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/**
* @file util/bench_age_restriction.c
* @brief Measure Commit, Attest, Verify, Derive and Compare
* @author Özgür Kesim
*
* compile in exchange/src/util with
*
* gcc benc_age_restriction.c \
* -lgnunetutil -lgnunetjson -lsodium -ljansson \
* -L/usr/lib/x86_64-linux-gnu -lmicrohttpd -ltalerutil \
* -I../include \
* -o bench_age_restriction
*
*/
#include "platform.h"
#include <math.h>
#include <gnunet/gnunet_util_lib.h>
#include <taler/taler_util.h>
#include <taler/taler_crypto_lib.h>
static struct TALER_AgeMask
age_mask = { .bits = 1
| 1 << 8 | 1 << 10 | 1 << 12
| 1 << 14 | 1 << 16 | 1 << 18 | 1 << 21 };
extern uint8_t
get_age_group (
const struct TALER_AgeMask *mask,
uint8_t age);
/**
* Encodes the age mask into a string, like "8:10:12:14:16:18:21"
*/
char *
age_mask_to_string (
const struct TALER_AgeMask *m)
{
uint32_t bits = m->bits;
unsigned int n = 0;
char *buf = GNUNET_malloc (32 * 3); // max characters possible
char *pos = buf;
if (NULL == buf)
{
return buf;
}
while (bits != 0)
{
bits >>= 1;
n++;
if (0 == (bits & 1))
{
continue;
}
if (n > 9)
{
*(pos++) = '0' + n / 10;
}
*(pos++) = '0' + n % 10;
if (0 != (bits >> 1))
{
*(pos++) = ':';
}
}
return buf;
}
#define ITER 2000
double
average (long *times, size_t size)
{
double mean = 0.0;
for (int i = 0; i < size; i++)
{
mean += times[i];
}
return mean / size;
}
double
stdev (long *times, size_t size)
{
double mean = average (times, size);
double V = 0.0;
for (int i = 0; i < size; i++)
{
double d = times[i] - mean;
d *= d;
V += d;
}
return sqrt (V / size);
}
#define pr(n,t, i) printf ("%10s (%dx):\t%.2f ± %.2fµs\n", (n), i, average ( \
&t[0], ITER) / 1000, stdev (&t[0], ITER) / 1000); \
i = 0;
#define starttime clock_gettime (CLOCK_MONOTONIC, &tstart)
#define stoptime clock_gettime (CLOCK_MONOTONIC, &tend); \
times[i] = ((long) tend.tv_sec * 1000 * 1000 * 1000 + tend.tv_nsec) \
- ((long) tstart.tv_sec * 1000 * 1000 * 1000 + tstart.tv_nsec);
int
main (int argc,
const char *const argv[])
{
struct timespec tstart = {0,0}, tend = {0,0};
enum GNUNET_GenericReturnValue ret;
struct TALER_AgeCommitmentProof acp = {0};
uint8_t age = 21;
uint8_t age_group = get_age_group (&age_mask, age);
struct GNUNET_HashCode seed;
long times[ITER] = {0};
int i = 0;
// commit
for (; i < ITER; i++)
{
starttime;
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
&seed,
sizeof(seed));
ret = TALER_age_restriction_commit (&age_mask,
age,
&seed,
&acp);
stoptime;
}
pr ("commit", times, i);
// attest
for (; i < ITER; i++)
{
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
&seed,
sizeof(seed));
ret = TALER_age_restriction_commit (&age_mask,
age,
&seed,
&acp);
starttime;
uint8_t min_group = get_age_group (&age_mask, 13);
struct TALER_AgeAttestation at = {0};
ret = TALER_age_commitment_attest (&acp,
13,
&at);
stoptime;
}
pr ("attest", times, i);
// verify
for (; i < ITER; i++)
{
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
&seed,
sizeof(seed));
ret = TALER_age_restriction_commit (&age_mask,
age,
&seed,
&acp);
uint8_t min_group = get_age_group (&age_mask, 13);
struct TALER_AgeAttestation at = {0};
ret = TALER_age_commitment_attest (&acp,
13,
&at);
starttime;
ret = TALER_age_commitment_verify (&acp.commitment,
13,
&at);
stoptime;
}
pr ("verify", times, i);
// derive
for (; i < ITER; i++)
{
struct TALER_AgeCommitmentProof acp2 = {0};
GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_WEAK,
&seed,
sizeof(seed));
starttime;
TALER_age_commitment_derive (&acp,
&seed,
&acp2);
stoptime;
}
pr ("derive", times, i);
return 0;
}
/* end of tv_age_restriction.c */
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