fixes for token endpoint

example/client/app/app.go

@@ -38,7 +38,7 @@ func main() {
 	// cookieHandler := utils.NewCookieHandler(hashKey, nil, utils.WithUnsecure())
 	provider, err := rp.NewDefaultRP(rpConfig) //, rp.WithCookieHandler(cookieHandler))
 	if err != nil {
-		logrus.Panic("error creating provider")
+		logrus.Panicf("error creating provider %s", err.Error())
 	}
 
 	// state := "foobar"

example/internal/mock/storage.go

@@ -36,6 +36,7 @@ type AuthRequest struct {
 	RedirectURI   string
 	Nonce         string
 	ClientID      string
+	CodeChallenge *oidc.CodeChallenge
 }
 
 func (a *AuthRequest) GetACR() string {
@@ -66,6 +67,10 @@ func (a *AuthRequest) GetCode() string {
 	return "code"
 }
 
+func (a *AuthRequest) GetCodeChallenge() *oidc.CodeChallenge {
+	return a.CodeChallenge
+}
+
 func (a *AuthRequest) GetID() string {
 	return a.ID
 }
@@ -105,38 +110,23 @@ var (
 
 func (s *AuthStorage) CreateAuthRequest(authReq *oidc.AuthRequest) (op.AuthRequest, error) {
 	a = &AuthRequest{ID: "id", ClientID: authReq.ClientID, ResponseType: authReq.ResponseType, Nonce: authReq.Nonce, RedirectURI: authReq.RedirectURI}
+	if authReq.CodeChallenge != "" {
+		a.CodeChallenge = &oidc.CodeChallenge{
+			Challenge: authReq.CodeChallenge,
+			Method:    authReq.CodeChallengeMethod,
+		}
+	}
 	return a, nil
 }
-func (s *OPStorage) GetClientByClientID(id string) (op.Client, error) {
+func (s *AuthStorage) AuthRequestByCode(string) (op.AuthRequest, error) {
-	if id == "none" {
-		return nil, errors.New("not found")
-	}
-	var appType op.ApplicationType
-	if id == "web" {
-		appType = op.ApplicationTypeWeb
-	} else if id == "native" {
-		appType = op.ApplicationTypeNative
-	} else {
-		appType = op.ApplicationTypeUserAgent
-	}
-	return &ConfClient{applicationType: appType}, nil
-}
-func (s *AuthStorage) AuthRequestByCode(op.Client, string, string) (op.AuthRequest, error) {
 	return a, nil
 }
-func (s *OPStorage) AuthorizeClientIDSecret(string, string) (op.Client, error) {
-	return &ConfClient{}, nil
-}
-func (s *OPStorage) AuthorizeClientIDCodeVerifier(string, string) (op.Client, error) {
-	return &ConfClient{}, nil
-}
 func (s *AuthStorage) DeleteAuthRequestAndCode(string, string) error {
 	return nil
 }
 func (s *AuthStorage) AuthRequestByID(id string) (op.AuthRequest, error) {
 	return a, nil
 }
-
 func (s *AuthStorage) GetSigningKey() (*jose.SigningKey, error) {
 	return &jose.SigningKey{Algorithm: jose.RS256, Key: s.key}, nil
 }
@@ -152,9 +142,30 @@ func (s *AuthStorage) GetKeySet() (*jose.JSONWebKeySet, error) {
 	}, nil
 }
 
-func (s *OPStorage) GetUserinfoFromScopes([]string) (interface{}, error) {
+func (s *OPStorage) GetClientByClientID(id string) (op.Client, error) {
-	return &oidc.Test{
+	if id == "none" {
-		Userinfo: oidc.Userinfo{
+		return nil, errors.New("not found")
+	}
+	var appType op.ApplicationType
+	var authMethod op.AuthMethod
+	if id == "web" {
+		appType = op.ApplicationTypeWeb
+		authMethod = op.AuthMethodBasic
+	} else if id == "native" {
+		appType = op.ApplicationTypeNative
+		authMethod = op.AuthMethodNone
+	} else {
+		appType = op.ApplicationTypeUserAgent
+		authMethod = op.AuthMethodNone
+	}
+	return &ConfClient{ID: id, applicationType: appType, authMethod: authMethod}, nil
+}
+
+func (s *OPStorage) AuthorizeClientIDSecret(id string, _ string) error {
+	return nil
+}
+func (s *OPStorage) GetUserinfoFromScopes([]string) (*oidc.Userinfo, error) {
+	return &oidc.Userinfo{
 		Subject: a.GetSubject(),
 		Address: &oidc.UserinfoAddress{
 			StreetAddress: "Hjkhkj 789\ndsf",
@@ -174,31 +185,18 @@ func (s *OPStorage) GetUserinfoFromScopes([]string) (interface{}, error) {
 		// 	"test": "test",
 		// 	"hkjh": "",
 		// },
-		},
-		Add: "jkhnkj",
 	}, nil
 }
 
