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-- Define the fields to be captured
local fields = {
quic = Field.new("tls.quic.parameter.type"), -- QUIC transport parameter type field
tls = Field.new("tls.handshake.extension.type") -- TLS extension type field
}
local tps_values = {
tp_max_idle_timeout = Field.new("tls.quic.parameter.max_idle_timeout"), -- 0x01
tp_max_udp_payload_size = Field.new("tls.quic.parameter.max_udp_payload_size"), -- 0x03
tp_initial_max_data = Field.new("tls.quic.parameter.initial_max_data"), -- 0x04
tp_initial_max_stream_data_bidi_local = Field.new("tls.quic.parameter.initial_max_stream_data_bidi_local"), -- 0x05
tp_initial_max_stream_data_bidi_remote = Field.new("tls.quic.parameter.initial_max_stream_data_bidi_remote"), -- 0x06
tp_initial_max_stream_data_uni = Field.new("tls.quic.parameter.initial_max_stream_data_uni"), -- 0x07
tp_initial_max_streams_bidi = Field.new("tls.quic.parameter.initial_max_streams_bidi"), -- 0x08
tp_initial_max_streams_uni = Field.new("tls.quic.parameter.initial_max_streams_uni"), -- 0x09
tp_active_connection_id_limit = Field.new("tls.quic.parameter.active_connection_id_limit"), -- 0x0e
tp_max_datagram_frame_size = Field.new("tls.quic.parameter.max_datagram_frame_size"), -- 0x20
}
-- Define the lookup tables for TLS extensions and transport parameters
local lookup_tls_extensions = {
["43"] = true, -- supported_versions
["51"] = true -- key_share
}
local lookup_transport_parameters = {
-- ["0x0"] = true, -- original_destination_connection_id
-- ["0x1"] = true, -- max_idle_timeout
-- ["0x2"] = true, -- stateless_reset_token
["0x3"] = true, -- max_udp_payload_size
["0x4"] = true, -- initial_max_data
-- ["0x5"] = true, -- initial_max_stream_data_bidi_local
["0x6"] = true, -- initial_max_stream_data_bidi_remote
["0x7"] = true, -- initial_max_stream_data_uni
["0x8"] = true, -- initial_max_streams_bidi
-- ["0x9"] = true, -- initial_max_streams_uni
["0xa"] = true, -- ack_delay_exponent
["0xb"] = true, -- max_ack_delay
["0xc"] = true, -- disable_active_migration
-- ["0xd"] = true, -- preferred_address
-- ["0xe"] = true, -- active_connection_id_limit
["0xf"] = true, -- initial_source_connection_id
-- ["0x10"] = true, -- retry_source_connection_id
}
-- Micro-db for known QUIC fingerprints
local known_fingerprints = {
["43_51-0x6_0x7_0x4_0x8_0x3_0xb_0xc_0xf"] = "quic-go",
["51_43-0xf_0x7_0x4"] = "ngtcp2",
["43_51-0x6_0x7_0x4_0x8_0xa_0x3_0xf"] = "mvfst",
["51_43-0x3_0x4_0x6_0x7_0x8_0xa_0xb_0xc_0xf"] = "quiche",
["43_51-0x3_0x4_0x6_0x7_0x8_0xa_0xb_0xf"] = "kwik",
["51_43-0x4_0x8_0x3_0x6_0x7_0xb_0xf"] = "picoquic",
["51_43-0x4_0x6_0x7_0x8_0xa_0xb_0xf"] = "aioquic",
["43_51-0x3_0x4_0x6_0x7_0xa_0xb_0xf"] = "msquic",
["43_51-0x3_0x4_0x6_0x7_0x8_0xc_0xf"] = "xquic",
["51_43-0x4_0x7_0x8_0xf"] = "lsquic",
["43_51-0x3_0x4_0x6_0x7_0x8_0xf"] = "quinn",
["43_51-0x4_0x6_0x7_0x8_0xf"] = "s2n-quic",
["43_51-0x3_0x4_0x6_0x7_0xc_0xf"] = "go-x-net",
["43_51-0x6_0x7_0x4_0x8_0xa_0x3"] = "mvfst(pre rfc)", --- mvfst draft-27
["43_51-0xf_0x6_0x7_0x4_0x3"] = "mvfst",
["51_43-0x3_0x4_0x6_0x7_0x8_0xa_0xb_0xf"] = "tquic"
}
local known_fingerprints_sorted = {
["43_51-0x3_0x4_0x6_0x7_0x8_0xf"] = "google-quiche",
["51_43-0x3_0x4_0x6_0x7_0x8_0xf"] = "google-quiche",
["51_43-0x4_0x6_0x7_0x8_0xb_0xc_0xf"] = "neqo",
["51_43-0x4_0x6_0x7_0xf"] = "applequic",
["43_51-0x4_0x6_0x7_0x8_0xf"] = "applequic", --- seen with mask.icloud.com
}
local known_fingerprints_tp_values = {
["30000_M_25165824_12582912_1048576_1048576_16_16_8_1200"] = "Firefox",
["30000_1452_6291456_163840_163840_163840_2048_2048_5_M"] = "Generic Meta apps",
["60000_1500_6291456_163840_163840_163840_2048_2048_5_M"] = "Instagram app",
