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-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
-- Copyright (C) 2010 Jeff Mitchell
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--
local datamanager = require "util.datamanager";
local log = require "util.logger".init("usermanager");
local type = type;
local error = error;
local ipairs = ipairs;
local hashes = require "util.hashes";
local jid_bare = require "util.jid".bare;
local getAuthenticationDatabaseSHA1 = require "util.sasl.scram".getAuthenticationDatabaseSHA1;
local config = require "core.configmanager";
local usermanager = require "core.usermanager";
local generate_uuid = require "util.uuid".generate;
local new_sasl = require "util.sasl".new;
local nodeprep = require "util.encodings".stringprep.nodeprep;
local hosts = hosts;
local prosody = _G.prosody;
local is_cyrus = usermanager.is_cyrus;
-- Default; can be set per-user
local iteration_count = 4096;
function new_hashpass_provider(host)
local provider = { name = "internal_hashed" };
log("debug", "initializing hashpass authentication provider for host '%s'", host);
function provider.test_password(username, password)
if is_cyrus(host) then return nil, "Legacy auth not supported with Cyrus SASL."; end
local credentials = datamanager.load(username, host, "accounts") or {};
if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
if credentials.password ~= password then
return nil, "Auth failed. Provided password is incorrect.";
end
if provider.set_password(username, credentials.password) == nil then
return nil, "Auth failed. Could not set hashed password from plaintext.";
else
return true;
end
end
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 = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key_hex then
return true;
else
return nil, "Auth failed. Invalid username, password, or password hash information.";
end
end
function provider.set_password(username, password)
if is_cyrus(host) then return nil, "Passwords unavailable for Cyrus SASL."; end
local account = datamanager.load(username, host, "accounts");
if account then
if account.iteration_count == nil then
account.iteration_count = iteration_count;
end
if account.salt == nil then
account.salt = generate_uuid();
end
local valid, binpass = saltedPasswordSHA1(password, account.salt, account.iteration_count);
local hexpass = binpass:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
account.hashpass = hexpass;
account.password = nil;
return datamanager.store(username, host, "accounts", account);
end
return nil, "Account not available.";
end
function provider.user_exists(username)
if is_cyrus(host) then return true; end
local account = datamanager.load(username, host, "accounts");
if not account then
log("debug", "account not found for username '%s' at host '%s'", username, module.host);
return nil, "Auth failed. Invalid username";
end
if (account.hashpass == nil or string.len(account.hashpass) == 0) and (account.password == nil or string.len(account.password) == 0) then
log("debug", "account password not set or zero-length for username '%s' at host '%s'", username, module.host);
return nil, "Auth failed. Password invalid.";
end
return true;
end
function provider.create_user(username, password)
if is_cyrus(host) then return nil, "Account creation/modification not available with Cyrus SASL."; end
local salt = generate_uuid();
local valid, stored_key, server_key = saltedPasswordSHA1(password, salt, iteration_count);
local stored_key_hex = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
return datamanager.store(username, host, "accounts", {stored_key = stored_key_hex, server_key = server_key_hex, salt = salt, iteration_count = iteration_count});
end
function provider.get_sasl_handler()
local realm = module:get_option("sasl_realm") or module.host;
local testpass_authentication_profile = {
plain_test = function(username, password, realm)
local prepped_username = nodeprep(username);
if not prepped_username then
log("debug", "NODEprep failed on username: %s", username);
return "", nil;
end
return usermanager.test_password(prepped_username, password, realm), true;
end,
scram_sha_1 = function(username, realm)
local credentials = datamanager.load(username, host, "accounts") or {};
if credentials.password then
usermanager.set_password(username, credentials.password);
credentials = datamanager.load(username, host, "accounts") or {};
end
local stored_key, server_key, iteration_count, salt = credentials.stored_key, credentials.server_key, credentials.iteration_count, credentials.salt;
stored_key = stored_key and stored_key:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
server_key = server_key and server_key:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
return stored_key, server_key, iteration_count, salt, true;
end
};
return new_sasl(realm, testpass_authentication_profile);
end
function provider.is_admin(jid)
local admins = config.get(host, "core", "admins");
if admins ~= config.get("*", "core", "admins") and type(admins) == "table" then
jid = jid_bare(jid);
for _,admin in ipairs(admins) do
if admin == jid then return true; end
end
elseif admins then
log("error", "Option 'admins' for host '%s' is not a table", host);
end
return is_admin(jid); -- Test whether it's a global admin instead
end
return provider;
end
module:add_item("auth-provider", new_hashpass_provider(module.host));
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