Bitcoin Core  24.99.0
P2P Digital Currency
ecmult_gen.h
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1 /***********************************************************************
2  * Copyright (c) 2013, 2014 Pieter Wuille *
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_GEN_H
8 #define SECP256K1_ECMULT_GEN_H
9 
10 #include "scalar.h"
11 #include "group.h"
12 
13 #ifndef ECMULT_GEN_PREC_BITS
14 # define ECMULT_GEN_PREC_BITS 4
15 # ifdef DEBUG_CONFIG
16 # pragma message DEBUG_CONFIG_MSG("ECMULT_GEN_PREC_BITS undefined, assuming default value")
17 # endif
18 #endif
19 
20 #ifdef DEBUG_CONFIG
21 # pragma message DEBUG_CONFIG_DEF(ECMULT_GEN_PREC_BITS)
22 #endif
23 
24 #if ECMULT_GEN_PREC_BITS != 2 && ECMULT_GEN_PREC_BITS != 4 && ECMULT_GEN_PREC_BITS != 8
25 # error "Set ECMULT_GEN_PREC_BITS to 2, 4 or 8."
26 #endif
27 
28 #define ECMULT_GEN_PREC_G(bits) (1 << bits)
29 #define ECMULT_GEN_PREC_N(bits) (256 / bits)
30 
31 typedef struct {
32  /* Whether the context has been built. */
33  int built;
34 
35  /* Blinding values used when computing (n-b)G + bG. */
39 
42 
45 
46 static void secp256k1_ecmult_gen_blind(secp256k1_ecmult_gen_context *ctx, const unsigned char *seed32);
47 
48 #endif /* SECP256K1_ECMULT_GEN_H */
static void secp256k1_ecmult_gen_context_clear(secp256k1_ecmult_gen_context *ctx)
static void secp256k1_ecmult_gen_context_build(secp256k1_ecmult_gen_context *ctx)
static void secp256k1_ecmult_gen(const secp256k1_ecmult_gen_context *ctx, secp256k1_gej *r, const secp256k1_scalar *a)
Multiply with the generator: R = a*G.
static void secp256k1_ecmult_gen_blind(secp256k1_ecmult_gen_context *ctx, const unsigned char *seed32)
secp256k1_scalar blind
Definition: ecmult_gen.h:36
A group element of the secp256k1 curve, in jacobian coordinates.
Definition: group.h:28
A scalar modulo the group order of the secp256k1 curve.
Definition: scalar_4x64.h:13
static secp256k1_context * ctx
Definition: tests.c:35