35 lines
1.0 KiB
Python
35 lines
1.0 KiB
Python
from trezor.utils import unimport
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def message_digest(message):
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from apps.wallet.sign_tx.signing import write_varint
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from trezor.crypto.hashlib import sha3_256
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from apps.common.hash_writer import HashWriter
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h = HashWriter(sha3_256)
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signed_message_header = 'Ethereum Signed Message:\n'
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write_varint(h, len(signed_message_header))
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h.extend(signed_message_header)
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write_varint(h, len(message))
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h.extend(message)
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return h.get_digest(True)
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@unimport
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async def ethereum_sign_message(ctx, msg):
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from trezor.messages.EthereumMessageSignature import EthereumMessageSignature
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from trezor.crypto.curve import secp256k1
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from ..common import seed
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address_n = msg.address_n or ()
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node = await seed.get_root(ctx)
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node.derive_path(address_n)
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signature = secp256k1.sign(node.private_key(), message_digest(msg.message), False)
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sig = EthereumMessageSignature()
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sig.address = node.ethereum_pubkeyhash()
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sig.signature = signature[1:] + bytearray([signature[0]])
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return sig
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