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31 lines
1.4 KiB
31 lines
1.4 KiB
/**********************************************************************
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* Copyright (c) 2013, 2014 Pieter Wuille *
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* Distributed under the MIT software license, see the accompanying *
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* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
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**********************************************************************/
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#ifndef _SECP256K1_ECMULT_
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#define _SECP256K1_ECMULT_
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#include "num.h"
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#include "group.h"
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typedef struct {
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/* For accelerating the computation of a*P + b*G: */
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secp256k1_ge_storage_t (*pre_g)[]; /* odd multiples of the generator */
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#ifdef USE_ENDOMORPHISM
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secp256k1_ge_storage_t (*pre_g_128)[]; /* odd multiples of 2^128*generator */
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#endif
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} secp256k1_ecmult_context_t;
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static void secp256k1_ecmult_context_init(secp256k1_ecmult_context_t *ctx);
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static void secp256k1_ecmult_context_build(secp256k1_ecmult_context_t *ctx);
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static void secp256k1_ecmult_context_clone(secp256k1_ecmult_context_t *dst,
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const secp256k1_ecmult_context_t *src);
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static void secp256k1_ecmult_context_clear(secp256k1_ecmult_context_t *ctx);
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static int secp256k1_ecmult_context_is_built(const secp256k1_ecmult_context_t *ctx);
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/** Double multiply: R = na*A + ng*G */
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static void secp256k1_ecmult(const secp256k1_ecmult_context_t *ctx, secp256k1_gej_t *r, const secp256k1_gej_t *a, const secp256k1_scalar_t *na, const secp256k1_scalar_t *ng);
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#endif
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