mirror of
https://github.com/minio/minio.git
synced 2024-12-25 22:55:54 -05:00
758a80e39b
This commit adds basic support for SSE-C / SSE-C copy. This includes functions for determining whether SSE-C is requested by the S3 client and functions for parsing such HTTP headers. All S3 SSE-C parsing errors are exported such that callers can pattern-match to forward the correct error to S3 clients. Further the SSE-C related internal metadata entry-keys are added by this commit.
94 lines
3.6 KiB
Go
94 lines
3.6 KiB
Go
// Minio Cloud Storage, (C) 2015, 2016, 2017, 2018 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.
|
|
|
|
package crypto
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"io"
|
|
|
|
"github.com/minio/minio/cmd/logger"
|
|
"github.com/minio/minio/pkg/ioutil"
|
|
"github.com/minio/sio"
|
|
)
|
|
|
|
const (
|
|
// SSEIV is the metadata key referencing the random initialization
|
|
// vector (IV) used for SSE-S3 and SSE-C key derivation.
|
|
SSEIV = "X-Minio-Internal-Server-Side-Encryption-Iv"
|
|
|
|
// SSESealAlgorithm is the metadata key referencing the algorithm
|
|
// used by SSE-C and SSE-S3 to encrypt the object.
|
|
SSESealAlgorithm = "X-Minio-Internal-Server-Side-Encryption-Seal-Algorithm"
|
|
|
|
// SSECSealKey is the metadata key referencing the sealed object-key for SSE-C.
|
|
SSECSealKey = "X-Minio-Internal-Server-Side-Encryption-Sealed-Key"
|
|
|
|
// S3SealedKey is the metadata key referencing the sealed object-key for SSE-S3.
|
|
S3SealedKey = "X-Minio-Internal-Server-Side-Encryption-S3-Sealed-Key"
|
|
|
|
// S3KMSKeyID is the metadata key referencing the KMS key-id used to
|
|
// generate/decrypt the S3-KMS-Sealed-Key. It is only used for SSE-S3 + KMS.
|
|
S3KMSKeyID = "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Key-Id"
|
|
|
|
// S3KMSSealedKey is the metadata key referencing the encrypted key generated
|
|
// by KMS. It is only used for SSE-S3 + KMS.
|
|
S3KMSSealedKey = "X-Minio-Internal-Server-Side-Encryption-S3-Kms-Sealed-Key"
|
|
)
|
|
|
|
const (
|
|
// SealAlgorithm is the encryption/sealing algorithm used to derive & seal
|
|
// the key-encryption-key and to en/decrypt the object data.
|
|
SealAlgorithm = "DAREv2-HMAC-SHA256"
|
|
|
|
// InsecureSealAlgorithm is the legacy encryption/sealing algorithm used
|
|
// to derive & seal the key-encryption-key and to en/decrypt the object data.
|
|
// This algorithm should not be used for new objects because its key derivation
|
|
// is not optimal. See: https://github.com/minio/minio/pull/6121
|
|
InsecureSealAlgorithm = "DARE-SHA256"
|
|
)
|
|
|
|
// EncryptSinglePart encrypts an io.Reader which must be the
|
|
// the body of a single-part PUT request.
|
|
func EncryptSinglePart(r io.Reader, key ObjectKey) io.Reader {
|
|
r, err := sio.EncryptReader(r, sio.Config{MinVersion: sio.Version20, Key: key[:]})
|
|
if err != nil {
|
|
logger.CriticalIf(context.Background(), errors.New("Unable to encrypt io.Reader using object key"))
|
|
}
|
|
return r
|
|
}
|
|
|
|
// EncryptMultiPart encrypts an io.Reader which must be the body of
|
|
// multi-part PUT request. It derives an unique encryption key from
|
|
// the partID and the object key.
|
|
func EncryptMultiPart(r io.Reader, partID int, key ObjectKey) io.Reader {
|
|
partKey := key.DerivePartKey(uint32(partID))
|
|
return EncryptSinglePart(r, ObjectKey(partKey))
|
|
}
|
|
|
|
// DecryptSinglePart decrypts an io.Writer which must an object
|
|
// uploaded with the single-part PUT API. The offset and length
|
|
// specify the requested range.
|
|
func DecryptSinglePart(w io.Writer, offset, length int64, key ObjectKey) io.WriteCloser {
|
|
const PayloadSize = 1 << 16 // DARE 2.0
|
|
w = ioutil.LimitedWriter(w, offset%PayloadSize, length)
|
|
|
|
decWriter, err := sio.DecryptWriter(w, sio.Config{Key: key[:]})
|
|
if err != nil {
|
|
logger.CriticalIf(context.Background(), errors.New("Unable to decrypt io.Writer using object key"))
|
|
}
|
|
return decWriter
|
|
}
|