author | aidan@jmad.org |
Wed, 03 Apr 2024 21:56:03 -0700 | |
changeset 13477 | 9eb081616842 |
parent 13228 | 71c28b36923f |
permissions | -rw-r--r-- |
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-- mod_auth_ldap |
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local new_sasl = require "prosody.util.sasl".new; |
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local lualdap = require "lualdap"; |
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|
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local function ldap_filter_escape(s) |
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return (s:gsub("[*()\\%z]", function(c) return ("\\%02x"):format(c:byte()) end)); |
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end |
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|
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-- Config options |
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local ldap_server = module:get_option_string("ldap_server", "localhost"); |
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local ldap_rootdn = module:get_option_string("ldap_rootdn", ""); |
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local ldap_password = module:get_option_string("ldap_password", ""); |
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local ldap_tls = module:get_option_boolean("ldap_tls"); |
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local ldap_scope = module:get_option_enum("ldap_scope", "subtree", "base", "onelevel"); |
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local ldap_filter = module:get_option_string("ldap_filter", "(uid=$user)"):gsub("%%s", "$user", 1); |
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local ldap_base = assert(module:get_option_string("ldap_base"), "ldap_base is a required option for ldap"); |
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local ldap_mode = module:get_option_enum("ldap_mode", "bind", "getpasswd"); |
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local ldap_admins = module:get_option_string("ldap_admin_filter", |
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module:get_option_string("ldap_admins")); -- COMPAT with mistake in documentation |
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local host = ldap_filter_escape(module:get_option_string("realm", module.host)); |
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if ldap_admins then |
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module:log("error", "The 'ldap_admin_filter' option has been deprecated, ".. |
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"and will be ignored. Equivalent functionality may be added in ".. |
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"the future if there is demand." |
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); |
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end |
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-- Initiate connection |
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local ld = nil; |
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module.unload = function() if ld then pcall(ld, ld.close); end end |
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function ldap_do_once(method, ...) |
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if ld == nil then |
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local err; |
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ld, err = lualdap.open_simple(ldap_server, ldap_rootdn, ldap_password, ldap_tls); |
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if not ld then return nil, err, "reconnect"; end |
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end |
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-- luacheck: ignore 411/success |
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local success, iterator, invariant, initial = pcall(ld[method], ld, ...); |
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if not success then ld = nil; return nil, iterator, "search"; end |
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|
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local success, dn, attr = pcall(iterator, invariant, initial); |
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if not success then ld = nil; return success, dn, "iter"; end |
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|
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return dn, attr, "return"; |
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end |
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|
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function ldap_do(method, retry_count, ...) |
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local dn, attr, where; |
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for _=1,1+retry_count do |
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dn, attr, where = ldap_do_once(method, ...); |
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if dn or not(attr) then break; end -- nothing or something found |
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module:log("warn", "LDAP: %s %s (in %s)", tostring(dn), tostring(attr), where); |
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-- otherwise retry |
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end |
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if not dn and attr then |
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module:log("error", "LDAP: %s", tostring(attr)); |
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end |
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return dn, attr; |
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end |
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|
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function get_user(username) |
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module:log("debug", "get_user(%q)", username); |
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return ldap_do("search", 2, { |
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base = ldap_base; |
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scope = ldap_scope; |
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sizelimit = 1; |
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filter = ldap_filter:gsub("%$(%a+)", { |
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user = ldap_filter_escape(username); |
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host = host; |
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}); |
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}); |
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end |
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local provider = {}; |
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function provider.create_user(username, password) -- luacheck: ignore 212 |
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return nil, "Account creation not available with LDAP."; |
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end |
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function provider.user_exists(username) |
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return not not get_user(username); |
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end |
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|
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function provider.set_password(username, password) |
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local dn, attr = get_user(username); |
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if not dn then return nil, attr end |
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if attr.userPassword == password then return true end |
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return ldap_do("modify", 2, dn, { '=', userPassword = password }); |
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end |
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if ldap_mode == "getpasswd" then |
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function provider.get_password(username) |
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local dn, attr = get_user(username); |
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if dn and attr then |
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return attr.userPassword; |
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end |
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101 |
end |
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|
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function provider.test_password(username, password) |
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return provider.get_password(username) == password; |
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end |
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|
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function provider.get_sasl_handler() |
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108 |
return new_sasl(module.host, { |
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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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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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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); |