NIST P-256 signatures for Cortex-M4 microcontrollers

Last update: Mar 14, 2021

Related tags

Cryptography rust nist p-256 signatures cortex-m4

Overview

nisty

NIST P256 signatures for Cortex-M4 microcontrollers

What is this?

Sometimes NIST P256 signatures need to be used. This is an attempt to create a library that is misuse-resistant for that.

The intended targets are Cortex-M4 and Cortex-M33 microcontrollers.

As backend, we use micro-ecc, exposed via micro-ecc-sys.

License

^{Nisty is licensed under either of Apache License, Version 2.0 or MIT License at your option.} ^{micro-ecc is licensed under BSD-2-Clause.}
_{Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in this work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.}

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Comments

Document the lack of side channel resistance

Since the micro-ecc RNG is never set by nisty, operations like signing and ECDH agreement have lower resistance to side-channels. It's difficult to fix this due to the global mutable state imposed by micro-ecc, but documenting it would be good.

opened by jonas-schievink 8

Owner

Embedded Cryptography for Cortex-M4/M33

GitHub https://docs.rs/nisty

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NIST P-256 signatures for Cortex-M4 microcontrollers

Related tags

Overview

nisty

What is this?

License

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