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annotate mod_auth_ldap/mod_auth_ldap.lua @ 1274:4b15437d6c56

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mod_auth_ldap: Add support for binding
author Kim Alvefur <zash@zash.se>
date Wed, 15 Jan 2014 14:45:37 +0100
parents 1b543060f31e
children da2e593317d7
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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 -- Config options
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7 local ldap_server = module:get_option_string("ldap_server", "localhost");
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8 local ldap_rootdn = module:get_option_string("ldap_rootdn", "");
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9 local ldap_password = module:get_option_string("ldap_password", "");
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10 local ldap_tls = module:get_option_boolean("ldap_tls");
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11 local ldap_scope = module:get_option_string("ldap_scope", "onelevel");
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12 local ldap_filter = module:get_option_string("ldap_filter", "(uid=%s)");
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13 local ldap_base = assert(module:get_option_string("ldap_base"), "ldap_base is a required option for ldap");
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14 local ldap_mode = module:get_option_string("ldap_mode", "getpasswd");
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15
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16 -- Initiate connection
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17 local ld = assert(lualdap.open_simple(ldap_server, ldap_rootdn, ldap_password, ldap_tls));
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18 module.unload = function() ld:close(); end
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19
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20 local function ldap_filter_escape(s) return (s:gsub("[\\*\\(\\)\\\\%z]", function(c) return ("\\%02x"):format(c:byte()) end)); end
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22 local function get_user(username)
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23 module:log("debug", "get_user(%q)", username);
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24 return ld:search({
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25 base = ldap_base;
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26 scope = ldap_scope;
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27 filter = ldap_filter:format(ldap_filter_escape(username));
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28 })();
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29 end
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30
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31 local provider = {};
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32
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33 function provider.create_user(username, password)
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34 return nil, "Account creation not available with LDAP.";
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35 end
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36
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37 function provider.user_exists(username)
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38 return not not get_user(username);
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39 end
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40
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41 function provider.set_password(username, password)
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42 local dn, attr = get_user(username);
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43 if not dn then return nil, attr end
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44 if attr.userPassword == password then return true end
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45 return ld:modify(dn, { '=', userPassword = password })();
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46 end
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47
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48 if ldap_mode == "getpasswd" then
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49 function provider.get_password(username)
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50 local dn, attr = get_user(username);
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51 if dn and attr then
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52 return attr.userPassword;
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53 end
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54 end
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55
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56 function provider.test_password(username, password)
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57 return provider.get_password(username) == password;
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58 end
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59
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60 function provider.get_sasl_handler()
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61 return new_sasl(module.host, {
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62 plain = function(sasl, username)
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63 local password = provider.get_password(username);
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64 if not password then return "", nil; end
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65 return password, true;
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66 end
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67 });
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68 end
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69 elseif ldap_mode == "bind" then
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70 local function test_password(userdn, password)
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71 return not not lualdap.open_simple(ldap_server, userdn, password, ldap_tls);
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72 end
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74 function provider.test_password(username, password)
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75 local dn = get_user(username);
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76 if not dn then return end
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77 return test_password(dn, password)
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78 end
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79
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80 function provider.get_sasl_handler()
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81 return new_sasl(module.host, {
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82 plain_test = function(sasl, username, password)
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83 return provider.test_password(username, password), true;
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84 end
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85 });
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86 end
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87 else
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88 module:log("error", "Unsupported ldap_mode %s", tostring(ldap_mode));
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89 end
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90
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91 module:provides("auth", provider);