OpenSSL

Setup Key Pair

Create private key

openssl genrsa -out key.pem 2048

Create public key

openssl rsa -in key.pem -out key-public.pem -outform PEM -pubout

Save password to File

echo -n "enter_your_password" > key.txt

Encrypt file with passphase

openssl enc -aes-256-cbc -pass file:key.txt < UNENCRYPTED_FILE > encrypted.dat

Encrypt passphrase with public key

openssl rsautl -encrypt -pubin -inkey key-public.pem < key.txt > enc.key.txt

Decrypt encrypted passphrase with private key

openssl rsautl -decrypt -inkey key.pem < enc.key.txt > key.txt

Decrypt file

openssl enc -aes-256-cbc -d -pass file:key.txt < encrypted.dat > UNENCRYPTED_FILE