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93 lines
3.1 KiB
93 lines
3.1 KiB
4 years ago
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from ubinascii import hexlify
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from trezor import ui, wire
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from trezor.messages.GetOwnershipProof import GetOwnershipProof
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from trezor.messages.OwnershipProof import OwnershipProof
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from trezor.ui.text import Text
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from apps.common import coininfo
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from apps.common.confirm import require_confirm
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from apps.common.paths import validate_path
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from . import addresses, common, scripts
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from .keychain import with_keychain
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from .ownership import generate_proof, get_identifier
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if False:
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from apps.common.seed import Keychain
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# Maximum number of characters per line in monospace font.
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_MAX_MONO_LINE = 18
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@with_keychain
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async def get_ownership_proof(
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ctx, msg: GetOwnershipProof, keychain: Keychain, coin: coininfo.CoinInfo
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) -> OwnershipProof:
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await validate_path(
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ctx,
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addresses.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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)
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if msg.script_type not in common.INTERNAL_INPUT_SCRIPT_TYPES:
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raise wire.DataError("Invalid script type")
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if msg.script_type in common.SEGWIT_INPUT_SCRIPT_TYPES and not coin.segwit:
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raise wire.DataError("Segwit not enabled on this coin")
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node = keychain.derive(msg.address_n)
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address = addresses.get_address(msg.script_type, coin, node, msg.multisig)
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script_pubkey = scripts.output_derive_script(address, coin)
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ownership_id = get_identifier(script_pubkey, keychain)
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# If the scriptPubKey is multisig, then the caller has to provide
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# ownership IDs, otherwise providing an ID is optional.
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if msg.multisig:
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if ownership_id not in msg.ownership_ids:
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raise wire.DataError("Missing ownership identifier")
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elif msg.ownership_ids:
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if msg.ownership_ids != [ownership_id]:
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raise wire.DataError("Invalid ownership identifier")
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else:
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msg.ownership_ids = [ownership_id]
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# In order to set the "user confirmation" bit in the proof, the user must actually confirm.
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if msg.user_confirmation:
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text = Text("Proof of ownership", ui.ICON_CONFIG)
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text.normal("Do you want to create a")
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if not msg.commitment_data:
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text.normal("proof of ownership?")
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else:
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hex_data = hexlify(msg.commitment_data).decode()
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text.normal("proof of ownership for:")
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if len(hex_data) > 3 * _MAX_MONO_LINE:
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text.mono(hex_data[0:_MAX_MONO_LINE])
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text.mono(
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hex_data[_MAX_MONO_LINE : 3 * _MAX_MONO_LINE // 2 - 1]
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+ "..."
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+ hex_data[-3 * _MAX_MONO_LINE // 2 + 2 : -_MAX_MONO_LINE]
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)
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text.mono(hex_data[-_MAX_MONO_LINE:])
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else:
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text.mono(hex_data)
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await require_confirm(ctx, text)
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ownership_proof, signature = generate_proof(
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node,
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msg.script_type,
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msg.multisig,
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coin,
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msg.user_confirmation,
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msg.ownership_ids,
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script_pubkey,
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msg.commitment_data,
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)
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return OwnershipProof(ownership_proof=ownership_proof, signature=signature)
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