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Add challenge manager interface

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Challenger manager interface is used to handle getting authorization challenges from an endpoint as well as extracting challenges from responses.

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
This commit is contained in:
Derek McGowan 2015-06-30 10:56:29 -07:00
parent 5a3a9c6a77
commit 376cc5fe75
3 changed files with 87 additions and 36 deletions
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53
docs/client/auth/authchallenge.go
View file

@ -1,7 +1,9 @@
package auth
import (
"fmt"
"net/http"
"net/url"
"strings"
)
@ -15,6 +17,57 @@ type Challenge struct {
Parameters map[string]string
}
// ChallengeManager manages the challenges for endpoints.
// The challenges are pulled out of HTTP responses. Only
// responses which expect challenges should be added to
// the manager, since a non-unauthorized request will be
// viewed as not requiring challenges.
type ChallengeManager interface {
// GetChallenges returns the challenges for the given
// endpoint URL.
GetChallenges(endpoint string) ([]Challenge, error)
// AddResponse adds the response to the challenge
// manager. The challenges will be parsed out of
// the WWW-Authenicate headers and added to the
// URL which was produced the response. If the
// response was authorized, any challenges for the
// endpoint will be cleared.
AddResponse(resp *http.Response) error
}
// NewSimpleChallengeManager returns an instance of
// ChallengeManger which only maps endpoints to challenges
// based on the responses which have been added the
// manager. The simple manager will make no attempt to
// perform requests on the endpoints or cache the responses
// to a backend.
func NewSimpleChallengeManager() ChallengeManager {
return simpleChallengeManager{}
}
type simpleChallengeManager map[string][]Challenge
func (m simpleChallengeManager) GetChallenges(endpoint string) ([]Challenge, error) {
challenges := m[endpoint]
return challenges, nil
}
func (m simpleChallengeManager) AddResponse(resp *http.Response) error {
challenges := ResponseChallenges(resp)
if resp.Request == nil {
return fmt.Errorf("missing request reference")
}
urlCopy := url.URL{
Path: resp.Request.URL.Path,
Host: resp.Request.URL.Host,
Scheme: resp.Request.URL.Scheme,
}
m[urlCopy.String()] = challenges
return nil
}
// Octet types from RFC 2616.
type octetType byte

28
docs/client/auth/session.go
View file

@ -36,15 +36,15 @@ type CredentialStore interface {
// schemes. The handlers are tried in order, the higher priority authentication
// methods should be first. The challengeMap holds a list of challenges for
// a given root API endpoint (for example "https://registry-1.docker.io/v2/").
func NewAuthorizer(challengeMap map[string][]Challenge, handlers ...AuthenticationHandler) transport.RequestModifier {
func NewAuthorizer(manager ChallengeManager, handlers ...AuthenticationHandler) transport.RequestModifier {
return &endpointAuthorizer{
challenges: challengeMap,
challenges: manager,
handlers: handlers,
}
}
type endpointAuthorizer struct {
challenges map[string][]Challenge
challenges ChallengeManager
handlers []AuthenticationHandler
transport http.RoundTripper
}
@ -63,18 +63,20 @@ func (ea *endpointAuthorizer) ModifyRequest(req *http.Request) error {
pingEndpoint := ping.String()
challenges, ok := ea.challenges[pingEndpoint]
if !ok {
return nil
challenges, err := ea.challenges.GetChallenges(pingEndpoint)
if err != nil {
return err
}
for _, handler := range ea.handlers {
for _, challenge := range challenges {
if challenge.Scheme != handler.Scheme() {
continue
}
if err := handler.AuthorizeRequest(req, challenge.Parameters); err != nil {
return err
if len(challenges) > 0 {
for _, handler := range ea.handlers {
for _, challenge := range challenges {
if challenge.Scheme != handler.Scheme() {
continue
}
if err := handler.AuthorizeRequest(req, challenge.Parameters); err != nil {
return err
}
}
}
}

