#!/usr/bin/env python3

# Copyright 2016 Netfishers

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

#TODO: replace getpass with this Python3 compliant way of doing the same thing:

#https://cryptography.io/en/latest/fernet/#using-passwords-with-fernet

import hashlib

import os.path

import re

from libs import constants

from libs.getpass import getpass

from libs.cryptolib import encrypt_file

from libs.cryptolib import decrypt_file

askedaction = input('What do you wanna do ? decrypt/encrypt - [D/e]: ')

if (re.match('(?i)d(ecrypt|)$',askedaction) or not askedaction): action = 'decrypt'

elif (re.match('(?i)e(ncrypt|)$',askedaction)): action = 'encrypt'

else: exit('Invalid value: "'+askedaction+'"')

askedfile = input('What is the filename you want to '+action+' ? ')

if os.path.isfile(askedfile):file = askedfile

else: exit('Invalid filename: "'+askedfile+'"')

password = getpass('Please enter your password: ')

password_encoded = password.encode('utf-8')

key = hashlib.sha256(password_encoded).digest()

if action == 'encrypt':

encrypt_file(key,file)

print('Encrypt "'+file+'" and save it in "'+file+'.enc"')

elif action == 'decrypt':

outfile = input('Name of clear file to be created ? ')

decrypt_file(key,file,outfile)

print('Decrypt "'+file+'" and save it to "'+outfile+'"')