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// MinIO Rust Library for Amazon S3 Compatible Cloud Storage
// Copyright 2025 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.
use crate::impl_has_s3fields;
use crate::s3::error::{Error, S3ServerError, ValidationErr};
use crate::s3::minio_error_response::MinioErrorCode;
use crate::s3::response_traits::{HasBucket, HasRegion};
use crate::s3::types::{FromS3Response, S3Request, SseConfig};
use crate::s3::utils::{get_text_option, get_text_result};
use async_trait::async_trait;
use bytes::{Buf, Bytes};
use http::HeaderMap;
use std::mem;
use xmltree::Element;
/// Response from the [`get_bucket_encryption`](crate::s3::client::MinioClient::get_bucket_encryption) API call,
/// providing the default server-side encryption configuration of an S3 bucket.
///
/// This configuration determines how Amazon S3 encrypts objects stored in the bucket by default.
/// It can specify encryption using Amazon S3 managed keys (SSE-S3), AWS Key Management Service (SSE-KMS),
/// or dual-layer encryption with AWS KMS keys (DSSE-KMS).
///
/// For more information, refer to the [AWS S3 GetBucketEncryption API documentation](https://docs.aws.amazon.com/AmazonS3/latest/API/API_GetBucketEncryption.html).
#[derive(Clone, Debug)]
pub struct GetBucketEncryptionResponse {
request: S3Request,
headers: HeaderMap,
body: Bytes,
}
impl_has_s3fields!(GetBucketEncryptionResponse);
impl HasBucket for GetBucketEncryptionResponse {}
impl HasRegion for GetBucketEncryptionResponse {}
impl GetBucketEncryptionResponse {
/// Returns the default server-side encryption configuration of the bucket.
///
/// This includes the encryption algorithm and, if applicable, the AWS KMS key ID used for encrypting objects.
/// If the bucket has no default encryption configuration, this method returns a default `SseConfig` with empty fields.
pub fn config(&self) -> Result<SseConfig, ValidationErr> {
if self.body.is_empty() {
return Ok(SseConfig::default());
}
let mut root = Element::parse(self.body.clone().reader()).map_err(ValidationErr::from)?; // clone of Bytes is inexpensive
let rule = root
.get_mut_child("Rule")
.ok_or(ValidationErr::xml_error("<Rule> tag not found"))?;
let sse_by_default = rule
.get_mut_child("ApplyServerSideEncryptionByDefault")
.ok_or(ValidationErr::xml_error(
"<ApplyServerSideEncryptionByDefault> tag not found",
))?;
Ok(SseConfig {
sse_algorithm: get_text_result(sse_by_default, "SSEAlgorithm")?,
kms_master_key_id: get_text_option(sse_by_default, "KMSMasterKeyID"),
})
}
}
#[async_trait]
impl FromS3Response for GetBucketEncryptionResponse {
async fn from_s3response(
request: S3Request,
response: Result<reqwest::Response, Error>,
) -> Result<Self, Error> {
match response {
Ok(mut resp) => Ok(Self {
request,
headers: mem::take(resp.headers_mut()),
body: resp.bytes().await.map_err(ValidationErr::HttpError)?,
}),
Err(Error::S3Server(S3ServerError::S3Error(mut e)))
if matches!(
e.code(),
MinioErrorCode::ServerSideEncryptionConfigurationNotFoundError
) =>
{
Ok(Self {
request,
headers: e.take_headers(),
body: Bytes::new(),
})
}
Err(e) => Err(e),
}
}
}