* 64bit block we have used is contained in *num;
*/
-void BF_cfb64_encrypt(unsigned char *in, unsigned char *out, long length,
- BF_KEY *schedule, unsigned char *ivec, int *num, int encrypt)
+void BF_cfb64_encrypt(const unsigned char *in, unsigned char *out, long length,
+ const BF_KEY *schedule, unsigned char *ivec, int *num, int encrypt)
{
register BF_LONG v0,v1,t;
register int n= *num;