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Wim Lewis
nettle
Commits
fe7695d1
Commit
fe7695d1
authored
Jun 20, 2011
by
Niels Möller
Browse files
Comment fix.
Rev: nettle/serpent-encrypt.c:1.13
parent
aecde8cd
Changes
1
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serpent-encrypt.c
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fe7695d1
...
@@ -66,10 +66,6 @@
...
@@ -66,10 +66,6 @@
(GPL), although some comments in the code still say otherwise. You
(GPL), although some comments in the code still say otherwise. You
are welcome to use Serpent for any application." */
are welcome to use Serpent for any application." */
/* FIXME: Except when used within the key schedule, the inputs are not
used after the substitution, and hence we could allow them to be
destroyed. Can this freedom be used to optimize the sboxes? */
/* S0: 3 8 15 1 10 6 5 11 14 13 4 2 7 0 9 12 */
/* S0: 3 8 15 1 10 6 5 11 14 13 4 2 7 0 9 12 */
/* Could easily let y0, y1 overlap with x0, x1, and possibly also x2 and y2 */
/* Could easily let y0, y1 overlap with x0, x1, and possibly also x2 and y2 */
#define SBOX0(x0, x1, x2, x3, y0, y1, y2, y3) \
#define SBOX0(x0, x1, x2, x3, y0, y1, y2, y3) \
...
@@ -98,24 +94,24 @@
...
@@ -98,24 +94,24 @@
/* S1: 15 12 2 7 9 0 5 10 1 11 14 8 6 13 3 4 */
/* S1: 15 12 2 7 9 0 5 10 1 11 14 8 6 13 3 4 */
/* Original single-assignment form:
/* Original single-assignment form:
t01 = x0 | x3;
0
t01 = x0 | x3;
t02 = x2 ^ x3;
0
t02 = x2 ^ x3;
t03 = ~ x1;
0
t03 = ~ x1;
t04 = x0 ^ x2;
0
t04 = x0 ^ x2;
t05 = x0 | t03;
0
t05 = x0 | t03;
t06 = x3 & t04;
0
t06 = x3 & t04;
t07 = t01 & t02;
0
t07 = t01 & t02;
t08 = x1 | t06;
0
t08 = x1 | t06;
y2 = t02 ^ t05;
0
y2 = t02 ^ t05;
t10 = t07 ^ t08;
0
t10 = t07 ^ t08;
t11 = t01 ^ t10;
0
t11 = t01 ^ t10;
t12 = y2 ^ t11;
0
t12 = y2 ^ t11;
t13 = x1 & x3;
0
t13 = x1 & x3;
y3 = ~ t10;
y3 = ~ t10;
y1 = t13 ^ t12;
0
y1 = t13 ^ t12;
t16 = t10 | y1;
0
t16 = t10 | y1;
t17 = t05 & t16;
0
t17 = t05 & t16;
y0 = x2 ^ t17;
0
y0 = x2 ^ t17;
*/
*/
#define SBOX1(x0, x1, x2, x3, y0, y1, y2, y3) \
#define SBOX1(x0, x1, x2, x3, y0, y1, y2, y3) \
do { \
do { \
...
...
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