class Encoder:
MODES = {'GCM': 8}
def __init__(self,
password,
source_image_folder_path,
destination_image_folder_path,
mode='GCM'):
self.mode = Encoder.MODES[mode]
self.source_image_folder_path = source_image_folder_path
self.destination_image_folder_path = destination_image_folder_path
if os.path.exists(self.destination_image_folder_path):
shutil.rmtree(self.destination_image_folder_path)
os.makedirs(self.destination_image_folder_path)
self.gcm = GCM()
self.gcm.make_key(password)
self.transcriber = Transcriber(self.mode, source_image_folder_path,
destination_image_folder_path)
def encode_file(self, file_path):
with open(file_path, 'rb') as source:
file_bytes = source.read()
encrypted = self.gcm.encrypt(file_bytes)
tag = self.gcm.encrypt_finalize()
header = self.gcm.password_salt + self.gcm.iv
full_length = len(header) + len(encrypted) + len(tag)
# if not self.transcriber.can_fit_bytes(full_length):
# print("Not enough images to store the necessary data")
# exit()
self.transcriber.choose_needed_images(full_length)
print("full length", full_length, full_length * 8)
self.transcriber.set_encoding(header + encrypted + tag)
# with open("encode-test", "wb") as f:
# f.write(header + encrypted + tag)
self.transcriber.finish_encoding()
