Encrypting files with rsa key pairs

1. Create or open a file that you would like to encrypt.
➜ ~ echo "my super secret information" > secret.txt ➜ ~ cat secret.txt my super secret information
2. If you havent already create a rsa key pair. If you would like to use existing rsa key pair skip this step and continue to step 3.
ssh-keygen
3. Convert your generated or existing public key to pem format.
openssl rsa -in ~/.ssh/id_rsa -pubout > ~/id_rsa.pub.pem
4. Now you are ready encrypt the file you created earliear.
cat secret.txt | openssl rsautl -encrypt -pubin -inkey ~/id_rsa.pub.pem > encrypted-secret.txt cat encrypted-secret.txt ????uG?????$?&?????VN?'?(????,þQaE咫:?i??t?(?jr.g?#?ջO???=*?e??<"?y'%
5. To decypt the secret
➜ ~ cat encrypted-secret.txt | openssl rsautl -decrypt -inkey ~/.ssh/id_rsa my super secret information