mirror of
https://github.com/h44z/wg-portal.git
synced 2025-04-19 08:55:12 +00:00
389 lines
12 KiB
Go
389 lines
12 KiB
Go
package handlers
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import (
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"context"
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"net/http"
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"net/url"
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"strconv"
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"strings"
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"time"
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"github.com/go-pkgz/routegroup"
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"github.com/h44z/wg-portal/internal/app/api/core/request"
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"github.com/h44z/wg-portal/internal/app/api/core/respond"
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"github.com/h44z/wg-portal/internal/app/api/v0/model"
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"github.com/h44z/wg-portal/internal/config"
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"github.com/h44z/wg-portal/internal/domain"
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)
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type AuthenticationService interface {
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// GetExternalLoginProviders returns a list of all available external login providers.
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GetExternalLoginProviders(_ context.Context) []domain.LoginProviderInfo
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// PlainLogin authenticates a user with a username and password.
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PlainLogin(ctx context.Context, username, password string) (*domain.User, error)
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// OauthLoginStep1 initiates the OAuth login flow.
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OauthLoginStep1(_ context.Context, providerId string) (authCodeUrl, state, nonce string, err error)
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// OauthLoginStep2 completes the OAuth login flow and logins the user in.
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OauthLoginStep2(ctx context.Context, providerId, nonce, code string) (*domain.User, error)
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}
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type AuthEndpoint struct {
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cfg *config.Config
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authService AuthenticationService
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authenticator Authenticator
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session Session
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validate Validator
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}
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func NewAuthEndpoint(
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cfg *config.Config,
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authenticator Authenticator,
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session Session,
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validator Validator,
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authService AuthenticationService,
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) AuthEndpoint {
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return AuthEndpoint{
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cfg: cfg,
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authService: authService,
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authenticator: authenticator,
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session: session,
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validate: validator,
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}
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}
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func (e AuthEndpoint) GetName() string {
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return "AuthEndpoint"
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}
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func (e AuthEndpoint) RegisterRoutes(g *routegroup.Bundle) {
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apiGroup := g.Mount("/auth")
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apiGroup.HandleFunc("GET /providers", e.handleExternalLoginProvidersGet())
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apiGroup.HandleFunc("GET /session", e.handleSessionInfoGet())
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apiGroup.HandleFunc("GET /login/{provider}/init", e.handleOauthInitiateGet())
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apiGroup.HandleFunc("GET /login/{provider}/callback", e.handleOauthCallbackGet())
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apiGroup.HandleFunc("POST /login", e.handleLoginPost())
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apiGroup.With(e.authenticator.LoggedIn()).HandleFunc("POST /logout", e.handleLogoutPost())
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}
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// handleExternalLoginProvidersGet returns a gorm Handler function.
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//
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// @ID auth_handleExternalLoginProvidersGet
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// @Tags Authentication
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// @Summary Get all available external login providers.
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// @Produce json
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// @Success 200 {object} []model.LoginProviderInfo
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// @Router /auth/providers [get]
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func (e AuthEndpoint) handleExternalLoginProvidersGet() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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providers := e.authService.GetExternalLoginProviders(r.Context())
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respond.JSON(w, http.StatusOK, model.NewLoginProviderInfos(providers))
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}
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}
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// handleSessionInfoGet returns a gorm Handler function.
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//
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// @ID auth_handleSessionInfoGet
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// @Tags Authentication
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// @Summary Get information about the currently logged-in user.
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// @Produce json
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// @Success 200 {object} []model.SessionInfo
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// @Failure 500 {object} model.Error
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// @Router /auth/session [get]
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func (e AuthEndpoint) handleSessionInfoGet() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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currentSession := e.session.GetData(r.Context())
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var loggedInUid *string
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var firstname *string
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var lastname *string
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var email *string
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if currentSession.LoggedIn {
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uid := currentSession.UserIdentifier
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f := currentSession.Firstname
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l := currentSession.Lastname
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e := currentSession.Email
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loggedInUid = &uid
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firstname = &f
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lastname = &l
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email = &e
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}
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respond.JSON(w, http.StatusOK, model.SessionInfo{
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LoggedIn: currentSession.LoggedIn,
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IsAdmin: currentSession.IsAdmin,
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UserIdentifier: loggedInUid,
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UserFirstname: firstname,
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UserLastname: lastname,
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UserEmail: email,
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})
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}
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}
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// handleOauthInitiateGet returns a gorm Handler function.
