# HG changeset patch
# User Kim Alvefur <zash@zash.se>
# Date 1381620988 -7200
# Node ID 61f748d363e15e7e254108ffd05141cf7b93afe4
# Parent  35780ef2d689cf972b9a0dfecfbf0381a9c9a524
util.sasl.scram: Cache profile name instead of concatenating when used

diff -r 35780ef2d689 -r 61f748d363e1 util/sasl/scram.lua
--- a/util/sasl/scram.lua	Sun Oct 13 01:14:21 2013 +0200
+++ b/util/sasl/scram.lua	Sun Oct 13 01:36:28 2013 +0200
@@ -101,6 +101,7 @@
 end
 
 local function scram_gen(hash_name, H_f, HMAC_f)
+	local profile_name = "scram_" .. hashprep(hash_name);
 	local function scram_hash(self, message)
 		local support_channel_binding = false;
 		if self.profile.cb then support_channel_binding = true; end
@@ -168,9 +169,9 @@
 					log("error", "Generating authentication database failed. Reason: %s", stored_key);
 					return "failure", "temporary-auth-failure";
 				end
-			elseif self.profile["scram_"..hashprep(hash_name)] then
+			elseif self.profile[profile_name] then
 				local state;
-				stored_key, server_key, iteration_count, salt, state = self.profile["scram_"..hashprep(hash_name)](self, name, self.realm);
+				stored_key, server_key, iteration_count, salt, state = self.profile[profile_name](self, name, self.realm);
 				if state == nil then return "failure", "not-authorized"
 				elseif state == false then return "failure", "account-disabled" end
 			end