91 lines
2 KiB
C++
91 lines
2 KiB
C++
|
|
/*
|
|
* This file is part of Codecrypt.
|
|
*
|
|
* Codecrypt is free software: you can redistribute it and/or modify it
|
|
* under the terms of the GNU Lesser General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* Codecrypt 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 Lesser General Public
|
|
* License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public License
|
|
* along with Codecrypt. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#ifndef _ccr_mce_qcmdpc_h_
|
|
#define _ccr_mce_qcmdpc_h_
|
|
|
|
#include <vector>
|
|
#include <stdint.h>
|
|
|
|
#include "bvector.h"
|
|
#include "matrix.h"
|
|
#include "prng.h"
|
|
#include "sencode.h"
|
|
#include "types.h"
|
|
|
|
/*
|
|
* quasi-cyclic MDPC McEliece
|
|
* Implemented accordingly to the paper by Misoczki, Tillich, Sendrier and Barreto.
|
|
*/
|
|
namespace mce_qcmdpc
|
|
{
|
|
class privkey
|
|
{
|
|
public:
|
|
matrix H; //elems = _cols_ of H blocks (at least 2)
|
|
uint t;
|
|
uint rounds;
|
|
uint delta;
|
|
|
|
int decrypt (const bvector&, bvector&);
|
|
int decrypt (const bvector&, bvector&, bvector&);
|
|
int prepare();
|
|
|
|
uint cipher_size() {
|
|
return H[0].size() * H.size();
|
|
}
|
|
uint plain_size() {
|
|
return H[0].size() * (H.size() - 1);
|
|
}
|
|
uint error_count() {
|
|
return t;
|
|
}
|
|
|
|
sencode* serialize();
|
|
bool unserialize (sencode*);
|
|
};
|
|
|
|
class pubkey
|
|
{
|
|
public:
|
|
matrix G; //elems = top lines of right-side G blocks
|
|
uint t; //error count
|
|
|
|
int encrypt (const bvector&, bvector&, prng&);
|
|
int encrypt (const bvector&, bvector&, const bvector&);
|
|
|
|
uint cipher_size() {
|
|
return G[0].size() * (G.size() + 1);
|
|
}
|
|
uint plain_size() {
|
|
return G[0].size() * G.size();
|
|
}
|
|
uint error_count() {
|
|
return t;
|
|
}
|
|
|
|
sencode* serialize();
|
|
bool unserialize (sencode*);
|
|
};
|
|
|
|
int generate (pubkey&, privkey&, prng&, uint blocksize, uint blocks, uint wi,
|
|
uint t, uint rounds, uint delta);
|
|
}
|
|
|
|
#endif
|