Pavol Rusnak
1 year ago
parent
e612d58f36
commit
bca916402b
@ -1,167 +0,0 @@
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#!/usr/bin/env python3
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import sys
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import traceback
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import click
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import Pyro4
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from trezorlib import cosi
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from trezorlib.client import get_default_client
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from trezorlib.tools import parse_path
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from trezorlib._internal.firmware_headers import (
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parse_image,
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VendorHeader,
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BootloaderImage,
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FirmwareImage,
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)
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from typing import Tuple
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Pyro4.config.SERIALIZER = "marshal"
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PORT = 5001
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indexmap = {
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"bootloader": BootloaderImage,
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"vendorheader": VendorHeader,
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"firmware": FirmwareImage,
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}
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PATH = "10018h/{}h"
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TREZOR = None
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def make_commit(image_type, digest, public_keys):
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path = PATH.format(image_type.BIP32_INDEX)
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address_n = parse_path(path)
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# device information - show only first time
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click.echo(
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"\nUsing device {} ".format(click.style(TREZOR.features.label, bold=True)) +
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"at path {}".format(TREZOR.transport.get_path())
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)
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while True:
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# signing information - repeat every time
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click.echo("Commiting to {} hash:".format(click.style(image_type.NAME, bold=True)))
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for partid in range(4):
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digest_part = digest[partid * 8 : (partid + 1) * 8]
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color = "red" if partid % 2 else "cyan"
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digest_str = click.style(digest_part.hex().upper(), fg=color)
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click.echo("\t" + digest_str)
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click.echo("Using path: {}".format(click.style(path, bold=True)))
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try:
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commit = cosi.commit(TREZOR, address_n, digest)
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if public_keys is not None and commit.pubkey not in public_keys:
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click.echo("\n\nPublic key {} is unknown.".format(commit.pubkey.hex()))
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if click.confirm("Retry with a different passphrase?", default=True):
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TREZOR.init_device()
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continue
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return commit.pubkey, commit.commitment
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except Exception as e:
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click.echo(e)
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traceback.print_exc()
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click.echo("Trying again ...\n\n")
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@Pyro4.expose
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class KeyctlProxy:
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def __init__(
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self, daemon, image_type, digest: bytes, commit: Tuple[bytes, bytes]
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) -> None:
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self.daemon = daemon
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self.name = image_type.NAME
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self.address_n = parse_path(PATH.format(image_type.BIP32_INDEX))
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self.digest = digest
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self.commit = commit
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self.signature = None
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self.global_params = None
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def _check_name_digest(self, name, digest):
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if name != self.name or digest != self.digest:
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click.echo("ERROR! Remote wants to sign {} with digest {}".format(name, digest.hex()))
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click.echo("Expected: {} with digest {}".format(self.name, self.digest.hex()))
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raise ValueError("Unexpected index/digest")
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def get_commit(self, name, digest):
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self._check_name_digest(name, digest)
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click.echo("Sending commitment!")
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return self.commit
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def _make_signature(self, global_R, global_pk):
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while True:
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try:
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click.echo("\n\n\nSigning...")
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signature = cosi.sign(
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TREZOR, self.address_n, self.digest, global_R, global_pk
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)
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return signature.signature
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except Exception as e:
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click.echo(e)
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traceback.print_exc()
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click.echo("Trying again ...")
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def get_signature(self, name, digest, global_R, global_pk):
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self._check_name_digest(name, digest)
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global_params = global_R, global_pk
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if global_params != self.global_params:
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self.signature = self._make_signature(global_R, global_pk)
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self.global_params = global_params
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click.echo("Sending signature!")
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return self.signature
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@Pyro4.oneway
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def finish(self):
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click.echo("Done! \\(^o^)/")
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self.daemon.shutdown()
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@click.command()
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@click.option(
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"-l", "--listen", "ipaddr", default="0.0.0.0", help="Bind to particular ip address"
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)
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@click.option("-t", "--image-type", type=click.Choice(indexmap.keys()))
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@click.option("-d", "--digest")
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@click.argument("fw_file", type=click.File("rb"), required=False)
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def cli(ipaddr, fw_file, image_type, digest):
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"""Participate in signing of firmware.
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Specify either fw_file to auto-detect type and digest, or use -t and -d to specify
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the type and digest manually.
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"""
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global TREZOR
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public_keys = None
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if fw_file:
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if image_type or digest:
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raise click.ClickException("Do not specify fw_file together with -t/-d")
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image_type = parse_image(fw_file.read())
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digest = image_type.digest()
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public_keys = image_type.public_keys
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click.echo(image_type.format())
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if not fw_file and (not image_type or not digest):
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raise click.ClickException("Please specify either fw_file or -t and -d")
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try:
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TREZOR = get_default_client()
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TREZOR.ui.always_prompt = True
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except Exception as e:
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raise click.ClickException("Please connect a Trezor and retry.") from e
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pubkey, R = make_commit(image_type, digest, public_keys)
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daemon = Pyro4.Daemon(host=ipaddr, port=PORT)
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proxy = KeyctlProxy(daemon, image_type, digest, (pubkey, R))
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uri = daemon.register(proxy, "keyctl")
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click.echo("keyctl-proxy running at URI: {}".format(uri))
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click.echo("Press Ctrl+C to abort.")
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daemon.requestLoop()
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if __name__ == "__main__":
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cli()
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