mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-25 15:50:20 +00:00
58 lines
1.9 KiB
Go
58 lines
1.9 KiB
Go
|
/*
|
||
|
|
* constants.go - Some metadata constants used throughout fscrypt
|
||
|
|
*
|
||
|
|
* Copyright 2017 Google Inc.
|
||
|
|
* Author: Joe Richey (joerichey@google.com)
|
||
|
|
*
|
||
|
|
* 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 metadata
|
||
|
|
|
||
|
|
import (
|
||
|
|
"crypto/sha256"
|
||
|
|
|
||
|
|
"golang.org/x/sys/unix"
|
||
|
|
)
|
||
|
|
|
||
|
|
// Lengths for our keys, buffers, and strings used in fscrypt.
|
||
|
|
const (
|
||
|
|
// Length of policy descriptor (in hex chars) for v1 encryption policies
|
||
|
|
PolicyDescriptorLenV1 = 2 * unix.FSCRYPT_KEY_DESCRIPTOR_SIZE
|
||
|
|
// Length of protector descriptor (in hex chars)
|
||
|
|
ProtectorDescriptorLen = PolicyDescriptorLenV1
|
||
|
|
// Length of policy descriptor (in hex chars) for v2 encryption policies
|
||
|
|
PolicyDescriptorLenV2 = 2 * unix.FSCRYPT_KEY_IDENTIFIER_SIZE
|
||
|
|
// We always use 256-bit keys internally (compared to 512-bit policy keys).
|
||
|
|
InternalKeyLen = 32
|
||
|
|
IVLen = 16
|
||
|
|
SaltLen = 16
|
||
|
|
// We use SHA256 for the HMAC, and len(HMAC) == len(hash size).
|
||
|
|
HMACLen = sha256.Size
|
||
|
|
// PolicyKeyLen is the length of all keys passed directly to the Keyring
|
||
|
|
PolicyKeyLen = unix.FSCRYPT_MAX_KEY_SIZE
|
||
|
|
)
|
||
|
|
|
||
|
|
var (
|
||
|
|
// DefaultOptions use the supported encryption modes, max padding, and
|
||
|
|
// policy version 1.
|
||
|
|
DefaultOptions = &EncryptionOptions{
|
||
|
|
Padding: 32,
|
||
|
|
Contents: EncryptionOptions_AES_256_XTS,
|
||
|
|
Filenames: EncryptionOptions_AES_256_CTS,
|
||
|
|
PolicyVersion: 1,
|
||
|
|
}
|
||
|
|
// DefaultSource is the source we use if none is specified.
|
||
|
|
DefaultSource = SourceType_custom_passphrase
|
||
|
|
)
|