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ZIP a file and protect with a password in PHP

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一整个雨季
一整个雨季 2020-12-18 04:33

I\'m having this code to zip files but i need to protect this file with a password

$file = \'backup.sql\';
$zipname = $file.\'.zip\';
$zip = new ZipArchive;
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5条回答
  • 闹比i
    2020-12-18 05:07

    ZipArchive::setPassword This function only sets the password to be used to decompress the archive; it does not turn a non-password-protected ZipArchive into a password-protected ZipArchive.

    working code:

    $file = 'file_name_to_be_compressed.extension'

    system('zip -P ZIP_PASSWORD '.$file.'.zip '.$file);

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  • 北恋
    2020-12-18 05:11

    As it is described on the documentation:

    This function only sets the password to be used to decompress the archive; it does not turn a non-password-protected ZipArchive into a password-protected ZipArchive.

    If you want to encrypt a zip archive I'd suggest google a bit :)

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  • 滥情空心
    2020-12-18 05:15

    Yes, creation of password protected archives is not supported (they will be created simply as non-protected archives).
    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.

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  • 爱一瞬间的悲伤
    2020-12-18 05:16

    Use PHP 7.2 to create password protected zip file:

    $zip = new ZipArchive;
$res = $zip->open('filename.zip', ZipArchive::CREATE); //Add your file name
if ($res === TRUE) {
   $zip->addFromString('FILENAME_WITH_EXTENSION', 'file content goes here'); //Add your file name
   $zip->setEncryptionName('FILENAME_WITH_EXTENSION', ZipArchive::EM_AES_256, 'PASSWORD'); //Add file name and password dynamically
   $zip->close();
   echo 'ok';
} else {
   echo 'failed';
}
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  • 暖寄归人
    2020-12-18 05:18

    Since PHP 7.2 you can use setEncryptionName to create password protected ZIP archive.

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