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wireshark/epan/dissectors/packet-tnef.c

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/* packet-tnef.c
* Routines for Transport-Neutral Encapsulation Format (TNEF) packet disassembly
*
* Copyright (c) 2007 by Graeme Lunt
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1999 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#include <wiretap/tnef.h>
#include "packet-dcerpc.h"
#include "packet-dcerpc-nspi.h"
#include "packet-ber.h"
#define PNAME "Transport-Neutral Encapsulation Format"
#define PSNAME "TNEF"
#define PFNAME "tnef"
#define ATP_TRIPLES (0x0000)
#define ATP_STRING (0x0001)
#define ATP_TEXT (0x0002)
#define ATP_DATE (0x0003)
#define ATP_SHORT (0x0004)
#define ATP_LONG (0x0005)
#define ATP_BYTE (0x0006)
#define ATP_WORD (0x0007)
#define ATP_DWORD (0x0008)
#define ATP_MAX (0x0009)
#define ATT_OWNER (0x00060000) /* handled */
#define ATT_SENT_FOR (0x00060001) /* handled */
#define ATT_DELEGATE (0x00060002)
#define ATT_DATE_START (0x00030006) /* handled */
#define ATT_DATE_END (0x00030007) /* handled */
#define ATT_AID_OWNER (0x00040008)
#define ATT_REQUEST_RES (0x00040009)
#define ATT_FROM (0x00008000)
#define ATT_SUBJECT (0x00018004)
#define ATT_DATE_SENT (0x00038005) /* handled */
#define ATT_DATE_RECD (0x00038006) /* handled */
#define ATT_MESSAGE_STATUS (0x00068007)
#define ATT_MESSAGE_CLASS (0x00078008) /* handled */
#define ATT_MESSAGE_ID (0x00018009)
#define ATT_PARENT_ID (0x0001800A) /* handled */
#define ATT_CONVERSATION_ID (0x0001800B) /* handled */
#define ATT_BODY (0x0002800C)
#define ATT_PRIORITY (0x0004800D) /* handled */
#define ATT_ATTACH_DATA (0x0006800F)
#define ATT_ATTACH_TITLE (0x00018010) /* handled */
#define ATT_ATTACH_META_FILE (0x00068011)
#define ATT_ATTACH_CREATE_DATE (0x00038012) /* handled */
#define ATT_ATTACH_MODIFY_DATE (0x00038013) /* handled */
#define ATT_DATE_MODIFIED (0x00038020) /* handled */
#define ATT_ATTACH_TRANSPORT_FILENAME (0x00069001)
#define ATT_ATTACH_REND_DATA (0x00069002)
#define ATT_MAPI_PROPS (0x00069003) /* handled */
#define ATT_RECIP_TABLE (0x00069004)
#define ATT_ATTACHMENT (0x00069005)
#define ATT_TNEF_VERSION (0x00089006) /* handled */
#define ATT_OEM_CODEPAGE (0x00069007) /* handled */
#define ATT_ORIGINAL_MESSAGE_CLASS (0x00079008) /* handled */
void proto_register_tnef(void);
void proto_reg_handoff_tnef(void);
static int proto_tnef = -1;
static int hf_tnef_signature = -1;
static int hf_tnef_key = -1;
static int hf_tnef_attribute = -1;
static int hf_tnef_attribute_lvl = -1;
static int hf_tnef_attribute_tag = -1;
static int hf_tnef_attribute_tag_type = -1;
static int hf_tnef_attribute_tag_id = -1;
static int hf_tnef_attribute_length = -1;
static int hf_tnef_attribute_value = -1;
static int hf_tnef_attribute_string = -1;
static int hf_tnef_attribute_date = -1;
static int hf_tnef_attribute_display_name = -1;
static int hf_tnef_attribute_email_address = -1;
static int hf_tnef_attribute_checksum = -1;
static int hf_tnef_mapi_props = -1;
static int hf_tnef_oem_codepage = -1;
static int hf_tnef_version = -1;
static int hf_tnef_message_class = -1;
static int hf_tnef_original_message_class = -1;
static int hf_tnef_priority = -1;
static int hf_tnef_mapi_props_count = -1;
static int hf_tnef_property = -1;
static int hf_tnef_property_tag = -1;
static int hf_tnef_property_tag_type = -1;
static int hf_tnef_property_tag_id = -1;
static int hf_tnef_property_tag_set = -1;
static int hf_tnef_property_tag_kind = -1;
static int hf_tnef_property_tag_name_id = -1;
