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// Copyright 2024 New Vector Ltd.
// Copyright 2023, 2024 The Matrix.org Foundation C.I.C.
//
// SPDX-License-Identifier: AGPL-3.0-only
// Please see LICENSE in the repository root for full details.
use std::net::IpAddr;
use chrono::{DateTime, Utc};
use oauth2_types::scope::Scope;
use serde::Serialize;
use ulid::Ulid;
use crate::{BrowserSession, InvalidTransitionError, Session, UserAgent};
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
#[serde(rename_all = "snake_case", tag = "state")]
pub enum DeviceCodeGrantState {
/// The device code grant is pending.
Pending,
/// The device code grant has been fulfilled by a user.
Fulfilled {
/// The browser session which was used to complete this device code
/// grant.
browser_session_id: Ulid,
/// The time at which this device code grant was fulfilled.
fulfilled_at: DateTime<Utc>,
},
/// The device code grant has been rejected by a user.
Rejected {
/// The browser session which was used to reject this device code grant.
browser_session_id: Ulid,
/// The time at which this device code grant was rejected.
rejected_at: DateTime<Utc>,
},
/// The device code grant was exchanged for an access token.
Exchanged {
/// The browser session which was used to exchange this device code
/// grant.
browser_session_id: Ulid,
/// The time at which the device code grant was fulfilled.
fulfilled_at: DateTime<Utc>,
/// The time at which this device code grant was exchanged.
exchanged_at: DateTime<Utc>,
/// The OAuth 2.0 session ID which was created by this device code
/// grant.
session_id: Ulid,
},
}
impl DeviceCodeGrantState {
/// Mark this device code grant as fulfilled, returning a new state.
///
/// # Errors
///
/// Returns an error if the device code grant is not in the [`Pending`]
/// state.
///
/// [`Pending`]: DeviceCodeGrantState::Pending
pub fn fulfill(
self,
browser_session: &BrowserSession,
fulfilled_at: DateTime<Utc>,
) -> Result<Self, InvalidTransitionError> {
match self {
DeviceCodeGrantState::Pending => Ok(DeviceCodeGrantState::Fulfilled {
browser_session_id: browser_session.id,
fulfilled_at,
}),
_ => Err(InvalidTransitionError),
}
}
/// Mark this device code grant as rejected, returning a new state.
///
/// # Errors
///
/// Returns an error if the device code grant is not in the [`Pending`]
/// state.
///
/// [`Pending`]: DeviceCodeGrantState::Pending
pub fn reject(
self,
browser_session: &BrowserSession,
rejected_at: DateTime<Utc>,
) -> Result<Self, InvalidTransitionError> {
match self {
DeviceCodeGrantState::Pending => Ok(DeviceCodeGrantState::Rejected {
browser_session_id: browser_session.id,
rejected_at,
}),
_ => Err(InvalidTransitionError),
}
}
/// Mark this device code grant as exchanged, returning a new state.
///
/// # Errors
///
/// Returns an error if the device code grant is not in the [`Fulfilled`]
/// state.
///
/// [`Fulfilled`]: DeviceCodeGrantState::Fulfilled
pub fn exchange(
self,
session: &Session,
exchanged_at: DateTime<Utc>,
) -> Result<Self, InvalidTransitionError> {
match self {
DeviceCodeGrantState::Fulfilled {
fulfilled_at,
browser_session_id,
..
} => Ok(DeviceCodeGrantState::Exchanged {
browser_session_id,
fulfilled_at,
exchanged_at,
session_id: session.id,
}),
_ => Err(InvalidTransitionError),
}
}
/// Returns `true` if the device code grant state is [`Pending`].
///
/// [`Pending`]: DeviceCodeGrantState::Pending
#[must_use]
pub fn is_pending(&self) -> bool {
matches!(self, Self::Pending)
}
/// Returns `true` if the device code grant state is [`Fulfilled`].
///
/// [`Fulfilled`]: DeviceCodeGrantState::Fulfilled
#[must_use]
pub fn is_fulfilled(&self) -> bool {
matches!(self, Self::Fulfilled { .. })
}
/// Returns `true` if the device code grant state is [`Rejected`].
///
/// [`Rejected`]: DeviceCodeGrantState::Rejected
#[must_use]
pub fn is_rejected(&self) -> bool {
matches!(self, Self::Rejected { .. })
}
/// Returns `true` if the device code grant state is [`Exchanged`].
///
/// [`Exchanged`]: DeviceCodeGrantState::Exchanged
#[must_use]
pub fn is_exchanged(&self) -> bool {
matches!(self, Self::Exchanged { .. })
}
}
#[derive(Debug, Clone, PartialEq, Eq, Serialize)]
pub struct DeviceCodeGrant {
pub id: Ulid,
#[serde(flatten)]
pub state: DeviceCodeGrantState,
/// The client ID which requested this device code grant.
pub client_id: Ulid,
/// The scope which was requested by this device code grant.
pub scope: Scope,
/// The user code which was generated for this device code grant.
/// This is the one that the user will enter into their client.
pub user_code: String,
/// The device code which was generated for this device code grant.
/// This is the one that the client will use to poll for an access token.
pub device_code: String,
/// The time at which this device code grant was created.
pub created_at: DateTime<Utc>,
/// The time at which this device code grant will expire.
pub expires_at: DateTime<Utc>,
/// The IP address of the client which requested this device code grant.
pub ip_address: Option<IpAddr>,
/// The user agent used to request this device code grant.
pub user_agent: Option<UserAgent>,
}
impl std::ops::Deref for DeviceCodeGrant {
type Target = DeviceCodeGrantState;
fn deref(&self) -> &Self::Target {
&self.state
}
}
impl DeviceCodeGrant {
/// Mark this device code grant as fulfilled, returning the updated grant.
///
/// # Errors
///
/// Returns an error if the device code grant is not in the [`Pending`]
/// state.
///
/// [`Pending`]: DeviceCodeGrantState::Pending
pub fn fulfill(
self,
browser_session: &BrowserSession,
fulfilled_at: DateTime<Utc>,
) -> Result<Self, InvalidTransitionError> {
Ok(Self {
state: self.state.fulfill(browser_session, fulfilled_at)?,
..self
})
}
/// Mark this device code grant as rejected, returning the updated grant.
///
/// # Errors
///
/// Returns an error if the device code grant is not in the [`Pending`]
///
/// [`Pending`]: DeviceCodeGrantState::Pending
pub fn reject(
self,
browser_session: &BrowserSession,
rejected_at: DateTime<Utc>,
) -> Result<Self, InvalidTransitionError> {
Ok(Self {
state: self.state.reject(browser_session, rejected_at)?,
..self
})
}
/// Mark this device code grant as exchanged, returning the updated grant.
///
/// # Errors
///
/// Returns an error if the device code grant is not in the [`Fulfilled`]
/// state.
///
/// [`Fulfilled`]: DeviceCodeGrantState::Fulfilled
pub fn exchange(
self,
session: &Session,
exchanged_at: DateTime<Utc>,
) -> Result<Self, InvalidTransitionError> {
Ok(Self {
state: self.state.exchange(session, exchanged_at)?,
..self
})
}
}