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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.
- """Credential definitions to access S3 service."""
- from __future__ import annotations
- from dataclasses import dataclass
- from datetime import datetime, timedelta, timezone
- from typing import Optional
- @dataclass(frozen=True)
- class Credentials:
- """
- Represents credentials access key, secret key and session token.
- """
- access_key: str
- secret_key: str
- session_token: Optional[str] = None
- expiration: Optional[datetime] = None
- def __post_init__(self):
- if not self.access_key:
- raise ValueError("Access key must not be empty")
- if not self.secret_key:
- raise ValueError("Secret key must not be empty")
- if self.expiration and self.expiration.tzinfo:
- object.__setattr__(
- self, "expiration",
- self.expiration.astimezone(timezone.utc).replace(tzinfo=None),
- )
- def is_expired(self) -> bool:
- """Check whether this credentials expired or not."""
- return (
- self.expiration < (datetime.utcnow() + timedelta(seconds=10))
- if self.expiration else False
- )
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