static int hf_tnef_property_tag_name_length = -1;
static int hf_tnef_property_tag_name_string = -1;
static int hf_tnef_property_padding = -1;
static int hf_tnef_padding = -1;
static int hf_tnef_values_count = -1;
static int hf_tnef_value_length = -1;
static int hf_tnef_attribute_date_year = -1;
static int hf_tnef_attribute_date_month = -1;
static int hf_tnef_attribute_date_day = -1;
static int hf_tnef_attribute_date_hour = -1;
static int hf_tnef_attribute_date_minute = -1;
static int hf_tnef_attribute_date_second = -1;
static int hf_tnef_attribute_date_day_of_week = -1;
static int hf_tnef_PropValue_i = -1;
static int hf_tnef_PropValue_l = -1;
static int hf_tnef_PropValue_b = -1;
static int hf_tnef_PropValue_lpszA = -1;
static int hf_tnef_PropValue_lpszW = -1;
static int hf_tnef_PropValue_lpguid = -1;
static int hf_tnef_PropValue_bin = -1;
static int hf_tnef_PropValue_ft = -1;
static int hf_tnef_PropValue_err = -1;
static int hf_tnef_PropValue_MVi = -1;
static int hf_tnef_PropValue_MVl = -1;
static int hf_tnef_PropValue_MVszA = -1;
static int hf_tnef_PropValue_MVbin = -1;
static int hf_tnef_PropValue_MVguid = -1;
static int hf_tnef_PropValue_MVszW = -1;
static int hf_tnef_PropValue_MVft = -1;
static int hf_tnef_PropValue_null = -1;
static int hf_tnef_PropValue_object = -1;
static int ett_tnef = -1;
static int ett_tnef_attribute = -1;
static int ett_tnef_attribute_tag = -1;
static int ett_tnef_mapi_props = -1;
static int ett_tnef_property = -1;
static int ett_tnef_property_tag = -1;
static int ett_tnef_counted_items = -1;
static int ett_tnef_attribute_date = -1;
static int ett_tnef_attribute_address = -1;
static expert_field ei_tnef_expect_single_item = EI_INIT;
static expert_field ei_tnef_incorrect_signature = EI_INIT;
static dissector_handle_t tnef_handle;
static const value_string tnef_Lvl_vals[] = {
{ 1, "LVL-MESSAGE" },
{ 2, "LVL-ATTACHMENT" },
{ 0, NULL }
};
static const value_string tnef_Priority_vals[] = {
{ 1, "Low" },
{ 2, "High" },
{ 3, "Normal" },
{ 0, NULL }
};
static const value_string tnef_Types_vals[] = {
{ ATP_TRIPLES, "Triples" },
{ ATP_STRING, "String"},
{ ATP_TEXT, "Text" },
{ ATP_DATE, "Date"},
{ ATP_SHORT, "Short"},
{ ATP_LONG, "Long"},
{ ATP_BYTE, "Byte"},
{ ATP_WORD, "Word"},
{ ATP_DWORD, "DWord"},
{ ATP_MAX, "Max"},
{ 0, NULL }
};
static const value_string weekday_vals[] = {
{0, "Sunday"},
{1, "Monday"},
{2, "Tuesday"},
{3, "Wednesday"},
{4, "Thursday"},
{5, "Friday"},
{6, "Saturday"},
{0, NULL}
};
static const value_string tnef_Attribute_vals[] = {
{ ATT_OWNER, "ATT_OWNER" },
{ ATT_SENT_FOR, "ATT_SENT_FOR" },
{ ATT_DELEGATE, "ATT_DELEGATE" },
{ ATT_OWNER, "ATT_OWNER" },
{ ATT_DATE_START, "ATT_DATE_START" },
{ ATT_DATE_END, "ATT_DATE_END" },
{ ATT_AID_OWNER, "ATT_AID_OWNER" },
{ ATT_REQUEST_RES, "ATT_REQUEST_RES" },
{ ATT_FROM, "ATT_FROM" },
{ ATT_SUBJECT, "ATT_SUBJECT" },
{ ATT_DATE_SENT, "ATT_DATE_SENT" },
{ ATT_DATE_RECD, "ATT_DATE_RECD" },
{ ATT_MESSAGE_STATUS, "ATT_MESSAGE_STATUS" },
{ ATT_MESSAGE_CLASS, "ATT_MESSAGE_CLASS" },
{ ATT_MESSAGE_ID, "ATT_MESSAGE_ID" },
{ ATT_PARENT_ID, "ATT_PARENT_ID" },
{ ATT_CONVERSATION_ID, "ATT_CONVERSATION_ID" },
{ ATT_BODY, "ATT_BODY" },
{ ATT_PRIORITY, "ATT_PRIORITY" },
{ ATT_ATTACH_DATA, "ATT_ATTACH_DATA" },
{ ATT_ATTACH_TITLE, "ATT_ATTACH_TITLE" },
{ ATT_ATTACH_META_FILE, "ATT_ATTACH_META_FILE" },
{ ATT_ATTACH_CREATE_DATE, "ATT_ATTACH_CREATE_DATE" },
{ ATT_ATTACH_MODIFY_DATE, "ATT_ATTACH_MODIFY_DATE" },
{ ATT_DATE_MODIFIED, "ATT_DATE_MODIFIED" },
{ ATT_ATTACH_TRANSPORT_FILENAME, "ATT_ATTACH_TRANSPORT_FILENAME" },
