mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 05:28:40 +00:00
268 lines
6.8 KiB
Python
268 lines
6.8 KiB
Python
# This file is part of the Trezor project.
|
|
#
|
|
# Copyright (C) 2012-2018 SatoshiLabs and contributors
|
|
#
|
|
# This library is free software: you can redistribute it and/or modify
|
|
# it under the terms of the GNU Lesser General Public License version 3
|
|
# as published by the Free Software Foundation.
|
|
#
|
|
# This library is distributed in the hope that it will be useful,
|
|
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
# GNU Lesser General Public License for more details.
|
|
#
|
|
# You should have received a copy of the License along with this library.
|
|
# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
|
|
|
|
import functools
|
|
import hashlib
|
|
import re
|
|
import struct
|
|
import unicodedata
|
|
from typing import List, NewType
|
|
|
|
from .coins import slip44
|
|
from .exceptions import TrezorFailure
|
|
|
|
CallException = TrezorFailure
|
|
|
|
HARDENED_FLAG = 1 << 31
|
|
|
|
Address = NewType("Address", List[int])
|
|
|
|
|
|
def H_(x: int) -> int:
|
|
"""
|
|
Shortcut function that "hardens" a number in a BIP44 path.
|
|
"""
|
|
return x | HARDENED_FLAG
|
|
|
|
|
|
def btc_hash(data):
|
|
"""
|
|
Double-SHA256 hash as used in BTC
|
|
"""
|
|
return hashlib.sha256(hashlib.sha256(data).digest()).digest()
|
|
|
|
|
|
def hash_160(public_key):
|
|
md = hashlib.new("ripemd160")
|
|
md.update(hashlib.sha256(public_key).digest())
|
|
return md.digest()
|
|
|
|
|
|
def hash_160_to_bc_address(h160, address_type):
|
|
vh160 = struct.pack("<B", address_type) + h160
|
|
h = btc_hash(vh160)
|
|
addr = vh160 + h[0:4]
|
|
return b58encode(addr)
|
|
|
|
|
|
def compress_pubkey(public_key):
|
|
if public_key[0] == 4:
|
|
return bytes((public_key[64] & 1) + 2) + public_key[1:33]
|
|
raise ValueError("Pubkey is already compressed")
|
|
|
|
|
|
def public_key_to_bc_address(public_key, address_type, compress=True):
|
|
if public_key[0] == "\x04" and compress:
|
|
public_key = compress_pubkey(public_key)
|
|
|
|
h160 = hash_160(public_key)
|
|
return hash_160_to_bc_address(h160, address_type)
|
|
|
|
|
|
__b58chars = "123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
|
|
__b58base = len(__b58chars)
|
|
|
|
|
|
def b58encode(v):
|
|
""" encode v, which is a string of bytes, to base58."""
|
|
|
|
long_value = 0
|
|
for c in v:
|
|
long_value = long_value * 256 + c
|
|
|
|
result = ""
|
|
while long_value >= __b58base:
|
|
div, mod = divmod(long_value, __b58base)
|
|
result = __b58chars[mod] + result
|
|
long_value = div
|
|
result = __b58chars[long_value] + result
|
|
|
|
# Bitcoin does a little leading-zero-compression:
|
|
# leading 0-bytes in the input become leading-1s
|
|
nPad = 0
|
|
for c in v:
|
|
if c == 0:
|
|
nPad += 1
|
|
else:
|
|
break
|
|
|
|
return (__b58chars[0] * nPad) + result
|
|
|
|
|
|
def b58decode(v, length=None):
|
|
""" decode v into a string of len bytes."""
|
|
if isinstance(v, bytes):
|
|
v = v.decode()
|
|
|
|
long_value = 0
|
|
for (i, c) in enumerate(v[::-1]):
|
|
long_value += __b58chars.find(c) * (__b58base ** i)
|
|
|
|
result = b""
|
|
while long_value >= 256:
|
|
div, mod = divmod(long_value, 256)
|
|
result = struct.pack("B", mod) + result
|
|
long_value = div
|
|
result = struct.pack("B", long_value) + result
|
|
|
|
nPad = 0
|
|
for c in v:
|
|
if c == __b58chars[0]:
|
|
nPad += 1
|
|
else:
|
|
break
|
|
|
|
result = b"\x00" * nPad + result
|
|
if length is not None and len(result) != length:
|
|
return None
|
|
|
|
return result
|
|
|
|
|
|
def b58check_encode(v):
|
|
checksum = btc_hash(v)[:4]
|
|
return b58encode(v + checksum)
|
|
|
|
|
|
def b58check_decode(v, length=None):
|
|
dec = b58decode(v, length)
|
|
data, checksum = dec[:-4], dec[-4:]
|
|
if btc_hash(data)[:4] != checksum:
|
|
raise ValueError("invalid checksum")
|
|
return data
|
|
|
|
|
|
def parse_path(nstr: str) -> Address:
|
|
"""
|
|
Convert BIP32 path string to list of uint32 integers with hardened flags.
