#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import absolute_import, division, print_function
from nacl import exceptions as exc
from nacl._sodium import ffi, lib
from nacl.exceptions import ensure
has_crypto_scalarmult_ed25519 = bool(lib.PYNACL_HAS_CRYPTO_SCALARMULT_ED25519)
crypto_scalarmult_BYTES = lib.crypto_scalarmult_bytes()
crypto_scalarmult_SCALARBYTES = lib.crypto_scalarmult_scalarbytes()
crypto_scalarmult_ed25519_BYTES = 0
crypto_scalarmult_ed25519_SCALARBYTES = 0
if has_crypto_scalarmult_ed25519:
crypto_scalarmult_ed25519_BYTES = lib.crypto_scalarmult_ed25519_bytes()
crypto_scalarmult_ed25519_SCALARBYTES = (
lib.crypto_scalarmult_ed25519_scalarbytes())
def crypto_scalarmult_base(n):
"""
Computes and returns the scalar product of a standard group element and an
integer ``n``.
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from __future__ import absolute_import, division, print_function
from nacl import exceptions as exc
from nacl._sodium import ffi, lib
from nacl.utils import ensure
crypto_scalarmult_BYTES = lib.crypto_scalarmult_bytes()
crypto_scalarmult_SCALARBYTES = lib.crypto_scalarmult_scalarbytes()
def crypto_scalarmult_base(n):
"""
Computes and returns the scalar product of a standard group element and an
integer ``n``.
:param n: bytes
:rtype: bytes
"""
q = ffi.new("unsigned char[]", crypto_scalarmult_BYTES)
rc = lib.crypto_scalarmult_base(q, n)
ensure(rc == 0,