42
docs/client/auth/session_test.go
View file

@ -56,14 +56,18 @@ func testServerWithAuth(rrm testutil.RequestResponseMap, authenticate string, au
// ping pings the provided endpoint to determine its required authorization challenges.
// If a version header is provided, the versions will be returned.
func ping(endpoint, versionHeader string) ([]Challenge, []APIVersion, error) {
func ping(manager ChallengeManager, endpoint, versionHeader string) ([]APIVersion, error) {
resp, err := http.Get(endpoint)
if err != nil {
return nil, nil, err
return nil, err
}
defer resp.Body.Close()
return ResponseChallenges(resp), APIVersions(resp, versionHeader), err
if err := manager.AddResponse(resp); err != nil {
return nil, err
}
return APIVersions(resp, versionHeader), err
}
type testCredentialStore struct {
@ -125,7 +129,8 @@ func TestEndpointAuthorizeToken(t *testing.T) {
e, c := testServerWithAuth(m, authenicate, validCheck)
defer c()
challenges1, versions, err := ping(e+"/v2/", "x-api-version")
challengeManager1 := NewSimpleChallengeManager()
versions, err := ping(challengeManager1, e+"/v2/", "x-api-version")
if err != nil {
t.Fatal(err)
}
@ -135,10 +140,7 @@ func TestEndpointAuthorizeToken(t *testing.T) {
if check := (APIVersion{Type: "registry", Version: "2.0"}); versions[0] != check {
t.Fatalf("Unexpected api version: %#v, expected %#v", versions[0], check)
}
challengeMap1 := map[string][]Challenge{
e + "/v2/": challenges1,
}
transport1 := transport.NewTransport(nil, NewAuthorizer(challengeMap1, NewTokenHandler(nil, nil, repo1, "pull", "push")))
transport1 := transport.NewTransport(nil, NewAuthorizer(challengeManager1, NewTokenHandler(nil, nil, repo1, "pull", "push")))
client := &http.Client{Transport: transport1}
req, _ := http.NewRequest("GET", e+"/v2/hello", nil)
@ -157,7 +159,8 @@ func TestEndpointAuthorizeToken(t *testing.T) {
e2, c2 := testServerWithAuth(m, authenicate, badCheck)
defer c2()
challenges2, versions, err := ping(e+"/v2/", "x-multi-api-version")
challengeManager2 := NewSimpleChallengeManager()
versions, err = ping(challengeManager2, e+"/v2/", "x-multi-api-version")
if err != nil {
t.Fatal(err)
}
@ -173,10 +176,7 @@ func TestEndpointAuthorizeToken(t *testing.T) {
if check := (APIVersion{Type: "trust", Version: "1.0"}); versions[2] != check {
t.Fatalf("Unexpected api version: %#v, expected %#v", versions[2], check)
}
challengeMap2 := map[string][]Challenge{
e + "/v2/": challenges2,
}
transport2 := transport.NewTransport(nil, NewAuthorizer(challengeMap2, NewTokenHandler(nil, nil, repo2, "pull", "push")))
transport2 := transport.NewTransport(nil, NewAuthorizer(challengeManager2, NewTokenHandler(nil, nil, repo2, "pull", "push")))
client2 := &http.Client{Transport: transport2}
req, _ = http.NewRequest("GET", e2+"/v2/hello", nil)
@ -246,14 +246,12 @@ func TestEndpointAuthorizeTokenBasic(t *testing.T) {
password: password,
}
challenges, _, err := ping(e+"/v2/", "")
challengeManager := NewSimpleChallengeManager()
_, err := ping(challengeManager, e+"/v2/", "")
if err != nil {
t.Fatal(err)
}
challengeMap := map[string][]Challenge{
e + "/v2/": challenges,
}
transport1 := transport.NewTransport(nil, NewAuthorizer(challengeMap, NewTokenHandler(nil, creds, repo, "pull", "push"), NewBasicHandler(creds)))
transport1 := transport.NewTransport(nil, NewAuthorizer(challengeManager, NewTokenHandler(nil, creds, repo, "pull", "push"), NewBasicHandler(creds)))
client := &http.Client{Transport: transport1}
req, _ := http.NewRequest("GET", e+"/v2/hello", nil)
@ -293,14 +291,12 @@ func TestEndpointAuthorizeBasic(t *testing.T) {
password: password,
}
challenges, _, err := ping(e+"/v2/", "")
challengeManager := NewSimpleChallengeManager()
_, err := ping(challengeManager, e+"/v2/", "")
if err != nil {
t.Fatal(err)
}
challengeMap := map[string][]Challenge{
e + "/v2/": challenges,
}
transport1 := transport.NewTransport(nil, NewAuthorizer(challengeMap, NewBasicHandler(creds)))
transport1 := transport.NewTransport(nil, NewAuthorizer(challengeManager, NewBasicHandler(creds)))
client := &http.Client{Transport: transport1}
req, _ := http.NewRequest("GET", e+"/v2/hello", nil)