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# Copyright (C) 2014 Combox author(s). See AUTHORS.
#
# This file is part of Combox.
#
# Combox is free software: you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Combox 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
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Combox (see COPYING). If not, see
# <http://www.gnu.org/licenses/>.
from glob import glob
from nose.tools import *
from os import path, remove
from combox.file import (split_data, glue_data, write_file,
read_file, write_shards, read_shards)
from combox.crypto import encrypt, decrypt, encrypt_shards, decrypt_shards
FILES_DIR = path.join('tests','files')
TEST_FILE = path.join(FILES_DIR,'the-red-star.jpg')
PASS = 'topsecret'
def test_encryption():
""" Read file, encrypt it to a cipher, write cipher to file, read
encrypted file, decrypt it, write decrypted data to file.
"""
f = path.abspath(TEST_FILE)
f_content = read_file(f)
# encrypt
f_cipher = encrypt(f_content, PASS)
# decrypt
f_content_decrypted = decrypt(f_cipher, PASS)
assert f_content == f_content_decrypted
def test_split_encryption():
"""Read file, split it, encrypt shards, write encrypted shards to
file, read encrypted shards from file, decrypt the encrypted shards,
glue the shards together, write glued data to file.
"""
f = path.abspath(TEST_FILE)
f_content = read_file(f)
f_shards = split_data(f_content, 5)
# encrypt shards
ciphered_shards = encrypt_shards(f_shards, PASS)
# write ciphered shards to disk
f_path = FILES_DIR
f_basename = "%s.ciphered" % path.basename(f)
write_shards(ciphered_shards, f_path, f_basename)
# read ciphered shards from disk
ciphered_shards = read_shards(f_path, f_basename)
# decrypt shards
f_parts = decrypt_shards(ciphered_shards, PASS)
# glue them shards together
f_content_glued = glue_data(f_parts)
assert f_content == f_content_glued
# remove ciphered shards from disk
c_shards = glob("%s.ciphered*" % TEST_FILE)
for shard in c_shards:
remove(shard)
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