107 lines
2.1 KiB
C++
107 lines
2.1 KiB
C++
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/*
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* This file is part of Codecrypt.
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*
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* Codecrypt is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or (at
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* your option) any later version.
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*
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* Codecrypt is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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* License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with Codecrypt. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _ccr_mce_h_
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#define _ccr_mce_h_
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#include "gf2m.h"
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#include "matrix.h"
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#include "permutation.h"
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#include "polynomial.h"
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#include "prng.h"
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#include "sencode.h"
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/*
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* classical McEliece
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*/
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namespace mce
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{
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class privkey
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{
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public:
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matrix Sinv;
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permutation Pinv;
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polynomial g;
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permutation hperm;
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gf2m fld;
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// derivable things not needed in actual key
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matrix h;
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std::vector<polynomial> sqInv;
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int prepare();
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int decrypt (const bvector&, bvector&);
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int decrypt (const bvector&, bvector&, bvector&);
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int sign (const bvector&, bvector&, uint, uint, prng&);
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uint cipher_size() {
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return Pinv.size();
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}
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uint plain_size() {
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return Sinv.width();
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}
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uint hash_size() {
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return cipher_size();
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}
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uint signature_size() {
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return plain_size();
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}
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uint error_count() {
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return g.degree();
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}
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sencode* serialize();
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bool unserialize (sencode*);
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};
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class pubkey
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{
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public:
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matrix G;
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uint t;
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int encrypt (const bvector&, bvector&, prng&);
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int encrypt (const bvector&, bvector&, const bvector&);
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int verify (const bvector&, const bvector&, uint);
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uint cipher_size() {
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return G.width();
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}
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uint plain_size() {
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return G.height();
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}
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uint hash_size() {
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return cipher_size();
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}
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uint signature_size() {
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return plain_size();
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}
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uint error_count() {
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return t;
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}
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sencode* serialize();
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bool unserialize (sencode*);
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};
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int generate (pubkey&, privkey&, prng&, uint m, uint t);
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}
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#endif
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