mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-04 21:48:17 +00:00
a5aa515631
had to add a typestub for PIL due to https://github.com/microsoft/pyright/issues/7832 We should remove it if that is either fixed or, if I fail to convince Eric, after the relevant type information is added to Pillow [no changelog]
146 lines
4.3 KiB
Python
146 lines
4.3 KiB
Python
import logging
|
|
import tarfile
|
|
import typing as t
|
|
from pathlib import Path
|
|
|
|
import construct as c
|
|
import requests
|
|
from construct_classes import Struct, subcon
|
|
|
|
from . import cosi, merkle_tree
|
|
from .messages import EthereumDefinitionType
|
|
from .tools import EnumAdapter
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
FORMAT_MAGIC = b"trzd1"
|
|
DEFS_BASE_URL = "https://data.trezor.io/firmware/eth-definitions/"
|
|
|
|
DEFINITIONS_DEV_SIGS_REQUIRED = 1
|
|
DEFINITIONS_DEV_PUBLIC_KEYS = [
|
|
bytes.fromhex(key)
|
|
for key in ("db995fe25169d141cab9bbba92baa01f9f2e1ece7df4cb2ac05190f37fcc1f9d",)
|
|
]
|
|
|
|
DEFINITIONS_SIGS_REQUIRED = 2
|
|
DEFINITIONS_PUBLIC_KEYS = [
|
|
bytes.fromhex(key)
|
|
for key in (
|
|
"4334996343623e462f0fc93311fef1484ca23d2ff1eec6df1fa8eb7e3573b3db",
|
|
"a9a22cc265a0cb1d6cb329bc0e60bc45df76b9ab28fb87b61136feaf8d8fdc96",
|
|
"b8d2b21de27124f0511f903ae7e60e07961810a0b8f28ea755fa50367a8a2b8b",
|
|
)
|
|
]
|
|
|
|
|
|
ProofFormat = c.PrefixedArray(c.Int8ul, c.Bytes(32))
|
|
|
|
|
|
class DefinitionPayload(Struct):
|
|
magic: bytes
|
|
data_type: EthereumDefinitionType
|
|
timestamp: int
|
|
data: bytes
|
|
|
|
SUBCON = c.Struct(
|
|
"magic" / c.Const(FORMAT_MAGIC),
|
|
"data_type" / EnumAdapter(c.Int8ul, EthereumDefinitionType),
|
|
"timestamp" / c.Int32ul,
|
|
"data" / c.Prefixed(c.Int16ul, c.GreedyBytes),
|
|
)
|
|
|
|
|
|
class Definition(Struct):
|
|
payload: DefinitionPayload = subcon(DefinitionPayload)
|
|
proof: t.List[bytes]
|
|
sigmask: int
|
|
signature: bytes
|
|
|
|
SUBCON = c.Struct(
|
|
"payload" / DefinitionPayload.SUBCON,
|
|
"proof" / ProofFormat,
|
|
"sigmask" / c.Int8ul,
|
|
"signature" / c.Bytes(64),
|
|
)
|
|
|
|
def verify(self, dev: bool = False) -> None:
|
|
payload = self.payload.build()
|
|
root = merkle_tree.evaluate_proof(payload, self.proof)
|
|
cosi.verify(
|
|
self.signature,
|
|
root,
|
|
DEFINITIONS_DEV_SIGS_REQUIRED,
|
|
DEFINITIONS_DEV_PUBLIC_KEYS,
|
|
self.sigmask,
|
|
)
|
|
|
|
|
|
class Source:
|
|
def fetch_path(self, *components: str) -> t.Optional[bytes]:
|
|
raise NotImplementedError
|
|
|
|
def get_network_by_slip44(self, slip44: int) -> t.Optional[bytes]:
|
|
return self.fetch_path("slip44", str(slip44), "network.dat")
|
|
|
|
def get_network(self, chain_id: int) -> t.Optional[bytes]:
|
|
return self.fetch_path("chain-id", str(chain_id), "network.dat")
|
|
|
|
def get_token(self, chain_id: int, address: t.AnyStr) -> t.Optional[bytes]:
|
|
if isinstance(address, bytes):
|
|
address_str = address.hex()
|
|
elif address.startswith("0x"):
|
|
address_str = address[2:]
|
|
else:
|
|
address_str = address
|
|
|
|
address_str = address_str.lower()
|
|
|
|
return self.fetch_path("chain-id", f"{chain_id}", f"token-{address_str}.dat")
|
|
|
|
|
|
class NullSource(Source):
|
|
def fetch_path(self, *components: str) -> t.Optional[bytes]:
|
|
return None
|
|
|
|
|
|
class FilesystemSource(Source):
|
|
def __init__(self, root: Path) -> None:
|
|
self.root = root
|
|
|
|
def fetch_path(self, *components: str) -> t.Optional[bytes]:
|
|
path = self.root.joinpath(*components)
|
|
if not path.exists():
|
|
LOG.info("Requested definition at %s was not found", path)
|
|
return None
|
|
LOG.info("Reading definition from %s", path)
|
|
return path.read_bytes()
|
|
|
|
|
|
class UrlSource(Source):
|
|
def __init__(self, base_url: str = DEFS_BASE_URL) -> None:
|
|
self.base_url = base_url
|
|
|
|
def fetch_path(self, *components: str) -> t.Optional[bytes]:
|
|
url = self.base_url + "/".join(components)
|
|
LOG.info("Downloading definition from %s", url)
|
|
r = requests.get(url)
|
|
if r.status_code == 404:
|
|
LOG.info("Requested definition at %s was not found", url)
|
|
return None
|
|
r.raise_for_status()
|
|
return r.content
|
|
|
|
|
|
class TarSource(Source):
|
|
def __init__(self, path: Path) -> None:
|
|
self.archive = tarfile.open(path)
|
|
|
|
def fetch_path(self, *components: str) -> t.Optional[bytes]:
|
|
inner_name = "/".join(components)
|
|
LOG.info("Extracting definition from %s:%s", self.archive.name, inner_name)
|
|
try:
|
|
return self.archive.extractfile(inner_name).read() # type: ignore [not a known attribute]
|
|
except Exception:
|
|
LOG.info("Requested definition at %s was not found", inner_name)
|
|
return None
|