mirror of
https://github.com/phpseclib/phpseclib.git
synced 2024-11-05 13:07:53 +00:00
Merge pull request #65 from petrich/patch-3
Rijndael: Performance update
This commit is contained in:
terrafrost
commit
7894fd98f5
@ -510,13 +510,13 @@ class Crypt_Rijndael {
|
||||
);
|
||||
|
||||
for ($i = 0; $i < 256; $i++) {
|
||||
$t2[$i << 8] = (($t3[$i] << 8) & 0xFFFFFF00) | (($t3[$i] >> 24) & 0x000000FF);
|
||||
$t1[$i << 16] = (($t3[$i] << 16) & 0xFFFF0000) | (($t3[$i] >> 16) & 0x0000FFFF);
|
||||
$t0[$i << 24] = (($t3[$i] << 24) & 0xFF000000) | (($t3[$i] >> 8) & 0x00FFFFFF);
|
||||
$t2[] = (($t3[$i] << 8) & 0xFFFFFF00) | (($t3[$i] >> 24) & 0x000000FF);
|
||||
$t1[] = (($t3[$i] << 16) & 0xFFFF0000) | (($t3[$i] >> 16) & 0x0000FFFF);
|
||||
$t0[] = (($t3[$i] << 24) & 0xFF000000) | (($t3[$i] >> 8) & 0x00FFFFFF);
|
||||
|
||||
$dt2[$i << 8] = (($this->dt3[$i] << 8) & 0xFFFFFF00) | (($dt3[$i] >> 24) & 0x000000FF);
|
||||
$dt1[$i << 16] = (($this->dt3[$i] << 16) & 0xFFFF0000) | (($dt3[$i] >> 16) & 0x0000FFFF);
|
||||
$dt0[$i << 24] = (($this->dt3[$i] << 24) & 0xFF000000) | (($dt3[$i] >> 8) & 0x00FFFFFF);
|
||||
$dt2[] = (($dt3[$i] << 8) & 0xFFFFFF00) | (($dt3[$i] >> 24) & 0x000000FF);
|
||||
$dt1[] = (($dt3[$i] << 16) & 0xFFFF0000) | (($dt3[$i] >> 16) & 0x0000FFFF);
|
||||
$dt0[] = (($dt3[$i] << 24) & 0xFF000000) | (($dt3[$i] >> 8) & 0x00FFFFFF);
|
||||
}
|
||||
}
|
||||
|
||||
@ -719,7 +719,6 @@ class Crypt_Rijndael {
|
||||
|
||||
$block_size = $this->block_size;
|
||||
$buffer = &$this->enbuffer;
|
||||
$continuousBuffer = $this->continuousBuffer;
|
||||
$ciphertext = '';
|
||||
switch ($this->mode) {
|
||||
case CRYPT_RIJNDAEL_MODE_ECB:
|
||||
@ -853,7 +852,6 @@ class Crypt_Rijndael {
|
||||
|
||||
$block_size = $this->block_size;
|
||||
$buffer = &$this->debuffer;
|
||||
$continuousBuffer = $this->continuousBuffer;
|
||||
$plaintext = '';
|
||||
switch ($this->mode) {
|
||||
case CRYPT_RIJNDAEL_MODE_ECB:
|
||||
@ -985,9 +983,9 @@ class Crypt_Rijndael {
|
||||
$c = $this->c;
|
||||
|
||||
// addRoundKey
|
||||
$i = 0;
|
||||
$i = -1;
|
||||
foreach ($words as $word) {
|
||||
$state[] = $word ^ $w[0][$i++];
|
||||
$state[] = $word ^ $w[0][++$i];
|
||||
}
|
||||
|
||||
// fips-197.pdf#page=19, "Figure 5. Pseudo Code for the Cipher", states that this loop has four components -
|
||||
@ -999,31 +997,28 @@ class Crypt_Rijndael {
|
||||
|
||||
// [1] http://fp.gladman.plus.com/cryptography_technology/rijndael/aes.spec.v316.pdf
|
||||
$temp = array();
|
||||
for ($round = 1; $round < $Nr; $round++) {
|
||||
for ($round = 1; $round < $Nr; ++$round) {
|
||||
$i = 0; // $c[0] == 0
|
||||
$j = $c[1];
|
||||
$k = $c[2];
|
||||
$l = $c[3];
|
||||
|
||||
while ($i < $this->Nb) {
|
||||
$temp[$i] = $t0[$state[$i] & 0xFF000000] ^
|
||||
$t1[$state[$j] & 0x00FF0000] ^
|
||||
$t2[$state[$k] & 0x0000FF00] ^
|
||||
$t3[$state[$l] & 0x000000FF] ^
|
||||
while ($i < $Nb) {
|
||||
$temp[$i] = $t0[$state[$i] >> 24 & 0x000000FF] ^
|
||||
$t1[$state[$j] >> 16 & 0x000000FF] ^
|
||||
$t2[$state[$k] >> 8 & 0x000000FF] ^
|
||||
$t3[$state[$l] & 0x000000FF] ^
|
||||
