SeanPONeil · May 1, 2013 20:03 · May 1, 2013
diff --git a/parseParams.java b/parseParams.java
@@ -0,0 +1,31 @@
+private static String parseVals(String key, String val, String prefix) throws InvalidKeyException, NoSuchAlgorithmException, IOException {
+  	long ts = System.currentTimeMillis() / 1000;
+
+		String[] parts = val.split("\\|");
+		String u_prefix = parts[0];
+		String u_b64 = parts[1];
+		String u_sig = parts[2];
+
+		String sig = Util.hmacSign(key, u_prefix + "|" + u_b64);
+		if (!Util.hmacSign(key, sig).equals(Util.hmacSign(key, u_sig))) {
+			return null;
+		}
+
+		if (!u_prefix.equals(prefix)) {
+			return null;
+		}
+
+		byte[] decoded = Base64.decode(u_b64);
+		String cookie = new String(decoded);
+
+		String[] cookie_parts = cookie.split("\\|");
+		String username = cookie_parts[0];
+		String expire = cookie_parts[2];
+
+		long expire_ts = Long.parseLong(expire);
+		if (ts >= expire_ts) {
+			return null;
+		}
+
+		return username;		
+	}