115 lines
3.4 KiB
Go
115 lines
3.4 KiB
Go
/*
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GoToSocial
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Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
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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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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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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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*/
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package router
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import (
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"crypto/rand"
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"errors"
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"fmt"
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"net/http"
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"github.com/gin-contrib/sessions"
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"github.com/gin-contrib/sessions/memstore"
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"github.com/gin-gonic/gin"
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"github.com/superseriousbusiness/gotosocial/internal/config"
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"github.com/superseriousbusiness/gotosocial/internal/db"
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"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
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"github.com/superseriousbusiness/gotosocial/internal/id"
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)
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// SessionOptions returns the standard set of options to use for each session.
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func SessionOptions(cfg *config.Config) sessions.Options {
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return sessions.Options{
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Path: "/",
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Domain: cfg.Host,
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MaxAge: 120, // 2 minutes
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Secure: true, // only use cookie over https
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HttpOnly: true, // exclude javascript from inspecting cookie
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SameSite: http.SameSiteDefaultMode, // https://datatracker.ietf.org/doc/html/draft-ietf-httpbis-cookie-same-site-00#section-4.1.1
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}
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}
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func useSession(cfg *config.Config, dbService db.DB, engine *gin.Engine) error {
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// check if we have a saved router session already
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routerSessions := []*gtsmodel.RouterSession{}
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if err := dbService.GetAll(&routerSessions); err != nil {
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if _, ok := err.(db.ErrNoEntries); !ok {
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// proper error occurred
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return err
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}
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}
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var rs *gtsmodel.RouterSession
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if len(routerSessions) == 1 {
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// we have a router session stored
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rs = routerSessions[0]
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} else if len(routerSessions) == 0 {
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// we have no router sessions so we need to create a new one
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var err error
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rs, err = routerSession(dbService)
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if err != nil {
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return fmt.Errorf("error creating new router session: %s", err)
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}
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} else {
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// we should only have one router session stored ever
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return errors.New("we had more than one router session in the db")
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}
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if rs == nil {
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return errors.New("error getting or creating router session: router session was nil")
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}
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store := memstore.NewStore(rs.Auth, rs.Crypt)
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store.Options(SessionOptions(cfg))
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sessionName := fmt.Sprintf("gotosocial-%s", cfg.Host)
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engine.Use(sessions.Sessions(sessionName, store))
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return nil
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}
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// routerSession generates a new router session with random auth and crypt bytes,
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// puts it in the database for persistence, and returns it for use.
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func routerSession(dbService db.DB) (*gtsmodel.RouterSession, error) {
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auth := make([]byte, 32)
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crypt := make([]byte, 32)
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if _, err := rand.Read(auth); err != nil {
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return nil, err
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}
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if _, err := rand.Read(crypt); err != nil {
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return nil, err
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}
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rid, err := id.NewULID()
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if err != nil {
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return nil, err
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}
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rs := >smodel.RouterSession{
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ID: rid,
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Auth: auth,
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Crypt: crypt,
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}
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if err := dbService.Put(rs); err != nil {
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return nil, err
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}
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return rs, nil
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}
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