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/*
//
//  Purpose:
//     Cryptography Primitive.
//     Ciper-based Message Authentication Code (CMAC) see SP800-38B
//     Internal Definitions and Internal Functions Prototypes
//
*/

#if !defined(_PCP_CMAC_H)
#define _PCP_CMAC_H

#include "pcprij.h"


/*
// Rijndael128 based CMAC context
*/
struct _cpAES_CMAC {
   IppCtxId idCtx;              /* CMAC  identifier              */
   int      index;              /* internal buffer entry (free)  */
   int      dummy[2];           /* align-16                      */
   Ipp8u    k1[MBS_RIJ128];     /* k1 subkey                     */
   Ipp8u    k2[MBS_RIJ128];     /* k2 subkey                     */
   Ipp8u    mBuffer[MBS_RIJ128];/* buffer                        */
   Ipp8u    mMAC[MBS_RIJ128];   /* intermediate digest           */
   __ALIGN16                    /* aligned AES context           */
   IppsRijndael128Spec mCipherCtx;
};

/* alignment */
//#define CMACRIJ_ALIGNMENT (RIJ_ALIGNMENT)
#define AESCMAC_ALIGNMENT  (RIJ_ALIGNMENT)

/*
// Useful macros
*/
#define CMAC_ID(stt)      ((stt)->idCtx)
#define CMAC_INDX(stt)    ((stt)->index)
#define CMAC_K1(stt)      ((stt)->k1)
#define CMAC_K2(stt)      ((stt)->k2)
#define CMAC_BUFF(stt)    ((stt)->mBuffer)
#define CMAC_MAC(stt)     ((stt)->mMAC)
#define CMAC_CIPHER(stt)  ((stt)->mCipherCtx)

/* valid context ID */
#define VALID_AESCMAC_ID(ctx) (CMAC_ID((ctx))==idCtxCMAC)

#endif /* _PCP_CMAC_H */