Edit file File name : KeySchedule.php Content :<?php if (class_exists('ParagonIE_Sodium_Core_AES_KeySchedule', false)) { return; } /** * @internal This should only be used by sodium_compat */ class ParagonIE_Sodium_Core_AES_KeySchedule { /** @var array<int, int> $skey -- has size 120 */ protected $skey; /** @var bool $expanded */ protected $expanded = false; /** @var int $numRounds */ private $numRounds; /** * @param array $skey * @param int $numRounds */ public function __construct(array $skey, $numRounds = 10) { $this->skey = $skey; $this->numRounds = $numRounds; } /** * Get a value at an arbitrary index. Mostly used for unit testing. * * @param int $i * @return int */ public function get($i) { return $this->skey[$i]; } /** * @return int */ public function getNumRounds() { return $this->numRounds; } /** * @param int $offset * @return ParagonIE_Sodium_Core_AES_Block */ public function getRoundKey($offset) { return ParagonIE_Sodium_Core_AES_Block::fromArray( array_slice($this->skey, $offset, 8) ); } /** * Return an expanded key schedule * * @return ParagonIE_Sodium_Core_AES_Expanded */ public function expand() { $exp = new ParagonIE_Sodium_Core_AES_Expanded( array_fill(0, 120, 0), $this->numRounds ); $n = ($exp->numRounds + 1) << 2; for ($u = 0, $v = 0; $u < $n; ++$u, $v += 2) { $x = $y = $this->skey[$u]; $x &= 0x55555555; $exp->skey[$v] = ($x | ($x << 1)) & ParagonIE_Sodium_Core_Util::U32_MAX; $y &= 0xAAAAAAAA; $exp->skey[$v + 1] = ($y | ($y >> 1)) & ParagonIE_Sodium_Core_Util::U32_MAX; } return $exp; } } Save