OcRngInternals.h

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#ifndef OC_RNG_INTERNALS_H
#define OC_RNG_INTERNALS_H
 
#include <Library/OcCryptoLib.h>
 
UINT64
EFIAPI
AsmAddRngJitter (
  IN UINT64  Value
  );
 
//
// Limited retry number when valid random data is returned.
// Uses the recommended value defined in Section 7.3.17 of "Intel 64 and IA-32
// Architectures Software Developer's Mannual".
//
#define RDRAND_RETRY_LIMIT  10
 
//
// Maximum amount of bytes emitted by PRNG before next reseed.
//
#define MAX_BYTES_TO_EMIT  1600000
 
//
// Maximum bytes in one buffer.
//
#define MAX_BYTES_IN_BUF  (16*64)
 
typedef struct OC_RNG_CONTEXT_ {
  //
  // Hardware random number generator available.
  //
  BOOLEAN           HardwareRngAvailable;
  //
  // Done initialising pseudo random number generator.
  //
  BOOLEAN           PrngInitialised;
  //
  // Amount of bytes to emit before next reseed.
  //
  UINT32            BytesTillReseed;
  //
  // Amount of bytes in the current buffer.
  //
  UINT32            BytesInBuffer;
  //
  // Current CPRNG buffer.
  //
  UINT8             Buffer[MAX_BYTES_IN_BUF];
  //
  // ChaCha context.
  //
  CHACHA_CONTEXT    ChaCha;
} OC_RNG_CONTEXT;
 
#endif // OC_RNG_INTERNALS_H