Require authentication for OAuth token refresh (#21421)
According to the OAuth spec https://datatracker.ietf.org/doc/html/rfc6749#section-6 when "Refreshing an Access Token" > The authorization server MUST ... require client authentication for confidential clients Fixes #21418 Co-authored-by: Gusted <williamzijl7@hotmail.com> Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
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f982a71997
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2 changed files with 68 additions and 12 deletions
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@ -48,6 +48,7 @@ const (
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// TODO move error and responses to SDK or models
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// AuthorizeErrorCode represents an error code specified in RFC 6749
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// https://datatracker.ietf.org/doc/html/rfc6749#section-4.2.2.1
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type AuthorizeErrorCode string
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const (
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@ -68,6 +69,7 @@ const (
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)
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// AuthorizeError represents an error type specified in RFC 6749
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// https://datatracker.ietf.org/doc/html/rfc6749#section-4.2.2.1
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type AuthorizeError struct {
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ErrorCode AuthorizeErrorCode `json:"error" form:"error"`
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ErrorDescription string
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@ -80,6 +82,7 @@ func (err AuthorizeError) Error() string {
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}
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// AccessTokenErrorCode represents an error code specified in RFC 6749
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// https://datatracker.ietf.org/doc/html/rfc6749#section-5.2
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type AccessTokenErrorCode string
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const (
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@ -98,6 +101,7 @@ const (
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)
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// AccessTokenError represents an error response specified in RFC 6749
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// https://datatracker.ietf.org/doc/html/rfc6749#section-5.2
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type AccessTokenError struct {
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ErrorCode AccessTokenErrorCode `json:"error" form:"error"`
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ErrorDescription string `json:"error_description"`
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@ -129,6 +133,7 @@ const (
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)
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// AccessTokenResponse represents a successful access token response
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// https://datatracker.ietf.org/doc/html/rfc6749#section-4.2.2
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type AccessTokenResponse struct {
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AccessToken string `json:"access_token"`
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TokenType TokenType `json:"token_type"`
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@ -663,6 +668,30 @@ func AccessTokenOAuth(ctx *context.Context) {
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}
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func handleRefreshToken(ctx *context.Context, form forms.AccessTokenForm, serverKey, clientKey oauth2.JWTSigningKey) {
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app, err := auth.GetOAuth2ApplicationByClientID(ctx, form.ClientID)
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if err != nil {
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handleAccessTokenError(ctx, AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidClient,
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ErrorDescription: fmt.Sprintf("cannot load client with client id: %q", form.ClientID),
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})
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return
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}
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// "The authorization server MUST ... require client authentication for confidential clients"
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// https://datatracker.ietf.org/doc/html/rfc6749#section-6
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if !app.ValidateClientSecret([]byte(form.ClientSecret)) {
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errorDescription := "invalid client secret"
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if form.ClientSecret == "" {
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errorDescription = "invalid empty client secret"
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}
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// "invalid_client ... Client authentication failed"
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// https://datatracker.ietf.org/doc/html/rfc6749#section-5.2
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handleAccessTokenError(ctx, AccessTokenError{
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ErrorCode: AccessTokenErrorCodeInvalidClient,
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ErrorDescription: errorDescription,
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})
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return
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}
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token, err := oauth2.ParseToken(form.RefreshToken, serverKey)
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if err != nil {
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handleAccessTokenError(ctx, AccessTokenError{
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@ -299,10 +299,11 @@ func TestAccessTokenExchangeWithBasicAuth(t *testing.T) {
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"client_secret": "inconsistent",
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})
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req.Header.Add("Authorization", "Basic ZGE3ZGEzYmEtOWExMy00MTY3LTg1NmYtMzg5OWRlMGIwMTM4OjRNSzhOYTZSNTVzbWRDWTBXdUNDdW1aNmhqUlBuR1k1c2FXVlJISGpKaUE9")
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resp = MakeRequest(t, req, http.StatusBadRequest)
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parsedError = new(auth.AccessTokenError)
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assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
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assert.Equal(t, "invalid_request", string(parsedError.ErrorCode))
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assert.Equal(t, "client_id in request body inconsistent with Authorization header", parsedError.ErrorDescription)
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assert.Equal(t, "client_secret in request body inconsistent with Authorization header", parsedError.ErrorDescription)
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}
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func TestRefreshTokenInvalidation(t *testing.T) {
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@ -329,7 +330,33 @@ func TestRefreshTokenInvalidation(t *testing.T) {
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// test without invalidation
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setting.OAuth2.InvalidateRefreshTokens = false
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refreshReq := NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
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req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
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"grant_type": "refresh_token",
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"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
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// omit secret
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"redirect_uri": "a",
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"refresh_token": parsed.RefreshToken,
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})
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resp = MakeRequest(t, req, http.StatusBadRequest)
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parsedError := new(auth.AccessTokenError)
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assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
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assert.Equal(t, "invalid_client", string(parsedError.ErrorCode))
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assert.Equal(t, "invalid empty client secret", parsedError.ErrorDescription)
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req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
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"grant_type": "refresh_token",
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"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
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"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
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"redirect_uri": "a",
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"refresh_token": "UNEXPECTED",
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})
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resp = MakeRequest(t, req, http.StatusBadRequest)
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parsedError = new(auth.AccessTokenError)
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assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
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assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
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assert.Equal(t, "unable to parse refresh token", parsedError.ErrorDescription)
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req = NewRequestWithValues(t, "POST", "/login/oauth/access_token", map[string]string{
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"grant_type": "refresh_token",
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"client_id": "da7da3ba-9a13-4167-856f-3899de0b0138",
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"client_secret": "4MK8Na6R55smdCY0WuCCumZ6hjRPnGY5saWVRHHjJiA=",
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@ -337,24 +364,24 @@ func TestRefreshTokenInvalidation(t *testing.T) {
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"refresh_token": parsed.RefreshToken,
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})
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bs, err := io.ReadAll(refreshReq.Body)
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bs, err := io.ReadAll(req.Body)
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assert.NoError(t, err)
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refreshReq.Body = io.NopCloser(bytes.NewReader(bs))
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MakeRequest(t, refreshReq, http.StatusOK)
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req.Body = io.NopCloser(bytes.NewReader(bs))
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MakeRequest(t, req, http.StatusOK)
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refreshReq.Body = io.NopCloser(bytes.NewReader(bs))
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MakeRequest(t, refreshReq, http.StatusOK)
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req.Body = io.NopCloser(bytes.NewReader(bs))
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MakeRequest(t, req, http.StatusOK)
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// test with invalidation
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setting.OAuth2.InvalidateRefreshTokens = true
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refreshReq.Body = io.NopCloser(bytes.NewReader(bs))
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MakeRequest(t, refreshReq, http.StatusOK)
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req.Body = io.NopCloser(bytes.NewReader(bs))
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MakeRequest(t, req, http.StatusOK)
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// repeat request should fail
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refreshReq.Body = io.NopCloser(bytes.NewReader(bs))
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resp = MakeRequest(t, refreshReq, http.StatusBadRequest)
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parsedError := new(auth.AccessTokenError)
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req.Body = io.NopCloser(bytes.NewReader(bs))
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resp = MakeRequest(t, req, http.StatusBadRequest)
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parsedError = new(auth.AccessTokenError)
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assert.NoError(t, json.Unmarshal(resp.Body.Bytes(), parsedError))
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assert.Equal(t, "unauthorized_client", string(parsedError.ErrorCode))
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assert.Equal(t, "token was already used", parsedError.ErrorDescription)
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