void fcrypt_body (DES_LONG * out, DES_key_schedule * ks, DES_LONG Eswap0, DES_LONG Eswap1)
{
register DES_LONG l, r, t, u;
#ifdef DES_PTR
register const unsigned char *des_SP = (const unsigned char *) DES_SPtrans;
#endif
register DES_LONG *s;
register int j;
register DES_LONG E0, E1;
l = 0;
r = 0;
s = (DES_LONG *) ks;
E0 = Eswap0;
E1 = Eswap1;
for (j = 0; j < 25; j++)
{
#ifndef DES_UNROLL
register int i;
for (i = 0; i < 32; i += 4)
{
D_ENCRYPT (l, r, i + 0); /* 1 */
D_ENCRYPT (r, l, i + 2); /* 2 */
}
#else
D_ENCRYPT (l, r, 0); /* 1 */
D_ENCRYPT (r, l, 2); /* 2 */
D_ENCRYPT (l, r, 4); /* 3 */
D_ENCRYPT (r, l, 6); /* 4 */
D_ENCRYPT (l, r, 8); /* 5 */
D_ENCRYPT (r, l, 10); /* 6 */
D_ENCRYPT (l, r, 12); /* 7 */
D_ENCRYPT (r, l, 14); /* 8 */
D_ENCRYPT (l, r, 16); /* 9 */
D_ENCRYPT (r, l, 18); /* 10 */
D_ENCRYPT (l, r, 20); /* 11 */
D_ENCRYPT (r, l, 22); /* 12 */
D_ENCRYPT (l, r, 24); /* 13 */
D_ENCRYPT (r, l, 26); /* 14 */
D_ENCRYPT (l, r, 28); /* 15 */
D_ENCRYPT (r, l, 30); /* 16 */
#endif
t = l;
l = r;
r = t;
}
l = ROTATE (l, 3) & 0xffffffffL;
r = ROTATE (r, 3) & 0xffffffffL;
PERM_OP (l, r, t, 1, 0x55555555L);
PERM_OP (r, l, t, 8, 0x00ff00ffL);
PERM_OP (l, r, t, 2, 0x33333333L);
PERM_OP (r, l, t, 16, 0x0000ffffL);
PERM_OP (l, r, t, 4, 0x0f0f0f0fL);
out[0] = r;
out[1] = l;
}
void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc)
{
register DES_LONG l, r, t, u;
#ifdef DES_PTR
register const unsigned char *des_SP = (const unsigned char *)DES_SPtrans;
#endif
#ifndef DES_UNROLL
register int i;
#endif
register DES_LONG *s;
r = data[0];
l = data[1];
IP(r, l);
/*
* Things have been modified so that the initial rotate is done outside
* the loop. This required the DES_SPtrans values in sp.h to be rotated
* 1 bit to the right. One perl script later and things have a 5% speed
* up on a sparc2. Thanks to Richard Outerbridge
* <*****@*****.**> for pointing this out.
*/
/* clear the top bits on machines with 8byte longs */
/* shift left by 2 */
r = ROTATE(r, 29) & 0xffffffffL;
l = ROTATE(l, 29) & 0xffffffffL;
s = ks->ks->deslong;
/*
* I don't know if it is worth the effort of loop unrolling the inner
* loop
*/
if (enc) {
#ifdef DES_UNROLL
D_ENCRYPT(l, r, 0); /* 1 */
D_ENCRYPT(r, l, 2); /* 2 */
D_ENCRYPT(l, r, 4); /* 3 */
D_ENCRYPT(r, l, 6); /* 4 */
D_ENCRYPT(l, r, 8); /* 5 */
D_ENCRYPT(r, l, 10); /* 6 */
D_ENCRYPT(l, r, 12); /* 7 */
D_ENCRYPT(r, l, 14); /* 8 */
D_ENCRYPT(l, r, 16); /* 9 */
D_ENCRYPT(r, l, 18); /* 10 */
D_ENCRYPT(l, r, 20); /* 11 */
D_ENCRYPT(r, l, 22); /* 12 */
D_ENCRYPT(l, r, 24); /* 13 */
D_ENCRYPT(r, l, 26); /* 14 */
D_ENCRYPT(l, r, 28); /* 15 */
D_ENCRYPT(r, l, 30); /* 16 */
#else
for (i = 0; i < 32; i += 4) {
D_ENCRYPT(l, r, i + 0); /* 1 */
D_ENCRYPT(r, l, i + 2); /* 2 */
}
#endif
} else {
#ifdef DES_UNROLL
D_ENCRYPT(l, r, 30); /* 16 */
D_ENCRYPT(r, l, 28); /* 15 */
