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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
+