mod_auth_internal_*: Apply saslprep to passwords

Related to #1560

3 files changed, 25 insertions, 2 deletions

diff --git a/plugins/mod_auth_insecure.lua b/plugins/mod_auth_insecure.lua
index 9e23c29f..dc5ee616 100644
--- a/plugins/mod_auth_insecure.lua
+++ b/plugins/mod_auth_insecure.lua
@@ -9,6 +9,7 @@
 
 local datamanager = require "util.datamanager";
 local new_sasl = require "util.sasl".new;
+local saslprep = require "util.encodings".stringprep.saslprep;
 
 local host = module.host;
 local provider = { name = "insecure" };
@@ -21,6 +22,10 @@ end
 
 function provider.set_password(username, password)
 	local account = datamanager.load(username, host, "accounts");
+	password = saslprep(password);
+	if not password then
+		return nil, "Password fails SASLprep.";
+	end
 	if account then
 		account.password = password;
 		return datamanager.store(username, host, "accounts", account);
diff --git a/plugins/mod_auth_internal_hashed.lua b/plugins/mod_auth_internal_hashed.lua
index 083f648b..15058098 100644
--- a/plugins/mod_auth_internal_hashed.lua
+++ b/plugins/mod_auth_internal_hashed.lua
@@ -15,6 +15,7 @@ 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 saslprep = require "util.encodings".stringprep.saslprep;
 
 local log = module._log;
 local host = module.host;
@@ -32,9 +33,13 @@ local provider = {};
 function provider.test_password(username, password)
 	log("debug", "test password for user '%s'", username);
 	local credentials = accounts:get(username) or {};
+	password = saslprep(password);
+	if not password then
+		return nil, "Password fails SASLprep.";
+	end
 
 	if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
-		if credentials.password ~= password then
+		if saslprep(credentials.password) ~= password then
 			return nil, "Auth failed. Provided password is incorrect.";
 		end
 
diff --git a/plugins/mod_auth_internal_plain.lua b/plugins/mod_auth_internal_plain.lua
index 276efb64..56ef52d5 100644
--- a/plugins/mod_auth_internal_plain.lua
+++ b/plugins/mod_auth_internal_plain.lua
@@ -8,6 +8,7 @@
 
 local usermanager = require "core.usermanager";
 local new_sasl = require "util.sasl".new;
+local saslprep = require "util.encodings".stringprep.saslprep;
 
 local log = module._log;
 local host = module.host;
@@ -20,8 +21,12 @@ local provider = {};
 function provider.test_password(username, password)
 	log("debug", "test password for user '%s'", username);
 	local credentials = accounts:get(username) or {};
+	password = saslprep(password);
+	if not password then
+		return nil, "Password fails SASLprep.";
+	end
 
-	if password == credentials.password then
+	if password == saslprep(credentials.password) then
 		return true;
 	else
 		return nil, "Auth failed. Invalid username or password.";
@@ -35,6 +40,10 @@ end
 
 function provider.set_password(username, password)
 	log("debug", "set_password for username '%s'", username);
+	password = saslprep(password);
+	if not password then
+		return nil, "Password fails SASLprep.";
+	end
 	local account = accounts:get(username);
 	if account then
 		account.password = password;
@@ -57,6 +66,10 @@ function provider.users()
 end
 
 function provider.create_user(username, password)
+	password = saslprep(password);
+	if not password then
+		return nil, "Password fails SASLprep.";
+	end
 	return accounts:set(username, {password = password});
 end