-void BF_set_key(BF_KEY *key, int len, unsigned char *data);
-void BF_ecb_encrypt(unsigned char *in,unsigned char *out,BF_KEY *key,
- int enc);
-void BF_encrypt(BF_LONG *data,BF_KEY *key,int enc);
-void BF_cbc_encrypt(unsigned char *in, unsigned char *out, long length,
- BF_KEY *ks, unsigned char *iv, int enc);
-void BF_cfb64_encrypt(unsigned char *in, unsigned char *out, long length,
- 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);