mirror of
https://github.com/trezor/trezor-firmware.git
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108 lines
3.4 KiB
Python
Executable File
108 lines
3.4 KiB
Python
Executable File
#!/usr/bin/env python3
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# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2022 SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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from __future__ import annotations
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import click
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import requests
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import zipfile
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from pathlib import Path
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from trezorlib import definitions, merkle_tree
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ZIP_FILENAME = "definitions-sparse.zip"
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TOPDIRS = ("chain-id", "slip44")
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class SparseZipSource(definitions.Source):
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def __init__(self, zip: Path | zipfile.ZipFile) -> None:
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if isinstance(zip, Path):
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self.zip = zipfile.ZipFile(zip)
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else:
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self.zip = zip
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# extract signature
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self.signature = self.read_bytes("signature.dat")
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self.root_hash = self.read_bytes("root.dat")
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# construct a Merkle tree
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entries = []
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for name in self.zip.namelist():
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if name.startswith("chain-id/"):
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entries.append(self.read_bytes(name))
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entries.sort()
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self.merkle_tree = merkle_tree.MerkleTree(entries)
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if self.root_hash != self.merkle_tree.get_root_hash():
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raise ValueError("Failed to reconstruct the correct Merkle tree")
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def read_bytes(self, path: str | Path) -> bytes:
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with self.zip.open(str(path)) as f:
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return f.read()
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def fetch_path(self, *components: str) -> bytes | None:
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path = "/".join(components)
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data = self.read_bytes(path)
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proof = self.merkle_tree.get_proof(data)
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proof_bytes = definitions.ProofFormat.build(proof)
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return data + proof_bytes + self.signature
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@click.command()
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@click.option(
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"-z",
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"--definitions-zip",
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type=click.Path(exists=True, dir_okay=False, resolve_path=True, path_type=Path),
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help="Local zip file with stored definitions.",
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)
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@click.argument(
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"outdir",
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type=click.Path(resolve_path=True, file_okay=False, writable=True, path_type=Path),
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)
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def unpack_definitions(definitions_zip: Path, outdir: Path) -> None:
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"""Script that unpacks and completes (insert missing Merkle Tree proofs
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into the definitions) the Ethereum definitions (networks and tokens).
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If no local zip is provided, the latest one will be downloaded from trezor.io.
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"""
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if definitions_zip is None:
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result = requests.get(definitions.DEFS_BASE_URL + ZIP_FILENAME)
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result.raise_for_status()
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zip = zipfile.ZipFile(result.raw)
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else:
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zip = zipfile.ZipFile(definitions_zip)
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source = SparseZipSource(zip)
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if not outdir.exists():
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outdir.mkdir()
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for name in zip.namelist():
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if name == "signature.dat" or not name.endswith(".dat"):
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continue
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local_path = outdir / name
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local_path.parent.mkdir(parents=True, exist_ok=True)
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data = source.fetch_path(name)
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assert data is not None, f"Could not read data for: {name}"
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local_path.write_bytes(data)
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if __name__ == "__main__":
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unpack_definitions()
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