session authentication guards

trifid-api/migrations/20230204185754_magic_links.sql

@@ -1,5 +1,5 @@
 CREATE TABLE magic_links (
-    id VARCHAR(36) NOT NULL PRIMARY KEY UNIQUE,
+    id VARCHAR(39) NOT NULL PRIMARY KEY UNIQUE,
     user_id SERIAL NOT NULL REFERENCES users(id),
     expires_on INTEGER NOT NULL
 );

trifid-api/migrations/20230206012409_create_session_tokens.sql

@@ -1,5 +1,5 @@
 CREATE TABLE session_tokens (
-    id VARCHAR(36) NOT NULL PRIMARY KEY,
+    id VARCHAR(39) NOT NULL PRIMARY KEY,
     user_id SERIAL NOT NULL REFERENCES users(id),
     expires_on INTEGER NOT NULL
 );

trifid-api/migrations/20230206031048_create_auth_tokens.sql

@@ -0,0 +1,5 @@
+CREATE TABLE auth_tokens (
+    id VARCHAR(39) NOT NULL PRIMARY KEY,
+    user_id SERIAL NOT NULL REFERENCES users(id),
+    session_token VARCHAR(39) NOT NULL REFERENCES session_tokens(id)
+);

trifid-api/src/auth.rs

@@ -0,0 +1,124 @@
+use rocket::http::Status;
+use rocket::{Request, State};
+use rocket::request::{FromRequest, Outcome};
+use sqlx::PgPool;
+use crate::tokens::{validate_auth_token, validate_session_token};
+
+pub struct PartialUserInfo {
+    pub user_id: i32,
+    pub created_at: i64,
+    pub email: String,
+    pub hasTotp: bool
+}
+
+#[derive(Debug)]
+pub enum AuthenticationError {
+    MissingToken,
+    InvalidToken,
+    DatabaseError,
+    RequiresTOTP
+}
+
+#[rocket::async_trait]
+impl<'r> FromRequest<'r> for PartialUserInfo {
+    type Error = AuthenticationError;
+
+    async fn from_request(req: &'r Request<'_>) -> Outcome<Self, Self::Error> {
+        let headers = req.headers();
+
+        // make sure the bearer token exists
+        if let Some(authorization) = headers.get_one("Authorization") {
+            // parse bearer token
+            let components = authorization.split(' ').collect::<Vec<&str>>();
+
+            if components.len() != 2 || components.len() != 3 {
+                return Outcome::Failure((Status::Unauthorized, AuthenticationError::MissingToken));
+            }
+
+            if components[0] != "Bearer" {
+                return Outcome::Failure((Status::Unauthorized, AuthenticationError::InvalidToken));
+            }
+
+            if components.len() == 2 && components[1].starts_with("st-") {
+                return Outcome::Failure((Status::Unauthorized, AuthenticationError::InvalidToken));
+            }
+
+            let st: String;
+            let user_id: i64;
+            let at: Option<String>;
+
+            match &components[1][..3] {
+                "st-" => {
+                    // validate session token
+                    st = components[1].to_string();
+                    match validate_session_token(st.clone(), req.rocket().state().unwrap()).await {
+                        Ok(uid) => user_id = uid,
+                        Err(_) => return Outcome::Failure((Status::Unauthorized, AuthenticationError::InvalidToken))
+                    }
+                },
+                _ => return Outcome::Failure((Status::Unauthorized, AuthenticationError::InvalidToken))
+            }
+
+            if components.len() == 3 {
+                match &components[2][..3] {
+                    "at-" => {
+                        // validate auth token
+                        at = Some(components[2].to_string());
+                        match validate_auth_token(at.clone().unwrap().clone(), st.clone(), req.rocket().state().unwrap()).await {
+                            Ok(_) => (),
+                            Err(_) => return Outcome::Failure((Status::Unauthorized, AuthenticationError::InvalidToken))
+                        }
+                    },
+                    _ => return Outcome::Failure((Status::Unauthorized, AuthenticationError::InvalidToken))
+                }
+            } else {
+                at = None;
+            }
+
+            // this user is 100% valid and authenticated, fetch their info
+
+            let user = match sqlx::query!("SELECT * FROM users WHERE id = $1", user_id.clone() as i32).fetch_one(req.rocket().state().unwrap()).await {
+                Ok(u) => u,
+                Err(_) => return Outcome::Failure((Status::InternalServerError, AuthenticationError::DatabaseError))
+            };
+
+            Outcome::Success(PartialUserInfo {
+                user_id: user_id as i32,
+                created_at: user.created_on as i64,
+                email: user.email,
+                hasTotp: at.is_some(),
+            })
+        } else {
+            Outcome::Failure((Status::Unauthorized, AuthenticationError::MissingToken))
+        }
+    }
+}
+
+pub struct TOTPAuthenticatedUserInfo {
+    pub user_id: i32,
+    pub created_at: i64,
+    pub email: String,
+}
+#[rocket::async_trait]
+impl<'r> FromRequest<'r> for TOTPAuthenticatedUserInfo {
+    type Error = AuthenticationError;
+
+    async fn from_request(request: &'r Request<'_>) -> Outcome<Self, Self::Error> {
+        let userinfo = PartialUserInfo::from_request(request).await;
+        match userinfo {
+            Outcome::Failure(e) => Outcome::Failure(e),
+            Outcome::Forward(f) => Outcome::Forward(f),
+            Outcome::Success(s) => {
+                if s.hasTotp {
+                    Outcome::Success(Self {
+                        user_id: s.user_id,
+                        created_at: s.created_at,
+                        email: s.email,
+                    })
+                } else {
+                    Outcome::Failure((Status::Unauthorized, AuthenticationError::RequiresTOTP))
+                }
+            }
+        }
+    }
+}

