mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-12-30 10:08:18 +00:00
288 lines
9.4 KiB
Python
288 lines
9.4 KiB
Python
from __future__ import annotations
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import datetime
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import json
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import logging
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import typing as t
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import subprocess
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from pathlib import Path
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import click
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from trezorlib import cosi, models, merkle_tree
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from trezorlib._internal import translations
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HERE = Path(__file__).parent.resolve()
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LOG = logging.getLogger(__name__)
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ALL_MODELS = {models.T2B1, models.T2T1}
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PRIVATE_KEYS_DEV = [byte * 32 for byte in (b"\xdd", b"\xde", b"\xdf")]
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PUBLIC_KEYS_PROD = [
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bytes.fromhex(key)
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for key in (
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# TODO add production public keys
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"aabbccdd" * 8,
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"11223344" * 8,
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"55667788" * 8,
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)
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]
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VERSION_H = HERE.parent / "embed" / "firmware" / "version.h"
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SIGNATURES_JSON = HERE / "signatures.json"
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class SignatureInfo(t.TypedDict):
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merkle_root: str
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signature: str | None
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datetime: str
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commit: str
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class SignatureFile(t.TypedDict):
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current: SignatureInfo
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history: list[SignatureInfo]
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def _version_from_version_h() -> translations.VersionTuple:
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defines: t.Dict[str, int] = {}
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with open(VERSION_H) as f:
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for line in f:
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try:
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define, symbol, number = line.rstrip().split()
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assert define == "#define"
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defines[symbol] = int(number)
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except Exception:
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# not a #define, not a number, wrong number of parts
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continue
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return (
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defines["VERSION_MAJOR"],
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defines["VERSION_MINOR"],
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defines["VERSION_PATCH"],
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defines["VERSION_BUILD"],
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)
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def make_signature_info(merkle_root: bytes, signature: bytes | None) -> SignatureInfo:
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now = datetime.datetime.utcnow()
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commit = (
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subprocess.check_output(["git", "rev-parse", "HEAD"], cwd=HERE)
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.decode("ascii")
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.strip()
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)
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return SignatureInfo(
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merkle_root=merkle_root.hex(),
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signature=signature.hex() if signature is not None else None,
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datetime=now.isoformat(),
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commit=commit,
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)
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def update_merkle_root(signature_file: SignatureFile, merkle_root: bytes) -> bool:
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"""Update signatures.json with the new Merkle root.
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Returns True if the signature file was updated, False if it was already up-to-date.
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"""
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current = signature_file["current"]
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if current["merkle_root"] == merkle_root.hex():
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# Merkle root is already up to date
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return False
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if current["signature"] is None:
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# current content is not signed. just overwrite with a new one
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signature_file["current"] = make_signature_info(merkle_root, None)
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SIGNATURES_JSON.write_text(json.dumps(signature_file, indent=2))
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return True
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# move current to history
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signature_file["history"].insert(0, current)
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# create new current
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signature_file["current"] = make_signature_info(merkle_root, None)
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return True
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def generate_all_blobs(rewrite_version: bool) -> list[translations.TranslationsBlob]:
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order = translations.order_from_json(json.loads((HERE / "order.json").read_text()))
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fonts_dir = HERE / "fonts"
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current_version = _version_from_version_h()
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current_version_str = ".".join(str(v) for v in current_version)
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common_version = None
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all_languages = [lang_file.stem for lang_file in HERE.glob("??.json")]
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all_blobs: list[translations.TranslationsBlob] = []
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for lang in all_languages:
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if lang == "en":
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continue
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for model in ALL_MODELS:
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try:
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blob_json = json.loads((HERE / f"{lang}.json").read_text())
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blob_version = translations.version_from_json(
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blob_json["header"]["version"]
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)
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if rewrite_version:
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version = current_version
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if blob_version != current_version:
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blob_json["header"]["version"] = current_version_str
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(HERE / f"{lang}.json").write_text(
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json.dumps(blob_json, indent=2) + "\n"
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)
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else:
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version = blob_version
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if common_version is None:
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common_version = version
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elif blob_version != common_version:
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raise ValueError(
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f"Language {lang} has version {version} but expected {common_version}"
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)
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blob = translations.blob_from_defs(
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blob_json, order, model, version, fonts_dir
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)
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all_blobs.append(blob)
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except Exception as e:
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import traceback
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traceback.print_exc()
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LOG.warning(f"Failed to build {lang} for {model.internal_name}: {e}")
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continue
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LOG.info(f"Built {lang} for {model.internal_name}")
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return all_blobs
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def build_all_blobs(
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all_blobs: list[translations.TranslationsBlob],
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merkle_tree: merkle_tree.MerkleTree,
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sigmask: int,
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signature: bytes,
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production: bool = False,
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) -> None:
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for blob in all_blobs:
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proof = translations.Proof(
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merkle_proof=merkle_tree.get_proof(blob.header_bytes),
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signature=signature,
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sigmask=sigmask,
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)
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blob.proof = proof
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header = blob.header
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model = header.model.value.decode("ascii")
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version = ".".join(str(v) for v in header.firmware_version[:3])
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if production:
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suffix = ""
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else:
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suffix = "-unsigned"
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filename = f"translation-{model}-{header.language}-{version}{suffix}.bin"
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(HERE / filename).write_bytes(blob.build())
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LOG.info(f"Wrote {header.language} for {model} v{version}: {filename}")
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@click.group()
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def cli() -> None:
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pass
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@cli.command()
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def gen() -> None:
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"""Generate all language blobs for all models.
