#!/usr/bin/env python3 ## Permission is hereby granted, free of charge, to any person obtaining a ## copy of this software and associated documentation files (the "Software"), ## to deal in the Software without restriction, including without limitation ## the rights to use, copy, modify, merge, publish, distribute, sublicense, ## and/or sell copies of the Software, and to permit persons to whom the ## Software is furnished to do so, subject to the following conditions: ## ## The above copyright notice and this permission notice shall be included in ## all copies or substantial portions of the Software. ## ## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS ## OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, ## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE ## AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER ## LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING ## FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER ## DEALINGS IN THE SOFTWARE. import os import sys, getopt import io import json import zipfile import base64 import hashlib import pyAesCrypt from collections import OrderedDict from tempfile import mkstemp, mkdtemp, TemporaryFile, TemporaryDirectory, NamedTemporaryFile import gnupg import shutil from joblib import Parallel, delayed import multiprocessing def mainReEncrypt(options): # locate dlist dlists = [name for name in os.listdir(options['orig']['path']) if name.endswith(".dlist.%s" %(options['orig']['extension']))] # loop over all dlists; they only need to be enencrypted, and encrypted. They have no relation to the dindex and dblock files. with NamedTemporaryFile() as temp_file: for dlist_enc in dlists: dlist_enc_fullpath = os.path.join(options['orig']['path'],dlist_enc) dlist_reenc_fullpath = os.path.join(options['new']['path'],change_ext(dlist_enc,options['orig']['extension'],options['new']['extension'])) decrypt(options['orig'],dlist_enc_fullpath,options['orig']['passwd'],temp_file.name) encrypt(options['new'],temp_file.name,options['new']['passwd'], dlist_reenc_fullpath) # locate dlist dindex = [name for name in os.listdir(options['orig']['path']) if name.endswith(".dindex.%s" %(options['orig']['extension']))] num_cores = multiprocessing.cpu_count() Parallel(n_jobs=num_cores*2)(delayed(handleIndex)(options, dindex_enc) for dindex_enc in dindex) def handleIndex(options, dindex_enc): with NamedTemporaryFile() as temp_dindex, NamedTemporaryFile() as temp_dindex_reenc, TemporaryDirectory() as temp_path_zip: dindex_enc_fullpath = os.path.join(options['orig']['path'],dindex_enc) dindex_reenc_fullpath = os.path.join(options['new']['path'],change_ext(dindex_enc,options['orig']['extension'],options['new']['extension'])) decrypt(options['orig'],dindex_enc_fullpath,options['orig']['passwd'],temp_dindex.name) unzip(temp_dindex,temp_path_zip) vol_path = os.path.join(temp_path_zip,'vol') if os.path.exists(vol_path): for dblock in os.listdir(vol_path): data = [] with open(os.path.join(vol_path, dblock)) as data_file: data = json.load(data_file, object_pairs_hook=OrderedDict) expected_hash = data['volumehash'].encode('utf8') expected_volumesize = data['volumesize'] if (options['verify_hash']): actual_hash = computeHash(os.path.join(options['orig']['path'],dblock)) actual_volumesize=os.stat(os.path.join(options['orig']['path'],dblock)).st_size print('dblock: %s expected_hash: %s calc_hash: %s exact: %s' % (dblock,expected_hash.decode('utf8'),actual_hash.decode('utf8'),expected_hash==actual_hash)) with NamedTemporaryFile() as temp_dblock: dblock_enc_fullpath = os.path.join(options['orig']['path'],dblock) dblock_reenc_fullpath = os.path.join(options['new']['path'],change_ext(dblock,options['orig']['extension'],options['new']['extension'])) decrypt(options['orig'],dblock_enc_fullpath,options['orig']['passwd'],temp_dblock.name) encrypt(options['new'],temp_dblock.name,options['new']['passwd'], dblock_reenc_fullpath) new_hash = computeHash(dblock_reenc_fullpath) data['volumehash'] = new_hash.decode('utf8') data['volumesize'] = os.stat(os.path.join(options['new']['path'],change_ext(dblock,options['orig']['extension'],options['new']['extension']))).st_size print('dblock: %s old_hash: %s new_hash: %s' % (dblock,expected_hash.decode('utf8'),data['volumehash'])) with open(os.path.join(vol_path,dblock),'w') as data_file: json.dump(data, data_file) os.rename(os.path.join(vol_path, dblock), os.path.join(vol_path, change_ext(dblock,options['orig']['extension'],options['new']['extension']))) make_zipfile(temp_dindex_reenc.name,temp_path_zip) encrypt(options['new'],temp_dindex_reenc.name, options['new']['passwd'],dindex_reenc_fullpath) def change_ext(filename, ext_old, ext_new): return filename.replace(ext_old, ext_new) def decrypt(options, encrypted, passw, decrypted): print('decrypting: %s to %s' % (encrypted, decrypted)) if options['encryption']=='aes': bufferSize = 64 * 1024 pyAesCrypt.decryptFile(encrypted, decrypted, passw, bufferSize) if options['encryption']=='gpg': gpg = gnupg.GPG() with open(encrypted, 'rb') as f: status = gpg.decrypt_file(f, output=decrypted,passphrase=passw) if options['encryption']=='none': shutil.copy(encrypted,decrypted) def encrypt(options,decrypted, passw, encrypted): print('encrypting: %s %s' % (decrypted, encrypted)) if options['encryption']=='aes': bufferSize = 64 * 1024 pyAesCrypt.encryptFile(decrypted, encrypted, passw, bufferSize) if options['encryption']=='gpg': gpg = gnupg.GPG() with open(decrypted, 'rb') as f: status = gpg.encrypt_file(f, recipients=options['recipients'], output=encrypted, armor=False) if options['encryption']=='none': shutil.copy(decrypted,encrypted) def emptydir(top): if(top == '/' or top == "\\"): return else: for root, dirs, files in os.walk(top, topdown=False): for name in files: os.remove(os.path.join(root, name)) for name in dirs: os.rmdir(os.path.join(root, name)) def unzip(archive, path): emptydir(path) with zipfile.ZipFile(archive.name) as zf: zf.extractall(path) def make_zipfile(output_filename, source_dir): print('zipping: %s to %s' % (source_dir, output_filename)) emptydir(output_filename) relroot=source_dir with zipfile.ZipFile(output_filename, "w", zipfile.ZIP_DEFLATED) as zip: for root, dirs, files in os.walk(source_dir): # add directory (needed for empty dirs) zip.write(root, os.path.relpath(root, relroot)) for file in files: filename = os.path.join(root, file) if os.path.isfile(filename): # regular files only arcname = os.path.join(os.path.relpath(root, relroot), file) zip.write(filename, arcname) def rezip(temp_path_z, path): zf = zipfile.ZipFile(path, "w") for dirname, subdirs, files in os.walk(temp_path_z): zf.write(dirname) for filename in files: zf.write(os.path.join(dirname, filename)) zf.close() def zipdir(path,ziph): for root, dirs, files in os.walk(path): for file in files: ziph.write(os.path.join(root, file)) def computeHash(path): print('hashing: %s ' % (path)) buffersize=64 * 1024 hasher = hashlib.sha256() with open(path, 'rb') as f: while True: buffer = f.read(buffersize) if not buffer: break hasher.update(buffer) return base64.b64encode(hasher.digest()) def main(argv): configfile = '' try: opts, args = getopt.getopt(argv,"hc:") except getopt.GetoptError: print('ReEncrypt.py -c ') sys.exit(2) for opt, arg in opts: if opt == '-h': print('ReEncrypt.py -c ') sys.exit(2) elif opt == '-c': configfile = arg else: print( "unhandled option") if (configfile == ''): print('ReEncrypt.py -c ') sys.exit(2) with open(configfile) as infile: options = json.load(infile) mainReEncrypt(options) print('Complete.') if __name__ == "__main__": main(sys.argv[1:])