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# Changelog
## v5.0.1
- `base64` upgraded to 0.22
## v5.0.0
- `ring` upgraded to 0.17.0
- `base64` upgraded
- Support Rust 2021 edition
## v4.0.0
- Hide base64::DecodeError
## v3.0.0
- The cryptography library used is now configurable.
- By default `ring` is used (the `use_ring` feature).
- You can use the `use_openssl` feature to use openssl instead
- e.g. in your Cargo.toml:
```toml
[dependencies.hawk]
version = "..."
features = ["use_openssl"]
default-features = false
```
- You can use neither and provide your own implementation using the functions in
`hawk::crypto` if neither feature is enabled.
- Note that enabling both `use_ring` and `use_openssl` will cause a build
failure.
- BREAKING: Many functions that previously returned `T` now return `hawk::Result<T>`.
- Specifically, `PayloadHasher::{hash,update,finish}`, `Key::{new,sign}`.
- BREAKING: `hawk::SHA{256,384,512}` are now `const` `DigestAlgorithm`s and not
aliases for `ring::Algorithm`
- BREAKING: `Key::new` now takes a `DigestAlgorithm` and not a
`&'static ring::Algorithm`.
- If you were passing e.g. `&hawk::SHA256`, you probably just need
to pass `hawk::SHA256` now instead.
- BREAKING (though unlikely): `Error::Rng` has been removed, and `Error::Crypto` added