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mirror of https://github.com/trezor/trezor-firmware.git synced 2024-11-24 00:18:26 +00:00
trezor-firmware/trezorlib/debuglink.py
2018-09-06 16:22:38 +02:00

253 lines
7.2 KiB
Python

# This file is part of the Trezor project.
#
# Copyright (C) 2012-2018 SatoshiLabs and contributors
#
# This library is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License version 3
# as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the License along with this library.
# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
import binascii
from mnemonic import Mnemonic
from . import messages as proto, tools
from .tools import expect
def pin_info(pin):
print("Device asks for PIN %s" % pin)
def button_press(yes_no):
print("User pressed", '"y"' if yes_no else '"n"')
class DebugLink(object):
def __init__(self, transport, pin_func=pin_info, button_func=button_press):
self.transport = transport
self.transport.session_begin()
self.pin_func = pin_func
self.button_func = button_func
def close(self):
self.transport.session_end()
def _call(self, msg, nowait=False):
self.transport.write(msg)
if nowait:
return None
ret = self.transport.read()
return ret
def read_pin(self):
obj = self._call(proto.DebugLinkGetState())
print("Read PIN:", obj.pin)
print("Read matrix:", obj.matrix)
return (obj.pin, obj.matrix)
def read_pin_encoded(self):
pin, _ = self.read_pin()
pin_encoded = self.encode_pin(pin)
self.pin_func(pin_encoded)
return pin_encoded
def encode_pin(self, pin):
_, matrix = self.read_pin()
# Now we have real PIN and PIN matrix.
# We have to encode that into encoded pin,
# because application must send back positions
# on keypad, not a real PIN.
pin_encoded = "".join([str(matrix.index(p) + 1) for p in pin])
print("Encoded PIN:", pin_encoded)
return pin_encoded
def read_layout(self):
obj = self._call(proto.DebugLinkGetState())
return obj.layout
def read_mnemonic(self):
obj = self._call(proto.DebugLinkGetState())
return obj.mnemonic
def read_node(self):
obj = self._call(proto.DebugLinkGetState())
return obj.node
def read_recovery_word(self):
obj = self._call(proto.DebugLinkGetState())
return (obj.recovery_fake_word, obj.recovery_word_pos)
def read_reset_word(self):
obj = self._call(proto.DebugLinkGetState())
return obj.reset_word
def read_reset_word_pos(self):
obj = self._call(proto.DebugLinkGetState())
return obj.reset_word_pos
def read_reset_entropy(self):
obj = self._call(proto.DebugLinkGetState())
return obj.reset_entropy
def read_passphrase_protection(self):
obj = self._call(proto.DebugLinkGetState())
return obj.passphrase_protection
def press_button(self, yes_no):
print("Pressing", yes_no)
self.button_func(yes_no)
self._call(proto.DebugLinkDecision(yes_no=yes_no), nowait=True)
def press_yes(self):
self.press_button(True)
def press_no(self):
self.press_button(False)
def swipe(self, up_down):
print("Swiping", up_down)
self._call(proto.DebugLinkDecision(up_down=up_down), nowait=True)
def swipe_up(self):
self.swipe(True)
def swipe_down(self):
self.swipe(False)
def input(self, text):
self._call(proto.DebugLinkDecision(input=text), nowait=True)
def stop(self):
self._call(proto.DebugLinkStop(), nowait=True)
def memory_read(self, address, length):
obj = self._call(proto.DebugLinkMemoryRead(address=address, length=length))
return obj.memory
def memory_write(self, address, memory, flash=False):
self._call(
proto.DebugLinkMemoryWrite(address=address, memory=memory, flash=flash),
nowait=True,
)
def flash_erase(self, sector):
self._call(proto.DebugLinkFlashErase(sector=sector), nowait=True)
@expect(proto.Success, field="message")
def load_device_by_mnemonic(
client,
mnemonic,
pin,
passphrase_protection,
label,
language="english",
skip_checksum=False,
expand=False,
):
# Convert mnemonic to UTF8 NKFD
mnemonic = Mnemonic.normalize_string(mnemonic)
# Convert mnemonic to ASCII stream
mnemonic = mnemonic.encode()
m = Mnemonic("english")
if expand:
mnemonic = m.expand(mnemonic)
if not skip_checksum and not m.check(mnemonic):
raise ValueError("Invalid mnemonic checksum")
if client.features.initialized:
raise RuntimeError(
"Device is initialized already. Call wipe_device() and try again."
)
resp = client.call(
proto.LoadDevice(
mnemonic=mnemonic,
pin=pin,
passphrase_protection=passphrase_protection,
language=language,
label=label,
skip_checksum=skip_checksum,
)
)
client.init_device()
return resp
@expect(proto.Success, field="message")
def load_device_by_xprv(client, xprv, pin, passphrase_protection, label, language):
if client.features.initialized:
raise RuntimeError(
"Device is initialized already. Call wipe_device() and try again."
)
if xprv[0:4] not in ("xprv", "tprv"):
raise ValueError("Unknown type of xprv")
if not 100 < len(xprv) < 112: # yes this is correct in Python
raise ValueError("Invalid length of xprv")
node = proto.HDNodeType()
data = binascii.hexlify(tools.b58decode(xprv, None))
if data[90:92] != b"00":
raise ValueError("Contain invalid private key")
checksum = binascii.hexlify(tools.btc_hash(binascii.unhexlify(data[:156]))[:4])
if checksum != data[156:]:
raise ValueError("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 = binascii.unhexlify(data[26:90])
node.private_key = binascii.unhexlify(data[92:156]) # skip 0x00 indicating privkey
resp = client.call(
proto.LoadDevice(
node=node,
pin=pin,
passphrase_protection=passphrase_protection,
language=language,
label=label,
)
)
client.init_device()
return resp
@expect(proto.Success, field="message")
def self_test(client):
if client.features.bootloader_mode is not True:
raise RuntimeError("Device must be in bootloader mode")
return client.call(
proto.SelfTest(
payload=b"\x00\xFF\x55\xAA\x66\x99\x33\xCCABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!\x00\xFF\x55\xAA\x66\x99\x33\xCC"
)
)