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plugins/mod_auth_ldap.lua @ 12845:f306336b7e99
util.sqlite3: SQLite3-only variant of util.sql using LuaSQLite3
http://lua.sqlite.org/
author | Kim Alvefur <zash@zash.se> |
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date | Mon, 01 Aug 2022 15:23:33 +0200 |
parent | 12642:9061f9621330 |
child | 12977:74b9e05af71e |
rev | line source |
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1 -- mod_auth_ldap |
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2 |
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3 local new_sasl = require "util.sasl".new; |
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4 local lualdap = require "lualdap"; |
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5 |
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6 local function ldap_filter_escape(s) |
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7 return (s:gsub("[*()\\%z]", function(c) return ("\\%02x"):format(c:byte()) end)); |
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8 end |
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9 |
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10 -- Config options |
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11 local ldap_server = module:get_option_string("ldap_server", "localhost"); |
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12 local ldap_rootdn = module:get_option_string("ldap_rootdn", ""); |
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13 local ldap_password = module:get_option_string("ldap_password", ""); |
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14 local ldap_tls = module:get_option_boolean("ldap_tls"); |
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15 local ldap_scope = module:get_option_string("ldap_scope", "subtree"); |
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16 local ldap_filter = module:get_option_string("ldap_filter", "(uid=$user)"):gsub("%%s", "$user", 1); |
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17 local ldap_base = assert(module:get_option_string("ldap_base"), "ldap_base is a required option for ldap"); |
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18 local ldap_mode = module:get_option_string("ldap_mode", "bind"); |
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19 local ldap_admins = module:get_option_string("ldap_admin_filter", |
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20 module:get_option_string("ldap_admins")); -- COMPAT with mistake in documentation |
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21 local host = ldap_filter_escape(module:get_option_string("realm", module.host)); |
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22 |
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23 if ldap_admins then |
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24 module:log("error", "The 'ldap_admin_filter' option has been deprecated, ".. |
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25 "and will be ignored. Equivalent functionality may be added in ".. |
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26 "the future if there is demand." |
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27 ); |
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28 end |
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29 |
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30 -- Initiate connection |
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31 local ld = nil; |
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32 module.unload = function() if ld then pcall(ld, ld.close); end end |
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33 |
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34 function ldap_do_once(method, ...) |
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35 if ld == nil then |
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36 local err; |
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37 ld, err = lualdap.open_simple(ldap_server, ldap_rootdn, ldap_password, ldap_tls); |
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38 if not ld then return nil, err, "reconnect"; end |
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39 end |
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40 |
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41 -- luacheck: ignore 411/success |
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42 local success, iterator, invariant, initial = pcall(ld[method], ld, ...); |
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43 if not success then ld = nil; return nil, iterator, "search"; end |
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44 |
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45 local success, dn, attr = pcall(iterator, invariant, initial); |
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46 if not success then ld = nil; return success, dn, "iter"; end |
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47 |
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48 return dn, attr, "return"; |
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49 end |
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50 |
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51 function ldap_do(method, retry_count, ...) |
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52 local dn, attr, where; |
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53 for _=1,1+retry_count do |
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54 dn, attr, where = ldap_do_once(method, ...); |
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55 if dn or not(attr) then break; end -- nothing or something found |
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56 module:log("warn", "LDAP: %s %s (in %s)", tostring(dn), tostring(attr), where); |
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57 -- otherwise retry |
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58 end |
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59 if not dn and attr then |
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60 module:log("error", "LDAP: %s", tostring(attr)); |
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61 end |
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62 return dn, attr; |
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63 end |
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64 |
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65 function get_user(username) |
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66 module:log("debug", "get_user(%q)", username); |
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67 return ldap_do("search", 2, { |
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68 base = ldap_base; |
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69 scope = ldap_scope; |
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70 sizelimit = 1; |
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71 filter = ldap_filter:gsub("%$(%a+)", { |
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72 user = ldap_filter_escape(username); |
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73 host = host; |
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74 }); |
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75 }); |
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76 end |
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77 |
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78 local provider = {}; |
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79 |
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80 function provider.create_user(username, password) -- luacheck: ignore 212 |
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81 return nil, "Account creation not available with LDAP."; |
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82 end |
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83 |
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84 function provider.user_exists(username) |
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85 return not not get_user(username); |
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86 end |
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87 |
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88 function provider.set_password(username, password) |
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89 local dn, attr = get_user(username); |
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90 if not dn then return nil, attr end |
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91 if attr.userPassword == password then return true end |
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92 return ldap_do("modify", 2, dn, { '=', userPassword = password }); |
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93 end |
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94 |
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95 if ldap_mode == "getpasswd" then |
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96 function provider.get_password(username) |
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97 local dn, attr = get_user(username); |
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98 if dn and attr then |
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99 return attr.userPassword; |
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100 end |
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101 end |
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102 |
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103 function provider.test_password(username, password) |
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104 return provider.get_password(username) == password; |
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105 end |
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106 |
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107 function provider.get_sasl_handler() |
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108 return new_sasl(module.host, { |
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109 plain = function(sasl, username) -- luacheck: ignore 212/sasl |
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110 local password = provider.get_password(username); |
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111 if not password then return "", nil; end |
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112 return password, true; |
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113 end |
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114 }); |
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115 end |
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116 elseif ldap_mode == "bind" then |
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117 local function test_password(userdn, password) |
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118 local ok, err = lualdap.open_simple(ldap_server, userdn, password, ldap_tls); |
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119 if not ok then |
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120 module:log("debug", "ldap open_simple error: %s", err); |
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121 end |
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122 return not not ok; |
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123 end |
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124 |
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125 function provider.test_password(username, password) |
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126 local dn = get_user(username); |
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127 if not dn then return end |
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128 return test_password(dn, password) |
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129 end |
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130 |
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131 function provider.get_sasl_handler() |
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132 return new_sasl(module.host, { |
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133 plain_test = function(sasl, username, password) -- luacheck: ignore 212/sasl |
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134 return provider.test_password(username, password), true; |
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135 end |
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136 }); |
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137 end |
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138 else |
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139 module:log("error", "Unsupported ldap_mode %s", tostring(ldap_mode)); |
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140 end |
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141 |
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142 module:provides("auth", provider); |