mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-18 13:38:12 +00:00
252 lines
7.1 KiB
Python
252 lines
7.1 KiB
Python
# This file is part of the Trezor project.
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#
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# Copyright (C) 2012-2018 SatoshiLabs and contributors
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#
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# This library is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version 3
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# as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the License along with this library.
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# If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
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from mnemonic import Mnemonic
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from . import messages as proto, tools
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from .tools import expect
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def pin_info(pin):
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print("Device asks for PIN %s" % pin)
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def button_press(yes_no):
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print("User pressed", '"y"' if yes_no else '"n"')
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class DebugLink(object):
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def __init__(self, transport, pin_func=pin_info, button_func=button_press):
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self.transport = transport
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self.transport.session_begin()
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self.pin_func = pin_func
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self.button_func = button_func
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def close(self):
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self.transport.session_end()
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def _call(self, msg, nowait=False):
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self.transport.write(msg)
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if nowait:
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return None
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ret = self.transport.read()
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return ret
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def read_pin(self):
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obj = self._call(proto.DebugLinkGetState())
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print("Read PIN:", obj.pin)
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print("Read matrix:", obj.matrix)
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return (obj.pin, obj.matrix)
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def read_pin_encoded(self):
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pin, _ = self.read_pin()
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pin_encoded = self.encode_pin(pin)
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self.pin_func(pin_encoded)
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return pin_encoded
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def encode_pin(self, pin):
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_, matrix = self.read_pin()
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# Now we have real PIN and PIN matrix.
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# We have to encode that into encoded pin,
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# because application must send back positions
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# on keypad, not a real PIN.
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pin_encoded = "".join([str(matrix.index(p) + 1) for p in pin])
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print("Encoded PIN:", pin_encoded)
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return pin_encoded
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def read_layout(self):
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obj = self._call(proto.DebugLinkGetState())
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return obj.layout
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def read_mnemonic(self):
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obj = self._call(proto.DebugLinkGetState())
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return obj.mnemonic
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def read_node(self):
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obj = self._call(proto.DebugLinkGetState())
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return obj.node
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def read_recovery_word(self):
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obj = self._call(proto.DebugLinkGetState())
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return (obj.recovery_fake_word, obj.recovery_word_pos)
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def read_reset_word(self):
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obj = self._call(proto.DebugLinkGetState())
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return obj.reset_word
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def read_reset_word_pos(self):
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obj = self._call(proto.DebugLinkGetState())
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return obj.reset_word_pos
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def read_reset_entropy(self):
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obj = self._call(proto.DebugLinkGetState())
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return obj.reset_entropy
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def read_passphrase_protection(self):
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obj = self._call(proto.DebugLinkGetState())
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return obj.passphrase_protection
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def press_button(self, yes_no):
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print("Pressing", yes_no)
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self.button_func(yes_no)
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self._call(proto.DebugLinkDecision(yes_no=yes_no), nowait=True)
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def press_yes(self):
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self.press_button(True)
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def press_no(self):
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self.press_button(False)
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def swipe(self, up_down):
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print("Swiping", up_down)
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self._call(proto.DebugLinkDecision(up_down=up_down), nowait=True)
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def swipe_up(self):
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self.swipe(True)
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def swipe_down(self):
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self.swipe(False)
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def input(self, text):
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self._call(proto.DebugLinkDecision(input=text), nowait=True)
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def stop(self):
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self._call(proto.DebugLinkStop(), nowait=True)
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def memory_read(self, address, length):
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obj = self._call(proto.DebugLinkMemoryRead(address=address, length=length))
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return obj.memory
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def memory_write(self, address, memory, flash=False):
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self._call(
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proto.DebugLinkMemoryWrite(address=address, memory=memory, flash=flash),
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nowait=True,
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)
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def flash_erase(self, sector):
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self._call(proto.DebugLinkFlashErase(sector=sector), nowait=True)
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@expect(proto.Success, field="message")
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def load_device_by_mnemonic(
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client,
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mnemonic,
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pin,
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passphrase_protection,
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label,
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language="english",
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skip_checksum=False,
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expand=False,
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):
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# Convert mnemonic to UTF8 NKFD
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mnemonic = Mnemonic.normalize_string(mnemonic)
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# Convert mnemonic to ASCII stream
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mnemonic = mnemonic.encode()
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m = Mnemonic("english")
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if expand:
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mnemonic = m.expand(mnemonic)
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if not skip_checksum and not m.check(mnemonic):
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raise ValueError("Invalid mnemonic checksum")
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if client.features.initialized:
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raise RuntimeError(
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"Device is initialized already. Call wipe_device() and try again."
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)
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resp = client.call(
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proto.LoadDevice(
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mnemonic=mnemonic,
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pin=pin,
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passphrase_protection=passphrase_protection,
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language=language,
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label=label,
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skip_checksum=skip_checksum,
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)
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)
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client.init_device()
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return resp
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@expect(proto.Success, field="message")
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def load_device_by_xprv(client, xprv, pin, passphrase_protection, label, language):
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if client.features.initialized:
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raise RuntimeError(
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"Device is initialized already. Call wipe_device() and try again."
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)
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if xprv[0:4] not in ("xprv", "tprv"):
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raise ValueError("Unknown type of xprv")
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if not 100 < len(xprv) < 112: # yes this is correct in Python
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raise ValueError("Invalid length of xprv")
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node = proto.HDNodeType()
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data = tools.b58decode(xprv, None).hex()
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if data[90:92] != "00":
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raise ValueError("Contain invalid private key")
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checksum = (tools.btc_hash(bytes.fromhex(data[:156]))[:4]).hex()
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if checksum != data[156:]:
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raise ValueError("Checksum doesn't match")
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# version 0488ade4
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# depth 00
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# fingerprint 00000000
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# child_num 00000000
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# chaincode 873dff81c02f525623fd1fe5167eac3a55a049de3d314bb42ee227ffed37d508
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# privkey 00e8f32e723decf4051aefac8e2c93c9c5b214313817cdb01a1494b917c8436b35
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# checksum e77e9d71
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node.depth = int(data[8:10], 16)
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node.fingerprint = int(data[10:18], 16)
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node.child_num = int(data[18:26], 16)
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node.chain_code = bytes.fromhex(data[26:90])
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node.private_key = bytes.fromhex(data[92:156]) # skip 0x00 indicating privkey
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resp = client.call(
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proto.LoadDevice(
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node=node,
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pin=pin,
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passphrase_protection=passphrase_protection,
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language=language,
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label=label,
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)
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)
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client.init_device()
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return resp
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@expect(proto.Success, field="message")
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def self_test(client):
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if client.features.bootloader_mode is not True:
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raise RuntimeError("Device must be in bootloader mode")
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return client.call(
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proto.SelfTest(
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payload=b"\x00\xFF\x55\xAA\x66\x99\x33\xCCABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789!\x00\xFF\x55\xAA\x66\x99\x33\xCC"
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)
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)
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