-type info struct {
-	Subject string
-}
-
-func (i *info) GetSubject() string {
-	return i.Subject
-}
-
-func (i *info) Claims() map[string]interface{} {
-	return map[string]interface{}{
-		"hodor":        "hoidoir",
-		"email":        "asdfd",
-		"emailVerfied": true,
-	}
-}
-
 type ConfClient struct {
 	applicationType op.ApplicationType
+	authMethod      op.AuthMethod
+	ID              string
 }
 
+func (c *ConfClient) GetID() string {
+	return c.ID
+}
 func (c *ConfClient) RedirectURIs() []string {
 	return []string{
 		"https://registered.com/callback",
@@ -218,3 +216,7 @@ func (c *ConfClient) LoginURL(id string) string {
 func (c *ConfClient) ApplicationType() op.ApplicationType {
 	return c.applicationType
 }
+
+func (c *ConfClient) GetAuthMethod() op.AuthMethod {
+	return c.authMethod
+}

pkg/oidc/authorization.go

@@ -58,6 +58,9 @@ type AuthRequest struct {
 	IDTokenHint string   `schema:"id_token_hint"`
 	LoginHint   string   `schema:"login_hint"`
 	ACRValues   []string `schema:"acr_values"`
+
+	CodeChallenge       string              `schema:"code_challenge"`
+	CodeChallengeMethod CodeChallengeMethod `schema:"code_challenge_method"`
 }
 
 // func (a *AuthRequest) GetID() string {

pkg/op/client.go

@@ -10,6 +10,7 @@ type Client interface {
 	GetID() string
 	RedirectURIs() []string
 	ApplicationType() ApplicationType
+	GetAuthMethod() AuthMethod
 	LoginURL(string) string
 }
 
@@ -18,3 +19,5 @@ func IsConfidentialType(c Client) bool {
 }
 
 type ApplicationType int
+
+type AuthMethod string

pkg/op/default_op.go

@@ -16,8 +16,9 @@ const (
 	defaultUserinfoEndpoint      = "userinfo"
 	defaultKeysEndpoint          = "keys"
 
-	AuthMethodBasic = "client_secret_basic"
+	AuthMethodBasic AuthMethod = "client_secret_basic"
 	AuthMethodPost             = "client_secret_post"
+	AuthMethodNone             = "none"
 
 	DefaultIDTokenValidity = time.Duration(5 * time.Minute)
 )

pkg/op/discovery.go

@@ -110,10 +110,10 @@ func SubjectTypes(c Configuration) []string {
 
 func AuthMethods(c Configuration) []string {
 	authMethods := []string{
-		AuthMethodBasic,
+		string(AuthMethodBasic),
 	}
 	if c.AuthMethodPostSupported() {
-		authMethods = append(authMethods, AuthMethodPost)
+		authMethods = append(authMethods, string(AuthMethodPost))
 	}
 	return authMethods
 }

pkg/op/discovery_test.go

@@ -214,7 +214,7 @@ func Test_AuthMethods(t *testing.T) {
 				m.EXPECT().AuthMethodPostSupported().Return(false)
 				return m
 			}()},
-			[]string{op.AuthMethodBasic},
+			[]string{string(op.AuthMethodBasic)},
 		},
 		{
 			"basic and post",
@@ -222,7 +222,7 @@ func Test_AuthMethods(t *testing.T) {
 				m.EXPECT().AuthMethodPostSupported().Return(true)
 				return m
 			}()},
-			[]string{op.AuthMethodBasic, op.AuthMethodPost},
+			[]string{string(op.AuthMethodBasic), string(op.AuthMethodPost)},
 		},
 	}
 	for _, tt := range tests {

pkg/op/mock/client.mock.go

@@ -47,6 +47,20 @@ func (mr *MockClientMockRecorder) ApplicationType() *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ApplicationType", reflect.TypeOf((*MockClient)(nil).ApplicationType))
 }
 
