prosody
9afc94c4346e
plugins/mod_auth_internal_hashed.lua

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plugins/mod_auth_internal_hashed.lua @ 5677:9afc94c4346e

Merge 0.9->trunk
author Matthew Wild <mwild1@gmail.com>
date Thu, 13 Jun 2013 00:09:56 +0100
parent 5500:eeea0eb2602a
child 5776:bd0ff8ae98a8
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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 log = require "util.logger".init("auth_internal_hashed");
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11 local getAuthenticationDatabaseSHA1 = require "util.sasl.scram".getAuthenticationDatabaseSHA1;
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12 local usermanager = require "core.usermanager";
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13 local generate_uuid = require "util.uuid".generate;
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14 local new_sasl = require "util.sasl".new;
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15
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16 local accounts = module:open_store("accounts");
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17
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18 local to_hex;
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19 do
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20 local function replace_byte_with_hex(byte)
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21 return ("%02x"):format(byte:byte());
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22 end
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23 function to_hex(binary_string)
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24 return binary_string:gsub(".", replace_byte_with_hex);
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25 end
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26 end
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27
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28 local from_hex;
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29 do
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30 local function replace_hex_with_byte(hex)
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31 return string.char(tonumber(hex, 16));
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32 end
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33 function from_hex(hex_string)
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34 return hex_string:gsub("..", replace_hex_with_byte);
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35 end
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36 end
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38
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39 -- Default; can be set per-user
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40 local iteration_count = 4096;
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41
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42 local host = module.host;
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43 -- define auth provider
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44 local provider = {};
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45 log("debug", "initializing internal_hashed authentication provider for host '%s'", host);
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46
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47 function provider.test_password(username, password)
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48 local credentials = accounts:get(username) or {};
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49
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50 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
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51 if credentials.password ~= password then
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52 return nil, "Auth failed. Provided password is incorrect.";
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53 end
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54
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55 if provider.set_password(username, credentials.password) == nil then
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56 return nil, "Auth failed. Could not set hashed password from plaintext.";
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57 else
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58 return true;
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59 end
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60 end
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61
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62 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
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63 return nil, "Auth failed. Stored salt and iteration count information is not complete.";
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64 end
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65
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66 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
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67
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68 local stored_key_hex = to_hex(stored_key);
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69 local server_key_hex = to_hex(server_key);
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70
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71 if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key then
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72 return true;
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73 else
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74 return nil, "Auth failed. Invalid username, password, or password hash information.";
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75 end
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76 end
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77
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78 function provider.set_password(username, password)
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79 local account = accounts:get(username);
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80 if account then
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81 account.salt = account.salt or generate_uuid();
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82 account.iteration_count = account.iteration_count or iteration_count;
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83 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, account.salt, account.iteration_count);
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84 local stored_key_hex = to_hex(stored_key);
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85 local server_key_hex = to_hex(server_key);
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86
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87 account.stored_key = stored_key_hex
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88 account.server_key = server_key_hex
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89
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90 account.password = nil;
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91 return accounts:set(username, account);
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92 end
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93 return nil, "Account not available.";
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94 end
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95
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96 function provider.user_exists(username)
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97 local account = accounts:get(username);
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98 if not account then
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99 log("debug", "account not found for username '%s' at host '%s'", username, host);
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100 return nil, "Auth failed. Invalid username";
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101 end
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102 return true;
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103 end
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104
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105 function provider.users()
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106 return accounts:users();
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107 end
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108
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109 function provider.create_user(username, password)
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110 if password == nil then
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111 return accounts:set(username, {});
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112 end
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113 local salt = generate_uuid();
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114 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, salt, iteration_count);
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115 local stored_key_hex = to_hex(stored_key);
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116 local server_key_hex = to_hex(server_key);
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117 return accounts:set(username, {stored_key = stored_key_hex, server_key = server_key_hex, salt = salt, iteration_count = iteration_count});
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118 end
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119
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120 function provider.delete_user(username)
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121 return accounts:set(username, nil);
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122 end
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123
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124 function provider.get_sasl_handler()
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125 local testpass_authentication_profile = {
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126 plain_test = function(sasl, username, password, realm)
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127 return usermanager.test_password(username, realm, password), true;
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128 end,
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129 scram_sha_1 = function(sasl, username, realm)
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130 local credentials = accounts:get(username);
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131 if not credentials then return; end
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132 if credentials.password then
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133 usermanager.set_password(username, credentials.password, host);
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134 credentials = accounts:get(username);
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135 if not credentials then return; end
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136 end
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137
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138 local stored_key, server_key, iteration_count, salt = credentials.stored_key, credentials.server_key, credentials.iteration_count, credentials.salt;
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139 stored_key = stored_key and from_hex(stored_key);
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140 server_key = server_key and from_hex(server_key);
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141 return stored_key, server_key, iteration_count, salt, true;
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142 end
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143 };
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144 return new_sasl(host, testpass_authentication_profile);
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145 end
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146
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147 module:provides("auth", provider);
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148