1  /***********************************************************************
 2   * Copyright (c) 2014-2015 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_MODULE_RECOVERY_BENCH_H
 8  #define SECP256K1_MODULE_RECOVERY_BENCH_H
 9  
10  #include "../../../include/secp256k1_recovery.h"
11  
12  typedef struct {
13      secp256k1_context *ctx;
14      unsigned char msg[32];
15      unsigned char sig[64];
16  } bench_recover_data;
17  
18  static void bench_recover(void* arg, int iters) {
19      int i;
20      bench_recover_data *data = (bench_recover_data*)arg;
21      secp256k1_pubkey pubkey;
22      unsigned char pubkeyc[33];
23  
24      for (i = 0; i < iters; i++) {
25          int j;
26          size_t pubkeylen = 33;
27          secp256k1_ecdsa_recoverable_signature sig;
28          CHECK(secp256k1_ecdsa_recoverable_signature_parse_compact(data->ctx, &sig, data->sig, i % 2));
29          CHECK(secp256k1_ecdsa_recover(data->ctx, &pubkey, &sig, data->msg));
30          CHECK(secp256k1_ec_pubkey_serialize(data->ctx, pubkeyc, &pubkeylen, &pubkey, SECP256K1_EC_COMPRESSED));
31          for (j = 0; j < 32; j++) {
32              data->sig[j + 32] = data->msg[j];    /* Move former message to S. */
33              data->msg[j] = data->sig[j];         /* Move former R to message. */
34              data->sig[j] = pubkeyc[j + 1];       /* Move recovered pubkey X coordinate to R (which must be a valid X coordinate). */
35          }
36      }
37  }
38  
39  static void bench_recover_setup(void* arg) {
40      int i;
41      bench_recover_data *data = (bench_recover_data*)arg;
42  
43      for (i = 0; i < 32; i++) {
44          data->msg[i] = 1 + i;
45      }
46      for (i = 0; i < 64; i++) {
47          data->sig[i] = 65 + i;
48      }
49  }
50  
51  static void run_recovery_bench(int iters, int argc, char** argv) {
52      bench_recover_data data;
53      int d = argc == 1;
54  
55      data.ctx = secp256k1_context_create(SECP256K1_CONTEXT_NONE);
56  
57      if (d || have_flag(argc, argv, "ecdsa") || have_flag(argc, argv, "recover") || have_flag(argc, argv, "ecdsa_recover")) run_benchmark("ecdsa_recover", bench_recover, bench_recover_setup, NULL, &data, 10, iters);
58  
59      secp256k1_context_destroy(data.ctx);
60  }
61  
62  #endif /* SECP256K1_MODULE_RECOVERY_BENCH_H */