409 lines
12 KiB
Python
409 lines
12 KiB
Python
import hashlib
|
|
import json
|
|
import re
|
|
import signal
|
|
import sys
|
|
import copy
|
|
from typing import Any, Callable, Optional
|
|
|
|
from client import keychain
|
|
from client.client import EthAppClient, EIP712FieldType
|
|
|
|
|
|
# global variables
|
|
app_client: EthAppClient = None
|
|
filtering_paths: dict = {}
|
|
current_path: list[str] = list()
|
|
sig_ctx: dict[str, Any] = {}
|
|
|
|
|
|
def default_handler():
|
|
raise RuntimeError("Uninitialized handler")
|
|
|
|
|
|
autonext_handler: Callable = default_handler
|
|
|
|
|
|
# From a string typename, extract the type and all the array depth
|
|
# Input = "uint8[2][][4]" | "bool"
|
|
# Output = ('uint8', [2, None, 4]) | ('bool', [])
|
|
def get_array_levels(typename):
|
|
array_lvls = list()
|
|
regex = re.compile(r"(.*)\[([0-9]*)\]$")
|
|
|
|
while True:
|
|
result = regex.search(typename)
|
|
if not result:
|
|
break
|
|
typename = result.group(1)
|
|
|
|
level_size = result.group(2)
|
|
if len(level_size) == 0:
|
|
level_size = None
|
|
else:
|
|
level_size = int(level_size)
|
|
array_lvls.insert(0, level_size)
|
|
return (typename, array_lvls)
|
|
|
|
|
|
# From a string typename, extract the type and its size
|
|
# Input = "uint64" | "string"
|
|
# Output = ('uint', 64) | ('string', None)
|
|
def get_typesize(typename):
|
|
regex = re.compile(r"^(\w+?)(\d*)$")
|
|
result = regex.search(typename)
|
|
typename = result.group(1)
|
|
typesize = result.group(2)
|
|
if len(typesize) == 0:
|
|
typesize = None
|
|
else:
|
|
typesize = int(typesize)
|
|
return (typename, typesize)
|
|
|
|
|
|
def parse_int(typesize):
|
|
return (EIP712FieldType.INT, int(typesize / 8))
|
|
|
|
|
|
def parse_uint(typesize):
|
|
return (EIP712FieldType.UINT, int(typesize / 8))
|
|
|
|
|
|
def parse_address(typesize):
|
|
return (EIP712FieldType.ADDRESS, None)
|
|
|
|
|
|
def parse_bool(typesize):
|
|
return (EIP712FieldType.BOOL, None)
|
|
|
|
|
|
def parse_string(typesize):
|
|
return (EIP712FieldType.STRING, None)
|
|
|
|
|
|
def parse_bytes(typesize):
|
|
if typesize is not None:
|
|
return (EIP712FieldType.FIX_BYTES, typesize)
|
|
return (EIP712FieldType.DYN_BYTES, None)
|
|
|
|
|
|
# set functions for each type
|
|
parsing_type_functions = {}
|
|
parsing_type_functions["int"] = parse_int
|
|
parsing_type_functions["uint"] = parse_uint
|
|
parsing_type_functions["address"] = parse_address
|
|
parsing_type_functions["bool"] = parse_bool
|
|
parsing_type_functions["string"] = parse_string
|
|
parsing_type_functions["bytes"] = parse_bytes
|
|
|
|
|
|
def send_struct_def_field(typename, keyname):
|
|
type_enum = None
|
|
|
|
(typename, array_lvls) = get_array_levels(typename)
|
|
(typename, typesize) = get_typesize(typename)
|
|
|
|
if typename in parsing_type_functions.keys():
|
|
(type_enum, typesize) = parsing_type_functions[typename](typesize)
|
|
else:
|
|
type_enum = EIP712FieldType.CUSTOM
|
|
typesize = None
|
|
|
|
with app_client.eip712_send_struct_def_struct_field(type_enum,
|
|
typename,
|
|
typesize,
|
|
array_lvls,
|
|
keyname):
|
|
pass
|
|
return (typename, type_enum, typesize, array_lvls)
|
|
|
|
|
|
def encode_integer(value, typesize):
|
|
data = bytearray()
|
|
|
|
# Some are already represented as integers in the JSON, but most as strings
|
|
if isinstance(value, str):
|
|
base = 10
|
|
if value.startswith("0x"):
|
|
base = 16
|
|
value = int(value, base)
|
|
|
|
if value == 0:
|
|
data.append(0)
|
|
else:
|
|
if value < 0: # negative number, send it as unsigned
|
|
mask = 0
|
|
for i in range(typesize): # make a mask as big as the typesize
|
|
mask = (mask << 8) | 0xff
|
|
value &= mask
|
|
while value > 0:
|
|
data.append(value & 0xff)
|
|
value >>= 8
|
|
data.reverse()
|
|
return data
|
|
|
|
|
|
def encode_int(value, typesize):
|
|
return encode_integer(value, typesize)
|
|
|
|
|
|