trifid-api/src/main.rs

@@ -14,6 +14,7 @@ pub mod db;
 pub mod config;
 pub mod tokens;
 pub mod routes;
+pub mod auth;
 
 static MIGRATOR: Migrator = sqlx::migrate!();
 

trifid-api/src/tokens.rs

@@ -8,7 +8,7 @@ use std::time::UNIX_EPOCH;
 
 // https://admin.defined.net/auth/magic-link?email=coredoescode%40gmail.com&token=ml-ckBsgw_5IdK5VYgseBYcoV_v_cQjtdq1re_RhDu_MKg
 pub async fn send_magic_link(id: i64, email: String, db: &PgPool, config: &TFConfig) -> Result<(), Box<dyn Error>> {
-    let otp = Uuid::new_v4().to_string();
+    let otp = format!("ml-{}", Uuid::new_v4().to_string());
     let otp_url = config.base.join(&format!("/auth/magic-link?email={}&token={}", urlencoding::encode(&email.clone()), otp.clone())).unwrap();
     sqlx::query!("INSERT INTO magic_links (id, user_id, expires_on) VALUES ($1, $2, $3) ON CONFLICT DO NOTHING;", otp, id as i32, SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs() as i32 + config.magic_links_valid_for as i32).execute(db).await?;
     // TODO: send email
@@ -16,8 +16,22 @@ pub async fn send_magic_link(id: i64, email: String, db: &PgPool, config: &TFCon
     Ok(())
 }
 
-pub async fn generate_session_token(id: i64, db: &PgPool, config: &TFConfig) -> Result<String, Box<dyn Error>> {
-    let token = Uuid::new_v4().to_string();
-    sqlx::query!("INSERT INTO session_tokens (id, user_id, expires_on) VALUES ($1, $2, $3) ON CONFLICT DO NOTHING;", token, id as i32, SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs() as i32 + config.session_tokens_valid_for as i32).execute(db).await?;
+pub async fn generate_session_token(user_id: i64, db: &PgPool, config: &TFConfig) -> Result<String, Box<dyn Error>> {
+    let token = format!("st-{}", Uuid::new_v4());
+    sqlx::query!("INSERT INTO session_tokens (id, user_id, expires_on) VALUES ($1, $2, $3) ON CONFLICT DO NOTHING;", token, user_id as i32, SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs() as i32 + config.session_tokens_valid_for as i32).execute(db).await?;
     Ok(token)
 }
+pub async fn validate_session_token(token: String, db: &PgPool) -> Result<i64, Box<dyn Error>> {
+    Ok(sqlx::query!("SELECT user_id FROM session_tokens WHERE id = $1 AND expires_on < $2", token, SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs() as i32).fetch_one(db).await?.user_id as i64)
+}
+
+pub async fn generate_auth_token(user_id: i64, session_id: String, db: &PgPool, config: &TFConfig) -> Result<String, Box<dyn Error>> {
+    let token = format!("at-{}", Uuid::new_v4());
+    sqlx::query!("INSERT INTO auth_tokens (id, session_token, user_id) VALUES ($1, $2, $3) ON CONFLICT DO NOTHING;", token, session_id, user_id as i32).execute(db).await?;
+    Ok(token)
+}
+pub async fn validate_auth_token(token: String, session_id: String, db: &PgPool) -> Result<(), Box<dyn Error>> {
+    validate_session_token(token.clone(), db).await?;
+    sqlx::query!("SELECT * FROM auth_tokens WHERE id = $1 AND session_token = $2", token, session_id).fetch_one(db).await?;
+    Ok(())
+}