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//
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// @ID auth_handleOauthInitiateGet
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// @Tags Authentication
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// @Summary Initiate the OAuth login flow.
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// @Produce json
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// @Success 200 {object} []model.LoginProviderInfo
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// @Router /auth/{provider}/init [get]
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func (e AuthEndpoint) handleOauthInitiateGet() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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currentSession := e.session.GetData(r.Context())
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autoRedirect, _ := strconv.ParseBool(request.QueryDefault(r, "redirect", "false"))
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returnTo := request.Query(r, "return")
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provider := request.Path(r, "provider")
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var returnUrl *url.URL
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var returnParams string
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redirectToReturn := func() {
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respond.Redirect(w, r, http.StatusFound, returnUrl.String()+"?"+returnParams)
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}
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if returnTo != "" {
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if !e.isValidReturnUrl(returnTo) {
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respond.JSON(w, http.StatusBadRequest,
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model.Error{Code: http.StatusBadRequest, Message: "invalid return URL"})
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return
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}
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if u, err := url.Parse(returnTo); err == nil {
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returnUrl = u
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}
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queryParams := returnUrl.Query()
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queryParams.Set("wgLoginState", "err") // by default, we set the state to error
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returnUrl.RawQuery = "" // remove potential query params
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returnParams = queryParams.Encode()
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}
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if currentSession.LoggedIn {
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if autoRedirect && e.isValidReturnUrl(returnTo) {
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queryParams := returnUrl.Query()
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queryParams.Set("wgLoginState", "success")
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returnParams = queryParams.Encode()
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redirectToReturn()
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} else {
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respond.JSON(w, http.StatusBadRequest,
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model.Error{Code: http.StatusBadRequest, Message: "already logged in"})
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}
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return
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}
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authCodeUrl, state, nonce, err := e.authService.OauthLoginStep1(context.Background(), provider)
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if err != nil {
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if autoRedirect && e.isValidReturnUrl(returnTo) {
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redirectToReturn()
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} else {
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respond.JSON(w, http.StatusInternalServerError,
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model.Error{Code: http.StatusInternalServerError, Message: err.Error()})
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}
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return
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}
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authSession := e.session.GetData(r.Context())
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authSession.OauthState = state
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authSession.OauthNonce = nonce
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authSession.OauthProvider = provider
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authSession.OauthReturnTo = returnTo
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e.session.SetData(r.Context(), authSession)
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if autoRedirect {
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respond.Redirect(w, r, http.StatusFound, authCodeUrl)
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} else {
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respond.JSON(w, http.StatusOK, model.OauthInitiationResponse{
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RedirectUrl: authCodeUrl,
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State: state,
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})
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}
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}
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}
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// handleOauthCallbackGet returns a gorm Handler function.
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//
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// @ID auth_handleOauthCallbackGet
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// @Tags Authentication
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// @Summary Handle the OAuth callback.
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// @Produce json
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// @Success 200 {object} []model.LoginProviderInfo
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// @Router /auth/{provider}/callback [get]
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func (e AuthEndpoint) handleOauthCallbackGet() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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currentSession := e.session.GetData(r.Context())
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var returnUrl *url.URL
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var returnParams string
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redirectToReturn := func() {
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respond.Redirect(w, r, http.StatusFound, returnUrl.String()+"?"+returnParams)
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}
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if currentSession.OauthReturnTo != "" {
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if u, err := url.Parse(currentSession.OauthReturnTo); err == nil {
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returnUrl = u
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}
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queryParams := returnUrl.Query()
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queryParams.Set("wgLoginState", "err") // by default, we set the state to error
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returnUrl.RawQuery = "" // remove potential query params
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returnParams = queryParams.Encode()
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}
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if currentSession.LoggedIn {
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if returnUrl != nil && e.isValidReturnUrl(returnUrl.String()) {
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queryParams := returnUrl.Query()
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queryParams.Set("wgLoginState", "success")
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returnParams = queryParams.Encode()
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redirectToReturn()
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} else {
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respond.JSON(w, http.StatusBadRequest, model.Error{Message: "already logged in"})
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}
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return
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}
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provider := request.Path(r, "provider")
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oauthCode := request.Query(r, "code")
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oauthState := request.Query(r, "state")
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if provider != currentSession.OauthProvider {
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if returnUrl != nil && e.isValidReturnUrl(returnUrl.String()) {
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redirectToReturn()
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} else {
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respond.JSON(w, http.StatusBadRequest,
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model.Error{Code: http.StatusBadRequest, Message: "invalid oauth provider"})
