php实现的AES加密类定义与用法示例
发布:smiling 来源: PHP粉丝网 添加日期:2021-09-01 15:15:41 浏览: 评论:0
这篇文章主要介绍了php实现的AES加密类定义与用法,结合完整实例形式分析了基于php的AES加密类实现及使用方法,需要的朋友可以参考下。
本文实例讲述了php实现的AES加密类定义与用法,分享给大家供大家参考,具体如下:
CryptAES.class.php文件:
- <?php
- class 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, '', $this->mode, '');
- if ( emptyempty($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, '', $this->mode, '');
- if ( emptyempty($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);
- }
- }
- ?>
用法:
- 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);
注:这里需要在php.ini中开启:extension=php_mcrypt.dll
Tags: AES加密类
- 上一篇:php 判断IP为有效IP地址的方法
- 下一篇:PHP 记录访客的浏览信息方法
推荐文章
热门文章
最新评论文章
- 写给考虑创业的年轻程序员(10)
- PHP新手上路(一)(7)
- 惹恼程序员的十件事(5)
- PHP邮件发送例子,已测试成功(5)
- 致初学者:PHP比ASP优秀的七个理由(4)
- PHP会被淘汰吗?(4)
- PHP新手上路(四)(4)
- 如何去学习PHP?(2)
- 简单入门级php分页代码(2)
- php中邮箱email 电话等格式的验证(2)