How to create password protected archive file in PHP?

问题

I need to be able to create an archive(zip) file with password protection using PHP. I am using Laravel 5.4 and PHP 7.1 version. I looked at this link here for ZipArchive class documentation in PHP. I also looked at here for setPassword function. But appears that creation of password protected archives is not supported. It will be a massive surprise for me if it is not possible to create password protected archive in a mature programming language such as PHP 7.1.

So I guess I must be missing something. Can someone point me to the right direction? E.g. a sample example or open source third party library or extension to achieve this will be greatly appreciated.

回答1:

Easy peasy lemon squeezy (no).
Yes, creation of password protected archives is not supported (they will be created simply as non-protected archives, as you just described).
But, still it can be used to extract password protected archives.

Returning to the problem.
You always can just

<?php echo system('zip -P pass file.zip file.txt'); ?>

(this will work both on Windows and our beloved Linux)

But, if it not fits into your requirements, let's continue.
I would suggest you to use DotNetZip (Windows only), you will exactly dynamically generate AES-encrypted zip archives from PHP.

<?php
// origin: https://stackoverflow.com/a/670804/3684575
try
{
  $fname = "zip-generated-from-php-" . date('Y-m-d-His') . ".zip";
  $zipOutput = "c:\\temp\\" . $fname;
  $zipfact = new COM("Ionic.Zip.ZipFile");
  $zip->Name = $zipOutput;
  $dirToZip= "c:\\temp\\psh";
  # Encryption:  3 => 256-bit AES.  
  #     2 => 128-bit AES.  
  #     1 => PKZIP (Weak).  
  #     0 => None
  $zip->Encryption = 3;
  $zip->Password = "AES-Encryption-Is-Secure";
  $zip->AddDirectory($dirToZip);
  $zip->Save();
  $zip->Dispose();

  if (file_exists($zipOutput))
  {
    header('Cache-Control: no-cache, must-revalidate');
    header('Content-Type: application/x-zip'); 
    header('Content-Disposition: attachment; filename=' . $fname);
    header('Content-Length: ' . filesize($zipOutput));
    readfile($zipOutput);
    unlink($zipOutput);
  }
  else 
  {
    echo '<html>';
    echo '  <head>';
    echo '  <title>Calling DotNetZip from PHP through COM</title>';
    echo '  <link rel="stylesheet" href="basic.css"/>';
    echo '  </head>';
    echo '<body>';
    echo '<h2>Whoops!</h2>' . "<br/>\n";
    echo '<p>The file was not successfully generated.</p>';
    echo '</body>';
    echo '</html>';
  } 
}
catch (Exception $e) 
{
    echo '<html>';
    echo '  <head>';
    echo '  <title>Calling DotNetZip from PHP through COM</title>';
    echo '  <link rel="stylesheet" href="basic.css"/>';
    echo '  </head>';
    echo '<body>';
    echo '<h2>Whoops!</h2>' . "<br/>\n";
    echo '<p>The file was not successfully generated.</p>';
    echo '<p>Caught exception: ',  $e->getMessage(), '</p>', "\n";
    echo '<pre>';
    echo $e->getTraceAsString(), "\n";
    echo '</pre>';
    echo '</body>';
    echo '</html>';
}

?>

But still, this is very dirty solution and more of that, not works on Linux.

So, although PHP is a mature language, there is no adequate method (excluding custom extension or something like that) to achieve such a simple task with pure PHP.
What you also can do, is to wait until PHP 7.2 will be available for production (cuz ZipArchive::setEncryptionName is implemented (thanks to Pierre and Remi)).
But, until then you also can try to port php_zip >= 1.14.0 to PHP < 7.2, but there is currently no compiled binaries available, so you have to compile it yourself and try if it is possible at all (I believe it is).
p.s. I would try it, but have no VS2015+ on my PC right now.

来源：https://stackoverflow.com/questions/45200047/how-to-create-password-protected-archive-file-in-php

标签

php

laravel-5.3

php-7.1