1 files changed, 0 insertions, 95 deletions
diff --git a/omemo/backend/aes.py b/omemo/backend/aes.py
deleted file mode 100644
index 49d288a..0000000
--- a/omemo/backend/aes.py
+++ /dev/null
@@ -1,95 +0,0 @@
-# Copyright (C) 2019 Philipp Hörist <philipp AT hoerist.com>
-#
-# This file is part of OMEMO Gajim Plugin.
-#
-# OMEMO Gajim Plugin 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; version 3 only.
-#
-# OMEMO Gajim Plugin 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 OMEMO Gajim Plugin. If not, see <http://www.gnu.org/licenses/>.
-
-
-import os
-import logging
-from collections import namedtuple
-
-from cryptography.hazmat.primitives.ciphers import Cipher
-from cryptography.hazmat.primitives.ciphers import algorithms
-from cryptography.hazmat.primitives.ciphers.modes import GCM
-from cryptography.hazmat.backends import default_backend
-
-log = logging.getLogger('gajim.p.omemo')
-
-EncryptionResult = namedtuple('EncryptionResult', 'payload key iv')
-
-IV_SIZE = 12
-
-def _decrypt(key, iv, tag, data):
-    decryptor = Cipher(
-        algorithms.AES(key),
-        GCM(iv, tag=tag),
-        backend=default_backend()).decryptor()
-    return decryptor.update(data) + decryptor.finalize()
-
-
-def aes_decrypt(_key, iv, payload):
-    if len(_key) >= 32:
-        # XEP-0384
-        log.debug('XEP Compliant Key/Tag')
-        data = payload
-        key = _key[:16]
-        tag = _key[16:]
-    else:
-        # Legacy
-        log.debug('Legacy Key/Tag')
-        data = payload[:-16]
-        key = _key
-        tag = payload[-16:]
-
-    return _decrypt(key, iv, tag, data).decode()
-
-
-def aes_decrypt_file(key, iv, payload):
-    data = payload[:-16]
-    tag = payload[-16:]
-    return _decrypt(key, iv, tag, data)
-
-
-def _encrypt(data, key_size, iv_size=IV_SIZE):
-    if isinstance(data, str):
-        data = data.encode()
-    key = os.urandom(key_size)
-    iv = os.urandom(iv_size)
-    encryptor = Cipher(
-        algorithms.AES(key),
-        GCM(iv),
-        backend=default_backend()).encryptor()
-
-    payload = encryptor.update(data) + encryptor.finalize()
-    return key, iv, encryptor.tag, payload
-
-
-def aes_encrypt(plaintext):
-    key, iv, tag, payload = _encrypt(plaintext, 16)
-    key += tag
-    return EncryptionResult(payload=payload, key=key, iv=iv)
-
-
-def aes_encrypt_file(data):
-    key, iv, tag, payload, = _encrypt(data, 32)
-    payload += tag
-    return EncryptionResult(payload=payload, key=key, iv=iv)
-
-
-def get_new_key():
-    return os.urandom(16)
-
-
-def get_new_iv():
-    return os.urandom(IV_SIZE)