{ ATT_ATTACH_REND_DATA, "ATT_ATTACH_REND_DATA" },
{ ATT_MAPI_PROPS, "ATT_MAPI_PROPS" },
{ ATT_RECIP_TABLE, "ATT_RECIP_TABLE" },
{ ATT_ATTACHMENT, "ATT_ATTACHMENT" },
{ ATT_TNEF_VERSION, "ATT_TNEF_VERSION" },
{ ATT_OEM_CODEPAGE, "ATT_OEM_CODEPAGE" },
{ ATT_ORIGINAL_MESSAGE_CLASS, "ATT_ORIGINAL_MESSAGE_CLASS" },
{ 0, NULL }
};
static gint dissect_counted_values(tvbuff_t *tvb, gint offset, int hf_id, packet_info *pinfo, proto_tree *tree, gboolean single, guint encoding)
{
proto_item *item;
guint32 length, count, i;
count = tvb_get_letohl(tvb, offset);
proto_tree_add_item(tree, hf_tnef_values_count, tvb, offset, 4, ENC_LITTLE_ENDIAN);
if(count > 1) {
if(single) {
item = proto_tree_add_expert_format(tree, pinfo, &ei_tnef_expect_single_item, tvb, offset, 4,
"Expecting a single item but found %d", count);
tree = proto_item_add_subtree(item, ett_tnef_counted_items);
}
}
offset += 4;
for(i = 0; i < count; i++) {
length = tvb_get_letohl(tvb, offset);
proto_tree_add_item(tree, hf_tnef_value_length, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item(tree, hf_id, tvb, offset, length, encoding);
offset += length;
/* XXX: may be padding ? */
}
return offset;
}
static gint dissect_counted_address(tvbuff_t *tvb, gint offset, packet_info *pinfo _U_, proto_tree *tree)
{
guint16 length;
length = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_tnef_value_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tree, hf_tnef_attribute_display_name, tvb, offset, length, ENC_ASCII);
offset += length;
length = tvb_get_letohs(tvb, offset);
proto_tree_add_item(tree, hf_tnef_value_length, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tree, hf_tnef_attribute_email_address, tvb, offset, length, ENC_ASCII);
offset += length;
return offset;
}
static void dissect_DTR(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree)
{
gint offset;
offset = 0;
proto_tree_add_item(tree, hf_tnef_attribute_date_year, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset +=2;
proto_tree_add_item(tree, hf_tnef_attribute_date_month, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset +=2;
proto_tree_add_item(tree, hf_tnef_attribute_date_day, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset +=2;
proto_tree_add_item(tree, hf_tnef_attribute_date_hour, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset +=2;
proto_tree_add_item(tree, hf_tnef_attribute_date_minute, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset +=2;
proto_tree_add_item(tree, hf_tnef_attribute_date_second, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset +=2;
proto_tree_add_item(tree, hf_tnef_attribute_date_day_of_week, tvb, offset, 2, ENC_LITTLE_ENDIAN);
/*offset +=2;*/
}
static void dissect_mapiprops(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint oem_encoding)
{
proto_item *item, *prop_item;
proto_tree *prop_tree, *tag_tree;
guint32 /*count,*/ tag, tag_kind, tag_length;
guint16 padding;
gint offset, start_offset;
guint8 drep[] = {0x10 /* LE */, /* DCE_RPC_DREP_FP_IEEE */ 0 };
static dcerpc_info di;
static dcerpc_call_value call_data;
offset = 0;
di.conformant_run = 0;
/* we need di->call_data->flags.NDR64 == 0 */
di.call_data = &call_data;
di.dcerpc_procedure_name = "";
/* first the count */
proto_tree_add_item(tree, hf_tnef_mapi_props_count, tvb, offset, 4, ENC_LITTLE_ENDIAN);
/*count = tvb_get_letohl(tvb, offset);*/
offset += 4;
while(tvb_reported_length_remaining(tvb, offset) > 0 ) {
start_offset = offset;
/* get the property tag */
prop_item = proto_tree_add_item(tree, hf_tnef_property, tvb, offset, -1, ENC_NA);
