_add_item_ret_uint(tree, hf_methodspart_length, tvb, offset, 4, ENC_LITTLE_ENDIAN, &length); offset+= 4; proto_tree_add_item_ret_uint(tree, hf_methodspart_methodcount, tvb, offset, 2, ENC_LITTLE_ENDIAN, &methodscount); offset+= 2; // MethodCountPadding offset+= 2; if(methodscount > 0){ int methodsHeapOffset = offset + (methodscount * 24); methodsHeapOffset += 4; offset = dissect_wmio_encoding_methodpart_methods(tvb, offset, pinfo, tree, methodscount, methodsHeapOffset); } { proto_item *heapitem = NULL; proto_tree *heaptree = NULL; heapitem = proto_tree_add_item(tree, hf_wmio_heap, tvb, offset, -1, ENC_NA); heaptree = proto_item_add_subtree(heapitem, ett_wmio_heap); int32_t heaplength = 0x7FFFFFFF & tvb_get_uint32(tvb, offset, ENC_LITTLE_ENDIAN); proto_tree_add_uint(heaptree, hf_wmio_heap_length, tvb, offset, 4, heaplength); proto_item_set_len(heapitem, heaplength); } proto_item_set_len(item, length); return old_offset+length; } static int dissect_wmio(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, dcerpc_info *di _U_, uint8_t *drep _U_, int size) { proto_item *sub_item; proto_tree *sub_tree; int old_offset = offset; uint32_t signature; sub_item = proto_tree_add_item(tree, hf_wmio, tvb, offset, size, ENC_NA); sub_tree = proto_item_add_subtree(sub_item, ett_wmio); proto_tree_add_item_ret_uint(sub_tree, hf_wmio_signature, tvb, offset, 4, ENC_LITTLE_ENDIAN, &signature); offset+= 4; if (signature != wmio_signature){ return old_offset + size; } proto_tree_add_item(sub_tree, hf_wmio_objectencodinglength, tvb, offset, 4, ENC_LITTLE_ENDIAN); offset+= 4; dissect_wmio_objectblock(tvb, offset, pinfo, sub_tree); return old_offset + size; } void register_dcom_wmio (void) { dcom_register_routine(dissect_wmio, &iid_WMIO); } void proto_register_WMIO (void) { proto_WMIO = proto_register_protocol ("WMIO", "WMIO", "WMIO"); proto_register_field_array (proto_WMIO, hf, array_length (hf)); proto_register_subtree_array (ett, array_length (ett)); }