232 lines
6.6 KiB
C++
232 lines
6.6 KiB
C++
/*
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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 FP48_BLS48556_H
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#define FP48_BLS48556_H
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#include "fp16_BLS48556.h"
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using namespace core;
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namespace BLS48556 {
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/**
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@brief FP12 Structure - towered over three FP16
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*/
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typedef struct
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{
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FP16 a; /**< first part of FP12 */
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FP16 b; /**< second part of FP12 */
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FP16 c; /**< third part of FP12 */
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int type;
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} FP48;
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extern const B560_58::BIG Fra; /**< real part of BN curve Frobenius Constant */
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extern const B560_58::BIG Frb; /**< imaginary part of BN curve Frobenius Constant */
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/* FP48 prototypes */
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/** @brief Tests for FP48 equal to zero
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*
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@param x FP48 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 FP48_iszilch(FP48 *x);
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/** @brief Tests for FP48 equal to unity
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*
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@param x FP48 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 FP48_isunity(FP48 *x);
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/** @brief Copy FP48 to another FP48
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*
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@param x FP48 instance, on exit = y
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@param y FP48 instance to be copied
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*/
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extern void FP48_copy(FP48 *x, FP48 *y);
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/** @brief Set FP48 to unity
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*
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@param x FP48 instance to be set to one
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*/
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extern void FP48_one(FP48 *x);
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/** @brief Set FP48 to zero
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*
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@param x FP48 instance to be set to zero
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*/
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extern void FP48_zero(FP48 *x);
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/** @brief Tests for equality of two FP48s
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*
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@param x FP48 instance to be compared
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@param y FP48 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 FP48_equals(FP48 *x, FP48 *y);
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/** @brief Conjugation of FP48
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*
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If y=(a,b,c) (where a,b,c are its three FP16 components) on exit x=(conj(a),-conj(b),conj(c))
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@param x FP48 instance, on exit = conj(y)
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@param y FP48 instance
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*/
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extern void FP48_conj(FP48 *x, FP48 *y);
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/** @brief Initialise FP48 from single FP16
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*
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Sets first FP16 component of an FP48, other components set to zero
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@param x FP48 instance to be initialised
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@param a FP16 to form first part of FP48
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*/
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extern void FP48_from_FP16(FP48 *x, FP16 *a);
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/** @brief Initialise FP48 from three FP16s
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*
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@param x FP48 instance to be initialised
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@param a FP16 to form first part of FP48
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@param b FP16 to form second part of FP48
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@param c FP16 to form third part of FP48
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*/
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extern void FP48_from_FP16s(FP48 *x, FP16 *a, FP16* b, FP16 *c);
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/** @brief Fast Squaring of an FP48 in "unitary" form
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*
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@param x FP48 instance, on exit = y^2
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@param y FP16 instance, must be unitary
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*/
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extern void FP48_usqr(FP48 *x, FP48 *y);
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/** @brief Squaring an FP48
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*
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@param x FP48 instance, on exit = y^2
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@param y FP48 instance
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*/
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extern void FP48_sqr(FP48 *x, FP48 *y);
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/** @brief Fast multiplication of two sparse FP24s that arises from ATE pairing line functions
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*
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@param x FP48 instance, on exit = x*y
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@param y FP48 instance, of special form
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*/
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extern void FP48_smul(FP48 *x, FP48 *y);
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/** @brief Fast multiplication of what may be sparse multiplicands
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*
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@param x FP48 instance, on exit = x*y
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@param y FP48 instance, of special form
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*/
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extern void FP48_ssmul(FP48 *x, FP48 *y);
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/** @brief Full unconditional Multiplication of two FP24s
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*
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@param x FP48 instance, on exit = x*y
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@param y FP48 instance, the multiplier
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*/
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extern void FP48_mul(FP48 *x, FP48 *y);
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/** @brief Inverting an FP48
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*
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@param x FP48 instance, on exit = 1/y
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@param y FP48 instance
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*/
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extern void FP48_inv(FP48 *x, FP48 *y);
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/** @brief Raises an FP48 to the power of a BIG
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*
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@param r FP48 instance, on exit = y^b
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@param x FP48 instance
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@param b BIG number
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*/
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extern void FP48_pow(FP48 *r, FP48 *x, B560_58::BIG b);
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//extern void FP48_ppow(FP48 *r,FP48 *x,B560_58::BIG b);
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/** @brief Raises an FP48 instance x to a small integer power, side-channel resistant
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*
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@param x FP48 instance, on exit = x^i
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@param i small integer exponent
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@param b maximum number of bits in exponent
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*/
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extern void FP48_pinpow(FP48 *x, int i, int b);
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/** @brief Raises an FP48 instance x to a BIG power, compressed to FP16
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*
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@param c FP16 instance, on exit = x^(e mod r) as FP16
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@param x FP48 input
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@param e BIG exponent
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@param r BIG group order
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*/
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extern void FP48_compow(FP16 *c, FP48 *x, B560_58::BIG e, B560_58::BIG r);
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/** @brief Calculate Pi x[i]^b[i] for i=0 to 15, side-channel resistant
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*
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@param r FP48 instance, on exit = Pi x[i]^b[i] for i=0 to 15
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@param x FP48 array with 16 FP48s
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@param b BIG array of 16 exponents
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*/
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extern void FP48_pow16(FP48 *r, FP48 *x, B560_58::BIG *b);
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/** @brief Raises an FP48 to the power of the internal modulus p, using the Frobenius
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*
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@param x FP48 instance, on exit = x^p^n
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@param f FP2 precalculated Frobenius constant
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@param n power of p
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*/
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extern void FP48_frob(FP48 *x, FP2 *f, int n);
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/** @brief Reduces all components of possibly unreduced FP48 mod Modulus
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*
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@param x FP48 instance, on exit reduced mod Modulus
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*/
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extern void FP48_reduce(FP48 *x);
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/** @brief Normalises the components of an FP48
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*
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@param x FP48 instance to be normalised
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*/
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extern void FP48_norm(FP48 *x);
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/** @brief Formats and outputs an FP48 to the console
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*
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@param x FP48 instance to be printed
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*/
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extern void FP48_output(FP48 *x);
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/** @brief Formats and outputs an FP48 instance to an octet string
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*
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Serializes the components of an FP48 to big-endian base 256 form.
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@param S output octet string
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@param x FP48 instance to be converted to an octet string
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*/
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extern void FP48_toOctet(octet *S, FP48 *x);
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/** @brief Creates an FP48 instance from an octet string
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*
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De-serializes the components of an FP48 to create an FP48 from big-endian base 256 components.
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@param x FP48 instance to be created from an octet string
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@param S input octet string
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*/
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extern void FP48_fromOctet(FP48 *x, octet *S);
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/** @brief Calculate the trace of an FP48
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*
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@param t FP16 trace of x, on exit = tr(x)
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@param x FP48 instance
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*/
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extern void FP48_trace(FP16 *t, FP48 *x);
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/** @brief Conditional copy of FP48 number
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*
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Conditionally copies second parameter to the first (without branching)
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@param x FP48 instance, set to y if s!=0
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@param y another FP48 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 FP48_cmove(FP48 *x, FP48 *y, int s);
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}
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#endif
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