prosody
1ac8976f09a9
plugins/mod_auth_internal_hashed.lua

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plugins/mod_auth_internal_hashed.lua @ 11614:1ac8976f09a9

mod_c2s: Add a Direct TLS listener This only differs from 'legacy_ssl' in name, at least on the server side. For clients this is the one that uses SRV records.
author Kim Alvefur <zash@zash.se>
date Sun, 20 Jun 2021 16:51:08 +0200
parent 11560:3bbb1af92514
child 12127:baa7cdde69a6
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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 scram_hashers = require "util.sasl.scram".hashers;
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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 local saslprep = require "util.encodings".stringprep.saslprep;
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19 local secure_equals = require "util.hashes".equals;
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20
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21 local log = module._log;
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22 local host = module.host;
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24 local accounts = module:open_store("accounts");
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26 local hash_name = module:get_option_string("password_hash", "SHA-1");
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27 local get_auth_db = assert(scram_hashers[hash_name], "SCRAM-"..hash_name.." not supported by SASL library");
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28 local scram_name = "scram_"..hash_name:gsub("%-","_"):lower();
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29
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30 -- Default; can be set per-user
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31 local default_iteration_count = 4096;
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33 -- define auth provider
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34 local provider = {};
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35
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36 function provider.test_password(username, password)
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37 log("debug", "test password for user '%s'", username);
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38 local credentials = accounts:get(username) or {};
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39 password = saslprep(password);
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40 if not password then
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41 return nil, "Password fails SASLprep.";
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42 end
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43
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44 if credentials.password ~= nil and string.len(credentials.password) ~= 0 then
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45 if not secure_equals(saslprep(credentials.password), password) then
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46 return nil, "Auth failed. Provided password is incorrect.";
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47 end
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48
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49 if provider.set_password(username, credentials.password) == nil then
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50 return nil, "Auth failed. Could not set hashed password from plaintext.";
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51 else
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52 return true;
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53 end
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54 end
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55
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56 if credentials.iteration_count == nil or credentials.salt == nil or string.len(credentials.salt) == 0 then
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57 return nil, "Auth failed. Stored salt and iteration count information is not complete.";
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58 end
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59
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60 local valid, stored_key, server_key = get_auth_db(password, credentials.salt, credentials.iteration_count);
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61
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62 local stored_key_hex = to_hex(stored_key);
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63 local server_key_hex = to_hex(server_key);
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64
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65 if valid and secure_equals(stored_key_hex, credentials.stored_key) and secure_equals(server_key_hex, credentials.server_key) then
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66 return true;
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67 else
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68 return nil, "Auth failed. Invalid username, password, or password hash information.";
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69 end
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70 end
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71
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72 function provider.set_password(username, password)
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73 log("debug", "set_password for username '%s'", username);
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74 local account = accounts:get(username);
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75 if account then
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76 account.salt = generate_uuid();
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77 account.iteration_count = max(account.iteration_count or 0, default_iteration_count);
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78 local valid, stored_key, server_key = get_auth_db(password, account.salt, account.iteration_count);
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79 if not valid then
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80 return valid, stored_key;
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81 end
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82 local stored_key_hex = to_hex(stored_key);
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83 local server_key_hex = to_hex(server_key);
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84
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85 account.stored_key = stored_key_hex
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86 account.server_key = server_key_hex
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87
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88 account.password = nil;
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89 return accounts:set(username, account);
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90 end
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91 return nil, "Account not available.";
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92 end
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93
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94 function provider.user_exists(username)
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95 local account = accounts:get(username);
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96 if not account then
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97 log("debug", "account not found for username '%s'", username);
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98 return nil, "Auth failed. Invalid username";
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99 end
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100 return true;
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101 end
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102
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103 function provider.users()
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104 return accounts:users();
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105 end
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106
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107 function provider.create_user(username, password)
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108 if password == nil then
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109 return accounts:set(username, {});
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110 end
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111 local salt = generate_uuid();
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112 local valid, stored_key, server_key = get_auth_db(password, salt, default_iteration_count);
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113 if not valid then
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114 return valid, stored_key;
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115 end
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116 local stored_key_hex = to_hex(stored_key);
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117 local server_key_hex = to_hex(server_key);
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118 return accounts:set(username, {
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119 stored_key = stored_key_hex, server_key = server_key_hex,
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120 salt = salt, iteration_count = default_iteration_count
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121 });
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parents:
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122 end
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parents:
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123
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124 function provider.delete_user(username)
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125 return accounts:set(username, nil);
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126 end
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parents:
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127
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128 function provider.get_sasl_handler()
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129 local testpass_authentication_profile = {
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Kim Alvefur <zash@zash.se>
parents: 6707
diff changeset
130 plain_test = function(_, username, password, realm)
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52fe5df91c65 mod_auth_internal_plain, mod_auth_internal_hashed: No need to nodeprep here.
Waqas Hussain <waqas20@gmail.com>
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131 return usermanager.test_password(username, realm, password), true;
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132 end,
10219
d58925bb74ca mod_auth_internal_hashed: Precompute SCRAM authentication profile name (thanks MattJ)
Kim Alvefur <zash@zash.se>
parents: 10218
diff changeset
133 [scram_name] = function(_, username)
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Kim Alvefur <zash@zash.se>
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diff changeset
134 local credentials = accounts:get(username);
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135 if not credentials then return; end
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parents: 4764
diff changeset
136 if credentials.password then
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Kim Alvefur <zash@zash.se>
parents: 8056
diff changeset
137 if provider.set_password(username, credentials.password) == nil then
4354f556c5db core.usermanager, various modules: Disconnect other resources on password change (thanks waqas) (fixes #512)
Kim Alvefur <zash@zash.se>
parents: 8056
diff changeset
138 return nil, "Auth failed. Could not set hashed password from plaintext.";
4354f556c5db core.usermanager, various modules: Disconnect other resources on password change (thanks waqas) (fixes #512)
Kim Alvefur <zash@zash.se>
parents: 8056
diff changeset
139 end
5500
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Kim Alvefur <zash@zash.se>
parents: 5302
diff changeset
140 credentials = accounts:get(username);
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diff changeset
141 if not credentials then return; end
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parents: 4764
diff changeset
142 end
5776
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Florian Zeitz <florob@babelmonkeys.de>
parents: 5500
diff changeset
143
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Kim Alvefur <zash@zash.se>
parents: 8055
diff changeset
144 local stored_key, server_key = credentials.stored_key, credentials.server_key;
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parents: 8055
diff changeset
145 local iteration_count, salt = credentials.iteration_count, credentials.salt;
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diff changeset
146 stored_key = stored_key and from_hex(stored_key);
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parents: 4764
diff changeset
147 server_key = server_key and from_hex(server_key);
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parents: 4764
diff changeset
148 return stored_key, server_key, iteration_count, salt, true;
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parents: 4764
diff changeset
149 end
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parents: 4764
diff changeset
150 };
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parents: 4764
diff changeset
151 return new_sasl(host, testpass_authentication_profile);
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parents: 4764
diff changeset
152 end
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Florian Zeitz <florob@babelmonkeys.de>
parents: 5500
diff changeset
153
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Waqas Hussain <waqas20@gmail.com>
parents: 5116
diff changeset
154 module:provides("auth", provider);
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parents: 4764
diff changeset
155