hexablog

RSA Cheatsheet

Posted on Dec 20, 2022

I made a RSA cheatsheet so I don’t have to search up about it every time.

To generate a private key

openssl genrsa 2024 > secret.key

To generate a public key

openssl rsa -pubout < secret.key > public.key

To encrypt a plaintext

openssl pkeyutl -encrypt -pubin -inkey public.key -in plaintext -out ciphertext

To decrypt a ciphertext

openssl pkeyutl -decrypt -inkey secret.key -in ciphertext -out plaintext