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}
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return
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}
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if oauthState != currentSession.OauthState {
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if returnUrl != nil && e.isValidReturnUrl(returnUrl.String()) {
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redirectToReturn()
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} else {
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respond.JSON(w, http.StatusBadRequest,
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model.Error{Code: http.StatusBadRequest, Message: "invalid oauth state"})
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}
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return
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}
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loginCtx, cancel := context.WithTimeout(context.Background(), 1000*time.Second)
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user, err := e.authService.OauthLoginStep2(loginCtx, provider, currentSession.OauthNonce,
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oauthCode)
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cancel()
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if err != nil {
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if returnUrl != nil && e.isValidReturnUrl(returnUrl.String()) {
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redirectToReturn()
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} else {
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respond.JSON(w, http.StatusUnauthorized,
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model.Error{Code: http.StatusUnauthorized, Message: err.Error()})
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}
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return
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}
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e.setAuthenticatedUser(r, user)
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if returnUrl != nil && e.isValidReturnUrl(returnUrl.String()) {
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queryParams := returnUrl.Query()
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queryParams.Set("wgLoginState", "success")
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returnParams = queryParams.Encode()
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redirectToReturn()
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} else {
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respond.JSON(w, http.StatusOK, user)
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}
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}
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}
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func (e AuthEndpoint) setAuthenticatedUser(r *http.Request, user *domain.User) {
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currentSession := e.session.GetData(r.Context())
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currentSession.LoggedIn = true
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currentSession.IsAdmin = user.IsAdmin
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currentSession.UserIdentifier = string(user.Identifier)
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currentSession.Firstname = user.Firstname
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currentSession.Lastname = user.Lastname
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currentSession.Email = user.Email
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currentSession.OauthState = ""
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currentSession.OauthNonce = ""
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currentSession.OauthProvider = ""
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currentSession.OauthReturnTo = ""
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e.session.SetData(r.Context(), currentSession)
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}
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// handleLoginPost returns a gorm Handler function.
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//
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// @ID auth_handleLoginPost
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// @Tags Authentication
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// @Summary Get all available external login providers.
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// @Produce json
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// @Success 200 {object} []model.LoginProviderInfo
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// @Router /auth/login [post]
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func (e AuthEndpoint) handleLoginPost() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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currentSession := e.session.GetData(r.Context())
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if currentSession.LoggedIn {
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respond.JSON(w, http.StatusOK, model.Error{Code: http.StatusOK, Message: "already logged in"})
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return
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}
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var loginData struct {
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Username string `json:"username" binding:"required,min=2"`
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Password string `json:"password" binding:"required,min=4"`
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}
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if err := request.BodyJson(r, &loginData); err != nil {
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respond.JSON(w, http.StatusBadRequest, model.Error{Code: http.StatusBadRequest, Message: err.Error()})
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return
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}
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if err := e.validate.Struct(loginData); err != nil {
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respond.JSON(w, http.StatusBadRequest, model.Error{Code: http.StatusBadRequest, Message: err.Error()})
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return
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}
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user, err := e.authService.PlainLogin(context.Background(), loginData.Username,
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loginData.Password)
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if err != nil {
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respond.JSON(w, http.StatusUnauthorized,
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model.Error{Code: http.StatusUnauthorized, Message: "login failed"})
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return
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}
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e.setAuthenticatedUser(r, user)
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respond.JSON(w, http.StatusOK, user)
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}
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}
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// handleLogoutPost returns a gorm Handler function.
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//
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// @ID auth_handleLogoutGet
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// @Tags Authentication
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// @Summary Get all available external login providers.
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// @Produce json
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// @Success 200 {object} []model.LoginProviderInfo
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// @Router /auth/logout [get]
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func (e AuthEndpoint) handleLogoutPost() http.HandlerFunc {
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return func(w http.ResponseWriter, r *http.Request) {
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currentSession := e.session.GetData(r.Context())
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if !currentSession.LoggedIn { // Not logged in
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respond.JSON(w, http.StatusOK, model.Error{Code: http.StatusOK, Message: "not logged in"})
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return
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}
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e.session.DestroyData(r.Context())
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respond.JSON(w, http.StatusOK, model.Error{Code: http.StatusOK, Message: "logout ok"})
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}
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}
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// isValidReturnUrl checks if the given return URL matches the configured external URL of the application.
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func (e AuthEndpoint) isValidReturnUrl(returnUrl string) bool {
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if !strings.HasPrefix(returnUrl, e.cfg.Web.ExternalUrl) {
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return false
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}
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return true
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}
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