prosody
7ae000fc8c07
plugins/mod_auth_ldap.lua

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plugins/mod_auth_ldap.lua @ 13267:7ae000fc8c07 0.12

mod_muc_mam: Improve wording of enable setting Suggested by jstein in the chat This option label is used by XMPP clients to explain what the option does. a) The user should know where the data is archived. b) The user needs a statement that can be enabled/disabled by the variable. A question would have the wrong logic here.
author Kim Alvefur <zash@zash.se>
date Sun, 15 Oct 2023 14:43:11 +0200
parent 11837:a37bf4497280
child 12642:9061f9621330
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
11837
a37bf4497280 mod_auth_ldap: Import from prosody-modules rev f52452911187
Kim Alvefur <zash@zash.se>
parents:
diff changeset
1 -- mod_auth_ldap
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2
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3 local jid_split = require "util.jid".split;
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4 local new_sasl = require "util.sasl".new;
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Kim Alvefur <zash@zash.se>
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5 local lualdap = require "lualdap";
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6
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7 local function ldap_filter_escape(s)
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parents:
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8 return (s:gsub("[*()\\%z]", function(c) return ("\\%02x"):format(c:byte()) end));
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9 end
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10
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Kim Alvefur <zash@zash.se>
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11 -- Config options
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12 local ldap_server = module:get_option_string("ldap_server", "localhost");
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Kim Alvefur <zash@zash.se>
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13 local ldap_rootdn = module:get_option_string("ldap_rootdn", "");
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Kim Alvefur <zash@zash.se>
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14 local ldap_password = module:get_option_string("ldap_password", "");
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Kim Alvefur <zash@zash.se>
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15 local ldap_tls = module:get_option_boolean("ldap_tls");
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Kim Alvefur <zash@zash.se>
parents:
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16 local ldap_scope = module:get_option_string("ldap_scope", "subtree");
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Kim Alvefur <zash@zash.se>
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17 local ldap_filter = module:get_option_string("ldap_filter", "(uid=$user)"):gsub("%%s", "$user", 1);
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Kim Alvefur <zash@zash.se>
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18 local ldap_base = assert(module:get_option_string("ldap_base"), "ldap_base is a required option for ldap");
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Kim Alvefur <zash@zash.se>
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19 local ldap_mode = module:get_option_string("ldap_mode", "bind");
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20 local ldap_admins = module:get_option_string("ldap_admin_filter",
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21 module:get_option_string("ldap_admins")); -- COMPAT with mistake in documentation
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22 local host = ldap_filter_escape(module:get_option_string("realm", module.host));
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23
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24 -- Initiate connection
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25 local ld = nil;
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26 module.unload = function() if ld then pcall(ld, ld.close); end end
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27
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28 function ldap_do_once(method, ...)
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29 if ld == nil then
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30 local err;
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31 ld, err = lualdap.open_simple(ldap_server, ldap_rootdn, ldap_password, ldap_tls);
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32 if not ld then return nil, err, "reconnect"; end
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33 end
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34
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35 -- luacheck: ignore 411/success
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36 local success, iterator, invariant, initial = pcall(ld[method], ld, ...);
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37 if not success then ld = nil; return nil, iterator, "search"; end
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38
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39 local success, dn, attr = pcall(iterator, invariant, initial);
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40 if not success then ld = nil; return success, dn, "iter"; end
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41
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42 return dn, attr, "return";
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43 end
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44
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45 function ldap_do(method, retry_count, ...)
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46 local dn, attr, where;
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47 for _=1,1+retry_count do
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48 dn, attr, where = ldap_do_once(method, ...);
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49 if dn or not(attr) then break; end -- nothing or something found
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50 module:log("warn", "LDAP: %s %s (in %s)", tostring(dn), tostring(attr), where);
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51 -- otherwise retry
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52 end
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53 if not dn and attr then
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54 module:log("error", "LDAP: %s", tostring(attr));
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55 end
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56 return dn, attr;
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57 end
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58
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59 function get_user(username)
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60 module:log("debug", "get_user(%q)", username);
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61 return ldap_do("search", 2, {
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62 base = ldap_base;
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63 scope = ldap_scope;
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64 sizelimit = 1;
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65 filter = ldap_filter:gsub("%$(%a+)", {
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66 user = ldap_filter_escape(username);
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67 host = host;
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68 });
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69 });
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70 end
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71
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72 local provider = {};
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73
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74 function provider.create_user(username, password) -- luacheck: ignore 212
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75 return nil, "Account creation not available with LDAP.";
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76 end
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77
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78 function provider.user_exists(username)
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79 return not not get_user(username);
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80 end
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81
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82 function provider.set_password(username, password)
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83 local dn, attr = get_user(username);
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84 if not dn then return nil, attr end
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85 if attr.userPassword == password then return true end
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86 return ldap_do("modify", 2, dn, { '=', userPassword = password });
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87 end
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88
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89 if ldap_mode == "getpasswd" then
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90 function provider.get_password(username)
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91 local dn, attr = get_user(username);
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92 if dn and attr then
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93 return attr.userPassword;
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94 end
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95 end
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96
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97 function provider.test_password(username, password)
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98 return provider.get_password(username) == password;
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99 end
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100
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101 function provider.get_sasl_handler()
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102 return new_sasl(module.host, {
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103 plain = function(sasl, username) -- luacheck: ignore 212/sasl
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104 local password = provider.get_password(username);
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105 if not password then return "", nil; end
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106 return password, true;
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107 end
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108 });
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109 end
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110 elseif ldap_mode == "bind" then
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111 local function test_password(userdn, password)
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112 local ok, err = lualdap.open_simple(ldap_server, userdn, password, ldap_tls);
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113 if not ok then
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114 module:log("debug", "ldap open_simple error: %s", err);
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115 end
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116 return not not ok;
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117 end
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118
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119 function provider.test_password(username, password)
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120 local dn = get_user(username);
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121 if not dn then return end
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122 return test_password(dn, password)
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123 end
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124
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125 function provider.get_sasl_handler()
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126 return new_sasl(module.host, {
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127 plain_test = function(sasl, username, password) -- luacheck: ignore 212/sasl
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128 return provider.test_password(username, password), true;
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129 end
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130 });
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131 end
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132 else
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133 module:log("error", "Unsupported ldap_mode %s", tostring(ldap_mode));
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134 end
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135
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136 if ldap_admins then
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137 function provider.is_admin(jid)
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138 local username, user_host = jid_split(jid);
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139 if user_host ~= module.host then
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140 return false;
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141 end
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142 return ldap_do("search", 2, {
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143 base = ldap_base;
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144 scope = ldap_scope;
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145 sizelimit = 1;
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146 filter = ldap_admins:gsub("%$(%a+)", {
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147 user = ldap_filter_escape(username);
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148 host = host;
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149 });
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150 });
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151 end
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152 end
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153
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154 module:provides("auth", provider);