On Sun, Nov 01, 2015 at 10:07:57AM +0100, Thomas Meyer wrote:
Hi, would it be possible to call something like this before uploading a file to google drive? $ openssl enc -e -bf -pass file:/path/to/pass.txt -in "$f" -out "$f" and when download the file from google drive: $ openssl enc -d -bf -pass file:/path/to/pass.txt -in "$f" -out "$f" how would I implement something like this?
I can't really think of simple way of doing this at the VFS layer (you may be able to configure certain apps to do the equivalent for you). If you want to get your hands dirty, you can implement it in daemon/gvfsbackendgoogle.c. You'd probably need to update these functions for reading: g_vfs_backend_google_open_for_read g_vfs_backend_google_read And these for writing: g_vfs_backend_google_create g_vfs_backend_google_replace g_vfs_backend_google_write g_vfs_backend_google_push It would probably be easiest to use something like libgcrypt to do the symmetric encryption. The trickiest bit would be dealing with streaming the data correctly when reading and writing because gvfs does not only deal with whole files. It may be easiest (at least initially) to make it so that the incoming data is buffered to a file, then encrypted and then written entirely upon close. And for reading, read and decrypt the entire file on open. Hope that helps, -- Ross Lagerwall
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