def load_device_by_mnemonic(self,
mnemonic,
pin,
passphrase_protection,
label,
language,
skip_checksum=False):
m = Mnemonic('english')
if not skip_checksum and not m.check(mnemonic):
raise Exception("Invalid mnemonic checksum")
# Convert mnemonic to UTF8 NKFD
mnemonic = Mnemonic.normalize_string(mnemonic)
# Convert mnemonic to ASCII stream
mnemonic = unicode(str(bytearray(mnemonic, 'utf-8')), 'utf-8')
if self.features.initialized:
raise Exception(
"Device is initialized already. Call wipe_device() and try again."
)
resp = self.call(
proto.LoadDevice(mnemonic=mnemonic,
pin=pin,
passphrase_protection=passphrase_protection,
language=language,
label=label,
skip_checksum=skip_checksum))
self.init_device()
return resp
def load_device_by_xprv(self, xprv, pin, passphrase_protection, label,
language):
if self.features.initialized:
raise Exception(
"Device is initialized already. Call wipe_device() and try again."
)
if xprv[0:4] not in ('xprv', 'tprv'):
raise Exception("Unknown type of xprv")
if len(xprv) < 100 and len(xprv) > 112:
raise Exception("Invalid length of xprv")
node = types.HDNodeType()
data = tools.b58decode(xprv, None).encode('hex')
if data[90:92] != '00':
raise Exception("Contain invalid private key")
checksum = hashlib.sha256(
hashlib.sha256(binascii.unhexlify(
data[:156])).digest()).hexdigest()[:8]
if checksum != data[156:]:
raise Exception("Checksum doesn't match")
# version 0488ade4
# depth 00
# fingerprint 00000000
# child_num 00000000
# chaincode 873dff81c02f525623fd1fe5167eac3a55a049de3d314bb42ee227ffed37d508
# privkey 00e8f32e723decf4051aefac8e2c93c9c5b214313817cdb01a1494b917c8436b35
# checksum e77e9d71
node.depth = int(data[8:10], 16)
node.fingerprint = int(data[10:18], 16)
node.child_num = int(data[18:26], 16)
node.chain_code = data[26:90].decode('hex')
node.private_key = data[92:156].decode(
'hex') # skip 0x00 indicating privkey
resp = self.call(
proto.LoadDevice(node=node,
pin=pin,
passphrase_protection=passphrase_protection,
language=language,
label=label))
self.init_device()
return resp