swap.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
* Copyright 1999-2002 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Cylink Corporation � 1998
*
* This software is licensed by Cylink to the Internet Software Consortium to
* promote implementation of royalty free public key cryptography within IETF
* standards. Cylink wishes to expressly thank the contributions of Dr.
* Martin Hellman, Whitfield Diffie, Ralph Merkle and Stanford University for
* their contributions to Internet Security. In accordance with the terms of
* this license, ISC is authorized to distribute and sublicense this software
* for the practice of IETF standards.
*
* The software includes BigNum, written by Colin Plumb and licensed by Philip
* R. Zimmermann for royalty free use and distribution with Cylink's
* software. Use of BigNum as a stand alone product or component is
* specifically prohibited.
*
* Disclaimer of All Warranties. THIS SOFTWARE IS BEING PROVIDED "AS IS",
* WITHOUT ANY EXPRESSED OR IMPLIED WARRANTY OF ANY KIND WHATSOEVER. IN
* PARTICULAR, WITHOUT LIMITATION ON THE GENERALITY OF THE FOREGOING, CYLINK
* MAKES NO REPRESENTATION OF THIS SOFTWARE OR ITS FITNESS FOR ANY PARTICULAR
* PURPOSE.
*
* Cylink or its representatives shall not be liable for tort, indirect,
* special or consequential damages such as loss of profits or loss of
* goodwill from the use or inability to use the software for any purpose or
* for any reason whatsoever.
*
* EXPORT LAW: Export of the Foundations Suite may be subject to compliance
* with the rules and regulations promulgated from time to time by the Bureau
* of Export Administration, United States Department of Commerce, which
* restrict the export and re-export of certain products and technical data.
* If the export of the Foundations Suite is controlled under such rules and
* regulations, then the Foundations Suite shall not be exported or
* re-exported, directly or indirectly, (a) without all export or re-export
* licenses and governmental approvals required by any applicable laws, or (b)
* in violation of any applicable prohibition against the export or re-export
* of any part of the Foundations Suite. All export licenses for software
* containing the Foundations Suite are the sole responsibility of the licensee.
*/
/****************************************************************************
* FILENAME: swap.c PRODUCT NAME: CRYPTOGRAPHIC TOOLKIT
*
* FILE STATUS:
*
* DESCRIPTION: Byte and Word Swap functions
*
* PUBLIC FUNCTIONS:
*
*
* PRIVATE FUNCTIONS:
*
* REVISION HISTORY:
*
* 14 Oct 94 GKL Initial release
* 26 Oct 94 GKL (alignment for big endian support )
*
****************************************************************************/
#pragma ident "%Z%%M% %I% %E% SMI"
/****************************************************************************
* INCLUDE FILES
****************************************************************************/
/* system files */
#include "port_before.h"
#ifdef VXD
#include <vtoolsc.h>
#else
#include <stdlib.h>
#include <string.h>
#endif
/* program files */
#include "cylink.h"
#include "ctk_endian.h"
#include "toolkit.h"
#include "port_after.h"
/*Reset bytes in long*/
/*extern void ByteSwap32_asm( uchar *X, u_int16_t X_len );*/ /*kz*/
/****************************************************************************
* NAME: void ByteSwap32 (uchar *array,
* u_int16_t X_len )
*
* DESCRIPTION: Perform byte reversal on an array of longword.
*
* INPUTS:
* PARAMETERS:
* uchar *X Pointer to array
* u_int16_t X_len Number of bytes
* OUTPUT:
* uchar *X Pointer to array
*
* REVISION HISTORY:
*
* 24 Sep 94 KPZ Initial release
* 14 Oct 94 GKL Second version (big endian support)
*
****************************************************************************/
{
u_int16_t i; /*counter*/
uchar a; /*temporary char*/
for ( i = 0; i < X_len; i += 4)
{
a = X[i];
X[i] = X[i+3];
X[i+3] = a;
a = X[i+1];
X[i+1] = X[i+2];
X[i+2] = a;
}
/*#endif*/ /*kz*/
}
/****************************************************************************
* NAME: void ByteSwap (uchar *array,
* u_int16_t X_len )
*
* DESCRIPTION: Perform byte reversal on an array of longword or shortword.
*
* INPUTS:
* PARAMETERS:
* uchar *X Pointer to array
* u_int16_t X_len Number of bytes
* OUTPUT:
* uchar *X Pointer to array
*
* REVISION HISTORY:
*
* 24 Sep 94 KPZ Initial release
* 14 Oct 94 GKL Second version (big endian support)
*
****************************************************************************/
{
#ifdef ORD_16
u_int16_t i; /*counter*/
uchar a; /*tempriory char for revers*/
for ( i = 0; i < X_len; i += 2)
{
a = X[i];
X[i] = X[i+1];
X[i+1] = a;
}
#endif
#ifdef ORD_32
ByteSwap32(X,X_len);
#endif
}
/*kz longbyte deleted */
/****************************************************************************
* NAME: void WordSwap (uchar *array,
* u_int16_t X_len )
*
* DESCRIPTION: Perform short reversal on an array of longword.
*
* INPUTS:
* PARAMETERS:
* uchar *X Pointer to array
* u_int16_t X_len Number of bytes
* OUTPUT:
* uchar *X Pointer to array
*
* REVISION HISTORY:
*
* 14 Oct 94 GKL Initial release
*
****************************************************************************/
{
u_int16_t i; /*counter*/
u_int16_t a; /*tempriory u_int16_t*/
for ( i = 0; i < X_len; i += 4)
{
a = *(u_int16_t*)(&X[i]);
*(u_int16_t*)(&X[i+2])=a;
}
}
{
u_int16_t i;
{
}
}
{
}