/*************************************************************************
* Copyright (C) 2013 Intel Corporation
*
* Licensed under the Apache License,  Version 2.0 (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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law  or agreed  to  in  writing,  software
* distributed under  the License  is  distributed  on  an  "AS IS"  BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the  specific  language  governing  permissions  and
* limitations under the License.
*************************************************************************/

/* 
// 
//  Purpose:
//     Cryptography Primitive.
//     AES encryption/decryption (CBC mode)
//     AES encryption/decryption (CBC-CS mode)
// 
//  Contents:
//        ippsAESEncryptCBC()
//
*/

#include "owndefs.h"
#include "owncp.h"
#include "pcpaesm.h"
#include "pcptool.h"
#include "pcpaes_cbc_encrypt.h"

#if (_ALG_AES_SAFE_==_ALG_AES_SAFE_COMPACT_SBOX_)
#  include "pcprijtables.h"
#endif

/*F*
//    Name: ippsAESEncryptCBC
//
// Purpose: AES-CBC encryption.
//
// Returns:                Reason:
//    ippStsNullPtrErr        pCtx == NULL
//                            pSrc == NULL
//                            pDst == NULL
//                            pIV  == NULL
//    ippStsContextMatchErr   !VALID_AES_ID()
//    ippStsLengthErr         len <1
//    ippStsUnderRunErr       0!=(dataLen%MBS_RIJ128)
//    ippStsNoErr             no errors
//
// Parameters:
//    pSrc        pointer to the source data buffer
//    pDst        pointer to the target data buffer
//    len         input/output buffer length (in bytes)
//    pCtx        pointer to the AES context
//    pIV         pointer to the initialization vector
//
*F*/
IPPFUN(IppStatus, ippsAESEncryptCBC,(const Ipp8u* pSrc, Ipp8u* pDst, int len,
                                     const IppsAESSpec* pCtx,
                                     const Ipp8u* pIV))
{
   /* test context */
   IPP_BAD_PTR1_RET(pCtx);
   /* test the context ID */
   IPP_BADARG_RET(!VALID_AES_ID(pCtx), ippStsContextMatchErr);

   /* test source, target buffers and initialization pointers */
   IPP_BAD_PTR3_RET(pSrc, pIV, pDst);
   /* test stream length */
   IPP_BADARG_RET((len<1), ippStsLengthErr);
   /* test stream integrity */
   IPP_BADARG_RET((len&(MBS_RIJ128-1)), ippStsUnderRunErr);

   /* do encryption */
   cpEncryptAES_cbc(pIV, pSrc, pDst, len/MBS_RIJ128, pCtx);

   return ippStsNoErr;
}
