1 files changed, 28 insertions, 37 deletions

diff --git a/plugins/mod_auth_internal_hashed.lua b/plugins/mod_auth_internal_hashed.lua
index 2b041e43..53e345e5 100644
--- a/plugins/mod_auth_internal_hashed.lua
+++ b/plugins/mod_auth_internal_hashed.lua
@@ -7,44 +7,30 @@
 -- COPYING file in the source package for more information.
 --
 
-local log = require "util.logger".init("auth_internal_hashed");
+local max = math.max;
+
 local getAuthenticationDatabaseSHA1 = require "util.sasl.scram".getAuthenticationDatabaseSHA1;
 local usermanager = require "core.usermanager";
 local generate_uuid = require "util.uuid".generate;
 local new_sasl = require "util.sasl".new;
+local hex = require"util.hex";
+local to_hex, from_hex = hex.to, hex.from;
+
+local log = module._log;
+local host = module.host;
 
 local accounts = module:open_store("accounts");
 
-local to_hex;
-do
-	local function replace_byte_with_hex(byte)
-		return ("%02x"):format(byte:byte());
-	end
-	function to_hex(binary_string)
-		return binary_string:gsub(".", replace_byte_with_hex);
-	end
-end
-
-local from_hex;
-do
-	local function replace_hex_with_byte(hex)
-		return string.char(tonumber(hex, 16));
-	end
-	function from_hex(hex_string)
-		return hex_string:gsub("..", replace_hex_with_byte);
-	end
-end
 
 
 -- Default; can be set per-user
-local iteration_count = 4096;
+local default_iteration_count = 4096;
 
-local host = module.host;
 -- define auth provider
 local provider = {};
-log("debug", "initializing internal_hashed authentication provider for host '%s'", host);
 
 function provider.test_password(username, password)
+	log("debug", "test password for user '%s'", username);
 	local credentials = accounts:get(username) or {};
 
 	if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
@@ -62,12 +48,12 @@ function provider.test_password(username, password)
 	if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
 		return nil, "Auth failed. Stored salt and iteration count information is not complete.";
 	end
-	
+
 	local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
-	
+
 	local stored_key_hex = to_hex(stored_key);
 	local server_key_hex = to_hex(server_key);
-	
+
 	if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key then
 		return true;
 	else
@@ -76,14 +62,15 @@ function provider.test_password(username, password)
 end
 
 function provider.set_password(username, password)
+	log("debug", "set_password for username '%s'", username);
 	local account = accounts:get(username);
 	if account then
-		account.salt = account.salt or generate_uuid();
-		account.iteration_count = account.iteration_count or iteration_count;
+		account.salt = generate_uuid();
+		account.iteration_count = max(account.iteration_count or 0, default_iteration_count);
 		local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, account.salt, account.iteration_count);
 		local stored_key_hex = to_hex(stored_key);
 		local server_key_hex = to_hex(server_key);
-		
+
 		account.stored_key = stored_key_hex
 		account.server_key = server_key_hex
 
@@ -96,7 +83,7 @@ end
 function provider.user_exists(username)
 	local account = accounts:get(username);
 	if not account then
-		log("debug", "account not found for username '%s' at host '%s'", username, host);
+		log("debug", "account not found for username '%s'", username);
 		return nil, "Auth failed. Invalid username";
 	end
 	return true;
@@ -111,10 +98,13 @@ function provider.create_user(username, password)
 		return accounts:set(username, {});
 	end
 	local salt = generate_uuid();
-	local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, salt, iteration_count);
+	local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, salt, default_iteration_count);
 	local stored_key_hex = to_hex(stored_key);
 	local server_key_hex = to_hex(server_key);
-	return accounts:set(username, {stored_key = stored_key_hex, server_key = server_key_hex, salt = salt, iteration_count = iteration_count});
+	return accounts:set(username, {
+		stored_key = stored_key_hex, server_key = server_key_hex,
+		salt = salt, iteration_count = default_iteration_count
+	});
 end
 
 function provider.delete_user(username)
@@ -123,10 +113,10 @@ end
 
 function provider.get_sasl_handler()
 	local testpass_authentication_profile = {
-		plain_test = function(sasl, username, password, realm)
+		plain_test = function(_, username, password, realm)
 			return usermanager.test_password(username, realm, password), true;
 		end,
-		scram_sha_1 = function(sasl, username, realm)
+		scram_sha_1 = function(_, username)
 			local credentials = accounts:get(username);
 			if not credentials then return; end
 			if credentials.password then
@@ -134,8 +124,9 @@ function provider.get_sasl_handler()
 				credentials = accounts:get(username);
 				if not credentials then return; end
 			end
-			
-			local stored_key, server_key, iteration_count, salt = credentials.stored_key, credentials.server_key, credentials.iteration_count, credentials.salt;
+
+			local stored_key, server_key = credentials.stored_key, credentials.server_key;
+			local iteration_count, salt = credentials.iteration_count, credentials.salt;
 			stored_key = stored_key and from_hex(stored_key);
 			server_key = server_key and from_hex(server_key);
 			return stored_key, server_key, iteration_count, salt, true;
@@ -143,6 +134,6 @@ function provider.get_sasl_handler()
 	};
 	return new_sasl(host, testpass_authentication_profile);
 end
-	
+
 module:provides("auth", provider);