1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
######################################################################
#
# File: b2sdk/_internal/encryption/types.py
#
# Copyright 2021 Backblaze Inc. All Rights Reserved.
#
# License https://www.backblaze.com/using_b2_code.html
#
######################################################################
from __future__ import annotations
from enum import Enum, unique
@unique
class EncryptionAlgorithm(Enum):
"""Encryption algorithm."""
AES256 = 'AES256'
def get_length(self) -> int:
if self is EncryptionAlgorithm.AES256:
return int(256 / 8)
raise NotImplementedError()
@unique
class EncryptionMode(Enum):
"""Encryption mode."""
UNKNOWN = None #: unknown encryption mode (sdk doesn't know or used key has no rights to know)
NONE = 'none' #: no encryption (plaintext)
SSE_B2 = 'SSE-B2' #: server-side encryption with key maintained by B2
SSE_C = 'SSE-C' #: server-side encryption with key provided by the client
# CLIENT = 'CLIENT' #: client-side encryption
def can_be_set_as_bucket_default(self):
return self in BUCKET_DEFAULT_ENCRYPTION_MODES
ENCRYPTION_MODES_WITH_MANDATORY_ALGORITHM = frozenset((EncryptionMode.SSE_B2, EncryptionMode.SSE_C))
ENCRYPTION_MODES_WITH_MANDATORY_KEY = frozenset((EncryptionMode.SSE_C,))
BUCKET_DEFAULT_ENCRYPTION_MODES = frozenset((EncryptionMode.NONE, EncryptionMode.SSE_B2))
|