def encode_uint(value, typesize):
|
|
return encode_integer(value, typesize)
|
|
|
|
|
|
def encode_hex_string(value, size):
|
|
data = bytearray()
|
|
value = value[2:] # skip 0x
|
|
byte_idx = 0
|
|
while byte_idx < size:
|
|
data.append(int(value[(byte_idx * 2):(byte_idx * 2 + 2)], 16))
|
|
byte_idx += 1
|
|
return data
|
|
|
|
|
|
def encode_address(value, typesize):
|
|
return encode_hex_string(value, 20)
|
|
|
|
|
|
def encode_bool(value, typesize):
|
|
return encode_integer(value, typesize)
|
|
|
|
|
|
def encode_string(value, typesize):
|
|
data = bytearray()
|
|
for char in value:
|
|
data.append(ord(char))
|
|
return data
|
|
|
|
|
|
def encode_bytes_fix(value, typesize):
|
|
return encode_hex_string(value, typesize)
|
|
|
|
|
|
def encode_bytes_dyn(value, typesize):
|
|
# length of the value string
|
|
# - the length of 0x (2)
|
|
# / by the length of one byte in a hex string (2)
|
|
return encode_hex_string(value, int((len(value) - 2) / 2))
|
|
|
|
|
|
# set functions for each type
|
|
encoding_functions = {}
|
|
encoding_functions[EIP712FieldType.INT] = encode_int
|
|
encoding_functions[EIP712FieldType.UINT] = encode_uint
|
|
encoding_functions[EIP712FieldType.ADDRESS] = encode_address
|
|
encoding_functions[EIP712FieldType.BOOL] = encode_bool
|
|
encoding_functions[EIP712FieldType.STRING] = encode_string
|
|
encoding_functions[EIP712FieldType.FIX_BYTES] = encode_bytes_fix
|
|
encoding_functions[EIP712FieldType.DYN_BYTES] = encode_bytes_dyn
|
|
|
|
|
|
def send_struct_impl_field(value, field):
|
|
# Something wrong happened if this triggers
|
|
if isinstance(value, list) or (field["enum"] == EIP712FieldType.CUSTOM):
|
|
breakpoint()
|
|
|
|
data = encoding_functions[field["enum"]](value, field["typesize"])
|
|
|
|
if filtering_paths:
|
|
path = ".".join(current_path)
|
|
if path in filtering_paths.keys():
|
|
send_filtering_show_field(filtering_paths[path])
|
|
|
|
with app_client.eip712_send_struct_impl_struct_field(data):
|
|
enable_autonext()
|
|
disable_autonext()
|
|
|
|
|
|
def evaluate_field(structs, data, field, lvls_left, new_level=True):
|
|
array_lvls = field["array_lvls"]
|
|
|
|
if new_level:
|
|
current_path.append(field["name"])
|
|
if len(array_lvls) > 0 and lvls_left > 0:
|
|
with app_client.eip712_send_struct_impl_array(len(data)):
|
|
pass
|
|
idx = 0
|
|
for subdata in data:
|
|
current_path.append("[]")
|
|
if not evaluate_field(structs, subdata, field, lvls_left - 1, False):
|
|
return False
|
|
current_path.pop()
|
|
idx += 1
|
|
if array_lvls[lvls_left - 1] is not None:
|
|
if array_lvls[lvls_left - 1] != idx:
|
|
print("Mismatch in array size! Got %d, expected %d\n" %
|
|
(idx, array_lvls[lvls_left - 1]),
|
|
file=sys.stderr)
|
|
return False
|
|
else:
|
|
if field["enum"] == EIP712FieldType.CUSTOM:
|
|
if not send_struct_impl(structs, data, field["type"]):
|
|
return False
|
|
else:
|
|
send_struct_impl_field(data, field)
|
|
if new_level:
|
|
current_path.pop()
|
|
return True
|
|
|
|
|
|
def send_struct_impl(structs, data, structname):
|
|
# Check if it is a struct we don't known
|
|
if structname not in structs.keys():
|
|
return False
|
|
|
|
struct = structs[structname]
|
|
for f in struct:
|
|
if not evaluate_field(structs, data[f["name"]], f, len(f["array_lvls"])):
|
|
return False
|
|
return True
|
|
|
|
|
|
# ledgerjs doesn't actually sign anything, and instead uses already pre-computed signatures
|
|
def send_filtering_message_info(display_name: str, filters_count: int):
|
|
global sig_ctx
|
|
|
|
to_sign = bytearray()
|
|
to_sign.append(183)
|
|
to_sign += sig_ctx["chainid"]
|
|
to_sign += sig_ctx["caddr"]
|
|
to_sign += sig_ctx["schema_hash"]
|
|
to_sign.append(filters_count)
|
|
for char in display_name:
|
|
to_sign.append(ord(char))
|
|
|
|
sig = keychain.sign_data(keychain.Key.CAL, to_sign)
|
|
with app_client.eip712_filtering_message_info(display_name, filters_count, sig):
