public function PHPExcel_Reader_Excel5_RC4::RC4 in Loft Data Grids 7.2

Same name and namespace in other branches

1. 6.2 vendor/phpoffice/phpexcel/Classes/PHPExcel/Reader/Excel5/RC4.php \PHPExcel_Reader_Excel5_RC4::RC4()

* Symmetric decryption/encryption function * *

Parameters

string $data Data to encrypt/decrypt: * * @return string

File

vendor/phpoffice/phpexcel/Classes/PHPExcel/Reader/Excel5/RC4.php, line 72

Class

PHPExcel_Reader_Excel5_RC4

PHPExcel_Reader_Excel5_RC4

Code

public function RC4($data) {
  $len = strlen($data);
  for ($c = 0; $c < $len; $c++) {
    $this->i = ($this->i + 1) % 256;
    $this->j = ($this->j + $this->s[$this->i]) % 256;
    $t = $this->s[$this->i];
    $this->s[$this->i] = $this->s[$this->j];
    $this->s[$this->j] = $t;
    $t = ($this->s[$this->i] + $this->s[$this->j]) % 256;
    $data[$c] = chr(ord($data[$c]) ^ $this->s[$t]);
  }
  return $data;
}