libbrandt/test_crypto.c

#include "brandt.h"
#include "crypto.h"
#include "smc.h"
#include "test.h"

extern gcry_mpi_point_t ec_gen;
extern gcry_ctx_t ec_ctx;

int
test_brandt_ec_keypair_create ()
{
	gcry_mpi_t skey;
	gcry_mpi_point_t pkey1;
	gcry_mpi_point_t pkey2 = gcry_mpi_point_new(0);

	brandt_ec_keypair_create (&pkey1, &skey);
	check(skey, "no sec key created");
	check(pkey1, "no pub key created");
	check(pkey2, "could not init pkey2");

	gcry_mpi_ec_mul(pkey2, skey, ec_gen, ec_ctx);
	check(!brandt_ec_point_cmp(pkey1, pkey2), "pkeys do not match");

	gcry_mpi_release(skey);
	gcry_mpi_point_release(pkey1);
	gcry_mpi_point_release(pkey2);
}

int
test_smc_zkp_dl ()
{
	static int first = 1;
	gcry_mpi_t c;
	gcry_mpi_t r;
	gcry_mpi_t s;
	gcry_mpi_t x;
	gcry_mpi_point_t a;
	gcry_mpi_point_t g;
	gcry_mpi_point_t v = gcry_mpi_point_new(0);

	check(v, "no pub key initialized");
	brandt_ec_keypair_create (&g, &s);
	check(g, "no gen created");

	if (first)
	{
		gcry_mpi_ec_mul(g, GCRYMPI_CONST_ONE, ec_gen, ec_ctx);
		first = 0;
	}

	brandt_ec_skey_create(&x);
	check(x, "no sec key created");
	gcry_mpi_ec_mul(v, x, g, ec_ctx);
	check(v, "no pub key created");

	smc_zkp_dl(v, g, x, &a, &c, &r);
	check(!smc_zkp_dl_check(v, g, a, c, r), "zkp was false, should be true");

	gcry_mpi_release(c);
	gcry_mpi_release(r);
	gcry_mpi_release(s);
	gcry_mpi_release(x);
	gcry_mpi_point_release(a);
	gcry_mpi_point_release(g);
	gcry_mpi_point_release(v);
}

int
main (int argc, char *argv[])
{
	int repeat = 50;
	int i;

	BRANDT_init();

	for (i = 0; i < repeat; i++)
	{
		run(test_brandt_ec_keypair_create);
		run(test_smc_zkp_dl);
	}

	return ret;
}