bench_age_restriction.c (4972B)
1 /** 2 * @file util/bench_age_restriction.c 3 * @brief Measure Commit, Attest, Verify, Derive and Compare 4 * @author Özgür Kesim 5 * 6 * compile in exchange/src/util with 7 * 8 * gcc benc_age_restriction.c \ 9 * -lgnunetutil -lgnunetjson -lsodium -ljansson \ 10 * -L/usr/lib/x86_64-linux-gnu -lmicrohttpd -ltalerutil \ 11 * -I../include \ 12 * -o bench_age_restriction 13 * 14 */ 15 #include "taler/platform.h" 16 #include <math.h> 17 #include <gnunet/gnunet_util_lib.h> 18 #include <taler/taler_util.h> 19 #include <taler/taler_crypto_lib.h> 20 21 static struct TALER_AgeMask 22 age_mask = { .bits = 1 23 | 1 << 8 | 1 << 10 | 1 << 12 24 | 1 << 14 | 1 << 16 | 1 << 18 | 1 << 21 }; 25 26 extern uint8_t 27 get_age_group ( 28 const struct TALER_AgeMask *mask, 29 uint8_t age); 30 31 /** 32 * Encodes the age mask into a string, like "8:10:12:14:16:18:21" 33 */ 34 char * 35 age_mask_to_string ( 36 const struct TALER_AgeMask *m) 37 { 38 uint32_t bits = m->bits; 39 unsigned int n = 0; 40 char *buf = GNUNET_malloc (32 * 3); // max characters possible 41 char *pos = buf; 42 43 if (NULL == buf) 44 { 45 return buf; 46 } 47 48 while (bits != 0) 49 { 50 bits >>= 1; 51 n++; 52 if (0 == (bits & 1)) 53 { 54 continue; 55 } 56 57 if (n > 9) 58 { 59 *(pos++) = '0' + n / 10; 60 } 61 *(pos++) = '0' + n % 10; 62 63 if (0 != (bits >> 1)) 64 { 65 *(pos++) = ':'; 66 } 67 } 68 return buf; 69 } 70 71 72 #define ITER 2000 73 74 double 75 average (long *times, size_t size) 76 { 77 double mean = 0.0; 78 for (int i = 0; i < size; i++) 79 { 80 mean += times[i]; 81 } 82 return mean / size; 83 } 84 85 86 double 87 stdev (long *times, size_t size) 88 { 89 double mean = average (times, size); 90 double V = 0.0; 91 for (int i = 0; i < size; i++) 92 { 93 double d = times[i] - mean; 94 d *= d; 95 V += d; 96 } 97 return sqrt (V / size); 98 } 99 100 101 #define pr(n,t, i) printf ("%10s (%dx):\t%.2f ± %.2fµs\n", (n), i, average ( \ 102 &t[0], ITER) / 1000, stdev (&t[0], ITER) / 1000); \ 103 i = 0; 104 105 #define starttime clock_gettime (CLOCK_MONOTONIC, &tstart) 106 #define stoptime clock_gettime (CLOCK_MONOTONIC, &tend); \ 107 times[i] = ((long) tend.tv_sec * 1000 * 1000 * 1000 + tend.tv_nsec) \ 108 - ((long) tstart.tv_sec * 1000 * 1000 * 1000 + tstart.tv_nsec \ 109 ); 110 111 112 int 113 main (int argc, 114 const char *const argv[]) 115 { 116 struct timespec tstart = {0,0}, tend = {0,0}; 117 enum GNUNET_GenericReturnValue ret; 118 struct TALER_AgeCommitmentProof acp = {0}; 119 uint8_t age = 21; 120 uint8_t age_group = get_age_group (&age_mask, age); 121 struct GNUNET_HashCode seed; 122 long times[ITER] = {0}; 123 int i = 0; 124 125 // commit 126 for (; i < ITER; i++) 127 { 128 starttime; 129 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, 130 &seed, 131 sizeof(seed)); 132 133 ret = TALER_age_restriction_commit (&age_mask, 134 age, 135 &seed, 136 &acp); 137 stoptime; 138 139 } 140 pr ("commit", times, i); 141 142 // attest 143 for (; i < ITER; i++) 144 { 145 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, 146 &seed, 147 sizeof(seed)); 148 149 ret = TALER_age_restriction_commit (&age_mask, 150 age, 151 &seed, 152 &acp); 153 154 starttime; 155 uint8_t min_group = get_age_group (&age_mask, 13); 156 struct TALER_AgeAttestationP at = {0}; 157 ret = TALER_age_commitment_attest (&acp, 158 13, 159 &at); 160 stoptime; 161 } 162 pr ("attest", times, i); 163 164 // verify 165 for (; i < ITER; i++) 166 { 167 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, 168 &seed, 169 sizeof(seed)); 170 171 ret = TALER_age_restriction_commit (&age_mask, 172 age, 173 &seed, 174 &acp); 175 176 uint8_t min_group = get_age_group (&age_mask, 13); 177 struct TALER_AgeAttestationP at = {0}; 178 179 ret = TALER_age_commitment_attest (&acp, 180 13, 181 &at); 182 starttime; 183 ret = TALER_age_commitment_verify (&acp.commitment, 184 13, 185 &at); 186 stoptime; 187 } 188 pr ("verify", times, i); 189 190 // derive 191 for (; i < ITER; i++) 192 { 193 struct TALER_AgeCommitmentProof acp2 = {0}; 194 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, 195 &seed, 196 sizeof(seed)); 197 starttime; 198 TALER_age_commitment_derive (&acp, 199 &seed, 200 &acp2); 201 stoptime; 202 } 203 pr ("derive", times, i); 204 205 return 0; 206 } 207 208 209 /* end of tv_age_restriction.c */