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