<?php
if (class_exists('ParagonIE_Sodium_Core_AEGIS_State128L', false)) {
return;
}
if (!defined('SODIUM_COMPAT_AEGIS_C0')) {
define('SODIUM_COMPAT_AEGIS_C0', "\x00\x01\x01\x02\x03\x05\x08\x0d\x15\x22\x37\x59\x90\xe9\x79\x62");
}
if (!defined('SODIUM_COMPAT_AEGIS_C1')) {
define('SODIUM_COMPAT_AEGIS_C1', "\xdb\x3d\x18\x55\x6d\xc2\x2f\xf1\x20\x11\x31\x42\x73\xb5\x28\xdd");
}
class ParagonIE_Sodium_Core_AEGIS_State128L
{
/** @var array<int, string> $state */
protected $state;
public function __construct()
{
$this->state = array_fill(0, 8, '');
}
/**
* @internal Only use this for unit tests!
* @return string[]
*/
public function getState()
{
return array_values($this->state);
}
/**
* @param array $input
* @return self
* @throws SodiumException
*
* @internal Only for unit tests
*/
public static function initForUnitTests(array $input)
{
if (count($input) < 8) {
throw new SodiumException('invalid input');
}
$state = new self();
for ($i = 0; $i < 8; ++$i) {
$state->state[$i] = $input[$i];
}
return $state;
}
/**
* @param string $key
* @param string $nonce
* @return self
*/
public static function init($key, $nonce)
{
$state = new self();
// S0 = key ^ nonce
$state->state[0] = $key ^ $nonce;
// S1 = C1
$state->state[1] = SODIUM_COMPAT_AEGIS_C1;
// S2 = C0
$state->state[2] = SODIUM_COMPAT_AEGIS_C0;
// S3 = C1
$state->state[3] = SODIUM_COMPAT_AEGIS_C1;
// S4 = key ^ nonce
$state->state[4] = $key ^ $nonce;
// S5 = key ^ C0
$state->state[5] = $key ^ SODIUM_COMPAT_AEGIS_C0;
// S6 = key ^ C1
$state->state[6] = $key ^ SODIUM_COMPAT_AEGIS_C1;
// S7 = key ^ C0
$state->state[7] = $key ^ SODIUM_COMPAT_AEGIS_C0;
// Repeat(10, Update(nonce, key))
for ($i = 0; $i < 10; ++$i) {
$state->update($nonce, $key);
}
return $state;
}
/**
* @param string $ai
* @return self
*/
public function absorb($ai)
{
if (ParagonIE_Sodium_Core_Util::strlen($ai) !== 32) {
throw new SodiumException('Input must be two AES blocks in size');
}
$t0 = ParagonIE_Sodium_Core_Util::substr($ai, 0, 16);
$t1 = ParagonIE_Sodium_Core_Util::substr($ai, 16, 16);
return $this->update($t0, $t1);
}
/**
* @param string $ci
* @return string
* @throws SodiumException
*/
public function dec($ci)
{
if (ParagonIE_Sodium_Core_Util::strlen($ci) !== 32) {
throw new SodiumException('Input must be two AES blocks in size');
}
// z0 = S6 ^ S1 ^ (S2 & S3)
$z0 = $this->state[6]
^ $this->state[1]
^ ParagonIE_Sodium_Core_Util::andStrings($this->state[2], $this->state[3]);
// z1 = S2 ^ S5 ^ (S6 & S7)
$z1 = $this->state[2]
^ $this->state[5]
^ ParagonIE_Sodium_Core_Util::andStrings($this->state[6], $this->state[7]);
// t0, t1 = Split(xi, 128)
$t0 = ParagonIE_Sodium_Core_Util::substr($ci, 0, 16);
$t1 = ParagonIE_Sodium_Core_Util::substr($ci, 16, 16);
// out0 = t0 ^ z0
// out1 = t1 ^ z1
$out0 = $t0 ^ $z0;
$out1 = $t1 ^ $z1;
// Update(out0, out1)
// xi = out0 || out1
$this->update($out0, $out1);
return $out0 . $out1;
}
/**
* @param string $cn
* @return string
*/
public function decPartial($cn)
{
$len = ParagonIE_Sodium_Core_Util::strlen($cn);
// z0 = S6 ^ S1 ^ (S2 & S3)
$z0 = $this->state[6]
^ $this->state[1]
^ ParagonIE_Sodium_Core_Util::andStrings($this->state[2], $this->state[3]);
// z1 = S2 ^ S5 ^ (S6 & S7)
$z1 = $this->state[2]
^ $this->state[5]
^ ParagonIE_Sodium_Core_Util::andStrings($this->state[6], $this->state[7]);
// t0, t1 = Split(ZeroPad(cn, 256), 128)
