void RC2_set_key(RC2_KEY *key, int len, const unsigned char *data,int bits);
void RC2_ecb_encrypt(const unsigned char *in,unsigned char *out,RC2_KEY *key,
int enc);
void RC2_set_key(RC2_KEY *key, int len, const unsigned char *data,int bits);
void RC2_ecb_encrypt(const unsigned char *in,unsigned char *out,RC2_KEY *key,
int enc);