366 lines
8.9 KiB
C
366 lines
8.9 KiB
C
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/*
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* Copyright (c) 2012-2020 MIRACL UK Ltd.
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*
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* This file is part of MIRACL Core
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* (see https://github.com/miracl/core).
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef FP8_YYY_H
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#define FP8_YYY_H
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#include "fp4_YYY.h"
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#include "config_curve_ZZZ.h"
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using namespace core;
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namespace YYY {
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/**
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@brief FP8 Structure - towered over two FP4
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*/
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typedef struct
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{
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FP4 a; /**< real part of FP8 */
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FP4 b; /**< imaginary part of FP8 */
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} FP8;
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/* FP8 prototypes */
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/** @brief Tests for FP8 equal to zero
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*
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@param x FP8 number to be tested
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@return 1 if zero, else returns 0
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*/
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extern int FP8_iszilch(FP8 *x);
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/** @brief Tests for lexically larger
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*
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@param x FP8 number to be tested if larger than -x
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@return 1 if larger, else returns 0
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*/
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extern int FP8_islarger(FP8 *x);
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/** @brief Serialize in FP8
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*
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@param b buffer for output
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@param x FP8 number to be serialized
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*/
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extern void FP8_toBytes(char *b,FP8 *x);
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/** @brief Serialize out FP8
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*
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@param x FP8 number to be serialized
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@param b buffer for input
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*/
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extern void FP8_fromBytes(FP8 *x,char *b);
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/** @brief Tests for FP8 equal to unity
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*
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@param x FP8 number to be tested
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@return 1 if unity, else returns 0
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*/
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extern int FP8_isunity(FP8 *x);
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/** @brief Tests for equality of two FP8s
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*
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@param x FP8 instance to be compared
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@param y FP8 instance to be compared
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@return 1 if x=y, else returns 0
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*/
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extern int FP8_equals(FP8 *x, FP8 *y);
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/** @brief Tests for FP8 having only a real part and no imaginary part
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*
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@param x FP8 number to be tested
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@return 1 if real, else returns 0
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*/
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extern int FP8_isreal(FP8 *x);
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/** @brief Initialise FP8 from two FP4s
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*
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@param x FP8 instance to be initialised
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@param a FP4 to form real part of FP8
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@param b FP4 to form imaginary part of FP8
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*/
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extern void FP8_from_FP4s(FP8 *x, FP4 *a, FP4 *b);
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/** @brief Initialise FP8 from single FP4
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*
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Imaginary part is set to zero
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@param x FP8 instance to be initialised
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@param a FP4 to form real part of FP8
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*/
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extern void FP8_from_FP4(FP8 *x, FP4 *a);
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/** @brief Initialise FP8 from single FP4
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*
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real part is set to zero
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@param x FP8 instance to be initialised
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@param a FP4 to form imaginary part of FP8
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*/
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extern void FP8_from_FP4H(FP8 *x, FP4 *a);
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/** @brief Initialise FP8 from single FP
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*
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@param x FP8 instance to be initialised
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@param a FP to form real part of FP8
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*/
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extern void FP8_from_FP(FP8 *x, FP *a);
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/** @brief Copy FP8 to another FP8
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*
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@param x FP8 instance, on exit = y
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@param y FP8 instance to be copied
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*/
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extern void FP8_copy(FP8 *x, FP8 *y);
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/** @brief Set FP8 to zero
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*
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@param x FP8 instance to be set to zero
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*/
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extern void FP8_zero(FP8 *x);
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/** @brief Set FP8 to unity
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*
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@param x FP8 instance to be set to one
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*/
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extern void FP8_one(FP8 *x);
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/** @brief Sign of FP8
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*