prop_tree = proto_item_add_subtree(prop_item, ett_tnef_property);
item = proto_tree_add_item(prop_tree, hf_tnef_property_tag, tvb, offset, 4, ENC_LITTLE_ENDIAN);
tag_tree = proto_item_add_subtree(item, ett_tnef_property_tag);
/* add a nice name to the property */
tag = tvb_get_letohl(tvb, offset);
proto_item_append_text(prop_item, " %s", val_to_str(tag, nspi_MAPITAGS_vals, "Unknown tag (0x%08lx)"));
proto_tree_add_item(tag_tree, hf_tnef_property_tag_type, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tag_tree, hf_tnef_property_tag_id, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
if(tag & 0x80000000) {
const guint8* name_string = NULL;
/* it is a named property */
proto_tree_add_item(tag_tree, hf_tnef_property_tag_set, tvb, offset, 16, ENC_LITTLE_ENDIAN);
offset += 16;
tag_kind = tvb_get_letohl(tvb, offset);
proto_tree_add_item(tag_tree, hf_tnef_property_tag_kind, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
if(tag_kind == 0) {
proto_tree_add_item(tag_tree, hf_tnef_property_tag_name_id, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
} else {
tag_length = tvb_get_letohl(tvb, offset);
proto_tree_add_item(tag_tree, hf_tnef_property_tag_name_length, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
proto_tree_add_item_ret_string(tag_tree, hf_tnef_property_tag_name_string, tvb, offset, tag_length,
ENC_UTF_16|ENC_LITTLE_ENDIAN, pinfo->pool, &name_string);
offset += tag_length;
if((padding = (4 - tag_length % 4)) != 4) {
proto_tree_add_item(tag_tree, hf_tnef_property_padding, tvb, offset, padding, ENC_NA);
offset += padding;
}
}
proto_item_append_text(prop_item, " [Named Property");
if (name_string)
proto_item_append_text(prop_item, ": %s", name_string);
proto_item_append_text(prop_item, "]");
}
switch(tag) {
/* handle any specific tags here */
default:
/* otherwise just use the type */
switch(tag & 0x0000ffff) {
case PT_I2:
offset = PIDL_dissect_uint16(tvb, offset, pinfo, prop_tree, &di, drep, hf_tnef_PropValue_i, 0);
break;
case PT_LONG:
offset = PIDL_dissect_uint32(tvb, offset, pinfo, prop_tree, &di, drep, hf_tnef_PropValue_l, 0);
break;
case PT_BOOLEAN:
offset = PIDL_dissect_uint16(tvb, offset, pinfo, prop_tree, &di, drep, hf_tnef_PropValue_b, 0);
break;
case PT_STRING8:
offset = dissect_counted_values(tvb, offset, hf_tnef_PropValue_lpszA, pinfo, prop_tree, TRUE, oem_encoding);
break;
case PT_BINARY:
offset = dissect_counted_values(tvb, offset, hf_tnef_PropValue_bin, pinfo, prop_tree, TRUE, ENC_NA);
break;
case PT_UNICODE:
offset = dissect_counted_values (tvb, offset, hf_tnef_PropValue_lpszW, pinfo, prop_tree, TRUE, ENC_UTF_16|ENC_LITTLE_ENDIAN);
break;
case PT_CLSID:
offset = nspi_dissect_struct_MAPIUID(tvb, offset, pinfo, prop_tree, &di, drep, hf_tnef_PropValue_lpguid, 0);
break;
case PT_SYSTIME:
offset = nspi_dissect_struct_FILETIME(tvb,offset,pinfo,prop_tree,&di,drep,hf_tnef_PropValue_ft,0);
break;
case PT_ERROR:
offset = nspi_dissect_enum_MAPISTATUS(tvb, offset, pinfo, prop_tree, &di, drep, hf_tnef_PropValue_err, 0);
break;
case PT_MV_I2:
offset = nspi_dissect_struct_SShortArray(tvb,offset,pinfo,prop_tree,&di,drep,hf_tnef_PropValue_MVi,0);
break;
case PT_MV_LONG:
offset = nspi_dissect_struct_MV_LONG_STRUCT(tvb,offset,pinfo,prop_tree,&di,drep,hf_tnef_PropValue_MVl,0);
break;
case PT_MV_STRING8:
offset = nspi_dissect_struct_SLPSTRArray(tvb,offset,pinfo,prop_tree,&di,drep,hf_tnef_PropValue_MVszA,0);
break;
case PT_MV_BINARY:
offset = nspi_dissect_struct_SBinaryArray(tvb,offset,pinfo,prop_tree,&di,drep,hf_tnef_PropValue_MVbin,0);
break;
case PT_MV_CLSID:
