Add an ApiToken model, and an endpoint to get one

migrations/postgres/2018-10-21-163227_create_api_token/down.sql

@@ -0,0 +1,2 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE api_tokens;

migrations/postgres/2018-10-21-163227_create_api_token/up.sql

@@ -0,0 +1,9 @@
+-- Your SQL goes here
+CREATE TABLE api_tokens (
+    id SERIAL PRIMARY KEY,
+    creation_date TIMESTAMP NOT NULL DEFAULT now(),
+    value TEXT NOT NULL,
+    scopes TEXT NOT NULL,
+    app_id INTEGER NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
+    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE
+)

migrations/sqlite/2018-10-21-163241_create_api_token/down.sql

@@ -0,0 +1,2 @@
+-- This file should undo anything in `up.sql`
+DROP TABLE api_tokens;

migrations/sqlite/2018-10-21-163241_create_api_token/up.sql

@@ -0,0 +1,9 @@
+-- Your SQL goes here
+CREATE TABLE api_tokens (
+    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+    creation_date DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    value TEXT NOT NULL,
+    scopes TEXT NOT NULL,
+    app_id INTEGER NOT NULL REFERENCES apps(id) ON DELETE CASCADE,
+    user_id INTEGER NOT NULL REFERENCES users(id) ON DELETE CASCADE
+)

plume-common/src/utils.rs

@@ -1,5 +1,6 @@
 use gettextrs::gettext;
 use heck::CamelCase;
+use openssl::rand::rand_bytes;
 use pulldown_cmark::{Event, Parser, Options, Tag, html};
 use rocket::{
     http::uri::Uri,
@@ -7,6 +8,13 @@ use rocket::{
 };
 use std::collections::HashSet;
 
+/// Generates an hexadecimal representation of 32 bytes of random data
+pub fn random_hex() -> String {
+	let mut bytes = [0; 32];
+    rand_bytes(&mut bytes).expect("Error while generating client id");
+    bytes.into_iter().fold(String::new(), |res, byte| format!("{}{:x}", res, byte))
+}
+
 /// Remove non alphanumeric characters and CamelCase a string
 pub fn make_actor_id(name: String) -> String {
     name.as_str()

plume-models/src/api_tokens.rs

@@ -0,0 +1,40 @@
+use chrono::NaiveDateTime;
+use diesel::{self, ExpressionMethods, QueryDsl, RunQueryDsl};
+
+use schema::api_tokens;
+
+#[derive(Clone, Queryable)]
+pub struct ApiToken {
+    pub id: i32,
+    pub creation_date: NaiveDateTime,
+    pub value: String,
+
+    /// Scopes, separated by +
+    /// Global scopes are read and write
+    /// and both can be limited to an endpoint by affixing them with :ENDPOINT
+    ///
+    /// Examples :
+    ///
+    /// read
+    /// read+write
+    /// read:posts
+    /// read:posts+write:posts
+    pub scopes: String,
+    pub app_id: i32,
+    pub user_id: i32,
+}
+
+#[derive(Insertable)]
+#[table_name = "api_tokens"]
+pub struct NewApiToken {
+    pub value: String,
+    pub scopes: String,
+    pub app_id: i32,
+    pub user_id: i32,
+}
+
+impl ApiToken {
+    get!(api_tokens);
+    insert!(api_tokens, NewApiToken);
+    find_by!(api_tokens, find_by_value, value as String);
+}

plume-models/src/apps.rs

@@ -1,9 +1,9 @@
 use canapi::{Error, Provider};
 use chrono::NaiveDateTime;
 use diesel::{self, RunQueryDsl, QueryDsl, ExpressionMethods};
-use openssl::rand::rand_bytes;
 
 use plume_api::apps::AppEndpoint;
+use plume_common::utils::random_hex;
 use Connection;
 use schema::apps;
 
