Bitcoin ABC 0.26.3
P2P Digital Currency
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ecmult.h
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1/***********************************************************************
2 * Copyright (c) 2013, 2014, 2017 Pieter Wuille, Andrew Poelstra *
3 * Distributed under the MIT software license, see the accompanying *
4 * file COPYING or https://www.opensource.org/licenses/mit-license.php.*
5 ***********************************************************************/
6
7#ifndef SECP256K1_ECMULT_H
8#define SECP256K1_ECMULT_H
9
10#include "group.h"
11#include "scalar.h"
12#include "scratch.h"
13
14typedef struct {
15 /* For accelerating the computation of a*P + b*G: */
16 secp256k1_ge_storage (*pre_g)[]; /* odd multiples of the generator */
17 secp256k1_ge_storage (*pre_g_128)[]; /* odd multiples of 2^128*generator */
19
26
29
30typedef int (secp256k1_ecmult_multi_callback)(secp256k1_scalar *sc, secp256k1_ge *pt, size_t idx, void *data);
31
44
45#endif /* SECP256K1_ECMULT_H */
secp256k1_context * ctx
static void secp256k1_ecmult_context_clear(secp256k1_ecmult_context *ctx)
static void secp256k1_ecmult_context_init(secp256k1_ecmult_context *ctx)
static const size_t SECP256K1_ECMULT_CONTEXT_PREALLOCATED_SIZE
Definition ecmult.h:20
static int secp256k1_ecmult_context_is_built(const secp256k1_ecmult_context *ctx)
static void secp256k1_ecmult_context_finalize_memcpy(secp256k1_ecmult_context *dst, const secp256k1_ecmult_context *src)
static void secp256k1_ecmult(const secp256k1_ecmult_context *ctx, secp256k1_gej *r, const secp256k1_gej *a, const secp256k1_scalar *na, const secp256k1_scalar *ng)
Double multiply: R = na*A + ng*G.
static void secp256k1_ecmult_context_build(secp256k1_ecmult_context *ctx, void **prealloc)
static int secp256k1_ecmult_multi_var(const secp256k1_callback *error_callback, const secp256k1_ecmult_context *ctx, secp256k1_scratch *scratch, secp256k1_gej *r, const secp256k1_scalar *inp_g_sc, secp256k1_ecmult_multi_callback cb, void *cbdata, size_t n)
Multi-multiply: R = inp_g_sc * G + sum_i ni * Ai.
int() secp256k1_ecmult_multi_callback(secp256k1_scalar *sc, secp256k1_ge *pt, size_t idx, void *data)
Definition ecmult.h:30
T GetRand(T nMax=std::numeric_limits< T >::max()) noexcept
Generate a uniform random integer of type T in the range [0..nMax) nMax defaults to std::numeric_limi...
Definition random.h:85
A group element of the secp256k1 curve, in affine coordinates.
Definition group.h:13
A group element of the secp256k1 curve, in jacobian coordinates.
Definition group.h:23
A scalar modulo the group order of the secp256k1 curve.
Definition scalar_4x64.h:13