egcs.h

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#ifndef HCS_EGCS_H
#define HCS_EGCS_H

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

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
    mpz_t c1;   
    mpz_t c2;   
} egcs_cipher;

typedef struct {
    mpz_t g;    
    mpz_t q;    
    mpz_t h;    
} egcs_public_key;

typedef struct {
    mpz_t x;    
    mpz_t q;    
} egcs_private_key;

egcs_public_key*  egcs_init_public_key(void);

egcs_private_key* egcs_init_private_key(void);

void egcs_generate_key_pair(egcs_public_key *pk, egcs_private_key *vk,
                            hcs_random *hr, const unsigned long bits);

egcs_cipher* egcs_init_cipher(void);

void egcs_set(egcs_cipher *rop, egcs_cipher *op);

void egcs_encrypt(egcs_public_key *pk, hcs_random *hr, egcs_cipher *rop,
                  mpz_t plain1);

void egcs_ee_mul(egcs_public_key *pk, egcs_cipher *rop, egcs_cipher *ct1,
        egcs_cipher *ct2);

void egcs_decrypt(egcs_private_key *vk, mpz_t rop, egcs_cipher *cipher1);

void egcs_clear_cipher(egcs_cipher *ct);

void egcs_free_cipher(egcs_cipher *ct);

void egcs_clear_public_key(egcs_public_key *pk);

void egcs_clear_private_key(egcs_private_key *vk);

void egcs_free_public_key(egcs_public_key *pk);

void egcs_free_private_key(egcs_private_key *vk);

#ifdef __cplusplus
}
#endif

#endif