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Copy pathsseconfig.py
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101 lines (80 loc) · 3.17 KB
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# -*- 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
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