/*
This file is part of GNUnet.
- Copyright (C) 2014 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2014 GNUnet e.V.
- 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 free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ 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.
+ Affero 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.
+ You should have received a copy of the GNU Affero General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @param[out] private_key Where to store the private key?
*/
void
-GNUNET_CRYPTO_paillier_create (struct GNUNET_CRYPTO_PaillierPublicKey *public_key,
- struct GNUNET_CRYPTO_PaillierPrivateKey *private_key)
+GNUNET_CRYPTO_paillier_create (struct
+ GNUNET_CRYPTO_PaillierPublicKey *public_key,
+ struct GNUNET_CRYPTO_PaillierPrivateKey *
+ private_key)
{
gcry_mpi_t p;
gcry_mpi_t q;
is executed more than once is very very low... */
p = NULL;
q = NULL;
- do {
+ do
+ {
if (NULL != p)
gcry_mpi_release (p);
if (NULL != q)
p,
q);
GNUNET_CRYPTO_mpi_print_unsigned (public_key,
- sizeof (struct GNUNET_CRYPTO_PaillierPublicKey),
+ sizeof(struct
+ GNUNET_CRYPTO_PaillierPublicKey),
n);
/* compute phi(n) = (p-1)(q-1) */
* or -1 if less than one homomorphic operation is possible
*/
int
-GNUNET_CRYPTO_paillier_encrypt1 (const struct GNUNET_CRYPTO_PaillierPublicKey *public_key,
- const gcry_mpi_t m,
- int desired_ops,
- struct GNUNET_CRYPTO_PaillierCiphertext *ciphertext)
+GNUNET_CRYPTO_paillier_encrypt1 (const struct
+ GNUNET_CRYPTO_PaillierPublicKey *public_key,
+ const gcry_mpi_t m,
+ int desired_ops,
+ struct GNUNET_CRYPTO_PaillierCiphertext *
+ ciphertext)
{
int possible_opts;
gcry_mpi_t n_square;
if (possible_opts < 1)
possible_opts = 0;
/* soft-cap by caller */
- possible_opts = (desired_ops < possible_opts)? desired_ops : possible_opts;
+ possible_opts = (desired_ops < possible_opts) ? desired_ops : possible_opts;
ciphertext->remaining_ops = htonl (possible_opts);
GNUNET_CRYPTO_mpi_scan_unsigned (&n,
public_key,
- sizeof (struct GNUNET_CRYPTO_PaillierPublicKey));
+ sizeof(struct
+ GNUNET_CRYPTO_PaillierPublicKey));
highbit = GNUNET_CRYPTO_PAILLIER_BITS - 1;
- while ( (! gcry_mpi_test_bit (n, highbit)) &&
- (0 != highbit) )
+ while ((! gcry_mpi_test_bit (n, highbit)) &&
+ (0 != highbit))
highbit--;
if (0 == highbit)
{
gcry_mpi_mul (n_square, n, n);
/* generate r < n (without bias) */
- do {
+ do
+ {
gcry_mpi_randomize (r, highbit + 1, GCRY_STRONG_RANDOM);
}
while (gcry_mpi_cmp (r, n) >= 0);
* or -1 if less than one homomorphic operation is possible
*/
int
-GNUNET_CRYPTO_paillier_encrypt (const struct GNUNET_CRYPTO_PaillierPublicKey *public_key,
+GNUNET_CRYPTO_paillier_encrypt (const struct
+ GNUNET_CRYPTO_PaillierPublicKey *public_key,
const gcry_mpi_t m,
int desired_ops,
- struct GNUNET_CRYPTO_PaillierCiphertext *ciphertext)
+ struct GNUNET_CRYPTO_PaillierCiphertext *
+ ciphertext)
{
int possible_opts;
gcry_mpi_t n_square;
number has the same length (or is smaller), by counting the
number of possible operations. We essentially divide max_num by
2 until the result is no longer larger than 'm', incrementing the
- maximum number of operations in each round, starting at -2 */
- for (possible_opts = -2; gcry_mpi_cmp (max_num, m) > 0; possible_opts++)
+ maximum number of operations in each round, starting at -2 */for (possible_opts = -2; gcry_mpi_cmp (max_num, m) > 0; possible_opts++)
gcry_mpi_div (max_num,
NULL,
max_num,
GNUNET_CRYPTO_mpi_scan_unsigned (&n,
public_key,
- sizeof (struct GNUNET_CRYPTO_PaillierPublicKey));
+ sizeof(struct
+ GNUNET_CRYPTO_PaillierPublicKey));
/* check public key for number of bits, bail out if key is all zeros */
highbit = GNUNET_CRYPTO_PAILLIER_BITS - 1;
- while ( (! gcry_mpi_test_bit (n, highbit)) &&
- (0 != highbit) )
+ while ((! gcry_mpi_test_bit (n, highbit)) &&
+ (0 != highbit))
highbit--;
if (0 == highbit)
{
}
/* generate r < n (without bias) */
- GNUNET_assert (0 != (r = gcry_mpi_new (0)));
- do {
+ GNUNET_assert (NULL != (r = gcry_mpi_new (0)));
+ do
+ {
gcry_mpi_randomize (r, highbit + 1, GCRY_STRONG_RANDOM);
}
while (gcry_mpi_cmp (r, n) >= 0);
gcry_mpi_release (rn);
GNUNET_CRYPTO_mpi_print_unsigned (ciphertext->bits,
- sizeof (ciphertext->bits),
+ sizeof(ciphertext->bits),
c);
gcry_mpi_release (c);
* @param[out] m Decryption of @a ciphertext with @private_key.
