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- /* Copyright (C) 2014 Carlos Aguilar Melchor, Joris Barrier, Marc-Olivier Killijian
- * This file is part of XPIR.
- *
- * XPIR 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 of the License, or
- * (at your option) any later version.
- *
- * XPIR 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.
- *
- * You should have received a copy of the GNU General Public License
- * along with XPIR. If not, see <http://www.gnu.org/licenses/>.
- */
- #ifndef DEF_PAILLIER_STRUCT
- #define DEF_PAILLIER_STRUCT
- #include <cstddef>
- #include <gmp.h>
- // Maximum s such that encryption is donne from n^s to n^(s+1)
- #define MAX_S 7
- class paillier_prvkey
- {
- public:
- paillier_prvkey();
- void init_key();
- void clear_key();
- mpz_t d; /* use CRT, d = mod n^s and d = O mod lambda*/
- mpz_t inv_d;
- ~paillier_prvkey();
- };
- class paillier_pubkey
- {
- public:
- paillier_pubkey();
- paillier_pubkey(unsigned int bits, char* rawKey);
- ~paillier_pubkey();
- void init_key();
- void init_key(unsigned int bits, char* rawKey);
- void init_key(unsigned int key_bit_size);
- // Complete nj array up to index s
- void complete_key(unsigned int s);
- // Get nj[s] = n^s initializing it if needed
- mpz_t* getnj(int s);
- // Simple getters
- mpz_t* getg();
- int getinit_s();
- int getbits();
- // Simple setters
- void setinit_s(int init_s_);
- void setbits(int bits_);
- void clear_key();
- private:
- // Bit-size of the modulus
- int bits;
- // nj[s] is n^s, nj[0] is therefore 1 (should not be used)
- mpz_t nj[MAX_S+1];
- // Basic plaintext space is n^init_s and ciphertext space n^(init_s+1)
- unsigned int init_s;
- // Generator, i.e: n+1
- mpz_t g;
- // Function initializing nj[i] for i>=2 when needed
- void init_nj(int i);
- };
- #endif
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