From d4780cd8b5fffdab1cc8ef7a4f9050dc37755847 Mon Sep 17 00:00:00 2001
From: David Symonds <dsymonds@golang.org>
Date: Mon, 9 Nov 2015 11:52:04 +1100
Subject: [PATCH] jws: fix base64Decode for strings of length 1 (mod 4).

Change-Id: I5369e4d5454de2cf041363af1328f69d526b17d4
Reviewed-on: https://go-review.googlesource.com/16750
Reviewed-by: Andrew Gerrand <adg@golang.org>
---
 jws/jws.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/jws/jws.go b/jws/jws.go
index e300001..8ca5978 100644
--- a/jws/jws.go
+++ b/jws/jws.go
@@ -161,6 +161,8 @@ func base64Encode(b []byte) string {
 func base64Decode(s string) ([]byte, error) {
 	// add back missing padding
 	switch len(s) % 4 {
+	case 1:
+		s += "==="
 	case 2:
 		s += "=="
 	case 3: