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https://github.com/trezor/trezor-firmware.git
synced 2025-07-02 04:42:33 +00:00
54 lines
1.6 KiB
Python
54 lines
1.6 KiB
Python
from trezor import log, ui, wire
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from trezor.crypto import bip32
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from trezor.crypto.curve import ed25519
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from trezor.messages.CardanoMessageSignature import CardanoMessageSignature
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from .address import derive_address_and_node, validate_full_path
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from .layout import confirm_with_pagination
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from apps.common import paths, seed, storage
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async def sign_message(ctx, msg):
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await paths.validate_path(ctx, validate_full_path, path=msg.address_n)
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mnemonic = storage.get_mnemonic()
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root_node = bip32.from_mnemonic_cardano(mnemonic)
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try:
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signature = _sign_message(root_node, msg.message, msg.address_n)
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except ValueError as e:
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if __debug__:
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log.exception(__name__, e)
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raise wire.ProcessError("Signing failed")
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mnemonic = None
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root_node = None
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if not await confirm_with_pagination(
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ctx, msg.message, "Signing message", ui.ICON_RECEIVE, ui.GREEN
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):
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raise wire.ActionCancelled("Signing cancelled")
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if not await confirm_with_pagination(
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ctx,
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paths.break_address_n_to_lines(msg.address_n),
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"With address",
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ui.ICON_RECEIVE,
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ui.GREEN,
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):
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raise wire.ActionCancelled("Signing cancelled")
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return signature
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def _sign_message(root_node, message: str, derivation_path: list):
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address, node = derive_address_and_node(root_node, derivation_path)
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signature = ed25519.sign_ext(node.private_key(), node.private_key_ext(), message)
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sig = CardanoMessageSignature()
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sig.public_key = seed.remove_ed25519_prefix(node.public_key())
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sig.signature = signature
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return sig
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