Summary of the use of Mcrypt for PHP security processing:
We know that when writing code programs, in addition to ensuring the high performance of the code, there is another very important thing, which is the security of the data. For php, it provides several methods for encrypting data, but they are still limited. They are lacking in meeting special data encryption and decryption. Therefore, the third-party extension mcrypt library recommended here provides a wide range of types, algorithms and modes. Encryption and decryption function, then let's introduce its use below.
Description:
操作系统：CentOS 5.x 64位
已安装php版本：php-5.4.4
已安装php路径：/usr/local/php
achieved goals:
Without affecting website access, recompile php and add support for mcrypt extension
Specific operation:
1. Download the software package
1. Download php (the version must be the same as the one installed by the system)
http://museum.php.net/php5/php-5.4.4.tar.gz
2. Download libmcrypt (this package is required to install mcrypt)
http://nchc.dl.sourceforge.net/project/mcrypt/Libmcrypt/2.5.8/libmcrypt-2.5.8.tar.gz
3. Download mhash (this package is required to install mcrypt)
https://acelnmp.googlecode.com/files/mhash-0.9.9.9.tar.gz
4. Download mcrypt
https://lcmp.googlecode.com/files/mcrypt-2.6.8.tar.gz
After downloading the above packages, upload them to the /usr/local/src directory
Second, install the software package
1. Install libmcrypt
cd /usr/local/src #进入软件包存放目录
tar zxvf libmcrypt-2.5.8.tar.gz #解压
cd libmcrypt-2.5.8 #进入安装目录
./configure #配置
make #编译
make install #安装
2. Install mhash
cd /usr/local/src
tar zxvf mhash-0.9.9.9.tar.gz
cd mhash-0.9.9.9
./configure
make
make install
3. Install mcrypt
cd /usr/local/src
tar zxvf mcrypt-2.6.8.tar.gz
cd mcrypt-2.6.8
ln -s /usr/local/bin/libmcrypt_config /usr/bin/libmcrypt_config #添加软连接
export LD_LIBRARY_PATH=/usr/local/lib:$LD_LIBRARY_PATH #添加环境变量
./configure
make
make install
Three, recompile php
1. Check the PHP compilation parameters installed before the system
System operation and maintenance www.osyunwei.com Warm reminder: qihang01 original content copyright, reprint please indicate the source and the original link
/usr/local/php/bin/php -i |grep configure #View php compilation parameters, record the compilation parameters, which will be used later
2. Install php
cd /usr/local/src
tar zxvf php-5.4.4.tar.gz
cd php-5.4.4
‘./configure’ ‘–prefix=/usr/local/php’ ‘–enable-mbstring=all’ ‘–with-config-file-path=/usr/local/php/etc’ ‘–with-zlib’ ‘–with-mysql=/usr/local/mysql-5.1.38/’ ‘–with-gd’ ‘–with-mysqli=/usr/local/mysql-5.1.38/bin/mysql_config’ ‘–with-jpeg-dir=/usr’ ‘–with-png-dir=/usr’ ‘–enable-fpm’ ‘–enable-soap’ ‘–with-freetype-dir=/usr/lib64’ ‘–with-iconv=/usr/local’ ‘–with-curl’ ‘–with-mcrypt’
#Add'--with-mcrypt' after the previous compilation parameters and press Enter
make #编译
make install #安装
/usr/local/src/php-5.4.4/sapi/fpm/init.d.php-fpm reload #重新加载php-fpm
Fourth, test whether the mcrypt extension has been installed successfully
Create a new info.php test page in the website directory, write the following code, and save
<?php phpinfo(); ?>Open info.php in the browser and you will see the following information
The mcrypt extension has been installed successfully
At this point, the installation of the mcrypt extension for php under Linux is complete.
Extended knowledge:
Install php's mcrypt extension
Download the mcrypt extension under php or download the complete installation package of php directly
Find the php version of your server under the http://php.net/releases/index.php webpage, download it and unzip it by tar (myself is php5.3.3)
Enter the ext/mcrypt folder
[root@*_* 14:45 ~]# cd php-5.3.3/ext/mcrypt/
Execute the phpize command (phpize is used to extend the php extension module, through phpize you can create a php plug-in module, if not? It is included in yum install php53-devel, or other methods)
[root@*_* 14:48 mcrypt]# whereis phpize //为了确定phpize存在
phpize: /usr/bin/phpize /usr/share/man/man1/phpize.1.gz
[root@*_* 14:48 mcrypt]# phpize
Configuring for:
PHP Api Version: 20090626
Zend Module Api No: 20090626
Zend Extension Api No: 220090626
After the execution, you will find that there are some more configure files in the current directory, and finally execute the php-config command to basically complete
Execute the following command to make sure your /usr/bin/php-config exists
[root@*_* 15:02 mcrypt]# whereis php-config
php-config: /usr/bin/php-config /usr/share/man/man1/php-config.1.gz
[root@*_* 15:02 mcrypt]# ./configure --with-php-config=/usr/bin/php-config
If you encounter the following error, please install gcc first, command yum install gcc
configure: error: no acceptable C compiler found in $PATH
Until no error is reported, it appears: config.status: creating config.h, execute the following command
[root@*_* 15:06 mcrypt]# make && make install
At the end, you will be prompted as follows, indicating that you are done
Installing shared extensions: /usr/lib64/php/modules/
By the way, check whether the mrcypt.so extension in /usr/lib64/php/modules/ has been created successfully
Then things are simple, add an extension=mcrypt.so to your php.ini
[root@*_* 15:09 mcrypt]# cd /etc/php.d
Just create a mrcypt.ini file with extension=mcrypt.so
[root@*_* 15:17 php.d]# echo 'extension=mcrypt.so' > mcrypt.ini
(3) Restart apache, check phpinfo, is the mcrypt module extension loaded?
yum install php-mcrypt