damgard_multi.h

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/*
 * Copyright (c) 2018 XLAB d.o.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * 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.
 */
 
#ifndef CIFER_DAMGARD_MULTI_H
#define CIFER_DAMGARD_MULTI_H
 
#include "cifer/data/mat.h"
#include "cifer/innerprod/fullysec/damgard.h"
 
typedef struct cfe_damgard_multi {
    size_t num_clients;
    mpz_t bound;
    cfe_damgard scheme;
} cfe_damgard_multi;
 
typedef struct cfe_damgard_multi_sec_key {
    size_t num_keys;
    cfe_damgard_sec_key *msk;
    cfe_mat otp;
} cfe_damgard_multi_sec_key;
 
typedef struct cfe_damgard_multi_fe_key {
    cfe_damgard_fe_key *keys;
    mpz_t z;
    size_t num_clients;
} cfe_damgard_multi_fe_key;
 
typedef struct cfe_damgard_multi_client {
    mpz_t bound;
    cfe_damgard scheme;
} cfe_damgard_multi_client;
 
cfe_error cfe_damgard_multi_init(cfe_damgard_multi *m, size_t num_clients, size_t l, size_t modulus_len, mpz_t bound);
 
 
cfe_error cfe_damgard_multi_precomp_init(cfe_damgard_multi *m, size_t num_clients, size_t l, size_t modulus_len, mpz_t bound);
 
void cfe_damgard_multi_free(cfe_damgard_multi *m);
 
void cfe_damgard_multi_copy(cfe_damgard_multi *res, cfe_damgard_multi *m);
 
void cfe_damgard_multi_client_init(cfe_damgard_multi_client *e, cfe_damgard_multi *m);
 
void cfe_damgard_multi_client_free(cfe_damgard_multi_client *e);
 
void cfe_damgard_multi_sec_key_free(cfe_damgard_multi_sec_key *key);
 
void cfe_damgard_multi_fe_key_free(cfe_damgard_multi_fe_key *key);
 
void cfe_damgard_multi_master_keys_init(cfe_mat *mpk, cfe_damgard_multi_sec_key *msk, cfe_damgard_multi *m);
 
void cfe_damgard_multi_generate_master_keys(cfe_mat *mpk, cfe_damgard_multi_sec_key *msk, cfe_damgard_multi *m);
 
void cfe_damgard_multi_fe_key_init(cfe_damgard_multi_fe_key *fe_key, cfe_damgard_multi *m);
 
cfe_error
cfe_damgard_multi_derive_fe_key(cfe_damgard_multi_fe_key *fe_key, cfe_damgard_multi *m, cfe_damgard_multi_sec_key *msk,
                             cfe_mat *y);
 
void cfe_damgard_multi_ciphertext_init(cfe_vec *ciphertext, cfe_damgard_multi_client *e);
 
cfe_error
cfe_damgard_multi_encrypt(cfe_vec *ciphertext, cfe_damgard_multi_client *e, cfe_vec *x, cfe_vec *pub_key, cfe_vec *otp);
 
cfe_error cfe_damgard_multi_decrypt(mpz_t res, cfe_damgard_multi *m, cfe_vec *ciphertext,
                                    cfe_damgard_multi_fe_key *fe_key, cfe_mat *y);
 
#endif