BF_KEY *schedule, unsigned char *ivec, int *num, int enc);
void BF_ofb64_encrypt(unsigned char *in, unsigned char *out, long length,
BF_KEY *schedule, unsigned char *ivec, int *num);
-char *BF_options(void);
+const char *BF_options(void);
#else
void BF_cbc_encrypt();
void BF_cfb64_encrypt();
void BF_ofb64_encrypt();
-char *BF_options();
+const char *BF_options();
#endif