102 lines
3.2 KiB
Python
102 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
|
|
# MinIO Python Library for Amazon S3 Compatible Cloud Storage, (C)
|
|
# 2020 MinIO, Inc.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License");
|
|
# you may not use this file except in compliance with the License.
|
|
# You may obtain a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS,
|
|
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
# See the License for the specific language governing permissions and
|
|
# limitations under the License.
|
|
|
|
"""Request/response of PutBucketEncryption and GetBucketEncryption APIs."""
|
|
|
|
from __future__ import absolute_import, annotations
|
|
|
|
from abc import ABC
|
|
from dataclasses import dataclass
|
|
from typing import Optional, Type, TypeVar, cast
|
|
from xml.etree import ElementTree as ET
|
|
|
|
from .xml import Element, SubElement, find, findtext
|
|
|
|
AES256 = "AES256"
|
|
AWS_KMS = "aws:kms"
|
|
|
|
A = TypeVar("A", bound="Rule")
|
|
|
|
|
|
@dataclass(frozen=True)
|
|
class Rule(ABC):
|
|
"""Server-side encryption rule. """
|
|
|
|
sse_algorithm: str
|
|
kms_master_key_id: Optional[str] = None
|
|
|
|
@classmethod
|
|
def new_sse_s3_rule(cls: Type[A]) -> A:
|
|
"""Create SSE-S3 rule."""
|
|
return cls(sse_algorithm=AES256)
|
|
|
|
@classmethod
|
|
def new_sse_kms_rule(
|
|
cls: Type[A],
|
|
kms_master_key_id: Optional[str] = None,
|
|
) -> A:
|
|
"""Create new SSE-KMS rule."""
|
|
return cls(sse_algorithm=AWS_KMS, kms_master_key_id=kms_master_key_id)
|
|
|
|
@classmethod
|
|
def fromxml(cls: Type[A], element: ET.Element) -> A:
|
|
"""Create new object with values from XML element."""
|
|
element = cast(
|
|
ET.Element,
|
|
find(element, "ApplyServerSideEncryptionByDefault", True),
|
|
)
|
|
return cls(
|
|
sse_algorithm=cast(str, findtext(element, "SSEAlgorithm", True)),
|
|
kms_master_key_id=findtext(element, "KMSMasterKeyID"),
|
|
)
|
|
|
|
def toxml(self, element: Optional[ET.Element]) -> ET.Element:
|
|
"""Convert to XML."""
|
|
if element is None:
|
|
raise ValueError("element must be provided")
|
|
element = SubElement(element, "Rule")
|
|
tag = SubElement(element, "ApplyServerSideEncryptionByDefault")
|
|
SubElement(tag, "SSEAlgorithm", self.sse_algorithm)
|
|
if self.kms_master_key_id is not None:
|
|
SubElement(tag, "KMSMasterKeyID", self.kms_master_key_id)
|
|
return element
|
|
|
|
|
|
B = TypeVar("B", bound="SSEConfig")
|
|
|
|
|
|
@dataclass(frozen=True)
|
|
class SSEConfig:
|
|
"""server-side encryption configuration."""
|
|
|
|
rule: Rule
|
|
|
|
def __post_init__(self):
|
|
if not self.rule:
|
|
raise ValueError("rule must be provided")
|
|
|
|
@classmethod
|
|
def fromxml(cls: Type[B], element: ET.Element) -> B:
|
|
"""Create new object with values from XML element."""
|
|
element = cast(ET.Element, find(element, "Rule", True))
|
|
return cls(Rule.fromxml(element))
|
|
|
|
def toxml(self, element: Optional[ET.Element]) -> ET.Element:
|
|
"""Convert to XML."""
|
|
element = Element("ServerSideEncryptionConfiguration")
|
|
self.rule.toxml(element)
|
|
return element
|