Definition and usage example of AES Encryption Class implemented by php, aes example

Definition and usage example of AES Encryption Class implemented by php, aes example

This example describes the definition and usage of AES encryption implemented by php. We will share this with you for your reference. The details are as follows:

CryptAES. class. php file:

<?phpclass CryptAES{ protected $cipher = MCRYPT_RIJNDAEL_128; protected $mode = MCRYPT_MODE_ECB; protected $pad_method = NULL; protected $secret_key = ''; protected $iv = ''; public function set_cipher($cipher) { $this->cipher = $cipher; } public function set_mode($mode) { $this->mode = $mode; } public function set_iv($iv) { $this->iv = $iv; } public function set_key($key) { $this->secret_key = $key; } public function require_pkcs5() { $this->pad_method = 'pkcs5'; } protected function pad_or_unpad($str, $ext) { if ( is_null($this->pad_method) ) {  return $str; } else {  $func_name = __CLASS__ . '::' . $this->pad_method . '_' . $ext . 'pad';  if ( is_callable($func_name) )  {  $size = mcrypt_get_block_size($this->cipher, $this->mode);  return call_user_func($func_name, $str, $size);  } } return $str; } protected function pad($str) { return $this->pad_or_unpad($str, ''); } protected function unpad($str) { return $this->pad_or_unpad($str, 'un'); } public function encrypt($str) { $str = $this->pad($str); $td = mcrypt_module_open($this->cipher, '', $this->mode, ''); if ( empty($this->iv) ) {  $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND); } else {  $iv = $this->iv; } mcrypt_generic_init($td, $this->secret_key, $iv); $cyper_text = mcrypt_generic($td, $str); //$rt=base64_encode($cyper_text); $rt = bin2hex($cyper_text); mcrypt_generic_deinit($td); mcrypt_module_close($td); return $rt; } public function decrypt($str){ $td = mcrypt_module_open($this->cipher, '', $this->mode, ''); if ( empty($this->iv) ) {  $iv = @mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND); } else {  $iv = $this->iv; } mcrypt_generic_init($td, $this->secret_key, $iv); $decrypted_text = mdecrypt_generic($td, self::hex2bin($str)); //$decrypted_text = mdecrypt_generic($td, base64_decode($str)); $rt = $decrypted_text; mcrypt_generic_deinit($td); mcrypt_module_close($td); return $this->unpad($rt); } public static function hex2bin($hexdata) { $bindata = ''; $length = strlen($hexdata); for ($i=0; $i < $length; $i += 2) {  $bindata .= chr(hexdec(substr($hexdata, $i, 2))); } return $bindata; } public static function pkcs5_pad($text, $blocksize) { $pad = $blocksize - (strlen($text) % $blocksize); return $text . str_repeat(chr($pad), $pad); } public static function pkcs5_unpad($text) { $pad = ord($text{strlen($text) - 1}); if ($pad > strlen($text)) return false; if (strspn($text, chr($pad), strlen($text) - $pad) != $pad) return false; return substr($text, 0, -1 * $pad); }}?>

Usage:

require_once("CryptAES.class.php");$keyStr = 'ss4fs4skfhksk';$aes = new CryptAES();$keyStr = $aes->hex2bin($keyStr);$aes->set_key($keyStr);$aes->require_pkcs5();$d = $aes->encrypt($data);

Note:You need to enable this function in php. ini:extension=php_mcrypt.dll

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Online text encryption and decryption tools (including AES, DES, and RC4 ):
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Online sha1/shaloud/sha256/sha384/sha512 encryption tool:
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