prosody
03b50f5bd8cd
plugins/mod_auth_internal_hashed.lua

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plugins/mod_auth_internal_hashed.lua @ 9421:03b50f5bd8cd

configure: Replace logic constructs with explicit if/else statements
author Matthew Wild <mwild1@gmail.com>
date Mon, 01 Oct 2018 15:32:47 +0100
parent 8192:4354f556c5db
child 10218:e458578ddfd3
child 10522:b1ca849b8e3a
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 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
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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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25
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26 -- Default; can be set per-user
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27 local default_iteration_count = 4096;
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29 -- define auth provider
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30 local provider = {};
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32 function provider.test_password(username, password)
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33 log("debug", "test password for user '%s'", username);
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34 local credentials = accounts:get(username) or {};
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36 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
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37 if credentials.password ~= password then
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38 return nil, "Auth failed. Provided password is incorrect.";
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39 end
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41 if provider.set_password(username, credentials.password) == nil then
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42 return nil, "Auth failed. Could not set hashed password from plaintext.";
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43 else
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44 return true;
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45 end
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46 end
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47
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48 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
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49 return nil, "Auth failed. Stored salt and iteration count information is not complete.";
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50 end
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51
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52 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, credentials.salt, credentials.iteration_count);
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53
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54 local stored_key_hex = to_hex(stored_key);
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55 local server_key_hex = to_hex(server_key);
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56
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57 if valid and stored_key_hex == credentials.stored_key and server_key_hex == credentials.server_key then
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58 return true;
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59 else
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60 return nil, "Auth failed. Invalid username, password, or password hash information.";
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61 end
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62 end
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63
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64 function provider.set_password(username, password)
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65 log("debug", "set_password for username '%s'", username);
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66 local account = accounts:get(username);
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67 if account then
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68 account.salt = generate_uuid();
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69 account.iteration_count = max(account.iteration_count or 0, default_iteration_count);
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70 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, account.salt, account.iteration_count);
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71 local stored_key_hex = to_hex(stored_key);
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72 local server_key_hex = to_hex(server_key);
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73
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74 account.stored_key = stored_key_hex
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75 account.server_key = server_key_hex
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76
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77 account.password = nil;
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78 return accounts:set(username, account);
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79 end
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80 return nil, "Account not available.";
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81 end
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82
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83 function provider.user_exists(username)
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84 local account = accounts:get(username);
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85 if not account then
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86 log("debug", "account not found for username '%s'", username);
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87 return nil, "Auth failed. Invalid username";
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88 end
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89 return true;
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90 end
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91
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92 function provider.users()
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93 return accounts:users();
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94 end
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95
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96 function provider.create_user(username, password)
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97 if password == nil then
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98 return accounts:set(username, {});
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99 end
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100 local salt = generate_uuid();
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101 local valid, stored_key, server_key = getAuthenticationDatabaseSHA1(password, salt, default_iteration_count);
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102 local stored_key_hex = to_hex(stored_key);
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103 local server_key_hex = to_hex(server_key);
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104 return accounts:set(username, {
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105 stored_key = stored_key_hex, server_key = server_key_hex,
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106 salt = salt, iteration_count = default_iteration_count
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107 });
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108 end
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109
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110 function provider.delete_user(username)
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111 return accounts:set(username, nil);
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112 end
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113
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114 function provider.get_sasl_handler()
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115 local testpass_authentication_profile = {
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116 plain_test = function(_, username, password, realm)
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117 return usermanager.test_password(username, realm, password), true;
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118 end,
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119 scram_sha_1 = function(_, username)
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120 local credentials = accounts:get(username);
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121 if not credentials then return; end
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122 if credentials.password then
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123 if provider.set_password(username, credentials.password) == nil then
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124 return nil, "Auth failed. Could not set hashed password from plaintext.";
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125 end
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126 credentials = accounts:get(username);
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127 if not credentials then return; end
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128 end
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129
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130 local stored_key, server_key = credentials.stored_key, credentials.server_key;
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131 local iteration_count, salt = credentials.iteration_count, credentials.salt;
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132 stored_key = stored_key and from_hex(stored_key);
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133 server_key = server_key and from_hex(server_key);
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134 return stored_key, server_key, iteration_count, salt, true;
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135 end
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136 };
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137 return new_sasl(host, testpass_authentication_profile);
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138 end
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139
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140 module:provides("auth", provider);
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141