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/*!
 * \file
 * \brief Finite field private interface.
 */

#ifndef EPID_COMMON_MATH_SRC_FINITEFIELD_INTERNAL_H_
#define EPID_COMMON_MATH_SRC_FINITEFIELD_INTERNAL_H_

#include "epid/common/math/bignum.h"
#include "epid/common/math/src/bignum-internal.h"
#include "ext/ipp/include/ippcp.h"

/// Finite Field
struct FiniteField {
  /// Internal implementation of finite field
  IppsGFpState* ipp_ff;
  /// Previous finitefield
  struct FiniteField* ground_ff;
  /// Degree of basic field
  int basic_degree;
  /// Degree of current field
  int ground_degree;
  /// Size of element in BNU units
  int element_len;
  /// Minimum number of bytes needed to serialize an element
  size_t element_strlen_required;
  /*!
  Galois field prime or free standing coefficient of
  irreducible polynomial of finite field extension.
  */
  BigNum* modulus_0;
};

/// Finite Field Element
struct FfElement {
  /// Internal implementation of finite field element
  IppsGFpElement* ipp_ff_elem;
  /// Element size of Finite Field element
  int element_len;
  /// Degree of Finite Field element
  int degree;
};

EpidStatus SetFfElementOctString(ConstOctStr ff_elem_str, int strlen,
                                 struct FfElement* ff_elem,
                                 struct FiniteField* ff);

#endif  // EPID_COMMON_MATH_SRC_FINITEFIELD_INTERNAL_H_