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https://github.com/trezor/trezor-firmware.git
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48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
from trezor import wire
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from trezor.crypto.curve import secp256k1
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from trezor.messages.InputScriptType import SPENDADDRESS, SPENDP2SHWITNESS, SPENDWITNESS
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from trezor.messages.MessageSignature import MessageSignature
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from apps.common.paths import validate_path
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from apps.common.signverify import message_digest, require_confirm_sign_message
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from .addresses import get_address, validate_full_path
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from .keychain import with_keychain
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@with_keychain
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async def sign_message(ctx, msg, keychain, coin):
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message = msg.message
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address_n = msg.address_n
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script_type = msg.script_type or 0
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await require_confirm_sign_message(ctx, "Sign message", message)
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await validate_path(
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ctx,
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validate_full_path,
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keychain,
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msg.address_n,
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coin.curve_name,
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coin=coin,
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script_type=msg.script_type,
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validate_script_type=False,
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)
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node = keychain.derive(address_n)
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seckey = node.private_key()
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address = get_address(script_type, coin, node)
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digest = message_digest(coin, message)
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signature = secp256k1.sign(seckey, digest)
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if script_type == SPENDADDRESS:
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pass
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elif script_type == SPENDP2SHWITNESS:
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signature = bytes([signature[0] + 4]) + signature[1:]
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elif script_type == SPENDWITNESS:
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signature = bytes([signature[0] + 8]) + signature[1:]
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else:
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raise wire.ProcessError("Unsupported script type")
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return MessageSignature(address=address, signature=signature)
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