|
|
enable_autonext()
|
|
disable_autonext()
|
|
|
|
|
|
# ledgerjs doesn't actually sign anything, and instead uses already pre-computed signatures
|
|
def send_filtering_show_field(display_name):
|
|
global sig_ctx
|
|
|
|
path_str = ".".join(current_path)
|
|
|
|
to_sign = bytearray()
|
|
to_sign.append(72)
|
|
to_sign += sig_ctx["chainid"]
|
|
to_sign += sig_ctx["caddr"]
|
|
to_sign += sig_ctx["schema_hash"]
|
|
for char in path_str:
|
|
to_sign.append(ord(char))
|
|
for char in display_name:
|
|
to_sign.append(ord(char))
|
|
sig = keychain.sign_data(keychain.Key.CAL, to_sign)
|
|
with app_client.eip712_filtering_show_field(display_name, sig):
|
|
pass
|
|
|
|
|
|
def prepare_filtering(filtr_data, message):
|
|
global filtering_paths
|
|
|
|
if "fields" in filtr_data:
|
|
filtering_paths = filtr_data["fields"]
|
|
else:
|
|
filtering_paths = {}
|
|
|
|
|
|
def handle_optional_domain_values(domain):
|
|
if "chainId" not in domain.keys():
|
|
domain["chainId"] = 0
|
|
if "verifyingContract" not in domain.keys():
|
|
domain["verifyingContract"] = "0x0000000000000000000000000000000000000000"
|
|
|
|
|
|
def init_signature_context(types, domain):
|
|
global sig_ctx
|
|
|
|
handle_optional_domain_values(domain)
|
|
caddr = domain["verifyingContract"]
|
|
if caddr.startswith("0x"):
|
|
caddr = caddr[2:]
|
|
sig_ctx["caddr"] = bytearray.fromhex(caddr)
|
|
chainid = domain["chainId"]
|
|
sig_ctx["chainid"] = bytearray()
|
|
for i in range(8):
|
|
sig_ctx["chainid"].append(chainid & (0xff << (i * 8)))
|
|
sig_ctx["chainid"].reverse()
|
|
schema_str = json.dumps(types).replace(" ", "")
|
|
schema_hash = hashlib.sha224(schema_str.encode())
|
|
sig_ctx["schema_hash"] = bytearray.fromhex(schema_hash.hexdigest())
|
|
|
|
|
|
def next_timeout(_signum: int, _frame):
|
|
autonext_handler()
|
|
|
|
|
|
def enable_autonext():
|
|
if app_client._client.firmware.device == 'stax': # Stax Speculos is slow
|
|
delay = 1.5
|
|
else:
|
|
delay = 1/4
|
|
signal.setitimer(signal.ITIMER_REAL, delay, delay)
|
|
|
|
|
|
def disable_autonext():
|
|
signal.setitimer(signal.ITIMER_REAL, 0, 0)
|
|
|
|
|
|
def process_data(aclient: EthAppClient,
|
|
data_json: dict,
|
|
filters: Optional[dict] = None,
|
|
autonext: Optional[Callable] = None) -> bool:
|
|
global sig_ctx
|
|
global app_client
|
|
global autonext_handler
|
|
|
|
# deepcopy because this function modifies the dict
|
|
data_json = copy.deepcopy(data_json)
|
|
app_client = aclient
|
|
domain_typename = "EIP712Domain"
|
|
message_typename = data_json["primaryType"]
|
|
types = data_json["types"]
|
|
domain = data_json["domain"]
|
|
message = data_json["message"]
|
|
|
|
if autonext:
|
|
autonext_handler = autonext
|
|
signal.signal(signal.SIGALRM, next_timeout)
|
|
|
|
if filters:
|
|
init_signature_context(types, domain)
|
|
|
|
# send types definition
|
|
for key in types.keys():
|
|
with app_client.eip712_send_struct_def_struct_name(key):
|
|
pass
|
|
for f in types[key]:
|
|
(f["type"], f["enum"], f["typesize"], f["array_lvls"]) = \
|
|
send_struct_def_field(f["type"], f["name"])
|
|
|
|
if filters:
|
|
with app_client.eip712_filtering_activate():
|
|
pass
|
|
prepare_filtering(filters, message)
|
|
|
|
# send domain implementation
|
|
with app_client.eip712_send_struct_impl_root_struct(domain_typename):
|
|
enable_autonext()
|
|
disable_autonext()
|
|
if not send_struct_impl(types, domain, domain_typename):
|
|
return False
|
|
|
|
if filters:
|
|
if filters and "name" in filters:
|
|
send_filtering_message_info(filters["name"], len(filtering_paths))
|
|
else:
|
|
send_filtering_message_info(domain["name"], len(filtering_paths))
|
|
|
|
# send message implementation
|
|
with app_client.eip712_send_struct_impl_root_struct(message_typename):
|
|
enable_autonext()
|
|
disable_autonext()
|
|
if not send_struct_impl(types, message, message_typename):
|
|
return False
|
|
|
|
return True
|