-void BF_cfb64_encrypt(unsigned char *in, unsigned char *out, long length,
- BF_KEY *schedule, unsigned char *ivec, int *num, int encrypt)
- {
- register BF_LONG v0,v1,t;
- register int n= *num;
- register long l=length;
- BF_LONG ti[2];
- unsigned char *iv,c,cc;
-
- iv=(unsigned char *)ivec;
- if (encrypt)
- {
- while (l--)
- {
- if (n == 0)
- {
- n2l(iv,v0); ti[0]=v0;
- n2l(iv,v1); ti[1]=v1;
- BF_encrypt((BF_LONG *)ti,schedule);
- iv=(unsigned char *)ivec;
- t=ti[0]; l2n(t,iv);
- t=ti[1]; l2n(t,iv);
- iv=(unsigned char *)ivec;
- }
- c= *(in++)^iv[n];
- *(out++)=c;
- iv[n]=c;
- n=(n+1)&0x07;
- }
- }
- else
- {
- while (l--)
- {
- if (n == 0)
- {
- n2l(iv,v0); ti[0]=v0;
- n2l(iv,v1); ti[1]=v1;
- BF_encrypt((BF_LONG *)ti,schedule);
- iv=(unsigned char *)ivec;
- t=ti[0]; l2n(t,iv);
- t=ti[1]; l2n(t,iv);
- iv=(unsigned char *)ivec;
- }
- cc= *(in++);
- c=iv[n];
- iv[n]=cc;
- *(out++)=c^cc;
- n=(n+1)&0x07;
- }
- }
- v0=v1=ti[0]=ti[1]=t=c=cc=0;
- *num=n;
- }
+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;
+ register long l = length;
+ BF_LONG ti[2];
+ unsigned char *iv, c, cc;