-void des_ofb_encrypt(in, out, numbits, length, schedule, ivec)
-unsigned char *in;
-unsigned char *out;
-int numbits;
-long length;
-des_key_schedule schedule;
-des_cblock (*ivec);
- {
- register DES_LONG d0,d1,v0,v1,n=(numbits+7)/8;
- register DES_LONG mask0,mask1;
- register long l=length;
- register int num=numbits;
- DES_LONG ti[2];
- unsigned char *iv;
+void DES_ofb_encrypt(const unsigned char *in, unsigned char *out, int numbits,
+ long length, DES_key_schedule *schedule,
+ DES_cblock *ivec)
+{
+ register DES_LONG d0, d1, vv0, vv1, v0, v1, n = (numbits + 7) / 8;
+ register DES_LONG mask0, mask1;
+ register long l = length;
+ register int num = numbits;
+ DES_LONG ti[2];
+ unsigned char *iv;
+
+ if (num > 64)
+ return;
+ if (num > 32) {
+ mask0 = 0xffffffffL;
+ if (num >= 64)
+ mask1 = mask0;
+ else
+ mask1 = (1L << (num - 32)) - 1;
+ } else {
+ if (num == 32)
+ mask0 = 0xffffffffL;
+ else
+ mask0 = (1L << num) - 1;
+ mask1 = 0x00000000L;
+ }