讲解如何在laravel中自定义加密服务

前言

本文介绍的是laravel 5.3中自定义加密服务的方案，利用laravel的服务容器，实现自定义加密服务注册(示例是支持长字符串的RSA加密)，下面来看看详细的介绍：

创建加密解密服务类

文件地址 /app/Service/Common/CryptService.php 代码如下

下面这个是个人写的支持长字符串的RSA加密类作为示例，自定义加密的话只需更改这个文件的代码就好，其它操作只是为了实现依赖注入。

<?php
namespace App\Service\Common;
class CryptService
{
 public $config,$keypath, $prikey_path, $pubkey_path, $prikey, $pubkey , $private_key_size;

 public function select($select = 'rsa_api')
 {
  $config = config('crypt');
  if (array_key_exists($select, $config)) {
   $this->config = $config[$select];
   $this->private_key_size = $this->config['openssl_config']['private_key_bits'];
  } else {
   return false;
  }
  $this->keypath = dirname(dirname(dirname(__DIR__))) . $this->config['path'];
  if(!file_exists($this->keypath)){
   mkdir($this->keypath,"0777",true);
  }
  $this->prikey_path = $this->keypath . $this->config['private_key_file_name'];
  $this->pubkey_path = $this->keypath . $this->config['public_key_file_name'];
  if (file_exists($this->prikey_path))
   $this->prikey = file_get_contents($this->prikey_path);
  if (file_exists($this->pubkey_path))
   $this->pubkey = file_get_contents($this->pubkey_path);
  return $this;
 }

 public function makeKey()
 {
  $res = openssl_pkey_new($this->config['openssl_config']);
  openssl_pkey_export($res, $this->prikey);
  file_put_contents($this->prikey_path, $this->prikey);
  $pubkey = openssl_pkey_get_details($res);
  $this->pubkey = $pubkey['key'];
  file_put_contents($this->pubkey_path, $this->pubkey);
  return $test = ['prikey' => $this->prikey, 'pubkey' => $this->pubkey];
 }

 public function encryptPrivate($data){
  $crypt = $this->encrypt_split($data);
  $crypted = '';
  foreach ($crypt as $k=>$c){
   if($k!=0) $crypted.="@";
   $crypted.=base64_encode($this->doEncryptPrivate($c));
  }
  return $crypted;
 }
 public function encryptPublic($data){
  $crypt = $this->encrypt_split($data);
  $crypted = '';
  foreach ($crypt as $k=>$c){
   if($k!=0) $crypted.="@";
   $crypted.=base64_encode($this->doEncryptPublic($c));
  }
  return $crypted;
 }

 public function decryptPublic($data){
  $decrypt = explode('@',$data);
  $decrypted = "";
  foreach ($decrypt as $k=>$d){
   $decrypted .= $this->doDecryptPublic(base64_decode($d));
  }
  return $decrypted;
 }
 public function decryptPrivate($data){
  $decrypt = explode('@',$data);
  $decrypted = "";
  foreach ($decrypt as $k=>$d){
   $decrypted .= $this->doDecryptPrivate(base64_decode($d));
  }
  return $decrypted;
 }
 private function encrypt_split($data){
  $crypt=[];$index=0;
  for($i=0; $i<strlen($data); $i+=117){
   $src = substr($data, $i, 117);
   $crypt[$index] = $src;
   $index++;
  }
  return $crypt;
 }
 private function doEncryptPrivate($data)
 {
  $rs = '';
  if (@openssl_private_encrypt($data, $rs, $this->prikey) === FALSE) {
   return NULL;
  }
  return $rs;
 }

 private function doDecryptPrivate($data)
 {
  $rs = '';
  if (@openssl_private_decrypt($data, $rs, $this->prikey) === FALSE) {
   return null;
  }
  return $rs;
 }
 private function doEncryptPublic($data){
  $rs = '';
  if (@openssl_public_encrypt($data, $rs, $this->pubkey) === FALSE) {
   return NULL;
  }
  return $rs;
 }
 private function doDecryptPublic($data)
 {
  $rs = '';
  if (@openssl_public_decrypt($data, $rs, $this->pubkey) === FALSE) {
   return null;
  }
  return $rs;
 }
}

