decrypt password in a bash script

Question

I'd like to prepare a simple script for connecting to some VPN network. The password to the network consists of two elements: pretty complicated pass + randomized token. I don't want to remember this password but store it encrypted in some secure directory. Now, the script I need should ask me for a passphrase and some token, read decrypt a pass from a file and run some commands. All those are pretty easy except one thing: is it possible to decrypt a file to a variable instead of file? I mean I'd like to get something like

PASS=`mdecrypt password.nc`

but as far as I know mdecrypt generates a file as a result instead of returning value. I know I could run something like

`mdecrypt password.nc`
PASS=`cat password`
`unlink password`

but is there some easier (one liner) solution?

nu11p01n73R · Accepted Answer · 2014-10-14 06:07:58Z

1

uset the -F option

-F Force output on standard output or input from stdin if that is a terminal. By default mcrypt will not output encrypted data to terminal

answered Oct 14, 2014 at 6:07

nu11p01n73R

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2 Comments

Tomasz Kapłoński Over a year ago

Didn't help:

mdecrypt iweb_pass.nc -F mdecrypt: iweb_pass already exists; do you wish to overwrite (y or n)?y Enter passphrase:  File iweb_pass.nc was decrypted.

Tomasz Kapłoński Over a year ago

But the file name I specified is in fact where I store encrypted data - otherwise how mdecrypt will determine what should it decrypt?

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