Restructure to be purely ZipArchive-based (#17)

* Restructure to be purely ZipArchive-based

* Remove non-required RDONLY-mode in testing

* Update scrutinizer.yml

* Update readme

* Another scrutinizer-update

* Fix spacing-issue

Author: olssonm

.scrutinizer.yml

@@ -1,6 +1,15 @@
 filter:
     excluded_paths: [tests/*]
 
+build:
+    environment:
+        php:
+          version: 7.4
+
+          # see https://pecl.php.net/
+          pecl_extensions:
+            - zip
+
 checks:
     php:
         remove_extra_empty_lines: true

.travis.yml

@@ -13,12 +13,6 @@ script:
 
 jobs:
   include:
-    - php: 7.2.24
-      env:
-        - ILLUMINATE_VERSION=7.0.*
-    - php: 7.2.24
-      env:
-        - ILLUMINATE_VERSION=^6.0
     - php: 7.3
       env:
         - ILLUMINATE_VERSION=^6.0
@@ -34,3 +28,9 @@ jobs:
     - php: 7.4
       env:
         - ILLUMINATE_VERSION=^8.0
+    - php: 8.0
+      env:
+        - ILLUMINATE_VERSION=^7.0
+    - php: 8.0
+      env:
+        - ILLUMINATE_VERSION=^8.0

README.md

@@ -15,14 +15,20 @@ Backup Shield simply listens for when the .zip-file generated by Laravel-backup
 
 *Using older versions of Laravel? Check out the [v1 branch](https://github.com/olssonm/laravel-backup-shield/tree/v1) (for Laravel 5.2) and the [v2 branch](https://github.com/olssonm/laravel-backup-shield/tree/v2).*
 
+## Requirements
+
+`php: 7.3|^8.0`  
+`ext-zip: ^1.14`  
+`laravel: ^6|^7|^8`
+
+An appropriate zip-extension should be come with your PHP-install since PHP 7.2. If you for some reason don't have it installed – and don't want to install/upgrade it – look a versions prior to v3.4 of this package.
+
 ## Installation
 
 ```bash
 composer require olssonm/laravel-backup-shield
 ```
 
-Please note that `spatie/laravel-backup: "^6"` and `laravel/framework: "^6.0|^7.0"` requires PHP 7.2.
-
 ## Configuration
 
 Publish your configuration using `php artisan vendor:publish` and select `BackupShieldServiceProvider`. Or directly via ```php artisan vendor:publish --provider="Olssonm\BackupShield\BackupShieldServiceProvider"```.
@@ -47,22 +53,14 @@ Set to `NULL` if you want to keep your backup without a password.
 
 Set your type of encryption. Available options are:
 
-`\Olssonm\BackupShield\Encryption::ENCRYPTION_DEFAULT` (PHP < 7.2: PKWARE/ZipCrypto, PHP >= 7.2: AES 128)  
+`\Olssonm\BackupShield\Encryption::ENCRYPTION_DEFAULT` (AES 128)  
 `\Olssonm\BackupShield\Encryption::ENCRYPTION_WINZIP_AES_128` (AES 128)  
 `\Olssonm\BackupShield\Encryption::ENCRYPTION_WINZIP_AES_192` (AES 192)  
 `\Olssonm\BackupShield\Encryption::ENCRYPTION_WINZIP_AES_256` (AES 256)  
 
-**Important information regarding encryption**
-
-Using the `ENCRYPTION_DEFAULT` (PKWARE/ZipCrypto) crypto gives you the best portability as most operating systems can natively unzip the file – however, ZipCrypto might be weak. The Winzip AES-methods on the other hand might require a separate app and/or licence to be able to unzip depending on your OS; suggestions for macOS are [Keka](http://www.kekaosx.com/en/) and [Stuffit Expander](https://itunes.apple.com/us/app/stuffit-expander-16/id919269455).
-
-Also to note is that when zipping very large files ZipCrypto might be very inefficient as the entire data-set will have to be loaded into memory to perform the encryption, if the zipped file's content is bigger than your available RAM you *will* run out of memory.
-
-#### Differences when using PHP < 7.2 and PHP >= 7.2
-
-Since PHP 7.2 (coupled with zip-extension >= 1.14.0) PHP can natively password-protect .zip-files via the ZipArchive-methods. If these conditions are met, ZipArchive is used. Else, the package will automatically use the [nelexa/zip](https://github.com/Ne-Lexa/php-zip)-package.
+#### Regarding the layered archive
 
-The former might be less memory-intensive.
+This package adds the backup-zip created by spatie/laravel-backup inside a new password protected archive. This is to disable its contents to be able to be viewed without a password – instead only backup.zip will be displayed. Becouse, even without a password, a zip's contents (i.e. the file- and folder names) can be extracted.
 
