util.sasl.scram: Parsing client-first-message in a more strict way. (thanks Marc Santamaria)
--- a/util/sasl/scram.lua Sat May 22 01:48:31 2010 +0200
+++ b/util/sasl/scram.lua Sat May 22 13:58:15 2010 +0200
@@ -100,12 +100,10 @@
-- we are processing client_first_message
local client_first_message = message;
- -- TODO: more strict parsing of client_first_message
-- TODO: fail if authzid is provided, since we don't support them yet
self.state["client_first_message"] = client_first_message;
- self.state["name"] = client_first_message:match("n=(.+),r=")
- self.state["clientnonce"] = client_first_message:match("r=([^,]+)")
- self.state["gs2_cbind_flag"] = client_first_message:sub(1, 1)
+ self.state["gs2_cbind_flag"], self.state["authzid"], self.state["name"], self.state["clientnonce"] = client_first_message:match("^(%a),(.*),n=(.*),r=([^,]*).*");
+
-- we don't do any channel binding yet
if self.state.gs2_cbind_flag ~= "n" and self.state.gs2_cbind_flag ~= "y" then
return "failure", "malformed-request";