From 6f466455401fe117eb5151474a2bfba0ad6402f2 Mon Sep 17 00:00:00 2001
From: Andrey Petrov <andrey.petrov@shazow.net>
Date: Sat, 10 Jan 2015 11:31:18 -0800
Subject: [PATCH] Disallow op with no fingerprint.

---
 client.go | 8 ++++++--
 server.go | 4 ++++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/client.go b/client.go
index d29b5b6..781b4d8 100644
--- a/client.go
+++ b/client.go
@@ -347,8 +347,12 @@ func (c *Client) handleShell(channel ssh.Channel) {
 						c.SysMsg("No such name: %s", parts[1])
 					} else {
 						fingerprint := client.Fingerprint()
-						client.SysMsg("Made op by %s.", c.ColoredName())
-						c.Server.Op(fingerprint)
+						if fingerprint == "" {
+							c.SysMsg("Cannot op user without fingerprint.")
+						} else {
+							client.SysMsg("Made op by %s.", c.ColoredName())
+							c.Server.Op(fingerprint)
+						}
 					}
 				}
 			case "/kick":
diff --git a/server.go b/server.go
index 9022f38..c5f4127 100644
--- a/server.go
+++ b/server.go
@@ -363,6 +363,10 @@ func (s *Server) Uptime() string {
 
 // IsOp checks if the given client is Op
 func (s *Server) IsOp(client *Client) bool {
+	fingerprint := client.Fingerprint()
+	if fingerprint == "" {
+		return false
+	}
 	_, r := s.admins[client.Fingerprint()]
 	return r
 }