encrypt and decrypt a pdf in php with gnupg

Question

for a little security reasons I must encrypt (in php) (and decrypt later) some pdf in my server.

How can I do this? I can do it in php with gnupg?

I've try to search in internet some example but I haven't found anything

Can You help me?

you can passed protect a pdf. (no idea how secure this is). if you encrypt and decrypt on the server that also has he encryption key, your not protecting much. — , Jun 18 '14 at 21:41

score 0 · Answer 1 · answered Jun 18 '14 at 21:48

0

You can use ssh2 library with the gnupg form the command line. I think it is very powerful solution, but You have to be careful with ssh2 library:)

What OS do You prefer?

answered Jun 18 '14 at 21:48

ajtamwojtek

Thank You for your reply jakon. I've a server linux – Duccio Jun 18 '14 at 22:23

score 0 · Answer 2 · answered Jun 18 '14 at 21:55

You can use the GnuPG extension, but for a PDF file, it'd probably be easiest to just fork out to gpg(1) with exec.

Something like this might work, assuming you have the key in your GPG keychain already:

exec(escapeshellcmd("gpg -e -r " . 
                     escapeshellarg($key_id) . " " .
                     escapeshellarg($filename)));

2 Answers2