197 lines
6.7 KiB
C
197 lines
6.7 KiB
C
/**********************************************************************
|
|
* Copyright (c) 2017 Pieter Wuille *
|
|
* Distributed under the MIT software license, see the accompanying *
|
|
* file COPYING or http://www.opensource.org/licenses/mit-license.php.*
|
|
**********************************************************************/
|
|
#include <stdio.h>
|
|
|
|
#include "include/secp256k1.h"
|
|
|
|
#include "util.h"
|
|
#include "hash_impl.h"
|
|
#include "num_impl.h"
|
|
#include "field_impl.h"
|
|
#include "group_impl.h"
|
|
#include "scalar_impl.h"
|
|
#include "ecmult_impl.h"
|
|
#include "bench.h"
|
|
#include "secp256k1.c"
|
|
|
|
#define POINTS 32768
|
|
#define ITERS 10000
|
|
|
|
typedef struct {
|
|
/* Setup once in advance */
|
|
secp256k1_context* ctx;
|
|
secp256k1_scratch_space* scratch;
|
|
secp256k1_scalar* scalars;
|
|
secp256k1_ge* pubkeys;
|
|
secp256k1_scalar* seckeys;
|
|
secp256k1_gej* expected_output;
|
|
secp256k1_ecmult_multi_func ecmult_multi;
|
|
|
|
/* Changes per test */
|
|
size_t count;
|
|
int includes_g;
|
|
|
|
/* Changes per test iteration */
|
|
size_t offset1;
|
|
size_t offset2;
|
|
|
|
/* Test output. */
|
|
secp256k1_gej* output;
|
|
} bench_data;
|
|
|
|
static int bench_callback(secp256k1_scalar* sc, secp256k1_ge* ge, size_t idx, void* arg) {
|
|
bench_data* data = (bench_data*)arg;
|
|
if (data->includes_g) ++idx;
|
|
if (idx == 0) {
|
|
*sc = data->scalars[data->offset1];
|
|
*ge = secp256k1_ge_const_g;
|
|
} else {
|
|
*sc = data->scalars[(data->offset1 + idx) % POINTS];
|
|
*ge = data->pubkeys[(data->offset2 + idx - 1) % POINTS];
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static void bench_ecmult(void* arg) {
|
|
bench_data* data = (bench_data*)arg;
|
|
|
|
size_t count = data->count;
|
|
int includes_g = data->includes_g;
|
|
size_t iters = 1 + ITERS / count;
|
|
size_t iter;
|
|
|
|
for (iter = 0; iter < iters; ++iter) {
|
|
data->ecmult_multi(&data->ctx->ecmult_ctx, data->scratch, &data->output[iter], data->includes_g ? &data->scalars[data->offset1] : NULL, bench_callback, arg, count - includes_g);
|
|
data->offset1 = (data->offset1 + count) % POINTS;
|
|
data->offset2 = (data->offset2 + count - 1) % POINTS;
|
|
}
|
|
}
|
|
|
|
static void bench_ecmult_setup(void* arg) {
|
|
bench_data* data = (bench_data*)arg;
|
|
data->offset1 = (data->count * 0x537b7f6f + 0x8f66a481) % POINTS;
|
|
data->offset2 = (data->count * 0x7f6f537b + 0x6a1a8f49) % POINTS;
|
|
}
|
|
|
|
static void bench_ecmult_teardown(void* arg) {
|
|
bench_data* data = (bench_data*)arg;
|
|
size_t iters = 1 + ITERS / data->count;
|
|
size_t iter;
|
|
/* Verify the results in teardown, to avoid doing comparisons while benchmarking. */
|
|
for (iter = 0; iter < iters; ++iter) {
|
|
secp256k1_gej tmp;
|
|
secp256k1_gej_add_var(&tmp, &data->output[iter], &data->expected_output[iter], NULL);
|
|
CHECK(secp256k1_gej_is_infinity(&tmp));
|
|
}
|
|
}
|
|
|
|
static void generate_scalar(uint32_t num, secp256k1_scalar* scalar) {
|
|
secp256k1_sha256 sha256;
|
|
unsigned char c[11] = {'e', 'c', 'm', 'u', 'l', 't', 0, 0, 0, 0};
|
|
unsigned char buf[32];
|
|
int overflow = 0;
|
|
c[6] = num;
|
|
c[7] = num >> 8;
|
|
c[8] = num >> 16;
|
|
c[9] = num >> 24;
|
|
secp256k1_sha256_initialize(&sha256);
|
|
secp256k1_sha256_write(&sha256, c, sizeof(c));
|
|
secp256k1_sha256_finalize(&sha256, buf);
|
|
secp256k1_scalar_set_b32(scalar, buf, &overflow);
|
