namespace app\common\lib;
/**
* aes 加密 解密类库
* @by singwa
* Class Aes
* @package app\common\lib
*/
class Aes {
private $key = null;
/**
*
* @param $key 密钥
* @return String
*/
public function __construct() {
// 需要小伙伴在配置文件app.php中定义aeskey
$this->key = config('app.aeskey');
}
/**
* 加密
* @param String input 加密的字符串
* @param String key 解密的key
* @return HexString
*/
public function encrypt($input = '') {
$size = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_ECB);
$input = $this->pkcs5_pad($input, $size);
$td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_ECB, '');
$iv = mcrypt_create_iv(mcrypt_enc_get_iv_size($td), MCRYPT_RAND);
mcrypt_generic_init($td, $this->key, $iv);
$data = mcrypt_generic($td, $input);
mcrypt_generic_deinit($td);
mcrypt_module_close($td);
$data = base64_encode($data);
return $data;
}
/**
* 填充方式 pkcs5
* @param String text 原始字符串
* @param String blocksize 加密长度
* @return String
*/
private function pkcs5_pad($text, $blocksize) {
$pad = $blocksize - (strlen($text) % $blocksize);
return $text . str_repeat(chr($pad), $pad);
}
/**
* 解密
* @param String input 解密的字符串
* @param String key 解密的key
* @return String
*/
public function decrypt($sStr) {
$decrypted= mcrypt_decrypt(MCRYPT_RIJNDAEL_128,$this->key,base64_decode($sStr), MCRYPT_MODE_ECB);
$dec_s = strlen($decrypted);
$padding = ord($decrypted[$dec_s-1]);
$decrypted = substr($decrypted, 0, -$padding);
return $decrypted;
}
}
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