plugins/mod_auth_internal_hashed.lua

   1 -- Prosody IM
   2 -- Copyright (C) 2008-2010 Matthew Wild
   3 -- Copyright (C) 2008-2010 Waqas Hussain
   4 -- Copyright (C) 2010 Jeff Mitchell
   5 --
   6 -- This project is MIT/X11 licensed. Please see the
   7 -- COPYING file in the source package for more information.
   8 --
   9
  10 local datamanager = require "util.datamanager";
  11 local log = require "util.logger".init("usermanager");
  12 local type = type;
  13 local error = error;
  14 local ipairs = ipairs;
  15 local hashes = require "util.hashes";
  16 local jid_bare = require "util.jid".bare;
  17 local getAuthenticationDatabaseSHA1 = require "util.sasl.scram".getAuthenticationDatabaseSHA1;
  18 local config = require "core.configmanager";
  19 local usermanager = require "core.usermanager";
  20 local generate_uuid = require "util.uuid".generate;
  21 local new_sasl = require "util.sasl".new;
  22 local nodeprep = require "util.encodings".stringprep.nodeprep;
  23 local hosts = hosts;
  24
  25 -- TODO: remove these two lines in near future
  26 local hmac_sha1 = require "util.hmac".sha1;
  27 local sha1 = require "util.hashes".sha1;
  28
  29 local prosody = _G.prosody;
  30
  31 -- Default; can be set per-user
  32 local iteration_count = 4096;
  33
  34 function new_hashpass_provider(host)
  35         local provider = { name = "internal_hashed" };
  36         log("debug", "initializing hashpass authentication provider for host '%s'", host);
  37
  38         function provider.test_password(username, password)
  39                 local credentials = datamanager.load(username, host, "accounts") or {};
  40
  41                 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
  42                         if credentials.password ~= password then
  43                                 return nil, "Auth failed. Provided password is incorrect.";
  44                         end
  45
  46                         if provider.set_password(username, credentials.password) == nil then
  47                                 return nil, "Auth failed. Could not set hashed password from plaintext.";
  48                         else
  49                                 return true;
  50                         end
  51                 end
  52
  53                 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
  54                         return nil, "Auth failed. Stored salt and iteration count information is not complete.";
  55                 end
  56
  57                 -- convert hexpass to stored_key and server_key
  58                 -- TODO: remove this in near future
  59                 if credentials.hashpass then
  60                         local salted_password = credentials.hashpass:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
  61                         credentials.stored_key = sha1(hmac_sha1(salted_password, "Client Key")):gsub(".", function (c) return ("%02x"):format(c:byte()); end);
  62                         credentials.server_key = hmac_sha1(salted_password, "Server Key"):gsub(".", function (c) return ("%02x"):format(c:byte()); end);
  63                         credentials.hashpass = nil
  64                         datamanager.store(username, host, "accounts", credentials);
  65                 end
  66
  67                 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
  68
  69                 local stored_key_hex = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
  70                 local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
  71
  72                 if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key then
  73                         return true;
  74                 else
  75                         return nil, "Auth failed. Invalid username, password, or password hash information.";
  76                 end
  77         end
  78
  79         function provider.set_password(username, password)
  80                 local account = datamanager.load(username, host, "accounts");
  81                 if account then
  82                         account.salt = account.salt or generate_uuid();
  83                         account.iteration_count = account.iteration_count or iteration_count;
  84                         local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, account.salt, account.iteration_count);
  85                         local stored_key_hex = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
  86                         local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
  87
  88                         account.stored_key = stored_key_hex
  89                         account.server_key = server_key_hex
  90
  91                         account.password = nil;
  92                         return datamanager.store(username, host, "accounts", account);
  93                 end
  94                 return nil, "Account not available.";
  95         end
  96
  97         function provider.user_exists(username)
  98                 local account = datamanager.load(username, host, "accounts");
  99                 if not account then
 100                         log("debug", "account not found for username '%s' at host '%s'", username, module.host);
 101                         return nil, "Auth failed. Invalid username";
 102                 end
 103                 if (account.hashpass == nil or string.len(account.hashpass) == 0) and (account.password == nil or string.len(account.password) == 0) then
 104                         log("debug", "account password not set or zero-length for username '%s' at host '%s'", username, module.host);
 105                         return nil, "Auth failed. Password invalid.";
 106                 end
 107                 return true;
 108         end
 109
 110         function provider.create_user(username, password)
 111                 local salt = generate_uuid();
 112                 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, salt, iteration_count);
 113                 local stored_key_hex = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
 114                 local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
 115                 return datamanager.store(username, host, "accounts", {stored_key = stored_key_hex, server_key = server_key_hex, salt = salt, iteration_count = iteration_count});
 116         end
 117
 118         function provider.get_sasl_handler()
 119                 local realm = module:get_option("sasl_realm") or module.host;
 120                 local testpass_authentication_profile = {
 121                         plain_test = function(username, password, realm)
 122                                 local prepped_username = nodeprep(username);
 123                                 if not prepped_username then
 124                                         log("debug", "NODEprep failed on username: %s", username);
 125                                         return "", nil;
 126                                 end
 127                                 return usermanager.test_password(prepped_username, password, realm), true;
 128                         end,
 129                         scram_sha_1 = function(username, realm)
 130                                 local credentials = datamanager.load(username, host, "accounts") or {};
 131                                 if credentials.password then
 132                                         usermanager.set_password(username, credentials.password, host);
 133                                         credentials = datamanager.load(username, host, "accounts") or {};
 134                                 end
 135
 136                                 -- convert hexpass to stored_key and server_key
 137                                 -- TODO: remove this in near future
 138                                 if credentials.hashpass then
 139                                         local salted_password = credentials.hashpass:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
 140                                         credentials.stored_key = sha1(hmac_sha1(salted_password, "Client Key")):gsub(".", function (c) return ("%02x"):format(c:byte()); end);
 141                                         credentials.server_key = hmac_sha1(salted_password, "Server Key"):gsub(".", function (c) return ("%02x"):format(c:byte()); end);
 142                                         credentials.hashpass = nil
 143                                         datamanager.store(username, host, "accounts", credentials);
 144                                 end
 145
 146                                 local stored_key, server_key, iteration_count, salt = credentials.stored_key, credentials.server_key, credentials.iteration_count, credentials.salt;
 147                                 stored_key = stored_key and stored_key:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
 148                                 server_key = server_key and server_key:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
 149                                 return stored_key, server_key, iteration_count, salt, true;
 150                         end
 151                 };
 152                 return new_sasl(realm, testpass_authentication_profile);
 153         end
 154
 155         function provider.is_admin(jid)
 156                 local admins = module:get_option_array("admins");
 157                 if admins ~= config.get("*", "core", "admins") and type(admins) == "table" then
 158                         jid = jid_bare(jid);
 159                         for _,admin in ipairs(admins) do
 160                                 if admin == jid then return true; end
 161                         end
 162                 end
 163         end
 164         return provider;
 165 end
 166
 167 module:add_item("auth-provider", new_hashpass_provider(module.host));
 168