fame.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_FAME_H
#define CIFER_FAME_H
 
#include <gmp.h>
#include <amcl/fp12_BN254.h>
#include <amcl/ecp_BN254.h>
#include <amcl/ecp2_BN254.h>
 
#include "cifer/data/vec.h"
#include "cifer/abe/policy.h"
#include "cifer/internal/errors.h"
 
typedef struct cfe_fame {
    mpz_t p;
} cfe_fame;
 
typedef struct cfe_fame_pub_key {
    ECP2_BN254 part_G2[2];
    FP12_BN254 part_GT[2];
} cfe_fame_pub_key;
 
typedef struct cfe_fame_sec_key {
    mpz_t part_int[4];
    ECP_BN254 part_G1[3];
} cfe_fame_sec_key;
 
typedef struct cfe_fame_cipher {
    ECP2_BN254 ct0[3];
    ECP_BN254 (*ct)[3];
    FP12_BN254 ct_prime;
    cfe_msp msp;
} cfe_fame_cipher;
 
typedef struct cfe_fame_attrib_keys {
    ECP2_BN254 k0[3];
    ECP_BN254 (*k)[3];
    ECP_BN254 k_prime[3];
    int *row_to_attrib;
    size_t num_attrib;
} cfe_fame_attrib_keys;
 
void cfe_fame_init(cfe_fame *fame);
 
void cfe_fame_free(cfe_fame *fame);
 
void cfe_fame_sec_key_init(cfe_fame_sec_key *sk);
 
void cfe_fame_sec_key_free(cfe_fame_sec_key *sk);
 
void cfe_fame_generate_master_keys(cfe_fame_pub_key *pk,
                                   cfe_fame_sec_key *sk, cfe_fame *fame);
 
void cfe_fame_cipher_init(cfe_fame_cipher *cipher, cfe_msp *msp);
 
void cfe_fame_cipher_free(cfe_fame_cipher *cipher);
 
// TODO: change message to be a string when mapping is defined
void cfe_fame_encrypt(cfe_fame_cipher *cipher, FP12_BN254 *msg,
                      cfe_msp *msp, cfe_fame_pub_key *pk, cfe_fame *fame);
 
void cfe_fame_attrib_keys_init(cfe_fame_attrib_keys *keys, size_t num_attrib);
 
void cfe_fame_attrib_keys_free(cfe_fame_attrib_keys *keys);
 
void cfe_fame_generate_attrib_keys(cfe_fame_attrib_keys *keys, int *gamma,
                                   size_t num_attrib, cfe_fame_sec_key *sk, cfe_fame *fame);
 
// TODO: change decryption to be a string when mapping is defined
cfe_error cfe_fame_decrypt(FP12_BN254 *res, cfe_fame_cipher *cipher,
                           cfe_fame_attrib_keys *keys, cfe_fame *fame);
 
#endif