I want to create a 128bit AES key made up of specific letters. I think I would need to use something like
openssl genrsa -aes128 -out privkey.pem
openssl genrsa -out privkey.pem
but I'm not sure how to make an AES with a 128bit key made up of specific letters that I choose. Am I thinking of this in the wrong way?
Edit: I wonder if doing something like openssl enc -aes-128-cbc -k secret -P -md sha1 would work