1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147

#![cfg_attr(feature = "nightly", deny(missing_docs))]
#![cfg_attr(feature = "nightly", feature(external_doc))]
#![cfg_attr(feature = "nightly", doc(include = "../README.md"))]
#![cfg_attr(test, deny(warnings))]
// #![cfg_attr(test, feature(plugin))]
// #![cfg_attr(test, plugin(clippy))]

#[macro_use]
extern crate failure;

extern crate dialoguer;
extern crate directories;
extern crate mkdirp;
extern crate reqwest;
extern crate serde;
extern crate serde_json;
#[macro_use]
extern crate serde_derive;

mod auth_response;
mod token;

use self::auth_response::AuthResponse;
use self::dialoguer::{Input, PasswordInput};
use self::directories::ProjectDirs;
use self::failure::Error;
use self::mkdirp::mkdirp;
use self::reqwest::{
  header::{ContentType, Headers, UserAgent},
  Client,
};
use self::token::Token;
use std::collections::HashMap;
use std::fs::File;
use std::io::prelude::*;

const GITHUB_URL: &'static str = "https://api.github.com/authorizations";

/// Configuration passed to create a new GitHub auth instance.
#[derive(Debug, Default)]
pub struct Config {
  /// GitHub auth scopes. E.g. `['user']`.
  // FIXME: convert scopes into a Vector of an Enum. Implement serializability
  // on it too.
  pub scopes: Option<Vec<String>>,

  /// Saved with the token on GitHub. Allows you to identify the purpose of this
  /// token from the GitHub UI.
  pub note: String,

  /// User agent used to make a request.
  pub user_agent: Option<String>,
}

/// A GitHub auth instance.
#[derive(Debug)]
pub struct Authenticator {
  name: String,
  config: Config,
}

/// An authentication returned by a GitHub auth instance.
#[derive(Debug)]
pub struct Authentication {
  /// The User's username.
  username: String,
  /// The token for the User.
  token: String,
}

impl Authenticator {
  /// Create a new instance.
  pub fn new(name: String, config: Config) -> Self {
    Authenticator { name, config }
  }

  /// Authenticate with GitHub.
  pub fn auth(&self) -> Result<Token, Error> {
    let dirs = ProjectDirs::from("com", "GitHub Auth", &self.name);
    let dir = dirs.data_dir();
    mkdirp(&dir)?;
    let filename = dir.join("token.json");

    if let Ok(mut file) = File::open(&filename) {
      let mut contents = String::new();
      file.read_to_string(&mut contents)?;
      let json: AuthResponse = serde_json::from_str(&contents)?;
      return Ok(Token::new(json.token));
    }

    // Get CLI input.
    let username = Input::new("GitHub username").interact()?;
    let password = PasswordInput::new("GitHub password").interact()?;
    let otp = Input::new("GitHub OTP (optional)").interact()?;

    // Perform HTTP request.
    let client = Client::new();
    let mut headers = Headers::new();
    headers.set_raw("X-GitHub-OTP", otp);
    headers.set(UserAgent::new("Rust GH Auth client"));
    headers.set(ContentType::json());
    let mut body = HashMap::new();
    // if let Some(scopes) = self.config.scopes {
    //   body.insert("scopes", *scopes);
    // }
    body.insert("note", &self.config.note);
    let mut res = client
      .post(GITHUB_URL)
      .json(&body)
      .headers(headers)
      .basic_auth(username, Some(password))
      .send()?;

    // Parse request output.
    let status = res.status();
    ensure!(
      status.is_success(),
      format!(
        "{:?} {:?}",
        res.text().unwrap(),
        status.canonical_reason().unwrap()
      )
    );

    let json: AuthResponse = res.json()?;

    let serialized = serde_json::to_string(&json)?;
    let mut file = File::create(&filename)?;
    file.write_all(&serialized.as_bytes())?;

    Ok(Token::new(json.token))
  }
}

impl Default for Authenticator {
  /// Create a new instance of
  fn default() -> Self {
    let mut config = Config::default();
    config.note = String::from(
      "An unidentified token created with the github_auth Rust crate.",
    );
    Authenticator {
      name: String::from("GitHub Auth"),
      config,
    }
  }
}