prosody
0d7d71dee0a0
plugins/mod_auth_internal_hashed.lua

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plugins/mod_auth_internal_hashed.lua @ 10914:0d7d71dee0a0 0.11

mod_auth_internal_*: Apply saslprep to passwords Related to #1560
author Kim Alvefur <zash@zash.se>
date Sat, 23 May 2020 14:17:04 +0200
parent 10522:b1ca849b8e3a
child 10916:c7ed8f754033
child 11544:c98aebe601f9
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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 max = math.max;
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11
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12 local getAuthenticationDatabaseSHA1 = require "util.sasl.scram".getAuthenticationDatabaseSHA1;
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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 local saslprep = require "util.encodings".stringprep.saslprep;
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19
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20 local log = module._log;
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21 local host = module.host;
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23 local accounts = module:open_store("accounts");
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26
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27 -- Default; can be set per-user
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28 local default_iteration_count = 4096;
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30 -- define auth provider
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31 local provider = {};
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33 function provider.test_password(username, password)
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34 log("debug", "test password for user '%s'", username);
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35 local credentials = accounts:get(username) or {};
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36 password = saslprep(password);
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37 if not password then
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38 return nil, "Password fails SASLprep.";
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39 end
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40
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41 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
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42 if saslprep(credentials.password) ~= password then
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43 return nil, "Auth failed. Provided password is incorrect.";
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44 end
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45
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46 if provider.set_password(username, credentials.password) == nil then
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47 return nil, "Auth failed. Could not set hashed password from plaintext.";
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48 else
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49 return true;
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50 end
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51 end
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52
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53 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
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54 return nil, "Auth failed. Stored salt and iteration count information is not complete.";
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55 end
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56
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57 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
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58
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59 local stored_key_hex = to_hex(stored_key);
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60 local server_key_hex = to_hex(server_key);
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61
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62 if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key then
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63 return true;
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64 else
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65 return nil, "Auth failed. Invalid username, password, or password hash information.";
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66 end
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67 end
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68
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69 function provider.set_password(username, password)
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70 log("debug", "set_password for username '%s'", username);
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71 local account = accounts:get(username);
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72 if account then
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73 account.salt = generate_uuid();
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74 account.iteration_count = max(account.iteration_count or 0, default_iteration_count);
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75 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, account.salt, account.iteration_count);
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76 if not valid then
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77 return valid, stored_key;
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78 end
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79 local stored_key_hex = to_hex(stored_key);
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80 local server_key_hex = to_hex(server_key);
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81
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82 account.stored_key = stored_key_hex
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83 account.server_key = server_key_hex
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84
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85 account.password = nil;
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86 return accounts:set(username, account);
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87 end
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88 return nil, "Account not available.";
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89 end
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90
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91 function provider.user_exists(username)
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92 local account = accounts:get(username);
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93 if not account then
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94 log("debug", "account not found for username '%s'", username);
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95 return nil, "Auth failed. Invalid username";
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96 end
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97 return true;
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98 end
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99
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100 function provider.users()
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101 return accounts:users();
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102 end
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103
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104 function provider.create_user(username, password)
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105 if password == nil then
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106 return accounts:set(username, {});
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107 end
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108 local salt = generate_uuid();
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109 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, salt, default_iteration_count);
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110 if not valid then
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111 return valid, stored_key;
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112 end
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113 local stored_key_hex = to_hex(stored_key);
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114 local server_key_hex = to_hex(server_key);
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115 return accounts:set(username, {
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116 stored_key = stored_key_hex, server_key = server_key_hex,
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117 salt = salt, iteration_count = default_iteration_count
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118 });
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119 end
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120
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121 function provider.delete_user(username)
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122 return accounts:set(username, nil);
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123 end
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124
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125 function provider.get_sasl_handler()
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126 local testpass_authentication_profile = {
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127 plain_test = function(_, username, password, realm)
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128 return usermanager.test_password(username, realm, password), true;
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129 end,
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130 scram_sha_1 = function(_, username)
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131 local credentials = accounts:get(username);
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132 if not credentials then return; end
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133 if credentials.password then
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134 if provider.set_password(username, credentials.password) == nil then
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135 return nil, "Auth failed. Could not set hashed password from plaintext.";
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136 end
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diff changeset
137 credentials = accounts:get(username);
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138 if not credentials then return; end
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139 end
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Florian Zeitz <florob@babelmonkeys.de>
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140
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diff changeset
141 local stored_key, server_key = credentials.stored_key, credentials.server_key;
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142 local iteration_count, salt = credentials.iteration_count, credentials.salt;
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143 stored_key = stored_key and from_hex(stored_key);
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144 server_key = server_key and from_hex(server_key);
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145 return stored_key, server_key, iteration_count, salt, true;
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146 end
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147 };
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148 return new_sasl(host, testpass_authentication_profile);
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149 end
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diff changeset
150
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diff changeset
151 module:provides("auth", provider);
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152