-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;
- {
- register DES_LONG v0,v1;
- register long l=length;
- register int n= *num;
- DES_LONG ti[2];
- unsigned char *iv,c,cc;
-
- iv=(unsigned char *)ivec;
- if (enc)
- {
- while (l--)
- {
- if (n == 0)
- {
- c2l(iv,v0); ti[0]=v0;
- c2l(iv,v1); ti[1]=v1;
- des_encrypt((DES_LONG *)ti,
- schedule,DES_ENCRYPT);
- iv=(unsigned char *)ivec;
- v0=ti[0]; l2c(v0,iv);
- v0=ti[1]; l2c(v0,iv);
- iv=(unsigned char *)ivec;
- }
- c= *(in++)^iv[n];
- *(out++)=c;
- iv[n]=c;
- n=(n+1)&0x07;
- }
- }
- else
- {
- while (l--)
- {
- if (n == 0)
- {
- c2l(iv,v0); ti[0]=v0;
- c2l(iv,v1); ti[1]=v1;
- des_encrypt((DES_LONG *)ti,
- schedule,DES_ENCRYPT);
- iv=(unsigned char *)ivec;
- v0=ti[0]; l2c(v0,iv);
- v0=ti[1]; l2c(v0,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]=c=cc=0;
- *num=n;
- }
+void DES_cfb64_encrypt(const unsigned char *in, unsigned char *out,
+ long length, DES_key_schedule *schedule,
+ DES_cblock *ivec, int *num, int enc)
+{
+ register DES_LONG v0, v1;
+ register long l = length;
+ register int n = *num;
+ DES_LONG ti[2];
+ unsigned char *iv, c, cc;