117 lines
3.2 KiB
Python
Executable File
117 lines
3.2 KiB
Python
Executable File
#!/usr/bin/python
|
|
|
|
'''
|
|
Use Trezor as a hardware key for opening EncFS filesystem!
|
|
|
|
Demo usage:
|
|
|
|
encfs --standard --extpass=./encfs_aes_getpass.py ~/.crypt ~/crypt
|
|
'''
|
|
|
|
import os
|
|
import sys
|
|
import json
|
|
import base64
|
|
import hashlib
|
|
import binascii
|
|
|
|
from trezorlib.client import TrezorClient, TrezorClientDebug
|
|
from trezorlib.transport_hid import HidTransport
|
|
|
|
def wait_for_devices():
|
|
devices = HidTransport.enumerate()
|
|
while not len(devices):
|
|
sys.stderr.write("Please connect Trezor to computer and press Enter...")
|
|
raw_input()
|
|
devices = HidTransport.enumerate()
|
|
|
|
return devices
|
|
|
|
def list_devices(devices):
|
|
i = 0
|
|
sys.stderr.write("----------------------------\n")
|
|
sys.stderr.write("Available devices:\n")
|
|
for d in devices:
|
|
try:
|
|
t = HidTransport(d)
|
|
except IOError:
|
|
sys.stderr.write("[-] <device is currently in use>\n")
|
|
continue
|
|
|
|
client = TrezorClient(t)
|
|
|
|
if client.features.label:
|
|
sys.stderr.write("[%d] %s\n" % (i, client.features.label))
|
|
else:
|
|
sys.stderr.write("[%d] <no label>\n" % i)
|
|
t.close()
|
|
i += 1
|
|
|
|
sys.stderr.write("----------------------------\n")
|
|
sys.stderr.write("Please choose device to use: ")
|
|
|
|
try:
|
|
device_id = int(raw_input())
|
|
t = HidTransport(devices[device_id])
|
|
t.close()
|
|
except:
|
|
raise Exception("Invalid choice, exiting...")
|
|
|
|
return device_id
|
|
|
|
def main():
|
|
|
|
devices = wait_for_devices()
|
|
|
|
if len(devices) > 1:
|
|
device_id = list_devices(devices)
|
|
else:
|
|
device_id = 0
|
|
|
|
transport = HidTransport(devices[device_id])
|
|
client = TrezorClient(transport)
|
|
|
|
rootdir = os.environ['encfs_root'] # Read "man encfs" for more
|
|
passw_file = os.path.join(rootdir, 'password.dat')
|
|
|
|
if os.path.exists(passw_file):
|
|
# Existing encfs drive, let's load password
|
|
|
|
sys.stderr.write('Please confirm action on your device.\n')
|
|
label, passw_encrypted, bip32_path = open(passw_file, 'r').read().split(',')
|
|
passw = client.decrypt_keyvalue(json.loads(binascii.unhexlify(bip32_path)),
|
|
binascii.unhexlify(label),
|
|
binascii.unhexlify(passw_encrypted),
|
|
False, True)
|
|
print passw
|
|
|
|
else:
|
|
# New encfs drive, let's generate password
|
|
|
|
sys.stderr.write('Please provide label for new drive: ')
|
|
label = raw_input()
|
|
|
|
sys.stderr.write('Computer asked Trezor for new strong password.\nPlease confirm action on your device.\n')
|
|
|
|
# 32 bytes, good for AES
|
|
trezor_entropy = client.get_entropy(32)
|
|
urandom_entropy = os.urandom(32)
|
|
passw = hashlib.sha256(trezor_entropy + urandom_entropy).digest()
|
|
|
|
if len(passw) != 32:
|
|
raise Exception("32 bytes password expected")
|
|
|
|
bip32_path = [10, 0]
|
|
passw_encrypted = client.encrypt_keyvalue(bip32_path,
|
|
label, passw, False, True)
|
|
|
|
f = open(passw_file, 'wb')
|
|
f.write(binascii.hexlify(label) + ',' + binascii.hexlify(passw_encrypted) + \
|
|
',' + binascii.hexlify(json.dumps(bip32_path)))
|
|
f.close()
|
|
|
|
print passw
|
|
|
|
if __name__ == '__main__':
|
|
main()
|