+// GetAuthMethod mocks base method
+func (m *MockClient) GetAuthMethod() op.AuthMethod {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "GetAuthMethod")
+	ret0, _ := ret[0].(op.AuthMethod)
+	return ret0
+}
+
+// GetAuthMethod indicates an expected call of GetAuthMethod
+func (mr *MockClientMockRecorder) GetAuthMethod() *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetAuthMethod", reflect.TypeOf((*MockClient)(nil).GetAuthMethod))
+}
+
 // GetID mocks base method
 func (m *MockClient) GetID() string {
 	m.ctrl.T.Helper()

pkg/op/mock/storage.mock.go

@@ -65,28 +65,12 @@ func (mr *MockStorageMockRecorder) AuthRequestByID(arg0 interface{}) *gomock.Cal
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AuthRequestByID", reflect.TypeOf((*MockStorage)(nil).AuthRequestByID), arg0)
 }
 
-// AuthorizeClientIDCodeVerifier mocks base method
-func (m *MockStorage) AuthorizeClientIDCodeVerifier(arg0, arg1 string) (op.Client, error) {
-	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "AuthorizeClientIDCodeVerifier", arg0, arg1)
-	ret0, _ := ret[0].(op.Client)
-	ret1, _ := ret[1].(error)
-	return ret0, ret1
-}
-
-// AuthorizeClientIDCodeVerifier indicates an expected call of AuthorizeClientIDCodeVerifier
-func (mr *MockStorageMockRecorder) AuthorizeClientIDCodeVerifier(arg0, arg1 interface{}) *gomock.Call {
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "AuthorizeClientIDCodeVerifier", reflect.TypeOf((*MockStorage)(nil).AuthorizeClientIDCodeVerifier), arg0, arg1)
-}
-
 // AuthorizeClientIDSecret mocks base method
-func (m *MockStorage) AuthorizeClientIDSecret(arg0, arg1 string) (op.Client, error) {
+func (m *MockStorage) AuthorizeClientIDSecret(arg0, arg1 string) error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "AuthorizeClientIDSecret", arg0, arg1)
-	ret0, _ := ret[0].(op.Client)
+	ret0, _ := ret[0].(error)
-	ret1, _ := ret[1].(error)
+	return ret0
-	return ret0, ret1
 }
 
 // AuthorizeClientIDSecret indicates an expected call of AuthorizeClientIDSecret

pkg/op/mock/storage.mock.impl.go

@@ -31,7 +31,7 @@ func NewMockStorageAny(t *testing.T) op.Storage {
 	m := NewStorage(t)
 	mockS := m.(*MockStorage)
 	mockS.EXPECT().GetClientByClientID(gomock.Any()).AnyTimes().Return(&ConfClient{}, nil)
-	mockS.EXPECT().AuthorizeClientIDSecret(gomock.Any(), gomock.Any()).AnyTimes().Return(&ConfClient{}, nil)
+	mockS.EXPECT().AuthorizeClientIDSecret(gomock.Any(), gomock.Any()).AnyTimes().Return(nil)
 	return m
 }
 
@@ -62,15 +62,19 @@ func ExpectValidClientID(s op.Storage) {
 	mockS.EXPECT().GetClientByClientID(gomock.Any()).DoAndReturn(
 		func(id string) (op.Client, error) {
 			var appType op.ApplicationType
+			var authMethod op.AuthMethod
 			switch id {
 			case "web_client":
 				appType = op.ApplicationTypeWeb
+				authMethod = op.AuthMethodBasic
 			case "native_client":
 				appType = op.ApplicationTypeNative
+				authMethod = op.AuthMethodNone
 			case "useragent_client":
 				appType = op.ApplicationTypeUserAgent
+				authMethod = op.AuthMethodBasic
 			}
-			return &ConfClient{appType: appType}, nil
+			return &ConfClient{id: id, appType: appType, authMethod: authMethod}, nil
 		})
 }
 
