tulip/server/server.go

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package server
import (
"crypto/subtle"
_ "embed"
"encoding/json"
"fmt"
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"github.com/1f349/cache"
clientStore "github.com/1f349/tulip/client-store"
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"github.com/1f349/tulip/database"
"github.com/1f349/tulip/openid"
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scope2 "github.com/1f349/tulip/scope"
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"github.com/go-oauth2/oauth2/v4/errors"
"github.com/go-oauth2/oauth2/v4/generates"
"github.com/go-oauth2/oauth2/v4/manage"
"github.com/go-oauth2/oauth2/v4/server"
"github.com/go-oauth2/oauth2/v4/store"
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"github.com/google/uuid"
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"github.com/julienschmidt/httprouter"
"log"
"net/http"
"net/url"
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"strings"
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"time"
)
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var errInvalidScope = errors.New("missing required scope")
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type HttpServer struct {
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r *httprouter.Router
oauthSrv *server.Server
oauthMgr *manage.Manager
db *database.DB
conf Conf
privKey []byte
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// mailLinkCache contains a mapping of verify uuids to user uuids
mailLinkCache *cache.Cache[mailLinkKey, uuid.UUID]
}
const (
mailLinkDelete byte = iota
mailLinkResetPassword
mailLinkVerifyEmail
)
type mailLinkKey struct {
action byte
data uuid.UUID
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}
func (h *HttpServer) SafeRedirect(rw http.ResponseWriter, req *http.Request) {
redirectUrl := req.FormValue("redirect")
if redirectUrl == "" {
http.Redirect(rw, req, "/", http.StatusFound)
return
}
parse, err := url.Parse(redirectUrl)
if err != nil {
http.Error(rw, "Failed to parse redirect url: "+redirectUrl, http.StatusBadRequest)
return
}
if parse.Scheme != "" && parse.Opaque != "" && parse.User != nil && parse.Host != "" {
http.Error(rw, "Invalid redirect url: "+redirectUrl, http.StatusBadRequest)
return
}
http.Redirect(rw, req, parse.String(), http.StatusFound)
}
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func NewHttpServer(conf Conf, db *database.DB, privKey []byte) *http.Server {
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r := httprouter.New()
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// remove last slash from baseUrl
{
l := len(conf.BaseUrl)
if conf.BaseUrl[l-1] == '/' {
conf.BaseUrl = conf.BaseUrl[:l-1]
}
}
openIdConf := openid.GenConfig(conf.BaseUrl, []string{"openid", "name", "username", "profile", "email", "birthdate", "age", "zoneinfo", "locale"}, []string{"sub", "name", "preferred_username", "profile", "picture", "website", "email", "email_verified", "gender", "birthdate", "zoneinfo", "locale", "updated_at"})
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openIdBytes, err := json.Marshal(openIdConf)
if err != nil {
log.Fatalln("Failed to generate OpenID configuration:", err)
}
oauthManager := manage.NewDefaultManager()
oauthSrv := server.NewServer(server.NewConfig(), oauthManager)
hs := &HttpServer{
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r: httprouter.New(),
oauthSrv: oauthSrv,
oauthMgr: oauthManager,
db: db,
conf: conf,
privKey: privKey,
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mailLinkCache: cache.New[mailLinkKey, uuid.UUID](),
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}
oauthManager.SetAuthorizeCodeTokenCfg(manage.DefaultAuthorizeCodeTokenCfg)
oauthManager.MustTokenStorage(store.NewMemoryTokenStore())
oauthManager.MapAccessGenerate(generates.NewAccessGenerate())
oauthManager.MapClientStorage(clientStore.New(db))
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oauthSrv.SetResponseErrorHandler(func(re *errors.Response) {
log.Printf("Response error: %#v\n", re)
})
oauthSrv.SetClientInfoHandler(func(req *http.Request) (clientID, clientSecret string, err error) {
cId, cSecret, err := server.ClientBasicHandler(req)
if cId == "" && cSecret == "" {
cId, cSecret, err = server.ClientFormHandler(req)
}
if err != nil {
return "", "", err
}
return cId, cSecret, nil
})
oauthSrv.SetUserAuthorizationHandler(hs.oauthUserAuthorization)
oauthSrv.SetAuthorizeScopeHandler(func(rw http.ResponseWriter, req *http.Request) (scope string, err error) {
var form url.Values
if req.Method == http.MethodPost {
form = req.PostForm
} else {
form = req.URL.Query()
}
a := form.Get("scope")
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if !scope2.ScopesExist(a) {
return "", errInvalidScope
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}
return a, nil
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})
r.GET("/.well-known/openid-configuration", func(rw http.ResponseWriter, req *http.Request, params httprouter.Params) {
rw.WriteHeader(http.StatusOK)
_, _ = rw.Write(openIdBytes)
})
r.GET("/", OptionalAuthentication(false, hs.Home))
