php openssl rsa 加密解密应用

php openssl rsa 加密解密应用

 

1、安装openssl

yum -y install openssl-devel

2、安装php openssl

到php源码包的目录 ext/openssl 下执行：

/data/apps/php/bin/phpize

./configure --with-openssl --with-php-config=/data/apps/php/bin/php-config

make

make install

(可能需要mv config0.m4 config.m4)

把生成的 openssl.so 文件添加到php.ini中

extension = /xxx/openssl.so;

可以用以下命令查看安装的模块：

php -m |grep openssl

3、生成公钥和私钥

生成私钥：

openssl genrsa 1024 > private.key

(注意，1024是密钥的长度，如果密钥较长，相应加密后的密文也会较长)

生成公钥：

openssl rsa -in private.key -pubout > public.key

 

4、利用php加密和解密文本，代码如下：

<?php

class mycrypt {

public $pubkey;
public $privkey;

function __construct() {
$this->pubkey = file_get_contents('/home/openssl/public.key');
$this->privkey = file_get_contents('/home/openssl/private.key');
}

public function encrypt($data) {
if (openssl_public_encrypt($data, $encrypted, $this->pubkey))
$data = base64_encode($encrypted);
else
throw new Exception('Unable to encrypt data. Perhaps it is bigger than the key size?');

return $data;
}

public function decrypt($data) {
if (openssl_private_decrypt(base64_decode($data), $decrypted, $this->privkey))
$data = $decrypted;
else
$data = '';

return $data;
}

}

$rsa = new mycrypt();
echo $rsa -> encrypt('abc');

//echo $rsa -> decrypt('W+ducpssNJlyp2XYE08wwokHfT0bm87yBz9vviZbfjAGsy/U9Ns9FIed684lWjYyyofi/1YWrU0Mp8vLOYi8l6CfklBY=');