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The generated blobs will be signed with the development keys.
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"""
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all_blobs = generate_all_blobs(rewrite_version=True)
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tree = merkle_tree.MerkleTree(b.header_bytes for b in all_blobs)
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root = tree.get_root_hash()
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signature = cosi.sign_with_privkeys(root, PRIVATE_KEYS_DEV)
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sigmask = 0b111
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build_all_blobs(all_blobs, tree, sigmask, signature)
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signature_file = json.loads(SIGNATURES_JSON.read_text())
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if update_merkle_root(signature_file, root):
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SIGNATURES_JSON.write_text(json.dumps(signature_file, indent=2) + "\n")
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click.echo("Updated signatures.json")
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else:
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click.echo("signatures.json is already up-to-date")
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@cli.command()
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def merkle_root() -> None:
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"""Print the Merkle root of all language blobs."""
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all_blobs = generate_all_blobs(rewrite_version=False)
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tree = merkle_tree.MerkleTree(b.header_bytes for b in all_blobs)
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root = tree.get_root_hash()
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signature_file: SignatureFile = json.loads(SIGNATURES_JSON.read_text())
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if signature_file["current"]["merkle_root"] != root.hex():
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raise click.ClickException(
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f"Merkle root mismatch!\n"
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f"Expected: {root.hex()}\n"
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f"Stored in signatures.json: {signature_file['current']['merkle_root']}\n"
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"Run `cli.py gen` to update the stored Merkle root."
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)
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click.echo(root.hex())
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@cli.command()
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@click.argument("signature_hex", required=False)
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@click.option("--force", is_flag=True)
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def sign(signature_hex: str | None, force: bool) -> None:
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"""Insert a signature into language blobs.
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If signature_hex is not provided, the signature will be located in signatures.json.
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"""
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all_blobs = generate_all_blobs(rewrite_version=False)
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tree = merkle_tree.MerkleTree(b.header_bytes for b in all_blobs)
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root = tree.get_root_hash()
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signature_file: SignatureFile = json.loads(SIGNATURES_JSON.read_text())
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if signature_file["current"]["merkle_root"] != root.hex():
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raise click.ClickException(
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f"Merkle root mismatch!\n"
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f"Expected: {root.hex()}\n"
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f"Stored in signatures.json: {signature_file['current']['merkle_root']}"
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)
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if signature_hex is None:
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if signature_file["current"]["signature"] is None:
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raise click.ClickException("Please provide a signature.")
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signature_hex = signature_file["current"]["signature"]
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elif (
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not force
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and signature_file["current"]["signature"] is not None
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and signature_file["current"]["signature"] != signature_hex
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):
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raise click.ClickException(
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"A different signature is already present in signatures.json\n"
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"Use --force to overwrite it."
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)
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else:
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# Update signature file data. It will be written only if the signature verifies.
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signature_file["current"]["signature"] = signature_hex
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signature_file["current"]["datetime"] = datetime.datetime.utcnow().isoformat()
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signature_bytes = bytes.fromhex(signature_hex)
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sigmask, signature = signature_bytes[0], signature_bytes[1:]
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try:
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cosi.verify(signature, root, 2, PUBLIC_KEYS_PROD, sigmask)
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except Exception as e:
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if force:
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LOG.warning(f"Invalid signature: {e}. --force is provided, writing anyway.")
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pass
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else:
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raise click.ClickException(f"Invalid signature: {e}") from e
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SIGNATURES_JSON.write_text(json.dumps(signature_file, indent=2) + "\n")
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build_all_blobs(all_blobs, tree, sigmask, signature, production=True)
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if __name__ == "__main__":
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cli()
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