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22 * @file util/perf_crypto_ecc_dlog.c
23 * @brief benchmark for ECC DLOG calculation
24 * @author Christian Grothoff
27 #include "gnunet_util_lib.h"
33 * Name of the curve we are using. Note that we have hard-coded
34 * structs that use 256 bits, so using a bigger curve will require
35 * changes that break stuff badly. The name of the curve given here
36 * must be agreed by all peers and be supported by libgcrypt.
38 #define CURVE "Ed25519"
41 * Maximum value we benchmark dlog for.
43 #define MAX_FACT (1024 * 1024)
46 * Maximum memory to use, sqrt(MAX_FACT) is a good choice.
51 * How many values do we test?
56 * Range of values to use for MATH tests.
58 #define MATH_MAX 500000
62 * Do some DLOG operations for testing.
64 * @param edc context for ECC operations
65 * @param do_dlog #GNUNET_YES if we want to actually do the bencharked operation
68 test_dlog(struct GNUNET_CRYPTO_EccDlogContext *edc,
80 GNUNET_assert(0 == gcry_mpi_ec_new(&ctx, NULL, CURVE));
81 g = gcry_mpi_ec_get_point("g", ctx, 0);
82 GNUNET_assert(NULL != g);
83 n = gcry_mpi_ec_get_mpi("n", ctx, 0);
84 q = gcry_mpi_point_new(0);
85 fact = gcry_mpi_new(0);
86 for (i = 0; i < TEST_ITER; i++)
89 x = GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK,
91 if (0 == GNUNET_CRYPTO_random_u32(GNUNET_CRYPTO_QUALITY_WEAK,
94 gcry_mpi_set_ui(fact, x);
95 gcry_mpi_sub(fact, n, fact);
100 gcry_mpi_set_ui(fact, x);
102 gcry_mpi_ec_mul(q, fact, g, ctx);
103 if ((GNUNET_YES == do_dlog) &&
105 (iret = GNUNET_CRYPTO_ecc_dlog(edc,
109 "DLOG failed for value %d (%d)\n",
115 gcry_mpi_release(fact);
117 gcry_mpi_point_release(g);
118 gcry_mpi_point_release(q);
119 gcry_ctx_release(ctx);
120 fprintf(stderr, "\n");
125 main(int argc, char *argv[])
127 struct GNUNET_CRYPTO_EccDlogContext *edc;
128 struct GNUNET_TIME_Absolute start;
129 struct GNUNET_TIME_Relative delta;
131 if (!gcry_check_version("1.6.0"))
135 ("libgcrypt has not the expected version (version %s is required).\n"),
139 if (getenv("GNUNET_GCRYPT_DEBUG"))
140 gcry_control(GCRYCTL_SET_DEBUG_FLAGS, 1u, 0);
141 GNUNET_log_setup("perf-crypto-ecc-dlog",
144 start = GNUNET_TIME_absolute_get();
145 edc = GNUNET_CRYPTO_ecc_dlog_prepare(MAX_FACT,
147 printf("DLOG precomputation 1M/1K took %s\n",
148 GNUNET_STRINGS_relative_time_to_string(GNUNET_TIME_absolute_get_duration(start),
150 GAUGER("UTIL", "ECC DLOG initialization",
151 GNUNET_TIME_absolute_get_duration
152 (start).rel_value_us / 1000LL, "ms/op");
153 start = GNUNET_TIME_absolute_get();
154 /* first do a baseline run without the DLOG */
155 test_dlog(edc, GNUNET_NO);
156 delta = GNUNET_TIME_absolute_get_duration(start);
157 start = GNUNET_TIME_absolute_get();
158 test_dlog(edc, GNUNET_YES);
159 delta = GNUNET_TIME_relative_subtract(GNUNET_TIME_absolute_get_duration(start),
161 printf("%u DLOG calculations took %s\n",
163 GNUNET_STRINGS_relative_time_to_string(delta,
165 GAUGER("UTIL", "ECC DLOG operations",
166 delta.rel_value_us / 1000LL / TEST_ITER,
169 GNUNET_CRYPTO_ecc_dlog_release(edc);
173 /* end of perf_crypto_ecc_dlog.c */