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.}