struct engine_st;
int RAND_set_rand_method(struct engine_st *meth);
-RAND_METHOD *RAND_get_rand_method(void );
+const RAND_METHOD *RAND_get_rand_method(void );
RAND_METHOD *RAND_SSLeay(void);
void RAND_cleanup(void );
int RAND_bytes(unsigned char *buf,int num);