Oracle

Oracle is a go library that provides the following cryptographic functions:

• generate key-pairs
• encrypt messages
• decrypt messages
• sign messages
• validate messages

Oracle is the basic object that can perform these functions. It also has the concept of a Peer. An Oracle is to a private key as a Peer is to a public key.

Keys are Curve25519. Messages are encrypted using ChaCha20-Poly1305 AEAD. Perfect forward secrecy is assured by making use of one-time ephemeral keys.

This project is heavily inspired by age, especially with respect to cryptographic design. However, I beleive that Oracle provides the following advantages, making it a better choice in some situations:

• Simpler API, doing away with unesseary abstractions
• A simple, standard format for messages (PEM)
• Package first. Oracle is first and foremost a Go package with a sensible API
• Do one thing and do it well. The companion binary goracle honours the Linux philosophy by accepting input from stdin and producing output to stdout, unlocking composability.

Oracle also comes with a binary called pemreader that reads PEM files.