How to decrypt a file to a temporary one, and read it without saving?

Question

say this:

openssl enc -aes-256-cbc -e -in test.txt -out test-enc.txt

Then

rm test.txt

Then, I'd like do decrypt text-enc.txt without saving the output, just see it on a text editor (say sublime text) and then close and forget. So on my disc there's only test-enc.txt. Is it possible?

If possible, I'd like to save some aliases on my bashrc to open, modify and encrypt it again.

Answer 1

You can use /dev/shm, which is usually populated with a tmpfs which resides in memory only. Another way would be to use pipes for transferring the data from openssl ... -out /dev/stdout to the desired program using pipes and stdin.

To ensure this data is never written to disk it can be mounted with the noswap option, available since release 6.4 of the Linux kernel.