创建门面facades

文件地址 /app/Facades/CryptFacades.php 代码如下：

<?php
namespace App\Facades;
use \Illuminate\Support\Facades\Facade;

class CryptFacades extends Facade{
 public static function getFacadeAccessor()
 {
  return 'MyCrypt';
 }
}

注册服务

创建文件 /app/Providers/MyCryptServiceProvider.php 代码如下:

其实也可以在AppServiceProvider中注册，就不用另外建个MyCryptServiceProvider.php文件了

而且在/config/app.php中一般也已经有了AppServiceProvider的声明

<?php
namespace App\Providers;

use App\Service\Common\CryptService;
use Illuminate\Support\ServiceProvider;

class MyCryptServiceProvider extends ServiceProvider
{
 /**
  * Bootstrap the application services.
  *
  * @return void
  */
 public function boot()
 {
  //
 }

 /**
  * Register the application services.
  *
  * @return void
  */
 public function register()
 {
  \App::bind('MyCrypt',CryptService::class);
 }
}

在配置中声明

文件地址 /config/app.php 在providershe和aliases中添加

'providers' => [
 \App\Providers\MyCryptServiceProvider::class,
],

'aliases' => [
 'MyCrypt' => \App\Facades\CryptFacades::class,
]

编写自定义加密解密服务的配置文件

/config/crypt.php 因为我写的CryptService有用到配置文件，所以需要再添加个配置文件。在实际项目中，可以根据需要自行设置配置文件和加密服务类。

<?php
//基于laravel根目录，分隔符最好是用 DIRECTORY_SEPARATOR 常量代替
return [
 'rsa_api' => [
  'path'=>DIRECTORY_SEPARATOR.'storage'.DIRECTORY_SEPARATOR.'rsakey'.DIRECTORY_SEPARATOR,
  'private_key_file_name'=>'private_key.pem',
  'public_key_file_name' =>'public_key.pem',
  'openssl_config'=>[
   "digest_alg" => "sha512",
   "private_key_bits" => 1024,
   "private_key_type" => OPENSSL_KEYTYPE_RSA,
  ]
 ],
 'rsa_data'=>[
  'path'=>DIRECTORY_SEPARATOR.'storage'.DIRECTORY_SEPARATOR.'rsakey'.DIRECTORY_SEPARATOR,
  'private_key_file_name'=>'private.pem',
  'public_key_file_name' =>'public.pem',
  'openssl_config'=>[
   "digest_alg" => "sha512",
   "private_key_bits" => 1024,
   "private_key_type" => OPENSSL_KEYTYPE_RSA,
  ]
 ]
];

在Controller中使用的示例

1、artisan创建Controller文件

php artisan make:controller IndexController

2、编辑IndexController

<?php
namespace App\Http\Controllers;

use Illuminate\Http\Request;
use MyCrypt;
class IndexController extends Controller{

 public function test(){
  $crypt = MyCrypt::select('rsa_api');
  $crypt->makeKey();
  $short = "abcd";
  $long = "
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
   aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa";

  $req['short'] = $short;
  $req['short_private_encrypt'] = $crypt->encryptPrivate($short);
  $req['short_public_decrypt'] = $crypt->decryptPublic($req['short_private_encrypt']);

  $req['long'] = $long;
  $req['long_private_encrypt'] = $crypt->encryptPrivate($long);
  $req['long_public_decrypt'] = $crypt->decryptPublic($req['long_private_encrypt']);
  dump($req);
  //dd($req);
 }
}

3、在/routes/web.php添加路由

Route::get('/test', 'IndexController@test');

4、浏览器访问验证结果

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