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Generalize Strauss to support multiple points

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API by Andrew Poelstra.
This commit is contained in:
Pieter Wuille
2017-08-16 14:45:27 -07:00
committed by Jonas Nick
parent 548de42ecf
commit 8c1c831bdb
4 changed files with 215 additions and 55 deletions
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9
src/ecmult.h
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@@ -1,5 +1,5 @@
/**********************************************************************
* Copyright (c) 2013, 2014 Pieter Wuille *
* Copyright (c) 2013, 2014, 2017 Pieter Wuille, Andrew Poelstra *
* Distributed under the MIT software license, see the accompanying *
* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
**********************************************************************/
@@ -9,6 +9,8 @@
#include "num.h"
#include "group.h"
#include "scalar.h"
#include "scratch.h"
typedef struct {
/* For accelerating the computation of a*P + b*G: */
@@ -28,4 +30,9 @@ static int secp256k1_ecmult_context_is_built(const secp256k1_ecmult_context *ctx
/** Double multiply: R = na*A + ng*G */
static void secp256k1_ecmult(const secp256k1_ecmult_context *ctx, secp256k1_gej *r, const secp256k1_gej *a, const secp256k1_scalar *na, const secp256k1_scalar *ng);
typedef int (secp256k1_ecmult_multi_callback)(secp256k1_scalar *sc, secp256k1_ge *pt, size_t idx, void *data);
/** Multi-multiply: R = inp_g_sc * G + sum_i ni * Ai. */
static int secp256k1_ecmult_multi(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);
#endif /* SECP256K1_ECMULT_H */