/*************************************************************************
 *
 *  $RCSfile: cipher.h,v $
 *
 *  $Revision: 1.4 $
 *
 *  last change: $Author: mhu $ $Date: 2001/11/29 19:12:42 $
 *
 *  The Contents of this file are made available subject to the terms of
 *  either of the following licenses
 *
 *         - GNU Lesser General Public License Version 2.1
 *         - Sun Industry Standards Source License Version 1.1
 *
 *  Sun Microsystems Inc., October, 2000
 *
 *  GNU Lesser General Public License Version 2.1
 *  =============================================
 *  Copyright 2000 by Sun Microsystems, Inc.
 *  901 San Antonio Road, Palo Alto, CA 94303, USA
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License version 2.1, as published by the Free Software Foundation.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 *  MA  02111-1307  USA
 *
 *
 *  Sun Industry Standards Source License Version 1.1
 *  =================================================
 *  The contents of this file are subject to the Sun Industry Standards
 *  Source 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.openoffice.org/license.html.
 *
 *  Software provided under this License is provided on an "AS IS" basis,
 *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
 *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
 *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
 *  See the License for the specific provisions governing your rights and
 *  obligations concerning the Software.
 *
 *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
 *
 *  Copyright: 2000 by Sun Microsystems, Inc.
 *
 *  All Rights Reserved.
 *
 *  Contributor(s): Matthias Huetsch <matthias.huetsch@sun.com>
 *
 *
 ************************************************************************/

#ifndef _RTL_CIPHER_H_
#define _RTL_CIPHER_H_ "$Revision: 1.4 $"

#ifndef _SAL_TYPES_H_
#include <sal/types.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif

/*========================================================================
 *
 * rtlCipher interface.
 *
 *======================================================================*/
/** Cipher Handle opaque type.
 */
typedef void* rtlCipher;


/** Cipher Algorithm enumeration.
	@see rtl_cipher_create()
 */
enum __rtl_CipherAlgorithm
{
	rtl_Cipher_AlgorithmBF,
	rtl_Cipher_AlgorithmInvalid,
	rtl_Cipher_Algorithm_FORCE_EQUAL_SIZE = SAL_MAX_ENUM
};

/** Cipher Algorithm type.
 */
typedef enum __rtl_CipherAlgorithm rtlCipherAlgorithm;


/** Cipher Mode enumeration.
	@see rtl_cipher_create()
 */
enum __rtl_CipherMode
{
	rtl_Cipher_ModeECB,
	rtl_Cipher_ModeCBC,
	rtl_Cipher_ModeStream,
	rtl_Cipher_ModeInvalid,
	rtl_Cipher_Mode_FORCE_EQUAL_SIZE = SAL_MAX_ENUM
};

/** Cipher Mode type.
 */
typedef enum __rtl_CipherMode rtlCipherMode;


/** Cipher Direction enumeration.
	@see rtl_cipher_init()
 */
enum __rtl_CipherDirection
{
	rtl_Cipher_DirectionBoth,
	rtl_Cipher_DirectionDecode,
	rtl_Cipher_DirectionEncode,
	rtl_Cipher_DirectionInvalid,
	rtl_Cipher_Direction_FORCE_EQUAL_SIZE = SAL_MAX_ENUM
};

/** Cipher Direction type.
 */
typedef enum __rtl_CipherDirection rtlCipherDirection;


/** Error Code enumeration.
 */
enum __rtl_CipherError
{
	rtl_Cipher_E_None,
	rtl_Cipher_E_Argument,
	rtl_Cipher_E_Algorithm,
	rtl_Cipher_E_Direction,
	rtl_Cipher_E_Mode,
	rtl_Cipher_E_BufferSize,
	rtl_Cipher_E_Memory,
	rtl_Cipher_E_Unknown,
	rtl_Cipher_E_FORCE_EQUAL_SIZE = SAL_MAX_ENUM
};

/** Error Code type.
 */
typedef enum __rtl_CipherError rtlCipherError;


/** Create a cipher handle for the given algorithm and mode.
    @see rtlCipherAlgorithm
    @see rtlCipherMode

	@param  Algorithm [in] cipher algorithm.
	@param  Mode      [in] cipher mode.
	@return Cipher handle, or 0 upon failure.
 */
rtlCipher SAL_CALL rtl_cipher_create (
	rtlCipherAlgorithm Algorithm,
	rtlCipherMode      Mode
) SAL_THROW_EXTERN_C();