|
CHECK(!overflow);
|
|
}
|
|
|
|
static void run_test(bench_data* data, size_t count, int includes_g) {
|
|
char str[32];
|
|
static const secp256k1_scalar zero = SECP256K1_SCALAR_CONST(0, 0, 0, 0, 0, 0, 0, 0);
|
|
size_t iters = 1 + ITERS / count;
|
|
size_t iter;
|
|
|
|
data->count = count;
|
|
data->includes_g = includes_g;
|
|
|
|
/* Compute (the negation of) the expected results directly. */
|
|
data->offset1 = (data->count * 0x537b7f6f + 0x8f66a481) % POINTS;
|
|
data->offset2 = (data->count * 0x7f6f537b + 0x6a1a8f49) % POINTS;
|
|
for (iter = 0; iter < iters; ++iter) {
|
|
secp256k1_scalar tmp;
|
|
secp256k1_scalar total = data->scalars[(data->offset1++) % POINTS];
|
|
size_t i = 0;
|
|
for (i = 0; i + 1 < count; ++i) {
|
|
secp256k1_scalar_mul(&tmp, &data->seckeys[(data->offset2++) % POINTS], &data->scalars[(data->offset1++) % POINTS]);
|
|
secp256k1_scalar_add(&total, &total, &tmp);
|
|
}
|
|
secp256k1_scalar_negate(&total, &total);
|
|
secp256k1_ecmult(&data->ctx->ecmult_ctx, &data->expected_output[iter], NULL, &zero, &total);
|
|
}
|
|
|
|
/* Run the benchmark. */
|
|
sprintf(str, includes_g ? "ecmult_%ig" : "ecmult_%i", (int)count);
|
|
run_benchmark(str, bench_ecmult, bench_ecmult_setup, bench_ecmult_teardown, data, 10, count * (1 + ITERS / count));
|
|
}
|
|
|
|
int main(int argc, char **argv) {
|
|
bench_data data;
|
|
int i, p;
|
|
secp256k1_gej* pubkeys_gej;
|
|
size_t scratch_size;
|
|
|
|
if (argc > 1) {
|
|
if(have_flag(argc, argv, "pippenger_wnaf")) {
|
|
printf("Using pippenger_wnaf:\n");
|
|
data.ecmult_multi = secp256k1_ecmult_pippenger_batch_single;
|
|
} else if(have_flag(argc, argv, "strauss_wnaf")) {
|
|
printf("Using strauss_wnaf:\n");
|
|
data.ecmult_multi = secp256k1_ecmult_strauss_batch_single;
|
|
}
|
|
} else {
|
|
data.ecmult_multi = secp256k1_ecmult_multi_var;
|
|
}
|
|
|
|
/* Allocate stuff */
|
|
data.ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
|
|
scratch_size = secp256k1_strauss_scratch_size(POINTS) + STRAUSS_SCRATCH_OBJECTS*16;
|
|
data.scratch = secp256k1_scratch_space_create(data.ctx, scratch_size);
|
|
data.scalars = malloc(sizeof(secp256k1_scalar) * POINTS);
|
|
data.seckeys = malloc(sizeof(secp256k1_scalar) * POINTS);
|
|
data.pubkeys = malloc(sizeof(secp256k1_ge) * POINTS);
|
|
data.expected_output = malloc(sizeof(secp256k1_gej) * (ITERS + 1));
|
|
data.output = malloc(sizeof(secp256k1_gej) * (ITERS + 1));
|
|
|
|
/* Generate a set of scalars, and private/public keypairs. */
|
|
pubkeys_gej = malloc(sizeof(secp256k1_gej) * POINTS);
|
|
secp256k1_gej_set_ge(&pubkeys_gej[0], &secp256k1_ge_const_g);
|
|
secp256k1_scalar_set_int(&data.seckeys[0], 1);
|
|
for (i = 0; i < POINTS; ++i) {
|
|
generate_scalar(i, &data.scalars[i]);
|
|
if (i) {
|
|
secp256k1_gej_double_var(&pubkeys_gej[i], &pubkeys_gej[i - 1], NULL);
|
|
secp256k1_scalar_add(&data.seckeys[i], &data.seckeys[i - 1], &data.seckeys[i - 1]);
|
|
}
|
|
}
|
|
secp256k1_ge_set_all_gej_var(data.pubkeys, pubkeys_gej, POINTS, &data.ctx->error_callback);
|
|
free(pubkeys_gej);
|
|
|
|
for (i = 1; i <= 8; ++i) {
|
|
run_test(&data, i, 1);
|
|
}
|
|
|
|
for (p = 0; p <= 11; ++p) {
|
|
for (i = 9; i <= 16; ++i) {
|
|
run_test(&data, i << p, 1);
|
|
}
|
|
}
|
|
secp256k1_context_destroy(data.ctx);
|
|
secp256k1_scratch_space_destroy(data.scratch);
|
|
free(data.scalars);
|
|
free(data.pubkeys);
|
|
free(data.seckeys);
|
|
free(data.output);
|
|
free(data.expected_output);
|
|
|
|
return(0);
|
|
}
|