offset = nspi_dissect_struct_SGuidArray(tvb,offset,pinfo,prop_tree,&di,drep,hf_tnef_PropValue_MVguid,0);
break;
case PT_MV_UNICODE:
offset = nspi_dissect_struct_MV_UNICODE_STRUCT(tvb,offset,pinfo,prop_tree,&di,drep,hf_tnef_PropValue_MVszW,0);
break;
case PT_MV_SYSTIME:
offset = nspi_dissect_struct_SDateTimeArray(tvb,offset,pinfo,prop_tree,&di,drep,hf_tnef_PropValue_MVft,0);
break;
case PT_NULL:
offset = PIDL_dissect_uint32(tvb, offset, pinfo, prop_tree, &di, drep, hf_tnef_PropValue_null, 0);
break;
case PT_OBJECT:
offset = PIDL_dissect_uint32(tvb, offset, pinfo, prop_tree, &di, drep, hf_tnef_PropValue_object, 0);
break;
}
}
/* we may need to pad to a 4-byte boundary */
if((padding = (4 - (offset - start_offset) % 4)) != 4) {
/* we need to pad */
proto_tree_add_item(prop_tree, hf_tnef_property_padding, tvb, offset, padding, ENC_NA);
offset += padding;
}
proto_item_set_len(prop_item, offset - start_offset);
}
}
static int dissect_tnef(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
proto_item *attr_item, *item;
proto_tree *attr_tree, *tag_tree, *props_tree, *addr_tree, *date_tree;
guint32 tag, length, signature;
gint offset, start_offset;
tvbuff_t *next_tvb;
guint64 oem_code_page;
guint oem_encoding = ENC_ASCII|ENC_NA;
if(tree){
item = proto_tree_add_item(tree, proto_tnef, tvb, 0, -1, ENC_NA);
tree = proto_item_add_subtree(item, ett_tnef);
}
offset = 0;
/* first the signature */
signature = tvb_get_letohl(tvb, offset);
item = proto_tree_add_item(tree, hf_tnef_signature, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
/* check the signature */
if(signature != TNEF_SIGNATURE) {
expert_add_info_format(pinfo, item, &ei_tnef_incorrect_signature,
" [Incorrect, should be 0x%x. No further dissection possible. Check any Content-Transfer-Encoding has been removed.]", TNEF_SIGNATURE);
return offset;
} else {
proto_item_append_text(item, " [Correct]");
}
proto_tree_add_item(tree, hf_tnef_key, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
while(tvb_reported_length_remaining(tvb, offset) > 9 ) { /* there must be at least a level (1), tag (4) and length (4) to be valid */
start_offset = offset;
attr_item = proto_tree_add_item(tree, hf_tnef_attribute, tvb, offset, -1, ENC_NA);
attr_tree = proto_item_add_subtree(attr_item, ett_tnef_attribute);
proto_tree_add_item(attr_tree, hf_tnef_attribute_lvl, tvb, offset, 1, ENC_LITTLE_ENDIAN);
offset += 1;
item = proto_tree_add_item(attr_tree, hf_tnef_attribute_tag, tvb, offset, 4, ENC_LITTLE_ENDIAN);
tag_tree = proto_item_add_subtree(item, ett_tnef_attribute_tag);
/* add a nice name to the property */
tag = tvb_get_letohl(tvb, offset);
proto_item_append_text(attr_item, " %s", val_to_str(tag, tnef_Attribute_vals, "Unknown tag (0x%08lx)"));
proto_tree_add_item(tag_tree, hf_tnef_attribute_tag_id, tvb, offset, 2, ENC_LITTLE_ENDIAN);
offset += 2;
proto_tree_add_item(tag_tree, hf_tnef_attribute_tag_type, tvb, offset, 2, ENC_LITTLE_ENDIAN);
/* remember the type for the value dissection */
offset += 2;
length = tvb_get_letohl(tvb, offset);
proto_tree_add_item(attr_tree, hf_tnef_attribute_length, tvb, offset, 4, ENC_LITTLE_ENDIAN);
offset += 4;
switch(tag) {
case ATT_OEM_CODEPAGE:
proto_tree_add_item_ret_uint64(attr_tree, hf_tnef_oem_codepage, tvb, offset, length, ENC_LITTLE_ENDIAN, &oem_code_page);
switch (oem_code_page) {
case 1250:
oem_encoding = ENC_WINDOWS_1250|ENC_NA;
break;
case 1251:
oem_encoding = ENC_WINDOWS_1251|ENC_NA;
break;
case 1252:
oem_encoding = ENC_WINDOWS_1252|ENC_NA;
break;
default:
oem_encoding = ENC_ASCII|ENC_NA; /* XXX - support more code pages */