/** Inititialize a cipher for the given direction.
    @see rtlCipherDirection

	@param  Cipher    [in] cipher handle.
	@param  Direction [in] cipher direction.
	@param  pKeyData  [in] key material buffer.
	@param  nKeyLen   [in] key material length in bytes.
	@param  pArgData  [in] initialization vector buffer.
	@param  nArgLen   [in] initialization vector length in bytes.
	@return rtl_Cipher_E_None upon success.
 */
rtlCipherError SAL_CALL rtl_cipher_init (
	rtlCipher           Cipher,
	rtlCipherDirection  Direction,
	const sal_uInt8    *pKeyData, sal_uInt32 nKeyLen,
	const sal_uInt8    *pArgData, sal_uInt32 nArgLen
) SAL_THROW_EXTERN_C();


/** Encode a buffer under a given cipher algorithm.
    @precond Initialized for a compatible cipher direction.
	@see     rtl_cipher_init()

	@param  Cipher  [in]  cipher handle.
	@param  pData   [in]  plaintext buffer.
	@param  nDatLen [in]  plaintext length in bytes.
	@param  pBuffer [out] ciphertext buffer.
	@param  nBufLen [in]  ciphertext length in bytes.
	@return rtl_Cipher_E_None upon success.
 */
rtlCipherError SAL_CALL rtl_cipher_encode (
	rtlCipher   Cipher,
	const void *pData,   sal_uInt32 nDatLen,
	sal_uInt8  *pBuffer, sal_uInt32 nBufLen
) SAL_THROW_EXTERN_C();


/** Decode a buffer under a given cipher algorithm.
    @precond Initialized for a compatible cipher direction.
	@see     rtl_cipher_init()

	@param  Cipher  [in]  cipher handle.
	@param  pData   [in]  ciphertext buffer.
	@param  nDatLen [in]  ciphertext length in bytes.
	@param  pBuffer [out] plaintext buffer.
	@param  nBufLen [in]  plaintext length in bytes.
	@return rtl_Cipher_E_None upon success.
 */
rtlCipherError SAL_CALL rtl_cipher_decode (
	rtlCipher   Cipher,
	const void *pData,   sal_uInt32 nDatLen,
	sal_uInt8  *pBuffer, sal_uInt32 nBufLen
) SAL_THROW_EXTERN_C();


/** Destroy a cipher handle.
	@param  Cipher [in] cipher handle to be destroyed.
	@return None. Cipher handle destroyed and invalid.
 */
void SAL_CALL rtl_cipher_destroy (
	rtlCipher Cipher
) SAL_THROW_EXTERN_C();


/*========================================================================
 *
 * rtl_cipherBF (Blowfish) interface.
 *
 *======================================================================*/
/** Create a Blowfish cipher handle for the given mode.
    @descr The Blowfish block cipher algorithm is specified in
	Bruce Schneier: Applied Cryptography, 2nd edition, ch. 14.3

	@see rtl_cipher_create()
 */
rtlCipher SAL_CALL rtl_cipher_createBF (
	rtlCipherMode Mode
) SAL_THROW_EXTERN_C();


/** Inititialize a Blowfish cipher for the given direction.
	@see rtl_cipher_init()
 */
rtlCipherError SAL_CALL rtl_cipher_initBF (
	rtlCipher          Cipher,
	rtlCipherDirection Direction,
	const sal_uInt8 *pKeyData, sal_uInt32 nKeyLen,
	const sal_uInt8 *pArgData, sal_uInt32 nArgLen
) SAL_THROW_EXTERN_C();


/** Encode a buffer under the Blowfish cipher algorithm.
	@see rtl_cipher_encode()
 */
rtlCipherError SAL_CALL rtl_cipher_encodeBF (
	rtlCipher   Cipher,
	const void *pData,   sal_uInt32 nDatLen,
	sal_uInt8  *pBuffer, sal_uInt32 nBufLen
) SAL_THROW_EXTERN_C();


/** Decode a buffer under the Blowfish cipher algorithm.
	@see rtl_cipher_decode()
 */
rtlCipherError SAL_CALL rtl_cipher_decodeBF (
	rtlCipher   Cipher,
	const void *pData,   sal_uInt32 nDatLen,
	sal_uInt8  *pBuffer, sal_uInt32 nBufLen
) SAL_THROW_EXTERN_C();


/** Destroy a Blowfish cipher handle.
	@see rtl_cipher_destroy()
 */
void SAL_CALL rtl_cipher_destroyBF (
	rtlCipher Cipher
) SAL_THROW_EXTERN_C();


/*========================================================================
 *
 * The End.
 *
 *======================================================================*/

#ifdef __cplusplus
}
#endif

#endif /* !_RTL_CIPHER_H_ */

