djcs.h

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#ifndef HCS_DJCS_H
#define HCS_DJCS_H

#include <gmp.h>
#include "hcs_random.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    unsigned long s; 
    mpz_t *n;        
    mpz_t g;         
} djcs_public_key;

typedef struct {
    unsigned long s; 
    mpz_t *n;        
    mpz_t d;         
    mpz_t mu;        
} djcs_private_key;

djcs_public_key*  djcs_init_public_key(void);

djcs_private_key* djcs_init_private_key(void);

int djcs_generate_key_pair(djcs_public_key *pk, djcs_private_key *vk,
                           hcs_random *hr, unsigned long s, unsigned long bits);

void djcs_encrypt(djcs_public_key *pk, hcs_random *hr, mpz_t rop, mpz_t plain1);

void djcs_reencrypt(djcs_public_key *pk, hcs_random *hr, mpz_t rop, mpz_t op);

void djcs_ep_add(djcs_public_key *pk, mpz_t rop, mpz_t cipher1, mpz_t plain1);

void djcs_ee_add(djcs_public_key *pk, mpz_t rop, mpz_t cipher1, mpz_t cipher2);

void djcs_ep_mul(djcs_public_key *pk, mpz_t rop, mpz_t cipher1, mpz_t plain1);

void djcs_decrypt(djcs_private_key *vk, mpz_t rop, mpz_t cipher1);

void djcs_clear_public_key(djcs_public_key *pk);

void djcs_clear_private_key(djcs_private_key *vk);

void djcs_free_public_key(djcs_public_key *pk);

void djcs_free_private_key(djcs_private_key *vk);

int djcs_verify_key_pair(djcs_public_key *pk, djcs_private_key *vk);

char* djcs_export_public_key(djcs_public_key *pk);

char* djcs_export_private_key(djcs_private_key *vk);

int djcs_import_public_key(djcs_public_key *pk, const char *json);

int djcs_import_private_key(djcs_private_key *vk, const char *json);

#ifdef __cplusplus
}
#endif

#endif