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src/secp256k1/src/group.h

/********************************************************************** /**********************************************************************
* Copyright (c) 2013, 2014 Pieter Wuille * * Copyright (c) 2013, 2014 Pieter Wuille *
* Distributed under the MIT software license, see the accompanying * * Distributed under the MIT software license, see the accompanying *
* file COPYING or http://www.opensource.org/licenses/mit-license.php.* * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
**********************************************************************/ **********************************************************************/
#ifndef _SECP256K1_GROUP_ #ifndef SECP256K1_GROUP_H
#define _SECP256K1_GROUP_ #define SECP256K1_GROUP_H
#include "num.h" #include "num.h"
#include "field.h" #include "field.h"
/** A group element of the secp256k1 curve, in affine coordinates. */ /** A group element of the secp256k1 curve, in affine coordinates. */
typedef struct { typedef struct {
secp256k1_fe x; secp256k1_fe x;
secp256k1_fe y; secp256k1_fe y;
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static void secp256k1_ge_from_storage(secp256k1_ge *r, const secp256k1_ge_storage *a); static void secp256k1_ge_from_storage(secp256k1_ge *r, const secp256k1_ge_storage *a);
/** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. */ /** If flag is true, set *r equal to *a; otherwise leave it. Constant-time. */
static void secp256k1_ge_storage_cmov(secp256k1_ge_storage *r, const secp256k1_ge_storage *a, int flag); static void secp256k1_ge_storage_cmov(secp256k1_ge_storage *r, const secp256k1_ge_storage *a, int flag);
/** Rescale a jacobian point by b which must be non-zero. Constant-time. */ /** Rescale a jacobian point by b which must be non-zero. Constant-time. */
static void secp256k1_gej_rescale(secp256k1_gej *r, const secp256k1_fe *b); static void secp256k1_gej_rescale(secp256k1_gej *r, const secp256k1_fe *b);
#endif #endif /* SECP256K1_GROUP_H */