|
|
Several conventions are supported to set the hardened flag: -1, 1', 1h
|
|
|
|
e.g.: "0/1h/1" -> [0, 0x80000001, 1]
|
|
|
|
:param nstr: path string
|
|
:return: list of integers
|
|
"""
|
|
if not nstr:
|
|
return []
|
|
|
|
n = nstr.split("/")
|
|
|
|
# m/a/b/c => a/b/c
|
|
if n[0] == "m":
|
|
n = n[1:]
|
|
|
|
# coin_name/a/b/c => 44'/SLIP44_constant'/a/b/c
|
|
if n[0] in slip44:
|
|
coin_id = slip44[n[0]]
|
|
n[0:1] = ["44h", "{}h".format(coin_id)]
|
|
|
|
def str_to_harden(x: str) -> int:
|
|
if x.startswith("-"):
|
|
return H_(abs(int(x)))
|
|
elif x.endswith(("h", "'")):
|
|
return H_(int(x[:-1]))
|
|
else:
|
|
return int(x)
|
|
|
|
try:
|
|
return [str_to_harden(x) for x in n]
|
|
except Exception:
|
|
raise ValueError("Invalid BIP32 path", nstr)
|
|
|
|
|
|
def normalize_nfc(txt):
|
|
"""
|
|
Normalize message to NFC and return bytes suitable for protobuf.
|
|
This seems to be bitcoin-qt standard of doing things.
|
|
"""
|
|
if isinstance(txt, bytes):
|
|
txt = txt.decode()
|
|
return unicodedata.normalize("NFC", txt).encode()
|
|
|
|
|
|
class expect:
|
|
# Decorator checks if the method
|
|
# returned one of expected protobuf messages
|
|
# or raises an exception
|
|
def __init__(self, expected, field=None):
|
|
self.expected = expected
|
|
self.field = field
|
|
|
|
def __call__(self, f):
|
|
@functools.wraps(f)
|
|
def wrapped_f(*args, **kwargs):
|
|
__tracebackhide__ = True # for pytest # pylint: disable=W0612
|
|
ret = f(*args, **kwargs)
|
|
if not isinstance(ret, self.expected):
|
|
raise RuntimeError(
|
|
"Got %s, expected %s" % (ret.__class__, self.expected)
|
|
)
|
|
if self.field is not None:
|
|
return getattr(ret, self.field)
|
|
else:
|
|
return ret
|
|
|
|
return wrapped_f
|
|
|
|
|
|
def session(f):
|
|
# Decorator wraps a BaseClient method
|
|
# with session activation / deactivation
|
|
@functools.wraps(f)
|
|
def wrapped_f(client, *args, **kwargs):
|
|
__tracebackhide__ = True # for pytest # pylint: disable=W0612
|
|
client.open()
|
|
try:
|
|
return f(client, *args, **kwargs)
|
|
finally:
|
|
client.close()
|
|
|
|
return wrapped_f
|
|
|
|
|
|
# de-camelcasifier
|
|
# https://stackoverflow.com/a/1176023/222189
|
|
|
|
FIRST_CAP_RE = re.compile("(.)([A-Z][a-z]+)")
|
|
ALL_CAP_RE = re.compile("([a-z0-9])([A-Z])")
|
|
|
|
|
|
def from_camelcase(s):
|
|
s = FIRST_CAP_RE.sub(r"\1_\2", s)
|
|
return ALL_CAP_RE.sub(r"\1_\2", s).lower()
|
|
|
|
|
|
def dict_from_camelcase(d, renames=None):
|
|
if not isinstance(d, dict):
|
|
return d
|
|
|
|
if renames is None:
|
|
renames = {}
|
|
|
|
res = {}
|
|
for key, value in d.items():
|
|
newkey = from_camelcase(key)
|
|
renamed_key = renames.get(newkey) or renames.get(key)
|
|
if renamed_key:
|
|
newkey = renamed_key
|
|
|
|
if isinstance(value, list):
|
|
res[newkey] = [dict_from_camelcase(v, renames) for v in value]
|
|
else:
|
|
res[newkey] = dict_from_camelcase(value, renames)
|
|
|
|
return res
|