RustCrypto: Constant-Time Base16 (hexadecimal)

Pure Rust implementation of Base16 (RFC 4648).

Implements lower and upper case Base16 variants without data-dependent branches or lookup tables, thereby providing portable "best effort" constant-time operation.

Supports no_std environments and avoids heap allocations in the core API (but also provides optional alloc support for convenience).

Documentation

Minimum Supported Rust Version

This crate requires Rust 1.56 at a minimum.

We may change the MSRV in the future, but it will be accompanied by a minor version bump.

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.