/******************************************************************************
- BIKE -- Bit Flipping Key Encapsulation
- Copyright (c) 2021 Nir Drucker, Shay Gueron, Rafael Misoczki, Tobias Oder,
- Tim Gueneysu, Jan Richter-Brockmann.
- Contact: drucker.nir@gmail.com, shay.gueron@gmail.com,
- rafaelmisoczki@google.com, tobias.oder@rub.de, tim.gueneysu@rub.de,
- jan.richter-brockmann@rub.de.
- Permission to use this code for BIKE is granted.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are met:
-
- Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- The names of the contributors may not be used to endorse or promote
- products derived from this software without specific prior written
- permission.
- THIS SOFTWARE IS PROVIDED BY THE AUTHORS ""AS IS"" AND ANY
- EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS CORPORATION OR
- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
******************************************************************************/
ifndef R_DECAPS_H
define R_DECAPS_H
include "types.h"
include "conversions.h"
// transpose a row into a column:
INLINE void transpose(uint8_t col[R_BITS], uint8_t row[R_BITS])
{
col[0] = row[0];
for (uint64_t i = 1; i < R_BITS ; ++i)
{
col[i] = row[(R_BITS) - i];
}
}
// Count number of 1's in tmp:
uint32_t getHammingWeight(const uint8_t tmp[R_BITS], const uint32_t length);
int BGF_decoder(uint8_t e[R_BITS*2],
uint8_t s[R_BITS],
uint32_t h0_compact[DV],
uint32_t h1_compact[DV]);
