prosody
eda2556aa139
plugins/mod_auth_internal_hashed.lua

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plugins/mod_auth_internal_hashed.lua @ 5914:eda2556aa139

Merge 0.10->trunk
author Kim Alvefur <zash@zash.se>
date Mon, 11 Nov 2013 23:28:53 +0100
parent 5784:02217725454b
child 6019:e9147a16059d
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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 getAuthenticationDatabaseSHA1 = require "util.sasl.scram".getAuthenticationDatabaseSHA1;
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11 local usermanager = require "core.usermanager";
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12 local generate_uuid = require "util.uuid".generate;
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13 local new_sasl = require "util.sasl".new;
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14
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15 local log = module._log;
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16 local host = module.host;
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17
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18 local accounts = module:open_store("accounts");
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19
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20 local to_hex;
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21 do
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22 local function replace_byte_with_hex(byte)
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23 return ("%02x"):format(byte:byte());
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24 end
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25 function to_hex(binary_string)
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26 return binary_string:gsub(".", replace_byte_with_hex);
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27 end
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28 end
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29
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30 local from_hex;
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31 do
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32 local function replace_hex_with_byte(hex)
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33 return string.char(tonumber(hex, 16));
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34 end
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35 function from_hex(hex_string)
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36 return hex_string:gsub("..", replace_hex_with_byte);
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37 end
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38 end
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39
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40
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41 -- Default; can be set per-user
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42 local iteration_count = 4096;
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43
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44 -- define auth provider
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45 local provider = {};
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46
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47 function provider.test_password(username, password)
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48 log("debug", "test password for user '%s'", username);
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49 local credentials = accounts:get(username) or {};
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50
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51 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
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52 if credentials.password ~= password then
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53 return nil, "Auth failed. Provided password is incorrect.";
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54 end
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55
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56 if provider.set_password(username, credentials.password) == nil then
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57 return nil, "Auth failed. Could not set hashed password from plaintext.";
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58 else
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59 return true;
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60 end
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61 end
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62
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63 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
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64 return nil, "Auth failed. Stored salt and iteration count information is not complete.";
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65 end
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66
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67 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
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68
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69 local stored_key_hex = to_hex(stored_key);
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70 local server_key_hex = to_hex(server_key);
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71
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72 if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key then
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73 return true;
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74 else
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75 return nil, "Auth failed. Invalid username, password, or password hash information.";
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76 end
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77 end
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78
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79 function provider.set_password(username, password)
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80 log("debug", "set_password for username '%s'", username);
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81 local account = accounts:get(username);
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82 if account then
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83 account.salt = account.salt or generate_uuid();
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84 account.iteration_count = account.iteration_count or iteration_count;
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85 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, account.salt, account.iteration_count);
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86 local stored_key_hex = to_hex(stored_key);
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87 local server_key_hex = to_hex(server_key);
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88
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89 account.stored_key = stored_key_hex
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90 account.server_key = server_key_hex
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91
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92 account.password = nil;
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93 return accounts:set(username, account);
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94 end
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95 return nil, "Account not available.";
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96 end
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97
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98 function provider.user_exists(username)
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99 local account = accounts:get(username);
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100 if not account then
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101 log("debug", "account not found for username '%s'", username);
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102 return nil, "Auth failed. Invalid username";
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103 end
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104 return true;
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105 end
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106
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107 function provider.users()
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108 return accounts:users();
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109 end
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110
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111 function provider.create_user(username, password)
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112 if password == nil then
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113 return accounts:set(username, {});
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114 end
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115 local salt = generate_uuid();
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116 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, salt, iteration_count);
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117 local stored_key_hex = to_hex(stored_key);
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118 local server_key_hex = to_hex(server_key);
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119 return accounts:set(username, {stored_key = stored_key_hex, server_key = server_key_hex, salt = salt, iteration_count = iteration_count});
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120 end
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121
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122 function provider.delete_user(username)
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123 return accounts:set(username, nil);
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124 end
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125
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126 function provider.get_sasl_handler()
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127 local testpass_authentication_profile = {
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128 plain_test = function(sasl, username, password, realm)
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129 return usermanager.test_password(username, realm, password), true;
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130 end,
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131 scram_sha_1 = function(sasl, username, realm)
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132 local credentials = accounts:get(username);
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133 if not credentials then return; end
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134 if credentials.password then
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135 usermanager.set_password(username, credentials.password, host);
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136 credentials = accounts:get(username);
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137 if not credentials then return; end
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138 end
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139
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140 local stored_key, server_key, iteration_count, salt = credentials.stored_key, credentials.server_key, credentials.iteration_count, credentials.salt;
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141 stored_key = stored_key and from_hex(stored_key);
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142 server_key = server_key and from_hex(server_key);
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143 return stored_key, server_key, iteration_count, salt, true;
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144 end
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145 };
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146 return new_sasl(host, testpass_authentication_profile);
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147 end
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148
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149 module:provides("auth", provider);
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150