Bitcoin ABC  0.24.7
P2P Digital Currency
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 
14 typedef 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 
22 static void secp256k1_ecmult_context_build(secp256k1_ecmult_context *ctx, void **prealloc);
26 
28 static void secp256k1_ecmult(const secp256k1_ecmult_context *ctx, secp256k1_gej *r, const secp256k1_gej *a, const secp256k1_scalar *na, const secp256k1_scalar *ng);
29 
30 typedef int (secp256k1_ecmult_multi_callback)(secp256k1_scalar *sc, secp256k1_ge *pt, size_t idx, void *data);
31 
43 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);
44 
45 #endif /* SECP256K1_ECMULT_H */
secp256k1_ecmult_context_is_built
static int secp256k1_ecmult_context_is_built(const secp256k1_ecmult_context *ctx)
secp256k1_ecmult_context_build
static void secp256k1_ecmult_context_build(secp256k1_ecmult_context *ctx, void **prealloc)
secp256k1_ecmult_context_clear
static void secp256k1_ecmult_context_clear(secp256k1_ecmult_context *ctx)
scratch.h
group.h
secp256k1_scratch_space_struct
Definition: scratch.h:12
secp256k1_scalar
A scalar modulo the group order of the secp256k1 curve.
Definition: scalar_4x64.h:13
secp256k1_ecmult
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.
secp256k1_gej
A group element of the secp256k1 curve, in jacobian coordinates.
Definition: group.h:23
secp256k1_ecmult_context_init
static void secp256k1_ecmult_context_init(secp256k1_ecmult_context *ctx)
secp256k1_ge_storage
Definition: group.h:33
secp256k1_ecmult_context_finalize_memcpy
static void secp256k1_ecmult_context_finalize_memcpy(secp256k1_ecmult_context *dst, const secp256k1_ecmult_context *src)
ctx
secp256k1_context * ctx
Definition: bench_multiset.c:12
scalar.h
secp256k1_ecmult_multi_var
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.
secp256k1_callback
Definition: util.h:19
SECP256K1_ECMULT_CONTEXT_PREALLOCATED_SIZE
static const size_t SECP256K1_ECMULT_CONTEXT_PREALLOCATED_SIZE
Definition: ecmult.h:20
secp256k1_ecmult_multi_callback
int() secp256k1_ecmult_multi_callback(secp256k1_scalar *sc, secp256k1_ge *pt, size_t idx, void *data)
Definition: ecmult.h:30
secp256k1_ecmult_context
Definition: ecmult.h:14
secp256k1_ge
A group element of the secp256k1 curve, in affine coordinates.
Definition: group.h:13