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I was trying to zip a few files and password protect them. The catch here is I cannot save the file on the disk.

I tried using Rubyzip. But seems like it doesn't support file encryption.

I tried using Zipruby but it only allows Encrypting the files already on the disk. (I am not sure about this, but I could not find a way to do it in memory).

I want to Zip and Encrypt Files in memory in Ruby.

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  • ok. so what is the question? Commented Mar 6, 2013 at 15:14
  • I want to Zip and Encrypt Files in memory in Ruby. Commented Mar 6, 2013 at 15:17

1 Answer 1

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Zipruby includes facilities to do this:

zipinmem = Zip::Archive.open_buffer(buf, Zip::CREATE) do |ar| #create zip
  ar.add_buffer('bar.txt', 'baz')
end
Zip::Archive.open_buffer(zipinmem) do |ar|
  ar.add_buffer('thing.txt', "We're modifying the archive in memory!")
end

See the documentation in the fifth section.

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8 Comments

But how do I encrypt this buffer without saving ? As the files are encrypted in 4th Section in the same documentation.
@Harshac: in one of the zipruby blocks, call ar.encrypt('password').
It didn't encrypt, but didn't even raise NoMethodError !
Yes. I'm on ruby 1.8.7 & rails 3.0
From the documentation it seems like this is possible; however, in reality it does not work. When working with archive objects from "open_buffer" the "encrypt" method returns true but, in fact, does not encrypt the ZIP archive.
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