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Елин Й. avatar Drupal

How to set an encrypted file field's value programmatically

je flag
Елин Й.

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()]);
  $media->save();
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cn flag
Clive
The `encrypt` stream wrapper is _a scheme wrapper which encrypts / decrypts automatically_ - so you're possibly doubling up by encrypting the data yourself
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Елин Й. avatar
je flag
Елин Й.
I was also expecting the same, but if I use `$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.
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Елин Й. avatar
je flag
Елин Й.
@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.
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