PHP的AES加密算法完整实例

本文实例讲述了PHP的AES 加密算法。分享给大家供大家参考，具体如下：
									<?php

									class MCrypt {

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

									  private $key = 'U1MjU1M0FDOUZ.Qz'; #Same as in JAVA

									  function __construct() {

									    $this->key = hash('sha256', $this->key, true);

									    //echo $this->key.'<br/>';

									  }

									  function encrypt($str) {

									    $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');

									    mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));

									    $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);

									    $pad = $block - (strlen($str) % $block);

									    $str .= str_repeat(chr($pad), $pad);

									    $encrypted = mcrypt_generic($td, $str);

									    mcrypt_generic_deinit($td);

									    mcrypt_module_close($td);

									    return base64_encode($encrypted);

									  }

									  function decrypt($code) {

									    $td = mcrypt_module_open(MCRYPT_RIJNDAEL_128, '', MCRYPT_MODE_CBC, '');

									    mcrypt_generic_init($td, $this->key, $this->hexToStr($this->hex_iv));

									    $str = mdecrypt_generic($td, base64_decode($code));

									    $block = mcrypt_get_block_size(MCRYPT_RIJNDAEL_128, MCRYPT_MODE_CBC);

									    mcrypt_generic_deinit($td);

									    mcrypt_module_close($td);

									    return $this->strippadding($str);

									  }

									  /*

									   For PKCS7 padding

									   */

									  private function addpadding($string, $blocksize = 16) {

									    $len = strlen($string);

									    $pad = $blocksize - ($len % $blocksize);

									    $string .= str_repeat(chr($pad), $pad);

									    return $string;

									  }

									  private function strippadding($string) {

									    $slast = ord(substr($string, -1));

									    $slastc = chr($slast);

									    $pcheck = substr($string, -$slast);

									    if (preg_match("/$slastc{" . $slast . "}/", $string)) {

									      $string = substr($string, 0, strlen($string) - $slast);

									      return $string;

									    } else {

									      return false;

									    }

									  }

									  function hexToStr($hex)

									  {

									    $string='';

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

									    {

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

									    }

									    return $string;

									  }

									}

									$encryption = new MCrypt();

									echo $encryption->encrypt('123456') . "<br/>";

									echo $encryption->decrypt('tpyxISJ83dqEs3uw8bN/+w==');

									?>
希望本文所述对大家PHP程序设计有所帮助。
PHP的AES加密算法完整实例

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