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I'm trying to set an encrypted file field's value programmatically. I'm using Encrypted Files module. I have successfully configured a file field, and it works for the contents created using the node add form.

In a custom code, I'm getting a file using the HttpClient and want to attach to a media. I could get the file, encyrpt and save it. However, if I want to open the file, it is broken.

What I'm doing is like the following:

  $client = Drupal::httpClient();

  // Get data from remote page and encrypt using the encryption profile
  $data = (string) $client->get('https://example.com/download.php?file=123')
    ->getBody();
  $encryptionProfile = Drupal::entityTypeManager()
    ->getStorage('encryption_profile')
    ->load('my_encryption_profile');
  $encryptedData = Drupal::service('encryption')
    ->encrypt($data, $encryptionProfile);

  // Create media entity and prepare destination directory
  $media = Drupal::entityTypeManager()->getStorage('media')
    ->create(['bundle' => 'my_media_type']);
  $destination = 'encrypt://my_encryption_profile/path/to/files'
  Drupal::service('file_system')
    ->prepareDirectory($destination, FileSystemInterface::CREATE_DIRECTORY);

  // Save data as file and attach to the media
  $filename = 'download.pdf';
  $file = file_save_data($encryptedData, $destination . '/' . $filename);
  $media->set('encrypted_file', ['target_id' => $file->id()]);
  $media->save();
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    The encrypt stream wrapper is a scheme wrapper which encrypts / decrypts automatically - so you're possibly doubling up by encrypting the data yourself
    – Clive
    Jan 10, 2022 at 23:38
  • I was also expecting the same, but if I use $data instead of $encryptedData like file_save_data($data, $destination . '/' . $filename), the file is saved without encryption and I can open it on the file system. Downloading the file over the stream wrapper still doesn't work. Jan 11, 2022 at 2:06
  • 1
    @Clive thanks for showing me the right direction. I was first downloading the file with the httpClient and then saving it using file_save_data. This was somehow skipping the scheme wrapper for whatever reason. That's why I was trying to encrypt it manually before saving. I changed the code and used httpClient directly to download into the destination, and it worked without manually encrypting! I'll post the detailed solution in the next days as soon as I get some time. Jan 11, 2022 at 11:11

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