@@ -40,13 +40,9 @@ impl Provider<Connection> for App {
     }
 
     fn create(conn: &Connection, data: AppEndpoint) -> Result<AppEndpoint, Error> {
-        let mut id = [0; 32];
-        rand_bytes(&mut id).expect("Error while generating client id");
-        let client_id = id.into_iter().fold(String::new(), |res, byte| format!("{}{:x}", res, byte)); 
+        let client_id = random_hex();
 
-        let mut secret = [0; 32];
-        rand_bytes(&mut secret).expect("Error while generating client secret");
-        let client_secret = secret.into_iter().fold(String::new(), |res, byte| format!("{}{:x}", res, byte)); 
+        let client_secret = random_hex();
         let app = App::insert(conn, NewApp {
             name: data.name.expect("App::create: name is required"),
             client_id: client_id,
@@ -77,4 +73,5 @@ impl Provider<Connection> for App {
 impl App {
     get!(apps);
     insert!(apps, NewApp);
+    find_by!(apps, find_by_client_id, client_id as String);
 }

plume-models/src/lib.rs

@@ -214,6 +214,7 @@ pub fn ap_url(url: String) -> String {
 }
 
 pub mod admin;
+pub mod api_tokens;
 pub mod apps;
 pub mod blog_authors;
 pub mod blogs;

plume-models/src/schema.rs

@@ -1,3 +1,14 @@
+table! {
+    api_tokens (id) {
+        id -> Int4,
+        creation_date -> Timestamp,
+        value -> Text,
+        scopes -> Text,
+        app_id -> Int4,
+        user_id -> Int4,
+    }
+}
+
 table! {
     apps (id) {
         id -> Int4,
@@ -184,6 +195,8 @@ table! {
     }
 }
 
+joinable!(api_tokens -> apps (app_id));
+joinable!(api_tokens -> users (user_id));
 joinable!(blog_authors -> blogs (blog_id));
 joinable!(blog_authors -> users (author_id));
 joinable!(blogs -> instances (instance_id));
@@ -204,6 +217,7 @@ joinable!(tags -> posts (post_id));
 joinable!(users -> instances (instance_id));
 
 allow_tables_to_appear_in_same_query!(
+    api_tokens,
     apps,
     blog_authors,
     blogs,

src/api/mod.rs

@@ -1,2 +1,54 @@
+use rocket_contrib::Json;
+use serde_json;
+
+use plume_common::utils::random_hex;
+use plume_models::{
+    apps::App,
+    api_tokens::*,
+    db_conn::DbConn,
+    users::User,
+};
+
+#[derive(FromForm)]
+struct OAuthRequest {
+    client_id: String,
+    client_secret: String,
+    password: String,
+    username: String,
+    scopes: String,
+}
+
+#[get("/oauth2?<query>")]
+fn oauth(query: OAuthRequest, conn: DbConn) -> Json<serde_json::Value> {
+    let app = App::find_by_client_id(&*conn, query.client_id).expect("OAuth request from unknown client");
+    if app.client_secret == query.client_secret {
+        if let Some(user) = User::find_local(&*conn, query.username) {
+            if user.auth(query.password) {
+                let token = ApiToken::insert(&*conn, NewApiToken {
+                    app_id: app.id,
+                    user_id: user.id,
+                    value: random_hex(),
+                    scopes: query.scopes,
+                });
+                Json(json!({
+                    "token": token.value
+                }))
+            } else {
+                Json(json!({
+                    "error": "Wrong password"
+                }))
+            }
+        } else {
+            Json(json!({
+                "error": "Unknown user"
+            }))
+        }
+    } else {
+        Json(json!({
+            "error": "Invalid client_secret"
+        }))
+    }
+}
+
 pub mod apps;
 pub mod posts;

src/main.rs

@@ -156,6 +156,8 @@ fn main() {
             routes::errors::csrf_violation
         ])
         .mount("/api/v1", routes![
+            api::oauth,
+
             api::apps::create,
 
             api::posts::get,