adds /whitelist command for ops

client.go

@@ -31,6 +31,7 @@ const OP_HELP_TEXT string = SYSTEM_MESSAGE_FORMAT + `-> Available operator comma
    /op $NAME                 - Promote a user to server operator.
    /silence $NAME            - Revoke a user's ability to speak.
    /motd $MESSAGE            - Sets the Message of the Day
+   /whitelist $FINGERPRINT   - Adds pubkey fingerprint to the connection whitelist
 ` + RESET
 
 const ABOUT_TEXT string = SYSTEM_MESSAGE_FORMAT + `-> ssh-chat is made by @shazow.
@@ -324,6 +325,16 @@ func (c *Client) handleShell(channel ssh.Channel) {
 					c.Server.SetMotd(c, newmotd)
 					c.Server.MotdBroadcast(c)
 				}
+			case "/whitelist": /* whitelist a fingerprint */
+				if !c.Server.IsOp(c) {
+					c.SysMsg("You're not an admin.")
+				} else if len(parts) != 2 {
+					c.SysMsg("Missing $FINGERPRINT from: /whitelist $FINGERPRINT")
+				} else {
+					fingerprint := parts[1]
+					c.Server.Whitelist(fingerprint)
+					c.SysMsg("Added %s to the whitelist", fingerprint)
+				}
 
 			default:
 				c.SysMsg("Invalid command: %s", line)

server.go

@@ -237,9 +237,9 @@ func (s *Server) Op(fingerprint string) {
 
 func (s *Server) Whitelist(fingerprint string) {
 	logger.Infof("Adding whitelist: %s", fingerprint)
-	s.lock.Lock()
+	s.Lock()
 	s.whitelist[fingerprint] = struct{}{}
-	s.lock.Unlock()
+	s.Unlock()
 }
 
 func (s *Server) Uptime() string {