@@ -90,7 +94,9 @@ func ExpectSigningKey(s op.Storage) {
 }
 
 type ConfClient struct {
+	id         string
 	appType    op.ApplicationType
+	authMethod op.AuthMethod
 }
 
 func (c *ConfClient) RedirectURIs() []string {
@@ -109,3 +115,11 @@ func (c *ConfClient) LoginURL(id string) string {
 func (c *ConfClient) ApplicationType() op.ApplicationType {
 	return c.appType
 }
+
+func (c *ConfClient) GetAuthMethod() op.AuthMethod {
+	return c.authMethod
+}
+
+func (c *ConfClient) GetID() string {
+	return c.id
+}

pkg/op/storage.go

@@ -20,8 +20,7 @@ type AuthStorage interface {
 
 type OPStorage interface {
 	GetClientByClientID(string) (Client, error)
-	AuthorizeClientIDSecret(string, string) (Client, error)
+	AuthorizeClientIDSecret(string, string) error
-	AuthorizeClientIDCodeVerifier(string, string) (Client, error)
 	GetUserinfoFromScopes([]string) (*oidc.Userinfo, error)
 }
 

pkg/op/tokenrequest.go

@@ -22,38 +22,21 @@ type Exchanger interface {
 }
 
 func CodeExchange(w http.ResponseWriter, r *http.Request, exchanger Exchanger) {
-	err := r.ParseForm()
+	tokenReq, err := ParseAccessTokenRequest(r, exchanger.Decoder())
 	if err != nil {
-		ExchangeRequestError(w, r, ErrInvalidRequest("error parsing form"))
+		ExchangeRequestError(w, r, err)
-		return
-	}
-	tokenReq := new(oidc.AccessTokenRequest)
-
-	err = exchanger.Decoder().Decode(tokenReq, r.Form)
-	if err != nil {
-		ExchangeRequestError(w, r, ErrInvalidRequest("error decoding form"))
-		return
 	}
 	if tokenReq.Code == "" {
 		ExchangeRequestError(w, r, ErrInvalidRequest("code missing"))
 		return
 	}
 
-	authReq, err := exchanger.Storage().AuthRequestByCode(tokenReq.Code)
+	authReq, err := ValidateAccessTokenRequest(tokenReq, exchanger)
-	if err != nil {
-		ExchangeRequestError(w, r, err)
-		return
-	}
-	client, err := AuthorizeClient(r, tokenReq, authReq, exchanger)
-	if err != nil {
-		ExchangeRequestError(w, r, err)
-		return
-	}
-	err = ValidateAccessTokenRequest(tokenReq, client, authReq)
 	if err != nil {
 		ExchangeRequestError(w, r, err)
 		return
 	}
+
 	err = exchanger.Storage().DeleteAuthRequestAndCode(authReq.GetID(), tokenReq.Code)
 	if err != nil {
 		ExchangeRequestError(w, r, err)
@@ -79,40 +62,84 @@ func CodeExchange(w http.ResponseWriter, r *http.Request, exchanger Exchanger) {
 	utils.MarshalJSON(w, resp)
 }
 
-func AuthorizeClient(r *http.Request, tokenReq *oidc.AccessTokenRequest, authReq AuthRequest, exchanger Exchanger) (Client, error) {
+func ParseAccessTokenRequest(r *http.Request, decoder *schema.Decoder) (*oidc.AccessTokenRequest, error) {
-	if tokenReq.ClientID == "" {
+	err := r.ParseForm()
-		if !exchanger.AuthMethodBasicSupported() {
+	if err != nil {
-			return nil, errors.New("basic not supported")
+		return nil, ErrInvalidRequest("error parsing form")
+	}
+	tokenReq := new(oidc.AccessTokenRequest)
+	err = decoder.Decode(tokenReq, r.Form)
+	if err != nil {
+		return nil, ErrInvalidRequest("error decoding form")
 	}
 	clientID, clientSecret, ok := r.BasicAuth()
 	if ok {
-			return exchanger.Storage().AuthorizeClientIDSecret(clientID, clientSecret)
+		tokenReq.ClientID = clientID
-		}
+		tokenReq.ClientSecret = clientSecret
 
