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// distribution boxbackup-0.10 (svn version: 494)
//
// Copyright (c) 2003 - 2006
// Ben Summers and contributors. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. All use of this software and associated advertising materials must
// display the following acknowledgment:
// This product includes software developed by Ben Summers.
// 4. The names of the Authors may not be used to endorse or promote
// products derived from this software without specific prior written
// permission.
//
// [Where legally impermissible the Authors do not disclaim liability for
// direct physical injury or death caused solely by defects in the software
// unless it is modified by a third party.]
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
//
//
// --------------------------------------------------------------------------
//
// 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
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