["60000_1280_6291456_163840_163840_163840_2048_2048_5_M"] = "Instagram app",
["30000_1280_6291456_163840_163840_163840_2048_2048_5_M"] = "Instagram app",
["30000_1280_6291456_163840_262144_262144_M_100_7_M"] = "Instagram app",
["30000_1252_6291456_163840_262144_262144_2048_100_2_M"] = "Instagram app",
["30000_1252_1000000000_163840_1000000000_1000000000_2048_100_2_M"] = "Instagram app",
["20000_1472_15728640_6291456_6291456_6291456_100_103_M_65536"] = "Snapchat app",
["240000_1472_15728640_6291456_6291456_6291456_100_103_M_65536"] = "Snapchat app",
["30000_1472_16384_16384_16384_16384_100_100_M_65536"] = "Snapchat app; audio/video call",
["120000_1472_15728640_6291456_6291456_6291456_100_103_M_65536"] = "Youtube app (android)",
["30000_1472_15728640_6291456_6291456_6291456_100_103_M_65536"] = "Generic Chrome-like",
["300000_1472_15728640_6291456_6291456_6291456_100_103_M_65536"] = "Android OS traffic",
["M_M_33554432_2097152_2097152_2097152_M_103_64_M"] = "Generic app on iOS",
["M_M_16777216_2097152_2097152_2097152_M_103_64_M"] = "Generic app on iOS",
["M_M_2097152_131072_131072_131072_M_103_64_M"] = "Generic app on iOS",
["M_M_1048576_131072_131072_131072_M_103_64_M"] = "Generic app on iOS",
["M_M_16777216_2097152_2097152_2097152_8_8_64_65535"] = "iCloud Private Relay",
["M_1472_16777216_2097152_2097152_2097152_8_8_64_65535"] = "iCloud Private Relay",
["30000_M_33554432_2097152_2097152_2097152_8_8_64_65535"] = "iCloud Private Relay",
["30000_M_16777216_2097152_2097152_2097152_8_8_64_65535"] = "iCloud Private Relay",
["30000_1472_16777216_2097152_2097152_2097152_8_8_64_65535"] = "iCloud Private Relay",
["60000_M_1000000_256000_256000_256000_1_100_7_M"] = "Temu app (iOS)",
["120000_1500_34359738368_16777216_16777216_16777216_1024_1024_8_M"] = "AliExpress app",
["M_1472_16777216_32768_32768_32768_M_M_4_M"] = "Windows SMB",
["M_1472_16777216_65536_65536_65536_M_M_4_M"] = "Windows SMB",
}
-- Create a new protocol for registering a post-dissector
local proto = Proto("quic_fingerprint", "QUIC FP")
-- Create a field for the fingerprint
local field_fingerprint_simple = ProtoField.string("quic_fingerprint.simple", "QUIC Fingerprint (simple)")
local field_fingerprint_simple_sorted = ProtoField.string("quic_fingerprint.simple.sorted", "QUIC Fingerprint (simple) Sorted")
local field_fingerprint_all = ProtoField.string("quic_fingerprint.all", "QUIC Fingerprint (all parameters)")
local field_fingerprint_all_sorted = ProtoField.string("quic_fingerprint.all.sorted", "QUIC Fingerprint (all parameters) Sorted")
local field_guessed_library = ProtoField.string("quic_fingerprint.library", "QUIC Library")
local field_guessed_app = ProtoField.string("quic_fingerprint.app", "QUIC Application")
local field_fingerprint_values = ProtoField.string("quic_fingerprint.values", "QUIC Fingerprint (values)") -- Only sorted version
proto.fields = {
field_fingerprint_simple,
field_fingerprint_simple_sorted,
field_fingerprint_all,
field_fingerprint_all_sorted,
field_guessed_library,
field_guessed_app,
field_fingerprint_values,
}
local function is_grease(value)
if (tonumber(value) - 27) % 31 == 0 then
return true
end
return false
end
function dump(o)
if type(o) == 'table' then
local s = '{ '
for k,v in pairs(o) do
if type(k) ~= 'number' then k = '"'..k..'"' end
s = s .. '['..k..'] = ' .. dump(v) .. ','
end
return s .. '} '
else
return tostring(o)
end
end
-- The dissector function callback
function proto.dissector(tvb, pinfo, tree)
local fingerprint = { {}, {} }
local fingerprint_all = { {}, {} }
for name, field in pairs(fields) do
local values = { field() }
if #values == 0 then return end
for _, value in ipairs(values) do
