* used. The extra state information to record how much of the
* 64bit block we have used is contained in *num;
*/
-void RC2_ofb64_encrypt(unsigned char *in, unsigned char *out, long length,
- RC2_KEY *schedule, unsigned char *ivec, int *num)
+void RC2_ofb64_encrypt(const unsigned char *in, unsigned char *out,
+ long length, RC2_KEY *schedule, unsigned char *ivec,
+ int *num)
{
register unsigned long v0,v1,t;
register int n= *num;