*/
void
-GNUNET_CRYPTO_paillier_decrypt (const struct GNUNET_CRYPTO_PaillierPrivateKey *private_key,
- const struct GNUNET_CRYPTO_PaillierPublicKey *public_key,
- const struct GNUNET_CRYPTO_PaillierCiphertext *ciphertext,
+GNUNET_CRYPTO_paillier_decrypt (const struct
+ GNUNET_CRYPTO_PaillierPrivateKey *private_key,
+ const struct
+ GNUNET_CRYPTO_PaillierPublicKey *public_key,
+ const struct
+ GNUNET_CRYPTO_PaillierCiphertext *ciphertext,
gcry_mpi_t m)
{
gcry_mpi_t mu;
GNUNET_CRYPTO_mpi_scan_unsigned (&lambda,
private_key->lambda,
- sizeof (private_key->lambda));
+ sizeof(private_key->lambda));
GNUNET_CRYPTO_mpi_scan_unsigned (&mu,
private_key->mu,
- sizeof (private_key->mu));
+ sizeof(private_key->mu));
GNUNET_CRYPTO_mpi_scan_unsigned (&n,
public_key,
- sizeof (struct GNUNET_CRYPTO_PaillierPublicKey));
+ sizeof(struct
+ GNUNET_CRYPTO_PaillierPublicKey));
GNUNET_CRYPTO_mpi_scan_unsigned (&c,
ciphertext->bits,
- sizeof (ciphertext->bits));
+ sizeof(ciphertext->bits));
/* n_square = n * n */
GNUNET_assert (0 != (n_square = gcry_mpi_new (0)));
/* mod = cmum1 / n (mod n) */
GNUNET_assert (0 != (mod = gcry_mpi_new (0)));
gcry_mpi_div (mod, NULL, cmum1, n, 0);
+ gcry_mpi_release (cmum1);
/* m = mod * mu mod n */
gcry_mpi_mulm (m, mod, mu, n);
+ gcry_mpi_release (mod);
gcry_mpi_release (mu);
gcry_mpi_release (n);
}
* #GNUNET_SYSERR if no more homomorphic operations are remaining.
*/
int
-GNUNET_CRYPTO_paillier_hom_add (const struct GNUNET_CRYPTO_PaillierPublicKey *public_key,
- const struct GNUNET_CRYPTO_PaillierCiphertext *c1,
- const struct GNUNET_CRYPTO_PaillierCiphertext *c2,
+GNUNET_CRYPTO_paillier_hom_add (const struct
+ GNUNET_CRYPTO_PaillierPublicKey *public_key,
+ const struct
+ GNUNET_CRYPTO_PaillierCiphertext *c1,
+ const struct
+ GNUNET_CRYPTO_PaillierCiphertext *c2,
struct GNUNET_CRYPTO_PaillierCiphertext *result)
{
gcry_mpi_t a;
o1 = (int32_t) ntohl (c1->remaining_ops);
o2 = (int32_t) ntohl (c2->remaining_ops);
- if ( (0 >= o1) || (0 >= o2) )
+ if ((0 >= o1) || (0 >= o2))
{
GNUNET_break_op (0);
return GNUNET_SYSERR;
GNUNET_CRYPTO_mpi_scan_unsigned (&a,
c1->bits,
- sizeof (c1->bits));
+ sizeof(c1->bits));
GNUNET_CRYPTO_mpi_scan_unsigned (&b,
c2->bits,
- sizeof (c2->bits));
+ sizeof(c2->bits));
GNUNET_CRYPTO_mpi_scan_unsigned (&n,
public_key,
- sizeof (struct GNUNET_CRYPTO_PaillierPublicKey));
+ sizeof(struct
+ GNUNET_CRYPTO_PaillierPublicKey));
/* n_square = n * n */
GNUNET_assert (0 != (n_square = gcry_mpi_new (0)));
result->remaining_ops = htonl (GNUNET_MIN (o1, o2) - 1);
GNUNET_CRYPTO_mpi_print_unsigned (result->bits,
- sizeof (result->bits),
+ sizeof(result->bits),
c);
gcry_mpi_release (c);
return ntohl (result->remaining_ops);
* @return the number of remaining homomorphic operations
*/
int
-GNUNET_CRYPTO_paillier_hom_get_remaining (const struct GNUNET_CRYPTO_PaillierCiphertext *c)
+GNUNET_CRYPTO_paillier_hom_get_remaining (const struct
+ GNUNET_CRYPTO_PaillierCiphertext *c)
{
GNUNET_assert (NULL != c);
return ntohl (c->remaining_ops);
}
-/* end of crypto_paillier.c */
+/* end of crypto_paillier.c */
projects / oweals / gnunet.git / blobdiff