def eth_sign_msg(
self, msg: bytes, keypath: Sequence[int], coin: eth.ETHCoin = eth.ETH
) -> bytes:
"""
Signs message, the msg will be prefixed with "\x19Ethereum message\n" + len(msg) in the
hardware
"""
request = eth.ETHRequest()
# pylint: disable=no-member
request.sign_msg.CopyFrom(eth.ETHSignMessageRequest(coin=coin, keypath=keypath, msg=msg))
supports_antiklepto = self.version >= semver.VersionInfo(9, 5, 0)
if supports_antiklepto:
host_nonce = os.urandom(32)
request.sign_msg.host_nonce_commitment.commitment = antiklepto_host_commit(host_nonce)
signer_commitment = self._eth_msg_query(
request, expected_response="antiklepto_signer_commitment"
).antiklepto_signer_commitment.commitment
request = eth.ETHRequest()
request.antiklepto_signature.CopyFrom(
antiklepto.AntiKleptoSignatureRequest(host_nonce=host_nonce)
)
signature = self._eth_msg_query(request, expected_response="sign").sign.signature
antiklepto_verify(host_nonce, signer_commitment, signature[:64])
if self.debug:
print(f"Antiklepto nonce verification PASSED")
return signature
return self._eth_msg_query(request, expected_response="sign").sign.signature
def eth_sign_msg(self, msg: bytes, keypath: List[int], coin: eth.ETHCoin = eth.ETH) -> bytes:
"""
Signs message, the msg will be prefixed with "\x19Ethereum message\n" + len(msg) in the
hardware
"""
request = eth.ETHRequest()
# pylint: disable=no-member
request.sign_msg.CopyFrom(eth.ETHSignMessageRequest(coin=coin, keypath=keypath, msg=msg))
return self._eth_msg_query(request, expected_response="sign").sign.signature
def eth_sign_msg(self,
msg: bytes,
keypath: Sequence[int],
chain_id: int = 1) -> bytes:
"""
Signs message, the msg will be prefixed with "\x19Ethereum message\n" + len(msg) in the
hardware. 27 is added to the recID to denote an uncompressed pubkey.
"""
def format_as_uncompressed(sig: bytes) -> bytes:
# 27 is the magic constant to add to the recoverable ID to denote an uncompressed
# pubkey.
modified_signature = list(sig)
modified_signature[64] += 27
return bytes(modified_signature)
request = eth.ETHRequest()
# pylint: disable=no-member
request.sign_msg.CopyFrom(
eth.ETHSignMessageRequest(coin=self._eth_coin(chain_id),
chain_id=chain_id,
keypath=keypath,
msg=msg))
supports_antiklepto = self.version >= semver.VersionInfo(9, 5, 0)
if supports_antiklepto:
host_nonce = os.urandom(32)
request.sign_msg.host_nonce_commitment.commitment = antiklepto_host_commit(
host_nonce)
signer_commitment = self._eth_msg_query(
request, expected_response="antiklepto_signer_commitment"
).antiklepto_signer_commitment.commitment
request = eth.ETHRequest()
request.antiklepto_signature.CopyFrom(
antiklepto.AntiKleptoSignatureRequest(host_nonce=host_nonce))
signature = self._eth_msg_query(
request, expected_response="sign").sign.signature
antiklepto_verify(host_nonce, signer_commitment, signature[:64])
if self.debug:
print("Antiklepto nonce verification PASSED")
return format_as_uncompressed(signature)
signature = self._eth_msg_query(
request, expected_response="sign").sign.signature
return format_as_uncompressed(signature)