mirror of
https://github.com/trezor/trezor-firmware.git
synced 2024-11-22 15:38:11 +00:00
96 lines
2.9 KiB
Python
Executable File
96 lines
2.9 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
|
|
# This file is part of the Trezor project.
|
|
#
|
|
# Copyright (C) 2012-2022 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 hashlib
|
|
|
|
import mnemonic
|
|
|
|
__doc__ = """
|
|
Use this script to cross-check that Trezor generated valid
|
|
mnemonic sentence for given internal (Trezor-generated)
|
|
and external (computer-generated) entropy.
|
|
|
|
Keep in mind that you're entering secret information to this script.
|
|
Leaking of these information may lead to stealing your bitcoins
|
|
from your wallet! We strongly recommend to run this script only on
|
|
highly secured computer (ideally live linux distribution
|
|
without an internet connection).
|
|
"""
|
|
|
|
|
|
def generate_entropy(
|
|
strength: int, internal_entropy: bytes, external_entropy: bytes
|
|
) -> bytes:
|
|
"""
|
|
strength - length of produced seed. One of 128, 192, 256
|
|
random - binary stream of random data from external HRNG
|
|
"""
|
|
if strength not in (128, 192, 256):
|
|
raise ValueError("Invalid strength")
|
|
|
|
if not internal_entropy:
|
|
raise ValueError("Internal entropy is not provided")
|
|
|
|
if len(internal_entropy) < 32:
|
|
raise ValueError("Internal entropy too short")
|
|
|
|
if not external_entropy:
|
|
raise ValueError("External entropy is not provided")
|
|
|
|
if len(external_entropy) < 32:
|
|
raise ValueError("External entropy too short")
|
|
|
|
entropy = hashlib.sha256(internal_entropy + external_entropy).digest()
|
|
entropy_stripped = entropy[: strength // 8]
|
|
|
|
if len(entropy_stripped) * 8 != strength:
|
|
raise ValueError("Entropy length mismatch")
|
|
|
|
return entropy_stripped
|
|
|
|
|
|
def main() -> None:
|
|
print(__doc__)
|
|
|
|
comp = bytes.fromhex(
|
|
input("Please enter computer-generated entropy (in hex): ").strip()
|
|
)
|
|
trzr = bytes.fromhex(
|
|
input("Please enter Trezor-generated entropy (in hex): ").strip()
|
|
)
|
|
word_count = int(input("How many words your mnemonic has? "))
|
|
|
|
strength = word_count * 32 // 3
|
|
|
|
entropy = generate_entropy(strength, trzr, comp)
|
|
|
|
words = mnemonic.Mnemonic("english").to_mnemonic(entropy)
|
|
if not mnemonic.Mnemonic("english").check(words):
|
|
print("Mnemonic is invalid")
|
|
return
|
|
|
|
if len(words.split(" ")) != word_count:
|
|
print("Mnemonic length mismatch!")
|
|
return
|
|
|
|
print("Generated mnemonic is:", words)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|