 	}
-	if tokenReq.ClientSecret != "" {
+	return tokenReq, nil
+}
+
+func ValidateAccessTokenRequest(tokenReq *oidc.AccessTokenRequest, exchanger Exchanger) (AuthRequest, error) {
+	authReq, client, err := AuthorizeClient(tokenReq, exchanger)
+	if err != nil {
+		return nil, err
+	}
+	if client.GetID() != authReq.GetClientID() {
+		return nil, ErrInvalidRequest("invalid auth code")
+	}
+	if tokenReq.RedirectURI != authReq.GetRedirectURI() {
+		return nil, ErrInvalidRequest("redirect_uri does no correspond")
+	}
+	return authReq, nil
+}
+
+func AuthorizeClient(tokenReq *oidc.AccessTokenRequest, exchanger Exchanger) (AuthRequest, Client, error) {
+	client, err := exchanger.Storage().GetClientByClientID(tokenReq.ClientID)
+	if err != nil {
+		return nil, nil, err
+	}
+	switch client.GetAuthMethod() {
+	case AuthMethodNone:
+		authReq, err := AuthorizeCodeChallenge(tokenReq, exchanger)
+		return authReq, client, err
+	case AuthMethodPost:
 		if !exchanger.AuthMethodPostSupported() {
-			return nil, errors.New("post not supported")
+			return nil, nil, errors.New("basic not supported")
 		}
-		return exchanger.Storage().AuthorizeClientIDSecret(tokenReq.ClientID, tokenReq.ClientSecret)
+		err = AuthorizeClientIDSecret(tokenReq.ClientID, tokenReq.ClientSecret, exchanger)
+	case AuthMethodBasic:
+		err = AuthorizeClientIDSecret(tokenReq.ClientID, tokenReq.ClientSecret, exchanger)
+	default:
+		err = AuthorizeClientIDSecret(tokenReq.ClientID, tokenReq.ClientSecret, exchanger)
+	}
+	if err != nil {
+		return nil, nil, err
+	}
+	authReq, err := exchanger.Storage().AuthRequestByCode(tokenReq.Code)
+	if err != nil {
+		return nil, nil, err
+	}
+	return authReq, client, nil
+}
+
+func AuthorizeClientIDSecret(clientID, clientSecret string, exchanger Exchanger) error {
+	return exchanger.Storage().AuthorizeClientIDSecret(clientID, clientSecret)
+}
+
+func AuthorizeCodeChallenge(tokenReq *oidc.AccessTokenRequest, exchanger Exchanger) (AuthRequest, error) {
+	if tokenReq.CodeVerifier == "" {
+		return nil, ErrInvalidRequest("code_challenge required")
+	}
+	authReq, err := exchanger.Storage().AuthRequestByCode(tokenReq.Code)
+	if err != nil {
+		return nil, ErrInvalidRequest("invalid code")
 	}
-	if tokenReq.CodeVerifier != "" {
 	if !authReq.GetCodeChallenge().Verify(tokenReq.CodeVerifier) {
 		return nil, ErrInvalidRequest("code_challenge invalid")
 	}
-		return exchanger.Storage().GetClientByClientID(tokenReq.ClientID)
+	return authReq, nil
-	}
-	return nil, errors.New("Unimplemented") //TODO: impl
-}
-
-func ValidateAccessTokenRequest(tokenReq *oidc.AccessTokenRequest, client Client, authReq AuthRequest) error {
-	if client.GetID() != authReq.GetClientID() {
-		return ErrInvalidRequest("invalid auth code")
-	}
-	if tokenReq.RedirectURI != authReq.GetRedirectURI() {
-		return ErrInvalidRequest("redirect_uri does no correspond")
-	}
-	return nil
 }
 
 func ParseTokenExchangeRequest(w http.ResponseWriter, r *http.Request) (oidc.TokenRequest, error) {
@@ -120,6 +147,5 @@ func ParseTokenExchangeRequest(w http.ResponseWriter, r *http.Request) (oidc.Tok
 }
 
 func ValidateTokenExchangeRequest(tokenReq oidc.TokenRequest, storage Storage) error {
-
 	return errors.New("Unimplemented") //TODO: impl
 }