typedef unsigned char bf_cblock[8];/* Define IntU32 to be an unsigned in 32 bits long */typedef unsigned int IntU32 ;typedef unsigned char IntU8 ;/* Define IntP to be an integer which   is the same size as a pointer. */typedef unsigned long IntP ;#define NROUNDS         16/* blowfish internal key size = 4 * ( ( 2 * ( NROUNDS + 2 ) ) + ( 4 * 256 ) ) */#define BF_KEY_SIZE = 4240;typedef struct{  IntU32 p[2][NROUNDS+2],         sbox[4][256];} BFkey_type; int blowfish_make_bfkey( unsigned char * key_string, int keylength, BFkey_type * bfkey );void blowfish_crypt( bf_cblock source, bf_cblock dest, BFkey_type * bfkey, short direction );