text: /**********************************************************************
   * Copyright (c) 2015 Pieter Wuille, Andrew Poelstra                  *
   * Distributed under the MIT software license, see the accompanying   *
   * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
   **********************************************************************/
  
  #include <string.h>
  
  #include "include/secp256k1.h"
  #include "include/secp256k1_ecdh.h"
  #include "util.h"
  #include "bench.h"
  
  typedef struct {
      secp256k1_context *ctx;
      secp256k1_pubkey point;
      unsigned char scalar[32];
  } bench_ecdh_t;
  
  static void bench_ecdh_setup(void* arg) {
      int i;
      bench_ecdh_t *data = (bench_ecdh_t*)arg;
      const unsigned char point[] = {
          0x03,
          0x54, 0x94, 0xc1, 0x5d, 0x32, 0x09, 0x97, 0x06,
          0xc2, 0x39, 0x5f, 0x94, 0x34, 0x87, 0x45, 0xfd,
          0x75, 0x7c, 0xe3, 0x0e, 0x4e, 0x8c, 0x90, 0xfb,
          0xa2, 0xba, 0xd1, 0x84, 0xf8, 0x83, 0xc6, 0x9f
      };
  
      /* create a context with no capabilities */
      data->ctx = secp256k1_context_create(SECP256K1_FLAGS_TYPE_CONTEXT);
      for (i = 0; i < 32; i++) {
          data->scalar[i] = i + 1;
      }
      CHECK(secp256k1_ec_pubkey_parse(data->ctx, &data->point, point, sizeof(point)) == 1);
  }
  
  static void bench_ecdh(void* arg) {
      int i;
      unsigned char res[32];
      bench_ecdh_t *data = (bench_ecdh_t*)arg;
  
      for (i = 0; i < 20000; i++) {
          CHECK(secp256k1_ecdh(data->ctx, res, &data->point, data->scalar) == 1);
      }
  }
  
  int main(void) {
      bench_ecdh_t data;
  
      run_benchmark("ecdh", bench_ecdh, bench_ecdh_setup, NULL, &data, 10, 20000);
      return 0;
  }
  