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@param x FP8 instance
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@return "sign" of FP8
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*/
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extern int FP8_sign(FP8 *x);
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/** @brief Negation of FP8
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*
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@param x FP8 instance, on exit = -y
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@param y FP8 instance
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*/
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extern void FP8_neg(FP8 *x, FP8 *y);
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/** @brief Conjugation of FP8
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*
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If y=(a,b) on exit x=(a,-b)
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@param x FP8 instance, on exit = conj(y)
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@param y FP8 instance
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*/
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extern void FP8_conj(FP8 *x, FP8 *y);
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/** @brief Negative conjugation of FP8
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*
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If y=(a,b) on exit x=(-a,b)
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@param x FP8 instance, on exit = -conj(y)
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@param y FP8 instance
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*/
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extern void FP8_nconj(FP8 *x, FP8 *y);
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/** @brief addition of two FP8s
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*
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@param x FP8 instance, on exit = y+z
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@param y FP8 instance
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@param z FP8 instance
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*/
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extern void FP8_add(FP8 *x, FP8 *y, FP8 *z);
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/** @brief subtraction of two FP8s
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*
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@param x FP8 instance, on exit = y-z
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@param y FP8 instance
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@param z FP8 instance
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*/
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extern void FP8_sub(FP8 *x, FP8 *y, FP8 *z);
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/** @brief Multiplication of an FP8 by an FP4
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*
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@param x FP8 instance, on exit = y*a
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@param y FP8 instance
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@param a FP4 multiplier
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*/
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extern void FP8_pmul(FP8 *x, FP8 *y, FP4 *a);
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/** @brief Multiplication of an FP8 by an FP2
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*
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@param x FP8 instance, on exit = y*a
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@param y FP8 instance
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@param a FP2 multiplier
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*/
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extern void FP8_qmul(FP8 *x, FP8 *y, FP2 *a);
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/** @brief Multiplication of an FP8 by an FP
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*
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@param x FP8 instance, on exit = y*a
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@param y FP8 instance
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@param a FP multiplier
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*/
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extern void FP8_tmul(FP8 *x, FP8 *y, FP *a);
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/** @brief Multiplication of an FP8 by a small integer
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*
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@param x FP8 instance, on exit = y*i
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@param y FP8 instance
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@param i an integer
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*/
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extern void FP8_imul(FP8 *x, FP8 *y, int i);
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/** @brief Squaring an FP8
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*
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@param x FP8 instance, on exit = y^2
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@param y FP8 instance
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*/
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extern void FP8_sqr(FP8 *x, FP8 *y);
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/** @brief Multiplication of two FP8s
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*
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@param x FP8 instance, on exit = y*z
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@param y FP8 instance
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@param z FP8 instance
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*/
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extern void FP8_mul(FP8 *x, FP8 *y, FP8 *z);
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/** @brief Inverting an FP8
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*
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@param x FP8 instance, on exit = 1/y
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@param y FP8 instance
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@param h optional input hint
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*/
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extern void FP8_inv(FP8 *x, FP8 *y, FP *h);
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/** @brief Formats and outputs an FP8 to the console
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*
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@param x FP8 instance to be printed
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*/
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extern void FP8_output(FP8 *x);
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/** @brief Divide an FP8 by 2
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*
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@param x FP8 instance, on exit = y/2
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@param y FP8 instance
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*/
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extern void FP8_div2(FP8 *x, FP8 *y);
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/** @brief Formats and outputs an FP8 to the console in raw form (for debugging)
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*
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@param x FP8 instance to be printed
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*/
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extern void FP8_rawoutput(FP8 *x);
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/** @brief multiplies an FP8 instance by irreducible polynomial sqrt(1+sqrt(-1))
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*
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@param x FP8 instance, on exit = sqrt(1+sqrt(-1)*x
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*/
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extern void FP8_times_i(FP8 *x);
