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docker_cli_authz_unix_test.go
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docker_cli_authz_unix_test.go
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// +build !windows
package main
import (
"encoding/json"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"os"
"strings"
"github.com/docker/docker/pkg/authorization"
"github.com/docker/docker/pkg/integration/checker"
"github.com/docker/docker/pkg/plugins"
"github.com/go-check/check"
)
const (
testAuthZPlugin = "authzplugin"
unauthorizedMessage = "User unauthorized authz plugin"
errorMessage = "something went wrong..."
containerListAPI = "/containers/json"
)
func init() {
check.Suite(&DockerAuthzSuite{
ds: &DockerSuite{},
})
}
type DockerAuthzSuite struct {
server *httptest.Server
ds *DockerSuite
d *Daemon
ctrl *authorizationController
}
type authorizationController struct {
reqRes authorization.Response // reqRes holds the plugin response to the initial client request
resRes authorization.Response // resRes holds the plugin response to the daemon response
psRequestCnt int // psRequestCnt counts the number of calls to list container request api
psResponseCnt int // psResponseCnt counts the number of calls to list containers response API
requestsURIs []string // requestsURIs stores all request URIs that are sent to the authorization controller
}
func (s *DockerAuthzSuite) SetUpTest(c *check.C) {
s.d = NewDaemon(c)
s.ctrl = &authorizationController{}
}
func (s *DockerAuthzSuite) TearDownTest(c *check.C) {
s.d.Stop()
s.ds.TearDownTest(c)
s.ctrl = nil
}
func (s *DockerAuthzSuite) SetUpSuite(c *check.C) {
mux := http.NewServeMux()
s.server = httptest.NewServer(mux)
c.Assert(s.server, check.NotNil, check.Commentf("Failed to start a HTTP Server"))
mux.HandleFunc("/Plugin.Activate", func(w http.ResponseWriter, r *http.Request) {
b, err := json.Marshal(plugins.Manifest{Implements: []string{authorization.AuthZApiImplements}})
c.Assert(err, check.IsNil)
w.Write(b)
})
mux.HandleFunc("/AuthZPlugin.AuthZReq", func(w http.ResponseWriter, r *http.Request) {
if s.ctrl.reqRes.Err != "" {
w.WriteHeader(http.StatusInternalServerError)
}
b, err := json.Marshal(s.ctrl.reqRes)
c.Assert(err, check.IsNil)
w.Write(b)
defer r.Body.Close()
body, err := ioutil.ReadAll(r.Body)
c.Assert(err, check.IsNil)
authReq := authorization.Request{}
err = json.Unmarshal(body, &authReq)
c.Assert(err, check.IsNil)
assertBody(c, authReq.RequestURI, authReq.RequestHeaders, authReq.RequestBody)
assertAuthHeaders(c, authReq.RequestHeaders)
// Count only container list api
if strings.HasSuffix(authReq.RequestURI, containerListAPI) {
s.ctrl.psRequestCnt++
}
s.ctrl.requestsURIs = append(s.ctrl.requestsURIs, authReq.RequestURI)
})
mux.HandleFunc("/AuthZPlugin.AuthZRes", func(w http.ResponseWriter, r *http.Request) {
if s.ctrl.resRes.Err != "" {
w.WriteHeader(http.StatusInternalServerError)
}
b, err := json.Marshal(s.ctrl.resRes)
c.Assert(err, check.IsNil)
w.Write(b)
defer r.Body.Close()
body, err := ioutil.ReadAll(r.Body)
c.Assert(err, check.IsNil)
authReq := authorization.Request{}
err = json.Unmarshal(body, &authReq)
c.Assert(err, check.IsNil)
assertBody(c, authReq.RequestURI, authReq.ResponseHeaders, authReq.ResponseBody)
assertAuthHeaders(c, authReq.ResponseHeaders)
// Count only container list api
if strings.HasSuffix(authReq.RequestURI, containerListAPI) {
s.ctrl.psResponseCnt++
}
})
err := os.MkdirAll("/etc/docker/plugins", 0755)
c.Assert(err, checker.IsNil)
fileName := fmt.Sprintf("/etc/docker/plugins/%s.spec", testAuthZPlugin)
err = ioutil.WriteFile(fileName, []byte(s.server.URL), 0644)
c.Assert(err, checker.IsNil)
}
// assertAuthHeaders validates authentication headers are removed
func assertAuthHeaders(c *check.C, headers map[string]string) error {
for k := range headers {
if strings.Contains(strings.ToLower(k), "auth") || strings.Contains(strings.ToLower(k), "x-registry") {
c.Errorf("Found authentication headers in request '%v'", headers)
}
}
return nil
}
// assertBody asserts that body is removed for non text/json requests
func assertBody(c *check.C, requestURI string, headers map[string]string, body []byte) {
if strings.Contains(strings.ToLower(requestURI), "auth") && len(body) > 0 {
//return fmt.Errorf("Body included for authentication endpoint %s", string(body))
