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//! Rust bindings to the [sodium library](https://github.com/jedisct1/libsodium).
//!
//! Sodium is a portable implementation of Dan Bernsteins [NaCl: Networking and
//! Cryptography library](http://nacl.cr.yp.to)
//!
//! For most users, if you want public-key (asymmetric) cryptography you should use
//! the functions in `crypto::box_` for encryption/decryption.
//!
//! If you want secret-key (symmetric) cryptography you should be using the
//! functions in `crypto::secretbox` for encryption/decryption.
//!
//! For public-key signatures you should use the functions in `crypto::sign` for
//! signature creation and verification.
//!
//! Unless you know what you're doing you most certainly don't want to use the
//! functions in `crypto::scalarmult`, `crypto::stream`, `crypto::auth` and
//! `crypto::onetimeauth`.
//!
//! ## Thread Safety
//! All functions in this library are thread-safe provided that the `init()`
//! function has been called during program execution.
//!
//! If `init()` hasn't been called then all functions except the random-number
//! generation functions and the key-generation functions are thread-safe.
//!
//! # Public-key cryptography
//! `crypto::box_`
//!
//! `crypto::sign`
//!
//! # Secret-key cryptography
//! `crypto::secretbox`
//!
//! `crypto::stream`
//!
//! `crypto::auth`
//!
//! `crypto::onetimeauth`
//!
//! # Low-level functions
//! `crypto::hash`
//!
//! `crypto::verify`
//!
//! `crypto::shorthash`
extern crate barnacl_sys as ffi;
extern crate libc;
extern crate rustc_serialize;
/// `init()` initializes the sodium library and chooses faster versions of
/// the primitives if possible. `init()` also makes the random number generation
/// functions (`gen_key`, `gen_keypair`, `gen_nonce`, `randombytes`, `randombytes_into`)
/// thread-safe
/// Cryptographic functions