[RustCrypto]: Cryptographic Big Integers

Pure Rust implementation of a big integer library which has been designed from the ground-up for use in cryptographic applications.

Provides constant-time, no_std-friendly implementations of modern formulas using const generics.

Documentation

Minimum Supported Rust Version

Rust 1.51 at a minimum.

Goals

• No heap allocations (no_std-friendly)
• Constant-time by default. We may add variable-time operations in the future but they will be secondary and explicitly marked as such.
• Leverage what is possible today with const generics on stable rust.
• Support const fn as much as possible, including decoding big integers from bytes/hex and performing arithmetic operations on them, with the goal of being able to compute values at compile-time.

Status

This library presently provides only a baseline level of functionality. It's new, unaudited, and may contain bugs. We recommend that it only be used in an experimental capacity for now.

Please see the [feature wishlist tracking ticket] for more information.

License

Licensed under either of:

• Apache License, Version 2.0
• MIT license

at your option.

Contribution

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.