$w[$round][$i];
|
||||
$i++;
|
||||
++$i;
|
||||
$j = ($j + 1) % $Nb;
|
||||
$k = ($k + 1) % $Nb;
|
||||
$l = ($l + 1) % $Nb;
|
||||
}
|
||||
|
||||
for ($i = 0; $i < $Nb; $i++) {
|
||||
$state[$i] = $temp[$i];
|
||||
}
|
||||
$state = $temp;
|
||||
}
|
||||
|
||||
// subWord
|
||||
for ($i = 0; $i < $Nb; $i++) {
|
||||
for ($i = 0; $i < $Nb; ++$i) {
|
||||
$state[$i] = $this->_subWord($state[$i]);
|
||||
}
|
||||
|
||||
@ -1032,22 +1027,38 @@ class Crypt_Rijndael {
|
||||
$j = $c[1];
|
||||
$k = $c[2];
|
||||
$l = $c[3];
|
||||
while ($i < $this->Nb) {
|
||||
while ($i < $Nb) {
|
||||
$temp[$i] = ($state[$i] & 0xFF000000) ^
|
||||
($state[$j] & 0x00FF0000) ^
|
||||
($state[$k] & 0x0000FF00) ^
|
||||
($state[$l] & 0x000000FF) ^
|
||||
$w[$Nr][$i];
|
||||
$i++;
|
||||
++$i;
|
||||
$j = ($j + 1) % $Nb;
|
||||
$k = ($k + 1) % $Nb;
|
||||
$l = ($l + 1) % $Nb;
|
||||
}
|
||||
|
||||
// 100% ugly switch/case code... but ~5% faster (meaning: ~half second faster de/encrypting 1MB text, tested with php5.4.9 on linux/32bit with an AMD Athlon II P360 CPU) then the commented smart code below. Don't know it's worth or not
|
||||
switch ($Nb) {
|
||||
case 8:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6], $temp[7]);
|
||||
case 7:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6]);
|
||||
case 6:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5]);
|
||||
case 5:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4]);
|
||||
default:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3]);
|
||||
}
|
||||
/*
|
||||
$state = $temp;
|
||||
|
||||
array_unshift($state, 'N*');
|
||||
|
||||
return call_user_func_array('pack', $state);
|
||||
*/
|
||||
}
|
||||
|
||||
/**
|
||||
@ -1062,7 +1073,6 @@ class Crypt_Rijndael {
|
||||
$state = array();
|
||||
$words = unpack('N*word', $in);
|
||||
|
||||
$num_states = count($state);
|
||||
$dw = $this->dw;
|
||||
$dt0 = $this->dt0;
|
||||
$dt1 = $this->dt1;
|
||||
@ -1073,33 +1083,30 @@ class Crypt_Rijndael {
|
||||
$c = $this->c;
|
||||
|
||||
// addRoundKey
|
||||
$i = 0;
|
||||
$i = -1;
|
||||
foreach ($words as $word) {
|
||||
$state[] = $word ^ $dw[$Nr][$i++];
|
||||
$state[] = $word ^ $dw[$Nr][++$i];
|
||||
}
|
||||
|
||||
$temp = array();
|
||||
for ($round = $Nr - 1; $round > 0; $round--) {
|
||||
for ($round = $Nr - 1; $round > 0; --$round) {
|
||||
$i = 0; // $c[0] == 0
|
||||
$j = $Nb - $c[1];
|
||||
$k = $Nb - $c[2];
|
||||
$l = $Nb - $c[3];
|
||||
|
||||
while ($i < $Nb) {
|
||||
$temp[$i] = $dt0[$state[$i] & 0xFF000000] ^
|
||||
$dt1[$state[$j] & 0x00FF0000] ^
|
||||
$dt2[$state[$k] & 0x0000FF00] ^
|
||||
$dt3[$state[$l] & 0x000000FF] ^
|
||||
$temp[$i] = $dt0[$state[$i] >> 24 & 0x000000FF] ^
|
||||
$dt1[$state[$j] >> 16 & 0x000000FF] ^
|
||||
$dt2[$state[$k] >> 8 & 0x000000FF] ^
|
||||
$dt3[$state[$l] & 0x000000FF] ^
|
||||
$dw[$round][$i];
|
||||
$i++;
|
||||
++$i;
|
||||
$j = ($j + 1) % $Nb;
|
||||
$k = ($k + 1) % $Nb;
|
||||
$l = ($l + 1) % $Nb;
|
||||
}
|
||||
|
||||
for ($i = 0; $i < $Nb; $i++) {
|
||||
$state[$i] = $temp[$i];
|
||||
}
|
||||
$state = $temp;
|
||||
