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     40 
     41 /*
     42 //
     43 //  Purpose:
     44 //     Cryptography Primitive.
     45 //     Internal Definitions and
     46 //     Internal DES based Encrypt/Decrypt Function Prototypes
     47 //
     48 //
     49 */
     50 
     51 
     52 #if !defined(_PCP_DES_H)
     53 #define _PCP_DES_H
     54 
     55 
     56 /*
     57 // really DES round key saved in terms of pear of 24-bit half mentioned in FIPS 46-3
     58 */
     59 typedef Ipp64u RoundKeyDES;
     60 typedef Ipp32u HalfRoundKeyDES;
     61 
     62 /*
     63 // DES context
     64 */
     65 struct _cpDES {
     66    IppCtxId     idCtx;        /* DES spec identifier           */
     67    Ipp32u       dummy;        /* alignment only (linux problem)*/
     68    RoundKeyDES  enc_keys[16]; /* array of keys for encryprion  */
     69    RoundKeyDES  dec_keys[16]; /* array of keys for decryprion  */
     70 };
     71 
     72 /* alignment */
     73 #define DES_ALIGNMENT ((int)(sizeof(Ipp64u)))
     74 
     75 #define MBS_DES   (8)      /* data block (bytes) */
     76 
     77 /*
     78 // Useful macros
     79 */
     80 #define DES_ID(ctx)        ((ctx)->idCtx)
     81 #define DES_EKEYS(ctx)     ((ctx)->enc_keys)
     82 #define DES_DKEYS(ctx)     ((ctx)->dec_keys)
     83 #define DES_ID_TEST(ctx)   (DES_ID((ctx))==idCtxDES)
     84 
     85 /*
     86 // Internal Tables
     87 */
     88 #define MITIGATED    (4)
     89 
     90 #define IMPLEMENTATION MITIGATED
     91 
     92 
     93 #if (IMPLEMENTATION == MITIGATED)
     94    extern const __ALIGN64 Ipp32u DESspbox[16*16];
     95 #endif
     96 
     97 
     98 /*
     99 // internal functions
    100 */
    101 #define SetKey_DES OWNAPI(SetKey_DES)
    102    void SetKey_DES(const Ipp8u* pKey, IppsDESSpec* pCtx);
    103 
    104 #define Cipher_DES OWNAPI(Cipher_DES)
    105  Ipp64u Cipher_DES(Ipp64u inpBlk, const RoundKeyDES* pRKey, const Ipp32u spbox[]);
    106 
    107 #define ENCRYPT_DES(blk, pCtx)   Cipher_DES((blk), DES_EKEYS((pCtx)), DESspbox)
    108 #define DECRYPT_DES(blk, pCtx)   Cipher_DES((blk), DES_DKEYS((pCtx)), DESspbox)
    109 
    110 /* TDES prototypes */
    111 #define ECB_TDES OWNAPI(ECB_TDES)
    112    void ECB_TDES(const Ipp64u* pSrc, Ipp64u* pDst, int nBlocks, const RoundKeyDES* pRKey[3], const Ipp32u spbox[]);
    113 #define EncryptCBC_TDES OWNAPI(EncryptCBC_TDES)
    114    void EncryptCBC_TDES(const Ipp64u* pSrc, Ipp64u* pDst, int nBlocks, const RoundKeyDES* pRKey[3], Ipp64u iv, const Ipp32u spbox[]);
    115 #define DecryptCBC_TDES OWNAPI(DecryptCBC_TDES)
    116    void DecryptCBC_TDES(const Ipp64u* pSrc, Ipp64u* pDst, int nBlocks, const RoundKeyDES* pRKey[3], Ipp64u iv, const Ipp32u spbox[]);
    117 
    118 #endif /* _PCP_DES_H */
    119