break;
}
break;
case ATT_TNEF_VERSION:
proto_tree_add_item(attr_tree, hf_tnef_version, tvb, offset, length, ENC_LITTLE_ENDIAN);
break;
case ATT_MESSAGE_CLASS:
proto_tree_add_item(attr_tree, hf_tnef_message_class, tvb, offset, length, ENC_ASCII);
break;
case ATT_ORIGINAL_MESSAGE_CLASS:
proto_tree_add_item(attr_tree, hf_tnef_original_message_class, tvb, offset, length, ENC_ASCII);
break;
case ATT_MAPI_PROPS:
item = proto_tree_add_item(attr_tree, hf_tnef_mapi_props, tvb, offset, length, ENC_NA);
props_tree = proto_item_add_subtree(item, ett_tnef_mapi_props);
next_tvb = tvb_new_subset_length(tvb, offset, length);
dissect_mapiprops(next_tvb, pinfo, props_tree, oem_encoding);
break;
case ATT_OWNER:
case ATT_SENT_FOR:
addr_tree = proto_item_add_subtree(item, ett_tnef_attribute_address);
(void)dissect_counted_address(tvb, offset, pinfo, addr_tree);
break;
case ATT_PRIORITY:
proto_tree_add_item(attr_tree, hf_tnef_priority, tvb, offset, length, ENC_LITTLE_ENDIAN);
break;
default:
/* just do it on the type */
switch((tag >> 16) & 0xffff) {
case ATP_DATE:
item = proto_tree_add_item(attr_tree, hf_tnef_attribute_date, tvb, offset, length, ENC_NA);
date_tree = proto_item_add_subtree(item, ett_tnef_attribute_date);
next_tvb = tvb_new_subset_length(tvb, offset, length);
dissect_DTR(next_tvb, pinfo, date_tree);
break;
case ATP_STRING:
{
const guint8* atp;
proto_tree_add_item_ret_string(attr_tree, hf_tnef_attribute_string, tvb, offset, length, oem_encoding, pinfo->pool, &atp);
proto_item_append_text(attr_item, " %s", atp);
}
break;
default:
proto_tree_add_item(attr_tree, hf_tnef_attribute_value, tvb, offset, length, ENC_NA);
break;
}
}
/* check for overflow */
if (offset + length > (guint32)offset) {
offset += length;
}
proto_tree_add_checksum(attr_tree, tvb, offset, hf_tnef_attribute_checksum, -1, NULL, pinfo, 0, ENC_LITTLE_ENDIAN, PROTO_CHECKSUM_NO_FLAGS);
offset += 2;
proto_item_set_len(attr_item, offset - start_offset);
}
/* there may be some padding */
if(tvb_reported_length_remaining(tvb, offset)) /* XXX: Not sure if they is really padding or not */
proto_tree_add_item(tree, hf_tnef_padding, tvb, offset, tvb_reported_length_remaining(tvb, offset), ENC_NA);
return tvb_captured_length(tvb);
}
static int dissect_tnef_file(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
col_set_str(pinfo->cinfo, COL_PROTOCOL, PSNAME);
col_set_str(pinfo->cinfo, COL_DEF_SRC, PSNAME " encoded file");
col_append_str(pinfo->cinfo, COL_INFO, PNAME);
dissect_tnef(tvb, pinfo, tree, NULL);
return tvb_captured_length(tvb);
}
/* Register all the bits needed by the filtering engine */
void
proto_register_tnef(void)
{
static hf_register_info hf[] = {
{ &hf_tnef_signature,
{ "Signature", "tnef.signature", FT_UINT32, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_key,
{ "Key", "tnef.key", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute,
{ "Attribute", "tnef.attribute", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_lvl,
{ "Type", "tnef.attribute.lvl", FT_UINT8, BASE_DEC, VALS(tnef_Lvl_vals), 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_tag,
{ "Tag", "tnef.attribute.tag", FT_UINT32, BASE_HEX, VALS(tnef_Attribute_vals), 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_tag_type,
{ "Type", "tnef.attribute.tag.type", FT_UINT16, BASE_HEX, VALS(tnef_Types_vals), 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_tag_id,
{ "Tag", "tnef.attribute.tag.id", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_length,
{ "Length", "tnef.attribute.length", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_value,
