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40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
from trezor.crypto.curve import secp256k1
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from trezor.crypto.hashlib import sha3_256
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from trezor.messages.EthereumMessageSignature import EthereumMessageSignature
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from trezor.ui.text import Text
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from trezor.utils import HashWriter
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from apps.common import seed
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from apps.common.confirm import require_confirm
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from apps.common.signverify import split_message
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def message_digest(message):
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h = HashWriter(sha3_256, keccak=True)
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signed_message_header = "\x19Ethereum Signed Message:\n"
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h.extend(signed_message_header)
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h.extend(str(len(message)))
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h.extend(message)
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return h.get_digest()
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async def sign_message(ctx, msg):
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await require_confirm_sign_message(ctx, msg.message)
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address_n = msg.address_n or ()
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node = await seed.derive_node(ctx, 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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async def require_confirm_sign_message(ctx, message):
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message = split_message(message)
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text = Text("Sign ETH message")
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text.normal(*message)
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await require_confirm(ctx, text)
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