Add post token implementation

Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)

contrib/token-server/token.go

@@ -55,6 +55,23 @@ func ResolveScopeSpecifiers(ctx context.Context, scopeSpecs []string) []auth.Acc
 	return requestedAccessList
 }
 
+// ResolveScopeList converts a scope list from a token request's
+// `scope` parameter into a list of standard access objects.
+func ResolveScopeList(ctx context.Context, scopeList string) []auth.Access {
+	scopes := strings.Split(scopeList, " ")
+	return ResolveScopeSpecifiers(ctx, scopes)
+}
+
+// ToScopeList converts a list of access to a
+// scope list string
+func ToScopeList(access []auth.Access) string {
+	var s []string
+	for _, a := range access {
+		s = append(s, fmt.Sprintf("%s:%s:%s", a.Type, a.Name, a.Action))
+	}
+	return strings.Join(s, ",")
+}
+
 // TokenIssuer represents an issuer capable of generating JWT tokens
 type TokenIssuer struct {
 	Issuer     string