if name == "tls" then
value = tostring(value)
if lookup_tls_extensions[value] then
table.insert(fingerprint[1], value)
--table.insert(fingerprint_all[1], value)
end
elseif name == "quic" then
value = string.format("0x%x", tostring(value))
if lookup_transport_parameters[value] then
table.insert(fingerprint[2], value)
end
if is_grease(value) == false then
table.insert(fingerprint_all[2], value)
end
end
end
end
if #fingerprint[1] == 0 or #fingerprint[2] == 0 then return end
local fingerprint_values = {}
local tp_value
tps_value = tps_values.tp_max_idle_timeout()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
tps_value = tps_values.tp_max_udp_payload_size()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
tps_value = tps_values.tp_initial_max_data()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
tps_value = tps_values.tp_initial_max_stream_data_bidi_local()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
tps_value = tps_values.tp_initial_max_stream_data_bidi_remote()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
tps_value = tps_values.tp_initial_max_stream_data_uni()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
tps_value = tps_values.tp_initial_max_streams_bidi()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
tps_value = tps_values.tp_initial_max_streams_uni()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
tps_value = tps_values.tp_active_connection_id_limit()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
tps_value = tps_values.tp_max_datagram_frame_size()
table.insert(fingerprint_values, tps_value == nil and "M" or tostring(tps_value))
-- Create a string representation of the fingerprint
local fingerprint_str = table.concat(fingerprint[1], "_") .. "-" .. table.concat(fingerprint[2], "_")
--local fingerprint_all_str = table.concat(fingerprint_all[1], "_") .. "-" .. table.concat(fingerprint_all[2], "_")
local fingerprint_all_str = table.concat(fingerprint_all[2], "_")
-- Sort the transport parameters
table.sort(fingerprint[2])
local fingerprint_str_sorted = table.concat(fingerprint[1], "_") .. "-" .. table.concat(fingerprint[2], "_")
table.sort(fingerprint_all[2])
--local fingerprint_all_str_sorted = table.concat(fingerprint_all[1], "_") .. "-" .. table.concat(fingerprint_all[2], "_")
local fingerprint_all_str_sorted = table.concat(fingerprint_all[2], "_")
-- Guess the libraries
local guesses = {}
table.insert(guesses, known_fingerprints[fingerprint_str])
table.insert(guesses, known_fingerprints_sorted[fingerprint_str_sorted])
print(dump(fingerprint_values))
local fingerprint_values_str = table.concat(fingerprint_values, "_")
-- Guess the application
local guessed_app = {}
table.insert(guessed_app, known_fingerprints_tp_values[fingerprint_values_str])
-- Add the fingerprint to the dissection tree
local fingerprint_tree = tree:add(proto):set_generated()
fingerprint_tree:add(field_fingerprint_simple, fingerprint_str):set_generated()
fingerprint_tree:add(field_fingerprint_simple_sorted, fingerprint_str_sorted):set_generated()
fingerprint_tree:add(field_guessed_library, #guesses > 0 and table.concat(guesses, ", ") or "Unknown"):set_generated()
fingerprint_tree:add(field_fingerprint_all, fingerprint_all_str):set_generated()
fingerprint_tree:add(field_fingerprint_all_sorted, fingerprint_all_str_sorted):set_generated()
fingerprint_tree:add(field_guessed_app, #guessed_app > 0 and table.concat(guessed_app, ", ") or "Unknown"):set_generated()
fingerprint_tree:add(field_fingerprint_values, fingerprint_values_str):set_generated()
end
-- Register the protocol as a post-dissector
register_postdissector(proto)
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