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70 lines
2.2 KiB
C
70 lines
2.2 KiB
C
/*
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* des.h
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*
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* header file for DES-150 library
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*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is the DES-150 library.
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*
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* The Initial Developer of the Original Code is Nelson B. Bolyard,
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* nelsonb@iname.com. Portions created by Nelson B. Bolyard are
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* Copyright (C) 1990, 2000 Nelson B. Bolyard, 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
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* terms of the GNU General Public License Version 2 or later (the
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* "GPL"), in which case the provisions of the GPL are applicable
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* instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the GPL and not to
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* allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by
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* the GPL. If you do not delete the provisions above, a recipient
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* may use your version of this file under either the MPL or the GPL.
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*/
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#ifndef _DES_H_
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#define _DES_H_ 1
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#include "blapi.h"
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typedef unsigned char BYTE;
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typedef unsigned int HALF;
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#define HALFPTR(x) ((HALF *)(x))
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#define SHORTPTR(x) ((unsigned short *)(x))
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#define BYTEPTR(x) ((BYTE *)(x))
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typedef enum {
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DES_ENCRYPT = 0x5555,
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DES_DECRYPT = 0xAAAA
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} DESDirection;
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typedef void DESFunc(struct DESContextStr *cx, BYTE *out, const BYTE *in,
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unsigned int len);
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struct DESContextStr {
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/* key schedule, 16 internal keys, each with 8 6-bit parts */
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HALF ks0 [32];
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HALF ks1 [32];
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HALF ks2 [32];
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HALF iv [2];
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DESDirection direction;
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DESFunc *worker;
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};
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void DES_MakeSchedule( HALF * ks, const BYTE * key, DESDirection direction);
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void DES_Do1Block( HALF * ks, const BYTE * inbuf, BYTE * outbuf);
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#endif
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