{ "Value", "tnef.attribute.value", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_string,
{ "String", "tnef.attribute.string", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_date,
{ "Date", "tnef.attribute.date", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_display_name,
{ "Display Name", "tnef.attribute.display_name", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_email_address,
{ "Email Address", "tnef.attribute.email_address", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_attribute_date_year,
{ "Year", "tnef.attribute.date.year", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_attribute_date_month,
{ "Month", "tnef.attribute.date.month", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_attribute_date_day,
{ "Day", "tnef.attribute.date.day", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_attribute_date_hour,
{ "Hour", "tnef.attribute.date.hour", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_attribute_date_minute,
{ "Minute", "tnef.attribute.date.minute", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_attribute_date_second,
{ "Second", "tnef.attribute.date.second", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_attribute_date_day_of_week,
{ "Day Of Week", "tnef.attribute.date.day_of_week", FT_UINT16, BASE_DEC, VALS(weekday_vals), 0, NULL, HFILL }},
{ &hf_tnef_attribute_checksum,
{ "Checksum", "tnef.attribute.checksum", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_mapi_props,
{ "MAPI Properties", "tnef.mapi_props", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_version,
{ "Version", "tnef.version", FT_UINT32, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_oem_codepage,
{ "OEM Codepage", "tnef.oem_codepage", FT_UINT64, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_message_class,
{ "Message Class", "tnef.message_class", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_original_message_class,
{ "Original Message Class", "tnef.message_class.original", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_priority,
{ "Priority", "tnef.priority", FT_UINT16, BASE_DEC, VALS(tnef_Priority_vals), 0x0,
NULL, HFILL }},
{ &hf_tnef_mapi_props_count,
{ "Count", "tnef.mapi_props.count", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_property,
{ "Property", "tnef.property", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_property_tag,
{ "Tag", "tnef.property.tag", FT_UINT32, BASE_HEX, VALS(nspi_MAPITAGS_vals), 0x0,
NULL, HFILL }},
{ &hf_tnef_property_tag_type,
{ "Type", "tnef.property.tag.type", FT_UINT16, BASE_HEX, VALS(nspi_property_types_vals), 0x0,
NULL, HFILL }},
{ &hf_tnef_property_tag_id,
{ "Tag", "tnef.property.tag.id", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_property_tag_set,
{ "Set", "tnef.attribute.tag.set", FT_GUID, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_property_tag_kind,
{ "Kind", "tnef.attribute.tag.kind", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_property_tag_name_id,
{ "Name", "tnef.attribute.tag.name.id", FT_UINT32, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_property_tag_name_length,
{ "Length", "tnef.attribute.tag.name.length", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_property_tag_name_string,
{ "Name", "tnef.attribute.tag.name.string", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_property_padding,
{ "Padding", "tnef.property.padding", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_padding,
{ "Padding", "tnef.padding", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_values_count,
