blob: 5e3a7df25f6343e0d11ab247a12d7cd86fbeb9ec (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
|
// --------------------------------------------------------------------------
//
// File
// Name: BackupClientCryptoKeys.h
// Purpose: Format of crypto keys file, and function for setting everything up
// Created: 1/12/03
//
// --------------------------------------------------------------------------
#ifndef BACKUPCLIENTCRYTOKEYS__H
#define BACKUPCLIENTCRYTOKEYS__H
// All keys are the maximum size that Blowfish supports. Since only the
// setup time is affected by key length (encryption same speed whatever)
// there is no disadvantage to using long keys as they are never
// transmitted and are static over long periods of time.
// All sizes in bytes. Some gaps deliberately left in the used material.
// How long the key material file is expected to be
#define BACKUPCRYPTOKEYS_FILE_SIZE 1024
// key for encrypting filenames (448 bits)
#define BACKUPCRYPTOKEYS_FILENAME_KEY_START 0
#define BACKUPCRYPTOKEYS_FILENAME_KEY_LENGTH 56
#define BACKUPCRYPTOKEYS_FILENAME_IV_START (0 + BACKUPCRYPTOKEYS_FILENAME_KEY_LENGTH)
#define BACKUPCRYPTOKEYS_FILENAME_IV_LENGTH 8
// key for encrypting attributes (448 bits)
#define BACKUPCRYPTOKEYS_ATTRIBUTES_KEY_START (BACKUPCRYPTOKEYS_FILENAME_KEY_START+64)
#define BACKUPCRYPTOKEYS_ATTRIBUTES_KEY_LENGTH 56
// Blowfish key for encrypting file data (448 bits (max blowfish key length))
#define BACKUPCRYPTOKEYS_FILE_KEY_START (BACKUPCRYPTOKEYS_ATTRIBUTES_KEY_START+64)
#define BACKUPCRYPTOKEYS_FILE_KEY_LENGTH 56
// key for encrypting file block index entries
#define BACKUPCRYPTOKEYS_FILE_BLOCK_ENTRY_KEY_START (BACKUPCRYPTOKEYS_FILE_KEY_START+64)
#define BACKUPCRYPTOKEYS_FILE_BLOCK_ENTRY_KEY_LENGTH 56
// Secret for hashing attributes
#define BACKUPCRYPTOKEYS_ATTRIBUTE_HASH_SECRET_START (BACKUPCRYPTOKEYS_FILE_BLOCK_ENTRY_KEY_START+64)
#define BACKUPCRYPTOKEYS_ATTRIBUTE_HASH_SECRET_LENGTH 128
// AES key for encrypting file data (256 bits (max AES key length))
#define BACKUPCRYPTOKEYS_FILE_AES_KEY_START (BACKUPCRYPTOKEYS_ATTRIBUTE_HASH_SECRET_START+128)
#define BACKUPCRYPTOKEYS_FILE_AES_KEY_LENGTH 32
void BackupClientCryptoKeys_Setup(const char *KeyMaterialFilename);
#endif // BACKUPCLIENTCRYTOKEYS__H
|
