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PHP加密3DES报错 Call to undefined function: mcrypt_module_open()_PHP

May 28, 2016 am 11:46 AM

我也是PHP新手,通过w3cschool了解了一下php基本原理之后就开写了。但仍是菜鸟。

先不管3DES加密的方法对不对,方法都是网上的,在运行的时候报了个错,把小弟整死了。找来找去终于自己摸出了方法。

<&#63;php
/**
* 
* PHP版3DES加解密类
*
* 可与java的3DES(DESede)加密方式兼容
*
* @Author: Luo Hui (farmer.luo at gmail.com)
*
* @version: V0.1 2008.12.04
*
*/
class Crypt3Des
{ 
public $key = "01234567890123456789012345678912";
public $iv = "23456789"; //like java: private static byte[] myIV = { 50, 51, 52, 53, 54, 55, 56, 57 };
//加密
public function encrypt($input)
{
$input = $this->padding( $input );
$key = base64_decode($this->key);
$td = mcrypt_module_open( MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');
//使用MCRYPT_3DES算法,cbc模式
mcrypt_generic_init($td, $key, $this->iv);
//初始处理
$data = mcrypt_generic($td, $input);
//加密
mcrypt_generic_deinit($td);
//结束
mcrypt_module_close($td);
$data = $this->removeBR(base64_encode($data));
return $data;
}
//解密
public function decrypt($encrypted)
{
$encrypted = base64_decode($encrypted);
$key = base64_decode($this->key);
$td = mcrypt_module_open( MCRYPT_3DES,'',MCRYPT_MODE_CBC,'');
//使用MCRYPT_3DES算法,cbc模式
mcrypt_generic_init($td, $key, $this->iv);
//初始处理
$decrypted = mdecrypt_generic($td, $encrypted);
//解密
mcrypt_generic_deinit($td);
//结束
mcrypt_module_close($td);
$decrypted = $this->removePadding($decrypted);
return $decrypted;
}
//填充密码,填充至8的倍数
public function padding( $str )
{
$len = 8 - strlen( $str ) % 8;
for ( $i = 0; $i < $len; $i++ )
{
$str .= chr( 0 );
}
return $str ;
}
//删除填充符
public function removePadding( $str )
{
$len = strlen( $str );
$newstr = "";
$str = str_split($str);
for ($i = 0; $i < $len; $i++ )
{
if ($str[$i] != chr( 0 ))
{
$newstr .= $str[$i];
}
}
return $newstr;
}
//删除回车和换行
public function removeBR( $str ) 
{
$len = strlen( $str );
$newstr = "";
$str = str_split($str);
for ($i = 0; $i < $len; $i++ )
{
if ($str[$i] != '\n' and $str[$i] != '\r')
{
$newstr .= $str[$i];
}
}
return $newstr;
}
}
//test
$input = "1qaz2ws";
echo "plainText:" . $input."<br/>";
$crypt = new Crypt3Des();
echo "Encode:".$crypt->encrypt($input)."<br/>";
echo "Decode:".$crypt->decrypt($crypt->encrypt($input));
&#63;>
Copy after login

代码可以不看,就看里面的一句:$td = mcrypt_module_open( MCRYPT_3DES, '', MCRYPT_MODE_CBC, '');报错的就是他。

我搜寻了一大堆解决方法,正确的方法应该是(仅用于windows系统哦):

当运行php的服务器端缺少libmcrypt.dll时使用函数mcrypt_module_open进行解密会出现此错误。

在服务器上做如下设置可解决。

到网上下载一个php的mcrypt模块安装包,只需要libmcrypt.dll文件即可(一般官网上下载的,php目录下已经有的)

1.将libmcrypt.dll复制到system32目录或php安装目录下的extensions目录下

2.将libmcrypt.dll复制到apache安装目录的bin目录下

3.到windows目录下找到php.ini文件,打开它

4.找到; Directory in which the loadable extensions (modules) reside.
extension_dir = "./" 如:extension_dir = "D:\php5\ext"

这两行,要使extension_dir指向的目录下能找到libmcrypt.dll,或系统path下有libmcrypt.dll

5.找到;Windows Extensions 项下面的;extension=php_mcrypt.dll这一行和;extension=php_iconv.dll(我的没有,省略了)这两行,去掉前面的分号

ps:刚开始看网上的解决方法,有的说修改php安装目录下的php.ini,但是修改后是没用的。一定要修改windows目录下的php.ini!

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