gpg from ksh script

Risc91 · 05-10-2005, 01:54 PM

I am trying to include some commands in a script to decrypt files in a specific directory. Obviously to decrypt a file you need to input the passphrase for the key. However, I don't know how to pass a passphrase to the "Enter passphrase:" prompt that is given after i call the gpg -d command.

Any suggestions?

JurgyMan · 05-10-2005, 03:02 PM

Either use a blank passphrase.... or you could use expect.
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http://www-1.ibm.com/servers/aix/pro.../download.html

Risc91 · 05-11-2005, 10:45 AM

In the event that anyone ever needs to do this I found a solution. I just echo'd the $myPass variable and piped it to GPG. For GPG to pick it up I had to use the --passphrase-fd 0 option. This basically just tells GPG to pick up the passphrase from file descriptor 0.

Code:

echo $myPass | gpg --passphrase-fd 0 -d filename.gpg

You can then go a step further and define a file for the output to be sent to, but the solution is there.