iv=(unsigned char *)ivec;
iv=ivec;
void des_cfb_encrypt(in, out, numbits, length, schedule, ivec, enc)unsigned char *in;unsigned char *out;int numbits;long length;des_key_schedule schedule;des_cblock (*ivec);int enc;	{	register DES_LONG d0,d1,v0,v1,n=(numbits+7)/8;	register DES_LONG mask0,mask1;	register unsigned 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;		}	iv=(unsigned char *)ivec;	c2l(iv,v0);	c2l(iv,v1);	if (enc)		{		while (l >= n)			{			l-=n;			ti[0]=v0;			ti[1]=v1;			des_encrypt((DES_LONG *)ti,schedule,DES_ENCRYPT);			c2ln(in,d0,d1,n);			in+=n;			d0=(d0^ti[0])&mask0;			d1=(d1^ti[1])&mask1;			l2cn(d0,d1,out,n);			out+=n;			/* 30-08-94 - eay - changed because l>>32 and			 * l<<32 are bad under gcc :-( */			if (num == 32)				{ v0=v1; v1=d0; }			else if (num == 64)				{ v0=d0; v1=d1; }			else if (num > 32) /* && num != 64 */				{				v0=((v1>>(num-32))|(d0<<(64-num)))&0xffffffffL;				v1=((d0>>(num-32))|(d1<<(64-num)))&0xffffffffL;				}			else /* num < 32 */				{				v0=((v0>>num)|(v1<<(32-num)))&0xffffffffL;				v1=((v1>>num)|(d0<<(32-num)))&0xffffffffL;				}			}		}	else		{		while (l >= n)			{			l-=n;			ti[0]=v0;			ti[1]=v1;			des_encrypt((DES_LONG *)ti,schedule,DES_ENCRYPT);			c2ln(in,d0,d1,n);			in+=n;			/* 30-08-94 - eay - changed because l>>32 and			 * l<<32 are bad under gcc :-( */			if (num == 32)				{ v0=v1; v1=d0; }			else if (num == 64)				{ v0=d0; v1=d1; }			else if (num > 32) /* && num != 64 */				{				v0=((v1>>(num-32))|(d0<<(64-num)))&0xffffffffL;				v1=((d0>>(num-32))|(d1<<(64-num)))&0xffffffffL;				}			else /* num < 32 */				{				v0=((v0>>num)|(v1<<(32-num)))&0xffffffffL;				v1=((v1>>num)|(d0<<(32-num)))&0xffffffffL;				}			d0=(d0^ti[0])&mask0;			d1=(d1^ti[1])&mask1;			l2cn(d0,d1,out,n);			out+=n;			}		}	iv=(unsigned char *)ivec;	l2c(v0,iv);	l2c(v1,iv);	v0=v1=d0=d1=ti[0]=ti[1]=0;	}