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logout.go
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logout.go
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// Copyright © 2019 The Things Network Foundation, The Things Industries B.V.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package oauthclient
import (
"net/http"
"net/url"
"strings"
echo "github.com/labstack/echo/v4"
"go.thethings.network/lorawan-stack/v3/pkg/auth"
"go.thethings.network/lorawan-stack/v3/pkg/log"
"go.thethings.network/lorawan-stack/v3/pkg/rpcmetadata"
"go.thethings.network/lorawan-stack/v3/pkg/ttnpb"
"google.golang.org/grpc"
)
func stripCommonRoot(URL string, rootURL string) string {
trimmedURL := strings.TrimSuffix(rootURL, "/")
if rootURL, err := url.Parse(rootURL); err == nil {
rootURLSchemeHost := (&url.URL{Scheme: rootURL.Scheme, Host: rootURL.Host}).String()
if strings.HasPrefix(URL, rootURLSchemeHost) {
return strings.TrimPrefix(trimmedURL, rootURLSchemeHost)
}
}
return trimmedURL
}
// HandleLogout invalidates the user's authorization, removes the auth
// cookie and provides a URL to logout of the OAuth provider as well.
func (oc *OAuthClient) HandleLogout(c echo.Context) error {
token, err := oc.freshToken(c)
if err != nil {
return err
}
config := oc.configFromContext(c.Request().Context())
u, err := url.Parse(config.LogoutURL)
if err != nil {
return err
}
logoutURL := config.LogoutURL
// If a logout URL is configured, return a decorated logout URI so the client
// can decide to additionally logout of the OAuth server itself.
if logoutURL != "" {
_, tokenID, _, err := auth.SplitToken(token.AccessToken)
if err != nil {
return err
}
redirectURL := stripCommonRoot(logoutURL, config.RootURL)
query := url.Values{
"access_token_id": []string{tokenID},
"post_logout_redirect_uri": []string{redirectURL},
}
u.RawQuery = query.Encode()
oc.removeAuthCookie(c)
return c.JSON(http.StatusOK, struct {
OpLogoutURI string `json:"op_logout_uri"`
}{
OpLogoutURI: u.String(),
})
}
// Otherwise, delete the access token in the OAuth server.
creds := grpc.PerRPCCredentials(rpcmetadata.MD{
AuthType: "Bearer",
AuthValue: token.AccessToken,
AllowInsecure: oc.component.AllowInsecureForCredentials(),
})
ctx := c.Request().Context()
if cc, err := oc.component.GetPeerConn(ctx, ttnpb.ClusterRole_ACCESS, nil); err == nil {
if res, err := ttnpb.NewEntityAccessClient(cc).AuthInfo(ctx, ttnpb.Empty, creds); err == nil {
if tokenInfo := res.GetOAuthAccessToken(); tokenInfo != nil {
_, err := ttnpb.NewOAuthAuthorizationRegistryClient(cc).DeleteToken(ctx, &ttnpb.OAuthAccessTokenIdentifiers{
UserIDs: tokenInfo.UserIDs,
ClientIDs: tokenInfo.ClientIDs,
ID: tokenInfo.ID,
}, creds)
if err != nil {
log.FromContext(ctx).WithError(err).Error("Could not invalidate access token")
}
}
}
}
oc.removeAuthCookie(c)
return c.NoContent(http.StatusNoContent)
}