mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-17 21:22:10 +00:00
63 lines
1.8 KiB
Python
63 lines
1.8 KiB
Python
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#!/usr/bin/env python3
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import typing as t
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from hashlib import sha256
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from pathlib import Path
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import click
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import ecdsa
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from trezorlib.firmware.legacy import LegacyV2Firmware
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from trezorlib.firmware.models import TREZOR_ONE_V3_DEV
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SECRET_KEYS = [
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ecdsa.SigningKey.from_string(bytes.fromhex(sk), curve=ecdsa.SECP256k1)
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for sk in (
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"ca8de06e1e93d101136fa6fbc41432c52b6530299dfe32808030ee8e679702f1",
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"dde47dd393f7d76f9b522bfa9760bc4543d2c3654491393774f54e066461fccb",
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"14ba98c5c5cb8f1b214c661f4046ec2288c34fe2e73e02f149ec3dd8dad07ae2",
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)
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]
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PUBLIC_KEYS: list[ecdsa.VerifyingKey] = [sk.get_verifying_key() for sk in SECRET_KEYS]
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# Should be these public keys
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assert [
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pk.to_string("compressed") for pk in PUBLIC_KEYS
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] == TREZOR_ONE_V3_DEV.firmware_keys
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def signmessage(digest: bytes, key: ecdsa.SigningKey) -> bytes:
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"""Sign via SignMessage"""
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btc_digest = b"\x18Bitcoin Signed Message:\n\x20" + digest
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final_digest = sha256(sha256(btc_digest).digest()).digest()
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return key.sign_digest_deterministic(final_digest, hashfunc=sha256)
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@click.command()
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@click.argument("firmware", type=click.File("rb"))
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@click.option("-i", "--index", "indices", type=int, multiple=True)
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def cli(firmware: click.utils.LazyFile, indices: t.Sequence[int]) -> None:
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fw = LegacyV2Firmware.parse(firmware.read())
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if not indices:
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indices = [1, 2]
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if len(indices) > 3:
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raise click.ClickException("Too many indices")
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digest = fw.digest()
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for i, idx in enumerate(indices):
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sk = SECRET_KEYS[idx - 1]
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sig = signmessage(digest, sk)
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fw.header.v1_key_indexes[i] = idx
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fw.header.v1_signatures[i] = sig
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new_fw = Path(firmware.name).with_suffix(".signed.bin")
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new_fw.write_bytes(fw.build())
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click.echo(f"Wrote signed firmware to {new_fw}")
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if __name__ == "__main__":
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cli()
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