mirror of https://github.com/k3s-io/k3s.git
80 lines
2.5 KiB
Go
80 lines
2.5 KiB
Go
package auth
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import (
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"net"
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"net/http"
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"github.com/gorilla/mux"
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"github.com/k3s-io/k3s/pkg/daemons/config"
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"github.com/k3s-io/k3s/pkg/util"
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"github.com/pkg/errors"
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"github.com/sirupsen/logrus"
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"k8s.io/apiserver/pkg/endpoints/request"
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)
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func hasRole(mustRoles []string, roles []string) bool {
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for _, check := range roles {
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for _, role := range mustRoles {
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if role == check {
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return true
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}
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}
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}
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return false
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}
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// doAuth calls the cluster's authenticator to validate that the client has at least one of the listed roles
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func doAuth(roles []string, serverConfig *config.Control, next http.Handler, rw http.ResponseWriter, req *http.Request) {
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switch {
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case serverConfig == nil:
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logrus.Errorf("Authenticate not initialized: serverConfig is nil")
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util.SendError(errors.New("not authorized"), rw, req, http.StatusUnauthorized)
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return
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case serverConfig.Runtime.Authenticator == nil:
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logrus.Errorf("Authenticate not initialized: serverConfig.Runtime.Authenticator is nil")
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util.SendError(errors.New("not authorized"), rw, req, http.StatusUnauthorized)
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return
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}
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resp, ok, err := serverConfig.Runtime.Authenticator.AuthenticateRequest(req)
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if err != nil {
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logrus.Errorf("Failed to authenticate request from %s: %v", req.RemoteAddr, err)
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util.SendError(errors.New("not authorized"), rw, req, http.StatusUnauthorized)
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return
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}
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if !ok || !hasRole(roles, resp.User.GetGroups()) {
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util.SendError(errors.New("forbidden"), rw, req, http.StatusForbidden)
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return
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}
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ctx := request.WithUser(req.Context(), resp.User)
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req = req.WithContext(ctx)
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next.ServeHTTP(rw, req)
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}
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// HasRole returns a middleware function that validates that the request
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// is being made with at least one of the listed roles.
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func HasRole(serverConfig *config.Control, roles ...string) mux.MiddlewareFunc {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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doAuth(roles, serverConfig, next, rw, req)
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})
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}
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}
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// IsLocalOrHasRole returns a middleware function that validates that the request
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// is from a local client or has at least one of the listed roles.
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func IsLocalOrHasRole(serverConfig *config.Control, roles ...string) mux.MiddlewareFunc {
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return func(next http.Handler) http.Handler {
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return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) {
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client, _, _ := net.SplitHostPort(req.RemoteAddr)
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if client == "127.0.0.1" || client == "::1" {
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next.ServeHTTP(rw, req)
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} else {
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doAuth(roles, serverConfig, next, rw, req)
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}
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})
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}
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}
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