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/*
This file is part of GNUnet.
(C) 2014 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNUnet; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
/**
* @file util/test_crypto_paillier.c
* @brief testcase paillier crypto
* @author Christian Fuchs
* @author Florian Dold
*/
#include "platform.h"
#include "gnunet_util_lib.h"
#include <gcrypt.h>
int
test_crypto ()
{
gcry_mpi_t plaintext;
gcry_mpi_t plaintext_result;
struct GNUNET_CRYPTO_PaillierCiphertext ciphertext;
struct GNUNET_CRYPTO_PaillierPublicKey public_key;
struct GNUNET_CRYPTO_PaillierPrivateKey private_key;
GNUNET_CRYPTO_paillier_create (&public_key, &private_key);
GNUNET_assert (NULL != (plaintext = gcry_mpi_new (0)));
GNUNET_assert (NULL != (plaintext_result = gcry_mpi_new (0)));
gcry_mpi_randomize (plaintext, GNUNET_CRYPTO_PAILLIER_BITS / 2, GCRY_WEAK_RANDOM);
GNUNET_CRYPTO_paillier_encrypt (&public_key, plaintext, 0, &ciphertext);
GNUNET_CRYPTO_paillier_decrypt (&private_key, &public_key,
&ciphertext, plaintext_result);
if (0 != gcry_mpi_cmp (plaintext, plaintext_result))
{
printf ("paillier failed with plaintext of size %u\n", gcry_mpi_get_nbits (plaintext));
gcry_log_debugmpi("\n", plaintext);
gcry_log_debugmpi("\n", plaintext_result);
return 1;
}
return 0;
}
int
test_hom()
{
int ret;
gcry_mpi_t m1;
gcry_mpi_t m2;
gcry_mpi_t result;
gcry_mpi_t hom_result;
struct GNUNET_CRYPTO_PaillierCiphertext c1;
struct GNUNET_CRYPTO_PaillierCiphertext c2;
struct GNUNET_CRYPTO_PaillierCiphertext c_result;
struct GNUNET_CRYPTO_PaillierPublicKey public_key;
struct GNUNET_CRYPTO_PaillierPrivateKey private_key;
GNUNET_CRYPTO_paillier_create (&public_key, &private_key);
GNUNET_assert (NULL != (m1 = gcry_mpi_new (0)));
GNUNET_assert (NULL != (m2 = gcry_mpi_new (0)));
GNUNET_assert (NULL != (result = gcry_mpi_new (0)));
GNUNET_assert (NULL != (hom_result = gcry_mpi_new (0)));
//gcry_mpi_randomize (m1, GNUNET_CRYPTO_PAILLIER_BITS-2, GCRY_WEAK_RANDOM);
m1 = gcry_mpi_set_ui(m1,1);
gcry_mpi_mul_2exp(m1,m1,GNUNET_CRYPTO_PAILLIER_BITS-3);
//gcry_mpi_randomize (m2, GNUNET_CRYPTO_PAILLIER_BITS-2, GCRY_WEAK_RANDOM);
m2 = gcry_mpi_set_ui(m2,1);
gcry_mpi_mul_2exp(m2,m2,GNUNET_CRYPTO_PAILLIER_BITS-3);
gcry_mpi_add(result,m1,m2);
if (1 != (ret = GNUNET_CRYPTO_paillier_encrypt (&public_key, m1, 2, &c1))){
printf ("GNUNET_CRYPTO_paillier_encrypt 1 failed, should return 1 allowed operation, got %d!\n", ret);
return 1;
}
if (1 != (ret = GNUNET_CRYPTO_paillier_encrypt (&public_key, m2, 2, &c2))){
printf ("GNUNET_CRYPTO_paillier_encrypt 2 failed, should return 1 allowed operation, got %d!\n", ret);
return 1;
}
if (0 != (ret = GNUNET_CRYPTO_paillier_hom_add (&public_key, &c1,&c2, &c_result))){
printf ("GNUNET_CRYPTO_paillier_hom_add failed, expected 0 remaining operations, got %d!\n", ret);
return 1;
}
GNUNET_CRYPTO_paillier_decrypt (&private_key, &public_key,
&c_result, hom_result);
gcry_log_debugmpi("\n", hom_result);
gcry_log_debugmpi("\n", result);
if (0 != gcry_mpi_cmp(result, hom_result)){
printf ("GNUNET_CRYPTO_paillier miscalculated!\n");
return 1;
}
return 0;
}
int
main (int argc, char *argv[])
{
int ret;
ret = test_crypto ();
if (0 != ret)
return ret;
ret = test_hom ();
return ret;
}
/* end of test_crypto_paillier.c */
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