-void des_cfb64_encrypt(in, out, length, schedule, ivec, num, enc)
-unsigned char *in;
-unsigned char *out;
-long length;
-des_key_schedule schedule;
-des_cblock (*ivec);
-int *num;
-int enc;
+void DES_cfb64_encrypt(const unsigned char *in, unsigned char *out,
+ long length, DES_key_schedule *schedule,
+ DES_cblock *ivec, int *num, int enc)