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//! An implementation of the [Streebog] cryptographic hash function defined
//! in GOST R 34.11-2012.
//!
//! # Usage
//! Hasher functionality is expressed via traits defined in the [`digest`]
//! crate.
//!
//! ```rust
//! use streebog::{Digest, Streebog256, Streebog512};
//! use hex_literal::hex;
//!
//! // create a hasher object, to use it do not forget to import `Digest` trait
//! let mut hasher = Streebog256::new();
//! // write input message
//! hasher.update(b"my");
//! hasher.update(b" ");
//! hasher.update(b"message");
//! // read hash digest (it will consume hasher)
//! let result = hasher.finalize();
//!
//! assert_eq!(result[..], hex!("
//!     a47752ba9491bd1d52dd5dcea6d8c08e9b1ee70c42a2fc3e0d1a2852468c1329
//! ")[..]);
//!
//! // same for Streebog512
//! let mut hasher = Streebog512::new();
//! hasher.update(b"my message");
//! let result = hasher.finalize();
//!
//! assert_eq!(result[..], hex!("
//!     c40cc26c37a683c74459820d884b766d9c96697a8d168c0272db8f4ecca2935b
//!     4164ede98fc9c8d2bafb1249b238676c81f5b97f98c393b99fdf2dc961391484
//! ")[..]);
//! ```
//!
//! See [RustCrypto/hashes][1] readme for additional examples.
//!
//! [Streebog]: https://en.wikipedia.org/wiki/Streebog
//! [1]: https://github.com/RustCrypto/hashes/blob/master/README.md#usage

#![no_std]
#![doc(
    html_logo_url = "https://raw.githubusercontent.com/RustCrypto/meta/master/logo.svg",
    html_favicon_url = "https://raw.githubusercontent.com/RustCrypto/meta/master/logo.svg"
)]
#![deny(unsafe_code)]
#![warn(missing_docs, rust_2018_idioms)]

#[cfg(feature = "std")]
extern crate std;

mod consts;
mod streebog;
mod table;

use digest::consts::{U32, U64};
pub use digest::{self, Digest};

#[cfg(feature = "std")]
use digest::Update;

/// Streebog-256 cryptographic hash function
pub type Streebog256 = streebog::Streebog<U32>;

/// Streebog-512 cryptographic hash function
pub type Streebog512 = streebog::Streebog<U64>;

opaque_debug::implement!(Streebog512);
opaque_debug::implement!(Streebog256);

digest::impl_write!(Streebog512);
digest::impl_write!(Streebog256);