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https://github.com/trezor/trezor-firmware.git
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46 lines
1.5 KiB
Python
46 lines
1.5 KiB
Python
from trezor.crypto.curve import ed25519
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from trezor.crypto.hashlib import sha256
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from trezor.messages.LiskMessageSignature import LiskMessageSignature
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from trezor.ui.text import Text
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from trezor.utils import HashWriter
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from .helpers import LISK_CURVE, validate_full_path
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from apps.common import paths, 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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from apps.wallet.sign_tx.writers import write_varint
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def message_digest(message):
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h = HashWriter(sha256())
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signed_message_header = "Lisk 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 sha256(h.get_digest()).digest()
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async def sign_message(ctx, msg):
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keychain = await seed.get_keychain(ctx)
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await paths.validate_path(ctx, validate_full_path, path=msg.address_n)
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await require_confirm_sign_message(ctx, msg.message)
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node = keychain.derive(msg.address_n, LISK_CURVE)
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seckey = node.private_key()
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pubkey = node.public_key()
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pubkey = pubkey[1:] # skip ed25519 pubkey marker
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signature = ed25519.sign(seckey, message_digest(msg.message))
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return LiskMessageSignature(public_key=pubkey, signature=signature)
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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 Lisk message", new_lines=False)
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text.normal(*message)
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await require_confirm(ctx, text)
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