package providers import ( "io/ioutil" "net/http" "net/url" "github.com/pusher/oauth2_proxy/api" "github.com/pusher/oauth2_proxy/logger" ) // stripToken is a helper function to obfuscate "access_token" // query parameters func stripToken(endpoint string) string { return stripParam("access_token", endpoint) } // stripParam generalizes the obfuscation of a particular // query parameter - typically 'access_token' or 'client_secret' // The parameter's second half is replaced by '...' and returned // as part of the encoded query parameters. // If the target parameter isn't found, the endpoint is returned // unmodified. func stripParam(param, endpoint string) string { u, err := url.Parse(endpoint) if err != nil { logger.Printf("error attempting to strip %s: %s", param, err) return endpoint } if u.RawQuery != "" { values, err := url.ParseQuery(u.RawQuery) if err != nil { logger.Printf("error attempting to strip %s: %s", param, err) return u.String() } if val := values.Get(param); val != "" { values.Set(param, val[:(len(val)/2)]+"...") u.RawQuery = values.Encode() return u.String() } } return endpoint } // validateToken returns true if token is valid func validateToken(p Provider, accessToken string, header http.Header) bool { if accessToken == "" || p.Data().ValidateURL == nil { return false } endpoint := p.Data().ValidateURL.String() if len(header) == 0 { params := url.Values{"access_token": {accessToken}} endpoint = endpoint + "?" + params.Encode() } resp, err := api.RequestUnparsedResponse(endpoint, header) if err != nil { logger.Printf("GET %s", stripToken(endpoint)) logger.Printf("token validation request failed: %s", err) return false } body, _ := ioutil.ReadAll(resp.Body) resp.Body.Close() logger.Printf("%d GET %s %s", resp.StatusCode, stripToken(endpoint), body) if resp.StatusCode == 200 { return true } logger.Printf("token validation request failed: status %d - %s", resp.StatusCode, body) return false }