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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/>.
import yaml
from filecmp import cmp
from glob import glob
from nose.tools import *
from os import path, remove
from shutil import copyfile
from combox.config import get_nodedirs
from combox.crypto import *
from combox.file import *
CONFIG_DIR = path.join('tests', 'test-config')
config_file = path.join(CONFIG_DIR, 'config.yaml')
try:
config = yaml.load(file(config_file, 'r'))
except yaml.YAMLError, exc:
raise AssertionError("Error in configuration file:", exc)
FILES_DIR = config['combox_dir']
TEST_FILE = path.join(FILES_DIR,'thgttg-21st.png')
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, config['topsecret'])
# decrypt
f_content_decrypted = decrypt(f_cipher, config['topsecret'])
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.
"""
# no. of shards = no. of nodes
SHARDS = len(config['nodes_info'].keys())
f = path.abspath(TEST_FILE)
f_content = read_file(f)
f_shards = split_data(f_content, SHARDS)
# encrypt shards
ciphered_shards = encrypt_shards(f_shards, config['topsecret'])
# write ciphered shards to disk
f_basename = path.basename(f)
nodes = get_nodedirs(config)
write_shards(ciphered_shards, nodes, f_basename)
# read ciphered shards from disk
ciphered_shards = read_shards(nodes, f_basename)
# decrypt shards
f_parts = decrypt_shards(ciphered_shards, config['topsecret'])
# glue them shards together
f_content_glued = glue_data(f_parts)
assert f_content == f_content_glued
def test_convenience_crypto():
"""
Tests convenience crypto function(s) - split_and_encrypt, decrypt and glue.
"""
# splits file into shards, writes encrypted shards to respective
# node directories.
split_and_encrypt(TEST_FILE, config)
# create a copy of TEST_FILE (for later comparision)
TEST_FILE_COPY = "%s.copy" % TEST_FILE
copyfile(TEST_FILE, TEST_FILE_COPY)
# reads encrypted shards from node directories, glues them and
# writes decrypted back to combox directory.
decrypt_and_glue(TEST_FILE, config)
assert cmp(TEST_FILE, TEST_FILE_COPY, False)
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