Salty

Small sweet Ed25519 for microcontrollers.
With optimizations for Cortex-M4.

NOTE: This is work-in-progress and not fit for use!

Goals

From highest to lowest priority:

• understandable code
• timing side-channel free
• design for easy integration in embedded projects
• small compiled code size
• speed

The Plan

None of these releases exist yet.

v0.1.0

Basic signature functionality

• allocation free API for signatures
• transcription of Ed25519 from TweetNaCl

v0.2.0

Tests!

• integrate subtle
• fuzzing to test correctness against known good implementation
• side-fuzzing to test timing side-channels (or lack thereof, see v0.2.0)

v0.3.0

Faster!

• Bjoern Haase's field arithmetic optimizations

v0.4.0

Completion! The rest of NaCl

• X22519
• authenticated encryption
• asymmetric cryptography

License

Salty is licensed under either of Apache License, Version 2.0 or MIT License at your option. Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.