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https://github.com/wisespace-io/yubico-rs

Yubikey client API library, Challenge-Response & Configuration
https://github.com/wisespace-io/yubico-rs

authentication otp rust yubico-otp yubikey

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Yubikey client API library, Challenge-Response & Configuration

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# Yubico   [![Build Status]][travis] [![Latest Version]][crates.io] [![MIT licensed]][MIT] [![Apache-2.0 licensed]][APACHE]

[Build Status]: https://travis-ci.org/wisespace-io/yubico-rs.png?branch=master
[travis]: https://travis-ci.org/wisespace-io/yubico-rs
[Latest Version]: https://img.shields.io/crates/v/yubico.svg
[crates.io]: https://crates.io/crates/yubico
[MIT licensed]: https://img.shields.io/badge/License-MIT-blue.svg
[MIT]: ./LICENSE-MIT
[Apache-2.0 licensed]: https://img.shields.io/badge/License-Apache%202.0-blue.svg
[APACHE]: ./LICENSE-APACHE

**Enables integration with the Yubico validation platform, so you can use Yubikey's one-time-password in your Rust application, allowing a user to authenticate via Yubikey.**

---

## Current features

- [X] Synchronous Yubikey client API library, [validation protocol version 2.0](https://developers.yubico.com/yubikey-val/Validation_Protocol_V2.0.html).
- [X] Asynchronous Yubikey client API library relying on [Tokio](https://github.com/tokio-rs/tokio)

**Note:** The USB-related features have been moved to a sepatated repository, [yubico-manager](https://github.com/wisespace-io/yubico-manager)

## Usage

Add this to your Cargo.toml

```toml
[dependencies]
yubico = "0.9"
```

The following are a list of Cargo features that can be enabled or disabled:

- online-tokio (enabled by default): Provides integration to Tokio using futures.

You can enable or disable them using the example below:

```toml
[dependencies.yubico]
version = "0.9"
# don't include the default features (online-tokio)
default-features = false
# cherry-pick individual features
features = []
```

[Request your api key](https://upgrade.yubico.com/getapikey/).

### OTP with Default Servers

```rust
extern crate yubico;

use yubico::config::*;
use yubico::verify;

fn main() {
let config = Config::default()
.set_client_id("CLIENT_ID")
.set_key("API_KEY");

match verify("OTP", config) {
Ok(answer) => println!("{}", answer),
Err(e) => println!("Error: {}", e),
}
}
```

## OTP with custom API servers

```rust
extern crate yubico;

use yubico::verify;
use yubico::config::*;

fn main() {
let config = Config::default()
.set_client_id("CLIENT_ID")
.set_key("API_KEY")
.set_api_hosts(vec!["https://api.example.com/verify".into()]);

match verify("OTP", config) {
Ok(answer) => println!("{}", answer),
Err(e) => println!("Error: {}", e),
}
}
```

### Asynchronous OTP validation

```rust
#![recursion_limit="128"]
extern crate futures;
extern crate tokio;
extern crate yubico;

use futures::future::Future;
use yubico::verify_async;
extern crate yubico;

use std::io::stdin;
use yubico::config::Config;

fn main() {
println!("Please plug in a yubikey and enter an OTP");

let client_id = std::env::var("YK_CLIENT_ID")
.expect("Please set a value to the YK_CLIENT_ID environment variable.");

let api_key = std::env::var("YK_API_KEY")
.expect("Please set a value to the YK_API_KEY environment variable.");

let otp = read_user_input();

let config = Config::default()
.set_client_id(client_id)
.set_key(api_key);

tokio::run(verify_async(otp, config)
.unwrap()
.map(|_|{
println!("Valid OTP.");
})
.map_err(|err|{
println!("Invalid OTP. Cause: {:?}", err);
}))
}

fn read_user_input() -> String {
let mut buf = String::new();

stdin()
.read_line(&mut buf)
.expect("Could not read user input.");

buf
}
```

## Docker

For convenience and reproducibility, a Docker image can be generated via the provided repo's Dockerfile.

Build:
```bash
$ docker build -t yubico-rs .
...
Successfully built 983cc040c78e
Successfully tagged yubico-rs:latest
```

Run:
```bash
$ docker run --rm -it -e YK_CLIENT_ID=XXXXX -e YK_API_KEY=XXXXXXXXXXXXXX yubico-rs:latest
Please plug in a yubikey and enter an OTP
ccccccXXXXXXXXXXXXXXXXXXXX
The OTP is valid.
```

## Changelog

- 0.10.0: Upgrade to `tokio` 1.1 and `reqwest` 0.11
- 0.9.2: (Yanked) Dependencies update
- 0.9.1: Set HTTP Proxy (Basic-auth is optional)
- 0.9.0: Moving to `tokio` 0.2 and `reqwest` 0.10
- 0.9.0-alpha.1: Moving to `futures` 0.3.0-alpha.19
- 0.8: Rename the `sync` and `async` modules to `sync_verifier` and `async_verifier` to avoid the use of the `async` reserved keyword.