prosody
d935a0f0de24
plugins/mod_auth_internal_hashed.lua

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plugins/mod_auth_internal_hashed.lua @ 9830:d935a0f0de24

MUC: Factor out role change permission check into its own method I would like to invert this logic so that it checks if the role change is allowed instead of checking if it is not allowed as it does now, in order to make it easier to understand.
author Kim Alvefur <zash@zash.se>
date Sun, 24 Feb 2019 16:18:30 +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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22 local accounts = module:open_store("accounts");
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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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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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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