reset_with_entropy.py

#!/usr/bin/env python3
import hashlib
import binascii
import os

from trezorlib import log
from trezorlib.client import TrezorClient
from trezorlib.transport import get_transport
from trezorlib.tools import parse_path

class TrezorEntropySender(TrezorClient):
    def __init__(self, transport):
        super(TrezorClient, self).__init__(transport=transport)

    def _get_local_entropy(self):
        entropy = input("Enter Entropy: ")
        entropy = entropy.encode()
        return entropy


def main():
    passphrase_protection = False
    pin_protection = True
    # 128 = 12 words, 192 = 18 words, 256 = 24 words.
    strength = 256
    label = input("Label: ")

    path = os.environ.get('TREZOR_PATH')
    transport = get_transport(path)
    client = TrezorEntropySender(transport)
    client.reset_device(True, strength, passphrase_protection, pin_protection, label, 'english');
    client.close()


if __name__ == '__main__':
    main()

test_entropy.py

import binascii
import hashlib
from mnemonic import Mnemonic

def main():
    entropy_int = input("Internal Entropy: ")
    entropy_ext = input("External Entropy: ")
    entropy_int = binascii.unhexlify(entropy_int)
    entropy_ext = entropy_ext.encode()
    entropy = hashlib.sha256(entropy_int + entropy_ext).digest()

    print("Raw entropy: ", binascii.hexlify(entropy))
    mnemo = Mnemonic("english")
    print(mnemo.to_mnemonic(entropy))

main()