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Store z-ratios in the 'x' coord they'll recover
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1 /**********************************************************************
2  * Copyright (c) 2015 Pieter Wuille, Andrew Poelstra                  *
3  * Distributed under the MIT software license, see the accompanying   *
4  * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
5  **********************************************************************/
6
7 #include <string.h>
8
9 #include "include/secp256k1.h"
10 #include "include/secp256k1_ecdh.h"
11 #include "util.h"
12 #include "bench.h"
13
14 typedef struct {
15     secp256k1_context *ctx;
16     secp256k1_pubkey point;
17     unsigned char scalar[32];
18 } bench_ecdh_data;
19
20 static void bench_ecdh_setup(void* arg) {
21     int i;
22     bench_ecdh_data *data = (bench_ecdh_data*)arg;
23     const unsigned char point[] = {
24         0x03,
25         0x54, 0x94, 0xc1, 0x5d, 0x32, 0x09, 0x97, 0x06,
26         0xc2, 0x39, 0x5f, 0x94, 0x34, 0x87, 0x45, 0xfd,
27         0x75, 0x7c, 0xe3, 0x0e, 0x4e, 0x8c, 0x90, 0xfb,
28         0xa2, 0xba, 0xd1, 0x84, 0xf8, 0x83, 0xc6, 0x9f
29     };
30
31     /* create a context with no capabilities */
32     data->ctx = secp256k1_context_create(SECP256K1_FLAGS_TYPE_CONTEXT);
33     for (i = 0; i < 32; i++) {
34         data->scalar[i] = i + 1;
35     }
36     CHECK(secp256k1_ec_pubkey_parse(data->ctx, &data->point, point, sizeof(point)) == 1);
37 }
38
39 static void bench_ecdh(void* arg) {
40     int i;
41     unsigned char res[32];
42     bench_ecdh_data *data = (bench_ecdh_data*)arg;
43
44     for (i = 0; i < 20000; i++) {
45         CHECK(secp256k1_ecdh(data->ctx, res, &data->point, data->scalar, NULL, NULL) == 1);
46     }
47 }
48
49 int main(void) {
50     bench_ecdh_data data;
51
52     run_benchmark("ecdh", bench_ecdh, bench_ecdh_setup, NULL, &data, 10, 20000);
53     return 0;
54 }
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