 ## Testing
 

composer.json

@@ -18,9 +18,9 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.3|^8.0",
+        "ext-zip": "^1.14.0",
         "illuminate/support": "^6.0|^7.0|^8.0",
-        "nelexa/zip": "3.3",
         "spatie/laravel-backup": "~6.0"
     },
     "require-dev": {

src/BackupShieldServiceProvider.php

@@ -5,9 +5,6 @@
 use Illuminate\Foundation\Support\Providers\EventServiceProvider as ServiceProvider;
 use Illuminate\Support\Facades\Event;
 
-use Olssonm\BackupShield\Factories\Password;
-use Olssonm\BackupShield\Encryption;
-
 use Spatie\Backup\Events\BackupZipWasCreated;
 use Olssonm\BackupShield\Listeners\PasswordProtectZip;
 
@@ -61,10 +58,6 @@ public function boot() : void
      */
     public function register() : void
     {
-        $this->app->singleton('Olssonm\BackupShield\Encryption', function ($app) {
-            return new \Olssonm\BackupShield\Encryption;
-        });
-
         $this->mergeConfigFrom(
             $this->config, 'backup-shield'
         );

src/Encryption.php

@@ -2,9 +2,7 @@
 
 namespace Olssonm\BackupShield;
 
-use PhpZip\ZipFile;
-
-use \ZipArchive;
+use ZipArchive;
 
 class Encryption
 {
@@ -13,69 +11,26 @@ class Encryption
      *
      * @var string
      */
-    const ENCRYPTION_DEFAULT = 'default';
+    const ENCRYPTION_DEFAULT = ZipArchive::EM_AES_128;
 
     /**
      * AES-128 encryption contants
      *
      * @var string
      */
-    const ENCRYPTION_WINZIP_AES_128 = 'aes_128';
+    const ENCRYPTION_WINZIP_AES_128 = ZipArchive::EM_AES_128;
 
     /**
      * AES-192 encryption contants
      *
      * @var string
      */
-    const ENCRYPTION_WINZIP_AES_192 = 'aes_192';
+    const ENCRYPTION_WINZIP_AES_192 = ZipArchive::EM_AES_192;
 
     /**
      * AES-256 encryption contants
      *
      * @var string
      */
-    const ENCRYPTION_WINZIP_AES_256 = 'aes_256';
-
-    /**
-     * ZipArchive encryption constants; stores as simple string for PHP < 7.2
-     * backwards compatability
-     *
-     * @var array
-     */
-    private $zipArchiveOptions = [
-        self::ENCRYPTION_DEFAULT => '257',
-        self::ENCRYPTION_WINZIP_AES_128 => '257',
-        self::ENCRYPTION_WINZIP_AES_192 => '258',
-        self::ENCRYPTION_WINZIP_AES_256 => '259',
-    ];
-
-    /**
-     * ZipFile encryption constants
-     *
-     * @var array
-     */
-    private $zipFileOptions = [
-        self::ENCRYPTION_DEFAULT => \PhpZip\Constants\ZipEncryptionMethod::PKWARE,
-        self::ENCRYPTION_WINZIP_AES_128 => \PhpZip\Constants\ZipEncryptionMethod::WINZIP_AES_128,
-        self::ENCRYPTION_WINZIP_AES_192 => \PhpZip\Constants\ZipEncryptionMethod::WINZIP_AES_192,
-        self::ENCRYPTION_WINZIP_AES_256 => \PhpZip\Constants\ZipEncryptionMethod::WINZIP_AES_256,
-    ];
-
-    /**
-     * Retrive appropriate encryption constant
-     *
-     * @param  string $type
-     * @param  string $engine
-     * @return mixed
-     */
-    public function getEncryptionConstant($type, $engine)
-    {
-        if ($engine == 'ZipArchive' && isset($this->zipArchiveOptions[$type])) {
-            return $this->zipArchiveOptions[$type];
-        } elseif ($engine == 'ZipFile' && isset($this->zipFileOptions[$type])) {
-            return $this->zipFileOptions[$type];
-        } else {
-            throw new \Exception("Encryption key not set or invalid value", 1);
-        }
-    }
+    const ENCRYPTION_WINZIP_AES_256 = ZipArchive::EM_AES_256;
 }

src/Factories/Password.php

@@ -4,8 +4,7 @@
 
 use Illuminate\Support\Collection;
 use Olssonm\BackupShield\Encryption;
-use PhpZip\ZipFile;
-use PhpZip\Constants\ZipCompressionMethod;
+
 use \ZipArchive;
 
 class Password
@@ -27,77 +26,43 @@ class Password
     /**
      * Read the .zip, apply password and encryption, then rewrite the file
      *
-     * @param Encryption $encryption
      * @param string     $path
      */
-    function __construct(Encryption $encryption, string $path)
+    function __construct(string $path)
     {
         $this->password = config('backup-shield.password');
 
