k3s/pkg/server/auth.go
Brad Davidson 6e768c301e Use appropriate response codes for authn/authz failures
Signed-off-by: Brad Davidson <brad.davidson@rancher.com>
2021-02-09 16:28:20 -08:00

59 lines
1.5 KiB
Go

package server
import (
"net/http"
"github.com/gorilla/mux"
"github.com/rancher/k3s/pkg/daemons/config"
"github.com/sirupsen/logrus"
"k8s.io/apiserver/pkg/endpoints/request"
)
func hasRole(mustRoles []string, roles []string) bool {
for _, check := range roles {
for _, role := range mustRoles {
if role == check {
return true
}
}
}
return false
}
func doAuth(roles []string, serverConfig *config.Control, next http.Handler, rw http.ResponseWriter, req *http.Request) {
switch {
case serverConfig == nil:
logrus.Errorf("Authenticate not initialized: serverConfig is nil")
rw.WriteHeader(http.StatusUnauthorized)
return
case serverConfig.Runtime.Authenticator == nil:
logrus.Errorf("Authenticate not initialized: serverConfig.Runtime.Authenticator is nil")
rw.WriteHeader(http.StatusUnauthorized)
return
}
resp, ok, err := serverConfig.Runtime.Authenticator.AuthenticateRequest(req)
if err != nil {
logrus.Errorf("Failed to authenticate request from %s: %v", req.RemoteAddr, err)
rw.WriteHeader(http.StatusUnauthorized)
return
}
if !ok || !hasRole(roles, resp.User.GetGroups()) {
rw.WriteHeader(http.StatusForbidden)
return
}
ctx := request.WithUser(req.Context(), resp.User)
req = req.WithContext(ctx)
next.ServeHTTP(rw, req)
}
func authMiddleware(serverConfig *config.Control, roles ...string) mux.MiddlewareFunc {
return func(next http.Handler) http.Handler {
return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
doAuth(roles, serverConfig, next, rw, req)
})
}
}