// Copyright (C) 2018 The Duniter Project Developers.
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//! Provide wrappers around public keys, private keys and signatures.
//!
//! - Keys can be converted to/from Base58 string format.
//! - Signatures can be converted to/from Base64 string format.
//!
//! # Usage
//!
//! ```
//! use duniter_keys::{Signature, PublicKey, PrivateKey};
//! use duniter_keys::ed25519::KeyPairGenerator;
//!
//! let generator = KeyPairGenerator::with_default_parameters();
//!
//! let (private_key, public_key) = generator.generate(
//! b"password",
//! b"salt"
//! );
//!
//! let message = "Hello, world!";
//!
//! let signature = private_key.sign(&message.as_bytes());
//!
//! assert!(public_key.verify(&message.as_bytes(), &signature));
//! ```
//!
//! # Format
//!
//! - Base58 use the following alphabet :
//! `123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz`
//! - Base64 use the following alphabet :
//! `ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/`
//! with `=` as padding character.
extern crate base58;
extern crate base64;
extern crate crypto;
use Display;
use Debug;
use ToBase58;
/// Errors enumeration for Base58/64 strings convertion.
/// Store a cryptographic signature.
///
/// A signature can be converted from/to Base64 format.
/// When converted back and forth the value should be the same.
///
/// A signature can be made with a [`PrivateKey`]
/// and a message, and verified with the associated [`PublicKey`].
///
/// [`PrivateKey`]: trait.PrivateKey.html
/// [`PublicKey`]: trait.PublicKey.html
/// Store a cryptographic public key.
///
/// A `PublicKey` can be converted from/to Base64 format.
/// When converted back and forth the value should be the same.
///
/// A `PublicKey` is used to verify the signature of a message
/// with the associated [`PrivateKey`].
///
/// [`PrivateKey`]: trait.PrivateKey.html
/// Store a cryptographic private key.
///
/// A `PrivateKey` can be converted from/to Base58 format.
/// When converted back and forth the value should be the same.
///
/// A `PrivateKey` is used to sign a message. The corresponding [`PublicKey`]
/// will then be used to verify that signature.
///
/// [`PublicKey`]: trait.PublicKey.html