#ifndef H_DH
#define H_DH

#define CHAR_SIZE       128
#define PRIVATEKEY_MAX  500
#define PRIVATEKEY_MIN  100

struct bn_dh{
    BIGNUM *bnPrivateKey;
    BIGNUM *bnPublicKey;
    BIGNUM *bnPublicKeyPeer;
    BIGNUM *bnPublicEphemeralKey;
    BN_CTX *ctx;
};
static int generatePrimeNumber(unsigned long long int p);
static BIGNUM *generatePrivateKey();
static void dumpBN(const char *s, BIGNUM *bn);
static int combineKey(BIGNUM **pubKey, BIGNUM *e, BIGNUM *x, BIGNUM *bnP, BN_CTX *ctx);
static BIGNUM *generateP();
static int charToDec(const char *s);
static BIGNUM *generateG(const char *nP);
static void cleanDH(struct bn_dh *dh);

#endif