{ "Count", "tnef.values.count", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_value_length,
{ "Length", "tnef.value.length", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_tnef_PropValue_i,
{ "I", "tnef.PropValue.i", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_l,
{ "L", "tnef.PropValue.l", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_b,
{ "B", "tnef.PropValue.b", FT_UINT16, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_lpszA,
{ "Lpsza", "tnef.PropValue.lpszA", FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_lpszW,
{ "Lpszw", "tnef.PropValue.lpszW", FT_STRING, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_lpguid,
{ "Lpguid", "tnef.PropValue.lpguid", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_bin,
{ "Bin", "tnef.PropValue.bin", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_ft,
{ "Ft", "tnef.PropValue.ft", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_err,
{ "Err", "tnef.PropValue.err", FT_UINT32, BASE_DEC, VALS(nspi_MAPISTATUS_vals), 0, NULL, HFILL }},
{ &hf_tnef_PropValue_MVi,
{ "Mvi", "tnef.PropValue.MVi", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_MVl,
{ "Mvl", "tnef.PropValue.MVl", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_MVszA,
{ "Mvsza", "tnef.PropValue.MVszA", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_MVbin,
{ "Mvbin", "tnef.PropValue.MVbin", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_MVguid,
{ "Mvguid", "tnef.PropValue.MVguid", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_MVszW,
{ "Mvszw", "tnef.PropValue.MVszW", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_MVft,
{ "Mvft", "tnef.PropValue.MVft", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_null,
{ "Null", "tnef.PropValue.null", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL }},
{ &hf_tnef_PropValue_object,
{ "Object", "tnef.PropValue.object", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_tnef,
&ett_tnef_attribute,
&ett_tnef_attribute_tag,
&ett_tnef_mapi_props,
&ett_tnef_property,
&ett_tnef_property_tag,
&ett_tnef_counted_items,
&ett_tnef_attribute_date,
&ett_tnef_attribute_address,
};
static ei_register_info ei[] = {
{ &ei_tnef_expect_single_item, { "tnef.expect_single_item", PI_MALFORMED, PI_ERROR, "Expected single item", EXPFILL }},
{ &ei_tnef_incorrect_signature, { "tnef.signature.incorrect", PI_MALFORMED, PI_WARN, "Incorrect signature", EXPFILL }},
};
expert_module_t* expert_tnef;
proto_tnef = proto_register_protocol(PNAME, PSNAME, PFNAME);
proto_register_field_array(proto_tnef, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_tnef = expert_register_protocol(proto_tnef);
expert_register_field_array(expert_tnef, ei, array_length(ei));
/* Allow dissector to find be found by name. */
tnef_handle = register_dissector(PFNAME, dissect_tnef, proto_tnef);
}
/* The registration hand-off routine */
void
proto_reg_handoff_tnef(void)
{
dissector_handle_t tnef_file_handle;
tnef_file_handle = create_dissector_handle(dissect_tnef_file, proto_tnef);
dissector_add_string("media_type", "application/ms-tnef", tnef_handle);
/* X.400 file transfer bodypart */
register_ber_oid_dissector_handle("1.2.840.113556.3.10.1", tnef_handle, proto_tnef, "id-et-tnef");
dissector_add_uint("wtap_encap", WTAP_ENCAP_TNEF, tnef_file_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local Variables:
* c-basic-offset: 2
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* ex: set shiftwidth=2 tabstop=8 expandtab:
* :indentSize=2:tabSize=8:noTabs=true:
*/
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