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类的基础用法

2020-09-01 11:07:37  来源:admin 点击:487

//AES-CBC加减密类  ,类中静态static方法不能使用私有变量

class Aes {


    private $hex_iv = '00000000000000000000000000000000'; # converted C byte code in to HEX and placed it here


    private $key = '3sffeexxfgas'; #Same as in C

    //不是静态类方法,所以可以使用$this->key

    public function encrypt($input)

    {

        $data = openssl_encrypt($input, 'AES-128-CBC', $this->key, OPENSSL_RAW_DATA, $this->hexToStr($this->hex_iv));

        $data = base64_encode($data);

        return $data;

    }


    public function decrypt($input)

    {

        $decrypted = openssl_decrypt(base64_decode($input), 'AES-128-CBC', $this->key, OPENSSL_RAW_DATA, $this->hexToStr($this->hex_iv));

        return $decrypted;

    }


    function hexToStr($hex)

    {

        $string='';

        for ($i=0; $i < strlen($hex)-1; $i+=2)

        {

            $string .= chr(hexdec($hex[$i].$hex[$i+1]));

        }

        return $string;

    }

}

$pwd = new Aes();

echo $pwd->encrypt('asdasd');

echo '<hr/>';

echo $pwd->decrypt('93m8CEacf+p9XRh/j8pKlQ==');

//AES-ECB加减密类  ,类中静态static方法不能使用私有变量

class Aes

{

  

  public static function encrypt($string, $key)

  {

    // openssl_encrypt 加密不同Mcrypt,对秘钥长度要求,超出16加密结果不变

    $data = openssl_encrypt($string, 'AES-128-ECB', $key, OPENSSL_RAW_DATA);

    return base64_encode($data);

  }

  

  public static function decrypt($string, $key)

  {

    return openssl_decrypt(base64_decode($string), 'AES-128-ECB', $key, OPENSSL_RAW_DATA);

  }

}

$pwd = new Aes();

echo $pwd->encrypt('asdasd','397e2e');

echo '<hr/>';

echo $pwd->decrypt('sn5B2HOXgkZPufr01BvG3A==','397e2e');

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