-        if (!$this->password) {
+        // If no password is set, just return the backup-path
+        if (!$this->password) { 
             return $this->path = $path;
         }
 
-        // If ZipArchive is enabled
-        if (class_exists('ZipArchive') && in_array('setEncryptionIndex', get_class_methods('ZipArchive'))) {
-            consoleOutput()->info('Applying password and encryption to zip using ZipArchive...');
-            $this->makeZipArchive($encryption, $path);
-        }
-
-        // Fall back on PHP-driven ZipFile
-        else {
-            consoleOutput()->info('Applying password and encryption to zip using ZipFile...');
-            $this->makeZipFile($encryption, $path);
-        }
+        consoleOutput()->info('Applying password and encryption to zip using ZipArchive...');
+        
+        $this->makeZip($path);
 
         consoleOutput()->info('Successfully applied password and encryption to zip.');
     }
 
     /**
      * Use native PHP ZipArchive
      *
-     * @param   Encryption $encryption
      * @return  void
      */
-    protected function makeZipArchive(Encryption $encryption, string $path) : void
+    protected function makeZip(string $path): void
     {
-        $encryptionConstant = $encryption->getEncryptionConstant(
-            config('backup-shield.encryption'),
-            'ZipArchive'
-        );
+        $encryption = config('backup-shield.encryption');
 
         $zipArchive = new ZipArchive;
 
         $zipArchive->open($path, ZipArchive::OVERWRITE);
         $zipArchive->addFile($path, 'backup.zip');
         $zipArchive->setPassword($this->password);
-        Collection::times($zipArchive->numFiles, function ($i) use ($zipArchive, $encryptionConstant) {
-            $zipArchive->setEncryptionIndex($i - 1, $encryptionConstant);
+        Collection::times($zipArchive->numFiles, function($i) use ($zipArchive, $encryption) {
+            $zipArchive->setEncryptionIndex($i - 1, $encryption);
         });
         $zipArchive->close();
 
         $this->path = $path;
     }
-
-    /**
-     * Use PhpZip\ZipFile-package to create the zip
-     *
-     * @param   Encryption $encryption
-     * @return  void
-     */
-    protected function makeZipFile(Encryption $encryption, string $path) : void
-    {
-        $encryptionConstant = $encryption->getEncryptionConstant(
-            config('backup-shield.encryption'),
-            'ZipFile'
-        );
-
-        $zipFile = new ZipFile();
-        $zipFile->addFile($path, 'backup.zip', ZipCompressionMethod::DEFLATED);
-        $zipFile->setPassword($this->password, $encryptionConstant);
-        $zipFile->saveAsFile($path);
-        $zipFile->close();
-
-        $this->path = $path;
-    }
 }

src/Listeners/PasswordProtectZip.php

@@ -26,6 +26,6 @@ public function __construct()
      */
     public function handle(BackupZipWasCreated $event) : string
     {
-        return (new Password(new \Olssonm\BackupShield\Encryption, $event->pathToZip))->path;
+        return (new Password($event->pathToZip))->path;
     }
 }

src/config/backup-shield.php

@@ -5,7 +5,7 @@
         'encryption' => \Olssonm\BackupShield\Encryption::ENCRYPTION_DEFAULT
 
         // Available encryption methods:
-        // \Olssonm\BackupShield\Encryption::ENCRYPTION_DEFAULT (PHP < 7.2: PKWARE/ZipCrypto, PHP >= 7.2: AES 128)
+        // \Olssonm\BackupShield\Encryption::ENCRYPTION_DEFAULT (AES 128)
         // \Olssonm\BackupShield\Encryption::ENCRYPTION_WINZIP_AES_128 (AES 128)
         // \Olssonm\BackupShield\Encryption::ENCRYPTION_WINZIP_AES_192 (AES 192)
         // \Olssonm\BackupShield\Encryption::ENCRYPTION_WINZIP_AES_256 (AES 256)