PHP实现的AES双向加密解密功能示例【128位】

程序员文章站 2023-02-16 11:31:44

本文实例讲述了php实现的aes双向加密解密功能。分享给大家供大家参考，具体如下：

<?php
/*
 * created on 2018-9-1
 *
 * to change the template for this generated file go to
 * window - preferences - phpeclipse - php - code templates
 */
 /**
 用法：
 security::encrypt($str,$key);
 security::decrypt($str,$key);
 */
 class security {
  public static function encrypt($input, $key) {
   $size = mcrypt_get_block_size(mcrypt_rijndael_128, mcrypt_mode_ecb);
   $input = security::pkcs5_pad($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, $key, $iv);
   $data = mcrypt_generic($td, $input);
   mcrypt_generic_deinit($td);
   mcrypt_module_close($td);
   $data = base64_encode($data);
   return $data;
  }
  private static function pkcs5_pad ($text, $blocksize) {
   $pad = $blocksize - (strlen($text) % $blocksize);
   return $text . str_repeat(chr($pad), $pad);
  }
  public static function decrypt($sstr, $skey) {
   $decrypted= mcrypt_decrypt(
    mcrypt_rijndael_128,
    $skey,
    base64_decode($sstr),
    mcrypt_mode_ecb
   );
   $dec_s = strlen($decrypted);
   $padding = ord($decrypted[$dec_s-1]);
   $decrypted = substr($decrypted, 0, -$padding);
   return $decrypted;
  }
 }
//用法示例：
$str = "www.jb51.net";
$key = "123456";
echo "原始字符串：".$str."<br/>";
$pwdstr = security::encrypt($str,$key);
echo "加密后：".$pwdstr."<br/>";
$destr = security::decrypt($pwdstr,$key);
echo "解密结果：".$destr;
?>

运行结果：