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Signed-digit multi-comb ecmult_gen algorithm

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This introduces the signed-digit multi-comb multiplication algorithm
for constant-time G multiplications (ecmult_gen). It is based on
section 3.3 of "Fast and compact elliptic-curve cryptography" by
Mike Hamburg (see https://eprint.iacr.org/2012/309).

Original implementation by Peter Dettman, with changes by Pieter Wuille
to use scalars for recoding, and additional comments.
This commit is contained in:
Peter Dettman
2021-12-26 18:09:27 -05:00
committed by Pieter Wuille
parent 486518b350
commit fde1dfcd8d
8 changed files with 762 additions and 9876 deletions
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4
src/ecmult_gen_compute_table.h
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@@ -1,5 +1,5 @@
/***********************************************************************
* Copyright (c) 2013, 2014, 2015 Pieter Wuille, Gregory Maxwell *
* Copyright (c) Pieter Wuille, Gregory Maxwell *
* Distributed under the MIT software license, see the accompanying *
* file COPYING or https://www.opensource.org/licenses/mit-license.php.*
***********************************************************************/
@@ -9,6 +9,6 @@
#include "ecmult_gen.h"
static void secp256k1_ecmult_gen_compute_table(secp256k1_ge_storage* table, const secp256k1_ge* gen, int bits);
static void secp256k1_ecmult_gen_compute_table(secp256k1_ge_storage* table, const secp256k1_ge* gen, int blocks, int teeth);
#endif /* SECP256K1_ECMULT_GEN_COMPUTE_TABLE_H */