prosody
fba042a2c228
plugins/mod_auth_internal_hashed.lua

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plugins/mod_auth_internal_hashed.lua @ 5350:fba042a2c228

certs/openssl.cnf: Update XMPP-Core references to reflect RFC publication
author Kim Alvefur <zash@zash.se>
date Fri, 15 Mar 2013 09:51:43 +0100
parent 5302:52fe5df91c65
child 5500:eeea0eb2602a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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("auth_internal_hashed");
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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
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17 local to_hex;
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18 do
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19 local function replace_byte_with_hex(byte)
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20 return ("%02x"):format(byte:byte());
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21 end
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22 function to_hex(binary_string)
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23 return binary_string:gsub(".", replace_byte_with_hex);
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24 end
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25 end
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26
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27 local from_hex;
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28 do
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29 local function replace_hex_with_byte(hex)
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30 return string.char(tonumber(hex, 16));
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31 end
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32 function from_hex(hex_string)
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33 return hex_string:gsub("..", replace_hex_with_byte);
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34 end
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35 end
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36
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37
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38 -- Default; can be set per-user
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39 local iteration_count = 4096;
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40
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41 local host = module.host;
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42 -- define auth provider
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43 local provider = {};
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44 log("debug", "initializing internal_hashed authentication provider for host '%s'", host);
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45
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46 function provider.test_password(username, password)
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47 local credentials = datamanager.load(username, host, "accounts") or {};
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48
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49 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
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50 if credentials.password ~= password then
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51 return nil, "Auth failed. Provided password is incorrect.";
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52 end
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53
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54 if provider.set_password(username, credentials.password) == nil then
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55 return nil, "Auth failed. Could not set hashed password from plaintext.";
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56 else
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57 return true;
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58 end
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59 end
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60
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61 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
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62 return nil, "Auth failed. Stored salt and iteration count information is not complete.";
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63 end
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64
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65 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
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66
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67 local stored_key_hex = to_hex(stored_key);
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68 local server_key_hex = to_hex(server_key);
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69
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70 if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key then
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71 return true;
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72 else
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73 return nil, "Auth failed. Invalid username, password, or password hash information.";
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74 end
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75 end
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76
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77 function provider.set_password(username, password)
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78 local account = datamanager.load(username, host, "accounts");
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79 if account then
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80 account.salt = account.salt or generate_uuid();
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81 account.iteration_count = account.iteration_count or iteration_count;
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82 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, account.salt, account.iteration_count);
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83 local stored_key_hex = to_hex(stored_key);
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84 local server_key_hex = to_hex(server_key);
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85
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86 account.stored_key = stored_key_hex
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87 account.server_key = server_key_hex
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88
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89 account.password = nil;
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90 return datamanager.store(username, host, "accounts", account);
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91 end
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92 return nil, "Account not available.";
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93 end
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94
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95 function provider.user_exists(username)
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96 local account = datamanager.load(username, host, "accounts");
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97 if not account then
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98 log("debug", "account not found for username '%s' at host '%s'", username, host);
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99 return nil, "Auth failed. Invalid username";
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100 end
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101 return true;
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102 end
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103
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104 function provider.users()
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105 return datamanager.users(host, "accounts");
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106 end
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107
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108 function provider.create_user(username, password)
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109 if password == nil then
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110 return datamanager.store(username, host, "accounts", {});
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111 end
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112 local salt = generate_uuid();
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113 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, salt, iteration_count);
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114 local stored_key_hex = to_hex(stored_key);
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115 local server_key_hex = to_hex(server_key);
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116 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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117 end
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118
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119 function provider.delete_user(username)
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120 return datamanager.store(username, host, "accounts", nil);
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121 end
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122
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123 function provider.get_sasl_handler()
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124 local testpass_authentication_profile = {
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125 plain_test = function(sasl, username, password, realm)
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126 return usermanager.test_password(username, realm, password), true;
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127 end,
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128 scram_sha_1 = function(sasl, username, realm)
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129 local credentials = datamanager.load(username, host, "accounts");
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130 if not credentials then return; end
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131 if credentials.password then
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132 usermanager.set_password(username, credentials.password, host);
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133 credentials = datamanager.load(username, host, "accounts");
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134 if not credentials then return; end
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135 end
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136
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137 local stored_key, server_key, iteration_count, salt = credentials.stored_key, credentials.server_key, credentials.iteration_count, credentials.salt;
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138 stored_key = stored_key and from_hex(stored_key);
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139 server_key = server_key and from_hex(server_key);
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140 return stored_key, server_key, iteration_count, salt, true;
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141 end
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142 };
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143 return new_sasl(host, testpass_authentication_profile);
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144 end
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145
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146 module:provides("auth", provider);
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147