github.com/minio/minio@v0.0.0-20240328213742-3f72439b8a27/cmd/bucket-encryption.go (about)

     1  // Copyright (c) 2015-2021 MinIO, Inc.
     2  //
     3  // This file is part of MinIO Object Storage stack
     4  //
     5  // This program is free software: you can redistribute it and/or modify
     6  // it under the terms of the GNU Affero General Public License as published by
     7  // the Free Software Foundation, either version 3 of the License, or
     8  // (at your option) any later version.
     9  //
    10  // This program is distributed in the hope that it will be useful
    11  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13  // GNU Affero General Public License for more details.
    14  //
    15  // You should have received a copy of the GNU Affero General Public License
    16  // along with this program.  If not, see <http://www.gnu.org/licenses/>.
    17  
    18  package cmd
    19  
    20  import (
    21  	"errors"
    22  	"io"
    23  
    24  	sse "github.com/minio/minio/internal/bucket/encryption"
    25  )
    26  
    27  // BucketSSEConfigSys - in-memory cache of bucket encryption config
    28  type BucketSSEConfigSys struct{}
    29  
    30  // NewBucketSSEConfigSys - Creates an empty in-memory bucket encryption configuration cache
    31  func NewBucketSSEConfigSys() *BucketSSEConfigSys {
    32  	return &BucketSSEConfigSys{}
    33  }
    34  
    35  // Get - gets bucket encryption config for the given bucket.
    36  func (sys *BucketSSEConfigSys) Get(bucket string) (*sse.BucketSSEConfig, error) {
    37  	sseCfg, _, err := globalBucketMetadataSys.GetSSEConfig(bucket)
    38  	return sseCfg, err
    39  }
    40  
    41  // validateBucketSSEConfig parses bucket encryption configuration and validates if it is supported by MinIO.
    42  func validateBucketSSEConfig(r io.Reader) (*sse.BucketSSEConfig, error) {
    43  	encConfig, err := sse.ParseBucketSSEConfig(r)
    44  	if err != nil {
    45  		return nil, err
    46  	}
    47  
    48  	if len(encConfig.Rules) == 1 {
    49  		return encConfig, nil
    50  	}
    51  
    52  	return nil, errors.New("Unsupported bucket encryption configuration")
    53  }