145 lines
3.1 KiB
Go
145 lines
3.1 KiB
Go
package auth
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import (
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"encoding/hex"
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"errors"
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"io"
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"net/http"
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"github.com/google/uuid"
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"github.com/labstack/echo/v4"
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"github.com/rs/zerolog/log"
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"dynatron.me/x/blasphem/pkg/frontend"
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"dynatron.me/x/blasphem/pkg/storage"
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)
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var (
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ErrInvalidAuth = errors.New("invalid auth")
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ErrInvalidHandler = errors.New("no such handler")
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)
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type Authenticator struct {
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flows FlowStore
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sessions SessionStore
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providers map[string]AuthProvider
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}
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func (a *Authenticator) InstallRoutes(e *echo.Echo) {
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authG := e.Group("/auth")
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authG.GET("/authorize", a.AuthorizeHandler)
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authG.GET("/providers", a.ProvidersHandler)
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authG.POST("/token", a.TokenHandler)
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authG.POST("/login_flow", a.BeginLoginFlowHandler)
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loginFlow := authG.Group("/login_flow") // TODO: add IP address affinity middleware
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loginFlow.POST("/:flow_id", a.LoginFlowHandler)
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loginFlow.DELETE("/:flow_id", a.LoginFlowDeleteHandler)
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}
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func (a *Authenticator) Provider(name string) AuthProvider {
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p, ok := a.providers[name]
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if !ok {
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return nil
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}
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return p
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}
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func (a *Authenticator) InitAuth(s storage.Store) error {
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a.flows = make(FlowStore)
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a.sessions.init()
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hap, err := NewHAProvider(s)
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if err != nil {
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return err
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}
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// XXX: yuck
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a.providers = map[string]AuthProvider{
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hap.ProviderType(): hap,
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}
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return nil
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}
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type AuthProvider interface { // TODO: this should include stepping
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ProviderName() string
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ProviderID() *string
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ProviderType() string
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ProviderBase() AuthProviderBase
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FlowSchema() []FlowSchemaItem
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ValidateCreds(reqMap map[string]interface{}) bool
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}
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type AuthProviderBase struct {
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Name string `json:"name"`
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ID *string `json:"id"`
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Type string `json:"type"`
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}
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func (bp *AuthProviderBase) ProviderName() string { return bp.Name }
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func (bp *AuthProviderBase) ProviderID() *string { return bp.ID }
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func (bp *AuthProviderBase) ProviderType() string { return bp.Type }
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func (bp *AuthProviderBase) ProviderBase() AuthProviderBase { return *bp }
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var HomeAssistant = "homeassistant"
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// TODO: make this configurable
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func (a *Authenticator) ProvidersHandler(c echo.Context) error {
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providers := []AuthProviderBase{
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a.Provider(HomeAssistant).ProviderBase(),
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}
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return c.JSON(http.StatusOK, providers)
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}
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func (s *Authenticator) AuthorizeHandler(c echo.Context) error {
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authContents, err := frontend.RootFS.Open("authorize.html")
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if err != nil {
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return err
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}
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defer authContents.Close()
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b, err := io.ReadAll(authContents)
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if err != nil {
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return err
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}
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return c.HTML(http.StatusOK, string(b))
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}
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func (a *Authenticator) Check(f *Flow, rm map[string]interface{}) error {
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cID, hasCID := rm["client_id"]
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if !hasCID || cID != f.request.ClientID {
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return ErrInvalidAuth
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}
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for _, h := range f.Handler {
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if h == nil {
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return ErrInvalidHandler
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}
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p := a.Provider(*h)
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if p == nil {
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return ErrInvalidAuth
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}
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success := p.ValidateCreds(rm)
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if success {
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log.Info().Str("user", rm["username"].(string)).Msg("Login success")
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return nil
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}
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}
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return ErrInvalidAuth
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}
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func genUUID() string {
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// must be addressable
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u := uuid.New()
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return hex.EncodeToString(u[:])
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}
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