}
|
||||
|
||||
// invShiftRows + invSubWord + addRoundKey
|
||||
@ -1114,17 +1121,31 @@ class Crypt_Rijndael {
|
||||
($state[$j] & 0x00FF0000) |
|
||||
($state[$k] & 0x0000FF00) |
|
||||
($state[$l] & 0x000000FF));
|
||||
$i++;
|
||||
++$i;
|
||||
$j = ($j + 1) % $Nb;
|
||||
$k = ($k + 1) % $Nb;
|
||||
$l = ($l + 1) % $Nb;
|
||||
}
|
||||
|
||||
switch ($Nb) {
|
||||
case 8:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6], $temp[7]);
|
||||
case 7:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5], $temp[6]);
|
||||
case 6:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4], $temp[5]);
|
||||
case 5:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3], $temp[4]);
|
||||
default:
|
||||
return pack('N*', $temp[0], $temp[1], $temp[2], $temp[3]);
|
||||
}
|
||||
/*
|
||||
$state = $temp;
|
||||
|
||||
array_unshift($state, 'N*');
|
||||
|
||||
return call_user_func_array('pack', $state);
|
||||
*/
|
||||
}
|
||||
|
||||
/**
|
||||
@ -1224,10 +1245,10 @@ class Crypt_Rijndael {
|
||||
$j = 0;
|
||||
while ($j < $this->Nb) {
|
||||
$dw = $this->_subWord($this->w[$row][$j]);
|
||||
$temp[$j] = $this->dt0[$dw & 0xFF000000] ^
|
||||
$this->dt1[$dw & 0x00FF0000] ^
|
||||
$this->dt2[$dw & 0x0000FF00] ^
|
||||
$this->dt3[$dw & 0x000000FF];
|
||||
$temp[$j] = $this->dt0[$dw >> 24 & 0x000000FF] ^
|
||||
$this->dt1[$dw >> 16 & 0x000000FF] ^
|
||||
$this->dt2[$dw >> 8 & 0x000000FF] ^
|
||||
$this->dt3[$dw & 0x000000FF];
|
||||
$j++;
|
||||
}
|
||||
$this->dw[$row] = $temp;
|
||||
@ -1278,17 +1299,18 @@ class Crypt_Rijndael {
|
||||
$sbox3 = array();
|
||||
|
||||
for ($i = 0; $i < 256; $i++) {
|
||||
$sbox1[$i << 8] = $sbox0[$i] << 8;
|
||||
$sbox2[$i << 16] = $sbox0[$i] << 16;
|
||||
$sbox3[$i << 24] = $sbox0[$i] << 24;
|
||||
$sbox1[] = $sbox0[$i] << 8;
|
||||
$sbox2[] = $sbox0[$i] << 16;
|
||||
$sbox3[] = $sbox0[$i] << 24;
|
||||
}
|
||||
}
|
||||
|
||||
return $sbox0[$word & 0x000000FF] |
|
||||
$sbox1[$word & 0x0000FF00] |
|
||||
$sbox2[$word & 0x00FF0000] |
|
||||
$sbox3[$word & 0xFF000000];
|
||||
return $sbox0[$word & 0x000000FF] |
|
||||
$sbox1[$word >> 8 & 0x000000FF] |
|
||||
$sbox2[$word >> 16 & 0x000000FF] |
|
||||
$sbox3[$word >> 24 & 0x000000FF];
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Performs inverse S-Box substitutions
|
||||
@ -1324,16 +1346,16 @@ class Crypt_Rijndael {
|
||||
$sbox3 = array();
|
||||
|
||||
for ($i = 0; $i < 256; $i++) {
|
||||
$sbox1[$i << 8] = $sbox0[$i] << 8;
|
||||
$sbox2[$i << 16] = $sbox0[$i] << 16;
|
||||
$sbox3[$i << 24] = $sbox0[$i] << 24;
|
||||
$sbox1[] = $sbox0[$i] << 8;
|
||||
$sbox2[] = $sbox0[$i] << 16;
|
||||
$sbox3[] = $sbox0[$i] << 24;
|
||||
}
|
||||
}
|
||||
|
||||
return $sbox0[$word & 0x000000FF] |
|
||||
$sbox1[$word & 0x0000FF00] |
|
||||
$sbox2[$word & 0x00FF0000] |
|
||||
$sbox3[$word & 0xFF000000];
|
||||
return $sbox0[$word & 0x000000FF] |
|
||||
$sbox1[$word >> 8 & 0x000000FF] |
|
||||
$sbox2[$word >> 16 & 0x000000FF] |
|
||||
$sbox3[$word >> 24 & 0x000000FF];
|
||||
}
|
||||
|
||||
/**
|
||||
|
||||
Loading…
Reference in New Issue
Block a user