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5606cbc710
Updates the libsecp256k1 dependency to commit: c0d9480fbbf8eccbd4be23ed27f6f2af6f3b211e PR: ``` BenchmarkSign-24 57756 21214 ns/op 164 B/op 3 allocs/op BenchmarkRecover-24 37156 33044 ns/op 80 B/op 1 allocs/op BenchmarkEcrecoverSignature-24 36889 32935 ns/op 80 B/op 1 allocs/op BenchmarkVerifySignature-24 41163 29207 ns/op 0 B/op 0 allocs/op BenchmarkDecompressPubkey-24 318624 4062 ns/op 304 B/op 6 allocs/op ``` Master: ``` BenchmarkSign-24 34509 35330 ns/op 164 B/op 3 allocs/op BenchmarkRecover-24 25418 47725 ns/op 80 B/op 1 allocs/op BenchmarkEcrecoverSignature-24 25735 47591 ns/op 80 B/op 1 allocs/op BenchmarkVerifySignature-24 29108 41097 ns/op 0 B/op 0 allocs/op BenchmarkDecompressPubkey-24 294747 4143 ns/op 304 B/op 6 allocs/op ``` Performance seems to be improved significantly: ``` Sign-24 34.86µ ± 3% 21.66µ ± 2% -37.86% (p=0.000 n=10) Recover-24 46.14µ ± 3% 33.24µ ± 2% -27.95% (p=0.000 n=10) ```
38 lines
1.3 KiB
C
38 lines
1.3 KiB
C
/***********************************************************************
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* Copyright (c) 2015 Andrew Poelstra *
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* Distributed under the MIT software license, see the accompanying *
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* file COPYING or https://www.opensource.org/licenses/mit-license.php.*
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***********************************************************************/
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#ifndef SECP256K1_ECMULT_CONST_H
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#define SECP256K1_ECMULT_CONST_H
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#include "scalar.h"
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#include "group.h"
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/**
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* Multiply: R = q*A (in constant-time for q)
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*/
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static void secp256k1_ecmult_const(secp256k1_gej *r, const secp256k1_ge *a, const secp256k1_scalar *q);
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/**
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* Same as secp256k1_ecmult_const, but takes in an x coordinate of the base point
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* only, specified as fraction n/d (numerator/denominator). Only the x coordinate of the result is
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* returned.
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*
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* If known_on_curve is 0, a verification is performed that n/d is a valid X
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* coordinate, and 0 is returned if not. Otherwise, 1 is returned.
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*
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* d being NULL is interpreted as d=1. If non-NULL, d must not be zero. q must not be zero.
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*
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* Constant time in the value of q, but not any other inputs.
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*/
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static int secp256k1_ecmult_const_xonly(
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secp256k1_fe *r,
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const secp256k1_fe *n,
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const secp256k1_fe *d,
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const secp256k1_scalar *q,
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int known_on_curve
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);
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#endif /* SECP256K1_ECMULT_CONST_H */
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