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40 
41 /*
42 //
43 //  Purpose:
44 //     Cryptography Primitive.
45 //     Internal Definitions and
46 //     Internal Pseudo Random Generator Function Prototypes
47 //
48 */
49 
50 #if !defined(_CP_PRNG_H)
51 #define _CP_PRNG_H
52 
53 /*
54 // Pseudo-random generation context
55 */
56 
57 #define MAX_XKEY_SIZE       512
58 #define DEFAULT_XKEY_SIZE   512 /* must be >=160 || <=512 */
59 
60 struct _cpPRNG {
61    IppCtxId    idCtx;                                 /* PRNG identifier            */
62    cpSize      seedBits;                              /* secret seed-key bitsize    */
63    BNU_CHUNK_T Q[BITS_BNU_CHUNK(160)];                /* modulus                    */
64    BNU_CHUNK_T T[BITS_BNU_CHUNK(160)];                /* parameter of SHA_G() funct */
65    BNU_CHUNK_T xAug[BITS_BNU_CHUNK(MAX_XKEY_SIZE)];   /* optional entropy augment   */
66    BNU_CHUNK_T xKey[BITS_BNU_CHUNK(MAX_XKEY_SIZE)];   /* secret seed-key            */
67 };
68 
69 /* alignment */
70 #define PRNG_ALIGNMENT ((int)(sizeof(void*)))
71 
72 #define RAND_ID(ctx)       ((ctx)->idCtx)
73 #define RAND_SEEDBITS(ctx) ((ctx)->seedBits)
74 #define RAND_Q(ctx)        ((ctx)->Q)
75 #define RAND_T(ctx)        ((ctx)->T)
76 #define RAND_XAUGMENT(ctx) ((ctx)->xAug)
77 #define RAND_XKEY(ctx)     ((ctx)->xKey)
78 
79 #define RAND_VALID_ID(ctx)  (RAND_ID((ctx))==idCtxPRNG)
80 
81 #define cpPRNGen OWNAPI(cpPRNGen)
82 int cpPRNGen(Ipp32u* pBuffer, cpSize bitLen, IppsPRNGState* pCtx);
83 
84 #define cpPRNGenPattern OWNAPI(cpPRNGenPattern)
85 int cpPRNGenPattern(BNU_CHUNK_T* pRand, int bitSize,
86                     BNU_CHUNK_T botPattern, BNU_CHUNK_T topPattern,
87                     IppBitSupplier rndFunc, void* pRndParam);
88 
89 #define cpPRNGenRange OWNAPI(cpPRNGenRange)
90 int cpPRNGenRange(BNU_CHUNK_T* pRand,
91             const BNU_CHUNK_T* pLo, cpSize loLen,
92             const BNU_CHUNK_T* pHi, cpSize hiLen,
93                   IppBitSupplier rndFunc, void* pRndParam);
94 
95 #endif /* _CP_PRNG_H */
96