c.Errorf("Body included for authentication endpoint %s", string(body))
}
for k, v := range headers {
if strings.EqualFold(k, "Content-Type") && strings.HasPrefix(v, "text/") || v == "application/json" {
return
}
}
if len(body) > 0 {
c.Errorf("Body included while it should not (Headers: '%v')", headers)
}
}
func (s *DockerAuthzSuite) TearDownSuite(c *check.C) {
if s.server == nil {
return
}
s.server.Close()
err := os.RemoveAll("/etc/docker/plugins")
c.Assert(err, checker.IsNil)
}
func (s *DockerAuthzSuite) TestAuthZPluginAllowRequest(c *check.C) {
// start the daemon and load busybox, --net=none build fails otherwise
// cause it needs to pull busybox
c.Assert(s.d.StartWithBusybox(), check.IsNil)
// restart the daemon and enable the plugin, otherwise busybox loading
// is blocked by the plugin itself
c.Assert(s.d.Restart("--authz-plugin="+testAuthZPlugin), check.IsNil)
s.ctrl.reqRes.Allow = true
s.ctrl.resRes.Allow = true
// Ensure command successful
out, err := s.d.Cmd("run", "-d", "busybox", "top")
c.Assert(err, check.IsNil)
id := strings.TrimSpace(out)
assertURIRecorded(c, s.ctrl.requestsURIs, "/containers/create")
assertURIRecorded(c, s.ctrl.requestsURIs, fmt.Sprintf("/containers/%s/start", id))
out, err = s.d.Cmd("ps")
c.Assert(err, check.IsNil)
c.Assert(assertContainerList(out, []string{id}), check.Equals, true)
c.Assert(s.ctrl.psRequestCnt, check.Equals, 1)
c.Assert(s.ctrl.psResponseCnt, check.Equals, 1)
}
func (s *DockerAuthzSuite) TestAuthZPluginDenyRequest(c *check.C) {
err := s.d.Start("--authz-plugin=" + testAuthZPlugin)
c.Assert(err, check.IsNil)
s.ctrl.reqRes.Allow = false
s.ctrl.reqRes.Msg = unauthorizedMessage
// Ensure command is blocked
res, err := s.d.Cmd("ps")
c.Assert(err, check.NotNil)
c.Assert(s.ctrl.psRequestCnt, check.Equals, 1)
c.Assert(s.ctrl.psResponseCnt, check.Equals, 0)
// Ensure unauthorized message appears in response
c.Assert(res, check.Equals, fmt.Sprintf("Error response from daemon: authorization denied by plugin %s: %s\n", testAuthZPlugin, unauthorizedMessage))
}
func (s *DockerAuthzSuite) TestAuthZPluginDenyResponse(c *check.C) {
err := s.d.Start("--authz-plugin=" + testAuthZPlugin)
c.Assert(err, check.IsNil)
s.ctrl.reqRes.Allow = true
s.ctrl.resRes.Allow = false
s.ctrl.resRes.Msg = unauthorizedMessage
// Ensure command is blocked
res, err := s.d.Cmd("ps")
c.Assert(err, check.NotNil)
c.Assert(s.ctrl.psRequestCnt, check.Equals, 1)
c.Assert(s.ctrl.psResponseCnt, check.Equals, 1)
// Ensure unauthorized message appears in response
c.Assert(res, check.Equals, fmt.Sprintf("Error response from daemon: authorization denied by plugin %s: %s\n", testAuthZPlugin, unauthorizedMessage))
}
func (s *DockerAuthzSuite) TestAuthZPluginErrorResponse(c *check.C) {
err := s.d.Start("--authz-plugin=" + testAuthZPlugin)
c.Assert(err, check.IsNil)
s.ctrl.reqRes.Allow = true
s.ctrl.resRes.Err = errorMessage
// Ensure command is blocked
res, err := s.d.Cmd("ps")
c.Assert(err, check.NotNil)
c.Assert(res, check.Equals, fmt.Sprintf("Error response from daemon: plugin %s failed with error: %s: %s\n", testAuthZPlugin, authorization.AuthZApiResponse, errorMessage))
}
func (s *DockerAuthzSuite) TestAuthZPluginErrorRequest(c *check.C) {
err := s.d.Start("--authz-plugin=" + testAuthZPlugin)
c.Assert(err, check.IsNil)
s.ctrl.reqRes.Err = errorMessage
// Ensure command is blocked
res, err := s.d.Cmd("ps")
c.Assert(err, check.NotNil)
c.Assert(res, check.Equals, fmt.Sprintf("Error response from daemon: plugin %s failed with error: %s: %s\n", testAuthZPlugin, authorization.AuthZApiRequest, errorMessage))
}
func (s *DockerAuthzSuite) TestAuthZPluginEnsureNoDuplicatePluginRegistration(c *check.C) {
c.Assert(s.d.Start("--authz-plugin="+testAuthZPlugin, "--authz-plugin="+testAuthZPlugin), check.IsNil)
s.ctrl.reqRes.Allow = true
s.ctrl.resRes.Allow = true
out, err := s.d.Cmd("ps")
c.Assert(err, check.IsNil, check.Commentf(out))
// assert plugin is only called once..
c.Assert(s.ctrl.psRequestCnt, check.Equals, 1)
c.Assert(s.ctrl.psResponseCnt, check.Equals, 1)
}
// assertURIRecorded verifies that the given URI was sent and recorded in the authz plugin
func assertURIRecorded(c *check.C, uris []string, uri string) {
var found bool
for _, u := range uris {
if strings.Contains(u, uri) {
found = true
break
}
}
if !found {
c.Fatalf("Expected to find URI '%s', recorded uris '%s'", uri, strings.Join(uris, ","))
}
}