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ethereum: implement checksum in ethereum_get_address

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This commit is contained in:
Pavol Rusnak 2017-12-04 19:28:40 +01:00
parent 69d030a8fa
commit 18fcf826d6
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GPG Key ID: 91F3B339B9A02A3D
1 changed files with 33 additions and 6 deletions
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39
src/apps/ethereum/ethereum_get_address.py
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@ -9,8 +9,10 @@ async def layout_ethereum_get_address(ctx, msg):
from trezor.crypto.hashlib import sha3_256
from ..common import seed
address_n = msg.address_n or ()
node = await seed.get_root(ctx)
node.derive_path(msg.address_n or ())
node.derive_path(address_n)
seckey = node.private_key()
public_key = secp256k1.publickey(seckey, False) # uncompressed
@ -18,21 +20,46 @@ async def layout_ethereum_get_address(ctx, msg):
if msg.show_display:
await _show_address(ctx, address)
return EthereumAddress(address=address)
async def _show_address(ctx, address):
from trezor.messages.ButtonRequestType import Address
from trezor.ui.text import Text
from trezor.ui.qr import Qr
from trezor.ui.container import Container
from ..common.confirm import require_confirm
# TODO: qr code
content = Text('Confirm address', ui.ICON_RESET,
ui.MONO, *_split_address(address))
address = _ethereum_address_hex(address)
lines = _split_address(address)
content = Container(
Qr(address, (120, 135), 3),
Text('Confirm address', ui.ICON_RESET, ui.MONO, *lines))
await require_confirm(ctx, content, code=Address)
def _split_address(address):
from trezor.utils import chunks
return chunks(address, 20)
return chunks(address, 21)
def _ethereum_address_hex(address):
from ubinascii import hexlify
from trezor.crypto.hashlib import sha3_256
hx = hexlify(address).decode()
hs = sha3_256(hx).digest(True)
h = ''
for i in range(20):
l = hx[i * 2]
if hs[i] & 0x80 and l >= 'a' and l <= 'f':
l = l.upper()
h += l
l = hx[i * 2 + 1]
if hs[i] & 0x08 and l >= 'a' and l <= 'f':
l = l.upper()
h += l
return '0x' + h