$cn = str_pad($cn, 32, "\0", STR_PAD_RIGHT);
$t0 = ParagonIE_Sodium_Core_Util::substr($cn, 0, 16);
$t1 = ParagonIE_Sodium_Core_Util::substr($cn, 16, 16);
// out0 = t0 ^ z0
// out1 = t1 ^ z1
$out0 = $t0 ^ $z0;
$out1 = $t1 ^ $z1;
// xn = Truncate(out0 || out1, |cn|)
$xn = ParagonIE_Sodium_Core_Util::substr($out0 . $out1, 0, $len);
// v0, v1 = Split(ZeroPad(xn, 256), 128)
$padded = str_pad($xn, 32, "\0", STR_PAD_RIGHT);
$v0 = ParagonIE_Sodium_Core_Util::substr($padded, 0, 16);
$v1 = ParagonIE_Sodium_Core_Util::substr($padded, 16, 16);
// Update(v0, v1)
$this->update($v0, $v1);
// return xn
return $xn;
}
/**
* @param string $xi
* @return string
* @throws SodiumException
*/
public function enc($xi)
{
if (ParagonIE_Sodium_Core_Util::strlen($xi) !== 32) {
throw new SodiumException('Input must be two AES blocks in size');
}
// z0 = S6 ^ S1 ^ (S2 & S3)
$z0 = $this->state[6]
^ $this->state[1]
^ ParagonIE_Sodium_Core_Util::andStrings($this->state[2], $this->state[3]);
// z1 = S2 ^ S5 ^ (S6 & S7)
$z1 = $this->state[2]
^ $this->state[5]
^ ParagonIE_Sodium_Core_Util::andStrings($this->state[6], $this->state[7]);
// t0, t1 = Split(xi, 128)
$t0 = ParagonIE_Sodium_Core_Util::substr($xi, 0, 16);
$t1 = ParagonIE_Sodium_Core_Util::substr($xi, 16, 16);
// out0 = t0 ^ z0
// out1 = t1 ^ z1
$out0 = $t0 ^ $z0;
$out1 = $t1 ^ $z1;
// Update(t0, t1)
// ci = out0 || out1
$this->update($t0, $t1);
// return ci
return $out0 . $out1;
}
/**
* @param int $ad_len_bits
* @param int $msg_len_bits
* @return string
*/
public function finalize($ad_len_bits, $msg_len_bits)
{
$encoded = ParagonIE_Sodium_Core_Util::store64_le($ad_len_bits) .
ParagonIE_Sodium_Core_Util::store64_le($msg_len_bits);
$t = $this->state[2] ^ $encoded;
for ($i = 0; $i < 7; ++$i) {
$this->update($t, $t);
}
return ($this->state[0] ^ $this->state[1] ^ $this->state[2] ^ $this->state[3]) .
($this->state[4] ^ $this->state[5] ^ $this->state[6] ^ $this->state[7]);
}
/**
* @param string $m0
* @param string $m1
* @return self
*/
public function update($m0, $m1)
{
/*
S'0 = AESRound(S7, S0 ^ M0)
S'1 = AESRound(S0, S1)
S'2 = AESRound(S1, S2)
S'3 = AESRound(S2, S3)
S'4 = AESRound(S3, S4 ^ M1)
S'5 = AESRound(S4, S5)
S'6 = AESRound(S5, S6)
S'7 = AESRound(S6, S7)
*/
list($s_0, $s_1) = ParagonIE_Sodium_Core_AES::doubleRound(
$this->state[7], $this->state[0] ^ $m0,
$this->state[0], $this->state[1]
);
list($s_2, $s_3) = ParagonIE_Sodium_Core_AES::doubleRound(
$this->state[1], $this->state[2],
$this->state[2], $this->state[3]
);
list($s_4, $s_5) = ParagonIE_Sodium_Core_AES::doubleRound(
$this->state[3], $this->state[4] ^ $m1,
$this->state[4], $this->state[5]
);
list($s_6, $s_7) = ParagonIE_Sodium_Core_AES::doubleRound(
$this->state[5], $this->state[6],
$this->state[6], $this->state[7]
);
/*
S0 = S'0
S1 = S'1
S2 = S'2
S3 = S'3
S4 = S'4
S5 = S'5
S6 = S'6
S7 = S'7
*/
$this->state[0] = $s_0;
$this->state[1] = $s_1;
$this->state[2] = $s_2;
$this->state[3] = $s_3;
$this->state[4] = $s_4;
$this->state[5] = $s_5;
$this->state[6] = $s_6;
$this->state[7] = $s_7;
return $this;
}
}
ما بقاش الذكاء الاصطناعي مجرد خيال علمي أو تطور مستنيينه في المستقبل… لأ، ده بقى واقع عايشينه كل يوم، وبيأثر بشكل مباشر على شغلنا، ومهاراتنا، وحتى على الوظايف نفسها. في الفيديو ده، هنتكلم عن إزاي الذكاء الاصطناعي قلب موازين سوق العمل، إيه المهن اللي بدأت تختفي، وإيه اللي طلع جديد، وإزاي نجهز نفسنا للمستقبل اللي بدأ خلاص.