gecko-dev/security/nss/lib/freebl/rijndael.h
2008-06-06 08:40:11 -04:00

96 lines
3.5 KiB
C

/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Netscape security libraries.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1994-2000
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/* $Id: rijndael.h,v 1.11 2005/08/06 07:24:21 nelsonb%netscape.com Exp $ */
#ifndef _RIJNDAEL_H_
#define _RIJNDAEL_H_ 1
#define RIJNDAEL_MIN_BLOCKSIZE 16 /* bytes */
#define RIJNDAEL_MAX_BLOCKSIZE 32 /* bytes */
typedef SECStatus AESFunc(AESContext *cx, unsigned char *output,
unsigned int *outputLen, unsigned int maxOutputLen,
const unsigned char *input, unsigned int inputLen,
unsigned int blocksize);
typedef SECStatus AESBlockFunc(AESContext *cx,
unsigned char *output,
const unsigned char *input);
/* RIJNDAEL_NUM_ROUNDS
*
* Number of rounds per execution
* Nk - number of key bytes
* Nb - blocksize (in bytes)
*/
#define RIJNDAEL_NUM_ROUNDS(Nk, Nb) \
(PR_MAX(Nk, Nb) + 6)
/* RIJNDAEL_MAX_STATE_SIZE
*
* Maximum number of bytes in the state (spec includes up to 256-bit block
* size)
*/
#define RIJNDAEL_MAX_STATE_SIZE 32
/*
* This magic number is (Nb_max * (Nr_max + 1))
* where Nb_max is the maximum block size in 32-bit words,
* Nr_max is the maximum number of rounds, which is Nb_max + 6
*/
#define RIJNDAEL_MAX_EXP_KEY_SIZE (8 * 15)
/* AESContextStr
*
* Values which maintain the state for Rijndael encryption/decryption.
*
* iv - initialization vector for CBC mode
* Nb - the number of bytes in a block, specified by user
* Nr - the number of rounds, specified by a table
* expandedKey - the round keys in 4-byte words, the length is Nr * Nb
* worker - the encryption/decryption function to use with this context
*/
struct AESContextStr
{
unsigned int Nb;
unsigned int Nr;
AESFunc *worker;
unsigned char iv[RIJNDAEL_MAX_BLOCKSIZE];
PRUint32 expandedKey[RIJNDAEL_MAX_EXP_KEY_SIZE];
};
#endif /* _RIJNDAEL_H_ */