distribution/registry/auth/token/util.go
Stephen J Day 0371f648bf Move auth package under registry package
Signed-off-by: Stephen J Day <stephen.day@docker.com>
2015-02-10 17:34:04 -08:00

58 lines
1.5 KiB
Go

package token
import (
"encoding/base64"
"errors"
"strings"
)
// joseBase64UrlEncode encodes the given data using the standard base64 url
// encoding format but with all trailing '=' characters ommitted in accordance
// with the jose specification.
// http://tools.ietf.org/html/draft-ietf-jose-json-web-signature-31#section-2
func joseBase64UrlEncode(b []byte) string {
return strings.TrimRight(base64.URLEncoding.EncodeToString(b), "=")
}
// joseBase64UrlDecode decodes the given string using the standard base64 url
// decoder but first adds the appropriate number of trailing '=' characters in
// accordance with the jose specification.
// http://tools.ietf.org/html/draft-ietf-jose-json-web-signature-31#section-2
func joseBase64UrlDecode(s string) ([]byte, error) {
switch len(s) % 4 {
case 0:
case 2:
s += "=="
case 3:
s += "="
default:
return nil, errors.New("illegal base64url string")
}
return base64.URLEncoding.DecodeString(s)
}
// actionSet is a special type of stringSet.
type actionSet struct {
stringSet
}
func newActionSet(actions ...string) actionSet {
return actionSet{newStringSet(actions...)}
}
// Contains calls StringSet.Contains() for
// either "*" or the given action string.
func (s actionSet) contains(action string) bool {
return s.stringSet.contains("*") || s.stringSet.contains(action)
}
// contains returns true if q is found in ss.
func contains(ss []string, q string) bool {
for _, s := range ss {
if s == q {
return true
}
}
return false
}