r.POST("/logout", RequireAuthentication(func(rw http.ResponseWriter, req *http.Request, params httprouter.Params, auth UserAuth) {
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lNonce, ok := auth.Session.Get("action-nonce")
if !ok {
http.Error(rw, "Missing nonce", http.StatusInternalServerError)
return
}
if subtle.ConstantTimeCompare([]byte(lNonce.(string)), []byte(req.PostFormValue("nonce"))) == 1 {
auth.Session.Delete("session-data")
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if auth.Session.Save() != nil {
http.Error(rw, "Failed to save session", http.StatusInternalServerError)
return
}
http.Redirect(rw, req, "/", http.StatusFound)
return
}
http.Error(rw, "Logout failed", http.StatusInternalServerError)
}))
// login steps
r.GET("/login", OptionalAuthentication(false, hs.LoginGet))
r.POST("/login", OptionalAuthentication(false, hs.LoginPost))
r.GET("/login/otp", OptionalAuthentication(true, hs.LoginOtpGet))
r.POST("/login/otp", OptionalAuthentication(true, hs.LoginOtpPost))
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// mail codes
r.GET("/mail/verify/:code", hs.MailVerify)
r.GET("/mail/password/:code", hs.MailPassword)
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r.POST("/mail/password", hs.MailPasswordPost)
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r.GET("/mail/delete/:code", hs.MailDelete)
// edit profile pages
r.GET("/edit", RequireAuthentication(hs.EditGet))
r.POST("/edit", RequireAuthentication(hs.EditPost))
r.POST("/edit/otp", RequireAuthentication(hs.EditOtpPost))
// management pages
r.GET("/manage/apps", hs.RequireAdminAuthentication(hs.ManageAppsGet))
r.POST("/manage/apps", hs.RequireAdminAuthentication(hs.ManageAppsPost))
r.GET("/manage/users", hs.RequireAdminAuthentication(hs.ManageUsersGet))
r.POST("/manage/users", hs.RequireAdminAuthentication(hs.ManageUsersPost))
// oauth pages
r.GET("/authorize", RequireAuthentication(hs.authorizeEndpoint))
r.POST("/authorize", RequireAuthentication(hs.authorizeEndpoint))
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r.POST("/token", func(rw http.ResponseWriter, req *http.Request, params httprouter.Params) {
if err := oauthSrv.HandleTokenRequest(rw, req); err != nil {
http.Error(rw, err.Error(), http.StatusInternalServerError)
}
})
r.GET("/userinfo", func(rw http.ResponseWriter, req *http.Request, params httprouter.Params) {
token, err := oauthSrv.ValidationBearerToken(req)
if err != nil {
http.Error(rw, "403 Forbidden", http.StatusForbidden)
return
}
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userId := token.GetUserID()
userUuid, err := uuid.Parse(userId)
if err != nil {
http.Error(rw, "Invalid User ID", http.StatusBadRequest)
return
}
fmt.Printf("Using token for user: %s by app: %s with scope: '%s'\n", userId, token.GetClientID(), token.GetScope())
claims := ParseClaims(token.GetScope())
if !claims["openid"] {
http.Error(rw, "Invalid scope", http.StatusBadRequest)
return
}
var userData *database.User
if hs.DbTx(rw, func(tx *database.Tx) (err error) {
userData, err = tx.GetUser(userUuid)
return err
}) {
return
}
m := map[string]any{}
m["sub"] = userId
m["aud"] = token.GetClientID()
if claims["name"] {
m["name"] = userData.Name
}
if claims["username"] {
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m["preferred_username"] = userData.Username
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}
if claims["profile"] {
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m["profile"] = conf.BaseUrl + "/user/" + userData.Username
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m["picture"] = userData.Picture.String()
m["website"] = userData.Website.String()
}
if claims["email"] {
m["email"] = userData.Email
m["email_verified"] = userData.EmailVerified
}
if claims["birthdate"] {
m["birthdate"] = userData.Birthdate.String()
}
if claims["age"] {
m["age"] = CalculateAge(userData.Birthdate.Time.In(userData.ZoneInfo.Location))
}
if claims["zoneinfo"] {
m["zoneinfo"] = userData.ZoneInfo.Location.String()
}
if claims["locale"] {
m["locale"] = userData.Locale.Tag.String()
}
m["updated_at"] = time.Now().Unix()
_ = json.NewEncoder(rw).Encode(m)
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})
return &http.Server{
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Addr: conf.Listen,
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Handler: r,
ReadTimeout: time.Minute,
ReadHeaderTimeout: time.Minute,
WriteTimeout: time.Minute,
IdleTimeout: time.Minute,
MaxHeaderBytes: 2500,
}
}
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func ParseClaims(claims string) map[string]bool {
m := make(map[string]bool)
for {
n := strings.IndexByte(claims, ' ')
if n == -1 {
if claims != "" {
m[claims] = true
}
break
}
a := claims[:n]
claims = claims[n+1:]
if a != "" {
m[a] = true
}
}
return m
}
var ageTimeNow = func() time.Time { return time.Now() }
func CalculateAge(t time.Time) int {
n := ageTimeNow()
// the birthday is in the future so the age is 0
if n.Before(t) {
return 0
}
// the year difference
dy := n.Year() - t.Year()
// the birthday in the current year
tCurrent := t.AddDate(dy, 0, 0)
// minus 1 if the birthday has not yet occurred in the current year
if tCurrent.Before(n) {
dy -= 1
}
return dy
}