gpsw.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_GPSW_H
#define CIFER_GPSW_H
 
#include <gmp.h>
#include <amcl/fp12_BN254.h>
 
#include "cifer/data/vec_curve.h"
#include "cifer/data/vec.h"
#include "cifer/abe/policy.h"
#include "cifer/internal/errors.h"
 
typedef struct cfe_gpsw {
    size_t l;
    mpz_t p;
} cfe_gpsw;
 
typedef struct cfe_gpsw_pub_key {
    cfe_vec_G2 t;
    FP12_BN254 y;
} cfe_gpsw_pub_key;
 
typedef struct cfe_gpsw_cipher {
    int *gamma;
    FP12_BN254 e0;
    cfe_vec_G2 e;
} cfe_gpsw_cipher;
 
typedef struct cfe_gpsw_key {
    cfe_vec_G1 d;
    cfe_msp msp;
} cfe_gpsw_key;
 
void cfe_gpsw_init(cfe_gpsw *gpsw, size_t l);
 
void cfe_gpsw_master_keys_init(cfe_gpsw_pub_key *pk, cfe_vec *sk, cfe_gpsw *gpsw);
 
void cfe_gpsw_generate_master_keys(cfe_gpsw_pub_key *pk, cfe_vec *sk, cfe_gpsw *gpsw);
 
void cfe_gpsw_cipher_init(cfe_gpsw_cipher *cipher, size_t num_attrib);
 
// TODO: change message to be a string when mapping is defined
void cfe_gpsw_encrypt(cfe_gpsw_cipher *cipher, cfe_gpsw *gpsw, FP12_BN254 *msg,
                      int *gamma, size_t num_attrib, cfe_gpsw_pub_key *pk);
 
void cfe_gpsw_key_init(cfe_gpsw_key *policy_key, cfe_msp *msp);
 
void cfe_gpsw_generate_policy_key(cfe_gpsw_key *key, cfe_gpsw *gpsw, cfe_msp *msp, cfe_vec *sk);
 
void cfe_gpsw_rand_vec_const_sum(cfe_vec *v, mpz_t y, mpz_t p);
 
// TODO: change decryption to be a string when mapping is defined
cfe_error cfe_gpsw_decrypt(FP12_BN254 *res, cfe_gpsw_cipher *cipher, cfe_gpsw_key *key, cfe_gpsw *gpsw);
 
void cfe_gpsw_free(cfe_gpsw *gpsw);
 
void cfe_gpsw_pub_key_free(cfe_gpsw_pub_key *pk);
 
void cfe_gpsw_cipher_free(cfe_gpsw_cipher *cipher);
 
void cfe_gpsw_key_free(cfe_gpsw_key *key);
 
#endif