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plugins/mod_auth_internal_hashed.lua @ 10364:66943afdd7f3
mod_register_limits: Use util.error for managing rejection reasons
author | Kim Alvefur <zash@zash.se> |
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date | Fri, 01 Nov 2019 18:11:58 +0100 |
parent | 10219:d58925bb74ca |
child | 10563:e8db377a2983 |
rev | line source |
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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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mod_auth_interal_hashed: Update salt and iteration count when setting a new password
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10 local max = math.max; |
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11 |
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12 local scram_hashers = require "util.sasl.scram".hashers; |
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13 local usermanager = require "core.usermanager"; |
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14 local generate_uuid = require "util.uuid".generate; |
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15 local new_sasl = require "util.sasl".new; |
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16 local hex = require"util.hex"; |
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17 local to_hex, from_hex = hex.to, hex.from; |
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18 |
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mod_auth_internal_hashed: Use logger setup by moduleapi instead of going for util.logger directly
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19 local log = module._log; |
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20 local host = module.host; |
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21 |
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22 local accounts = module:open_store("accounts"); |
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23 |
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24 local hash_name = module:get_option_string("password_hash", "SHA-1"); |
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25 local get_auth_db = assert(scram_hashers[hash_name], "SCRAM-"..hash_name.." not supported by SASL library"); |
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26 local scram_name = "scram_"..hash_name:gsub("%-","_"):lower(); |
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27 |
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28 -- Default; can be set per-user |
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29 local default_iteration_count = 4096; |
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30 |
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31 -- define auth provider |
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32 local provider = {}; |
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33 |
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34 function provider.test_password(username, password) |
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35 log("debug", "test password for user '%s'", username); |
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36 local credentials = accounts:get(username) or {}; |
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37 |
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38 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then |
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39 if credentials.password ~= password then |
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40 return nil, "Auth failed. Provided password is incorrect."; |
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41 end |
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42 |
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43 if provider.set_password(username, credentials.password) == nil then |
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44 return nil, "Auth failed. Could not set hashed password from plaintext."; |
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45 else |
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46 return true; |
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47 end |
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48 end |
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49 |
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50 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then |
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51 return nil, "Auth failed. Stored salt and iteration count information is not complete."; |
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52 end |
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53 |
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54 local valid, stored_key, server_key = get_auth_db(password, credentials.salt, credentials.iteration_count); |
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55 |
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56 local stored_key_hex = to_hex(stored_key); |
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57 local server_key_hex = to_hex(server_key); |
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58 |
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59 if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key then |
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60 return true; |
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61 else |
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62 return nil, "Auth failed. Invalid username, password, or password hash information."; |
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63 end |
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64 end |
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65 |
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66 function provider.set_password(username, password) |
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67 log("debug", "set_password for username '%s'", username); |
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68 local account = accounts:get(username); |
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69 if account then |
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70 account.salt = generate_uuid(); |
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71 account.iteration_count = max(account.iteration_count or 0, default_iteration_count); |
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72 local valid, stored_key, server_key = get_auth_db(password, account.salt, account.iteration_count); |
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73 local stored_key_hex = to_hex(stored_key); |
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74 local server_key_hex = to_hex(server_key); |
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75 |
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76 account.stored_key = stored_key_hex |
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77 account.server_key = server_key_hex |
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78 |
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79 account.password = nil; |
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80 return accounts:set(username, account); |
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81 end |
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82 return nil, "Account not available."; |
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83 end |
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84 |
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85 function provider.user_exists(username) |
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86 local account = accounts:get(username); |
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87 if not account then |
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88 log("debug", "account not found for username '%s'", username); |
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89 return nil, "Auth failed. Invalid username"; |
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90 end |
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91 return true; |
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92 end |
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93 |
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94 function provider.users() |
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95 return accounts:users(); |
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96 end |
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97 |
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98 function provider.create_user(username, password) |
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99 if password == nil then |
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100 return accounts:set(username, {}); |
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101 end |
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102 local salt = generate_uuid(); |
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103 local valid, stored_key, server_key = get_auth_db(password, salt, default_iteration_count); |
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104 local stored_key_hex = to_hex(stored_key); |
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105 local server_key_hex = to_hex(server_key); |
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106 return accounts:set(username, { |
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107 stored_key = stored_key_hex, server_key = server_key_hex, |
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108 salt = salt, iteration_count = default_iteration_count |
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109 }); |
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110 end |
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111 |
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112 function provider.delete_user(username) |
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113 return accounts:set(username, nil); |
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114 end |
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115 |
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116 function provider.get_sasl_handler() |
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117 local testpass_authentication_profile = { |
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118 plain_test = function(_, username, password, realm) |
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119 return usermanager.test_password(username, realm, password), true; |
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120 end, |
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121 [scram_name] = function(_, username) |
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122 local credentials = accounts:get(username); |
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123 if not credentials then return; end |
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124 if credentials.password then |
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125 if provider.set_password(username, credentials.password) == nil then |
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126 return nil, "Auth failed. Could not set hashed password from plaintext."; |
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127 end |
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128 credentials = accounts:get(username); |
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129 if not credentials then return; end |
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130 end |
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131 |
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132 local stored_key, server_key = credentials.stored_key, credentials.server_key; |
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133 local iteration_count, salt = credentials.iteration_count, credentials.salt; |
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134 stored_key = stored_key and from_hex(stored_key); |
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135 server_key = server_key and from_hex(server_key); |
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136 return stored_key, server_key, iteration_count, salt, true; |
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137 end |
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138 }; |
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139 return new_sasl(host, testpass_authentication_profile); |
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140 end |
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141 |
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142 module:provides("auth", provider); |
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143 |