bench_age_restriction.c (4944B)
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 <math.h> 16 #include <gnunet/gnunet_util_lib.h> 17 #include <taler/taler_util.h> 18 #include <taler/taler_crypto_lib.h> 19 20 static struct TALER_AgeMask 21 age_mask = { .bits = 1 22 | 1 << 8 | 1 << 10 | 1 << 12 23 | 1 << 14 | 1 << 16 | 1 << 18 | 1 << 21 }; 24 25 extern uint8_t 26 get_age_group ( 27 const struct TALER_AgeMask *mask, 28 uint8_t age); 29 30 /** 31 * Encodes the age mask into a string, like "8:10:12:14:16:18:21" 32 */ 33 char * 34 age_mask_to_string ( 35 const struct TALER_AgeMask *m) 36 { 37 uint32_t bits = m->bits; 38 unsigned int n = 0; 39 char *buf = GNUNET_malloc (32 * 3); // max characters possible 40 char *pos = buf; 41 42 if (NULL == buf) 43 { 44 return buf; 45 } 46 47 while (bits != 0) 48 { 49 bits >>= 1; 50 n++; 51 if (0 == (bits & 1)) 52 { 53 continue; 54 } 55 56 if (n > 9) 57 { 58 *(pos++) = '0' + n / 10; 59 } 60 *(pos++) = '0' + n % 10; 61 62 if (0 != (bits >> 1)) 63 { 64 *(pos++) = ':'; 65 } 66 } 67 return buf; 68 } 69 70 71 #define ITER 2000 72 73 double 74 average (long *times, size_t size) 75 { 76 double mean = 0.0; 77 for (int i = 0; i < size; i++) 78 { 79 mean += times[i]; 80 } 81 return mean / size; 82 } 83 84 85 double 86 stdev (long *times, size_t size) 87 { 88 double mean = average (times, size); 89 double V = 0.0; 90 for (int i = 0; i < size; i++) 91 { 92 double d = times[i] - mean; 93 d *= d; 94 V += d; 95 } 96 return sqrt (V / size); 97 } 98 99 100 #define pr(n,t, i) printf ("%10s (%dx):\t%.2f ± %.2fµs\n", (n), i, average ( \ 101 &t[0], ITER) / 1000, stdev (&t[0], ITER) / 1000); \ 102 i = 0; 103 104 #define starttime clock_gettime (CLOCK_MONOTONIC, &tstart) 105 #define stoptime clock_gettime (CLOCK_MONOTONIC, &tend); \ 106 times[i] = ((long) tend.tv_sec * 1000 * 1000 * 1000 + tend.tv_nsec) \ 107 - ((long) tstart.tv_sec * 1000 * 1000 * 1000 + tstart.tv_nsec \ 108 ); 109 110 111 int 112 main (int argc, 113 const char *const argv[]) 114 { 115 struct timespec tstart = {0,0}, tend = {0,0}; 116 enum GNUNET_GenericReturnValue ret; 117 struct TALER_AgeCommitmentProof acp = {0}; 118 uint8_t age = 21; 119 uint8_t age_group = get_age_group (&age_mask, age); 120 struct GNUNET_HashCode seed; 121 long times[ITER] = {0}; 122 int i = 0; 123 124 // commit 125 for (; i < ITER; i++) 126 { 127 starttime; 128 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, 129 &seed, 130 sizeof(seed)); 131 132 ret = TALER_age_restriction_commit (&age_mask, 133 age, 134 &seed, 135 &acp); 136 stoptime; 137 138 } 139 pr ("commit", times, i); 140 141 // attest 142 for (; i < ITER; i++) 143 { 144 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, 145 &seed, 146 sizeof(seed)); 147 148 ret = TALER_age_restriction_commit (&age_mask, 149 age, 150 &seed, 151 &acp); 152 153 starttime; 154 uint8_t min_group = get_age_group (&age_mask, 13); 155 struct TALER_AgeAttestationP at = {0}; 156 ret = TALER_age_commitment_attest (&acp, 157 13, 158 &at); 159 stoptime; 160 } 161 pr ("attest", times, i); 162 163 // verify 164 for (; i < ITER; i++) 165 { 166 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, 167 &seed, 168 sizeof(seed)); 169 170 ret = TALER_age_restriction_commit (&age_mask, 171 age, 172 &seed, 173 &acp); 174 175 uint8_t min_group = get_age_group (&age_mask, 13); 176 struct TALER_AgeAttestationP at = {0}; 177 178 ret = TALER_age_commitment_attest (&acp, 179 13, 180 &at); 181 starttime; 182 ret = TALER_age_commitment_verify (&acp.commitment, 183 13, 184 &at); 185 stoptime; 186 } 187 pr ("verify", times, i); 188 189 // derive 190 for (; i < ITER; i++) 191 { 192 struct TALER_AgeCommitmentProof acp2 = {0}; 193 GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK, 194 &seed, 195 sizeof(seed)); 196 starttime; 197 TALER_age_commitment_derive (&acp, 198 &seed, 199 &acp2); 200 stoptime; 201 } 202 pr ("derive", times, i); 203 204 return 0; 205 } 206 207 208 /* end of tv_age_restriction.c */