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/** @brief multiplies an FP8 instance by irreducible polynomial (1+sqrt(-1))
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*
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@param x FP8 instance, on exit = (1+sqrt(-1)*x
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*/
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extern void FP8_times_i2(FP8 *x);
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/** @brief Normalises the components of an FP8
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*
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@param x FP8 instance to be normalised
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*/
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extern void FP8_norm(FP8 *x);
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/** @brief Reduces all components of possibly unreduced FP8 mod Modulus
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*
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@param x FP8 instance, on exit reduced mod Modulus
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*/
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extern void FP8_reduce(FP8 *x);
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/** @brief Raises an FP8 to the power of a BIG
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*
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@param x FP8 instance, on exit = y^b
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@param y FP8 instance
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@param b BIG number
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*/
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extern void FP8_pow(FP8 *x, FP8 *y, XXX::BIG b);
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/** @brief Raises an FP8 to the power of the internal modulus p, using the Frobenius
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*
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@param x FP8 instance, on exit = x^p
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@param f FP2 precalculated Frobenius constant
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*/
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extern void FP8_frob(FP8 *x, FP2 *f);
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/** @brief Calculates the XTR addition function r=w*x-conj(x)*y+z
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*
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@param r FP8 instance, on exit = w*x-conj(x)*y+z
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@param w FP8 instance
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@param x FP8 instance
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@param y FP8 instance
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@param z FP8 instance
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*/
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extern void FP8_xtr_A(FP8 *r, FP8 *w, FP8 *x, FP8 *y, FP8 *z);
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/** @brief Calculates the XTR doubling function r=x^2-2*conj(x)
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*
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@param r FP8 instance, on exit = x^2-2*conj(x)
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@param x FP8 instance
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*/
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extern void FP8_xtr_D(FP8 *r, FP8 *x);
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/** @brief Calculates FP8 trace of an FP12 raised to the power of a BIG number
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*
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XTR single exponentiation
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@param r FP8 instance, on exit = trace(w^b)
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@param x FP8 instance, trace of an FP12 w
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@param b BIG number
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*/
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extern void FP8_xtr_pow(FP8 *r, FP8 *x, XXX::BIG b);
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/** @brief Calculates FP8 trace of c^a.d^b, where c and d are derived from FP8 traces of FP12s
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*
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XTR double exponentiation
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Assumes c=tr(x^m), d=tr(x^n), e=tr(x^(m-n)), f=tr(x^(m-2n))
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@param r FP8 instance, on exit = trace(c^a.d^b)
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@param c FP8 instance, trace of an FP12
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@param d FP8 instance, trace of an FP12
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@param e FP8 instance, trace of an FP12
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@param f FP8 instance, trace of an FP12
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@param a BIG number
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@param b BIG number
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*/
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extern void FP8_xtr_pow2(FP8 *r, FP8 *c, FP8 *d, FP8 *e, FP8 *f, XXX::BIG a, XXX::BIG b);
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/** @brief Test FP8 for QR
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*
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Square root
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@param r FP8 instance
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@param h optional generated hint
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@return 1 r is a QR, otherwise 0
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*/
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extern int FP8_qr(FP8 *r, FP *h);
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/** @brief Calculate square root of an FP8
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*
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Square root
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@param r FP8 instance, on exit = sqrt(x)
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@param x FP8 instance
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@param h optional input hint
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*/
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extern void FP8_sqrt(FP8 *r, FP8 *x, FP *h);
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/** @brief Conditional copy of FP8 number
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*
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Conditionally copies second parameter to the first (without branching)
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@param x FP8 instance, set to y if s!=0
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@param y another FP8 instance
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@param s copy only takes place if not equal to 0
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*/
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extern void FP8_cmove(FP8 *x, FP8 *y, int s);
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/** @brief Divide FP8 number by QNR
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*
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Divide FP8 by the QNR
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@param x FP8 instance
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*/
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extern void FP8_div_i(FP8 *x);
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/** @brief Generate random FP8
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*
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@param x random FP8 number
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@param rng random number generator
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*/
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extern void FP8_rand(FP8 *x, core::csprng *rng);
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}
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#endif
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