prosody
4b660bf61048
plugins/mod_auth_internal_hashed.lua

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plugins/mod_auth_internal_hashed.lua @ 3208:4b660bf61048

mod_auth_internal_hashed: Coverting salted password to stored_key and server_key.
author Tobias Markmann <tm@ayena.de>
date Tue, 08 Jun 2010 15:02:53 +0200
parent 3207:b350d9753804
child 3210:5e51f8a7179b
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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db9def53fe9c Check in mod_hashpassauth -- works!
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1 -- Prosody IM
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2 -- Copyright (C) 2008-2010 Matthew Wild
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3 -- Copyright (C) 2008-2010 Waqas Hussain
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4 -- Copyright (C) 2010 Jeff Mitchell
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5 --
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6 -- This project is MIT/X11 licensed. Please see the
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7 -- COPYING file in the source package for more information.
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8 --
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9
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10 local datamanager = require "util.datamanager";
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11 local log = require "util.logger".init("usermanager");
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12 local type = type;
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13 local error = error;
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14 local ipairs = ipairs;
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15 local hashes = require "util.hashes";
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16 local jid_bare = require "util.jid".bare;
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17 local getAuthenticationDatabaseSHA1 = require "util.sasl.scram".getAuthenticationDatabaseSHA1;
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18 local config = require "core.configmanager";
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19 local usermanager = require "core.usermanager";
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20 local generate_uuid = require "util.uuid".generate;
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21 local new_sasl = require "util.sasl".new;
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22 local nodeprep = require "util.encodings".stringprep.nodeprep;
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23 local hosts = hosts;
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24
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25 -- TODO: remove these two lines in near future
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26 local hmac_sha1 = require "util.hmac".sha1;
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27 local sha1 = require "util.hashes".sha1;
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28
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29 local prosody = _G.prosody;
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30
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31 local is_cyrus = usermanager.is_cyrus;
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32
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33 -- Default; can be set per-user
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34 local iteration_count = 4096;
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35
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36 function new_hashpass_provider(host)
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37 local provider = { name = "internal_hashed" };
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38 log("debug", "initializing hashpass authentication provider for host '%s'", host);
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39
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40 function provider.test_password(username, password)
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41 if is_cyrus(host) then return nil, "Legacy auth not supported with Cyrus SASL."; end
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42 local credentials = datamanager.load(username, host, "accounts") or {};
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43
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44 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
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45 if credentials.password ~= password then
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46 return nil, "Auth failed. Provided password is incorrect.";
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47 end
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48
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49 if provider.set_password(username, credentials.password) == nil then
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50 return nil, "Auth failed. Could not set hashed password from plaintext.";
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51 else
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52 return true;
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53 end
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54 end
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55
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56 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
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57 return nil, "Auth failed. Stored salt and iteration count information is not complete.";
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58 end
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59
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60 local valid, stored_key, server_key
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61
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62 if credentials.hexpass then
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63 -- convert hexpass to stored_key and server_key
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64 -- TODO: remove this in near future
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65 valid = true;
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66 local salted_password = credentials.hexpass:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
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67
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68 stored_key = sha1(hmac_sha1(salted_password, "Client Key"))
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69 server_key = hmac_sha1(salted_password, "Server Key");
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70 else
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71 valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
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72 end
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73
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74 local stored_key_hex = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
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75 local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
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76
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77 if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key_hex then
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78 return true;
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79 else
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80 return nil, "Auth failed. Invalid username, password, or password hash information.";
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81 end
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82 end
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83
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84 function provider.set_password(username, password)
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85 if is_cyrus(host) then return nil, "Passwords unavailable for Cyrus SASL."; end
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86 local account = datamanager.load(username, host, "accounts");
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87 if account then
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88 if account.iteration_count == nil then
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89 account.iteration_count = iteration_count;
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90 end
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91
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92 if account.salt == nil then
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93 account.salt = generate_uuid();
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94 end
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95
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96 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
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97 local stored_key_hex = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
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98 local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
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99
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100 account.stored_key = stored_key_hex
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101 account.server_key = server_key_hex
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102
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103 account.password = nil;
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104 return datamanager.store(username, host, "accounts", account);
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105 end
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106 return nil, "Account not available.";
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107 end
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108
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109 function provider.user_exists(username)
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110 if is_cyrus(host) then return true; end
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111 local account = datamanager.load(username, host, "accounts");
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112 if not account then
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113 log("debug", "account not found for username '%s' at host '%s'", username, module.host);
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114 return nil, "Auth failed. Invalid username";
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115 end
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116 if (account.hashpass == nil or string.len(account.hashpass) == 0) and (account.password == nil or string.len(account.password) == 0) then
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117 log("debug", "account password not set or zero-length for username '%s' at host '%s'", username, module.host);
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118 return nil, "Auth failed. Password invalid.";
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119 end
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120 return true;
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121 end
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122
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123 function provider.create_user(username, password)
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124 if is_cyrus(host) then return nil, "Account creation/modification not available with Cyrus SASL."; end
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125 local salt = generate_uuid();
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126 local valid, stored_key, server_key = saltedPasswordSHA1(password, salt, iteration_count);
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127 local stored_key_hex = stored_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
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128 local server_key_hex = server_key:gsub(".", function (c) return ("%02x"):format(c:byte()); end);
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129 return datamanager.store(username, host, "accounts", {stored_key = stored_key_hex, server_key = server_key_hex, salt = salt, iteration_count = iteration_count});
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130 end
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131
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132 function provider.get_sasl_handler()
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133 local realm = module:get_option("sasl_realm") or module.host;
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134 local testpass_authentication_profile = {
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135 plain_test = function(username, password, realm)
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136 local prepped_username = nodeprep(username);
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137 if not prepped_username then
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138 log("debug", "NODEprep failed on username: %s", username);
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139 return "", nil;
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140 end
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141 return usermanager.test_password(prepped_username, password, realm), true;
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142 end,
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143 scram_sha_1 = function(username, realm)
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144 local credentials = datamanager.load(username, host, "accounts") or {};
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145 if credentials.password then
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146 usermanager.set_password(username, credentials.password);
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147 credentials = datamanager.load(username, host, "accounts") or {};
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148 end
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149 local stored_key, server_key, iteration_count, salt = credentials.stored_key, credentials.server_key, credentials.iteration_count, credentials.salt;
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150 stored_key = stored_key and stored_key:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
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151 server_key = server_key and server_key:gsub("..", function(x) return string.char(tonumber(x, 16)); end);
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152 return stored_key, server_key, iteration_count, salt, true;
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153 end
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154 };
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155 return new_sasl(realm, testpass_authentication_profile);
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156 end
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157
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158 function provider.is_admin(jid)
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159 local admins = config.get(host, "core", "admins");
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160 if admins ~= config.get("*", "core", "admins") and type(admins) == "table" then
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161 jid = jid_bare(jid);
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162 for _,admin in ipairs(admins) do
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163 if admin == jid then return true; end
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164 end
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165 elseif admins then
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166 log("error", "Option 'admins' for host '%s' is not a table", host);
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167 end
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168 return is_admin(jid); -- Test whether it's a global admin instead
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169 end
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170 return provider;
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171 end
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172
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173 module:add_item("auth-provider", new_hashpass_provider(module.host));
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174