Salty

Ed25519 signatures for microcontrollers

Preface

Small, sweet, swift: Ed25519 signatures for microcontrollers.
With assembly optimizations for Cortex-M4 and Cortex-M33.

NOTE: This is work-in-progress and not audited!
The usual warnings apply: Your hamster will explode, etc. etc.

Goals

From highest to lowest priority:

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

The Plan

None of these releases exist quite yet.

v0.1.0

Basic signature functionality

v0.2.0

More tests!

  • fuzzing to test correctness against known good implementation
  • side-fuzzing to test for timing side-channels

v0.3.0

Completion! The rest of NaCl.

  • X22519
  • authenticated encryption

License

Salty is licensed under either of Apache License, Version 2.0 or MIT License at your option.