bouncer/internal/proxy/director/layer/authn/layer.go

104 lines
2.7 KiB
Go

package authn
import (
"net/http"
"forge.cadoles.com/Cadoles/go-proxy"
"forge.cadoles.com/Cadoles/go-proxy/wildcard"
"forge.cadoles.com/cadoles/bouncer/internal/proxy/director"
"forge.cadoles.com/cadoles/bouncer/internal/store"
"github.com/pkg/errors"
"gitlab.com/wpetit/goweb/logger"
)
type Layer struct {
layerType store.LayerType
auth Authenticator
}
func (l *Layer) Middleware(layer *store.Layer) proxy.Middleware {
return func(next http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
options, err := fromStoreOptions(layer.Options)
if err != nil {
logger.Error(ctx, "could not parse layer options", logger.E(errors.WithStack(err)))
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
if preAuth, ok := l.auth.(PreAuthentication); ok {
if err := preAuth.PreAuthentication(w, r, layer); err != nil {
if errors.Is(err, ErrSkipRequest) {
return
}
logger.Error(ctx, "could not execute pre-auth hook", logger.E(errors.WithStack(err)))
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
}
matches := wildcard.MatchAny(r.URL.String(), options.MatchURLs...)
if !matches {
next.ServeHTTP(w, r)
return
}
user, err := l.auth.Authenticate(w, r, layer)
if err != nil {
if errors.Is(err, ErrSkipRequest) {
return
}
logger.Error(ctx, "could not authenticate user", logger.E(errors.WithStack(err)))
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
if err := l.injectHeaders(r, options, user); err != nil {
logger.Error(ctx, "could not inject headers", logger.E(errors.WithStack(err)))
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
if postAuth, ok := l.auth.(PostAuthentication); ok {
if err := postAuth.PostAuthentication(w, r, layer, user); err != nil {
if errors.Is(err, ErrSkipRequest) {
return
}
logger.Error(ctx, "could not execute post-auth hook", logger.E(errors.WithStack(err)))
http.Error(w, http.StatusText(http.StatusInternalServerError), http.StatusInternalServerError)
return
}
}
next.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
}
// LayerType implements director.MiddlewareLayer
func (l *Layer) LayerType() store.LayerType {
return l.layerType
}
func NewLayer(layerType store.LayerType, auth Authenticator) *Layer {
return &Layer{
layerType: layerType,
auth: auth,
}
}
var _ director.MiddlewareLayer = &Layer{}