D_ENCRYPT(l, r, 26); /* 14 */
D_ENCRYPT(r, l, 24); /* 13 */
D_ENCRYPT(l, r, 22); /* 12 */
D_ENCRYPT(r, l, 20); /* 11 */
D_ENCRYPT(l, r, 18); /* 10 */
D_ENCRYPT(r, l, 16); /* 9 */
D_ENCRYPT(l, r, 14); /* 8 */
D_ENCRYPT(r, l, 12); /* 7 */
D_ENCRYPT(l, r, 10); /* 6 */
D_ENCRYPT(r, l, 8); /* 5 */
D_ENCRYPT(l, r, 6); /* 4 */
D_ENCRYPT(r, l, 4); /* 3 */
D_ENCRYPT(l, r, 2); /* 2 */
D_ENCRYPT(r, l, 0); /* 1 */
#else
for (i = 30; i > 0; i -= 4) {
D_ENCRYPT(l, r, i - 0); /* 16 */
D_ENCRYPT(r, l, i - 2); /* 15 */
}
#endif
}
/* rotate and clear the top bits on machines with 8byte longs */
l = ROTATE(l, 3) & 0xffffffffL;
r = ROTATE(r, 3) & 0xffffffffL;
FP(r, l);
data[0] = l;
data[1] = r;
l = r = t = u = 0;
}
void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc)
{
DES_LONG l,r,t,u;
#ifdef DES_PTR
const unsigned char *des_SP=(const unsigned char *)des_SPtrans;
#endif
#ifndef DES_UNROLL
int i;
#endif
DES_LONG *s;
r=data[0];
l=data[1];
/* Things have been modified so that the initial rotate is
* done outside the loop. This required the
* des_SPtrans values in sp.h to be rotated 1 bit to the right.
* One perl script later and things have a 5% speed up on a sparc2.
* Thanks to Richard Outerbridge <*****@*****.**>
* for pointing this out. */
/* clear the top bits on machines with 8byte longs */
r=ROTATE(r,29)&0xffffffffL;
l=ROTATE(l,29)&0xffffffffL;
s=ks->ks.deslong;
/* I don't know if it is worth the effort of loop unrolling the
* inner loop */
if (enc)
{
#ifdef DES_UNROLL
D_ENCRYPT(l,r, 0); /* 1 */
D_ENCRYPT(r,l, 2); /* 2 */
D_ENCRYPT(l,r, 4); /* 3 */
D_ENCRYPT(r,l, 6); /* 4 */
D_ENCRYPT(l,r, 8); /* 5 */
D_ENCRYPT(r,l,10); /* 6 */
D_ENCRYPT(l,r,12); /* 7 */
D_ENCRYPT(r,l,14); /* 8 */
D_ENCRYPT(l,r,16); /* 9 */
D_ENCRYPT(r,l,18); /* 10 */
D_ENCRYPT(l,r,20); /* 11 */
D_ENCRYPT(r,l,22); /* 12 */
D_ENCRYPT(l,r,24); /* 13 */
D_ENCRYPT(r,l,26); /* 14 */
D_ENCRYPT(l,r,28); /* 15 */
D_ENCRYPT(r,l,30); /* 16 */
#else
for (i=0; i<32; i+=8)
{
D_ENCRYPT(l,r,i+0); /* 1 */
D_ENCRYPT(r,l,i+2); /* 2 */
D_ENCRYPT(l,r,i+4); /* 3 */
D_ENCRYPT(r,l,i+6); /* 4 */
}
#endif
}
else
{
#ifdef DES_UNROLL
D_ENCRYPT(l,r,30); /* 16 */
D_ENCRYPT(r,l,28); /* 15 */
D_ENCRYPT(l,r,26); /* 14 */
D_ENCRYPT(r,l,24); /* 13 */
D_ENCRYPT(l,r,22); /* 12 */
D_ENCRYPT(r,l,20); /* 11 */
D_ENCRYPT(l,r,18); /* 10 */
D_ENCRYPT(r,l,16); /* 9 */
D_ENCRYPT(l,r,14); /* 8 */
D_ENCRYPT(r,l,12); /* 7 */
D_ENCRYPT(l,r,10); /* 6 */
D_ENCRYPT(r,l, 8); /* 5 */
D_ENCRYPT(l,r, 6); /* 4 */
D_ENCRYPT(r,l, 4); /* 3 */
D_ENCRYPT(l,r, 2); /* 2 */
D_ENCRYPT(r,l, 0); /* 1 */
#else
for (i=30; i>0; i-=8)
{
D_ENCRYPT(l,r,i-0); /* 16 */
D_ENCRYPT(r,l,i-2); /* 15 */
D_ENCRYPT(l,r,i-4); /* 14 */
D_ENCRYPT(r,l,i-6); /* 13 */
}
#endif
}
/* rotate and clear the top bits on machines with 8byte longs */
data[0]=ROTATE(l,3)&0xffffffffL;
data[1]=ROTATE(r,3)&0xffffffffL;
l=r=t=u=0;
}
