oauth2_proxy/providers/internal_util.go

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package providers
import (
"io/ioutil"
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"net/http"
"net/url"
"github.com/pusher/oauth2_proxy/logger"
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"github.com/pusher/oauth2_proxy/pkg/requests"
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)
// 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
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func validateToken(p Provider, accessToken string, header http.Header) bool {
if accessToken == "" || p.Data().ValidateURL == nil {
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return false
}
endpoint := p.Data().ValidateURL.String()
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if len(header) == 0 {
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params := url.Values{"access_token": {accessToken}}
endpoint = endpoint + "?" + params.Encode()
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}
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resp, err := requests.RequestUnparsedResponse(endpoint, header)
if err != nil {
logger.Printf("GET %s", stripToken(endpoint))
logger.Printf("token validation request failed: %s", err)
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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
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}