2023-03-12 15:00:57 +00:00
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// GoToSocial
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// Copyright (C) GoToSocial Authors admin@gotosocial.org
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// SPDX-License-Identifier: AGPL-3.0-or-later
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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2023-01-02 12:10:50 +00:00
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package middleware
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import (
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"net/http"
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"github.com/gin-gonic/gin"
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"github.com/superseriousbusiness/gotosocial/internal/db"
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"github.com/superseriousbusiness/gotosocial/internal/log"
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"github.com/superseriousbusiness/gotosocial/internal/oauth"
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"github.com/superseriousbusiness/oauth2/v4"
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)
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// TokenCheck returns a new gin middleware for validating oauth tokens in requests.
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//
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// The middleware checks the request Authorization header for a valid oauth Bearer token.
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//
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// If no token was set in the Authorization header, or the token was invalid, the handler will return.
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//
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// If a valid oauth Bearer token was provided, it will be set on the gin context for further use.
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//
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// Then, it will check which *gtsmodel.User the token belongs to. If the user is not confirmed, not approved,
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// or has been disabled, then the middleware will return early. Otherwise, the User will be set on the
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// gin context for further processing by other functions.
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//
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// Next, it will look up the *gtsmodel.Account for the User. If the Account has been suspended, then the
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// middleware will return early. Otherwise, it will set the Account on the gin context too.
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//
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// Finally, it will check the client ID of the token to see if a *gtsmodel.Application can be retrieved
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// for that client ID. This will also be set on the gin context.
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//
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// If an invalid token is presented, or a user/account/application can't be found, then this middleware
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// won't abort the request, since the server might want to still allow public requests that don't have a
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// Bearer token set (eg., for public instance information and so on).
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func TokenCheck(dbConn db.DB, validateBearerToken func(r *http.Request) (oauth2.TokenInfo, error)) func(*gin.Context) {
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return func(c *gin.Context) {
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// Acquire context from gin request.
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ctx := c.Request.Context()
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if c.Request.Header.Get("Authorization") == "" {
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// no token set in the header, we can just bail
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return
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}
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ti, err := validateBearerToken(c.Copy().Request)
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if err != nil {
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log.Debugf(ctx, "token was passed in Authorization header but we could not validate it: %s", err)
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return
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}
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c.Set(oauth.SessionAuthorizedToken, ti)
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// check for user-level token
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if userID := ti.GetUserID(); userID != "" {
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log.Tracef(ctx, "authenticated user %s with bearer token, scope is %s", userID, ti.GetScope())
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// fetch user for this token
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user, err := dbConn.GetUserByID(ctx, userID)
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if err != nil {
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if err != db.ErrNoEntries {
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log.Errorf(ctx, "database error looking for user with id %s: %s", userID, err)
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return
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}
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log.Warnf(ctx, "no user found for userID %s", userID)
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return
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}
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if user.ConfirmedAt.IsZero() {
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log.Warnf(ctx, "authenticated user %s has never confirmed thier email address", userID)
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return
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}
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if !*user.Approved {
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log.Warnf(ctx, "authenticated user %s's account was never approved by an admin", userID)
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return
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}
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if *user.Disabled {
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log.Warnf(ctx, "authenticated user %s's account was disabled'", userID)
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return
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}
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c.Set(oauth.SessionAuthorizedUser, user)
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// fetch account for this token
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if user.Account == nil {
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acct, err := dbConn.GetAccountByID(ctx, user.AccountID)
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if err != nil {
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if err != db.ErrNoEntries {
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log.Errorf(ctx, "database error looking for account with id %s: %s", user.AccountID, err)
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return
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}
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log.Warnf(ctx, "no account found for userID %s", userID)
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return
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}
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user.Account = acct
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}
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if !user.Account.SuspendedAt.IsZero() {
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log.Warnf(ctx, "authenticated user %s's account (accountId=%s) has been suspended", userID, user.AccountID)
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return
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}
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c.Set(oauth.SessionAuthorizedAccount, user.Account)
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}
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// check for application token
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if clientID := ti.GetClientID(); clientID != "" {
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log.Tracef(ctx, "authenticated client %s with bearer token, scope is %s", clientID, ti.GetScope())
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// fetch app for this token
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app, err := dbConn.GetApplicationByClientID(ctx, clientID)
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if err != nil {
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if err != db.ErrNoEntries {
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log.Errorf(ctx, "database error looking for application with clientID %s: %s", clientID, err)
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return
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}
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log.Warnf(ctx, "no app found for client %s", clientID)
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return
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}
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c.Set(oauth.SessionAuthorizedApplication, app)
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}
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}
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}
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