BIGNUM *add, BIGNUM *rem, BN_CTX *ctx);
static int probable_prime_dh_strong(BIGNUM *rnd, int bits,
BIGNUM *add, BIGNUM *rem, BN_CTX *ctx);
BIGNUM *add, BIGNUM *rem, BN_CTX *ctx);
static int probable_prime_dh_strong(BIGNUM *rnd, int bits,
BIGNUM *add, BIGNUM *rem, BN_CTX *ctx);